:root {color-scheme: dark;--bg-dark: #0a0a0a;--bg-card: #121218;--bg-input: #0404048a;--bg-secondary: #1a1a24;--bg-tertiary: #252532;--border-color: #2a2a3a;--text-primary: #e8e8e8;--text-secondary: #b8b8c8;--text-tertiary: #707080;--text-comment: #777777;--accent-purple: #9d4edd;--accent-orange: #ff6b35;--success-color: #22c55e;--error-color: #ef4444;--warning-color: #f59e0b;--terminal-color: #9d4edd;--card-gradient: linear-gradient(135deg, #1a1a1a 0%, #2d1b69 100%);--footer-bg: #0d0d12;--glow-purple: 0 0 20px rgba(157, 78, 221, 0.3);--space-xs: 0.25rem;--space-sm: 0.5rem;--space-md: 1rem;--space-lg: 1.5rem;--space-xl: 2rem;--space-xxl: 3rem;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 20px;--radius-round: 50%;--fs-2xs: 0.65rem;--fs-xs: 0.75rem;--fs-sm: 0.8rem;--fs-base: 0.85rem;--fs-md: 0.9rem;--fs-lg: 0.95rem;--fs-xl: 1rem;--fs-2xl: 1.1rem;--fs-3xl: 1.2rem;--fs-4xl: 1.3rem;--fs-5xl: 1.5rem;--fs-6xl: 1.8rem;--fs-7xl: 2rem;--fs-8xl: 2.5rem;}*, *::before, *::after {box-sizing: border-box;}html {height: 100%;background: #0d0d0d;}body {margin: 0;padding: 0;font-family: 'Source Code Pro', monospace;font-size: var(--fs-md);background: linear-gradient(135deg, #0d0d0d 0%, #1a0a2e 50%, #0d0d0d 100%);background-attachment: fixed;background-size: cover;color: var(--text-primary);line-height: 1.6;min-height: 100%;padding-top: 70px;display: flex;flex-direction: column;overflow-x: hidden;}@keyframes gradientShift {0% {background-position: 0% 50%;}50% {background-position: 100% 50%;}100% {background-position: 0% 50%;}}@keyframes elegantGradient {0%, 100% {background-position: 0% 50%;}50% {background-position: 100% 50%;}}@keyframes glitchIn {0% {opacity: 0;transform: scale(1.05) rotateX(90deg);filter: blur(8px);}100% {opacity: 1;transform: scale(1) rotateX(0deg);filter: blur(0);}}@keyframes fadeInUp {from {opacity: 0;transform: translateY(20px);}to {opacity: 1;transform: translateY(0);}}.ajax-loaded {animation: fadeInUp 0.4s ease-out backwards;}.ajax-loaded.challenge-card, .ajax-loaded.user-card {animation: fadeInUp 0.4s ease-out backwards;}.ajax-loaded.podium {animation: fadeInUp 0.5s ease-out;}.ajax-loaded.scoreboard-table {animation: fadeInUp 0.5s ease-out 0.1s backwards;}.ajax-loaded.your-rank-banner {animation: fadeInUp 0.4s ease-out;}a {color: var(--accent-purple);text-decoration: none;transition: color 0.3s ease;}a:hover {color: #b366e8;}h1, h2, h3, h4, h5, h6 {font-weight: 700;margin: 0 0 var(--space-md);font-family: 'Rajdhani', sans-serif;color: var(--accent-orange);font-size: var(--fs-2xl);letter-spacing: 1px;}p {margin: var(--space-md) 0;font-size: var(--fs-md);}ul, ol {margin: 0 0 var(--space-md);padding-left: var(--space-lg);}code {background: rgba(157, 78, 221, 0.2);padding: 0.2em 0.4em;border-radius: var(--radius-sm);font-size: var(--fs-md);}main {flex: 1;position: relative;}main::before {content: '';position: absolute;top: 0;left: 50%;transform: translateX(-50%);width: 100%;max-width: 1800px;height: 100%;background: radial-gradient(ellipse at top center, rgba(157, 78, 221, 0.08) 0%, transparent 60%);pointer-events: none;z-index: -1;}.comment-body, .comment-count, .hint-header, .hint-content {font-size: var(--fs-md);}.container {padding: var(--space-l);width: 100%;max-width: 1400px;margin: 0 auto;display: flex;flex-direction: column;position: relative;z-index: 10;}.page-header h1 {font-family: 'Rajdhani', sans-serif;font-size: clamp(var(--fs-7xl), 5vw, 3.5rem);font-weight: 700;color: transparent;background: linear-gradient(135deg, #ffffff 0%, var(--accent-purple) 50%, var(--accent-orange) 100%);background-size: 200% 200%;-webkit-background-clip: text;background-clip: text;animation: elegantGradient 8s ease-in-out infinite;margin-bottom: 0.5rem;filter: drop-shadow(0 0 20px rgba(157, 78, 221, 0.3));}.main-header {position: fixed;top: 0;left: 0;right: 0;height: 70px;background: linear-gradient(135deg, #060506 0%, #151015 100%);backdrop-filter: blur(10px);border-bottom: 1px solid var(--border-color);z-index: 1000;}.main-nav {max-width: 1400px;margin: 0 auto;height: 100%;display: flex;align-items: center;justify-content: space-between;padding: 0 var(--space-xl);}.nav-brand, .nav-logo {text-decoration: none;display: flex;align-items: center;gap: var(--space-sm);}.nav-logo-img {height: 40px;width: auto;margin-right: 5px;}.nav-logo-text {font-family: 'Rajdhani', sans-serif;font-size: var(--fs-7xl);font-weight: 700;line-height: 1;background: linear-gradient(135deg, #7b2cbf 0%, #9d4edd 15%, #b565f0 30%, #c77dff 45%, #9d4edd 60%, #7b2cbf 75%, #b565f0 90%, #9d4edd 100%);background-size: 300% 300%;-webkit-background-clip: text;background-clip: text;-webkit-text-fill-color: transparent;animation: brandShift 11s ease-in-out 1;}@keyframes brandShift {0% {background-position: 0% 50%;}50% {background-position: 100% 50%;}100% {background-position: 0% 50%;}}.nav-menu {display: flex;align-items: center;gap: var(--space-lg);list-style: none;margin: 0;padding: 0;font-size: var(--fs-xl);}.nav-menu a {color: var(--text-secondary);text-decoration: none;font-weight: 500;padding: var(--space-sm) var(--space-md);border-radius: var(--radius-md);transition: all 0.3s ease;}.nav-menu a:hover, .nav-menu a.active {color: var(--accent-purple);background: rgba(157, 78, 221, 0.1);text-shadow: 0 0 8px rgba(157, 78, 221, 0.4);}.nav-auth {display: flex;align-items: center;gap: var(--space-md);}.user-dropdown {position: relative;}.user-dropdown-toggle {display: flex;align-items: center;gap: var(--space-sm);cursor: pointer;padding: 0.4rem 0.8rem;border-radius: var(--radius-md);transition: background 0.2s ease;}.user-dropdown-toggle:hover {background: rgba(157, 78, 221, 0.1);}.user-avatar {width: 32px;height: 32px;border-radius: 50%;background: linear-gradient(135deg, var(--accent-purple), var(--accent-orange));display: flex;align-items: center;justify-content: center;font-weight: 700;font-size: var(--fs-base);color: #fff;overflow: hidden;}.user-avatar img {width: 100%;height: 100%;object-fit: cover;}.user-dropdown-toggle span {color: var(--text-primary);font-size: var(--fs-md);}.user-dropdown-toggle .user-xp {color: var(--accent-orange);font-weight: 600;}.dropdown-arrow {font-size: var(--fs-2xs);color: var(--text-tertiary);transition: transform 0.2s ease;}.user-dropdown.open .dropdown-arrow {transform: rotate(180deg);}.user-dropdown-menu {position: absolute;top: calc(100% + 8px);right: 0;min-width: 220px;background: #1e1e2a;border: 1px solid var(--border-color);border-radius: var(--radius-md);box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);opacity: 0;visibility: hidden;transform: translateY(-10px);transition: all 0.2s ease;z-index: 1000;backdrop-filter: blur(10px);}.user-dropdown.open .user-dropdown-menu {opacity: 1;visibility: visible;transform: translateY(0);}.user-dropdown-header {padding: var(--space-md);border-bottom: 1px solid var(--border-color);}.user-dropdown-header .username {font-weight: 600;color: var(--text-primary);}.user-dropdown-header .user-level {font-size: var(--fs-sm);color: var(--text-tertiary);}.user-dropdown-menu a {display: flex;align-items: center;gap: var(--space-sm);padding: 0.7rem var(--space-md);color: var(--text-secondary);text-decoration: none;transition: all 0.2s ease;}.user-dropdown-menu a:hover {background: rgba(157, 78, 221, 0.1);color: var(--text-primary);}.user-dropdown-menu a span {font-size: var(--fs-xl);}.user-dropdown-menu .logout-form {margin: 0;border-top: 1px solid var(--border-color);margin-top: var(--space-xs);}.user-dropdown-menu .logout-link {display: flex;align-items: center;gap: var(--space-sm);padding: 0.6rem 1rem;color: var(--error-color);text-decoration: none;font-size: var(--fs-md);transition: background 0.2s;background: none;border: none;width: 100%;text-align: left;cursor: pointer;font: inherit;}.user-dropdown-menu .logout-link:hover {background: rgba(239, 68, 68, 0.1);}.mobile-menu-toggle {display: none;}.mobile-menu {display: none;}.btn {display: inline-flex;align-items: center;justify-content: center;gap: var(--space-sm);padding: 0.6rem 1.2rem;font-size: var(--fs-md);font-weight: 600;border: none;border-radius: var(--radius-md);cursor: pointer;text-decoration: none;transition: all 0.3s ease;}.btn-primary {background: linear-gradient(135deg, var(--accent-purple) 0%, #7b2cbf 100%);color: #fff;box-shadow: 0 0 15px rgba(157, 78, 221, 0.3);}.btn-primary:hover {background: linear-gradient(135deg, #b366e8 0%, var(--accent-purple) 100%);color: #fff;box-shadow: 0 0 25px rgba(157, 78, 221, 0.5);}.btn-secondary {background: rgba(0, 0, 0, 0.3);border: 1px solid var(--border-color);color: var(--text-secondary);}.btn-secondary:hover {border-color: var(--accent-purple);color: var(--accent-purple);box-shadow: 0 0 10px rgba(157, 78, 221, 0.2);}.btn-success {background: var(--success-color);color: #fff;margin-left: 5px;margin-right: 5px;}.btn-danger {background: var(--error-color);color: #fff;}.btn-warning {background: var(--warning-color);color: #000;}.btn-outline {background: transparent;border: 1px solid var(--border-color);color: var(--text-secondary);}.btn-outline:hover {border-color: var(--text-primary);color: var(--text-primary);}.btn-warning-outline {background: transparent;border: 1px solid var(--warning-color);color: var(--warning-color);margin-left: 5px;margin-right: 5px;}.btn-warning-outline:hover {background: rgba(245, 158, 11, 0.1);}.btn-sm {padding: 0.4rem 0.8rem;font-size: var(--fs-sm);}.btn-lg {padding: 0.8rem 1.5rem;font-size: var(--fs-xl);}.form-group {margin-bottom: var(--space-lg);}.form-text {display: block;margin-top: var(--space-xs);font-size: var(--fs-base);color: var(--text-tertiary);}.form-label {display: block;margin-bottom: var(--space-sm);color: var(--text-primary);font-weight: 500;font-size: var(--fs-md);}.form-control {width: 100%;padding: 0.75rem 1rem;background: rgba(0, 0, 0, 0.5);border: 1px solid var(--border-color);border-radius: var(--radius-md);color: var(--text-primary);font-family: inherit;font-size: var(--fs-lg);transition: border-color 0.3s ease, box-shadow 0.3s ease;}.form-control:focus {outline: none;border-color: var(--accent-purple);box-shadow: 0 0 0 3px rgba(157, 78, 221, 0.2), 0 0 15px rgba(157, 78, 221, 0.1);}.form-control::placeholder {color: var(--text-tertiary);font-family: inherit;}select.form-control {appearance: none;background: rgba(0, 0, 0, 0.5) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23a0a0b0' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E") no-repeat right 1rem center;padding-right: 2.5rem;font-family: inherit;color-scheme: dark;}select.form-control option {background: var(--bg-secondary);color: var(--text-primary);}select.form-control option[value=""] {color: var(--text-tertiary);}select.form-control:invalid, select.form-control.placeholder-shown {color: var(--text-tertiary);}select.form-control:valid:not(.placeholder-shown) {color: var(--text-primary);}textarea.form-control {resize: vertical;min-height: 100px;font-family: inherit;}select {color-scheme: dark;}select option, select.form-control option, .form-control option, .contact-card select option, .input-with-icon select option, .challenge-form select option {background: var(--bg-secondary) !important;background-color: var(--bg-secondary) !important;color: var(--text-primary) !important;}input[type="checkbox"] {width: 18px;height: 18px;appearance: none;-webkit-appearance: none;background: rgba(0, 0, 0, 0.5);border: 1px solid var(--border-color);border-radius: 4px;position: relative;cursor: pointer;transition: all 0.2s ease;vertical-align: middle;}input[type="checkbox"]:hover {border-color: var(--accent-purple);}input[type="checkbox"]:checked {background: var(--accent-purple);border-color: var(--accent-purple);}input[type="checkbox"]:checked::after {content: '✓';position: absolute;top: 50%;left: 50%;transform: translate(-50%, -50%);color: white;font-size: var(--fs-xs);font-weight: bold;}input[type="radio"] {width: 18px;height: 18px;appearance: none;-webkit-appearance: none;background: rgba(0, 0, 0, 0.5);border: 1px solid var(--border-color);border-radius: 50%;position: relative;cursor: pointer;transition: all 0.2s ease;vertical-align: middle;}input[type="radio"]:hover {border-color: var(--accent-purple);}input[type="radio"]:checked {background: rgba(0, 0, 0, 0.5);border-color: var(--accent-purple);}input[type="radio"]:checked::after {content: '';position: absolute;top: 50%;left: 50%;transform: translate(-50%, -50%);width: 10px;height: 10px;background: var(--accent-purple);border-radius: 50%;}.alert {padding: var(--space-md) var(--space-lg);border-radius: var(--radius-md);margin-bottom: var(--space-lg);border-left: 4px solid;}.alert-success {background: rgba(34, 197, 94, 0.1);border-color: var(--success-color);color: var(--success-color);}.alert-danger {background: rgba(239, 68, 68, 0.1);border-color: var(--error-color);color: var(--error-color);}.alert-warning {background: rgba(245, 158, 11, 0.1);border-color: var(--warning-color);color: var(--warning-color);}.alert-info {background: rgba(157, 78, 221, 0.1);border-color: var(--accent-purple);color: var(--accent-purple);}.page-header {margin-bottom: var(--space-xl);padding-bottom: var(--space-lg);border-bottom: 1px solid var(--border-color);text-align: center;animation: glitchIn 0.8s ease-out;margin-top: var(--space-lg);}.page-header .subtitle {color: var(--text-secondary);margin: 0;font-size: var(--fs-xl);}.card, .panel {background: var(--card-gradient);border: 1px solid var(--border-color);border-radius: var(--radius-lg);overflow: hidden;box-shadow: 0 0 30px rgba(157, 78, 221, 0.05);animation: fadeInUp 0.5s ease-out;}.card:hover, .panel:hover {border-color: rgba(157, 78, 221, 0.3);box-shadow: 0 0 40px rgba(157, 78, 221, 0.1);}.panel-header {display: flex;justify-content: space-between;align-items: center;padding: var(--space-md) var(--space-lg);border-bottom: 1px solid var(--border-color);}.panel-header h3 {margin: 0;font-size: var(--fs-xl);}.panel-body {padding: var(--space-sm) var(--space-lg) var(--space-lg);}.content-page .panel-body {padding-left: var(--space-xxl);padding-right: var(--space-xxl);}.pill {display: inline-flex;align-items: center;padding: var(--space-xs) var(--space-sm);border-radius: var(--radius-xl);font-size: var(--fs-xs);font-weight: 600;text-transform: uppercase;letter-spacing: 0.5px;}.badge {display: inline-flex;align-items: center;padding: var(--space-xs) var(--space-sm);border-radius: var(--radius-sm);font-size: var(--fs-sm);font-weight: 600;}.stats-grid {display: grid;grid-template-columns: repeat(5, 1fr);gap: var(--space-lg);margin-bottom: var(--space-xl);max-width: 1100px;margin-left: auto;margin-right: auto;}.stat-card {background: var(--card-gradient);border: 1px solid var(--border-color);border-radius: var(--radius-lg);padding: var(--space-lg);text-align: center;transition: all 0.3s ease;box-shadow: 0 0 20px rgba(157, 78, 221, 0.05);animation: fadeInUp 0.5s ease-out backwards;}.stat-card:nth-child(1) {animation-delay: 0.1s;}.stat-card:nth-child(2) {animation-delay: 0.15s;}.stat-card:nth-child(3) {animation-delay: 0.2s;}.stat-card:nth-child(4) {animation-delay: 0.25s;}.stat-card:nth-child(5) {animation-delay: 0.3s;}.stat-card:hover {border-color: var(--accent-purple);transform: translateY(-2px);box-shadow: 0 0 30px rgba(157, 78, 221, 0.15);}.stat-icon {font-size: var(--fs-5xl);margin-bottom: var(--space-sm);}.stat-value {font-family: 'Rajdhani', sans-serif;font-size: var(--fs-7xl);font-weight: 700;color: var(--accent-orange);}.stat-label {color: var(--text-tertiary);font-size: var(--fs-base);text-transform: uppercase;letter-spacing: 0.5px;}.live-terminal {position: fixed;top: 70px;left: 0;right: 0;bottom: 0;pointer-events: none;overflow: hidden;z-index: 0;font-family: 'JetBrains Mono', 'Fira Code', monospace;font-size: var(--fs-base);line-height: 1.5;padding: var(--space-md);}.terminal-session {color: var(--terminal-color);opacity: 0.35;white-space: pre-wrap;word-break: break-all;}.cursor-live {display: inline-block;width: 8px;height: 1em;background: var(--terminal-color);animation: blink 1s step-end infinite;vertical-align: text-bottom;}@keyframes blink {0%, 100% {opacity: 1;}50% {opacity: 0;}}.live-terminal::before {content: '';position: absolute;top: 0;left: 0;right: 0;bottom: 0;background: linear-gradient( to bottom, transparent 50%, rgba(0, 0, 0, 0.05) 50% );background-size: 100% 4px;pointer-events: none;z-index: 1;}.live-terminal::after {content: '';position: absolute;top: 0;left: 0;right: 0;bottom: 0;background: radial-gradient(ellipse at center, rgba(157, 78, 221, 0.02) 0%, transparent 70%);pointer-events: none;z-index: 2;}.filters-bar, .filters-form {display: flex;flex-wrap: wrap;align-items: flex-end;gap: var(--space-md);padding: var(--space-lg);background: linear-gradient(135deg, #1a1a1a 0%, #2d1b69 100%);border: 1px solid var(--border-color);border-radius: var(--radius-lg);margin-bottom: var(--space-xl);animation: fadeInUp 0.4s ease-out;}.filter-group {display: flex;flex-direction: column;gap: var(--space-xs);}.filter-group label {font-size: var(--fs-xs);color: var(--text-tertiary);text-transform: uppercase;letter-spacing: 0.5px;}.filter-group select, .filter-group input[type="text"], .filter-group input[type="search"] {padding: 0.6rem 1rem;background: var(--bg-input);border: 1px solid var(--border-color);border-radius: var(--radius-md);color: var(--text-primary);font-size: var(--fs-md);min-width: 150px;height: 42px;}.filter-group select option {background: var(--bg-secondary);color: var(--text-primary);}.filter-group.search-group {flex: 1;min-width: 200px;}.filter-group.search-group input {width: 100%;}.filter-group .btn {height: 42px;}.category-pills {display: flex;flex-wrap: wrap;gap: var(--space-sm);margin-bottom: var(--space-lg);animation: fadeInUp 0.4s ease-out 0.1s backwards;}.category-pill {padding: var(--space-sm) var(--space-md);background: rgba(0, 0, 0, 0.3);border: 1px solid var(--border-color);border-radius: var(--radius-xl);color: var(--text-secondary);font-size: var(--fs-base);cursor: pointer;transition: all 0.3s ease;text-decoration: none;}.category-pill:hover, .category-pill.active {border-color: var(--accent-purple);color: #ffffff;background: rgba(157, 78, 221, 0.3);box-shadow: 0 0 10px rgba(157, 78, 221, 0.2);}.challenge-grid {display: grid;grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));gap: var(--space-lg);}.challenge-card {background: linear-gradient(135deg, #1a1a1a 0%, #2d1b69 100%);border: 1px solid var(--border-color);border-radius: var(--radius-lg);padding: var(--space-lg);transition: all 0.3s ease;display: flex;flex-direction: column;position: relative;box-shadow: 0 0 20px rgba(157, 78, 221, 0.05);animation: fadeInUp 0.4s ease-out backwards;}.challenge-card:nth-child(1) {animation-delay: 0.05s;}.challenge-card:nth-child(2) {animation-delay: 0.1s;}.challenge-card:nth-child(3) {animation-delay: 0.15s;}.challenge-card:nth-child(4) {animation-delay: 0.2s;}.challenge-card:nth-child(5) {animation-delay: 0.25s;}.challenge-card:nth-child(6) {animation-delay: 0.3s;}.challenge-card:nth-child(n+7) {animation-delay: 0.35s;}.challenge-card:hover {border-color: var(--accent-purple);transform: translateY(-3px);box-shadow: 0 0 30px rgba(157, 78, 221, 0.15);}.challenge-card.solved {border-left: 4px solid var(--success-color);}.challenge-card-header {display: flex;justify-content: space-between;align-items: flex-start;margin-bottom: var(--space-md);}.challenge-card-header .challenge-badges {display: flex;align-items: center;gap: var(--space-sm);}.challenge-category {font-size: var(--fs-xs);text-transform: uppercase;letter-spacing: 0.5px;font-weight: 600;}.challenge-xp, .xp-pill {background: rgba(255, 107, 53, 0.3);color: var(--accent-orange);padding: var(--space-xs) var(--space-sm);border-radius: var(--radius-xl);font-weight: 700;font-size: var(--fs-sm);border: 1px solid rgba(255, 107, 53, 0.4);}.solved-pill {background: rgba(34, 197, 94, 0.25);color: var(--success-color);padding: var(--space-xs) var(--space-sm);border-radius: var(--radius-xl);font-size: var(--fs-sm);font-weight: 700;border: 1px solid rgba(34, 197, 94, 0.4);}.challenge-title {font-size: var(--fs-2xl);margin-bottom: var(--space-sm);}.challenge-title a {color: var(--text-primary);}.challenge-title a:hover {color: var(--accent-purple);}.challenge-description {color: var(--text-secondary);font-size: var(--fs-md);margin-bottom: var(--space-md);flex: 1;}.challenge-tags {display: flex;flex-wrap: wrap;gap: var(--space-xs);margin-bottom: var(--space-md);font-size: var(--fs-xs);color: var(--text-tertiary);}.challenge-meta {display: flex;justify-content: space-between;align-items: center;padding-top: var(--space-xs);border-top: 1px solid var(--border-color);font-size: var(--fs-sm);color: var(--text-tertiary);}.challenge-difficulty {display: flex;gap: 2px;}.challenge-stats {display: flex;align-items: center;gap: var(--space-md);font-size: var(--fs-sm);}.challenge-stats span {display: flex;align-items: center;gap: 4px;}.challenge-stats .icon {font-size: var(--fs-md);}.challenge-author {font-size: var(--fs-xs);color: var(--text-tertiary);}.challenge-author a {color: var(--accent-purple);font-size: var(--fs-xs);}.challenge-detail {width: 100%;max-width: 1600px;margin: 0 auto;padding: var(--space-xl);}.challenge-detail .breadcrumb {display: flex;align-items: center;gap: var(--space-sm);margin-bottom: var(--space-xl);font-size: var(--fs-md);color: var(--text-secondary);}.challenge-detail .breadcrumb a {color: var(--accent-purple);}.challenge-detail .breadcrumb .separator {color: var(--text-tertiary);}.challenge-detail .breadcrumb .current {color: var(--text-primary);}.challenge-layout {display: grid;grid-template-columns: 1fr 320px;gap: var(--space-xl);}.challenge-main {display: flex;flex-direction: column;gap: var(--space-lg);min-width: 0;}.challenge-sidebar {display: flex;flex-direction: column;gap: var(--space-lg);min-width: 0;}.challenge-header-card {background: linear-gradient(135deg, #1a1a1a 0%, #2d1b69 100%);border: 1px solid var(--border-color);border-radius: var(--radius-lg);padding: var(--space-xl);}.challenge-header-top {display: flex;justify-content: space-between;align-items: center;margin-bottom: var(--space-md);}.category-badge {display: inline-block;padding: var(--space-xs) var(--space-md);border-radius: var(--radius-sm);font-size: var(--fs-xs);font-weight: 600;color: #fff;text-transform: uppercase;letter-spacing: 0.5px;white-space: nowrap;}.challenge-difficulty {display: flex;align-items: center;gap: var(--space-sm);}.challenge-difficulty .stars {font-size: var(--fs-5xl);padding-bottom: 4px;}.challenge-difficulty .stars .difficulty-stars {font-size: var(--fs-5xl);}.challenge-difficulty .label {font-size: var(--fs-md);color: var(--text-secondary);}.difficulty{font-size: var(--fs-5xl);}.difficulty-stars {font-size: var(--fs-5xl);letter-spacing: 1px;white-space: nowrap;}.difficulty-1 {color: #22c55e;}.difficulty-2 {color: #84cc16;}.difficulty-3 {color: #eab308;}.difficulty-4 {color: #f97316;}.difficulty-5 {color: #ef4444;}.challenge-title {font-size: var(--fs-6xl);margin-bottom: var(--space-md);display: flex;align-items: center;gap: var(--space-md);text-shadow: 0 0 15px rgba(157, 78, 221, 0.3);}.solved-badge {font-size: var(--fs-base);padding: var(--space-xs) var(--space-sm);background: rgba(34, 197, 94, 0.25);color: var(--success-color);border-radius: var(--radius-xl);border: 1px solid rgba(34, 197, 94, 0.4);font-weight: 700;}.challenge-meta {display: flex;align-items: center;gap: var(--space-lg);color: var(--text-secondary);}.challenge-meta .meta-item strong {color: var(--accent-orange);}.action-btn {display: inline-flex;align-items: center;gap: var(--space-xs);padding: var(--space-sm) var(--space-md);background: rgba(255, 255, 255, 0.05);border: 1px solid var(--border-color);border-radius: var(--radius-md);color: var(--text-secondary);cursor: pointer;transition: all 0.3s ease;}.action-btn:hover, .action-btn.liked {border-color: var(--error-color);color: var(--error-color);}.panel {background: var(--card-gradient);border: 1px solid var(--border-color);border-radius: var(--radius-lg);overflow: hidden;}.panel > h3 {padding: var(--space-md) var(--space-lg);margin: 0;font-size: var(--fs-xl);color: var(--accent-orange);border-bottom: 1px solid var(--border-color);background: rgba(0, 0, 0, 0.2);}.panel > h3 + .form-group, .panel > h3 + .form-text, .panel > h3 + p, .panel > h3 + .info-list, .panel > h3 + .form-row {padding-top: var(--space-lg);padding-left: var(--space-lg);padding-right: var(--space-lg);}.panel > .form-group, .panel > .form-row, .panel > .form-text, .panel > .info-list {padding-left: var(--space-lg);padding-right: var(--space-lg);}.panel > .form-group:last-child, .panel > .form-row:last-child, .panel > div:last-child {padding-bottom: var(--space-lg);}.panel-header {padding: var(--space-md) var(--space-lg);border-bottom: 1px solid var(--border-color);background: rgba(0, 0, 0, 0.2);}.panel-header h3 {margin: 0;font-size: var(--fs-xl);color: var(--text-primary);}.challenge-description {color: var(--text-secondary);line-height: 1.8;overflow-wrap: break-word;word-break: break-word;}.challenge-description code {font-family: 'Fira Code', 'Consolas', 'Monaco', monospace;background: rgba(0, 0, 0, 0.4);padding: 0.2em 0.5em;border-radius: var(--radius-sm);font-size: var(--fs-md);color: var(--accent-cyan);border: 1px solid var(--border-color);}.challenge-description pre {background: rgba(0, 0, 0, 0.5);border: 1px solid var(--border-color);border-left: 3px solid var(--accent-purple);border-radius: var(--radius-md);padding: var(--space-md) var(--space-lg);margin: var(--space-md) 0;overflow-x: auto;max-height: 400px;overflow-y: auto;}.challenge-description pre code {background: none;padding: 0;border: none;border-radius: 0;font-size: var(--fs-base);line-height: 1.6;color: var(--accent-cyan);display: block;white-space: pre;}.challenge-description strong {color: var(--text-primary);font-weight: 600;}.challenge-description em {color: var(--text-secondary);font-style: italic;}.challenge-resources {margin-top: var(--space-lg);margin-bottom: var(--space-lg);}.lab-connect pre {background: rgba(0, 0, 0, 0.5);border: 1px solid var(--border-color);border-left: 3px solid var(--accent-orange);border-radius: var(--radius-md);padding: var(--space-md) var(--space-lg);margin: var(--space-md) 0;overflow-x: auto;}.lab-connect pre code {background: none;padding: 0;border: none;font-size: var(--fs-md);color: var(--text-primary);}.challenge-tags {display: flex;flex-wrap: wrap;gap: var(--space-sm);margin-top: var(--space-lg);}.flag-panel.solved {border-color: var(--success-color);}.flag-panel.solved .panel-header {background: rgba(34, 197, 94, 0.1);}.flag-input-group {display: flex;gap: var(--space-md);}.flag-input-group input {flex: 1;font-family: 'Source Code Pro', monospace;letter-spacing: 0.5px;}.flag-result {margin-top: var(--space-md);padding: var(--space-md);border-radius: var(--radius-md);display: none;}.flag-result.success {display: block;background: rgba(34, 197, 94, 0.1);color: var(--success-color);border: 1px solid var(--success-color);}.flag-result.error {display: block;background: rgba(239, 68, 68, 0.1);color: var(--error-color);border: 1px solid var(--error-color);}.hints-list {display: flex;flex-direction: column;gap: var(--space-md);}.hint-item {padding: var(--space-md);background: rgba(0, 0, 0, 0.2);border-radius: var(--radius-md);border-left: 3px solid var(--border-color);}.hint-item.unlocked {border-left-color: var(--success-color);}.hint-header {display: flex;justify-content: space-between;margin-bottom: var(--space-sm);}.hint-number {font-weight: 600;color: var(--text-primary);}.hint-cost {background: rgba(255, 107, 53, 0.15);color: var(--accent-orange);font-size: var(--fs-sm);font-weight: 600;padding: 2px 8px;border-radius: var(--radius-xl);border: 1px solid rgba(255, 107, 53, 0.25);}.hint-content {color: var(--text-secondary);}.hint-content code {background: rgba(157, 78, 221, 0.2);color: var(--accent);padding: 0.2em 0.4em;border-radius: 4px;font-family: 'Fira Code', 'Monaco', 'Consolas', monospace;font-size: var(--fs-md);}.hint-content kbd {background: var(--dark-light);border: 1px solid var(--border-color);border-radius: 4px;padding: 0.2em 0.5em;font-family: 'Fira Code', 'Monaco', 'Consolas', monospace;font-size: var(--fs-base);box-shadow: 0 1px 2px rgba(0,0,0,0.2);}.comments-section .comment-form {margin-bottom: var(--space-lg);}.comments-list {display: flex;flex-direction: column;gap: var(--space-md);}.panel-body > p.text-muted + .comments-list {margin-top: var(--space-md);}.panel-body > p.text-muted {margin: 0;}.comment {padding: var(--space-md);background: rgba(0, 0, 0, 0.2);border-radius: var(--radius-md);}.comment-header {display: flex;justify-content: space-between;margin-bottom: var(--space-sm);}.comment-author {color: var(--accent-purple);font-weight: 500;}.comment-time {color: var(--text-tertiary);font-size: var(--fs-base);}.comment-content {color: var(--text-secondary);}.blood-user {display: flex;align-items: center;gap: var(--space-sm);color: var(--accent-purple);}.blood-icon {font-size: var(--fs-3xl);}.blood-time {color: var(--text-tertiary);font-size: var(--fs-base);margin-top: var(--space-xs);}.solvers-list {display: flex;flex-direction: column;gap: var(--space-sm);}.solver-item {display: flex;align-items: center;padding: var(--space-sm);border-radius: var(--radius-sm);transition: background 0.3s ease;gap: var(--space-sm);}.solver-item:hover {background: rgba(157, 78, 221, 0.1);}.solver-name {color: var(--accent-purple);text-decoration: none;}.solver-name:hover {text-decoration: underline;}.solver-item .first-blood-badge {flex-shrink: 0;}.solver-time {color: var(--text-tertiary);font-size: var(--fs-sm);margin-left: auto;}.author-card {display: block;padding: var(--space-md);background: rgba(0, 0, 0, 0.2);border-radius: var(--radius-md);transition: background 0.3s ease;text-decoration: none;}.author-card:hover {background: rgba(157, 78, 221, 0.1);}.author-name {color: var(--text-primary);font-weight: 500;}.author-username {color: var(--text-tertiary);font-size: var(--fs-base);}.stats-list {display: flex;flex-direction: column;gap: var(--space-xs);}.stat-row {display: flex;justify-content: space-between;align-items: center;padding: var(--space-sm) 0;border-bottom: 1px solid var(--border-color);}.stat-row:last-child {border-bottom: none;}.stat-label {color: var(--text-secondary);font-size: var(--fs-base);text-transform: uppercase;}.stat-value-sm {color: var(--accent-orange);font-weight: 600;font-size: var(--fs-xl);}@media (max-width: 900px) {.challenge-layout {grid-template-columns: 1fr;}.challenge-sidebar {order: -1;}}.scoreboard-filters {display: flex;justify-content: center;gap: var(--space-md);margin-bottom: var(--space-xl);animation: fadeInUp 0.4s ease-out;}.scoreboard-filter-pill {padding: var(--space-sm) var(--space-lg);background: rgba(0, 0, 0, 0.3);border: 1px solid var(--border-color);border-radius: var(--radius-xl);color: var(--text-secondary);font-size: var(--fs-md);cursor: pointer;transition: all 0.3s ease;text-decoration: none;}.scoreboard-filter-pill:hover, .scoreboard-filter-pill.active {border-color: var(--accent-purple);color: #ffffff;background: rgba(157, 78, 221, 0.3);box-shadow: 0 0 10px rgba(157, 78, 221, 0.2);}.podium {display: flex;justify-content: center;align-items: flex-end;gap: var(--space-xl);margin-bottom: var(--space-xxl);padding: var(--space-xl) 0;}.podium-place {background: linear-gradient(135deg, #1a1a1a 0%, #2d1b69 100%);border: 1px solid var(--border-color);border-radius: var(--radius-lg);padding: var(--space-xl);text-align: center;width: 240px;transition: all 0.3s ease;animation: fadeInUp 0.5s ease-out backwards;}.podium-place.second {animation-delay: 0.1s;}.podium-place.first {animation-delay: 0.2s;}.podium-place.third {animation-delay: 0.3s;}.podium-place:hover {border-color: var(--accent-purple);box-shadow: var(--glow-purple);}.podium-place.first {transform: scale(1.1);border-color: #ffd700;box-shadow: 0 0 30px rgba(255, 215, 0, 0.2);}.podium-place.second {border-color: #c0c0c0;}.podium-place.third {border-color: #cd7f32;}.podium-rank {font-size: var(--fs-8xl);margin-bottom: var(--space-sm);}.podium-avatar {width: 80px;height: 80px;border-radius: var(--radius-round);margin: 0 auto var(--space-md);background: linear-gradient(135deg, var(--accent-purple), var(--accent-orange));display: flex;align-items: center;justify-content: center;font-size: var(--fs-7xl);font-weight: 600;color: #fff;overflow: hidden;}.podium-avatar img {width: 100%;height: 100%;object-fit: cover;}.podium-name {font-weight: 600;color: var(--text-primary);margin-bottom: var(--space-xs);}.podium-name a {color: inherit;}.podium-xp {color: var(--accent-orange);font-weight: 700;font-family: 'Rajdhani', sans-serif;font-size: var(--fs-3xl);}.scoreboard-table {width: 100%;border-collapse: separate;border-spacing: 0;background: linear-gradient(135deg, #1a1a1a 0%, #2d1b69 100%);border: 1px solid var(--border-color);border-radius: var(--radius-lg);overflow: hidden;animation: fadeInUp 0.5s ease-out;}.scoreboard-table .xp-col {text-align: center;font-family: 'Rajdhani', sans-serif;color: var(--accent-orange);font-weight: 700;}.scoreboard-table .rank-col, .scoreboard-table .level-col, .scoreboard-table .solves-col, .scoreboard-table .fb-col {text-align: center;}.scoreboard-table th, .scoreboard-table td {padding: var(--space-md) var(--space-lg);text-align: left;border-bottom: 1px solid var(--border-color);}.scoreboard-table th.rank-col, .scoreboard-table th.level-col, .scoreboard-table th.solves-col, .scoreboard-table th.fb-col, .scoreboard-table th.xp-col, .scoreboard-table td.rank-col, .scoreboard-table td.level-col, .scoreboard-table td.solves-col, .scoreboard-table td.fb-col, .scoreboard-table td.xp-col {text-align: center;}.scoreboard-table th {font-size: var(--fs-sm);text-transform: uppercase;letter-spacing: 0.5px;background: rgba(0, 0, 0, 0.3);color: var(--accent-purple);font-weight: 600;}.scoreboard-table tr:hover {background: rgba(157, 78, 221, 0.05);}.scoreboard-table tr:last-child td {border-bottom: none;}.rank-cell {font-weight: 700;color: var(--text-tertiary);width: 60px;}.rank-cell.top-3 {font-size: var(--fs-3xl);}.user-cell {display: flex;align-items: center;gap: var(--space-md);}.user-cell .avatar {width: 40px;height: 40px;border-radius: var(--radius-round);background: linear-gradient(135deg, var(--accent-purple), var(--accent-orange));display: flex;align-items: center;justify-content: center;font-weight: 600;color: #fff;overflow: hidden;flex-shrink: 0;}.user-cell .avatar img {width: 100%;height: 100%;object-fit: cover;}.user-cell .username {color: var(--text-primary);font-weight: 600;}.user-cell .username a {color: inherit;}.user-cell .username a:hover {color: var(--accent-purple);}.xp-cell {color: var(--accent-orange);font-weight: 700;font-family: 'Rajdhani', sans-serif;font-size: var(--fs-2xl);}.solves-cell {color: var(--text-secondary);}.alphabet-filter {display: flex;flex-wrap: wrap;gap: var(--space-xs);margin-bottom: var(--space-lg);justify-content: center;}.letter-pill {display: inline-flex;align-items: center;justify-content: center;min-width: 32px;height: 32px;padding: 0 var(--space-xs);background: var(--surface);border: 1px solid var(--border-color);border-radius: var(--radius-sm);color: var(--text-secondary);font-size: var(--fs-base);font-weight: 500;text-decoration: none;transition: all 0.2s;}.letter-pill:hover {border-color: var(--accent-purple);color: var(--accent-purple);background: rgba(157, 78, 221, 0.1);}.letter-pill.active {background: var(--accent-purple);border-color: var(--accent-purple);color: white;}.users-grid {display: grid;grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));gap: var(--space-lg);}.user-card {background: linear-gradient(135deg, #1a1a1a 0%, #2d1b69 100%);border: 1px solid var(--border-color);border-radius: var(--radius-lg);padding: var(--space-lg);text-align: center;transition: all 0.3s ease;box-shadow: 0 0 20px rgba(157, 78, 221, 0.05);animation: fadeInUp 0.4s ease-out backwards;}.user-card:nth-child(1) {animation-delay: 0.05s;}.user-card:nth-child(2) {animation-delay: 0.1s;}.user-card:nth-child(3) {animation-delay: 0.15s;}.user-card:nth-child(4) {animation-delay: 0.2s;}.user-card:nth-child(5) {animation-delay: 0.25s;}.user-card:nth-child(6) {animation-delay: 0.3s;}.user-card:nth-child(n+7) {animation-delay: 0.35s;}.user-card:hover {border-color: var(--accent-purple);transform: translateY(-3px);box-shadow: 0 0 30px rgba(157, 78, 221, 0.15);}.user-card .avatar {width: 70px;height: 70px;border-radius: var(--radius-round);margin: 0 auto var(--space-md);background: linear-gradient(135deg, var(--accent-purple), var(--accent-orange));display: flex;align-items: center;justify-content: center;font-size: var(--fs-5xl);font-weight: 600;color: #fff;overflow: hidden;}.user-card .avatar img {width: 100%;height: 100%;object-fit: cover;}.user-card .display-name {font-weight: 600;color: var(--text-primary);margin-bottom: 0;font-size: var(--fs-xl);}.user-card .username {color: var(--accent-purple);font-size: var(--fs-base);margin-bottom: var(--space-sm);}.user-card .username a {color: inherit;}.user-card .user-stats {font-size: var(--fs-base);color: var(--text-secondary);display: flex;align-items: center;gap: var(--space-sm);flex-wrap: wrap;justify-content: center;}.user-card .user-stats .xp-pill {background: rgba(255, 107, 53, 0.2);color: var(--accent-orange);padding: 2px 8px;border-radius: var(--radius-xl);font-weight: 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1px solid var(--border-color);border-radius: var(--radius-lg);padding: var(--space-xxl) var(--space-xl);box-shadow: 0 0 40px rgba(157, 78, 221, 0.1);animation: fadeInUp 0.5s ease-out;}.auth-form .form-label {font-family: inherit;font-size: var(--fs-md);color: var(--text-primary);font-weight: 500;}.auth-form .form-control, .auth-form .form-control::placeholder {font-family: inherit;font-size: var(--fs-lg);}.auth-form .form-control::placeholder {color: var(--text-tertiary);}.auth-form .form-control {padding: var(--space-md) var(--space-lg);}.input-with-icon {position: relative;display: flex;align-items: center;}.input-with-icon .input-icon {position: absolute;left: var(--space-md);width: 20px;height: 20px;color: var(--text-tertiary);pointer-events: none;z-index: 1;display: flex;align-items: center;justify-content: center;}.input-with-icon .input-icon.icon-email::before {content: '';width: 18px;height: 18px;background: currentColor;-webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Crect x='2' y='4' width='20' height='16' rx='2'/%3E%3Cpath d='M22 6l-10 7L2 6'/%3E%3C/svg%3E") center/contain no-repeat;mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Crect x='2' y='4' width='20' height='16' rx='2'/%3E%3Cpath d='M22 6l-10 7L2 6'/%3E%3C/svg%3E") center/contain no-repeat;}.input-with-icon .input-icon.icon-lock::before {content: '';width: 18px;height: 18px;background: currentColor;-webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Crect x='3' y='11' width='18' height='11' rx='2'/%3E%3Cpath d='M7 11V7a5 5 0 0110 0v4'/%3E%3C/svg%3E") center/contain no-repeat;mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Crect x='3' y='11' width='18' height='11' rx='2'/%3E%3Cpath d='M7 11V7a5 5 0 0110 0v4'/%3E%3C/svg%3E") center/contain no-repeat;}.input-with-icon .input-icon.icon-user::before {content: '';width: 18px;height: 18px;background: currentColor;-webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Ccircle cx='12' cy='7' r='4'/%3E%3Cpath d='M5.5 21a8.5 8.5 0 0113 0'/%3E%3C/svg%3E") center/contain no-repeat;mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Ccircle cx='12' cy='7' r='4'/%3E%3Cpath d='M5.5 21a8.5 8.5 0 0113 0'/%3E%3C/svg%3E") center/contain no-repeat;}.input-with-icon .input-icon.icon-clipboard::before {content: '';width: 18px;height: 18px;background: currentColor;-webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Crect x='4' y='4' width='16' height='18' rx='2'/%3E%3Cpath d='M9 4V2h6v2'/%3E%3C/svg%3E") center/contain no-repeat;mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Crect x='4' y='4' width='16' height='18' rx='2'/%3E%3Cpath d='M9 4V2h6v2'/%3E%3C/svg%3E") center/contain no-repeat;}.input-with-icon .input-icon.icon-message::before {content: '';width: 18px;height: 18px;background: currentColor;-webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Cpath d='M21 15a2 2 0 01-2 2H7l-4 4V5a2 2 0 012-2h14a2 2 0 012 2z'/%3E%3C/svg%3E") center/contain no-repeat;mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Cpath d='M21 15a2 2 0 01-2 2H7l-4 4V5a2 2 0 012-2h14a2 2 0 012 2z'/%3E%3C/svg%3E") center/contain no-repeat;}.input-with-icon .form-control {padding-left: 2.75rem;}.input-with-icon select.form-control {padding-left: 2.75rem;}.input-with-icon select.form-control option {background: var(--bg-secondary);color: var(--text-primary);}.input-with-icon--textarea {align-items: flex-start;}.input-with-icon--textarea .input-icon {top: var(--space-md);}.input-with-icon--textarea .form-control {padding-left: 2.75rem;}.password-toggle {position: absolute;right: var(--space-sm);background: none;border: none;cursor: pointer;padding: var(--space-xs) var(--space-sm);color: var(--text-tertiary);transition: color 0.2s;z-index: 1;display: flex;align-items: center;justify-content: center;width: 32px;height: 32px;}.password-toggle:hover {color: var(--text-primary);}.password-toggle .eye-icon {width: 20px;height: 20px;background: currentColor;-webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Cpath d='M1 12s4-8 11-8 11 8 11 8-4 8-11 8-11-8-11-8z'/%3E%3Ccircle cx='12' cy='12' r='3'/%3E%3C/svg%3E") center/contain no-repeat;mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Cpath d='M1 12s4-8 11-8 11 8 11 8-4 8-11 8-11-8-11-8z'/%3E%3Ccircle cx='12' cy='12' r='3'/%3E%3C/svg%3E") center/contain no-repeat;display: block;}.password-toggle.revealed .eye-icon {-webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Cpath d='M17.94 17.94A10.07 10.07 0 0112 20c-7 0-11-8-11-8a18.45 18.45 0 015.06-5.94M9.9 4.24A9.12 9.12 0 0112 4c7 0 11 8 11 8a18.5 18.5 0 01-2.16 3.19m-6.72-1.07a3 3 0 11-4.24-4.24'/%3E%3Cline x1='1' y1='1' x2='23' y2='23'/%3E%3C/svg%3E") center/contain no-repeat;mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Cpath d='M17.94 17.94A10.07 10.07 0 0112 20c-7 0-11-8-11-8a18.45 18.45 0 015.06-5.94M9.9 4.24A9.12 9.12 0 0112 4c7 0 11 8 11 8a18.5 18.5 0 01-2.16 3.19m-6.72-1.07a3 3 0 11-4.24-4.24'/%3E%3Cline x1='1' y1='1' x2='23' y2='23'/%3E%3C/svg%3E") center/contain no-repeat;}.input-with-icon input[type="password"], .input-with-icon input[type="text"] {padding-right: 3rem;}.auth-form .btn-block {padding: var(--space-md) var(--space-lg);font-size: var(--fs-xl);}.auth-header {text-align: center;margin-bottom: var(--space-xl);}.auth-header h1 {font-size: var(--fs-6xl);margin-bottom: var(--space-sm);text-shadow: 0 0 15px rgba(157, 78, 221, 0.3);}.auth-header p {color: var(--text-secondary);margin: 0;}.auth-form .checkbox-label {display: flex;align-items: center;gap: var(--space-sm);color: var(--text-secondary);font-size: var(--fs-md);cursor: pointer;}.auth-form .checkbox-label input[type="checkbox"] {width: 18px;height: 18px;accent-color: var(--accent-purple);cursor: pointer;appearance: none;-webkit-appearance: none;background: rgba(0, 0, 0, 0.5);border: 1px solid var(--border-color);border-radius: 4px;position: relative;transition: all 0.2s ease;}.auth-form .checkbox-label input[type="checkbox"]:hover {border-color: var(--accent-purple);}.auth-form .checkbox-label input[type="checkbox"]:checked {background: var(--accent-purple);border-color: var(--accent-purple);}.auth-form .checkbox-label input[type="checkbox"]:checked::after {content: '✓';position: absolute;top: 50%;left: 50%;transform: translate(-50%, -50%);color: white;font-size: var(--fs-xs);font-weight: bold;}.auth-form .checkbox-label a {color: var(--accent-purple);}.auth-form .checkbox-group {margin-bottom: var(--space-md);}.auth-footer {text-align: center;margin-top: var(--space-lg);padding-top: var(--space-lg);border-top: 1px solid var(--border-color);color: var(--text-tertiary);}.auth-footer a {color: var(--accent-purple);margin-left: var(--space-sm);}.auth-links {display: flex;flex-direction: column;align-items: center;gap: var(--space-sm);margin-top: var(--space-md);font-size: var(--fs-md);border-top: 1px solid var(--border-color);margin-top: 1.5rem;padding-top: 1.5rem;}.auth-links a {color: var(--accent-purple);}.comment-text {color: var(--text-comment);padding-left:4px;}.contact-page {display: flex;flex-direction: column;align-items: center;padding: var(--space-xl) var(--space-md);width: 100%;}.contact-success {text-align: center;padding: 4rem 2rem;max-width: 500px;margin: 0 auto;}.contact-success .success-icon {width: 80px;height: 80px;border-radius: 50%;background: var(--success);color: white;font-size: var(--fs-8xl);display: flex;align-items: center;justify-content: center;margin: 0 auto var(--space-lg);}.contact-success h2 {color: var(--success);margin-bottom: var(--space-sm);}.contact-success p {color: var(--text-secondary);margin-bottom: var(--space-xl);}.contact-card {width: 100%;max-width: 700px;background: var(--card-gradient);border: 1px solid var(--border-color);border-radius: var(--radius-lg);padding: var(--space-xxl) var(--space-xl);box-shadow: 0 0 40px rgba(157, 78, 221, 0.1);animation: fadeInUp 0.5s ease-out;}.contact-card .form-label {font-family: inherit;font-size: var(--fs-md);color: var(--text-primary);text-transform: none;letter-spacing: normal;font-weight: 500;}.contact-card .form-control, .contact-card .form-control::placeholder {font-family: inherit;font-size: var(--fs-lg);}.contact-card .form-control::placeholder {color: var(--text-tertiary);}.contact-card .form-row {display: grid;grid-template-columns: 1fr 1fr;gap: var(--space-md);}.contact-card textarea.form-control {min-height: 180px;resize: vertical;}.contact-card select.form-control option {background: var(--bg-secondary);color: var(--text-primary);}@media (max-width: 600px) {.contact-card .form-row {grid-template-columns: 1fr;}}.dashboard {margin-bottom: var(--space-xl);}.dashboard-grid {display: grid;grid-template-columns: 1fr 350px;gap: var(--space-xl);}.dashboard-sidebar {display: flex;flex-direction: column;gap: var(--space-lg);}.hero-section {margin-bottom: var(--space-xl);text-align: center;}.hero-title {font-size: var(--fs-8xl);margin-bottom: var(--space-sm);margin-top: var(--space-lg);text-shadow: 0 0 30px rgba(157, 78, 221, 0.4);animation: fadeInUp 0.6s ease-out;}.hero-title .highlight {color: var(--accent-purple);}.hero-subtitle {color: var(--text-secondary);margin-bottom: var(--space-lg);padding: 0;animation: fadeInUp 0.6s ease-out 0.1s backwards;}.hero-actions {display: flex;gap: var(--space-md);margin-bottom: 60px;animation: fadeInUp 0.5s ease-out 0.2s backwards;}.user-progress-section {margin-bottom: var(--space-xl);}.section-header {display: flex;justify-content: space-between;align-items: center;margin-bottom: var(--space-md);animation: fadeInUp 0.4s ease-out;}.section-header h2 {margin: 0;text-shadow: 0 0 15px rgba(157, 78, 221, 0.3);}.view-all {color: var(--accent-purple);font-size: var(--fs-md);}.challenge-list {display: flex;flex-direction: column;gap: var(--space-sm);}.challenge-list-item {display: flex;flex-direction: column;padding: var(--space-md) var(--space-lg);padding-top: calc(var(--space-md) + 3px);background: rgba(0, 0, 0, 0.2);border: 1px solid var(--border-color);border-radius: var(--radius-md);text-decoration: none;transition: all 0.3s ease;animation: fadeInUp 0.4s ease-out backwards;}.challenge-list-item:nth-child(1) {animation-delay: 0.05s;}.challenge-list-item:nth-child(2) {animation-delay: 0.1s;}.challenge-list-item:nth-child(3) {animation-delay: 0.15s;}.challenge-list-item:nth-child(4) {animation-delay: 0.2s;}.challenge-list-item:nth-child(5) {animation-delay: 0.25s;}.challenge-list-item:nth-child(n+6) {animation-delay: 0.3s;}.challenge-list-item:hover {border-color: var(--accent-purple);background: rgba(157, 78, 221, 0.05);}.challenge-list-item.solved {border-left: 3px solid var(--success-color);}.challenge-list-item .challenge-top-row {display: flex;justify-content: space-between;align-items: flex-start;}.challenge-list-item .challenge-category {font-size: var(--fs-xs);text-transform: uppercase;letter-spacing: 0.5px;padding: 3px 10px;border-radius: var(--radius-sm);color: #fff;font-weight: 600;}.challenge-list-item .challenge-badges {display: flex;align-items: center;gap: var(--space-sm);margin-top: 2px;}.challenge-list-item .solved-pill {background: rgba(34, 197, 94, 0.25);color: var(--success-color);padding: var(--space-xs) var(--space-sm);border-radius: var(--radius-xl);font-size: var(--fs-sm);font-weight: 700;border: 1px solid rgba(34, 197, 94, 0.4);margin-right: 2px;}.challenge-list-item .challenge-title, .challenge-list-item h4 {color: var(--text-primary);font-weight: 600;margin: var(--space-xs) 0 0 0;font-size: var(--fs-xl);font-family: 'Rajdhani', sans-serif;}.challenge-list-item .challenge-meta {display: flex;justify-content: space-between;align-items: center;font-size: var(--fs-sm);color: var(--text-tertiary);margin-top: 12px;}.category-list {display: flex;flex-direction: column;gap: var(--space-sm);}.category-item {display: flex;align-items: center;gap: var(--space-sm);padding: var(--space-sm);border-radius: var(--radius-md);text-decoration: none;transition: all 0.3s ease;}.category-item:hover {background: rgba(157, 78, 221, 0.1);}.category-item .category-icon {font-size: var(--fs-3xl);}.category-item .category-name {flex: 1;color: var(--text-primary);}.category-item .category-count {padding: var(--space-xs) var(--space-sm);border-radius: var(--radius-sm);font-size: var(--fs-sm);font-weight: 600;}.leaderboard-mini {display: flex;flex-direction: column;gap: var(--space-sm);}.leaderboard-item {display: flex;align-items: center;gap: var(--space-sm);padding: var(--space-sm);border-radius: var(--radius-md);text-decoration: none;transition: all 0.3s ease;}.leaderboard-item:hover {background: rgba(157, 78, 221, 0.1);}.leaderboard-item .rank {font-size: var(--fs-3xl);width: 30px;text-align: center;}.leaderboard-item .player-name {flex: 1;color: var(--text-primary);}.leaderboard-item .player-xp {color: var(--accent-orange);font-weight: 600;}.quick-links {display: flex;flex-direction: column;gap: var(--space-sm);}.quick-link {display: flex;align-items: center;gap: var(--space-sm);padding: var(--space-sm);border-radius: var(--radius-md);color: var(--text-secondary);text-decoration: none;transition: all 0.3s ease;}.quick-link:hover {background: rgba(157, 78, 221, 0.1);color: var(--accent-purple);}.progress-stats {display: grid;grid-template-columns: repeat(4, 1fr);gap: var(--space-md);margin-bottom: var(--space-lg);}.progress-stat {text-align: center;padding: var(--space-md);background: rgba(0, 0, 0, 0.2);border-radius: var(--radius-md);}.progress-value {font-family: 'Rajdhani', sans-serif;font-size: var(--fs-5xl);font-weight: 700;color: var(--accent-orange);}.progress-label {font-size: var(--fs-sm);color: var(--text-tertiary);text-transform: uppercase;}.category-progress h4 {margin-bottom: var(--space-md);color: var(--text-secondary);font-size: var(--fs-md);}.category-bars {display: flex;flex-wrap: wrap;gap: var(--space-sm);}.category-bar {display: flex;align-items: center;gap: var(--space-sm);padding: var(--space-xs) var(--space-sm);background: rgba(0, 0, 0, 0.2);border-radius: var(--radius-sm);font-size: var(--fs-base);}.category-bar .category-name {color: var(--text-secondary);}.announcements-section {margin-bottom: var(--space-xl);animation: fadeInUp 0.4s ease-out;}.announcement {background: linear-gradient(135deg, rgba(157, 78, 221, 0.1) 0%, rgba(255, 107, 53, 0.05) 100%);border: 1px solid rgba(157, 78, 221, 0.3);border-radius: var(--radius-lg);padding: var(--space-lg);margin-bottom: var(--space-md);box-shadow: 0 0 20px rgba(157, 78, 221, 0.1);animation: fadeInUp 0.4s ease-out backwards;}.announcement:nth-child(1) {animation-delay: 0.1s;}.announcement:nth-child(2) {animation-delay: 0.15s;}.announcement:nth-child(3) {animation-delay: 0.2s;}.announcement-pin {margin-right: var(--space-sm);}.announcement-content h4 {color: var(--accent-orange);margin-bottom: var(--space-sm);}.announcement-content p {color: var(--text-secondary);margin: 0;}.announcement-meta {color: var(--text-tertiary);font-size: var(--fs-base);margin-top: var(--space-sm);}.welcome-section {margin-bottom: var(--space-xl);animation: fadeInUp 0.5s ease-out;}.welcome-card {background: linear-gradient(135deg, rgba(34, 197, 94, 0.08) 0%, rgba(157, 78, 221, 0.08) 100%);border: 1px solid rgba(34, 197, 94, 0.3);border-radius: var(--radius-lg);padding: var(--space-xl);box-shadow: 0 0 30px rgba(34, 197, 94, 0.1);}.welcome-card h3 {color: var(--success-color);margin-bottom: var(--space-md);font-size: var(--fs-5xl);}.welcome-card p {color: var(--text-secondary);line-height: 1.7;margin-bottom: var(--space-md);}.welcome-card .category-highlights {list-style: none;padding: 0;margin: var(--space-md) 0;display: grid;grid-template-columns: repeat(3, 1fr);gap: var(--space-sm);}.welcome-card .category-highlights li {padding: var(--space-sm) var(--space-md);background: rgba(0, 0, 0, 0.2);border-radius: var(--radius-sm);color: var(--text-secondary);}.welcome-card .category-highlights li strong {color: var(--accent-purple);}.welcome-card .welcome-reminder {color: var(--text-tertiary);font-size: var(--fs-lg);border-top: 1px solid var(--border-color);padding-top: var(--space-md);margin-bottom: 0;}.content-page {width: 100%;max-width: 1200px;margin: 0 auto;}.content-page h2 {font-size: var(--fs-5xl);margin: var(--space-xl) 0 var(--space-md);display: flex;align-items: center;gap: var(--space-sm);text-shadow: 0 0 15px rgba(157, 78, 221, 0.3);animation: fadeInUp 0.4s ease-out;}.content-page h3 {font-size: var(--fs-3xl);margin: var(--space-lg) 0 var(--space-md);}.content-page p {color: var(--text-secondary);line-height: 1.7;font-size: var(--fs-md);margin-bottom: var(--space-md);}.content-page ol, .content-page ul {color: var(--text-secondary);line-height: 1.7;font-size: var(--fs-md);margin-bottom: var(--space-md);padding-left: var(--space-xl);}.content-page li {margin-bottom: var(--space-sm);}.content-page li strong {color: var(--accent-purple);}.faq-section {margin-bottom: var(--space-xl);}.faq-item {background: rgba(0, 0, 0, 0.2);border: 1px solid var(--border-color);border-radius: var(--radius-md);margin-bottom: var(--space-sm);overflow: hidden;animation: fadeInUp 0.4s ease-out backwards;}.faq-item:nth-child(1) {animation-delay: 0.05s;}.faq-item:nth-child(2) {animation-delay: 0.1s;}.faq-item:nth-child(3) {animation-delay: 0.15s;}.faq-item:nth-child(4) {animation-delay: 0.2s;}.faq-item:nth-child(5) {animation-delay: 0.25s;}.faq-item:nth-child(n+6) {animation-delay: 0.3s;}.faq-question {display: flex;justify-content: space-between;align-items: center;padding: var(--space-md) var(--space-lg);cursor: pointer;color: var(--text-primary);font-weight: 600;transition: all 0.3s ease;}.faq-question:hover {background: rgba(157, 78, 221, 0.1);}.faq-icon {color: var(--accent-purple);transition: transform 0.3s ease;font-size: var(--fs-3xl);}.faq-item.open .faq-icon {transform: rotate(45deg);}.faq-answer {max-height: 0;overflow: hidden;transition: max-height 0.3s ease, padding 0.3s ease;padding: 0 var(--space-lg);color: var(--text-secondary);line-height: 1.6;}.faq-item.open .faq-answer {max-height: 500px;padding: var(--space-md) var(--space-lg) var(--space-lg);}.contact-form {background: var(--card-gradient);border: 1px solid var(--border-color);border-radius: var(--radius-lg);padding: var(--space-xl);margin-bottom: var(--space-xl);box-shadow: 0 0 30px rgba(157, 78, 221, 0.08);}.contact-form h3 {color: var(--accent-purple);margin-bottom: var(--space-lg);}.contact-info {display: grid;grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));gap: var(--space-lg);}.contact-item {background: rgba(0, 0, 0, 0.2);border: 1px solid var(--border-color);border-left: 4px solid var(--accent-purple);border-radius: var(--radius-md);padding: var(--space-lg);}.contact-item h4 {color: var(--text-primary);margin-bottom: var(--space-sm);}.contact-item p {color: var(--text-secondary);font-size: var(--fs-md);margin: 0;}.contribute-card {background: var(--card-gradient);border: 1px solid var(--border-color);border-radius: var(--radius-lg);padding: var(--space-xl);margin-bottom: var(--space-lg);box-shadow: 0 0 30px rgba(157, 78, 221, 0.08);animation: fadeInUp 0.4s ease-out backwards;}.contribute-card:nth-of-type(1) {animation-delay: 0.1s;}.contribute-card:nth-of-type(2) {animation-delay: 0.15s;}.contribute-card:nth-of-type(3) {animation-delay: 0.2s;}.contribute-card:nth-of-type(4) {animation-delay: 0.25s;}.contribute-card:nth-of-type(5) {animation-delay: 0.3s;}.contribute-card h3 {color: var(--accent-purple);margin-bottom: var(--space-md);}.contribute-card p {color: var(--text-secondary);line-height: 1.6;}.contribute-card ul {color: var(--text-secondary);margin-left: var(--space-lg);}.contribute-card li {margin-bottom: var(--space-sm);}.profile-page {max-width: 1000px;margin: 0 auto;}.profile-header {display: flex;gap: var(--space-xl);margin-bottom: var(--space-xl);padding: var(--space-xl);background: var(--card-gradient);border: 1px solid var(--border-color);border-radius: var(--radius-lg);box-shadow: 0 0 30px rgba(157, 78, 221, 0.08);position: relative;}.profile-avatar {width: 120px;height: 120px;border-radius: var(--radius-round);background: linear-gradient(135deg, var(--accent-purple), var(--accent-orange));display: flex;align-items: center;justify-content: center;font-size: var(--fs-8xl);font-weight: 600;color: #fff;flex-shrink: 0;overflow: hidden;box-shadow: 0 0 30px rgba(157, 78, 221, 0.3);}.profile-avatar .avatar-placeholder {font-size: var(--fs-8xl);font-weight: 600;}.profile-avatar img {width: 100%;height: 100%;object-fit: cover;}.profile-info {flex: 1;}.profile-name {font-size: var(--fs-7xl);margin-bottom: var(--space-xs);display: inline-flex;align-items: center;gap: var(--space-sm);}.profile-username {color: var(--text-tertiary);margin-bottom: var(--space-sm);}.profile-level {display: flex;align-items: center;gap: var(--space-sm);margin-top: var(--space-sm);margin-bottom: var(--space-md);}.profile-level .level-badge {background: rgba(157, 78, 221, 0.2);color: var(--accent-purple);padding: 0.25rem 0.6rem;border-radius: var(--radius-sm);font-size: var(--fs-base);font-weight: 600;}.profile-level .xp-points {background: rgba(245, 158, 11, 0.2);color: var(--accent-orange);padding: 0.25rem 0.6rem;border-radius: var(--radius-sm);font-size: var(--fs-base);font-weight: 600;}.profile-bio {color: var(--text-secondary);margin-bottom: var(--space-md);line-height: 1.6;padding: 0;}.profile-links {display: flex;align-items: center;gap: var(--space-md);margin-bottom: var(--space-md);}.profile-link-item {display: inline-flex;align-items: center;gap: 0.25rem;color: var(--text-secondary);}.profile-link {color: var(--accent-purple);text-decoration: none;font-size: var(--fs-md);}.profile-link:hover {text-decoration: underline;}.profile-meta {display: flex;gap: var(--space-lg);color: var(--text-tertiary);font-size: var(--fs-md);padding-top: var(--space-md);border-top: 1px solid var(--border-color);}.profile-actions {position: absolute;top: var(--space-lg);right: var(--space-lg);display: flex;gap: var(--space-sm);}.profile-stats {display: grid;grid-template-columns: repeat(5, 1fr);gap: var(--space-md);margin-bottom: var(--space-xl);}.profile-stats .stat-card {background: var(--card-gradient);border: 1px solid var(--border-color);border-radius: var(--radius-md);padding: var(--space-lg);text-align: center;}.profile-stats .stat-value {font-size: var(--fs-6xl);font-weight: 700;color: var(--accent-orange);margin-bottom: var(--space-xs);}.profile-stats .stat-label {font-size: var(--fs-base);color: var(--text-tertiary);text-transform: uppercase;letter-spacing: 0.5px;}.profile-grid {display: grid;grid-template-columns: 1fr 1fr;gap: var(--space-lg);margin-bottom: var(--space-xl);}.category-breakdown {display: flex;flex-direction: column;gap: var(--space-sm);}.category-row {display: flex;align-items: center;gap: var(--space-md);}.category-row .cat-name {min-width: 100px;color: var(--text-secondary);font-size: var(--fs-md);}.category-row .cat-bar {flex: 1;height: 8px;background: rgba(255, 255, 255, 0.1);border-radius: 4px;overflow: hidden;}.category-row .cat-fill {height: 100%;border-radius: 4px;transition: width 0.3s ease;}.category-row .cat-count {min-width: 30px;text-align: right;color: var(--accent-orange);font-weight: 600;font-size: var(--fs-md);}.solves-table {overflow-x: auto;}.solves-table table {width: 100%;border-collapse: collapse;}.solves-table th {text-align: left;padding: var(--space-sm) var(--space-md);color: var(--text-tertiary);font-size: var(--fs-base);text-transform: uppercase;letter-spacing: 0.5px;border-bottom: 1px solid var(--border-color);}.solves-table td {padding: var(--space-sm) var(--space-md);border-bottom: 1px solid var(--border-color);color: var(--text-secondary);font-size: var(--fs-md);}.solves-table tr:last-child td {border-bottom: none;}.solves-table tr:hover td {background: rgba(157, 78, 221, 0.05);}.solves-table a {color: var(--accent-purple);text-decoration: none;font-size: var(--fs-md);}.solves-table a:hover {text-decoration: underline;}.solves-table .difficulty-stars {font-size: var(--fs-4xl);letter-spacing: 1px;}.badges-grid {display: flex;flex-wrap: wrap;gap: var(--space-md);}.badge-item {display: flex;align-items: center;gap: var(--space-sm);padding: var(--space-sm) var(--space-md);background: rgba(0, 0, 0, 0.2);border-radius: var(--radius-md);cursor: default;transition: background 0.3s ease, transform 0.2s ease;}.badge-item:hover {background: rgba(157, 78, 221, 0.15);transform: translateY(-1px);}.badge-item .badge-icon {font-size: var(--fs-3xl);}.badge-item .badge-name {color: var(--text-primary);font-size: var(--fs-md);}@media (max-width: 900px) {.profile-stats {grid-template-columns: repeat(3, 1fr);}.profile-grid {grid-template-columns: 1fr;}}@media (max-width: 600px) {.profile-stats {grid-template-columns: repeat(2, 1fr);}.profile-header {flex-direction: column;align-items: center;text-align: center;}.profile-actions {position: static;margin-top: var(--space-md);}.profile-links, .profile-meta {justify-content: center;}}.created-challenges-list {display: flex;flex-direction: column;gap: var(--space-xs);}.created-challenge {display: flex;align-items: center;gap: var(--space-md);padding: var(--space-sm) var(--space-md);background: rgba(0, 0, 0, 0.2);border-radius: var(--radius-sm);text-decoration: none;transition: background 0.2s ease;}.created-challenge:hover {background: rgba(157, 78, 221, 0.15);}.created-challenge .category-badge {min-width: 80px;text-align: center;}.created-challenge .ch-title {flex: 1;color: var(--text-primary);font-size: var(--fs-xl);}.created-challenge .ch-xp {color: var(--accent-orange);font-weight: 600;font-size: var(--fs-lg);}.empty-state {text-align: center;padding: 4rem var(--space-xl);color: var(--text-tertiary);}.empty-icon {font-size: 4rem;margin-bottom: var(--space-md);opacity: 0.5;}.empty-state h3 {color: var(--text-secondary);margin-bottom: var(--space-sm);}.empty-state p {margin-bottom: var(--space-lg);}.empty-actions {display: flex;gap: var(--space-md);justify-content: center;flex-wrap: wrap;}.footer {background: var(--footer-bg);padding: var(--space-xl) 0 var(--space-md);margin-top: 1.5rem;border-top: 1px solid var(--accent-purple);background: linear-gradient(135deg, rgba(13, 13, 13, 0.98) 0%, rgba(26, 26, 26, 0.98) 50%, rgba(45, 27, 105, 0.75) 100%);}.footer-content {max-width: 1400px;margin: 0 auto;padding: 0 var(--space-xl);display: flex;flex-wrap: wrap;justify-content: space-between;gap: var(--space-xxl);}.footer-brand {max-width: 250px;text-align: left;}.footer-logo {font-family: 'Rajdhani', sans-serif;font-size: var(--fs-7xl);font-weight: 700;color: var(--accent-purple);text-shadow: 0 0 10px rgba(157, 78, 221, 0.4);padding-left: var(--space-md);}.footer-brand p {color: var(--text-tertiary);font-size: var(--fs-md);margin-top: var(--space-sm);padding-left: var(--space-md);}.footer-links {display: flex;gap: 4rem;flex-wrap: wrap;}.footer-column h4 {color: var(--text-primary);font-size: var(--fs-md);margin-bottom: var(--space-md);text-transform: uppercase;letter-spacing: 1px;padding-bottom: var(--space-sm);position: relative;display: inline-block;}.footer-column h4::after {content: '';position: absolute;bottom: 0;left: 0;width: 20px;height: 1.4px;background: var(--accent-purple);border-radius: 1px;}.footer-column a {display: block;color: var(--text-tertiary);font-size: var(--fs-base);margin-bottom: var(--space-sm);transition: color 0.2s ease, transform 0.2s ease;}.footer-column a::before {content: '›';margin-right: 6px;color: var(--accent-purple);font-size: var(--fs-md);transition: color 0.2s ease;}.footer-column a:hover {color: var(--accent-purple);transform: translateX(2px);}.footer-column a:hover::before {color: var(--accent-purple);}.footer-bottom {max-width: 1800px;margin: var(--space-xl) auto 0;padding: var(--space-md) var(--space-xl) 0;border-top: 1px solid var(--border-color);text-align: center;color: var(--text-tertiary);font-size: var(--fs-base);}@media (max-width: 1024px) {.dashboard-grid {grid-template-columns: 1fr;}.progress-stats {grid-template-columns: repeat(2, 1fr);}}@media (max-width: 768px) {body {padding-top: 60px;}.main-header {height: 60px;padding: var(--space-sm) var(--space-md);}.main-nav {flex-wrap: wrap;}.nav-menu, .nav-auth {display: none;}.welcome-card .category-highlights {grid-template-columns: repeat(2, 1fr);}.mobile-menu-toggle {display: flex;flex-direction: column;gap: 4px;padding: var(--space-sm);background: transparent;border: none;cursor: pointer;}.mobile-menu-toggle span {display: block;width: 24px;height: 2px;background: var(--text-secondary);}.mobile-menu {display: none;position: fixed;top: 60px;left: 0;right: 0;background: rgba(13, 13, 13, 0.98);border-bottom: 1px solid var(--border-color);padding: var(--space-md);z-index: 999;flex-direction: column;gap: var(--space-sm);}.mobile-menu.open {display: flex;}.mobile-menu a {color: var(--text-secondary);padding: 0.75rem var(--space-md);border-radius: var(--radius-md);}.mobile-menu a:hover {background: rgba(157, 78, 221, 0.1);color: var(--accent-purple);}.live-terminal {top: 60px;}.container {padding: var(--space-md);}.filters-bar, .filters-form {flex-direction: column;align-items: stretch;}.filter-group.search-group {max-width: none;}.filter-group {width: 100%;}.filter-group select, .filter-group input {width: 100%;}.challenge-grid, .users-grid {grid-template-columns: 1fr;}.stats-grid {grid-template-columns: repeat(3, 1fr);}.profile-header {flex-direction: column;align-items: center;text-align: center;}.podium {flex-direction: column;align-items: center;}.podium-place.first {transform: none;order: -1;}.footer-content {flex-direction: column;align-items: center;text-align: center;}.footer-links {justify-content: center;gap: var(--space-xl);}.auth-card {padding: var(--space-lg);}.auth-page {padding: var(--space-md);}.scoreboard-filters {flex-wrap: wrap;justify-content: center;}}@media (max-width: 480px) {.stats-grid {grid-template-columns: repeat(2, 1fr);}.category-pills {justify-content: center;}.hero-actions {flex-direction: column;}.progress-stats {grid-template-columns: 1fr;}}.challenge-card-header {display: flex;justify-content: space-between;align-items: flex-start;margin-bottom: var(--space-md);}.challenge-card-header .challenge-badges {display: flex;align-items: center;gap: var(--space-sm);}.challenge-card-header .solved-pill {background: rgba(34, 197, 94, 0.25);color: var(--success-color);padding: var(--space-xs) var(--space-sm);border-radius: var(--radius-xl);font-size: var(--fs-sm);font-weight: 700;border: 1px solid rgba(34, 197, 94, 0.4);}.challenge-category {display: inline-block;padding: var(--space-xs) var(--space-sm);border-radius: var(--radius-sm);font-size: var(--fs-xs);font-weight: 600;text-transform: uppercase;letter-spacing: 0.5px;}.challenge-xp-pill {background: rgba(255, 107, 53, 0.3);color: var(--accent-orange);padding: var(--space-xs) var(--space-sm);border-radius: var(--radius-xl);font-weight: 700;font-size: var(--fs-sm);border: 1px solid rgba(255, 107, 53, 0.4);}.challenge-card-body {flex: 1;}.challenge-card-body .challenge-title {font-size: var(--fs-2xl);margin-bottom: var(--space-sm);}.challenge-card-body .challenge-difficulty {display: flex;align-items: center;gap: var(--space-sm);margin-bottom: var(--space-sm);font-size: var(--fs-xl);}.challenge-card-body .challenge-difficulty .label {color: var(--text-tertiary);font-size: var(--fs-md);}.challenge-card-footer {display: flex;justify-content: space-between;align-items: center;padding-top: var(--space-md);border-top: 1px solid var(--border-color);margin-top: auto;}.challenge-card-footer .challenge-stats {display: flex;gap: var(--space-md);}.challenge-card-footer .stat {display: flex;align-items: center;gap: 4px;font-size: var(--fs-sm);color: var(--text-tertiary);}.challenge-card-footer .stat-icon {font-size: var(--fs-base);}.challenge-card-footer .challenge-author {font-size: var(--fs-xs);color: var(--text-tertiary);}.challenge-card-footer .challenge-author a {color: var(--accent-purple);}.challenge-tags .tag {display: inline-block;padding: 2px 6px;background: rgba(157, 78, 221, 0.1);border-radius: var(--radius-sm);font-size: var(--fs-xs);color: var(--text-tertiary);margin-right: var(--space-xs);}.toggle-label {display: flex;align-items: center;gap: var(--space-sm);color: var(--text-primary);font-size: var(--fs-base);cursor: pointer;height: 42px;text-transform: uppercase;letter-spacing: 0.5px;}.toggle-label input[type="checkbox"] {width: 18px;height: 18px;appearance: none;-webkit-appearance: none;background: rgba(0, 0, 0, 0.5);border: 1px solid var(--border-color);border-radius: 4px;position: relative;cursor: pointer;transition: all 0.2s ease;}.toggle-label input[type="checkbox"]:hover {border-color: var(--accent-purple);}.toggle-label input[type="checkbox"]:checked {background: var(--accent-purple);border-color: var(--accent-purple);}.toggle-label input[type="checkbox"]:checked::after {content: '✓';position: absolute;top: 50%;left: 50%;transform: translate(-50%, -50%);color: white;font-size: var(--fs-2xs);font-weight: bold;}.sort-pills {display: flex;gap: var(--space-sm);margin-left: auto;}.your-rank-banner {display: flex;align-items: center;gap: var(--space-lg);padding: var(--space-md) var(--space-xl);background: linear-gradient(135deg, rgba(157, 78, 221, 0.15) 0%, rgba(255, 107, 53, 0.1) 100%);border: 1px solid rgba(157, 78, 221, 0.3);border-radius: var(--radius-lg);margin-bottom: var(--space-xl);max-width: 740px;margin-left: auto;margin-right: auto;}.your-rank-banner .rank-label {color: var(--text-secondary);}.your-rank-banner .rank-value {font-family: 'Rajdhani', sans-serif;font-size: var(--fs-5xl);font-weight: 700;color: var(--accent-purple);}.your-rank-banner .rank-xp {color: var(--accent-orange);font-weight: 600;margin-left: auto;}.podium-score {color: var(--accent-orange);font-weight: 700;font-family: 'Rajdhani', sans-serif;font-size: var(--fs-3xl);margin-bottom: var(--space-xs);}.scoreboard-container {margin-bottom: var(--space-xl);}.hero-brand-title {font-family: 'Rajdhani', sans-serif;font-size: 4rem;font-weight: 700;text-align: center;margin-bottom: var(--space-md);background: linear-gradient(135deg, var(--accent-purple) 0%, #b366e8 50%, var(--accent-orange) 100%);-webkit-background-clip: text;-webkit-text-fill-color: transparent;background-clip: text;text-shadow: none;filter: drop-shadow(0 0 30px rgba(157, 78, 221, 0.5));animation: glitchIn 0.8s ease-out, glow-pulse 3s ease-in-out 0.8s infinite alternate;margin-top: var(--space-lg);}@keyframes glow-pulse {from {filter: drop-shadow(0 0 20px rgba(157, 78, 221, 0.4));}to {filter: drop-shadow(0 0 40px rgba(157, 78, 221, 0.7));}}.hero-tagline {text-align: center;color: var(--text-secondary);font-size: var(--fs-xl);margin-top: -10px;margin-bottom: 40px;animation: fadeInUp 0.6s ease-out 0.2s backwards;}.btn-block {width: 100%;}.spoiler {background: var(--text-tertiary);color: transparent;cursor: pointer;border-radius: var(--radius-sm);transition: all 0.3s ease;user-select: none;}.spoiler:hover::before {content: 'Click to reveal';position: absolute;font-size: var(--fs-xs);color: var(--text-primary);}.spoiler:not(.spoiler) {background: transparent;color: inherit;}.comment-form {margin-bottom: var(--space-lg);padding-bottom: var(--space-lg);border-bottom: 1px solid var(--border-color);}.comment-form textarea {width: 100%;min-height: 80px;margin-bottom: var(--space-sm);padding: 0.75rem 1rem;background: rgba(0, 0, 0, 0.5);border: 1px solid var(--border-color);border-radius: var(--radius-md);color: var(--text-primary);font-size: var(--fs-lg);font-family: inherit;resize: vertical;transition: border-color 0.3s ease, box-shadow 0.3s ease;}.comment-form textarea:focus {outline: none;border-color: var(--accent-purple);box-shadow: 0 0 0 3px rgba(157, 78, 221, 0.2);}.comment-form textarea::placeholder {color: var(--text-tertiary);}.comment-form-footer {display: flex;justify-content: space-between;align-items: center;}.comment-warning {color: var(--warning-color);font-size: var(--fs-sm);}.text-center {text-align: center;}.text-muted {color: var(--text-tertiary);}.success-message {color: var(--success-color);}.settings-page {max-width: 800px;margin: 0 auto;width: 100%;}.settings-page .page-header {margin-bottom: var(--space-lg);text-align: center;}.settings-page .page-header h1 {margin-bottom: 0;}.settings-tabs {display: flex;justify-content: center;gap: var(--space-sm);margin-bottom: var(--space-xl);padding-bottom: var(--space-md);border-bottom: 1px solid var(--border-color);}.settings-tabs a {padding: var(--space-sm) var(--space-lg);color: var(--text-secondary);text-decoration: none;border-radius: var(--radius-md);transition: all 0.2s ease;min-width: 130px;text-align: center;}.settings-tabs a:hover {color: var(--text-primary);background: rgba(157, 78, 221, 0.1);}.settings-tabs a.active {color: var(--accent-purple);background: rgba(157, 78, 221, 0.15);font-weight: 600;}.settings-page .panel {margin-bottom: var(--space-xl);}.settings-page .alert {margin-bottom: var(--space-lg);}.avatar-section {display: flex;align-items: center;gap: var(--space-xl);}.avatar-preview {width: 80px;height: 80px;border-radius: 50%;overflow: hidden;flex-shrink: 0;background: linear-gradient(135deg, var(--accent-purple), var(--accent-orange));display: flex;align-items: center;justify-content: center;}.avatar-preview img {width: 100%;height: 100%;object-fit: cover;}.avatar-placeholder {font-size: var(--fs-7xl);font-weight: 700;color: #fff;}.avatar-actions {display: flex;flex-wrap: wrap;align-items: center;gap: var(--space-sm);}.avatar-hint {font-size: var(--fs-base);color: var(--text-tertiary);margin: 0;width: 100%;margin-top: var(--space-xs);}.country-selector {position: relative;}.selected-country {display: flex;align-items: center;gap: var(--space-sm);padding: 0.6rem 1rem;background: #1a1a2e;border: 1px solid var(--border-color);border-radius: var(--radius-md);cursor: pointer;transition: border-color 0.2s ease;}.selected-country:hover {border-color: var(--accent-purple);}.selected-country .dropdown-arrow {margin-left: auto;font-size: var(--fs-xs);color: var(--text-tertiary);}.country-flag {width: 24px;height: 16px;object-fit: cover;border-radius: 2px;}.country-dropdown {position: absolute;top: calc(100% + 4px);left: 0;right: 0;max-height: 300px;background: #1a1a2e;border: 1px solid var(--border-color);border-radius: var(--radius-md);box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);z-index: 100;display: none;overflow: hidden;}.country-dropdown.open {display: block;}.country-search {padding: var(--space-sm);border-bottom: 1px solid var(--border-color);background: #1a1a2e;}.country-search input {width: 100%;padding: 0.5rem;background: #252540;border: 1px solid var(--border-color);border-radius: var(--radius-sm);color: var(--text-primary);}.country-options {max-height: 250px;overflow-y: auto;background: #1a1a2e;}.country-option {display: flex;align-items: center;gap: var(--space-sm);padding: 0.6rem var(--space-md);cursor: pointer;transition: background 0.2s ease;background: #1a1a2e;}.country-option:hover {background: #2d2d4a;}.country-option .country-name {color: var(--text-primary);}.form-row {display: grid;grid-template-columns: 1fr 1fr;gap: var(--space-lg);}@media (max-width: 600px) {.form-row {grid-template-columns: 1fr;}}.notification-group {margin-bottom: var(--space-xl);}.notification-group h4 {color: var(--accent-orange);margin-bottom: var(--space-md);font-size: var(--fs-xl);}.checkbox-row {display: flex;align-items: flex-start;gap: var(--space-md);padding: var(--space-md);margin-bottom: var(--space-sm);background: rgba(0, 0, 0, 0.2);border-radius: var(--radius-md);cursor: pointer;transition: background 0.2s ease;}.checkbox-row:hover {background: rgba(157, 78, 221, 0.1);}.checkbox-row input[type="checkbox"] {width: 20px;height: 20px;margin-top: 2px;flex-shrink: 0;accent-color: var(--accent-purple);appearance: none;-webkit-appearance: none;background: rgba(0, 0, 0, 0.5);border: 1px solid var(--border-color);border-radius: 4px;position: relative;cursor: pointer;transition: all 0.2s ease;}.checkbox-row input[type="checkbox"]:hover {border-color: var(--accent-purple);}.checkbox-row input[type="checkbox"]:checked {background: var(--accent-purple);border-color: var(--accent-purple);}.checkbox-row input[type="checkbox"]:checked::after {content: '✓';position: absolute;top: 50%;left: 50%;transform: translate(-50%, -50%);color: white;font-size: var(--fs-xs);font-weight: bold;}.checkbox-content {display: flex;flex-direction: column;gap: 2px;}.checkbox-title {font-weight: 600;color: var(--text-primary);}.checkbox-desc {font-size: var(--fs-base);color: var(--text-tertiary);}.info-list {display: flex;flex-direction: column;gap: var(--space-sm);}.info-row {display: flex;justify-content: space-between;align-items: center;padding: var(--space-md) 0;border-bottom: 1px solid var(--border-color);}.info-row:last-child {border-bottom: none;}.info-label {color: var(--text-secondary);font-size: var(--fs-md);}.info-value {color: var(--text-primary);font-weight: 500;font-size: var(--fs-md);}.badge {padding: 0.25rem 0.75rem;border-radius: var(--radius-sm);font-size: var(--fs-sm);font-weight: 600;}.badge-success {background: rgba(34, 197, 94, 0.2);color: var(--success-color);}.badge-warning {background: rgba(245, 158, 11, 0.2);color: var(--warning-color);}.admin-nav {background: rgba(0, 0, 0, 0.3);border-bottom: 1px solid var(--border-color);margin-bottom: var(--space-xl);padding: 0 var(--space-lg);}.admin-nav-links {display: flex;justify-content: center;flex-wrap: wrap;gap: 0;max-width: 1400px;margin: 0 auto;}.admin-nav-links a {padding: var(--space-md) var(--space-md);color: var(--text-secondary);text-decoration: none;font-size: var(--fs-sm);border-bottom: 2px solid transparent;transition: all 0.2s;white-space: nowrap;}.admin-nav-links a:hover {color: var(--text-primary);background: rgba(157, 78, 221, 0.1);}.admin-nav-links a.active {color: var(--accent-purple);border-bottom-color: var(--accent-purple);background: rgba(157, 78, 221, 0.1);}.admin-nav-links a.admin-nav-danger {color: var(--error-color);}.admin-nav-links a.admin-nav-danger:hover {background: rgba(239, 68, 68, 0.1);}.admin-nav-links a.admin-nav-danger.active {color: var(--error-color);border-bottom-color: var(--error-color);background: rgba(239, 68, 68, 0.1);}.admin-dashboard {max-width: 1400px;margin: 0 auto;padding: 0 var(--space-lg);}.admin-dashboard .page-header {text-align: center;margin-bottom: var(--space-xl);padding-bottom: var(--space-lg);border-bottom: 1px solid var(--border-color);}.admin-dashboard .page-header h1 {font-family: 'Rajdhani', sans-serif;font-size: clamp(var(--fs-6xl), 4vw, var(--fs-8xl));font-weight: 700;color: transparent;background: linear-gradient(135deg, #ffffff 0%, var(--accent-purple) 50%, var(--accent-orange) 100%);background-size: 200% 200%;-webkit-background-clip: text;background-clip: text;animation: elegantGradient 8s ease-in-out infinite;filter: drop-shadow(0 0 15px rgba(157, 78, 221, 0.3));}.admin-stats {display: grid;grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));gap: var(--space-lg);margin-bottom: var(--space-xl);}.admin-stats .stat-card {background: linear-gradient(135deg, rgba(157, 78, 221, 0.1) 0%, rgba(255, 107, 53, 0.05) 100%);border: 1px solid rgba(157, 78, 221, 0.2);border-radius: var(--radius-lg);padding: var(--space-xl);text-align: center;transition: all 0.3s ease;}.admin-stats .stat-card:hover {transform: translateY(-2px);box-shadow: 0 10px 30px rgba(157, 78, 221, 0.2);}.admin-stats .stat-card.highlight {border-color: var(--warning-color);box-shadow: 0 0 20px rgba(245, 158, 11, 0.2);}.admin-stats .stat-value {font-size: var(--fs-8xl);font-weight: 700;color: var(--accent-purple);line-height: 1;margin-bottom: var(--space-sm);}.admin-stats .stat-label {color: var(--text-secondary);font-size: var(--fs-md);text-transform: uppercase;letter-spacing: 1px;}.admin-grid {display: grid;grid-template-columns: 1fr 1fr;gap: var(--space-xl);}@media (max-width: 900px) {.admin-grid {grid-template-columns: 1fr;}}.admin-section {background: rgba(0, 0, 0, 0.2);border: 1px solid var(--border-color);border-radius: var(--radius-lg);padding: var(--space-lg);}.admin-section h3 {color: var(--accent-orange);margin-bottom: var(--space-lg);font-size: var(--fs-2xl);text-transform: uppercase;letter-spacing: 1px;}.quick-actions {display: grid;grid-template-columns: repeat(2, 1fr);gap: var(--space-md);}.action-card {display: flex;align-items: center;gap: var(--space-md);padding: var(--space-md);background: rgba(157, 78, 221, 0.05);border: 1px solid var(--border-color);border-radius: var(--radius-md);color: var(--text-primary);text-decoration: none;transition: all 0.2s;}.action-card:hover {background: rgba(157, 78, 221, 0.15);border-color: var(--accent-purple);transform: translateX(3px);}.action-card .icon {font-size: var(--fs-5xl);}.action-card .label {font-weight: 500;}.action-card .badge {margin-left: auto;background: var(--error-color);color: white;padding: 0.2rem 0.5rem;border-radius: var(--radius-sm);font-size: var(--fs-xs);font-weight: 600;}.action-card--danger {background: rgba(239, 68, 68, 0.05);border-color: rgba(239, 68, 68, 0.3);}.action-card--danger:hover {background: rgba(239, 68, 68, 0.15);border-color: var(--error-color);}.activity-log {max-height: 400px;overflow-y: auto;padding-right: var(--space-sm);}.activity-item {display: flex;align-items: center;gap: var(--space-md);padding: var(--space-sm) 0;padding-right: 1rem;border-bottom: 1px solid var(--border-color);font-size: var(--fs-md);}.activity-item:last-child {border-bottom: none;}.activity-action {color: var(--accent-purple);font-weight: 500;flex-shrink: 0;}.activity-user {color: var(--text-secondary);}.activity-time {margin-left: auto;color: var(--text-tertiary);font-size: var(--fs-sm);flex-shrink: 0;white-space: nowrap;}.admin-page {max-width: 1400px;width: 100%;margin: 0 auto;padding: 0 var(--space-lg);}.admin-page--wide {max-width: 1600px;}.admin-page > .panel, .admin-page > .admin-filters, .admin-page > div > .panel {width: 100%;}.admin-page .panel {width: 100%;}.admin-page > .panel + .panel, .admin-page .content > .panel + .panel {margin-top: var(--space-xl);}.admin-page .admin-grid > .panel, .admin-page .danger-zone-grid > .panel {margin-top: 0;}.admin-page .panel-body {min-height: 200px;}.admin-page .empty-state {width: 100%;padding: var(--space-xxl) var(--space-lg);}.admin-content-wrapper {width: 100%;min-width: 800px;}.admin-content-wrapper > .admin-filters, .admin-content-wrapper > .panel {width: 100%;}.admin-page .page-header {text-align: center;margin-bottom: var(--space-xl);padding-bottom: var(--space-lg);border-bottom: 1px solid var(--border-color);}.admin-page .page-header h1 {font-family: 'Rajdhani', sans-serif;font-size: clamp(var(--fs-6xl), 4vw, var(--fs-8xl));font-weight: 700;color: transparent;background: linear-gradient(135deg, #ffffff 0%, var(--accent-purple) 50%, var(--accent-orange) 100%);background-size: 200% 200%;-webkit-background-clip: text;background-clip: text;animation: elegantGradient 8s ease-in-out infinite;filter: drop-shadow(0 0 15px rgba(157, 78, 221, 0.3));}.admin-page .page-header p {color: var(--text-secondary);margin-top: var(--space-sm);}.admin-table-wrapper {background: rgba(0, 0, 0, 0.2);border: 1px solid var(--border-color);border-radius: var(--radius-lg);overflow-x: auto;}.admin-table {width: 100%;border-collapse: collapse;}.admin-table th, .admin-table td {padding: var(--space-md);text-align: left;border-bottom: 1px solid var(--border-color);}.admin-table th {background: rgba(157, 78, 221, 0.1);color: var(--text-secondary);font-weight: 500;text-transform: uppercase;font-size: var(--fs-sm);letter-spacing: 0.5px;white-space: nowrap;}.admin-table tbody tr:hover {background: rgba(157, 78, 221, 0.05);}.admin-table .actions-cell {white-space: nowrap;display: flex;gap: 0.35rem;align-items: center;}.admin-table .actions-cell form {display: inline-flex;margin: 0;}.admin-table .actions-cell .btn {min-height: 32px;min-width: 75px;display: inline-flex;align-items: center;justify-content: center;padding: 0.35rem 0.75rem;font-size: var(--fs-sm);}.admin-filters {background: rgba(0, 0, 0, 0.2);border: 1px solid var(--border-color);border-radius: var(--radius-lg);padding: var(--space-lg);margin-bottom: var(--space-xl);display: flex;flex-wrap: wrap;gap: var(--space-md);align-items: center;justify-content: center;width: 100%;box-sizing: border-box;}.admin-filters .filter-pills {display: flex;gap: var(--space-xs);flex-wrap: wrap;justify-content: center;}.admin-filters .filter-pill {padding: var(--space-xs) var(--space-md);background: transparent;border: 1px solid var(--border-color);border-radius: var(--radius-sm);color: var(--text-secondary);text-decoration: none;font-size: var(--fs-base);transition: all 0.2s;}.admin-filters .filter-pill:hover {border-color: var(--accent-purple);color: var(--accent-purple);}.admin-filters .filter-pill.active {background: var(--accent-purple);border-color: var(--accent-purple);color: white;}.admin-filters .search-form {display: flex;gap: var(--space-sm);margin-left: auto;}.admin-filters .search-form .form-control {min-width: 200px;height: 38px;padding: 0.5rem 1rem;background: var(--bg-input);border: 1px solid var(--border-color);border-radius: var(--radius-md);font-size: var(--fs-md);}.admin-filters .search-form .btn {height: 38px;}.challenge-form .form-grid {display: grid;grid-template-columns: 1fr 300px;gap: var(--space-xl);align-items: start;}.challenge-form .form-main {display: flex;flex-direction: column;gap: var(--space-lg);}.challenge-form .form-main > .panel {margin-bottom: 0;}.challenge-form .form-sidebar {position: sticky;top: var(--space-lg);}@media (max-width: 900px) {.challenge-form .form-grid {grid-template-columns: 1fr;}.challenge-form .form-sidebar {position: static;}}.role-select {padding: 0.35rem 0.5rem;font-size: var(--fs-sm);border-radius: var(--radius-sm);background: var(--bg-tertiary);border: 1px solid var(--text-tertiary);color: var(--text-primary);cursor: pointer;min-width: 80px;}.role-select option {background: var(--bg-secondary);color: var(--text-primary);}.role-select:focus {outline: none;border-color: var(--accent-purple);}.status-badge {padding: 0.2rem 0.6rem;border-radius: var(--radius-sm);font-size: var(--fs-xs);font-weight: 600;text-transform: uppercase;}.status-active {background: rgba(34, 197, 94, 0.2);color: var(--success-color);}.status-inactive {background: rgba(239, 68, 68, 0.2);color: var(--error-color);}.status-pending {background: rgba(245, 158, 11, 0.2);color: var(--warning-color);}.status-unverified {background: rgba(107, 114, 128, 0.2);color: var(--text-tertiary);}.role-badge {padding: 0.2rem 0.6rem;border-radius: var(--radius-sm);font-size: var(--fs-xs);font-weight: 600;text-transform: capitalize;}.role-admin {background: rgba(239, 68, 68, 0.2);color: var(--error-color);}.role-moderator {background: rgba(245, 158, 11, 0.2);color: var(--warning-color);}.role-contributor {background: rgba(34, 197, 94, 0.2);color: var(--success-color);}.role-player {background: rgba(157, 78, 221, 0.2);color: var(--accent-purple);}.admin-settings {max-width: 800px;margin: 0 auto;}.settings-section {background: rgba(0, 0, 0, 0.2);border: 1px solid var(--border-color);border-radius: var(--radius-lg);padding: var(--space-xl);margin-bottom: var(--space-xl);}.settings-section h3 {color: var(--accent-orange);margin-bottom: var(--space-lg);padding-bottom: var(--space-md);border-bottom: 1px solid var(--border-color);}.setting-row {display: flex;justify-content: space-between;align-items: center;padding: var(--space-md) 0;border-bottom: 1px solid rgba(255, 255, 255, 0.05);}.setting-row:last-child {border-bottom: none;}.setting-info h4 {color: var(--text-primary);margin-bottom: var(--space-xs);}.setting-info p {color: var(--text-tertiary);font-size: var(--fs-base);margin: 0;}.setting-value {color: var(--accent-purple);font-family: 'JetBrains Mono', monospace;font-size: var(--fs-md);}.pagination {display: flex;align-items: center;justify-content: center;gap: var(--space-md);margin-top: var(--space-xl);padding: var(--space-lg);background: rgba(0, 0, 0, 0.2);border: 1px solid var(--border-color);border-radius: var(--radius-lg);}.pagination-btn {padding: var(--space-sm) var(--space-lg);background: var(--bg-tertiary);border: 1px solid var(--border-color);border-radius: var(--radius-md);color: var(--text-primary);text-decoration: none;font-size: var(--fs-md);transition: all 0.2s ease;}.pagination-btn:hover {background: var(--accent-purple);border-color: var(--accent-purple);color: white;}.pagination-info {color: var(--text-secondary);font-size: var(--fs-md);}.pagination-numbers {display: flex;gap: var(--space-xs);}.pagination-numbers a, .pagination-numbers span {padding: var(--space-xs) var(--space-sm);border-radius: var(--radius-sm);font-size: var(--fs-base);min-width: 32px;text-align: center;}.pagination-numbers a {background: var(--bg-tertiary);color: var(--text-secondary);text-decoration: none;border: 1px solid var(--border-color);}.pagination-numbers a:hover {background: var(--accent-purple);color: white;border-color: var(--accent-purple);}.pagination-numbers .current {background: var(--accent-purple);color: white;}.filter-tabs {display: flex;gap: var(--space-sm);margin-bottom: var(--space-lg);border-bottom: 1px solid var(--border-color);flex-wrap: wrap;justify-content: center;}.filter-tab {padding: var(--space-sm) var(--space-lg);color: var(--text-secondary);text-decoration: none;border-bottom: 2px solid transparent;transition: all 0.2s;font-size: var(--fs-md);}.filter-tab:hover {color: var(--text-primary);background: rgba(157, 78, 221, 0.1);}.filter-tab.active {color: var(--accent-purple);border-bottom-color: var(--accent-purple);background: rgba(157, 78, 221, 0.1);}.badge-danger {background: rgba(239, 68, 68, 0.2);color: #ef4444;}.badge-secondary {background: rgba(107, 114, 128, 0.2);color: #9ca3af;}.info-box {background: rgba(59, 130, 246, 0.1);border: 1px solid rgba(59, 130, 246, 0.3);border-radius: var(--radius-md);padding: var(--space-lg);margin-top: var(--space-xl);}.info-box h4 {color: var(--text-primary);margin-bottom: var(--space-md);font-size: var(--fs-xl);}.info-box ul {list-style: disc;margin-left: var(--space-xl);color: var(--text-secondary);}.info-box li {margin-bottom: var(--space-sm);font-size: var(--fs-md);}.info-box p {margin-top: var(--space-md);color: var(--text-secondary);font-size: var(--fs-md);}.table-responsive {background: rgba(0, 0, 0, 0.2);border: 1px solid var(--border-color);border-radius: var(--radius-lg);overflow-x: auto;margin-bottom: var(--space-lg);}.data-table {width: 100%;border-collapse: collapse;table-layout: auto;}.data-table th, .data-table td {padding: var(--space-sm) var(--space-md);text-align: left;border-bottom: 1px solid var(--border-color);vertical-align: middle;font-size: var(--fs-base);}.data-table th {background: rgba(157, 78, 221, 0.1);color: var(--text-secondary);font-weight: 500;text-transform: uppercase;font-size: var(--fs-xs);letter-spacing: 0.5px;white-space: nowrap;}.data-table tbody tr:hover {background: rgba(157, 78, 221, 0.05);}.data-table tbody tr:last-child td {border-bottom: none;}.data-table .table-actions {white-space: nowrap;text-align: center;}.data-table .table-actions form {display: inline-flex;margin: 0;justify-content: center;}.data-table .table-actions .btn {margin: 0 auto;}.data-table .challenge-title {font-size: var(--fs-lg);}.data-table .challenge-title strong, .data-table td > strong {color: var(--text-primary);font-weight: 500;}.data-table .actions-cell {white-space: nowrap;}.data-table .actions-cell .btn {min-width: 60px;}.data-table td code {background: rgba(0, 0, 0, 0.3);padding: 0.2rem 0.5rem;border-radius: var(--radius-sm);font-size: var(--fs-base);display: inline-block;max-width: 250px;overflow: hidden;text-overflow: ellipsis;white-space: nowrap;vertical-align: middle;}.data-table td small {display: block;color: var(--text-tertiary);font-size: var(--fs-sm);margin-top: 0.25rem;max-width: 250px;overflow: hidden;text-overflow: ellipsis;white-space: nowrap;}.data-table th:first-child, .data-table td:first-child {min-width: 120px;}.data-table .badge {font-size: var(--fs-xs);padding: 0.25rem 0.6rem;}.challenge-form .form-actions {margin-top: var(--space-xl);padding-top: var(--space-lg);border-top: 1px solid var(--border-color);display: flex;gap: var(--space-md);align-items: center;}.panel-header h3 {margin: 0;color: var(--accent-orange);font-size: var(--fs-xl);text-transform: uppercase;letter-spacing: 0.5px;font-weight: 600;}.admin-section > h3 {color: var(--accent-orange);margin-bottom: var(--space-lg);font-size: var(--fs-xl);text-transform: uppercase;letter-spacing: 0.5px;font-weight: 600;}.admin-dashboard > .admin-grid {margin-bottom: var(--space-xl);}.admin-dashboard > .admin-section, .admin-dashboard > .panel, .admin-dashboard > .info-box {margin-bottom: var(--space-xl);}.admin-dashboard > *:last-child {margin-bottom: 0;}.report-issue-link {display: inline-block;color: var(--text-secondary);text-decoration: none;font-size: var(--fs-md);transition: color 0.2s;}.report-issue-link:hover {color: var(--warning);}.comment-captcha {display: flex;align-items: center;gap: 0.5rem;margin: 0.75rem 0;padding: 0.5rem 0.75rem;background: var(--bg-input);border-radius: var(--radius-sm);font-family: 'Fira Code', monospace;font-size: var(--fs-md);}.comment-captcha .captcha-label {color: var(--text-secondary);margin-right: 0.25rem;}.comment-captcha .captcha-num {color: var(--accent);font-weight: 600;}.comment-captcha .captcha-op, .comment-captcha .captcha-eq {color: var(--text-tertiary);}.comment-captcha .captcha-input {width: 50px;padding: 0.25rem 0.5rem;background: var(--card-bg);border: 1px solid var(--border-color);border-radius: var(--radius-sm);color: var(--text-primary);font-family: 'Fira Code', monospace;font-size: var(--fs-md);text-align: center;}.comment-captcha .captcha-input:focus {outline: none;border-color: var(--accent);}.comment-captcha .captcha-input::-webkit-outer-spin-button, .comment-captcha .captcha-input::-webkit-inner-spin-button {-webkit-appearance: none;margin: 0;}.comment-captcha .captcha-input[type=number] {-moz-appearance: textfield;}.comment-header {display: flex;align-items: center;gap: 0.5rem;flex-wrap: wrap;}.comment-actions {margin-left: auto;display: flex;gap: 0.25rem;}.comment-action-btn {background: none;border: none;cursor: pointer;font-size: var(--fs-base);opacity: 0.5;transition: opacity 0.2s;padding: 0.15rem 0.3rem;text-decoration: none;color: inherit;}.comment:hover .comment-action-btn {opacity: 1;}.comment-action-btn:hover {opacity: 1;}.solver-badge-sm {color: var(--success);font-size: var(--fs-sm);font-weight: 600;}.edited-badge {color: var(--text-tertiary);font-size: var(--fs-sm);font-style: italic;}.comment-footer {margin-top: 0.5rem;}.reply-btn {background: none;border: none;color: var(--text-secondary);font-size: var(--fs-sm);cursor: pointer;padding: 0;}.reply-btn:hover {color: var(--accent);}.comment-replies {margin-left: 1.5rem;padding-left: 1rem;border-left: 2px solid var(--border-color);margin-top: 0.75rem;}.comment-replies .comment {padding: 0.75rem 0;background: transparent;border-radius: 0;}.comment-replies .comment:not(:last-child) {border-bottom: 1px solid var(--border-color);}.reply-indicator {display: flex;align-items: center;gap: 0.5rem;padding: 0.5rem 0.75rem;background: var(--bg-input);border-radius: var(--radius-sm);font-size: var(--fs-base);color: var(--text-secondary);margin-bottom: 0.5rem;}.cancel-reply {background: none;border: none;color: var(--text-tertiary);cursor: pointer;font-size: var(--fs-md);margin-left: auto;}.cancel-reply:hover {color: var(--danger);}.comment-edit-form {margin-top: 0.5rem;}.comment-edit-form .edit-textarea {width: 100%;min-height: 80px;padding: 0.75rem;background: var(--bg-input);border: 1px solid var(--border-color);border-radius: var(--radius-sm);color: var(--text-primary);font-family: inherit;font-size: var(--fs-md);resize: vertical;}.comment-edit-form .edit-textarea:focus {outline: none;border-color: var(--accent);}.comment-edit-form .edit-actions {display: flex;gap: 0.5rem;margin-top: 0.5rem;}