:root{--bg-deepest: #050810;--bg-base: #0a0e1a;--bg-surface: #111627;--bg-elevated: #181e33;--bg-card: #1a2035;--bg-hover: #222842;--text-primary: #e8ecf4;--text-secondary: #8b93a8;--text-muted: #555d74;--text-accent: #00e5ff;--gradient-primary: linear-gradient(135deg, #00e5ff, #7c4dff);--gradient-warm: linear-gradient(135deg, #ff6b6b, #ffa726);--gradient-success: linear-gradient(135deg, #00e676, #00bfa5);--gradient-gold: linear-gradient(135deg, #ffd740, #ff9100);--gradient-hero: linear-gradient(135deg, #0a0e1a 0%, #0d1530 40%, #1a0a2e 100%);--accent-cyan: #00e5ff;--accent-purple: #7c4dff;--accent-blue: #448aff;--accent-green: #00e676;--accent-orange: #ffa726;--accent-red: #ff5252;--accent-gold: #ffd740;--easy: #00e676;--medium: #ffa726;--hard: #ff5252;--cat-digital: #00e5ff;--cat-verilog: #7c4dff;--cat-systemverilog: #ff4081;--cat-uvm: #ffd740;--border-subtle: rgba(255, 255, 255, .06);--border-default: rgba(255, 255, 255, .1);--border-accent: rgba(0, 229, 255, .3);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .3);--shadow-md: 0 4px 16px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .5);--shadow-glow-cyan: 0 0 20px rgba(0, 229, 255, .15);--shadow-glow-purple: 0 0 20px rgba(124, 77, 255, .15);--glass-bg: rgba(17, 22, 39, .7);--glass-border: rgba(255, 255, 255, .08);--glass-blur: 16px;--space-xs: 4px;--space-sm: 8px;--space-md: 16px;--space-lg: 24px;--space-xl: 32px;--space-2xl: 48px;--space-3xl: 64px;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--radius-xl: 24px;--radius-full: 9999px;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-mono: "JetBrains Mono", "Fira Code", "Cascadia Code", monospace;--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-normal: .25s cubic-bezier(.4, 0, .2, 1);--transition-slow: .4s cubic-bezier(.4, 0, .2, 1);--navbar-height: 64px;--sidebar-width: 280px;--max-width: 1400px}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-sans);background:var(--bg-deepest);color:var(--text-primary);line-height:1.6;min-height:100vh;overflow-x:hidden}a{color:var(--accent-cyan);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--accent-purple)}button{font-family:var(--font-sans);cursor:pointer;border:none;outline:none;background:none;color:var(--text-primary)}input,select,textarea{font-family:var(--font-sans);background:var(--bg-surface);color:var(--text-primary);border:1px solid var(--border-default);border-radius:var(--radius-sm);padding:var(--space-sm) var(--space-md);outline:none;transition:border-color var(--transition-fast)}input:focus,select:focus,textarea:focus{border-color:var(--accent-cyan)}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-deepest)}::-webkit-scrollbar-thumb{background:var(--bg-hover);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.app{min-height:100vh;display:flex;flex-direction:column}.main-content{flex:1;padding-top:var(--navbar-height)}.navbar{position:fixed;top:0;left:0;right:0;height:var(--navbar-height);background:#050810d9;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border-subtle);z-index:1000;display:flex;align-items:center;padding:0 var(--space-xl)}.navbar-inner{width:100%;max-width:var(--max-width);margin:0 auto;display:flex;align-items:center;justify-content:space-between}.navbar-logo{display:flex;align-items:center;gap:var(--space-sm);font-size:1.25rem;font-weight:800;letter-spacing:-.02em;color:var(--text-primary);text-decoration:none}.navbar-logo .logo-icon{width:32px;height:32px;background:var(--gradient-primary);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:.9rem}.navbar-logo .logo-accent{background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.navbar-links{display:flex;align-items:center;gap:var(--space-xs);list-style:none}.navbar-links a{display:flex;align-items:center;gap:var(--space-xs);padding:var(--space-sm) var(--space-md);color:var(--text-secondary);font-size:.875rem;font-weight:500;border-radius:var(--radius-sm);transition:all var(--transition-fast)}.navbar-links a:hover,.navbar-links a.active{color:var(--text-primary);background:var(--bg-hover)}.navbar-links a.active{color:var(--accent-cyan)}.navbar-right{display:flex;align-items:center;gap:var(--space-md)}.streak-badge{display:flex;align-items:center;gap:var(--space-xs);padding:var(--space-xs) var(--space-sm);background:#ff572226;border:1px solid rgba(255,87,34,.3);border-radius:var(--radius-full);font-size:.8rem;font-weight:600;color:#ff6b35}.navbar-profile{width:36px;height:36px;border-radius:var(--radius-full);background:var(--gradient-primary);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.875rem;cursor:pointer;transition:transform var(--transition-fast)}.navbar-profile:hover{transform:scale(1.1)}.glass-card{background:var(--glass-bg);backdrop-filter:blur(var(--glass-blur));-webkit-backdrop-filter:blur(var(--glass-blur));border:1px solid var(--glass-border);border-radius:var(--radius-lg);padding:var(--space-lg);transition:all var(--transition-normal)}.glass-card:hover{border-color:var(--border-accent);box-shadow:var(--shadow-glow-cyan);transform:translateY(-2px)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-sm);padding:10px 20px;font-size:.875rem;font-weight:600;border-radius:var(--radius-sm);transition:all var(--transition-fast);white-space:nowrap}.btn-primary{background:var(--gradient-primary);color:#fff;box-shadow:var(--shadow-glow-cyan)}.btn-primary:hover{opacity:.9;transform:translateY(-1px);box-shadow:0 0 30px #00e5ff40}.btn-secondary{background:var(--bg-elevated);border:1px solid var(--border-default);color:var(--text-primary)}.btn-secondary:hover{border-color:var(--accent-cyan);background:var(--bg-hover)}.btn-ghost{color:var(--text-secondary);padding:var(--space-sm) var(--space-md)}.btn-ghost:hover{color:var(--text-primary);background:var(--bg-hover)}.btn-success{background:var(--gradient-success);color:#fff}.btn-success:hover{opacity:.9;transform:translateY(-1px)}.btn-sm{padding:6px 12px;font-size:.8rem}.btn-lg{padding:14px 28px;font-size:1rem}.difficulty-badge{display:inline-flex;align-items:center;padding:3px 10px;border-radius:var(--radius-full);font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em}.difficulty-badge.easy{background:#00e6761f;color:var(--easy);border:1px solid rgba(0,230,118,.25)}.difficulty-badge.medium{background:#ffa7261f;color:var(--medium);border:1px solid rgba(255,167,38,.25)}.difficulty-badge.hard{background:#ff52521f;color:var(--hard);border:1px solid rgba(255,82,82,.25)}.category-tag{display:inline-flex;align-items:center;gap:4px;padding:3px 10px;border-radius:var(--radius-full);font-size:.72rem;font-weight:500;background:#ffffff0d;border:1px solid var(--border-subtle);color:var(--text-secondary)}.tag-chip{display:inline-flex;padding:2px 8px;border-radius:var(--radius-sm);font-size:.7rem;font-weight:500;background:var(--bg-elevated);color:var(--text-muted);border:1px solid var(--border-subtle)}.hero{position:relative;padding:var(--space-3xl) var(--space-xl);background:var(--gradient-hero);overflow:hidden;min-height:500px;display:flex;align-items:center;justify-content:center}.hero-bg-grid{position:absolute;top:0;right:0;bottom:0;left:0;background-image:linear-gradient(rgba(0,229,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(0,229,255,.03) 1px,transparent 1px);background-size:60px 60px;animation:gridPulse 8s ease-in-out infinite}.hero-glow{position:absolute;width:600px;height:600px;border-radius:50%;filter:blur(120px);opacity:.15;pointer-events:none}.hero-glow.cyan{background:var(--accent-cyan);top:-200px;right:-100px;animation:glowFloat 12s ease-in-out infinite}.hero-glow.purple{background:var(--accent-purple);bottom:-200px;left:-100px;animation:glowFloat 12s ease-in-out infinite reverse}.hero-content{position:relative;z-index:2;text-align:center;max-width:800px}.hero-badge{display:inline-flex;align-items:center;gap:var(--space-sm);padding:6px 16px;background:#00e5ff14;border:1px solid rgba(0,229,255,.2);border-radius:var(--radius-full);font-size:.8rem;font-weight:500;color:var(--accent-cyan);margin-bottom:var(--space-lg);animation:fadeInUp .6s ease-out}.hero h1{font-size:3.5rem;font-weight:900;line-height:1.1;letter-spacing:-.03em;margin-bottom:var(--space-lg);animation:fadeInUp .6s ease-out .1s both}.hero h1 .gradient-text{background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-subtitle{font-size:1.15rem;color:var(--text-secondary);line-height:1.7;margin-bottom:var(--space-xl);max-width:600px;margin-left:auto;margin-right:auto;animation:fadeInUp .6s ease-out .2s both}.hero-actions{display:flex;align-items:center;justify-content:center;gap:var(--space-md);animation:fadeInUp .6s ease-out .3s both}.hero-stats{display:flex;align-items:center;justify-content:center;gap:var(--space-2xl);margin-top:var(--space-3xl);animation:fadeInUp .6s ease-out .4s both}.hero-stat{text-align:center}.hero-stat-value{font-size:2rem;font-weight:800;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-stat-label{font-size:.8rem;color:var(--text-muted);margin-top:var(--space-xs);text-transform:uppercase;letter-spacing:.08em}.section{padding:var(--space-3xl) var(--space-xl);max-width:var(--max-width);margin:0 auto}.section-header{text-align:center;margin-bottom:var(--space-2xl)}.section-title{font-size:2rem;font-weight:800;letter-spacing:-.02em;margin-bottom:var(--space-sm)}.section-subtitle{font-size:1rem;color:var(--text-secondary)}.categories-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:var(--space-lg)}.category-card{position:relative;padding:var(--space-xl);border-radius:var(--radius-lg);background:var(--bg-surface);border:1px solid var(--border-subtle);overflow:hidden;transition:all var(--transition-normal);cursor:pointer;text-decoration:none;color:var(--text-primary)}.category-card:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;border-radius:var(--radius-lg) var(--radius-lg) 0 0}.category-card.digital:before{background:var(--cat-digital)}.category-card.verilog:before{background:var(--cat-verilog)}.category-card.systemverilog:before{background:var(--cat-systemverilog)}.category-card.uvm:before{background:var(--cat-uvm)}.category-card:hover{transform:translateY(-4px);border-color:var(--border-accent);box-shadow:var(--shadow-lg)}.category-icon{width:48px;height:48px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:var(--space-md)}.category-card.digital .category-icon{background:#00e5ff1a}.category-card.verilog .category-icon{background:#7c4dff1a}.category-card.systemverilog .category-icon{background:#ff40811a}.category-card.uvm .category-icon{background:#ffd7401a}.category-card h3{font-size:1.1rem;font-weight:700;margin-bottom:var(--space-xs)}.category-card p{font-size:.85rem;color:var(--text-secondary);margin-bottom:var(--space-md)}.category-progress{height:4px;background:var(--bg-hover);border-radius:var(--radius-full);overflow:hidden}.category-progress-fill{height:100%;border-radius:var(--radius-full);transition:width var(--transition-slow)}.category-card.digital .category-progress-fill{background:var(--cat-digital)}.category-card.verilog .category-progress-fill{background:var(--cat-verilog)}.category-card.systemverilog .category-progress-fill{background:var(--cat-systemverilog)}.category-card.uvm .category-progress-fill{background:var(--cat-uvm)}.category-meta{display:flex;justify-content:space-between;margin-top:var(--space-sm);font-size:.75rem;color:var(--text-muted)}.problems-page{display:flex;gap:var(--space-xl);padding:var(--space-xl);max-width:var(--max-width);margin:0 auto}.problems-sidebar{width:var(--sidebar-width);flex-shrink:0}.problems-main{flex:1;min-width:0}.filter-group{margin-bottom:var(--space-lg)}.filter-group h3{font-size:.8rem;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted);margin-bottom:var(--space-sm)}.filter-options{display:flex;flex-direction:column;gap:var(--space-xs)}.filter-btn{display:flex;align-items:center;justify-content:space-between;padding:var(--space-sm) var(--space-md);font-size:.85rem;color:var(--text-secondary);border-radius:var(--radius-sm);transition:all var(--transition-fast)}.filter-btn:hover,.filter-btn.active{background:var(--bg-hover);color:var(--text-primary)}.filter-btn.active{color:var(--accent-cyan);background:#00e5ff14}.filter-count{font-size:.75rem;color:var(--text-muted);background:var(--bg-surface);padding:1px 8px;border-radius:var(--radius-full)}.search-bar{width:100%;padding:10px 16px 10px 40px;background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-md);font-size:.9rem;color:var(--text-primary);margin-bottom:var(--space-lg);transition:all var(--transition-fast)}.search-bar:focus{border-color:var(--accent-cyan);box-shadow:var(--shadow-glow-cyan)}.search-wrapper{position:relative}.search-wrapper:before{content:"🔍";position:absolute;left:14px;top:50%;transform:translateY(-50%);font-size:.85rem;pointer-events:none}.problems-list{display:flex;flex-direction:column;gap:var(--space-sm)}.problem-row{display:flex;align-items:center;gap:var(--space-md);padding:var(--space-md) var(--space-lg);background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-md);transition:all var(--transition-fast);cursor:pointer;text-decoration:none;color:var(--text-primary)}.problem-row:hover{border-color:var(--border-accent);background:var(--bg-elevated);transform:translate(4px)}.problem-status{width:24px;height:24px;border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;font-size:.7rem;flex-shrink:0}.problem-status.solved{background:#00e67626;color:var(--easy)}.problem-status.attempted{background:#ffa72626;color:var(--medium)}.problem-status.unsolved{background:var(--bg-hover);color:var(--text-muted)}.problem-info{flex:1;min-width:0}.problem-title{font-size:.95rem;font-weight:600;margin-bottom:2px}.problem-tags{display:flex;align-items:center;gap:var(--space-xs);flex-wrap:wrap}.problem-acceptance{font-size:.8rem;color:var(--text-muted);white-space:nowrap}.solve-page{display:flex;height:calc(100vh - var(--navbar-height));overflow:hidden}.solve-description{width:45%;min-width:350px;overflow-y:auto;padding:var(--space-xl);border-right:1px solid var(--border-subtle);background:var(--bg-base)}.solve-editor-panel{flex:1;display:flex;flex-direction:column;min-width:0}.solve-header{display:flex;align-items:center;gap:var(--space-md);margin-bottom:var(--space-lg);flex-wrap:wrap}.solve-header h1{font-size:1.4rem;font-weight:700}.solve-desc-content{font-size:.92rem;line-height:1.8;color:var(--text-secondary)}.solve-desc-content h2{font-size:1.1rem;font-weight:700;color:var(--text-primary);margin-top:var(--space-xl);margin-bottom:var(--space-sm)}.solve-desc-content h3{font-size:.95rem;font-weight:600;color:var(--text-primary);margin-top:var(--space-lg);margin-bottom:var(--space-sm)}.solve-desc-content pre{background:var(--bg-deepest);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);padding:var(--space-md);font-family:var(--font-mono);font-size:.85rem;overflow-x:auto;margin:var(--space-md) 0}.solve-desc-content code{font-family:var(--font-mono);background:var(--bg-elevated);padding:1px 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var(--transition-fast)}.hint-toggle:hover{background:#7c4dff26}.hint-content{margin-top:var(--space-sm);padding:var(--space-md);background:#7c4dff0d;border-radius:var(--radius-sm);border-left:3px solid var(--accent-purple);font-size:.85rem;color:var(--text-secondary)}.editor-toolbar{display:flex;align-items:center;justify-content:space-between;padding:var(--space-sm) var(--space-md);background:var(--bg-surface);border-bottom:1px solid var(--border-subtle)}.editor-lang-tag{font-family:var(--font-mono);font-size:.8rem;color:var(--accent-cyan);padding:2px 8px;background:#00e5ff14;border-radius:var(--radius-sm)}.editor-actions{display:flex;gap:var(--space-sm)}.editor-container{flex:1;min-height:0}.test-results-panel{background:var(--bg-surface);border-top:1px solid var(--border-subtle);max-height:280px;overflow-y:auto}.test-results-header{display:flex;align-items:center;justify-content:space-between;padding:var(--space-sm) var(--space-md);background:var(--bg-elevated);border-bottom:1px solid var(--border-subtle);font-size:.85rem;font-weight:600}.test-case{display:flex;align-items:center;gap:var(--space-md);padding:var(--space-sm) var(--space-md);border-bottom:1px solid var(--border-subtle);font-size:.85rem;font-family:var(--font-mono)}.test-case-icon{font-size:1rem;flex-shrink:0}.test-case-name{font-weight:500;min-width:100px;font-family:var(--font-sans)}.test-case-detail{flex:1;color:var(--text-muted);font-size:.8rem}.contests-page{max-width:var(--max-width);margin:0 auto;padding:var(--space-xl)}.contest-card{display:flex;align-items:center;gap:var(--space-xl);padding:var(--space-xl);background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);margin-bottom:var(--space-md);transition:all var(--transition-normal)}.contest-card:hover{border-color:var(--border-accent);box-shadow:var(--shadow-glow-cyan)}.contest-card.live{border-color:#00e67666;box-shadow:0 0 20px #00e6761a}.contest-card.live:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--gradient-success)}.contest-info{flex:1}.contest-name{font-size:1.15rem;font-weight:700;margin-bottom:var(--space-xs)}.contest-meta{font-size:.85rem;color:var(--text-secondary);display:flex;gap:var(--space-lg)}.live-badge{display:inline-flex;align-items:center;gap:var(--space-xs);padding:3px 10px;background:#00e6761f;color:var(--easy);border-radius:var(--radius-full);font-size:.75rem;font-weight:600}.live-dot{width:6px;height:6px;background:var(--easy);border-radius:50%;animation:livePulse 2s ease-in-out infinite}.leaderboard-page{max-width:900px;margin:0 auto;padding:var(--space-xl)}.leaderboard-table{width:100%;border-collapse:separate;border-spacing:0 var(--space-xs)}.leaderboard-table th{text-align:left;padding:var(--space-sm) var(--space-md);font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted)}.leaderboard-table td{padding:var(--space-md);background:var(--bg-surface);font-size:.9rem}.leaderboard-table tr td:first-child{border-radius:var(--radius-sm) 0 0 var(--radius-sm)}.leaderboard-table tr td:last-child{border-radius:0 var(--radius-sm) var(--radius-sm) 0}.leaderboard-table tbody tr{transition:all var(--transition-fast)}.leaderboard-table tbody tr:hover td{background:var(--bg-elevated)}.rank-cell{font-weight:800;font-size:1rem;width:50px}.rank-1{color:var(--accent-gold)}.rank-2{color:#b0bec5}.rank-3{color:#a1887f}.user-cell{display:flex;align-items:center;gap:var(--space-md)}.user-avatar{width:36px;height:36px;border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.85rem;color:#fff}.rating-cell{font-weight:700;font-family:var(--font-mono)}.profile-page{max-width:var(--max-width);margin:0 auto;padding:var(--space-xl)}.profile-header{display:flex;align-items:center;gap:var(--space-xl);padding:var(--space-xl);background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);margin-bottom:var(--space-xl)}.profile-avatar{width:80px;height:80px;border-radius:var(--radius-full);background:var(--gradient-primary);display:flex;align-items:center;justify-content:center;font-size:2rem;font-weight:800;color:#fff;flex-shrink:0}.profile-name{font-size:1.5rem;font-weight:700}.profile-joined{font-size:.85rem;color:var(--text-muted)}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:var(--space-md);margin-bottom:var(--space-xl)}.stat-card{padding:var(--space-lg);background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-md);text-align:center}.stat-value{font-size:1.75rem;font-weight:800;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.stat-label{font-size:.75rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em;margin-top:var(--space-xs)}.heatmap-container{padding:var(--space-lg);background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);margin-bottom:var(--space-xl);overflow-x:auto}.heatmap-container h3{font-size:1rem;font-weight:700;margin-bottom:var(--space-md)}.heatmap-grid{display:flex;gap:3px;flex-wrap:wrap}.heatmap-cell{width:14px;height:14px;border-radius:2px;background:var(--bg-hover);transition:all var(--transition-fast)}.heatmap-cell.level-1{background:#00e5ff26}.heatmap-cell.level-2{background:#00e5ff4d}.heatmap-cell.level-3{background:#00e5ff80}.heatmap-cell.level-4{background:#00e5ffbf}.badges-section{padding:var(--space-lg);background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);margin-bottom:var(--space-xl)}.badges-section h3{font-size:1rem;font-weight:700;margin-bottom:var(--space-md)}.badges-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(100px,1fr));gap:var(--space-md)}.badge-item{display:flex;flex-direction:column;align-items:center;gap:var(--space-xs);padding:var(--space-md);border-radius:var(--radius-md);transition:all var(--transition-fast)}.badge-item:hover{background:var(--bg-hover)}.badge-icon{font-size:2rem;filter:grayscale(1) opacity(.3);transition:filter var(--transition-normal)}.badge-item.earned .badge-icon{filter:none}.badge-name{font-size:.7rem;color:var(--text-muted);text-align:center;font-weight:500}.badge-item.earned .badge-name{color:var(--text-primary)}.daily-page{max-width:800px;margin:0 auto;padding:var(--space-xl)}.daily-hero{text-align:center;padding:var(--space-2xl);background:var(--bg-surface);border:1px solid var(--border-accent);border-radius:var(--radius-lg);margin-bottom:var(--space-xl);position:relative;overflow:hidden}.daily-hero:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--gradient-primary)}.daily-timer{font-size:2.5rem;font-weight:800;font-family:var(--font-mono);background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin:var(--space-md) 0}.daily-label{font-size:.85rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.08em}.resizer{width:5px;cursor:col-resize;background:var(--border-subtle);transition:background var(--transition-fast);flex-shrink:0}.resizer:hover,.resizer.active{background:var(--accent-cyan)}.loading-spinner{display:flex;justify-content:center;padding:var(--space-3xl)}.spinner{width:40px;height:40px;border:3px solid var(--border-default);border-top-color:var(--accent-cyan);border-radius:50%;animation:spin .8s linear infinite}.empty-state{text-align:center;padding:var(--space-3xl);color:var(--text-muted)}.empty-state-icon{font-size:3rem;margin-bottom:var(--space-md)}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes gridPulse{0%,to{opacity:1}50%{opacity:.5}}@keyframes glowFloat{0%,to{transform:translate(0)}33%{transform:translate(30px,-20px)}66%{transform:translate(-20px,15px)}}@keyframes spin{to{transform:rotate(360deg)}}@keyframes livePulse{0%,to{opacity:1}50%{opacity:.3}}@keyframes slideInRight{0%{opacity:0;transform:translate(20px)}to{opacity:1;transform:translate(0)}}.ecosystem-section{padding:var(--space-3xl) var(--space-xl);background:var(--bg-surface);border-top:1px solid var(--border-subtle)}.ecosystem-grid{max-width:var(--max-width);margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:var(--space-lg)}.ecosystem-card{padding:var(--space-lg);background:var(--bg-elevated);border:1px solid var(--border-subtle);border-radius:var(--radius-md);transition:all var(--transition-normal);text-decoration:none;color:var(--text-primary)}.ecosystem-card:hover{border-color:var(--border-accent);transform:translateY(-2px)}.ecosystem-card-icon{font-size:1.5rem;margin-bottom:var(--space-sm)}.ecosystem-card h4{font-size:.95rem;font-weight:600;margin-bottom:var(--space-xs)}.ecosystem-card p{font-size:.8rem;color:var(--text-secondary)}@media(max-width:1024px){.problems-page{flex-direction:column}.problems-sidebar{width:100%}.solve-page{flex-direction:column}.solve-description{width:100%;min-width:unset;max-height:40vh;border-right:none;border-bottom:1px solid var(--border-subtle)}}@media(max-width:768px){.hero h1{font-size:2.2rem}.hero-stats{flex-wrap:wrap;gap:var(--space-lg)}.navbar-links{display:none}.section{padding:var(--space-xl) var(--space-md)}}@media(max-width:480px){.hero h1{font-size:1.8rem}.hero-actions{flex-direction:column}}