:root{--bg-primary: #0a0a0a;--bg-secondary: #111111;--bg-card: #0f0f0f;--bg-card-hover: #141414;--bg-glass: rgba(255, 255, 255, .03);--bg-glass-hover: rgba(255, 255, 255, .06);--neon-emerald: #00ff9d;--neon-emerald-dim: #00cc7d;--neon-emerald-glow: rgba(0, 255, 157, .15);--neon-emerald-glow-strong: rgba(0, 255, 157, .35);--electric-blue: #00b4ff;--electric-blue-dim: #0090cc;--electric-blue-glow: rgba(0, 180, 255, .15);--neon-red: #ff3b5c;--neon-red-glow: rgba(255, 59, 92, .15);--neon-amber: #ffb800;--neon-amber-glow: rgba(255, 184, 0, .15);--neon-purple: #a855f7;--neon-purple-glow: rgba(168, 85, 247, .15);--text-primary: #e8e8e8;--text-secondary: #8a8a8a;--text-muted: #555555;--text-accent: var(--neon-emerald);--border-dim: rgba(255, 255, 255, .06);--border-medium: rgba(255, 255, 255, .1);--border-bright: rgba(255, 255, 255, .15);--border-solved: var(--neon-emerald);--border-unsolved: rgba(255, 255, 255, .08);--glass-blur: 20px;--glass-bg: rgba(15, 15, 15, .7);--glass-border: rgba(255, 255, 255, .08);--font-mono: "JetBrains Mono", "Roboto Mono", "Fira Code", monospace;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--radius-xl: 20px;--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-base: .25s cubic-bezier(.4, 0, .2, 1);--transition-smooth: .4s cubic-bezier(.16, 1, .3, 1);--shadow-card: 0 4px 24px rgba(0, 0, 0, .4);--shadow-card-hover: 0 8px 40px rgba(0, 0, 0, .6);--shadow-neon-green: 0 0 20px var(--neon-emerald-glow), 0 0 60px var(--neon-emerald-glow);--shadow-neon-blue: 0 0 20px var(--electric-blue-glow), 0 0 60px var(--electric-blue-glow);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;scroll-behavior:smooth}body{font-family:var(--font-sans);background-color:var(--bg-primary);color:var(--text-primary);min-height:100vh;line-height:1.6;overflow-x:hidden;position:relative}body:before{content:"";position:fixed;inset:0;z-index:0;background-image:linear-gradient(rgba(0,255,157,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(0,255,157,.03) 1px,transparent 1px);background-size:60px 60px;pointer-events:none}body:after{content:"";position:fixed;inset:0;z-index:0;background:radial-gradient(ellipse 80% 60% at 50% 0%,rgba(0,255,157,.04) 0%,transparent 70%),radial-gradient(ellipse 60% 40% at 80% 20%,rgba(0,180,255,.03) 0%,transparent 60%);pointer-events:none}#root{position:relative;z-index:1;min-height:100vh}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:#ffffff1a;border-radius:3px}::-webkit-scrollbar-thumb:hover{background:#fff3}::selection{background:var(--neon-emerald-glow-strong);color:var(--text-primary)}.mono{font-family:var(--font-mono)}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideInRight{0%{opacity:0;transform:translate(30px)}to{opacity:1;transform:translate(0)}}@keyframes pulse-glow{0%,to{opacity:1}50%{opacity:.6}}@keyframes shake{0%,to{transform:translate(0)}10%,30%,50%,70%,90%{transform:translate(-4px)}20%,40%,60%,80%{transform:translate(4px)}}@keyframes glitch-success{0%{clip-path:inset(0 0 0 0);transform:translate(0)}20%{clip-path:inset(20% 0 60% 0);transform:translate(-2px,2px)}40%{clip-path:inset(40% 0 20% 0);transform:translate(2px,-1px)}60%{clip-path:inset(60% 0 10% 0);transform:translate(-1px,1px)}80%{clip-path:inset(10% 0 80% 0);transform:translate(1px,-2px)}to{clip-path:inset(0 0 0 0);transform:translate(0)}}@keyframes confetti-pop{0%{transform:scale(0) rotate(0);opacity:1}50%{transform:scale(1.2) rotate(180deg);opacity:1}to{transform:scale(0) rotate(360deg);opacity:0}}@keyframes border-glow-pulse{0%,to{box-shadow:0 0 8px var(--neon-emerald-glow),0 0 24px var(--neon-emerald-glow),inset 0 0 8px var(--neon-emerald-glow)}50%{box-shadow:0 0 16px var(--neon-emerald-glow-strong),0 0 48px var(--neon-emerald-glow),inset 0 0 16px var(--neon-emerald-glow)}}@keyframes scanline{0%{top:-10%}to{top:110%}}@keyframes rank-glow{0%,to{text-shadow:0 0 8px currentColor}50%{text-shadow:0 0 20px currentColor,0 0 40px currentColor}}.app{min-height:100vh;display:flex;flex-direction:column}.dashboard{flex:1;max-width:1400px;width:100%;margin:0 auto;padding:28px 32px}.dashboard-progress{margin-bottom:32px;padding:20px 24px;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);animation:fadeInUp .4s ease-out both}.dashboard-layout{display:grid;grid-template-columns:1fr 300px;gap:28px;align-items:start}.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.section-title{font-size:.85rem;font-weight:700;color:var(--text-primary);letter-spacing:.06em}.section-bracket{color:var(--neon-emerald);margin-right:8px;opacity:.7}.section-count{font-size:.7rem;color:var(--text-muted);font-weight:500;letter-spacing:.08em}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px}.app-footer{margin-top:auto;padding:20px 32px;border-top:1px solid var(--border-dim);text-align:center}.footer-content{display:flex;justify-content:center;align-items:center;gap:10px}.footer-text{font-size:.72rem;color:var(--text-muted);letter-spacing:.05em}.footer-bracket{color:var(--neon-emerald);opacity:.5}.footer-separator{color:var(--text-muted);opacity:.3}.footer-decoration{margin-top:12px;height:1px;max-width:200px;margin-left:auto;margin-right:auto;background:linear-gradient(90deg,transparent,var(--neon-emerald-glow),transparent)}@media(max-width:1024px){.dashboard-layout{grid-template-columns:1fr}.dashboard{padding:20px}}@media(max-width:768px){.dashboard{padding:16px 14px}.grid{grid-template-columns:1fr;gap:14px}.section-header{flex-direction:column;gap:6px;align-items:flex-start}.dashboard-progress{padding:16px 18px;margin-bottom:24px}}@media(max-width:480px){.dashboard{padding:12px 10px}.footer-content{flex-direction:column;gap:4px}.footer-separator{display:none}}.loading-screen{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px;min-height:60vh}.loading-spinner{width:36px;height:36px;border:3px solid rgba(0,255,157,.15);border-top-color:var(--neon-emerald);border-radius:50%;animation:spin .7s linear infinite}.loading-text{font-size:.85rem;color:var(--text-muted);letter-spacing:.06em}.error-text{color:#ff3b5c}.retry-btn{margin-top:8px;padding:10px 24px;background:#00ff9d1a;border:1px solid rgba(0,255,157,.3);border-radius:var(--radius-md);color:var(--neon-emerald);font-size:.8rem;font-weight:700;letter-spacing:.08em;cursor:pointer;transition:all .2s ease}.retry-btn:hover{background:#00ff9d33;border-color:var(--neon-emerald);box-shadow:0 0 16px #00ff9d26}.hud-header{display:flex;justify-content:space-between;align-items:center;padding:16px 28px;background:var(--glass-bg);backdrop-filter:blur(var(--glass-blur));-webkit-backdrop-filter:blur(var(--glass-blur));border-bottom:1px solid var(--glass-border);position:sticky;top:0;z-index:100;animation:fadeIn .5s ease-out}.hud-brand{display:flex;align-items:center;gap:14px}.hud-logo{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:var(--radius-md);background:linear-gradient(135deg,var(--neon-emerald-glow),transparent);border:1px solid rgba(0,255,157,.15);color:var(--neon-emerald)}.hud-title{font-size:1.15rem;font-weight:700;letter-spacing:.02em;color:var(--text-primary);line-height:1.2}.hud-title-bracket{color:var(--neon-emerald);margin-right:4px}.hud-cursor{display:inline-block;color:var(--neon-emerald);animation:pulse-glow 1s step-end infinite;margin-left:2px}.hud-subtitle{font-size:.7rem;color:var(--text-muted);letter-spacing:.12em;text-transform:uppercase;margin-top:1px}.hud-stats{display:flex;align-items:center;gap:16px}.hud-stat{display:flex;align-items:center;gap:10px;padding:8px 14px;border-radius:var(--radius-md);background:var(--bg-glass);border:1px solid var(--border-dim);transition:var(--transition-base)}.hud-stat:hover{background:var(--bg-glass-hover);border-color:var(--border-medium)}.hud-stat-icon{display:flex;align-items:center;justify-content:center}.hud-stat-icon--rank{color:var(--neon-amber)}.hud-stat-icon--points{color:var(--neon-emerald)}.hud-stat-content{display:flex;flex-direction:column}.hud-stat-label{font-size:.55rem;letter-spacing:.18em;color:var(--text-muted);font-weight:600;text-transform:uppercase}.hud-stat-value{font-size:.95rem;font-weight:700;color:var(--text-primary);line-height:1.2}.hud-stat-divider{width:1px;height:28px;background:var(--border-dim)}.hud-user{display:flex;align-items:center;gap:8px;padding:6px 12px;border-radius:var(--radius-md);background:var(--bg-glass);border:1px solid var(--border-dim)}.hud-user-name{font-size:.8rem;font-weight:600;color:var(--neon-cyan);letter-spacing:.03em}.hud-logout{background:none;border:none;color:var(--text-muted);font-size:.85rem;cursor:pointer;padding:0 2px;transition:color .2s ease;line-height:1}.hud-logout:hover{color:#ff3b5c}@media(max-width:640px){.hud-header{flex-direction:column;gap:12px;padding:14px 16px}.hud-stats{width:100%;justify-content:center}.hud-stat{padding:6px 10px}.hud-stat-label{font-size:.5rem}.hud-stat-value{font-size:.85rem}}.progress-container{width:100%;padding:0 4px}.progress-label{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}.progress-title{font-size:.7rem;letter-spacing:.15em;color:var(--text-secondary);font-weight:500}.progress-bracket{color:var(--neon-emerald);opacity:.6}.progress-count{font-size:.85rem;font-weight:700;color:var(--text-primary);transition:var(--transition-base)}.progress-count--complete{color:var(--neon-emerald);text-shadow:0 0 10px var(--neon-emerald-glow)}.progress-track{position:relative;width:100%;height:6px;background:var(--bg-secondary);border-radius:3px;overflow:hidden;border:1px solid var(--border-dim)}.progress-fill{position:relative;height:100%;background:linear-gradient(90deg,var(--neon-emerald-dim),var(--neon-emerald));border-radius:3px;transition:width .6s cubic-bezier(.16,1,.3,1)}.progress-fill--complete{background:linear-gradient(90deg,var(--neon-emerald),#66ffcc)}.progress-glow{position:absolute;top:-2px;right:-1px;width:20px;height:calc(100% + 4px);background:linear-gradient(90deg,transparent,var(--neon-emerald));filter:blur(4px);border-radius:0 3px 3px 0;animation:pulse-glow 2s ease-in-out infinite}.progress-segment{position:absolute;top:0;width:1px;height:100%;background:var(--bg-primary);opacity:.5;z-index:2}.challenge-card{position:relative;background:var(--bg-card);border:1px solid var(--border-unsolved);border-radius:var(--radius-lg);padding:22px;cursor:pointer;transition:all var(--transition-smooth);overflow:hidden;animation:fadeInUp .5s ease-out both}.challenge-card:before{content:"";position:absolute;inset:0;border-radius:var(--radius-lg);background:linear-gradient(135deg,rgba(255,255,255,.02) 0%,transparent 50%,rgba(255,255,255,.01) 100%);pointer-events:none;transition:var(--transition-smooth)}.challenge-card:hover{background:var(--bg-card-hover);border-color:var(--border-medium);box-shadow:var(--shadow-card);transform:translateY(-2px)}.challenge-card:hover:before{background:linear-gradient(135deg,rgba(255,255,255,.04) 0%,transparent 50%,rgba(255,255,255,.02) 100%)}.challenge-card--unsolved{border-color:var(--border-unsolved)}.challenge-card--unsolved:hover{border-color:color-mix(in srgb,var(--card-color) 30%,transparent);box-shadow:0 4px 24px color-mix(in srgb,var(--card-color) 8%,transparent)}.challenge-card--solved{border-color:var(--neon-emerald);box-shadow:0 0 8px var(--neon-emerald-glow),0 0 24px #00ff9d0f}.challenge-card--solved:hover{animation:border-glow-pulse 2s ease-in-out infinite}.challenge-card--expanded{cursor:default;grid-column:1 / -1;background:var(--bg-card-hover);border-color:color-mix(in srgb,var(--card-color) 40%,transparent);box-shadow:0 8px 48px color-mix(in srgb,var(--card-color) 10%,transparent)}.challenge-card--success{animation:glitch-success .4s ease-in-out;border-color:var(--neon-emerald)!important;box-shadow:0 0 30px var(--neon-emerald-glow-strong),0 0 60px var(--neon-emerald-glow)!important}.glitch-scanline{position:absolute;top:0;left:0;right:0;height:3px;background:var(--neon-emerald);opacity:.6;z-index:10;animation:scanline .4s linear;pointer-events:none;box-shadow:0 0 8px var(--neon-emerald),0 0 20px var(--neon-emerald-glow)}.confetti-container{position:absolute;top:50%;left:50%;z-index:20;pointer-events:none}.confetti-particle{position:absolute;width:6px;height:6px;border-radius:1px;background:var(--color);animation:confetti-fly .8s ease-out var(--delay) both}@keyframes confetti-fly{0%{transform:translate(0) rotate(0) scale(1);opacity:1}to{transform:translate(var(--x),var(--y)) rotate(var(--r)) scale(0);opacity:0}}.card-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:18px}.card-icon{display:flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:var(--radius-md);background:color-mix(in srgb,var(--card-color) 8%,transparent);border:1px solid color-mix(in srgb,var(--card-color) 15%,transparent);transition:var(--transition-base)}.challenge-card:hover .card-icon{background:color-mix(in srgb,var(--card-color) 12%,transparent);box-shadow:0 0 12px color-mix(in srgb,var(--card-color) 15%,transparent)}.card-meta{display:flex;flex-direction:column;align-items:flex-end;gap:6px}.difficulty-badge{font-size:.6rem;font-weight:700;letter-spacing:.15em;padding:3px 10px;border-radius:4px;line-height:1}.badge--easy{background:#00ff9d1a;color:var(--neon-emerald);border:1px solid rgba(0,255,157,.2)}.badge--medium{background:#ffb8001a;color:var(--neon-amber);border:1px solid rgba(255,184,0,.2)}.badge--hard{background:#ff3b5c1a;color:var(--neon-red);border:1px solid rgba(255,59,92,.2)}.status-indicator{display:flex;align-items:center;gap:4px;font-size:.55rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;font-family:var(--font-mono)}.status--unsolved{color:var(--text-muted)}.status--solved{color:var(--neon-emerald);text-shadow:0 0 8px var(--neon-emerald-glow)}.card-body{display:flex;flex-direction:column;gap:6px}.card-title{font-size:1.05rem;font-weight:700;color:var(--text-primary);line-height:1.3;transition:var(--transition-base)}.challenge-card:hover .card-title{color:#fff}.card-category{font-size:.65rem;font-weight:500;letter-spacing:.12em;text-transform:uppercase;opacity:.7}.card-points{margin-top:8px;display:flex;align-items:baseline;gap:4px}.points-value{font-size:1.5rem;font-weight:800;color:var(--text-primary);line-height:1}.points-label{font-size:.6rem;font-weight:600;color:var(--text-muted);letter-spacing:.1em}.card-expanded{margin-top:20px;padding-top:20px;border-top:1px solid var(--border-dim);animation:fadeIn .3s ease-out}.card-description{font-size:.88rem;line-height:1.7;color:var(--text-secondary);margin-bottom:16px;white-space:pre-line}.card-hint{display:flex;gap:8px;padding:12px 14px;background:#ffb8000a;border:1px solid rgba(255,184,0,.12);border-radius:var(--radius-sm);margin-bottom:18px;align-items:flex-start}.hint-label{font-size:.7rem;font-weight:700;color:var(--neon-amber);white-space:nowrap;flex-shrink:0}.hint-text{font-size:.8rem;color:var(--text-secondary);line-height:1.5}.flag-form{display:flex;gap:10px;align-items:center;margin-bottom:14px}.flag-form--shake{animation:shake .4s ease-in-out}.flag-input-wrapper{flex:1;display:flex;align-items:center;gap:8px;padding:10px 14px;background:var(--bg-primary);border:1px solid var(--border-medium);border-radius:var(--radius-sm);transition:var(--transition-base)}.flag-input-wrapper:focus-within{border-color:var(--neon-emerald-dim);box-shadow:0 0 0 3px var(--neon-emerald-glow),0 0 16px var(--neon-emerald-glow)}.flag-prompt{color:var(--neon-emerald);font-size:.85rem;font-weight:700;flex-shrink:0}.flag-input{flex:1;background:none;border:none;outline:none;color:var(--text-primary);font-size:.85rem;font-family:var(--font-mono);letter-spacing:.02em}.flag-input::placeholder{color:var(--text-muted)}.flag-input:disabled{color:var(--neon-emerald);opacity:.7}.flag-submit{display:inline-flex;align-items:center;justify-content:center;padding:10px 24px;background:transparent;color:var(--neon-emerald);border:1px solid var(--neon-emerald-dim);border-radius:var(--radius-sm);font-size:.78rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;cursor:pointer;transition:all var(--transition-base);white-space:nowrap}.flag-submit:hover{background:#00ff9d14;box-shadow:0 0 12px var(--neon-emerald-glow),0 0 30px #00ff9d14;border-color:var(--neon-emerald);color:#fff}.flag-submit:active{transform:scale(.97)}.flag-submit:disabled{opacity:.4;cursor:not-allowed}.flag-submit:disabled:hover{background:transparent;box-shadow:none;border-color:var(--neon-emerald-dim);color:var(--neon-emerald)}.submit-feedback{padding:8px 14px;border-radius:var(--radius-sm);font-size:.78rem;margin-bottom:12px;animation:fadeInUp .2s ease-out}.submit-feedback--success{background:#00ff9d14;border:1px solid rgba(0,255,157,.2);color:var(--neon-emerald)}.submit-feedback--error{background:#ff3b5c14;border:1px solid rgba(255,59,92,.2);color:#ff3b5c}.card-solves{font-size:.65rem;color:var(--text-muted);letter-spacing:.06em;margin-top:4px;opacity:.7}.card-attachments{padding:10px 14px;background:#00b4ff0a;border:1px solid rgba(0,180,255,.12);border-radius:var(--radius-sm);margin-bottom:14px}.attachment-label{font-size:.7rem;font-weight:700;color:#00b4ff;display:block;margin-bottom:8px}.attachment-list{display:flex;flex-wrap:wrap;gap:8px}.attachment-link{display:inline-flex;align-items:center;gap:4px;padding:4px 12px;background:#00b4ff14;border:1px solid rgba(0,180,255,.2);border-radius:4px;color:var(--text-secondary);font-size:.72rem;text-decoration:none;transition:all .2s ease}.attachment-link:hover{background:#00b4ff26;border-color:#00b4ff;color:#fff;box-shadow:0 0 12px #00b4ff26}.card-close{display:block;width:100%;padding:8px;background:none;border:1px solid var(--border-dim);border-radius:var(--radius-sm);color:var(--text-muted);font-size:.7rem;letter-spacing:.12em;cursor:pointer;transition:var(--transition-base);text-align:center}.card-close:hover{border-color:var(--border-medium);color:var(--text-secondary);background:var(--bg-glass)}.lb-empty{padding:20px;text-align:center;color:var(--text-muted);font-size:.78rem;letter-spacing:.04em}@media(max-width:768px){.challenge-card--expanded{grid-column:1 / -1}.flag-form{flex-direction:column}.flag-submit{width:100%}}.leaderboard{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-xl);padding:24px;animation:slideInRight .6s ease-out both;position:sticky;top:90px;overflow:hidden}.leaderboard:before{content:"";position:absolute;inset:0;border-radius:var(--radius-xl);background:linear-gradient(180deg,rgba(255,255,255,.03) 0%,transparent 30%,transparent 70%,rgba(255,255,255,.01) 100%);pointer-events:none}.leaderboard-header{display:flex;align-items:center;gap:10px;margin-bottom:22px;padding-bottom:14px;border-bottom:1px solid var(--border-dim);position:relative}.leaderboard-icon{display:flex;align-items:center;justify-content:center;color:var(--neon-amber);width:30px;height:30px;border-radius:var(--radius-sm);background:#ffb80014;border:1px solid rgba(255,184,0,.15)}.leaderboard-title{font-size:.8rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--text-primary)}.leaderboard-list{display:flex;flex-direction:column;gap:4px;position:relative}.lb-entry{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:var(--radius-md);transition:var(--transition-base);animation:fadeIn .4s ease-out both;position:relative}.lb-entry:hover{background:var(--bg-glass-hover)}.lb-entry--first{background:#ffb8000a;border:1px solid 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