:root{--bg-primary: #050505;--bg-card: rgba(20, 20, 20, .7);--bg-elevated: rgba(30, 30, 30, .8);--accent-orange: #ff6b35;--accent-cyan: #00d9ff;--accent-green: #10b981;--accent-muted: rgba(255, 107, 53, .6);--glass-blur: blur(12px);--border: rgba(255, 255, 255, .08);--border-subtle: rgba(255, 255, 255, .05);--text-primary: rgba(255, 255, 255, .95);--text-secondary: rgba(255, 255, 255, .7);--text-muted: rgba(255, 255, 255, .5);--font-display: "Bricolage Grotesque", system-ui, sans-serif;--font-mono: "JetBrains Mono", monospace}*{box-sizing:border-box}html{font-size:16px;-webkit-font-smoothing:antialiased}body{margin:0;min-height:100vh;background:var(--bg-primary);color:var(--text-primary);font-family:var(--font-display);line-height:1.5}#root{min-height:100vh;display:flex;flex-direction:column}a{color:var(--accent-cyan);text-decoration:none;transition:color .15s ease}a:hover{color:var(--accent-orange)}button{font-family:inherit;cursor:pointer}input,textarea,select{font-family:inherit}.loading-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;font-family:var(--font-mono);color:var(--text-muted)}.layout{min-height:100vh;display:flex;flex-direction:column}.header{display:flex;align-items:center;justify-content:space-between;padding:12px 24px;border-bottom:1px solid var(--border);background:var(--bg-card);-webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur)}.logo{display:flex;align-items:center;gap:8px;font-weight:600;font-size:1.125rem;color:var(--text-primary);text-decoration:none}.logo:hover{color:var(--accent-orange)}.logo-icon{font-size:1.5rem}.nav{display:flex;align-items:center;gap:16px}.user-email{font-size:.875rem;color:var(--text-muted)}.main{flex:1;padding:24px;max-width:1200px;width:100%;margin:0 auto}.footer{padding:16px 24px;border-top:1px solid var(--border);text-align:center;font-size:.875rem;color:var(--text-muted)}.btn{padding:8px 16px;border-radius:6px;font-size:.875rem;font-weight:500;border:none;transition:all .15s ease}.btn-primary{background:var(--accent-orange);color:#050505}.btn-primary:hover:not(:disabled){background:#ff8555;transform:translateY(-1px)}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.btn-ghost{background:transparent;color:var(--text-secondary)}.btn-ghost:hover{color:var(--accent-orange)}.btn-toggle{background:var(--border);color:var(--text-secondary);margin-top:12px}.btn-toggle:hover{background:var(--border-subtle);color:var(--text-primary)}.btn-toggle.active{background:var(--accent-green);color:#050505}.btn-link{background:transparent;color:var(--accent-cyan);border:1px solid var(--accent-cyan);text-decoration:none;display:inline-flex;align-items:center}.btn-link:hover{background:#00d9ff1a}.auth-page{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px}.auth-card{width:100%;max-width:400px;background:var(--bg-card);border:1px solid var(--border);border-radius:12px;padding:32px;-webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur)}.auth-header{text-align:center;margin-bottom:24px}.auth-header h1{font-size:1.75rem;font-weight:700;margin:0 0 8px;letter-spacing:-.02em}.auth-header p{color:var(--text-secondary);font-size:.875rem;margin:0}.auth-form{display:flex;flex-direction:column;gap:16px}.auth-error{padding:12px;background:#ef444426;border:1px solid rgba(239,68,68,.3);border-radius:6px;color:#fca5a5;font-size:.875rem}.field label{display:block;font-size:.75rem;font-weight:500;color:var(--text-muted);margin-bottom:4px;text-transform:uppercase;letter-spacing:.05em}.field input{width:100%;padding:10px 12px;background:var(--bg-primary);border:1px solid var(--border);border-radius:6px;color:var(--text-primary);font-size:.9375rem}.field input:focus{outline:none;border-color:var(--accent-cyan)}.auth-divider{display:flex;align-items:center;gap:12px;margin:20px 0 16px;color:var(--text-muted);font-size:.8125rem}.auth-divider:before,.auth-divider:after{content:"";flex:1;height:1px;background:var(--border)}.auth-divider span{white-space:nowrap}.auth-google{display:flex;justify-content:center}.auth-google>div{width:100%!important}.auth-google iframe{margin:0 auto!important}.auth-footer{text-align:center;margin-top:24px;font-size:.875rem;color:var(--text-muted)}.auth-page-footer{margin-top:32px;font-size:.75rem;color:var(--text-muted)}.landing{min-height:100vh;display:flex;flex-direction:column}.landing-header{position:fixed;top:0;left:0;right:0;z-index:100;padding:16px 24px;background:#050505cc;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}.landing-nav{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between}.landing-logo{font-size:1.25rem;font-weight:700;color:var(--text-primary);letter-spacing:-.02em}.landing-nav-links{display:flex;align-items:center;gap:16px}.landing-nav-link{color:var(--text-secondary);font-size:.9375rem;transition:color .2s}.landing-nav-link:hover{color:var(--accent-cyan)}.landing-btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 20px;font-size:.9375rem;font-weight:600;border-radius:8px;transition:all .2s;text-decoration:none;border:none;cursor:pointer}.landing-btn-primary{background:linear-gradient(135deg,var(--accent-orange),#e55a2b);color:#fff}.landing-btn-primary:hover{opacity:.95;transform:translateY(-1px)}.landing-btn-outline{background:transparent;color:var(--text-secondary);border:1px solid var(--border)}.landing-btn-outline:hover{border-color:var(--accent-cyan);color:var(--accent-cyan)}.landing-btn-hero{background:linear-gradient(135deg,var(--accent-cyan),#00b8d9);color:#050505;padding:14px 28px;font-size:1rem}.landing-btn-hero:hover{opacity:.95;transform:translateY(-2px);box-shadow:0 8px 24px #00d9ff4d}.landing-btn-lg{padding:14px 32px;font-size:1rem}.landing-hero{position:relative;flex:1;display:flex;align-items:center;justify-content:center;min-height:100vh;padding:120px 24px 80px;overflow:hidden}.landing-hero-bg{position:absolute;top:0;right:0;bottom:0;left:0;background:radial-gradient(ellipse 80% 50% at 50% -20%,rgba(255,107,53,.15),transparent),radial-gradient(ellipse 60% 40% at 80% 50%,rgba(0,217,255,.08),transparent),radial-gradient(ellipse 50% 30% at 20% 80%,rgba(16,185,129,.06),transparent),linear-gradient(180deg,#050505,#0a0a0a)}.landing-hero-bg:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background-image:url("data:image/svg+xml,%3Csvg 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360px;bottom:auto;left:auto;transform:none;max-width:360px;width:100%;opacity:1}.landing-hero-image{max-height:320px}.landing-hero-content{flex:1;text-align:left;max-width:520px}.landing-hero-subtitle{margin-left:0;margin-right:0}.landing-hero-cta{justify-content:flex-start}}.landing-hero-content{position:relative;z-index:1;max-width:720px;text-align:center}.landing-hero-title{font-size:clamp(2.25rem,5vw,3.5rem);font-weight:700;line-height:1.15;letter-spacing:-.03em;margin:0 0 20px;color:var(--text-primary)}.landing-hero-accent{background:linear-gradient(135deg,var(--accent-cyan),var(--accent-orange));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.landing-hero-subtitle{font-size:1.125rem;line-height:1.6;color:var(--text-secondary);max-width:560px;margin:0 auto 32px}.landing-hero-cta{display:flex;flex-wrap:wrap;gap:16px;justify-content:center}.landing-features{padding:80px 24px 100px;background:var(--bg-primary)}.landing-features-title{text-align:center;font-size:1.75rem;font-weight:700;margin:0 0 48px;color:var(--text-primary)}.landing-features-title-sub{margin-top:64px;margin-bottom:32px}.landing-features-grid-sm{max-width:640px;margin:0 auto}.landing-features-grid{max-width:1100px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px}.landing-feature-card{padding:28px;background:var(--bg-card);border:1px solid var(--border);border-radius:12px;-webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur);transition:border-color .2s,transform .2s}.landing-feature-card:hover{border-color:#00d9ff4d;transform:translateY(-2px)}.landing-feature-icon{font-size:2rem;display:block;margin-bottom:16px}.landing-feature-title{font-size:1.125rem;font-weight:600;margin:0 0 8px;color:var(--text-primary)}.landing-feature-desc{font-size:.9375rem;line-height:1.5;color:var(--text-secondary);margin:0}.landing-cta{padding:80px 24px;background:linear-gradient(180deg,transparent 0%,rgba(0,217,255,.05) 100%);border-top:1px solid var(--border)}.landing-cta-content{max-width:560px;margin:0 auto;text-align:center}.landing-cta-title{font-size:1.5rem;font-weight:700;margin:0 0 12px;color:var(--text-primary)}.landing-cta-subtitle{font-size:1rem;color:var(--text-secondary);margin:0 0 24px}.landing-footer{padding:24px;text-align:center;font-size:.875rem;color:var(--text-muted);border-top:1px solid var(--border)}.landing-footer a{color:var(--accent-cyan);font-weight:500}.landing-footer a:hover{color:var(--accent-orange)}.dashboard{display:flex;flex-direction:column;gap:32px}.dashboard-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:48px;min-height:200px}.spinner{width:32px;height:32px;border:3px solid var(--border);border-top-color:var(--accent-orange);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.toast{padding:12px 16px;border-radius:8px;display:flex;align-items:center;justify-content:space-between;gap:12px}.toast-error{background:#ef444426;border:1px solid rgba(239,68,68,.3);color:#fca5a5}.toast button{background:none;border:none;color:inherit;font-size:1.25rem;cursor:pointer}.hero{text-align:center}.hero h1{font-size:1.75rem;font-weight:700;margin:0 0 8px;letter-spacing:-.02em}.hero p{color:var(--text-secondary);font-size:.9375rem;margin:0}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:16px}.stats-card{background:var(--bg-card);border:1px solid var(--border);border-radius:8px;padding:16px;display:flex;flex-direction:column;gap:4px}.stats-card.accent-orange{border-left:3px solid var(--accent-orange)}.stats-card.accent-cyan{border-left:3px solid var(--accent-cyan)}.stats-card.accent-green{border-left:3px solid var(--accent-green)}.stats-label{font-size:.75rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em}.stats-value{font-family:var(--font-mono);font-size:1.5rem;font-weight:600}.stats-sub{font-size:.75rem;color:var(--text-secondary)}.badges-section h2,.books-section h2,.leaderboard-section h2{font-size:1rem;font-weight:600;margin:0 0 12px;color:var(--text-primary)}.badges-list{display:flex;flex-wrap:wrap;gap:8px}.badge-item{display:flex;align-items:center;gap:6px;padding:6px 12px;background:var(--bg-elevated);border:1px solid var(--border);border-radius:6px;font-size:.8125rem}.badge-icon{font-size:1rem}.challenge-card{background:linear-gradient(135deg,#ff6b351a,#00d9ff0d);border:1px solid var(--border);border-radius:8px;padding:16px}.challenge-card h2{font-size:1rem;margin:0 0 8px}.challenge-desc{color:var(--text-secondary);font-size:.875rem;margin:0 0 12px}.challenge-progress{display:flex;align-items:center;gap:12px}.progress-bar{flex:1;height:8px;background:var(--bg-primary);border-radius:4px;overflow:hidden}.progress-fill{height:100%;background:var(--accent-orange);border-radius:4px;transition:width .2s ease}.challenge-count{font-family:var(--font-mono);font-size:.8125rem;color:var(--text-muted)}.challenge-done{display:inline-block;margin-top:8px;font-size:.8125rem;color:var(--accent-green)}.books-header{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;margin-bottom:16px}.filters{display:flex;gap:8px;flex-wrap:wrap}.search-input{padding:8px 12px;min-width:200px;background:var(--bg-card);border:1px solid var(--border);border-radius:6px;color:var(--text-primary);font-size:.875rem}.search-input:focus{outline:none;border-color:var(--accent-cyan)}.filter-select{padding:8px 12px;background:var(--bg-card);border:1px solid var(--border);border-radius:6px;color:var(--text-primary);font-size:.875rem}.books-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}.book-card{background:var(--bg-card);border:1px solid var(--border);border-radius:8px;padding:16px;transition:border-color .15s ease}.book-card:hover{border-color:var(--border-subtle)}.book-card.completed{border-color:#10b9814d;background:#10b9810d}.book-card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.priority-badge{font-family:var(--font-mono);font-size:.6875rem;font-weight:600;padding:2px 6px;border-radius:4px}.priority-p0{background:#ff6b3533;color:var(--accent-orange)}.priority-p1{background:#00d9ff33;color:var(--accent-cyan)}.priority-p2{background:#10b98133;color:var(--accent-green)}.priority-p3{background:#ffffff1a;color:var(--text-muted)}.book-xp{font-family:var(--font-mono);font-size:.75rem;color:var(--text-muted)}.book-title{font-size:.9375rem;font-weight:600;margin:0 0 4px;line-height:1.5}.book-topic{font-size:.75rem;color:var(--text-secondary);margin:0 0 8px}.book-rank{font-family:var(--font-mono);font-size:.6875rem;color:var(--text-muted)}.book-tags{display:flex;flex-wrap:wrap;gap:4px;margin-bottom:8px}.tag{font-size:.6875rem;padding:2px 6px;background:var(--bg-elevated);border:1px solid var(--border);border-radius:4px;color:var(--text-muted)}.book-card-actions{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap}.book-card-actions .btn-toggle{margin-top:0}.ranking-legend{background:var(--bg-card);border:1px solid var(--border);border-radius:8px;padding:16px}.ranking-legend h2{font-size:1rem;margin:0 0 12px}.legend-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px}.legend-item{padding:12px;border-radius:6px;border-left:4px solid var(--border)}.legend-item.priority-p0{border-left-color:var(--accent-orange)}.legend-item.priority-p1{border-left-color:var(--accent-cyan)}.legend-item.priority-p2{border-left-color:var(--accent-green)}.legend-item.priority-p3{border-left-color:var(--text-muted)}.legend-priority{font-family:var(--font-mono);font-weight:600;font-size:.875rem;display:block;margin-bottom:4px}.legend-label{font-size:.8125rem;font-weight:500;display:block}.legend-desc{font-size:.75rem;color:var(--text-muted);display:block;margin-top:4px}.leaderboard{background:var(--bg-card);border:1px solid var(--border);border-radius:8px;overflow:hidden}.leaderboard-row{display:grid;grid-template-columns:40px 1fr auto auto;gap:16px;align-items:center;padding:12px 16px;border-bottom:1px solid var(--border)}.leaderboard-row:last-child{border-bottom:none}.leaderboard .rank{font-family:var(--font-mono);font-size:.8125rem;color:var(--text-muted)}.leaderboard .name{font-size:.875rem}.leaderboard .xp{font-family:var(--font-mono);font-size:.8125rem;color:var(--accent-orange)}.leaderboard .streak{font-size:.8125rem;color:var(--text-muted)}.empty-state{color:var(--text-muted);font-size:.875rem;text-align:center;padding:24px}@media(max-width:640px){.main{padding:16px}.header{padding:12px 16px}.header .user-email{display:none}}