:root{--bg: #0b0f1a;--bg-soft: #111827;--card: #151d2e;--card-hover: #1a2438;--border: #243049;--text: #e6ebf5;--text-dim: #94a3b8;--primary: #facc15;--primary-dark: #eab308;--accent: #38bdf8;--green: #34d399;--red: #f87171;--radius: 14px;--mono: "JetBrains Mono", monospace}:root[data-theme=light]{--bg: #f4f6fb;--bg-soft: #e9edf6;--card: #ffffff;--card-hover: #f4f7fd;--border: #d8e0ee;--text: #17223a;--text-dim: #5b6b85;--primary: #d99e00;--primary-dark: #b88600;--accent: #0284c7}:root[data-theme=light] .navbar{background:#ffffffe0}:root[data-theme=light] .orb{opacity:.1}:root[data-theme=light] .grid-bg{background-image:linear-gradient(rgba(23,34,58,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(23,34,58,.06) 1px,transparent 1px)}:root[data-theme=light] .btn-primary{color:#241d00}:root[data-theme=light] .stats-strip{background:var(--card)}:root[data-theme=light] .footer-big{background:linear-gradient(180deg,var(--bg),#e6ebf5)}:root[data-theme=light] .footer-col a{color:#40506b}:root[data-theme=light] .preview-card,:root[data-theme=light] .testi-card,:root[data-theme=light] .lock-screen,:root[data-theme=light] .cta-box,:root[data-theme=light] .dev-card{background:var(--card)}:root[data-theme=light] .pg-problem-statement,:root[data-theme=light] .pg-req-list li{color:#33415c}:root[data-theme=light] .pgw-brief{background:var(--card)}:root[data-theme=light] .chat-sidebar{background:var(--card)}:root[data-theme=light] .auth-brand{background:linear-gradient(160deg,#e9eefa,var(--bg) 60%)}:root[data-theme=light] .auth-card.fancy{background:linear-gradient(var(--card),var(--card)) padding-box,linear-gradient(150deg,rgba(217,158,0,.55),rgba(2,132,199,.4),transparent 70%) border-box}*{margin:0;padding:0;box-sizing:border-box}body{background:var(--bg);color:var(--text);font-family:Nunito,system-ui,sans-serif;line-height:1.6}h1,h2{font-weight:700;letter-spacing:-.2px}h3,h4{font-weight:600}strong,b{font-weight:700}a{color:var(--accent);text-decoration:none}button{font-family:inherit;cursor:pointer}.navbar{display:flex;align-items:center;justify-content:space-between;padding:14px 28px;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:50;background:#0b0f1ad9;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.brand{font-size:1.3rem;font-weight:700;color:var(--text);display:flex;align-items:center;gap:9px}.brand svg{transition:transform .25s}.brand:hover svg{transform:rotate(-8deg) scale(1.08)}.brand-accent{color:var(--primary)}.nav-links{display:flex;align-items:center;gap:6px}.nav-links>a{color:var(--text-dim);font-weight:500;padding:8px 12px;border-radius:8px;line-height:1.2}.nav-links>a.active,.nav-links>a:hover{color:var(--text);background:#38bdf812}.nav-auth{display:flex;align-items:center;gap:12px}.nav-user{color:var(--text-dim);font-size:.9rem}.nav-user-link{display:flex;align-items:center;gap:8px;padding:4px 10px 4px 4px;border-radius:100px;border:1px solid transparent;transition:all .13s}.nav-user-link:hover{border-color:var(--border);background:var(--card)}.nav-user-link:hover .nav-user{color:var(--text)}.nav-avatar{width:28px;height:28px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));color:#111;font-weight:700;font-size:.85rem;display:flex;align-items:center;justify-content:center}.theme-toggle{background:var(--card);border:1px solid var(--border);border-radius:100px;width:36px;height:36px;font-size:1rem;display:flex;align-items:center;justify-content:center;transition:all .15s}.theme-toggle:hover{border-color:var(--primary);transform:rotate(20deg)}.btn{display:inline-block;padding:10px 20px;border-radius:10px;border:none;font-weight:600;font-size:.95rem;transition:all .15s}.btn-primary{background:var(--primary);color:#1a1a06}.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px)}.btn-primary:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn-outline{background:transparent;color:var(--text);border:1px solid var(--border)}.btn-outline:hover{border-color:var(--primary);color:var(--primary)}.btn-ghost{background:transparent;color:var(--text-dim);border:none}.btn-ghost:hover{color:var(--text)}.btn-lg{padding:14px 30px;font-size:1.05rem}.landing{overflow-x:hidden}.hero{text-align:center;padding:90px 20px 40px;position:relative}.hero:before{content:"";position:absolute;inset:-200px 0 auto;height:500px;background:radial-gradient(ellipse at top,rgba(250,204,21,.12),transparent 65%);pointer-events:none}.hero-badge{display:inline-block;padding:6px 16px;border-radius:100px;border:1px solid var(--border);color:var(--text-dim);font-size:.85rem;margin-bottom:26px;background:var(--bg-soft)}.hero h1{font-size:clamp(2.4rem,6vw,4rem);font-weight:700;line-height:1.15}.gradient-text{background:linear-gradient(90deg,var(--primary),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}.hero-sub{max-width:640px;margin:22px auto 34px;color:var(--text-dim);font-size:1.12rem}.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}.hero-proof{display:inline-flex;align-items:center;gap:10px;margin-top:22px;padding:9px 20px 9px 12px;background:var(--card);border:1px solid var(--border);border-radius:100px;color:var(--text-dim);font-size:.88rem}.hero-proof strong{color:var(--text)}.hero-proof-avatars{display:flex}.hero-proof-avatar{width:28px;height:28px;border-radius:50%;background:var(--bg-soft);border:2px solid var(--card);display:flex;align-items:center;justify-content:center;font-size:.8rem;margin-right:-8px}.hero-proof-avatar:last-child{margin-right:0}.hero-tracks{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:18px}.track-card{display:flex;align-items:center;gap:12px;min-width:280px;padding:14px 20px;text-align:left;background:var(--card);border:1px solid var(--border);border-radius:14px;color:var(--text);transition:all .15s}.track-card:hover{transform:translateY(-3px);border-color:var(--primary);box-shadow:0 14px 40px #facc151f}.track-card.react:hover{border-color:var(--accent);box-shadow:0 14px 40px #38bdf824}.track-card-icon{font-size:1.6rem}.track-card-body{display:flex;flex-direction:column;flex:1}.track-card-body strong{font-size:1rem}.track-card-body small{color:var(--text-dim);font-size:.78rem}.track-card-arrow{color:var(--text-dim);font-weight:700}.track-card:hover .track-card-arrow{color:var(--primary)}.track-card.react:hover .track-card-arrow{color:var(--accent)}.track-switch{display:inline-flex;gap:5px;padding:5px;background:var(--card);border:1px solid var(--border);border-radius:12px;margin-bottom:20px}.track-btn{padding:9px 22px;border:none;border-radius:9px;background:transparent;color:var(--text-dim);font-weight:700;font-size:.95rem;transition:all .15s}.track-btn:hover:not(.active){color:var(--text)}.track-btn.active{background:var(--primary);color:#1a1a06;box-shadow:0 4px 16px #facc154d}.code-window{max-width:620px;margin:60px auto 0;background:#0d1322;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:0 30px 80px #00000073;text-align:left}.code-titlebar{display:flex;align-items:center;gap:7px;padding:12px 16px;background:var(--bg-soft);border-bottom:1px solid var(--border)}.dot{width:11px;height:11px;border-radius:50%}.dot.red{background:#ff5f57}.dot.yellow{background:#febc2e}.dot.green{background:#28c840}.code-filename{margin-left:10px;color:var(--text-dim);font-size:.8rem;font-family:var(--mono)}.code-window pre{padding:20px;font-family:var(--mono);font-size:.86rem;color:#a5d6ff;overflow-x:auto}.stats-strip{display:flex;justify-content:center;gap:clamp(30px,8vw,90px);padding:46px 20px;margin-top:50px;border-top:1px solid var(--border);border-bottom:1px solid var(--border);background:var(--bg-soft);flex-wrap:wrap;text-align:center}.stats-strip strong{display:block;font-size:2rem;color:var(--primary)}.stats-strip span{color:var(--text-dim);font-size:.9rem}.section{max-width:1100px;margin:0 auto;padding:90px 24px}.section h2{text-align:center;font-size:clamp(1.7rem,4vw,2.4rem);margin-bottom:48px}.feature-grid{display:grid;gap:22px;grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}.feature-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:28px;transition:transform .15s,border-color .15s}.feature-card:hover{transform:translateY(-4px);border-color:var(--primary)}.feature-icon{font-size:2rem;margin-bottom:14px}.feature-card h3{margin-bottom:8px;font-size:1.1rem}.feature-card p{color:var(--text-dim);font-size:.95rem}.roadmap{max-width:700px;margin:0 auto;display:flex;flex-direction:column;gap:4px}.roadmap-step{display:flex;gap:20px;align-items:flex-start;padding:20px;border-radius:var(--radius);transition:background .15s}.roadmap-step:hover{background:var(--card)}.roadmap-num{flex-shrink:0;width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));color:#111;font-weight:700;display:flex;align-items:center;justify-content:center}.roadmap-step h4{font-size:1.05rem}.roadmap-step p{color:var(--text-dim);font-size:.9rem}.cta-final{text-align:center;padding:100px 20px}.cta-final h2{font-size:clamp(1.8rem,4.5vw,2.6rem);margin-bottom:30px}.hero-tagline{font-size:1.15rem;font-weight:700;margin:-16px 0 34px;color:var(--text)}.hero-tagline code{font-family:var(--mono);color:var(--primary);font-size:.95em;background:#facc151a;padding:2px 8px;border-radius:7px;border:1px solid rgba(250,204,21,.25)}.footer-big{border-top:1px solid var(--border);background:linear-gradient(180deg,var(--bg),#080b14);margin-top:20px}.footer-grid{max-width:1100px;margin:0 auto;display:grid;gap:40px;grid-template-columns:2fr 1fr 1fr 1fr;padding:56px 24px 40px}.footer-brand-col{display:flex;flex-direction:column;gap:12px}.footer-brand{display:flex;align-items:center;gap:9px;font-weight:700;font-size:1.35rem;color:var(--text)}.footer-tagline{font-size:1.05rem;font-weight:700;color:var(--text)}.footer-tagline code{font-family:var(--mono);color:var(--primary);font-size:.9em;background:#facc151a;padding:1px 7px;border-radius:6px}.footer-mini{color:var(--text-dim);font-size:.88rem;line-height:1.6;max-width:300px}.footer-stack{font-family:var(--mono);font-size:.72rem;color:var(--text-dim);opacity:.75;letter-spacing:.5px}.footer-col{display:flex;flex-direction:column;gap:10px}.footer-col h4{font-size:.72rem;letter-spacing:1.6px;text-transform:uppercase;color:var(--text-dim);margin-bottom:4px}.footer-col a{color:#b7c2d8;font-size:.9rem;transition:color .12s}.footer-col a:hover{color:var(--primary)}.footer-bottom{max-width:1100px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;padding:20px 24px 26px;border-top:1px solid var(--border);color:var(--text-dim);font-size:.85rem}.footer-bottom a{color:var(--primary);font-weight:600}.footer-bottom a:hover{text-decoration:underline}@media (max-width: 820px){.footer-grid{grid-template-columns:1fr 1fr;padding-top:40px}.footer-brand-col{grid-column:1 / -1}.footer-bottom{justify-content:center;text-align:center}}.footer{text-align:center;padding:30px;color:var(--text-dim);border-top:1px solid var(--border);font-size:.9rem}.page{max-width:1100px;margin:0 auto;padding:44px 24px 80px}.page h1{font-size:2rem;margin-bottom:6px;text-transform:capitalize}.page-sub{color:var(--text-dim);margin-bottom:28px}.page-loader{text-align:center;padding:120px;color:var(--text-dim)}.empty{color:var(--text-dim);padding:16px 0}.back-link{display:inline-block;color:var(--text-dim);margin-bottom:18px;background:none;border:none;font-size:.95rem}.back-link:hover{color:var(--primary)}.search-input{width:100%;padding:14px 18px;margin-bottom:20px;background:var(--card);border:1px solid var(--border);border-radius:10px;color:var(--text);font-size:1rem}.search-input:focus{outline:none;border-color:var(--primary)}.chip-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}.chip{padding:8px 15px;border-radius:100px;background:var(--card);color:var(--text-dim);border:1px solid var(--border);font-size:.88rem;transition:all .12s}.chip.small{padding:5px 12px;font-size:.8rem}.chip:hover{color:var(--text)}.chip.active{background:var(--primary);color:#1a1a06;border-color:var(--primary);font-weight:600}.concept-grid{display:grid;gap:16px;margin-top:22px;grid-template-columns:repeat(auto-fill,minmax(270px,1fr))}.concept-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;color:var(--text);transition:transform .13s,border-color .13s}.concept-card:hover{transform:translateY(-3px);border-color:var(--accent)}.concept-card-top{display:flex;justify-content:space-between;margin-bottom:10px}.concept-card h3{font-size:1.02rem;margin-bottom:8px}.concept-cat{color:var(--text-dim);font-size:.8rem}.level-badge{font-size:.7rem;font-weight:700;text-transform:uppercase;padding:3px 9px;border-radius:100px;letter-spacing:.4px}.level-badge.basic{background:#34d39926;color:var(--green)}.level-badge.intermediate{background:#38bdf826;color:var(--accent)}.level-badge.advanced{background:#f8717126;color:var(--red)}.done-badge{font-size:.75rem;color:var(--green);font-weight:600}.done-badge.bookmark{color:var(--primary)}.detail-header{margin-bottom:30px}.detail-header h1{margin:10px 0 16px;text-transform:none}.detail-actions{display:flex;gap:10px}.detail-section{margin-bottom:36px}.detail-section h2{font-size:1.2rem;margin-bottom:14px}.explanation{color:var(--text);font-size:1.05rem;max-width:800px}.code-block{background:#0d1322;border:1px solid var(--border);border-radius:var(--radius);padding:22px;font-family:var(--mono);font-size:.88rem;color:#a5d6ff;overflow-x:auto;line-height:1.7}.qa{background:var(--card);border:1px solid var(--border);border-radius:10px;margin-bottom:10px;overflow:hidden}.qa summary{padding:15px 18px;cursor:pointer;font-weight:600;list-style:none;position:relative}.qa summary:after{content:"+";position:absolute;right:18px;color:var(--primary)}.qa[open] summary:after{content:"−"}.qa p{padding:0 18px 16px;color:var(--text-dim)}.questions-page{max-width:880px}.qbank-toolbar{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin:18px 0 16px}.qbank-count{color:var(--text-dim);font-size:.9rem}.qbank-count strong{color:var(--primary)}.qbank-list{display:flex;flex-direction:column;gap:10px}.qbank-item summary{display:flex;align-items:center;gap:10px;padding-right:44px;line-height:1.5}.qbank-item summary .level-badge{margin-left:auto;flex-shrink:0}.qbank-num{font-family:var(--mono);color:var(--primary);font-size:.8rem;flex-shrink:0}.qbank-answer{color:var(--text)!important;line-height:1.7}.qbank-source{font-size:.8rem!important;border-top:1px dashed var(--border);margin:0 18px;padding:10px 0 14px!important}.qbank-source a{color:var(--accent)}.qbank-source a:hover{text-decoration:underline}.auth-page{display:flex;justify-content:center;padding:70px 20px}.auth-card{width:100%;max-width:400px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:34px;display:flex;flex-direction:column;gap:16px}.auth-card h2{font-size:1.5rem}.auth-sub{color:var(--text-dim);font-size:.92rem;margin-top:-10px}.auth-card label{display:flex;flex-direction:column;gap:6px;font-size:.88rem;color:var(--text-dim)}.auth-card input{padding:12px 14px;border-radius:8px;background:var(--bg-soft);border:1px solid var(--border);color:var(--text);font-size:.95rem}.auth-card input:focus{outline:none;border-color:var(--primary)}.auth-switch{font-size:.88rem;color:var(--text-dim);text-align:center}.alert{background:#f871711f;color:var(--red);padding:11px 14px;border-radius:8px;font-size:.88rem;border:1px solid rgba(248,113,113,.3)}.alert.success{background:#34d3991f;color:var(--green);border-color:#34d3994d}.quiz-cat-grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}.quiz-cat-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:26px;text-align:left;color:var(--text);transition:all .13s}.quiz-cat-card:hover{border-color:var(--primary);transform:translateY(-3px)}.quiz-cat-card h3{text-transform:capitalize;margin-bottom:4px}.quiz-cat-card span{color:var(--text-dim);font-size:.85rem}.quiz-question{margin-bottom:26px}.quiz-q-text{font-weight:600;margin-bottom:12px;font-size:1.02rem}.quiz-options{display:grid;gap:8px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}.quiz-option{padding:13px 16px;border-radius:10px;text-align:left;background:var(--card);border:1px solid var(--border);color:var(--text);font-size:.93rem;font-family:var(--mono)}.quiz-option:hover{border-color:var(--accent)}.quiz-option.selected{border-color:var(--primary);background:#facc1514}.confetti{position:fixed;top:0;right:0;bottom:0;left:0;pointer-events:none;z-index:999;overflow:hidden}.confetti-piece{position:absolute;top:-20px;border-radius:2px;animation:confettiFall linear forwards}.confetti-piece.round{border-radius:50%}@keyframes confettiFall{0%{transform:translateY(-20px) rotate(0);opacity:1}80%{opacity:1}to{transform:translateY(105vh) rotate(720deg);opacity:0}}.result-hero{text-align:center;padding:30px 24px 34px;margin-bottom:36px;background:linear-gradient(165deg,var(--card),#10182b);border:1px solid transparent;background:linear-gradient(165deg,var(--card),#10182b) padding-box,linear-gradient(140deg,#facc1580,#38bdf859) border-box;border-radius:22px;display:flex;flex-direction:column;align-items:center;gap:12px;animation:fadeUp .5s ease both}:root[data-theme=light] .result-hero{background:linear-gradient(165deg,var(--card),var(--card)) padding-box,linear-gradient(140deg,#d99e0080,#0284c759) border-box}.result-emoji{font-size:3rem;animation:splashFloat 2.4s ease-in-out infinite}.result-ring{width:130px;height:130px;border-radius:50%;background:conic-gradient(var(--primary) calc(var(--pct) * 1%),var(--bg-soft) 0);display:flex;align-items:center;justify-content:center;animation:fadeUp .7s ease both}.result-ring:before{content:"";position:absolute;width:104px;height:104px;border-radius:50%;background:var(--card)}.result-pct{position:relative;font-size:1.8rem;font-weight:700;color:var(--primary)}.result-hero h1{font-size:1.8rem;margin:4px 0 0}.result-breakdown{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin:8px 0 4px}.rb-chip{padding:6px 14px;border-radius:100px;font-size:.85rem;font-weight:600;background:var(--bg-soft);border:1px solid var(--border);color:var(--text-dim)}.rb-chip.ok{color:var(--green);background:#34d3991a;border-color:#34d3994d}.rb-chip.bad{color:var(--red);background:#f871711a;border-color:#f871714d}.rb-chip.skip{color:var(--primary);background:#facc151a;border-color:#facc154d}.result-review-title{font-size:1.2rem;margin-bottom:16px}.review-correct{color:var(--green)}.review-card{background:var(--card);border:1px solid var(--border);border-left:4px solid var(--green);border-radius:10px;padding:18px;margin-bottom:12px}.review-card.bad{border-left-color:var(--red)}.review-q{font-weight:600;margin-bottom:6px}.review-exp{color:var(--text-dim);font-size:.88rem;margin-top:6px}.quiz-nav{display:flex;gap:12px;margin-top:20px}.dash-grid{display:grid;gap:16px;margin-bottom:40px;grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}.dash-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;display:flex;flex-direction:column;gap:4px}.dash-num{font-size:2rem;font-weight:700;color:var(--primary)}.dash-label{color:var(--text-dim);font-size:.88rem}.progress-bar{height:8px;border-radius:100px;background:var(--bg-soft);margin-top:12px;overflow:hidden}.progress-fill{height:100%;border-radius:100px;background:linear-gradient(90deg,var(--primary),var(--accent));transition:width .4s}.dash-catprogress{margin-bottom:40px}.dash-catprogress h2{font-size:1.15rem;margin-bottom:16px}.catprog-grid{display:grid;gap:12px;grid-template-columns:repeat(auto-fill,minmax(320px,1fr))}.catprog-row{display:flex;align-items:center;gap:14px;background:var(--card);border:1px solid var(--border);border-radius:12px;padding:14px 16px;color:var(--text);transition:all .13s}.catprog-row:hover{border-color:var(--primary);transform:translateY(-2px)}.catprog-icon{font-size:1.4rem;flex-shrink:0}.catprog-mid{flex:1;min-width:0;display:flex;flex-direction:column;gap:7px}.catprog-top{display:flex;justify-content:space-between;align-items:center}.catprog-name{font-size:.9rem;font-weight:600}.catprog-count{font-family:var(--mono);font-size:.78rem;color:var(--text-dim)}.catprog-done{font-size:1.1rem}.progress-fill.full{background:linear-gradient(90deg,var(--green),var(--accent))}.concepts-progress{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:16px 20px;margin-bottom:22px}.concepts-progress-row{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px;font-size:.92rem;color:var(--text-dim)}.concepts-progress-row strong{color:var(--text)}.concepts-progress-pct{font-family:var(--mono);font-weight:700;color:var(--primary);font-size:1.05rem}.progress-bar.big{height:10px;margin-top:0}.dash-columns{display:grid;gap:40px;grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}.dash-columns h2{font-size:1.15rem;margin-bottom:14px}.history-row{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;background:var(--card);border:1px solid var(--border);border-radius:10px;margin-bottom:8px}.history-cat{text-transform:capitalize;font-weight:600}.history-score{color:var(--text-dim)}.history-score.good{color:var(--green);font-weight:700}.history-date{color:var(--text-dim);font-size:.82rem}.history-row.clickable{color:var(--text);transition:all .13s}.history-row.clickable:hover{border-color:var(--primary);transform:translate(4px)}.history-arrow{color:var(--text-dim);font-weight:700}.history-row.clickable:hover .history-arrow{color:var(--primary)}.history-hint{color:var(--text-dim);font-size:.8rem;padding-top:4px}.bookmark-row{display:block;padding:12px 16px;margin-bottom:8px;background:var(--card);border:1px solid var(--border);border-radius:10px;color:var(--text);text-transform:capitalize}.bookmark-row:hover{border-color:var(--primary)}.dash-actions{display:flex;gap:12px;margin-top:40px;flex-wrap:wrap}.chat-layout{display:flex;height:calc(100vh - 61px);overflow:hidden;background:var(--bg)}.chat-sidebar{width:264px;flex-shrink:0;background:#0b0f1a;border-right:1px solid var(--border);display:flex;flex-direction:column;padding:14px 10px 0}.chat-new{margin-bottom:12px;width:100%}.chat-conv-list{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:3px}.chat-conv-empty{color:var(--text-dim);font-size:.82rem;padding:8px 6px}.chat-conv{display:flex;align-items:center;gap:10px;width:100%;background:none;border:1px solid transparent;border-radius:10px;padding:9px 10px;color:var(--text-dim);text-align:left;transition:all .12s}.chat-conv:hover{background:var(--card);color:var(--text)}.chat-conv.active{background:var(--card);color:var(--text);border-color:#facc1559}.chat-conv-icon{flex-shrink:0}.chat-conv-body{flex:1;min-width:0;display:flex;flex-direction:column;gap:1px}.chat-conv-title{font-size:.85rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chat-conv-date{font-size:.7rem;opacity:.65}.chat-conv-delete{opacity:0;font-size:.8rem;flex-shrink:0}.chat-conv:hover .chat-conv-delete{opacity:.7}.chat-conv-delete:hover{opacity:1!important}.chat-sidebar-foot{padding:12px 8px;border-top:1px solid var(--border);color:var(--text-dim);font-size:.78rem}.chat-main{flex:1;min-width:0;display:flex;flex-direction:column;padding:0 22px 20px;max-width:860px;margin:0 auto;width:100%}.chat-topbar{display:flex;align-items:center;gap:12px;padding:13px 0 11px;border-bottom:1px solid var(--border);margin-bottom:6px}.chat-topbar-title{font-weight:700;font-size:1rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chat-burger{display:none;background:var(--card);border:1px solid var(--border);color:var(--text);border-radius:8px;padding:5px 11px;font-size:1rem}.chat-avatar{flex-shrink:0;width:32px;height:32px;border-radius:50%;background:var(--card);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:.95rem;margin-top:3px}.chat-msg{gap:10px}.chat-window{flex:1;overflow-y:auto;padding:10px 4px;display:flex;flex-direction:column;gap:14px}@media (max-width: 800px){.chat-sidebar{position:fixed;left:0;top:61px;bottom:0;z-index:60;transform:translate(-100%);transition:transform .25s;box-shadow:20px 0 50px #00000080}.chat-sidebar.open{transform:translate(0)}.chat-burger{display:block}}.chat-msg{display:flex}.chat-msg.user{justify-content:flex-end}.chat-bubble{max-width:78%;padding:13px 17px;border-radius:16px;font-size:.95rem;white-space:pre-wrap;word-break:break-word}.chat-msg.assistant .chat-bubble{background:var(--card);border:1px solid var(--border);border-bottom-left-radius:4px}.chat-msg.user .chat-bubble{background:var(--primary);color:#1a1a06;border-bottom-right-radius:4px;font-weight:500}.chat-bubble.typing{color:var(--text-dim);font-style:italic}.md{display:flex;flex-direction:column;gap:10px}.md-p{margin:0}.md-heading{margin:4px 0 0;font-weight:700;color:var(--primary)}.md-list{margin:0;padding-left:22px;display:flex;flex-direction:column;gap:5px}.md-inline-code{font-family:var(--mono);font-size:.86em;background:#38bdf81f;color:var(--accent);padding:1.5px 6px;border-radius:5px}.md-code{position:relative;background:#0d1322;border:1px solid var(--border);border-radius:10px;padding:14px 16px;overflow-x:auto;font-family:var(--mono);font-size:.84rem;line-height:1.65;color:#a5d6ff;margin:2px 0}.md-code-lang{position:absolute;top:6px;right:10px;font-size:.65rem;color:var(--text-dim);text-transform:uppercase;letter-spacing:1px}.chat-msg.assistant .chat-bubble{max-width:88%}.chat-suggestions{display:flex;gap:8px;flex-wrap:wrap;padding:12px 0}.chat-input-row{display:flex;gap:10px}.chat-input-row input{flex:1;padding:14px 18px;border-radius:12px;background:var(--card);border:1px solid var(--border);color:var(--text);font-size:.97rem}.chat-input-row input:focus{outline:none;border-color:var(--primary)}@keyframes fadeUp{0%{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}@keyframes float{0%,to{transform:translate(0)}50%{transform:translate(30px,-40px)}}.hero>*{animation:fadeUp .7s ease both}.hero .hero-badge{animation-delay:.05s}.hero h1{animation-delay:.15s}.hero .hero-sub{animation-delay:.25s}.hero .hero-cta{animation-delay:.35s}.hero .code-window{animation-delay:.5s}.landing{position:relative}.orb{position:absolute;border-radius:50%;filter:blur(90px);opacity:.16;pointer-events:none;z-index:0;animation:float 14s ease-in-out infinite}.orb-1{width:420px;height:420px;background:#facc15;top:-80px;left:-120px}.orb-2{width:380px;height:380px;background:#38bdf8;top:500px;right:-140px;animation-delay:4s}.orb-3{width:340px;height:340px;background:#a78bfa;top:1400px;left:-100px;animation-delay:8s}.landing section{position:relative;z-index:1}.btn-primary{box-shadow:0 0 24px #facc1540}.btn-primary:hover{box-shadow:0 0 36px #facc1573}.preview-grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}.preview-card{background:linear-gradient(160deg,var(--card),#10182b);border:1px solid var(--border);border-radius:var(--radius);padding:26px;color:var(--text);display:flex;flex-direction:column;gap:10px;transition:transform .15s,border-color .15s,box-shadow .15s}.preview-card:hover{transform:translateY(-5px);border-color:var(--accent);box-shadow:0 18px 44px #38bdf81f}.preview-top{display:flex;justify-content:space-between;align-items:center}.preview-icon{font-size:1.7rem}.preview-card h3{font-size:1.15rem}.preview-card p{color:var(--text-dim);font-size:.92rem;flex:1}.preview-link{color:var(--accent);font-size:.88rem;font-weight:600}.center-cta{text-align:center;margin-top:34px}.seo-intro{padding-top:70px;padding-bottom:40px}.seo-text{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:18px}.seo-text p{color:var(--text-dim);font-size:1.08rem;line-height:1.8;text-align:center}.seo-text strong{color:var(--text)}.pg-promo{display:grid;gap:46px;align-items:center;grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}.pg-promo-text h2{margin-bottom:18px}.pg-promo-text p{color:var(--text-dim);margin-bottom:26px;font-size:1.05rem}.pg-promo-text code{background:var(--bg-soft);padding:2px 7px;border-radius:6px;font-family:var(--mono);color:var(--primary);font-size:.9em}.pg-promo-window{margin:0}.playground{display:flex;height:calc(100vh - 61px);overflow:hidden;background:#0d1117}.pg-sidebar{width:248px;flex-shrink:0;background:#0b0f1a;border-right:1px solid var(--border);display:flex;flex-direction:column}.pg-seg{display:grid;grid-template-columns:1fr 1fr;gap:5px;margin:12px 10px;padding:4px;background:var(--bg-soft);border:1px solid var(--border);border-radius:10px}.pg-seg button{padding:8px 4px;border:none;border-radius:7px;background:transparent;color:var(--text-dim);font-size:.83rem;font-weight:600;transition:all .15s}.pg-seg button.active{background:var(--card);color:var(--text);box-shadow:0 2px 10px #00000059}.pg-seg button:hover:not(.active){color:var(--text)}.pg-seg.three{grid-template-columns:1fr 1fr 1fr}.pg-seg.three button{display:flex;flex-direction:column;align-items:center;gap:2px;padding:7px 2px}.pg-seg.three button small{font-size:.68rem;font-weight:600}.pg-req-list{padding-left:18px;display:flex;flex-direction:column;gap:8px}.pg-req-list li{color:#c3cde0;font-size:.85rem;line-height:1.55}.pg-req-list li::marker{color:var(--primary)}.pg-scroll{flex:1;overflow-y:auto;padding:0 10px 10px}.pg-count-line{display:flex;justify-content:space-between;align-items:center;font-size:.68rem;letter-spacing:1.2px;text-transform:uppercase;color:var(--text-dim);padding:12px 6px 8px}.pg-count-solved{color:var(--green);letter-spacing:.4px}.pg-myfiles-line{border-top:1px solid var(--border);margin-top:14px;padding-top:14px}.pg-empty-hint{color:var(--text-dim);font-size:.78rem;padding:2px 6px 8px;line-height:1.5}.pg-problem-item{display:flex;align-items:center;gap:10px;width:100%;background:none;border:1px solid transparent;border-radius:9px;padding:9px 10px;margin-bottom:3px;color:var(--text-dim);text-align:left;transition:all .12s}.pg-problem-item:hover{background:var(--card);color:var(--text)}.pg-problem-item.active{background:var(--card);color:var(--text);border-color:#facc1559}.pg-problem-num{font-family:var(--mono);font-size:.7rem;color:var(--text-dim);opacity:.7;flex-shrink:0}.pg-problem-name{flex:1;font-size:.85rem;line-height:1.35;display:flex;flex-direction:column;gap:3px;min-width:0}.diff-chip{align-self:flex-start;font-size:.6rem;font-weight:700;text-transform:uppercase;letter-spacing:.6px;padding:1.5px 7px;border-radius:100px}.diff-chip.easy{color:var(--green);background:#34d3991f}.diff-chip.medium{color:var(--primary);background:#facc151f}.diff-chip.hard{color:var(--red);background:#f871711f}.pg-solved{color:var(--green);font-weight:700;font-size:.85rem;flex-shrink:0}.pg-new-file{background:none;border:1px solid var(--border);color:var(--text-dim);border-radius:6px;width:22px;height:22px;line-height:1;font-size:.9rem}.pg-new-file:hover{color:var(--primary);border-color:var(--primary)}.pg-file-name{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.pg-file-delete{opacity:0;color:var(--text-dim);font-size:.95rem;padding:0 3px;border-radius:4px}.pg-file:hover .pg-file-delete{opacity:1}.pg-file-delete:hover{color:var(--red)}.pg-file-icon.mine{color:var(--green);background:#34d3991f}.pg-file{display:flex;align-items:center;gap:8px;width:100%;background:none;border:1px solid transparent;color:var(--text-dim);padding:8px 10px;border-radius:9px;font-size:.85rem;text-align:left;font-family:var(--mono);margin-bottom:3px;transition:all .12s}.pg-file:hover{background:var(--card);color:var(--text)}.pg-file.active{background:var(--card);color:var(--primary);border-color:#facc1559}.pg-file-icon{font-size:.6rem;font-weight:700;color:#f7df1e;background:#f7df1e1f;border-radius:4px;padding:2px 4px}.pg-sidebar-hint{padding:12px 16px;color:var(--text-dim);font-size:.76rem;line-height:1.55;border-top:1px solid var(--border);background:#facc1508}.pg-main{flex:1;display:flex;flex-direction:column;min-width:0}.pg-tabbar{display:flex;align-items:center;justify-content:space-between;background:#0b0f1a;border-bottom:1px solid var(--border);padding:0 12px 0 0}.pg-tab{display:flex;align-items:center;gap:8px;padding:10px 20px;font-family:var(--mono);font-size:.85rem;background:#0d1117;color:var(--text);border-right:1px solid var(--border);border-top:2px solid var(--primary)}.pg-tab-icon{font-size:.58rem;font-weight:700;color:#f7df1e;background:#f7df1e1f;border-radius:4px;padding:2px 5px}.pg-actions{display:flex;gap:8px;align-items:center}.btn-run{background:var(--green);color:#06281c;border:none;padding:7px 20px;border-radius:8px;font-weight:700;font-size:.9rem}.btn-run:hover{filter:brightness(1.1)}.btn-run:disabled{opacity:.55}.pg-editor{flex:1;min-height:0}.pg-terminal{height:210px;flex-shrink:0;background:#0b0f1a;border-top:1px solid var(--border);display:flex;flex-direction:column}.pg-terminal-title{display:flex;justify-content:space-between;align-items:center;padding:7px 16px;font-size:.7rem;letter-spacing:1.5px;color:var(--text-dim);border-bottom:1px solid var(--border)}.pg-terminal-actions{display:flex;align-items:center;gap:12px}.pg-running-chip{color:var(--green);letter-spacing:.5px;animation:pulseDot 1.4s ease-in-out infinite}.pg-clear{background:none;border:none;color:var(--text-dim);font-size:.68rem;letter-spacing:1px}.pg-clear:hover{color:var(--red)}.pg-statusbar{display:flex;justify-content:space-between;align-items:center;padding:5px 16px;background:#0b0f1a;border-top:1px solid var(--border);font-size:.7rem;color:var(--text-dim);font-family:var(--mono);flex-shrink:0}.pg-status-right{opacity:.85}.pg-terminal-body{flex:1;overflow-y:auto;padding:12px 16px;font-family:var(--mono);font-size:.86rem;line-height:1.7}.pg-term-placeholder{color:var(--text-dim);font-style:italic}.pg-term-line{white-space:pre-wrap;word-break:break-word}.pg-term-line.log,.pg-term-line.info{color:#a5d6ff}.pg-term-line.warn{color:var(--primary)}.pg-term-line.error{color:var(--red)}.pg-term-line.sys{color:var(--text-dim)}.pg-problem{width:330px;flex-shrink:0;overflow-y:auto;background:linear-gradient(180deg,#0c1120,#0b0f1a);border-right:1px solid var(--border);padding:22px 20px;display:flex;flex-direction:column;gap:20px}.pg-problem-head{padding-bottom:16px;border-bottom:1px solid var(--border)}.pg-problem-title-row{display:flex;align-items:center;justify-content:space-between;gap:10px}.pg-problem-title-row h2{font-size:1.18rem;line-height:1.3}.pg-problem-section h5{font-size:.68rem;letter-spacing:1.4px;text-transform:uppercase;color:var(--text-dim);margin-bottom:8px}.pg-problem-statement{color:#c3cde0;font-size:.89rem;line-height:1.7;white-space:pre-wrap}.pg-problem-section pre{background:#0d1322;border:1px solid var(--border);border-left:3px solid var(--accent);border-radius:8px;padding:12px 14px;margin:8px 0;font-family:var(--mono);font-size:.79rem;color:#a5d6ff;overflow-x:auto;white-space:pre-wrap;line-height:1.6}.pg-problem-foot{margin-top:auto;padding-top:16px;border-top:1px solid var(--border)}.pg-problem-foot .btn{width:100%}.btn-test{background:transparent;color:var(--green);border:1px solid var(--green);padding:6px 16px;border-radius:8px;font-weight:700;font-size:.88rem}.btn-test:hover{background:#34d3991f}.btn-test:disabled{opacity:.55}.btn-submit{background:linear-gradient(135deg,var(--primary),#f59e0b);color:#1a1a06;border:none;padding:7px 18px;border-radius:8px;font-weight:700;font-size:.88rem;box-shadow:0 4px 18px #facc154d}.btn-submit:hover{filter:brightness(1.08)}.btn-submit:disabled{opacity:.55}.sub-solved-flag{color:var(--green);font-size:.65rem;letter-spacing:1px;background:#34d3991f;border:1px solid rgba(52,211,153,.3);padding:2px 8px;border-radius:100px;margin-left:8px}.sub-empty{font-size:.8rem!important}.sub-list{display:flex;flex-direction:column;gap:6px}.sub-row{display:flex;justify-content:space-between;align-items:center;background:#0d1322;border:1px solid var(--border);border-left:3px solid var(--red);border-radius:8px;padding:9px 12px;font-size:.8rem;color:var(--text);text-align:left;transition:all .12s}.sub-row.accepted{border-left-color:var(--green)}.sub-row:hover{border-color:var(--primary);transform:translate(3px)}.sub-status{font-weight:700;font-family:var(--mono)}.sub-row.accepted .sub-status{color:var(--green)}.sub-row.failed .sub-status{color:var(--red)}.sub-time{color:var(--text-dim);font-size:.72rem}.pgb-solved{color:var(--primary);font-weight:700}@media (max-width: 900px){.pg-problem{display:none}}@media (max-width: 720px){.pg-sidebar{display:none}}.grid-bg{position:absolute;top:0;right:0;bottom:0;left:0;height:900px;pointer-events:none;background-image:linear-gradient(rgba(148,163,184,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(148,163,184,.05) 1px,transparent 1px);background-size:44px 44px;-webkit-mask-image:radial-gradient(ellipse 70% 55% at 50% 0%,black 35%,transparent 75%);mask-image:radial-gradient(ellipse 70% 55% at 50% 0%,black 35%,transparent 75%)}.reveal{opacity:0;transform:translateY(26px);transition:opacity .6s ease,transform .6s ease}.reveal.revealed{opacity:1;transform:translateY(0)}.preview-grid>.reveal,.feature-grid>.reveal,.testi-grid>.reveal,.cat-grid>.reveal{height:100%;display:flex}.preview-grid>.reveal>.preview-card,.feature-grid>.reveal>.feature-card,.testi-grid>.reveal>.testi-card,.cat-grid>.reveal>.cat-card{width:100%;height:100%}.floater{position:absolute;font-family:var(--mono);font-size:.85rem;color:var(--text-dim);opacity:0;pointer-events:none;-webkit-user-select:none;user-select:none;left:calc(4% + (var(--i) * 8%));top:calc(12% + ((var(--i) * 37) % 60) * 1%);animation:floaterDrift 11s ease-in-out infinite;animation-delay:calc(var(--i) * -1.3s)}@keyframes floaterDrift{0%,to{transform:translateY(0) rotate(-3deg);opacity:.13}50%{transform:translateY(-26px) rotate(3deg);opacity:.32}}.pulse-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--green);margin-right:8px;animation:pulseDot 1.6s ease-in-out infinite}@keyframes pulseDot{0%,to{box-shadow:0 0 #34d39980}50%{box-shadow:0 0 0 7px #34d39900}}.gradient-text.shimmer{background:linear-gradient(90deg,#facc15,#38bdf8,#a78bfa,#facc15);background-size:300% 100%;-webkit-background-clip:text;background-clip:text;animation:shimmerText 6s linear infinite}@keyframes shimmerText{to{background-position:300% 0}}.btn-glow{position:relative}.btn-glow:after{content:"";position:absolute;top:-3px;right:-3px;bottom:-3px;left:-3px;border-radius:13px;z-index:-1;background:linear-gradient(90deg,#facc15,#38bdf8);filter:blur(14px);opacity:.35;animation:pulseDot 2.4s ease-in-out infinite}.hero-window{min-height:240px}.typing-pre{padding:20px;font-family:var(--mono);font-size:.86rem;color:#a5d6ff;min-height:180px;white-space:pre-wrap;text-align:left}.type-cursor{color:var(--primary);animation:blink .9s step-end infinite}@keyframes blink{50%{opacity:0}}.cat-grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(320px,1fr))}.cat-card{display:flex;align-items:center;gap:16px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:18px 20px;color:var(--text);transition:transform .14s,border-color .14s}.cat-card:hover{transform:translate(5px);border-color:var(--primary)}.cat-icon{font-size:1.7rem}.cat-card h4{font-size:1rem}.cat-card p{color:var(--text-dim);font-size:.82rem}.cat-count{margin-left:auto;flex-shrink:0;font-family:var(--mono);font-weight:700;color:var(--primary);background:#facc151a;border:1px solid rgba(250,204,21,.25);border-radius:100px;padding:4px 12px;font-size:.85rem}.testi-grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(290px,1fr))}.testi-card{background:linear-gradient(160deg,var(--card),#10182b);border:1px solid var(--border);border-radius:var(--radius);padding:26px;display:flex;flex-direction:column;gap:18px;transition:transform .15s,border-color .15s}.testi-card:hover{transform:translateY(-4px);border-color:var(--accent)}.testi-text{color:var(--text);font-size:.97rem;line-height:1.65;flex:1}.testi-who{display:flex;align-items:center;gap:12px}.testi-avatar{font-size:1.6rem;width:46px;height:46px;border-radius:50%;background:var(--bg-soft);border:1px solid var(--border);display:flex;align-items:center;justify-content:center}.testi-who strong{display:block;font-size:.95rem}.testi-who span{color:var(--text-dim);font-size:.8rem}.faq-section{max-width:760px}.faq summary{font-size:1rem}.qa.faq{margin-bottom:12px}.cta-final{padding:60px 20px 100px}.cta-box{position:relative;overflow:hidden;max-width:1080px;margin:0 auto;border:1px solid transparent;background:linear-gradient(100deg,#141c30,#0c1120 75%) padding-box,linear-gradient(120deg,#facc1599,#38bdf873,#a78bfa59) border-box;border-radius:22px;padding:48px 54px;display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap;text-align:left;box-shadow:0 40px 110px #0000008c,inset 0 1px #ffffff0a}.cta-left{flex:1;min-width:320px;display:flex;flex-direction:column;gap:16px}.cta-title-row{display:flex;align-items:center;gap:18px}.cta-right{display:flex;flex-direction:column;gap:12px;align-items:stretch;flex-shrink:0;min-width:260px}.cta-right .btn{text-align:center}.cta-rays{position:absolute;inset:-120px -60px auto;height:340px;background:radial-gradient(ellipse 60% 70% at 50% 0%,rgba(250,204,21,.16),transparent 70%),radial-gradient(ellipse 40% 55% at 20% 10%,rgba(56,189,248,.12),transparent 70%);pointer-events:none}.cta-box>*{position:relative}.cta-box h2{margin:0;font-size:clamp(1.5rem,3.2vw,2.1rem);line-height:1.25}.cta-sub{color:var(--text-dim);max-width:520px;font-size:1rem}.cta-checks{display:flex;gap:12px;flex-wrap:wrap}.cta-checks span{color:var(--green);font-size:.88rem;font-weight:600;background:#34d39914;border:1px solid rgba(52,211,153,.25);padding:6px 14px;border-radius:100px}.cta-terminal{font-family:var(--mono);font-size:.8rem;color:var(--text-dim);text-align:center;background:#0a0e18;border:1px solid var(--border);border-radius:10px;padding:10px 16px}.cta-prompt{color:var(--accent)}.cta-ok{color:var(--green)}.footer{display:flex;flex-direction:column;gap:8px;align-items:center}.footer-brand{display:flex;align-items:center;gap:8px;font-weight:700;color:var(--text)}.footer-code{font-family:var(--mono);color:var(--primary);font-size:.82rem;opacity:.8}.footer-dev{font-size:.9rem}.footer-dev a{color:var(--primary);font-weight:600}.footer-dev a:hover{text-decoration:underline}.dev-card{display:flex;gap:40px;align-items:center;flex-wrap:wrap;max-width:900px;margin:0 auto;background:linear-gradient(160deg,var(--card),#10182b);border:1px solid transparent;background:linear-gradient(160deg,var(--card),#10182b) padding-box,linear-gradient(140deg,#facc1573,#38bdf859) border-box;border-radius:22px;padding:40px;box-shadow:0 26px 80px #00000073}.dev-photo-wrap{position:relative;flex-shrink:0;margin:0 auto}.dev-photo{width:200px;height:200px;border-radius:24px;object-fit:cover;border:2px solid var(--border);position:relative;z-index:1}.dev-photo-glow{position:absolute;top:-16px;right:-16px;bottom:-16px;left:-16px;border-radius:32px;z-index:0;background:linear-gradient(135deg,#facc1559,#38bdf84d);filter:blur(26px);animation:pulseDot 3s ease-in-out infinite}.dev-info{flex:1;min-width:280px}.dev-info h3{font-size:1.6rem;margin-bottom:2px}.dev-role{color:var(--accent);font-weight:600;font-size:.92rem;margin-bottom:14px}.dev-desc{color:var(--text-dim);line-height:1.7;font-size:.97rem;margin-bottom:16px}.dev-desc strong{color:var(--text)}.dev-tech{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:20px}.dev-links{display:flex;gap:10px;flex-wrap:wrap}.dev-section-sub{text-align:center;color:var(--text-dim);margin:-34px 0 40px;font-size:.95rem}.profile-page{max-width:860px}.profile-card{display:flex;align-items:center;gap:24px;flex-wrap:wrap;background:var(--card);border:1px solid var(--border);border-radius:18px;padding:28px 30px;margin-bottom:30px}.profile-avatar{width:84px;height:84px;border-radius:50%;flex-shrink:0;background:linear-gradient(135deg,var(--primary),var(--accent));color:#111;font-weight:700;font-size:2.2rem;display:flex;align-items:center;justify-content:center;box-shadow:0 12px 34px #facc1540}.profile-avatar-wrap{position:relative;flex-shrink:0}.profile-avatar-img{object-fit:cover;border:2px solid var(--border)}.avatar-edit{position:absolute;bottom:-4px;right:-4px;width:32px;height:32px;border-radius:50%;background:var(--card);border:1px solid var(--border);font-size:.9rem;display:flex;align-items:center;justify-content:center;transition:all .15s}.avatar-edit:hover{border-color:var(--primary);transform:scale(1.1)}.avatar-edit:disabled{opacity:.6}.avatar-actions{display:flex;gap:14px;margin-top:6px}.avatar-link{background:none;border:none;padding:0;color:var(--accent);font-size:.83rem;font-weight:600}.avatar-link:hover{text-decoration:underline}.avatar-link.danger{color:var(--red)}.avatar-link:disabled{opacity:.6}.avatar-msg{font-size:.8rem!important;margin-top:2px}.avatar-msg.ok{color:var(--green)!important}.avatar-msg.bad{color:var(--red)!important}.nav-avatar-img{object-fit:cover}.profile-id{display:flex;flex-direction:column;gap:3px;flex:1;min-width:200px}.profile-id h2{font-size:1.4rem}.profile-id span{color:var(--text-dim);font-size:.9rem}.profile-joined{font-size:.82rem!important}.profile-mini-stats{display:flex;gap:26px}.profile-mini-stats div{display:flex;flex-direction:column;align-items:center}.profile-mini-stats strong{font-size:1.35rem;color:var(--primary)}.profile-mini-stats span{color:var(--text-dim);font-size:.75rem}.profile-grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));margin-bottom:30px}.profile-section{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:24px;display:flex;flex-direction:column;gap:14px}.profile-section h3{font-size:1.05rem}.profile-section label{display:flex;flex-direction:column;gap:6px;font-size:.85rem;color:var(--text-dim)}.profile-section input{padding:11px 14px;border-radius:8px;background:var(--bg-soft);border:1px solid var(--border);color:var(--text);font-size:.95rem}.profile-section input:focus{outline:none;border-color:var(--primary)}.profile-section .btn{align-self:flex-start}.profile-section .btn:disabled{opacity:.5;cursor:not-allowed}.profile-links{display:flex;gap:12px;flex-wrap:wrap}.about-page{max-width:960px}.about-hero{display:flex;gap:44px;align-items:center;flex-wrap:wrap;padding:30px 0 40px}.about-photo-wrap{position:relative;flex-shrink:0}.about-photo{width:220px;height:220px;border-radius:28px;object-fit:cover;border:2px solid var(--border);position:relative;z-index:1;box-shadow:0 24px 60px #00000080}.about-photo-fallback{display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--primary),var(--accent));color:#111;font-size:4rem;font-weight:700}.about-photo-glow{position:absolute;top:-18px;right:-18px;bottom:-18px;left:-18px;border-radius:36px;z-index:0;background:linear-gradient(135deg,#facc1559,#38bdf84d);filter:blur(28px);animation:pulseDot 3s ease-in-out infinite}.about-intro{flex:1;min-width:280px}.about-intro h1{font-size:2.6rem;margin:14px 0 4px}.about-role{color:var(--accent);font-weight:600;margin-bottom:14px}.about-summary{color:var(--text-dim);line-height:1.7;margin-bottom:20px}.about-links{display:flex;gap:10px;flex-wrap:wrap}.about-stats{display:flex;gap:clamp(24px,6vw,70px);flex-wrap:wrap;padding:26px 30px;margin-bottom:44px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius)}.about-stats strong{display:block;font-size:1.7rem;color:var(--primary)}.about-stats span{color:var(--text-dim);font-size:.85rem}.about-section{margin-bottom:46px}.about-section h2{font-size:1.35rem;margin-bottom:20px}.about-skill-row{display:flex;gap:16px;align-items:flex-start;margin-bottom:14px;flex-wrap:wrap}.about-skill-group{width:150px;flex-shrink:0;color:var(--text-dim);font-size:.85rem;font-weight:600;padding-top:6px}.about-skill-chips{display:flex;gap:7px;flex-wrap:wrap;flex:1}.about-timeline{display:flex;flex-direction:column;gap:18px}.about-job{background:var(--card);border:1px solid var(--border);border-left:3px solid var(--primary);border-radius:12px;padding:22px 24px}.about-job-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:12px;flex-wrap:wrap}.about-job h3{font-size:1.05rem}.about-job-company{color:var(--text-dim);font-size:.88rem}.about-job-period{font-family:var(--mono);font-size:.78rem;color:var(--primary);background:#facc151a;padding:4px 12px;border-radius:100px;white-space:nowrap}.about-job ul{padding-left:20px;display:flex;flex-direction:column;gap:6px}.about-job li{color:var(--text-dim);font-size:.92rem}.about-projects{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}.about-project{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:20px 22px;transition:transform .14s,border-color .14s}.about-project:hover{transform:translateY(-3px);border-color:var(--accent)}.about-project h3{font-size:.98rem;margin-bottom:4px}.about-project h3 a{color:var(--text)}.about-project h3 a:hover{color:var(--accent)}.about-project-tech{display:block;font-family:var(--mono);font-size:.72rem;color:var(--accent);margin-bottom:8px}.about-project p{color:var(--text-dim);font-size:.88rem}.about-two-col{display:grid;gap:40px;grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}.about-edu{display:flex;flex-direction:column;gap:2px;margin-bottom:14px;padding:14px 18px;background:var(--card);border:1px solid var(--border);border-radius:10px}.about-edu span{color:var(--text-dim);font-size:.83rem}.about-cta{text-align:center;padding:30px 0 10px;display:flex;flex-direction:column;gap:18px;align-items:center}.about-cta p{color:var(--text-dim);font-size:1.05rem}@media (max-width: 720px){.floater{display:none}}.pgb{max-width:1100px;margin:0 auto;padding:44px 24px 80px}.pgb-head h1{font-size:2rem;margin-bottom:6px}.pgb-head p{color:var(--text-dim);margin-bottom:30px}.pgb-tabs{display:grid;gap:14px;margin-bottom:34px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}.pgb-tab{display:flex;flex-direction:column;align-items:flex-start;gap:3px;background:var(--card);border:1px solid var(--border);border-radius:14px;padding:18px 20px;text-align:left;color:var(--text-dim);transition:all .14s}.pgb-tab:hover{border-color:var(--accent);color:var(--text)}.pgb-tab.active{border-color:var(--primary);color:var(--text);background:linear-gradient(160deg,rgba(250,204,21,.08),var(--card));box-shadow:0 10px 30px #0000004d}.pgb-tab-icon{font-size:1.5rem}.pgb-tab-label{font-weight:700;font-size:1.02rem}.pgb-tab-sub{font-size:.8rem;opacity:.8}.pgb-grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}.pgb-card{display:flex;flex-direction:column;gap:10px;background:var(--card);border:1px solid var(--border);border-radius:14px;padding:22px;text-align:left;color:var(--text);transition:all .14s}.pgb-card:hover{transform:translateY(-4px);border-color:var(--primary)}.pgb-card-top{display:flex;justify-content:space-between;align-items:center}.pgb-num{font-family:var(--mono);font-size:.75rem;color:var(--text-dim)}.pgb-card h3{font-size:1.05rem;line-height:1.35}.pgb-card p{color:var(--text-dim);font-size:.87rem;line-height:1.55;flex:1}.pgb-card-foot{display:flex;justify-content:space-between;align-items:center;font-size:.78rem;color:var(--text-dim);padding-top:10px;border-top:1px solid var(--border)}.pgb-started{color:var(--green);font-weight:700}.pgb-card.locked{opacity:.75}.pgb-card.locked:hover{opacity:1;border-color:var(--primary)}.pgb-myfiles-head{display:flex;justify-content:space-between;align-items:center;margin:40px 0 16px}.pgb-myfiles-head h2{font-size:1.2rem}.pgw{display:flex;flex-direction:column;height:calc(100vh - 61px);overflow:hidden;background:#0d1117}.pgw-topbar{display:flex;align-items:center;gap:10px;padding:9px 14px;background:#0b0f1a;border-bottom:1px solid var(--border);flex-wrap:wrap}.pgw-back{background:var(--card);border:1px solid var(--border);color:var(--text);border-radius:8px;padding:5px 13px;font-size:1rem}.pgw-back:hover{border-color:var(--primary);color:var(--primary)}.pgw-title{font-family:var(--mono);font-size:.92rem;font-weight:600}.pgw-actions{margin-left:auto;display:flex;gap:8px;align-items:center;flex-wrap:wrap}.pgw-brief-btn{padding:6px 14px;font-size:.85rem}.pgw-brief-btn.on{border-color:var(--primary);color:var(--primary)}.pgw-body{flex:1;display:flex;min-height:0}.pgw-brief{width:340px;flex-shrink:0;overflow-y:auto;background:linear-gradient(180deg,#0c1120,#0b0f1a);border-right:1px solid var(--border);padding:22px 20px;display:flex;flex-direction:column;gap:20px}.pgw-editorcol{flex:1;min-width:0;display:flex;flex-direction:column}@media (max-width: 800px){.pgw-brief{display:none}}.sb-renamable{cursor:pointer}.sb-renamable:hover{color:var(--primary)}.sb-edit-hint{font-size:.75rem;opacity:0;transition:opacity .15s}.sb-renamable:hover .sb-edit-hint{opacity:.8}.sb-rename-input{background:var(--bg-soft);border:1px solid var(--primary);border-radius:8px;padding:5px 12px;color:var(--text);font-family:var(--mono);font-size:.92rem;min-width:180px}.sb-rename-input:focus{outline:none}.sb-delete-btn:hover{color:var(--red)}.sb-card-edit{opacity:0;font-size:.8rem}.pgb-card:hover .sb-card-edit{opacity:1}.deps-panel{gap:22px}.dep-add{display:flex;gap:8px;margin-bottom:12px}.dep-add input{flex:1;padding:9px 12px;border-radius:8px;background:var(--bg-soft);border:1px solid var(--border);color:var(--text);font-size:.85rem}.dep-add input:focus{outline:none;border-color:var(--primary)}.dep-add .btn{padding:6px 14px}.dep-list{display:flex;flex-direction:column;gap:6px}.dep-row{display:flex;align-items:center;gap:10px;background:#0d1322;border:1px solid var(--border);border-radius:8px;padding:9px 12px}.dep-row.locked{opacity:.65}.dep-name{font-family:var(--mono);font-size:.83rem;color:var(--text);flex:1}.dep-version{font-family:var(--mono);font-size:.72rem;color:var(--text-dim)}.dep-remove{background:none;border:none;font-size:.8rem;opacity:.55;padding:0 2px}.dep-remove:hover{opacity:1}.rlab-sync{font-size:.72rem;color:var(--green);font-weight:700;background:#34d3991a;border:1px solid rgba(52,211,153,.3);padding:3px 10px;border-radius:100px}.rlab-solution-flag{font-size:.72rem;color:var(--primary);font-weight:700;background:#facc151a;border:1px solid rgba(250,204,21,.3);padding:3px 10px;border-radius:100px}.rlab-approach{list-style:decimal}.rlab-editor{flex:1;min-width:0;border-right:1px solid var(--border)}.rlab-preview{width:40%;min-width:320px;flex-shrink:0;display:flex;flex-direction:column;background:#0b0f1a}.rlab-preview-title,.rlab-console-title{display:flex;justify-content:space-between;align-items:center;padding:7px 14px;font-size:.68rem;letter-spacing:1.5px;color:var(--text-dim);border-bottom:1px solid var(--border)}.rlab-live{color:var(--green);letter-spacing:.5px}.rlab-iframe{flex:1;min-height:0;border:none;background:#fff;width:100%}.rlab-console{height:130px;flex-shrink:0;display:flex;flex-direction:column;border-top:1px solid var(--border)}.rlab-console-body{flex:1;overflow-y:auto;padding:8px 14px;font-family:var(--mono);font-size:.78rem;line-height:1.6}@media (max-width: 1000px){.rlab-preview{width:45%;min-width:260px}.rlab-editor{min-width:220px}}@media (max-width: 760px){.pgw-body{flex-direction:column;overflow-y:auto}.rlab-editor{min-height:320px;border-right:none;border-bottom:1px solid var(--border)}.rlab-preview{width:100%;min-height:380px}}.viz-page{max-width:1200px}.viz-layout{display:grid;gap:20px;margin-top:20px;grid-template-columns:minmax(320px,440px) 1fr}.viz-code{background:#0d1322;border:1px solid var(--border);border-radius:14px;overflow:hidden;display:flex;flex-direction:column}.viz-code-title{display:flex;justify-content:space-between;align-items:center;padding:10px 16px;font-size:.7rem;letter-spacing:1.5px;color:var(--text-dim);border-bottom:1px solid var(--border)}.viz-code pre{margin:0;padding:14px 0;font-family:var(--mono);font-size:.88rem;line-height:1.9;overflow-x:auto}.viz-line{padding:0 16px;white-space:pre;color:#a5d6ff;border-left:3px solid transparent;transition:all .25s}.viz-line.active{background:#facc151f;border-left-color:var(--primary);color:#ffe9a8}.viz-lineno{display:inline-block;width:26px;color:#4b5b76;-webkit-user-select:none;user-select:none;font-size:.75rem}.viz-console{border-top:1px solid var(--border)}.viz-console .viz-box-title{padding:10px 16px 4px}.viz-console-body{padding:4px 16px 14px;font-family:var(--mono);font-size:.85rem}.viz-out{color:var(--green);line-height:1.7;animation:fadeUp .3s ease both}.viz-runtime{display:flex;flex-direction:column;gap:14px}.viz-grid{display:grid;gap:14px;grid-template-columns:1fr 1fr}.viz-box{background:var(--card);border:1px solid var(--border);border-radius:12px;min-height:130px;display:flex;flex-direction:column}.viz-box-title{padding:9px 14px;font-size:.7rem;letter-spacing:1.2px;color:var(--text-dim);text-transform:uppercase;border-bottom:1px solid var(--border)}.viz-box-body{flex:1;padding:10px 12px;display:flex;flex-direction:column;gap:6px}.viz-box.stack .viz-box-body{justify-content:flex-end}.viz-item{padding:7px 11px;border-radius:8px;font-family:var(--mono);font-size:.8rem;animation:vizPop .3s ease both;border:1px solid transparent}@keyframes vizPop{0%{opacity:0;transform:translateY(8px) scale(.96)}to{opacity:1;transform:translateY(0) scale(1)}}.viz-box.stack .viz-item{background:#facc151f;border-color:#facc154d;color:var(--primary)}.viz-box.webapi .viz-item{background:#a78bfa1f;border-color:#a78bfa4d;color:#a78bfa}.viz-box.micro .viz-item{background:#34d3991f;border-color:#34d3994d;color:var(--green)}.viz-box.macro .viz-item{background:#38bdf81f;border-color:#38bdf84d;color:var(--accent)}.viz-empty{color:var(--text-dim);font-size:.75rem;font-style:italic}.viz-note{background:linear-gradient(160deg,var(--card),#10182b);border:1px solid var(--border);border-left:3px solid var(--primary);border-radius:12px;padding:14px 18px;font-size:.95rem;line-height:1.6;min-height:72px;animation:fadeUp .3s ease both}.viz-controls{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.viz-progress{margin-left:auto;color:var(--text-dim);font-family:var(--mono);font-size:.82rem}.viz-progressbar{height:6px;border-radius:100px;background:var(--bg-soft);overflow:hidden}.viz-progressfill{height:100%;border-radius:100px;background:linear-gradient(90deg,var(--primary),var(--accent));transition:width .3s ease}.viz-hint{color:var(--text-dim);font-size:.78rem}.viz-custom-chip{border-style:dashed}.viz-editor{padding:12px;display:flex;flex-direction:column;gap:10px}.viz-textarea{width:100%;resize:vertical;min-height:240px;background:transparent;border:1px solid var(--border);border-radius:10px;color:#a5d6ff;font-family:var(--mono);font-size:.86rem;line-height:1.7;padding:12px}.viz-textarea:focus{outline:none;border-color:var(--primary)}.viz-error{background:#f871711a;border:1px solid rgba(248,113,113,.3);color:var(--red);border-radius:8px;padding:10px 14px;font-size:.85rem}.viz-editor-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.viz-supported{color:var(--text-dim);font-size:.72rem;font-family:var(--mono)}@media (max-width: 900px){.viz-layout{grid-template-columns:1fr}.viz-grid{grid-template-columns:1fr 1fr}}.apidocs-page{max-width:900px}.api-base{display:flex;align-items:center;gap:12px;flex-wrap:wrap;background:var(--card);border:1px solid var(--border);border-radius:12px;padding:14px 18px;margin-bottom:14px}.api-base-label{font-size:.68rem;letter-spacing:1.4px;color:var(--text-dim)}.api-base code{flex:1;min-width:220px;font-family:var(--mono);font-size:.88rem;color:var(--primary);overflow-wrap:anywhere}.api-tryout{background:#0d1322;border:1px solid var(--border);border-left:3px solid var(--green);border-radius:10px;padding:14px 18px;margin-bottom:20px;font-family:var(--mono);font-size:.82rem;color:var(--green);white-space:pre-wrap;animation:fadeUp .3s ease both}.api-tryout-label{color:var(--text-dim)}.api-h2{font-size:1.3rem;margin:34px 0 14px}.api-section{margin-bottom:28px}.api-section h3{font-size:1.05rem;margin-bottom:4px}.api-section-desc{color:var(--text-dim);font-size:.9rem;margin-bottom:10px}.api-endpoints{display:flex;flex-direction:column;gap:6px}.api-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap;background:var(--card);border:1px solid var(--border);border-radius:10px;padding:10px 14px}.api-method{font-family:var(--mono);font-size:.7rem;font-weight:700;padding:3px 10px;border-radius:6px;min-width:58px;text-align:center}.api-method.get{background:#34d3991f;color:var(--green)}.api-method.post{background:#38bdf81f;color:var(--accent)}.api-method.put{background:#facc151f;color:var(--primary)}.api-method.delete{background:#f871711f;color:var(--red)}.api-path{font-family:var(--mono);font-size:.84rem;color:var(--text)}a.api-path:hover{color:var(--accent);text-decoration:underline}.api-desc{color:var(--text-dim);font-size:.82rem;margin-left:auto}.api-tier{font-size:.62rem;font-weight:700;letter-spacing:.8px;padding:3px 10px;border-radius:100px;vertical-align:middle}.api-tier.free{color:var(--green);background:#34d3991f;border:1px solid rgba(52,211,153,.3)}.api-tier.locked{color:var(--primary);background:#facc151a;border:1px solid rgba(250,204,21,.3)}.api-login-hint{color:var(--text-dim);font-size:.82rem;margin-bottom:10px}.api-row{text-align:left;font-family:inherit;transition:border-color .13s}.api-row:hover{border-color:var(--accent)}.api-row.open{border-color:var(--accent);border-bottom-left-radius:0;border-bottom-right-radius:0}.api-expand{color:var(--accent);font-size:.72rem;font-weight:700;flex-shrink:0}.api-json{background:#0d1322;border:1px solid var(--accent);border-top:none;border-radius:0 0 10px 10px;padding:14px 16px;margin:0 0 6px;font-family:var(--mono);font-size:.78rem;color:#a5d6ff;white-space:pre-wrap;word-break:break-word;max-height:340px;overflow-y:auto;animation:fadeUp .25s ease both}.api-json.error{color:var(--red)}.api-json-hint{color:var(--primary)}.api-copy{background:transparent;border:1px solid var(--border);border-radius:8px;color:var(--text-dim);font-size:.78rem;padding:4px 10px;cursor:pointer;flex-shrink:0;font-family:inherit;transition:border-color .13s,color .13s}.api-copy:hover{border-color:var(--accent);color:var(--accent)}.api-path{overflow-wrap:anywhere;word-break:break-all;min-width:0;flex:1 1 260px}.api-token-box{background:var(--card);border:1px solid rgba(250,204,21,.35);border-left:3px solid var(--primary);border-radius:12px;padding:16px 20px;margin:18px 0 4px}.api-token-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:10px;font-weight:600;font-size:.92rem}.api-token-value{display:block;font-family:var(--mono);font-size:.78rem;color:var(--primary);background:#facc1512;padding:8px 12px;border-radius:8px;word-break:break-all;margin-bottom:10px}.api-token-box p{color:var(--text-dim);font-size:.84rem;line-height:1.6;margin:0}.api-token-box p code{font-family:var(--mono);font-size:.82em;color:var(--primary);background:#facc1514;padding:1px 6px;border-radius:5px}.api-example-wrap{position:relative}.api-example-copy{position:absolute;top:10px;right:10px;z-index:2;font-size:.75rem;padding:5px 12px}.api-notes{background:var(--card);border:1px solid var(--border);border-left:3px solid var(--primary);border-radius:12px;padding:20px 24px;margin-top:34px}.api-notes h3{margin-bottom:10px;font-size:1rem}.api-notes ul{padding-left:20px;display:flex;flex-direction:column;gap:8px}.api-notes li{color:var(--text-dim);font-size:.9rem;line-height:1.6}.api-notes code{font-family:var(--mono);font-size:.82em;color:var(--primary);background:#facc1514;padding:1px 6px;border-radius:5px}.lock-badge{font-size:.9rem}.free-badge{font-size:.65rem;font-weight:700;letter-spacing:.8px;color:var(--green);background:#34d39924;border:1px solid rgba(52,211,153,.35);padding:2px 8px;border-radius:100px}.concept-card.locked{opacity:.75}.concept-card.locked:hover{border-color:var(--primary);opacity:1}.lock-screen{position:relative;max-width:560px;margin:30px auto;background:linear-gradient(165deg,var(--card),#10182b);border:1px solid var(--border);border-radius:20px;padding:48px 40px;text-align:center;overflow:hidden;display:flex;flex-direction:column;align-items:center;gap:14px}.lock-glow{position:absolute;inset:-60px -60px auto;height:200px;pointer-events:none;background:radial-gradient(ellipse at top,rgba(250,204,21,.18),transparent 70%)}.lock-icon{font-size:3.4rem;filter:drop-shadow(0 0 18px rgba(250,204,21,.5))}.lock-screen h1{font-size:1.7rem;text-transform:none}.lock-msg{color:var(--text-dim);max-width:400px}.lock-preview{width:100%;max-width:420px;margin:8px 0;background:#0d1322;border:1px solid var(--border);border-radius:12px;padding:18px;display:flex;flex-direction:column;gap:10px;position:relative}.lock-preview:after{content:"🔒 login to read";position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;color:var(--text-dim);font-size:.85rem;background:#0b0f1a8c;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);border-radius:12px}.lock-line{height:10px;border-radius:100px;background:linear-gradient(90deg,var(--border),#2c3a58)}.lock-actions{display:flex;gap:12px;flex-wrap:wrap;justify-content:center}.lock-hint{color:var(--text-dim);font-size:.85rem}.auth-split{display:grid;grid-template-columns:1fr 1fr;min-height:calc(100vh - 61px)}.auth-brand{position:relative;overflow:hidden;background:linear-gradient(160deg,#10182b,#0b0f1a 60%);border-right:1px solid var(--border);display:flex;align-items:center;justify-content:center;padding:48px}.auth-brand-inner{position:relative;z-index:1;max-width:400px}.auth-logo{font-size:1.5rem;font-weight:700;margin-bottom:28px;display:flex;align-items:center;gap:11px}.auth-brand h2{font-size:2.1rem;line-height:1.2;margin-bottom:30px}.auth-perks{list-style:none;display:flex;flex-direction:column;gap:14px}.auth-perks li{display:flex;align-items:center;gap:12px;color:var(--text-dim);font-size:1rem}.auth-perks li span{font-size:1.25rem}.auth-quote{margin-top:34px;padding:14px 18px;background:#0d1322;border:1px solid var(--border);border-radius:10px;display:inline-block}.auth-quote code{font-family:var(--mono);color:var(--primary);font-size:.95rem}.auth-brand-orb{position:absolute;width:460px;height:460px;border-radius:50%;background:radial-gradient(circle,rgba(250,204,21,.14),transparent 65%);bottom:-180px;right:-140px;animation:float 12s ease-in-out infinite}.auth-form-side{display:flex;align-items:center;justify-content:center;padding:48px 24px}.auth-card.fancy{border:1px solid transparent;background:linear-gradient(var(--card),var(--card)) padding-box,linear-gradient(150deg,rgba(250,204,21,.55),rgba(56,189,248,.4),transparent 70%) border-box;box-shadow:0 24px 70px #00000073;animation:fadeUp .5s ease both}.input-wrap{position:relative;display:flex;align-items:center}.input-wrap input{width:100%;padding-left:42px!important}.input-icon{position:absolute;left:13px;font-size:.95rem;pointer-events:none;opacity:.8}.input-eye{position:absolute;right:10px;background:none;border:none;font-size:.95rem;opacity:.7}.input-eye:hover{opacity:1}.btn-block{width:100%;padding:13px;font-size:1rem}.pass-strength{display:flex;align-items:center;gap:10px;margin-top:8px}.pass-strength .pass-bar{height:5px;border-radius:100px;flex:1;background:var(--bg-soft);position:relative;overflow:hidden}.pass-strength .pass-bar:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;border-radius:100px;transition:width .25s}.pass-strength.weak .pass-bar:after{width:30%;background:var(--red)}.pass-strength.okay .pass-bar:after{width:65%;background:var(--primary)}.pass-strength.strong .pass-bar:after{width:100%;background:var(--green)}.pass-strength span{font-size:.75rem;color:var(--text-dim);white-space:nowrap}@media (max-width: 860px){.auth-split{grid-template-columns:1fr}.auth-brand{display:none}}.gamify-strip{display:grid;grid-template-columns:1fr 1.2fr 1.4fr;gap:14px;margin:20px 0 24px}.gamify-strip>div{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:16px 18px}.gamify-streak{display:flex;align-items:center;gap:14px}.gamify-streak.alive{border-color:#facc1573}.gamify-flame{font-size:2rem;filter:grayscale(1) opacity(.5)}.gamify-streak.alive .gamify-flame{filter:none;animation:pulse 1.6s ease-in-out infinite}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.15)}}.gamify-streak strong{display:block;font-size:1.2rem}.gamify-streak span{display:block;color:var(--text-dim);font-size:.78rem;line-height:1.45}.gamify-best{color:var(--primary)!important}.gamify-level-top{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:8px}.gamify-level-top span{color:var(--text-dim);font-size:.82rem}.gamify-next{display:block;color:var(--text-dim);font-size:.74rem;margin-top:6px}.gamify-badges strong{display:block;margin-bottom:8px;font-size:.9rem}.badge-row{display:flex;flex-wrap:wrap;gap:6px}.badge-chip{font-size:1.15rem;padding:5px 8px;border-radius:10px;border:1px solid var(--border);cursor:default}.badge-chip.earned{background:#facc151a;border-color:#facc1566}.badge-chip.locked{filter:grayscale(1) opacity(.35)}@media (max-width: 860px){.gamify-strip{grid-template-columns:1fr}}.sp-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:200;background:#04081299;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);display:flex;justify-content:center;padding:12vh 16px 0;animation:fadeUp .14s ease both}.sp-panel{width:100%;max-width:620px;height:fit-content;max-height:68vh;background:var(--card, #101828);border:1px solid var(--border);border-radius:16px;overflow:hidden;display:flex;flex-direction:column;box-shadow:0 30px 70px #00000080}:root[data-theme=light] .sp-panel{background:#fff}.sp-input-row{display:flex;align-items:center;gap:10px;padding:14px 16px;border-bottom:1px solid var(--border)}.sp-input-row input{flex:1;background:transparent;border:none;outline:none;color:var(--text);font-size:1rem;font-family:inherit}.sp-esc{font-family:var(--mono);font-size:.62rem;color:var(--text-dim);border:1px solid var(--border);border-radius:4px;padding:2px 6px}.sp-list{overflow-y:auto;padding:8px}.sp-empty{color:var(--text-dim);text-align:center;padding:24px 0;font-size:.9rem}.sp-row{display:flex;align-items:center;gap:12px;width:100%;background:transparent;border:none;border-radius:10px;padding:10px 12px;cursor:pointer;text-align:left;font-family:inherit}.sp-row.active{background:#38bdf81a}.sp-row-icon{font-size:1.1rem}.sp-row-body{flex:1;min-width:0;display:flex;flex-direction:column}.sp-row-title{color:var(--text);font-size:.92rem;font-weight:600}.sp-row-sub{color:var(--text-dim);font-size:.76rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sp-row-type{font-size:.62rem;font-weight:700;letter-spacing:.6px;text-transform:uppercase;color:var(--accent);background:#38bdf81a;border-radius:100px;padding:3px 9px;flex-shrink:0}.sp-foot{display:flex;gap:18px;padding:10px 16px;border-top:1px solid var(--border);color:var(--text-dim);font-size:.72rem}.sp-foot kbd{font-family:var(--mono);font-size:.62rem;border:1px solid var(--border);border-radius:4px;padding:1px 5px;margin-right:3px}.interview-page{max-width:860px}.iv-h2{font-size:1.1rem;margin:26px 0 12px}.iv-topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.iv-topic{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:18px 16px;cursor:pointer;text-align:left;font-family:inherit;display:flex;flex-direction:column;gap:6px;transition:border-color .13s}.iv-topic:hover{border-color:var(--accent)}.iv-topic.selected{border-color:var(--accent);background:#38bdf812}.iv-topic-icon{font-size:1.5rem}.iv-topic strong{color:var(--text);font-size:.98rem}.iv-topic-desc{color:var(--text-dim);font-size:.78rem;line-height:1.45}.iv-level-row{display:flex;gap:10px;flex-wrap:wrap}.iv-level{background:var(--card);border:1px solid var(--border);border-radius:100px;padding:9px 20px;cursor:pointer;font-family:inherit;color:var(--text);transition:border-color .13s}.iv-level span{color:var(--text-dim);font-size:.78rem;margin-left:6px}.iv-level:hover{border-color:var(--accent)}.iv-level.selected{border-color:var(--accent);background:#38bdf812}.iv-start{margin-top:26px;font-size:1rem;padding:12px 28px}.iv-note{color:var(--text-dim);font-size:.82rem;margin-top:12px}.interview-error{background:#f8717114;border:1px solid rgba(248,113,113,.35);border-radius:10px;padding:12px 16px;margin:14px 0;color:var(--red);display:flex;align-items:center;gap:14px;flex-wrap:wrap}.iv-live-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.iv-progress{color:var(--text-dim);font-size:.88rem;font-weight:600}.iv-timer{font-family:var(--mono);font-size:1.05rem;color:var(--green);font-weight:700}.iv-timer.danger{color:var(--red);animation:pulse 1s ease-in-out infinite}.iv-progress-bar{height:5px;background:var(--border);border-radius:100px;margin-bottom:22px}.iv-progress-fill{height:100%;background:var(--accent);border-radius:100px;transition:width .4s}.iv-question-card{background:var(--card);border:1px solid var(--border);border-left:3px solid var(--accent);border-radius:14px;padding:20px 22px;margin-bottom:16px}.iv-interviewer{color:var(--accent);font-size:.76rem;font-weight:700;letter-spacing:.6px}.iv-question{font-size:1.08rem;line-height:1.6;margin-top:8px}.iv-answer{width:100%;min-height:170px;resize:vertical;background:var(--card);border:1px solid var(--border);border-radius:14px;padding:16px 18px;color:var(--text);font-family:inherit;font-size:.95rem;line-height:1.6;outline:none}.iv-answer:focus{border-color:var(--accent)}.iv-actions{display:flex;align-items:center;gap:16px;margin-top:16px;flex-wrap:wrap}.iv-skip-hint{color:var(--text-dim);font-size:.8rem}.iv-center{text-align:center;padding-top:90px}.iv-eval-spinner{font-size:3rem;animation:pulse 1.4s ease-in-out infinite}.iv-verdict{display:flex;align-items:center;gap:24px;background:var(--card);border:1px solid var(--border);border-radius:16px;padding:24px;margin:18px 0 8px;flex-wrap:wrap}.iv-verdict.good{border-color:#34d39973}.iv-verdict.mid{border-color:#facc1573}.iv-verdict.bad{border-color:#f8717173}.iv-score-ring{width:96px;height:96px;border-radius:50%;flex-shrink:0;background:conic-gradient(var(--accent) calc(var(--pct) * 1%),var(--border) 0);display:flex;align-items:center;justify-content:center}.iv-score-ring span{width:76px;height:76px;border-radius:50%;background:var(--card);display:flex;align-items:center;justify-content:center;font-size:1.3rem;font-weight:700}.iv-score-ring small{font-size:.72rem;color:var(--text-dim);font-weight:500}.iv-verdict-body{flex:1;min-width:220px}.iv-verdict-body strong{font-size:1.05rem;letter-spacing:.5px}.iv-verdict-body p{color:var(--text-dim);margin:6px 0 8px;line-height:1.55}.iv-xp{color:var(--green);font-weight:700;font-size:.88rem;margin-right:14px}.iv-new-badges{color:var(--primary);font-size:.85rem}.iv-feedback-card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:18px 20px;margin-bottom:12px}.iv-feedback-head{display:flex;justify-content:space-between;gap:14px;align-items:flex-start}.iv-feedback-head strong{font-size:.95rem;line-height:1.5}.iv-qscore{font-family:var(--mono);font-weight:700;flex-shrink:0;border-radius:100px;padding:3px 12px;font-size:.82rem}.iv-qscore.good{color:var(--green);background:#34d3991f}.iv-qscore.mid{color:var(--primary);background:#facc151f}.iv-qscore.bad{color:var(--red);background:#f871711f}.iv-your-answer{color:var(--text-dim);font-size:.88rem;margin:10px 0 6px;line-height:1.55}.iv-your-answer span{color:var(--text);font-weight:600}.iv-feedback{font-size:.9rem;line-height:1.6;margin-bottom:8px}.iv-model-answer summary{cursor:pointer;color:var(--accent);font-size:.85rem;font-weight:600}.iv-model-answer p{color:var(--text-dim);font-size:.88rem;line-height:1.6;margin-top:8px;padding:12px 14px;border-left:2px solid var(--green);background:#34d3990d;border-radius:0 8px 8px 0}@media (max-width: 720px){.iv-topic-grid{grid-template-columns:1fr}}.nav-drop{position:relative}.nav-drop-btn{background:transparent;border:none;cursor:pointer;font-family:inherit;color:var(--text-dim);font-weight:500;font-size:1rem;padding:8px 12px;border-radius:8px;line-height:1.2;display:flex;align-items:center;gap:6px}.nav-drop:hover .nav-drop-btn,.nav-drop.active .nav-drop-btn{color:var(--text);background:#38bdf812}.nav-caret{font-size:.58rem;opacity:.7;transition:transform .15s;position:relative;top:1px}.nav-drop:hover .nav-caret{transform:rotate(180deg)}.nav-drop-menu{visibility:hidden;opacity:0;transform:translateY(6px);transition:opacity .14s ease,transform .14s ease,visibility .14s;position:absolute;top:calc(100% + 4px);left:0;z-index:80;min-width:205px;padding:8px;background:var(--card, #101828);border:1px solid var(--border);border-radius:12px;box-shadow:0 18px 40px #0006;display:flex;flex-direction:column;gap:2px}:root[data-theme=light] .nav-drop-menu{background:#fff}.nav-drop:hover .nav-drop-menu,.nav-drop:focus-within .nav-drop-menu{visibility:visible;opacity:1;transform:translateY(0)}.nav-drop-menu:before{content:"";position:absolute;top:-8px;left:0;right:0;height:8px}.nav-drop-menu a{color:var(--text-dim);font-weight:500;font-size:.92rem;padding:9px 12px;border-radius:8px;white-space:nowrap}.nav-drop-menu a:hover{color:var(--text);background:#38bdf814}.nav-drop-menu a.active{color:var(--text);background:#38bdf81a}.nav-mobile-group{font-size:.66rem;font-weight:700;letter-spacing:1.2px;text-transform:uppercase;color:var(--text-dim);margin:10px 8px 2px}.nav-search-btn{display:flex;align-items:center;gap:6px;background:transparent;border:1px solid var(--border);border-radius:8px;color:var(--text-dim);font-size:.82rem;padding:6px 10px;cursor:pointer;font-family:inherit;transition:border-color .13s,color .13s}.nav-search-btn:hover{border-color:var(--accent);color:var(--text)}.nav-search-btn kbd{font-family:var(--mono);font-size:.62rem;color:var(--text-dim);border:1px solid var(--border);border-radius:4px;padding:1px 5px}.nav-burger{display:none;background:transparent;border:1px solid var(--border);border-radius:8px;color:var(--text);font-size:1.1rem;padding:4px 11px;cursor:pointer;line-height:1.4}.nav-mobile{display:none}@media (max-width: 920px){.nav-links{display:none}.nav-burger{display:block}.nav-user,.nav-logout,.nav-login,.nav-search-btn kbd{display:none}.navbar{padding:12px 16px;position:relative;flex-wrap:wrap}.hero{padding-top:60px}.nav-mobile{display:flex;flex-direction:column;gap:4px;position:absolute;top:100%;left:0;right:0;z-index:60;background:var(--bg, #0b1020);border-bottom:1px solid var(--border);padding:10px 16px 16px;box-shadow:0 18px 30px #00000059;animation:fadeUp .18s ease both}:root[data-theme=light] .nav-mobile{background:#fff}.nav-mobile a{color:var(--text-dim);font-weight:500;padding:10px 8px;border-radius:8px}.nav-mobile a.active{color:var(--text);background:#38bdf814}.nav-mobile a:hover{color:var(--text)}.nav-mobile .btn{margin-top:8px;text-align:center}}@media (max-width: 480px){.nav-register{display:none}}