@import"https://fonts.googleapis.com/css2?family=Spectral:ital,wght@0,300;0,400;0,500;0,600;1,400;1,500&family=IBM+Plex+Mono:wght@400;500;600&display=swap";:root{--bg-0: #080c12;--bg-1: #0d141f;--bg-2: #131c2a;--bg-3: #1a2536;--bg-4: #223149;--line: rgba(255, 255, 255, 0.08);--line-2: rgba(231, 178, 78, 0.22);--gold: #e3ac4a;--gold-bright: #f0d285;--gold-deep: #c58a1e;--cream: #f2e6c8;--star: #fbf1d4;--ink: #ece7db;--ink-2: #aeb6c6;--ink-3: #7e8696;--ink-4: #55607a;--best: #5bcb8b;--good: #8fb96b;--book: #9a8fe0;--inacc: #e0a23b;--mistake: #e8804b;--blunder: #e0533b;--serif: 'Spectral', Georgia, serif;--mono: 'IBM Plex Mono', monospace;--nav-h: 60px;--radius-sm: 6px;--radius-md: 12px;--radius-lg: 20px}*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg-1);color:var(--ink);font-family:var(--serif);min-height:100vh;overflow-x:hidden}a{color:inherit;text-decoration:none}ul{list-style:none}::selection{background:rgba(227,172,74,.28)}.topnav{position:sticky;top:0;z-index:100;height:var(--nav-h);display:flex;align-items:center;gap:32px;padding:0 40px;background:rgba(13,20,31,.85);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}.brand .brand-icon{width:28px;height:28px;color:var(--gold)}.brand .brand-name{font-family:var(--serif);font-weight:600;font-size:1.15rem;letter-spacing:.02em;color:var(--ink)}.brand .brand-a{color:var(--gold)}.nav-links{display:flex;gap:28px;margin-left:auto}.nav-links .nav-link{font-size:.875rem;color:var(--ink-3);transition:color .2s}.nav-links .nav-link:hover{color:var(--ink)}.btn-cta{flex-shrink:0;padding:8px 20px;background:var(--gold);color:var(--bg-0);font-family:var(--mono);font-size:.8rem;font-weight:600;border-radius:var(--radius-sm);transition:background .2s}.btn-cta:hover{background:var(--gold-bright)}.hero{min-height:calc(100vh - var(--nav-h));display:flex;align-items:center;padding:80px 40px;background:radial-gradient(ellipse 60% 50% at 70% 60%, rgba(227, 172, 74, 0.06) 0%, transparent 70%),radial-gradient(ellipse 40% 40% at 20% 30%, rgba(90, 155, 224, 0.05) 0%, transparent 70%),var(--bg-1)}.hero-inner{max-width:1100px;margin:0 auto;width:100%;display:flex;align-items:center;gap:80px}.hero-text{flex:1}.hero-text .hero-badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;background:rgba(227,172,74,.12);border:1px solid var(--line-2);border-radius:20px;font-family:var(--mono);font-size:.75rem;color:var(--gold);letter-spacing:.05em;margin-bottom:28px}.hero-text h1{font-size:clamp(2.4rem,5vw,3.6rem);font-weight:600;line-height:1.1;letter-spacing:-0.02em;color:var(--star);margin-bottom:24px}.hero-text .hero-sub{font-size:1.05rem;color:var(--ink-2);line-height:1.65;max-width:460px;margin-bottom:40px}.hero-text .hero-sub em{color:var(--gold);font-style:italic}.hero-actions{display:flex;gap:16px;flex-wrap:wrap}.btn-primary{padding:14px 28px;background:var(--gold);color:var(--bg-0);font-family:var(--mono);font-size:.85rem;font-weight:600;border-radius:var(--radius-sm);transition:background .2s,transform .15s}.btn-primary:hover{background:var(--gold-bright);transform:translateY(-1px)}.btn-ghost{padding:14px 28px;border:1px solid var(--line);color:var(--ink-2);font-family:var(--serif);font-size:.9rem;border-radius:var(--radius-sm);transition:border-color .2s,color .2s}.btn-ghost:hover{border-color:hsla(0,0%,100%,.2);color:var(--ink)}.hero-visual{flex-shrink:0;width:340px;position:relative}.board-mockup{width:100%;aspect-ratio:1;background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius-md);display:grid;grid-template-columns:18px 1fr;gap:12px;padding:20px;position:relative;box-shadow:0 24px 80px rgba(0,0,0,.5),0 0 0 1px var(--line)}.board-mockup .eval-bar{background:var(--bg-3);border-radius:4px;overflow:hidden;display:flex;flex-direction:column;justify-content:flex-end}.board-mockup .eval-bar .eval-fill{background:linear-gradient(to top, var(--best), rgba(91, 203, 139, 0.4));border-radius:4px;transition:height .3s}.board-mockup .board-squares{display:grid;grid-template-columns:repeat(8, 1fr);grid-template-rows:repeat(8, 1fr);border-radius:4px;overflow:hidden}.board-mockup .board-squares::after{content:"";grid-column:1/-1;grid-row:1/-1;background:repeating-conic-gradient(var(--bg-3) 0% 25%, var(--bg-4) 0% 50%) 0 0/12.5% 12.5%}.board-mockup .annotation-chip{position:absolute;font-family:var(--mono);font-size:.7rem;font-weight:600;padding:4px 10px;border-radius:20px}.board-mockup .annotation-chip.chip-best{background:rgba(91,203,139,.15);border:1px solid rgba(91,203,139,.3);color:var(--best);bottom:80px;right:-20px}.board-mockup .annotation-chip.chip-blunder{background:rgba(224,83,59,.15);border:1px solid rgba(224,83,59,.3);color:var(--blunder);top:60px;right:-30px}.section-inner{max-width:1100px;margin:0 auto;width:100%}.section-title{font-size:clamp(1.6rem,3vw,2.2rem);font-weight:600;text-align:center;color:var(--star);margin-bottom:12px}.section-sub{text-align:center;color:var(--ink-3);font-size:1rem;margin-bottom:56px}.features{padding:100px 40px;border-top:1px solid var(--line)}.features-grid{display:grid;grid-template-columns:repeat(auto-fit, minmax(280px, 1fr));gap:24px;margin-top:56px}.feature-card{padding:32px;background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius-md);transition:border-color .2s}.feature-card:hover{border-color:hsla(0,0%,100%,.15)}.feature-card--highlight{border-color:var(--line-2);background:linear-gradient(135deg, rgba(227, 172, 74, 0.06) 0%, var(--bg-2) 60%)}.feature-card--highlight:hover{border-color:rgba(227,172,74,.4)}.feature-card .feature-icon{font-size:1.8rem;margin-bottom:20px;display:block}.feature-card .feature-icon.icon-stockfish{color:var(--ink-2)}.feature-card .feature-icon.icon-coach{color:var(--gold)}.feature-card .feature-icon.icon-progress{color:var(--best)}.feature-card h3{font-size:1.05rem;font-weight:600;color:var(--ink);margin-bottom:12px}.feature-card p{font-size:.9rem;color:var(--ink-3);line-height:1.65}.pricing{padding:100px 40px;border-top:1px solid var(--line);background:var(--bg-0)}.pricing-grid{display:grid;grid-template-columns:repeat(auto-fit, minmax(260px, 1fr));gap:24px;align-items:start}.pricing-card{padding:32px;background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius-md);position:relative}.pricing-card--featured{border-color:var(--line-2);background:linear-gradient(160deg, rgba(227, 172, 74, 0.08) 0%, var(--bg-2) 50%);transform:translateY(-8px);box-shadow:0 16px 48px rgba(0,0,0,.4)}.pricing-card .plan-badge{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--gold);color:var(--bg-0);font-family:var(--mono);font-size:.7rem;font-weight:600;padding:3px 12px;border-radius:20px}.pricing-card .plan-name{font-family:var(--mono);font-size:.75rem;font-weight:600;color:var(--ink-3);text-transform:uppercase;letter-spacing:.1em;margin-bottom:16px}.pricing-card .plan-price{margin-bottom:28px}.pricing-card .plan-price .price-amount{font-size:2.4rem;font-weight:600;color:var(--star)}.pricing-card .plan-price .price-period{font-size:.875rem;color:var(--ink-3);margin-left:4px}.pricing-card .plan-features{display:flex;flex-direction:column;gap:10px;margin-bottom:32px}.pricing-card .plan-features li{font-size:.875rem;color:var(--ink-2);padding-left:20px;position:relative}.pricing-card .plan-features li::before{content:"✓";position:absolute;left:0;color:var(--best);font-size:.8rem}.pricing-card .plan-features li.plan-feature--muted{color:var(--ink-4)}.pricing-card .plan-features li.plan-feature--muted::before{content:"–";color:var(--ink-4)}.btn-plan{display:block;width:100%;text-align:center;padding:12px;border:1px solid var(--line);color:var(--ink-2);font-family:var(--mono);font-size:.8rem;font-weight:500;border-radius:var(--radius-sm);transition:border-color .2s,color .2s}.btn-plan:hover{border-color:hsla(0,0%,100%,.2);color:var(--ink)}.btn-plan--primary{background:var(--gold);border-color:var(--gold);color:var(--bg-0);font-weight:600}.btn-plan--primary:hover{background:var(--gold-bright);border-color:var(--gold-bright);color:var(--bg-0)}.footer{padding:60px 40px 40px;border-top:1px solid var(--line);background:var(--bg-0)}.footer-inner{max-width:1100px;margin:0 auto;display:flex;justify-content:space-between;align-items:flex-start;gap:40px;margin-bottom:40px}.footer-inner .footer-tagline{font-size:.825rem;color:var(--ink-4);margin-top:8px}.footer-inner .footer-links{display:flex;gap:28px}.footer-inner .footer-links a{font-size:.875rem;color:var(--ink-3);transition:color .2s}.footer-inner .footer-links a:hover{color:var(--ink)}.footer-copy{max-width:1100px;margin:0 auto;font-size:.75rem;color:var(--ink-4);font-family:var(--mono)}@media(max-width: 900px){.topnav{padding:0 24px;gap:16px}.hero{padding:60px 24px}.hero .hero-inner{flex-direction:column;gap:48px}.hero .hero-visual{width:100%;max-width:340px;margin:0 auto}.features,.pricing{padding:72px 24px}.footer{padding:48px 24px 32px}.footer-inner{flex-direction:column;gap:24px}.pricing-card--featured{transform:none}}@media(max-width: 600px){.nav-links{display:none}.hero h1{font-size:2rem}}