*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #0a0a0a;--bg-alt: #111111;--bg-card: #161616;--bg-card-hover: #1c1c1c;--border: #252525;--border-light: #2e2e2e;--accent: #f59e0b;--accent-dim: #d97706;--accent-glow: rgba(245, 158, 11, .15);--text: #e8e8e8;--text-muted: #888888;--text-faint: #555555;--radius: 10px;--radius-lg: 16px;--font: "Inter", system-ui, -apple-system, sans-serif;--mono: "JetBrains Mono", "Fira Code", monospace;--nav-h: 64px;--max-w: 1100px;--transition: .2s ease}html{scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 24px)}body{background-color:var(--bg);color:var(--text);font-family:var(--font);font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{color:var(--accent);text-decoration:none;transition:color var(--transition)}a:hover{color:#fbbf24}strong{color:#f0f0f0;font-weight:600}em{color:var(--accent);font-style:normal;font-weight:500}.navbar{position:fixed;top:0;left:0;right:0;z-index:100;height:var(--nav-h);transition:background .3s ease,border-bottom .3s ease,box-shadow .3s ease}.navbar-scrolled{background:#0a0a0aeb;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);box-shadow:0 4px 24px #0006}.navbar-inner{max-width:var(--max-w);margin:0 auto;padding:0 24px;height:100%;display:flex;align-items:center;justify-content:space-between}.navbar-logo{font-family:var(--mono);font-size:1.25rem;font-weight:500;color:var(--accent);letter-spacing:-.02em}.navbar-links{display:flex;gap:32px;align-items:center}.navbar-links a{color:var(--text-muted);font-size:.875rem;font-weight:500;letter-spacing:.02em;transition:color var(--transition)}.navbar-links a:hover{color:var(--text)}.navbar-hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:4px}.navbar-hamburger span{display:block;width:22px;height:2px;background:var(--text-muted);border-radius:2px;transition:background var(--transition)}.navbar-hamburger:hover span{background:var(--text)}.hero{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;overflow:hidden;padding:calc(var(--nav-h) + 40px) 24px 80px}.hero-bg-grid{position:absolute;top:0;right:0;bottom:0;left:0;background-image:linear-gradient(rgba(245,158,11,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(245,158,11,.04) 1px,transparent 1px);background-size:48px 48px;-webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 50%,black 40%,transparent 100%);mask-image:radial-gradient(ellipse 80% 60% at 50% 50%,black 40%,transparent 100%)}.hero:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:radial-gradient(ellipse 60% 50% at 50% 40%,rgba(245,158,11,.06) 0%,transparent 70%);pointer-events:none}.hero-content{position:relative;z-index:1;max-width:780px;text-align:center}.hero-badge{display:inline-block;font-family:var(--mono);font-size:.75rem;font-weight:500;letter-spacing:.1em;text-transform:uppercase;color:var(--accent);background:var(--accent-glow);border:1px solid rgba(245,158,11,.3);padding:6px 16px;border-radius:100px;margin-bottom:28px}.hero-title{font-size:clamp(2.5rem,7vw,5rem);font-weight:700;line-height:1.1;letter-spacing:-.03em;color:#f4f4f4;margin-bottom:24px}.hero-title .accent{color:var(--accent);display:inline-block}.hero-subtitle{font-size:clamp(1rem,2vw,1.2rem);color:var(--text-muted);line-height:1.75;max-width:640px;margin:0 auto 48px}.hero-stats{display:inline-flex;align-items:center;gap:0;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px 32px;flex-wrap:wrap;justify-content:center}.stat{display:flex;flex-direction:column;align-items:center;padding:0 28px}.stat-number{font-family:var(--mono);font-size:1.75rem;font-weight:500;color:var(--accent);line-height:1;margin-bottom:4px}.stat-label{font-size:.75rem;color:var(--text-faint);letter-spacing:.05em;text-transform:uppercase}.stat-divider{width:1px;height:40px;background:var(--border)}.section{padding:96px 24px}.section-alt{background:var(--bg-alt)}.container{max-width:var(--max-w);margin:0 auto}.section-label{font-family:var(--mono);font-size:.72rem;font-weight:500;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin-bottom:12px}.section-title{font-size:clamp(1.75rem,4vw,2.75rem);font-weight:700;letter-spacing:-.02em;color:#f0f0f0;margin-bottom:40px;line-height:1.15}.section-intro{font-size:1.05rem;color:var(--text-muted);max-width:700px;margin-bottom:64px;line-height:1.8}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}.prose p{color:var(--text-muted);margin-bottom:20px;line-height:1.85}.prose p:last-child{margin-bottom:0}.info-cards{display:flex;flex-direction:column;gap:16px}.info-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:22px 24px;transition:border-color var(--transition),background var(--transition)}.info-card:hover{border-color:#f59e0b66;background:var(--bg-card-hover)}.info-card-icon{font-size:1.4rem;margin-bottom:10px}.info-card h3{font-size:.95rem;font-weight:600;color:#e8e8e8;margin-bottom:8px}.info-card p{font-size:.875rem;color:var(--text-muted);line-height:1.7}.specs-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px;margin-bottom:56px}.spec-block{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px}.spec-block-title{font-size:1rem;font-weight:600;color:var(--accent);margin-bottom:24px;padding-bottom:16px;border-bottom:1px solid var(--border)}.spec-list{list-style:none;display:flex;flex-direction:column;gap:20px}.spec-list li{display:flex;gap:16px;align-items:flex-start;font-size:.875rem;color:var(--text-muted);line-height:1.65}.step-num{font-family:var(--mono);font-size:.7rem;font-weight:500;color:var(--accent);background:var(--accent-glow);border:1px solid rgba(245,158,11,.2);padding:3px 8px;border-radius:4px;min-width:32px;text-align:center;margin-top:1px;flex-shrink:0}.spec-table{width:100%;border-collapse:collapse;font-size:.875rem}.spec-table tr{border-bottom:1px solid var(--border)}.spec-table tr:last-child{border-bottom:none}.spec-table td{padding:11px 0;line-height:1.5}.spec-table td:first-child{color:var(--text-faint);font-size:.8rem;letter-spacing:.03em;width:42%}.spec-table td:last-child{color:var(--text);font-family:var(--mono);font-size:.8rem}.bitrate-section{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px}.bitrate-intro{font-size:.9rem;color:var(--text-muted);margin-bottom:32px;line-height:1.75}.bitrate-bars{display:flex;flex-direction:column;gap:18px}.bitrate-row{display:flex;align-items:center;gap:20px}.bitrate-label{display:flex;align-items:baseline;gap:12px;min-width:340px;flex-shrink:0}.bitrate-rate{font-family:var(--mono);font-size:.85rem;font-weight:500;min-width:70px}.bitrate-use{font-size:.8rem;color:var(--text-muted);flex:1}.bitrate-size{font-family:var(--mono);font-size:.75rem;color:var(--text-faint);min-width:90px;text-align:right}.bitrate-bar-track{flex:1;height:6px;background:var(--border);border-radius:3px;overflow:hidden}.bitrate-bar-fill{height:100%;border-radius:3px;transition:width .8s cubic-bezier(.4,0,.2,1)}.timeline{display:flex;flex-direction:column;gap:0}.timeline-item{display:grid;grid-template-columns:80px 40px 1fr;gap:0;cursor:pointer}.timeline-year-col{display:flex;align-items:flex-start;justify-content:flex-end;padding-right:20px;padding-top:18px}.timeline-year{font-family:var(--mono);font-size:.75rem;font-weight:500;color:var(--text-faint);letter-spacing:.05em;transition:color var(--transition)}.timeline-item:hover .timeline-year,.timeline-item.active .timeline-year{color:var(--accent)}.timeline-line-col{display:flex;flex-direction:column;align-items:center;position:relative}.timeline-dot{width:12px;height:12px;border-radius:50%;background:var(--border-light);border:2px solid var(--bg);margin-top:20px;flex-shrink:0;transition:background var(--transition),box-shadow var(--transition);z-index:1}.timeline-item:hover .timeline-dot,.timeline-item.active .timeline-dot{background:var(--accent);box-shadow:0 0 0 4px var(--accent-glow)}.timeline-connector{flex:1;width:1px;background:var(--border);min-height:24px}.timeline-content-col{padding:10px 0 28px 20px}.timeline-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:22px 24px;transition:border-color var(--transition),background var(--transition)}.timeline-item:hover .timeline-card,.timeline-item.active .timeline-card{border-color:#f59e0b59;background:var(--bg-card-hover)}.timeline-card-title{font-size:1rem;font-weight:600;color:#e8e8e8;margin-bottom:10px;transition:color var(--transition)}.timeline-item:hover .timeline-card-title,.timeline-item.active .timeline-card-title{color:var(--accent)}.timeline-card-body{font-size:.875rem;color:var(--text-muted);line-height:1.8}.legacy-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.legacy-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px;transition:border-color var(--transition),background var(--transition),transform var(--transition)}.legacy-card:hover{border-color:#f59e0b59;background:var(--bg-card-hover);transform:translateY(-2px)}.legacy-icon{font-size:1.75rem;margin-bottom:16px}.legacy-card h3{font-size:1rem;font-weight:600;color:#e8e8e8;margin-bottom:12px;line-height:1.3}.legacy-card p{font-size:.875rem;color:var(--text-muted);line-height:1.8}.footer{background:var(--bg-alt);border-top:1px solid var(--border);padding:48px 24px 32px}.footer-inner{max-width:var(--max-w);margin:0 auto 40px;display:flex;align-items:flex-start;justify-content:space-between;gap:32px}.footer-brand{max-width:320px}.footer-logo{font-family:var(--mono);font-size:1.5rem;font-weight:500;color:var(--accent);display:block;margin-bottom:10px}.footer-brand p{font-size:.875rem;color:var(--text-faint);line-height:1.6}.footer-links{display:flex;gap:24px;flex-wrap:wrap;align-items:center}.footer-links a{font-size:.875rem;color:var(--text-faint);transition:color var(--transition)}.footer-links a:hover{color:var(--text-muted)}.footer-bottom{max-width:var(--max-w);margin:0 auto;padding-top:24px;border-top:1px solid var(--border)}.footer-bottom p{font-size:.75rem;color:var(--text-faint);line-height:1.6}@media (max-width: 900px){.two-col{grid-template-columns:1fr;gap:40px}.specs-grid{grid-template-columns:1fr}.legacy-grid{grid-template-columns:repeat(2,1fr)}.bitrate-label{min-width:0;flex-direction:column;align-items:flex-start;gap:2px;width:180px;flex-shrink:0}.bitrate-size{display:none}}@media (max-width: 640px){.section{padding:64px 20px}.navbar-links{display:none;position:absolute;top:var(--nav-h);left:0;right:0;background:#0a0a0af7;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);flex-direction:column;gap:0;padding:8px 0}.navbar-links.open{display:flex}.navbar-links a{padding:14px 24px;width:100%;font-size:1rem;border-bottom:1px solid var(--border)}.navbar-hamburger{display:flex}.hero-stats{flex-direction:column;gap:20px;padding:24px;width:100%}.stat-divider{width:80px;height:1px}.stat{padding:0}.timeline-item{grid-template-columns:56px 32px 1fr}.legacy-grid{grid-template-columns:1fr}.footer-inner{flex-direction:column}.footer-links{gap:16px}.bitrate-row{flex-direction:column;align-items:flex-start;gap:8px}.bitrate-label{width:100%;flex-direction:row;align-items:baseline}.bitrate-bar-track{width:100%}}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--bg)}::-webkit-scrollbar-thumb{background:var(--border-light);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-faint)}::selection{background:#f59e0b40;color:var(--text)}