:root{--color-bg:#f4f8fb;--color-surface:#fff;--color-text:#0f172a;--color-text-secondary:#64748b;--color-text-muted:#94a3b8;--color-border:#e2e8f0;--color-border-strong:#cbd5e1;--color-accent:#0e90d2;--color-accent-hover:#0b7ab5;--color-accent-soft:#e8f4fb;--color-danger:#dc2626;--color-danger-soft:#fef2f2;--color-warning-soft:#fffbeb;--color-warning-border:#fde68a;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-full:9999px;--shadow-sm:0 1px 2px #0f172a0a;--space-xs:4px;--space-sm:8px;--space-md:16px;--space-lg:24px;--space-xl:32px;--container:900px;--header-height:50px;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*,:before,:after{box-sizing:border-box}html,body{min-height:100%;margin:0}body{background:var(--color-bg);color:var(--color-text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.6}a{color:var(--color-accent);text-decoration:none}a:hover{text-decoration:underline}code{background:var(--color-bg);border-radius:4px;padding:2px 6px;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;font-size:.9em}#root{min-height:100vh}.material-symbols-outlined{font-variation-settings:"FILL" 0, "wght" 400, "GRAD" 0, "opsz" 24;-webkit-user-select:none;user-select:none}.app-shell{flex-direction:column;min-height:100vh;display:flex}.app-shell--minimal{background:#000}.app-header{z-index:10;background:var(--color-accent);position:sticky;top:0}.app-header__inner{max-width:var(--container);padding:0 var(--space-md);height:var(--header-height);justify-content:space-between;align-items:center;gap:var(--space-md);margin:0 auto;display:flex}.app-brand{color:#fff;align-items:center;gap:10px;font-weight:600;text-decoration:none;display:inline-flex}.app-brand:hover{opacity:.92;text-decoration:none}.app-brand__logo{color:#fff;font-size:22px}.app-brand__name{letter-spacing:-.01em;font-size:15px}.app-nav__list{gap:4px;margin:0;padding:0;list-style:none;display:flex}.app-nav a{border-radius:var(--radius-full);color:#ffffffd9;align-items:center;padding:8px 14px;font-size:14px;font-weight:500;text-decoration:none;transition:background .15s,color .15s;display:inline-flex}.app-nav a:hover{color:#fff;background:#ffffff26;text-decoration:none}.app-nav a.is-active{color:#fff;background:#ffffff38}.app-main{width:100%;max-width:var(--container);padding:var(--space-xl) var(--space-md) var(--space-lg);flex:1;margin:0 auto}.app-main--minimal{max-width:none;margin:0;padding:0}.app-footer{max-width:var(--container);width:100%;padding:var(--space-lg) var(--space-md) var(--space-xl);text-align:center;color:var(--color-text-muted);margin:0 auto;font-size:13px}.app-footer p{margin:4px 0}.app-footer a{color:var(--color-text-secondary);font-weight:500}.page{gap:var(--space-lg);flex-direction:column;display:flex}.hero{text-align:center;padding:var(--space-sm) 0 var(--space-xs)}.hero-compact{padding-bottom:0}.hero h1{letter-spacing:-.03em;color:var(--color-accent);margin:0 0 8px;font-size:clamp(1.75rem,4vw,2rem);font-weight:800;line-height:1.15}.hero__lead{color:var(--color-text-secondary);margin:0;font-size:15px}.panel{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:var(--space-lg)}.panel__head{margin-bottom:var(--space-md);color:var(--color-text);align-items:center;gap:8px;display:flex}.panel__head h2{margin:0;font-size:16px;font-weight:600}.panel__head .material-symbols-outlined{color:var(--color-text-secondary);font-size:20px}.player-form{margin-bottom:var(--space-md);gap:10px;display:flex}.input-wrap{flex:1;position:relative}.input-wrap__icon{color:var(--color-text-muted);pointer-events:none;font-size:20px;position:absolute;top:50%;left:14px;transform:translateY(-50%)}.input-wrap input{border:1px solid var(--color-accent);border-radius:var(--radius-md);background:var(--color-surface);width:100%;height:44px;color:var(--color-text);outline:none;padding:0 14px 0 44px;font-size:15px;transition:border-color .15s,box-shadow .15s}.input-wrap input:focus{box-shadow:0 0 0 3px #0e90d226}.input-wrap input::placeholder{color:var(--color-text-muted)}.btn{border-radius:var(--radius-md);cursor:pointer;white-space:nowrap;border:none;justify-content:center;align-items:center;gap:6px;height:44px;padding:0 16px;font-size:14px;font-weight:600;transition:background .15s,opacity .15s;display:inline-flex}.btn .material-symbols-outlined{font-size:20px}.btn:disabled{opacity:.55;cursor:not-allowed}.btn-primary{background:var(--color-accent);color:#fff}.btn-primary:hover:not(:disabled){background:var(--color-accent-hover)}.player-video-wrap{border-radius:var(--radius-md);background:#000;width:100%;min-height:200px;position:relative;overflow:hidden}.player--compact .player-video-wrap{border-radius:0;min-height:100vh}.player-video{background:#000;width:100%;min-height:200px;display:block}.player--compact .player-video{object-fit:contain;min-height:100vh}.player-video__placeholder{color:#ffffff8c;pointer-events:none;flex-direction:column;justify-content:center;align-items:center;gap:8px;font-size:14px;display:flex;position:absolute;inset:0}.player-video__placeholder .material-symbols-outlined{font-size:48px}.player-hint{margin:var(--space-md) 0 0;color:var(--color-text-muted);font-size:13px}.lookup-alert{margin-top:var(--space-md);background:var(--color-danger-soft);color:var(--color-danger);border-color:#fecaca;align-items:flex-start;gap:10px;display:flex}.lookup-alert .material-symbols-outlined{flex-shrink:0;margin-top:1px;font-size:20px}.lookup-alert p{margin:0;font-size:14px;line-height:1.5}.instructions .steps{color:var(--color-text-secondary);margin:0;padding-left:1.25rem;font-size:14px}.instructions .steps li{padding:4px 0}.prose h2{margin:0 0 12px;font-size:16px;font-weight:700}.prose p{color:var(--color-text-secondary);margin:0 0 10px;font-size:14px;line-height:1.7}.code-block{margin:0 0 var(--space-md);color:#e2e8f0;border-radius:var(--radius-md);white-space:pre-wrap;word-break:break-all;background:#1e293b;padding:14px 16px;font-size:13px;line-height:1.6;overflow-x:auto}.feature-grid{grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:12px;display:grid}.feature-card{border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-bg);padding:16px}.feature-card__icon{color:var(--color-accent);margin-bottom:10px;font-size:22px}.feature-card h3{margin:0 0 6px;font-size:14px;font-weight:600}.feature-card p{color:var(--color-text-secondary);margin:0;font-size:13px}.notice{border-radius:var(--radius-sm);padding:12px 14px;font-size:13px;line-height:1.6}.notice--warning{background:var(--color-warning-soft);border:1px solid var(--color-warning-border);color:#92400e}.notice ul{margin:0;padding-left:1.1rem}.prose section+section{margin-top:var(--space-xl)}.back-link{margin-top:var(--space-xl);padding-top:var(--space-lg);border-top:1px solid var(--color-border)}.back-link a{border:1px solid var(--color-border);border-radius:var(--radius-full);color:var(--color-text-secondary);align-items:center;gap:6px;padding:10px 16px;font-size:14px;font-weight:500;text-decoration:none;transition:background .15s,color .15s;display:inline-flex}.back-link a:hover{background:var(--color-bg);color:var(--color-text);text-decoration:none}.back-link .material-symbols-outlined{font-size:18px}@media (width<=640px){.app-main{padding-top:var(--space-lg)}.player-form{flex-direction:column}.btn-primary{width:100%}.panel{padding:var(--space-md)}.player-video-wrap,.player-video{min-height:200px}}