:root{--bg: #f7f7fb;--surface: #ffffff;--text: #111827;--muted: #6b7280;--border: #e5e7eb;--accent: #0f766e;--accent-ink: #ffffff;--accent-soft: #e6f6f4;--link: #0f766e;--user-bubble: #f3f4f6;--code-bg: #0f172a;--ok: #15803d;--error: #b91c1c;--radius: 12px;--shadow: 0 1px 2px rgba(17, 24, 39, .05), 0 4px 16px rgba(17, 24, 39, .06);color-scheme:light}@media(prefers-color-scheme:dark){:root{--bg: #0b0d12;--surface: #151821;--text: #e5e7eb;--muted: #9ca3af;--border: #272b36;--accent-soft: #0b3330;--link: #5eead4;--user-bubble: #1f2330;--code-bg: #0a0f1c;--ok: #4ade80;--error: #f87171;--shadow: 0 1px 2px rgba(0, 0, 0, .4);color-scheme:dark}}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.6 Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif}a{color:var(--link)}code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.9em}:not(pre)>code{background:var(--accent-soft);padding:.08em .35em;border-radius:4px}.wrap{max-width:1280px;margin:0 auto;padding:0 16px}.muted{color:var(--muted)}[hidden]{display:none!important}.site-header{background:var(--surface);border-bottom:1px solid var(--border)}.site-header .wrap{display:flex;align-items:center;gap:24px;min-height:60px;flex-wrap:wrap}.brand{display:flex;align-items:center;gap:8px;font-weight:700;color:var(--text);text-decoration:none;font-size:18px}.site-header nav{display:flex;gap:4px 16px;flex-wrap:wrap;font-size:14px}.site-header nav a{color:var(--muted);text-decoration:none;padding:4px 0}.site-header nav a:hover,.site-header nav a[aria-current]{color:var(--text)}.site-header nav a[aria-current]{box-shadow:inset 0 -2px var(--accent)}.hero{padding-top:30px;padding-bottom:6px}.hero h1{font-size:clamp(28px,4vw,40px);line-height:1.15;margin:0 0 10px;letter-spacing:-.02em}.lead{font-size:18px;color:var(--muted);max-width:840px;margin:0 0 20px}.btn{font:inherit;font-weight:600;font-size:14px;border:1px solid var(--border);background:var(--surface);color:var(--text);padding:7px 13px;border-radius:9px;cursor:pointer}.btn:hover{border-color:var(--muted)}.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn.small{padding:5px 10px;font-size:13px;font-weight:500}.btn.wide{width:100%}.link{background:none;border:0;color:var(--link);font:inherit;cursor:pointer;text-decoration:underline;padding:0}.tool{margin:6px 0 28px}.tool.dragging .workbench{outline:3px dashed var(--accent);outline-offset:4px}.workbench{display:grid;grid-template-columns:1fr 1fr;gap:14px}.pane{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:12px;display:flex;flex-direction:column;gap:8px;min-width:0}.pane-head{display:flex;justify-content:space-between;align-items:center;gap:8px;flex-wrap:wrap}.pane-actions{display:flex;gap:12px;align-items:center;font-size:14px}textarea{font:13px/1.5 ui-monospace,SFMono-Regular,Consolas,monospace;width:100%;min-height:300px;resize:vertical;padding:10px 12px;border-radius:9px;border:1px solid var(--border);background:var(--bg);color:var(--text)}textarea:focus{outline:2px solid var(--accent);border-color:transparent}#output{background:var(--surface)}.detected-row{display:flex;justify-content:space-between;gap:8px;flex-wrap:wrap;font-size:13px}.enc{display:flex;gap:6px;align-items:center;color:var(--muted)}.opts{display:grid;grid-template-columns:1fr 1fr;gap:10px}fieldset{border:1px solid var(--border);border-radius:9px;margin:0;padding:6px 10px 8px;font-size:13px;min-width:0}legend,.legend{font-weight:700;padding:0 4px;font-size:13px}.legend{margin:8px 0 2px;padding:0}.row{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin:4px 0}input[type=number],input[type=text]{font:inherit;width:64px;padding:3px 6px;border-radius:6px;border:1px solid var(--border);background:var(--bg);color:var(--text)}input[type=text]{width:82px}.chips{display:flex;gap:6px}.chip{font:inherit;font-size:13px;font-weight:700;border:1px solid var(--border);background:none;color:var(--muted);border-radius:8px;padding:4px 12px;cursor:pointer}.chip[aria-pressed=true]{background:var(--accent-soft);color:var(--link);border-color:var(--accent)}.out-actions{display:flex;justify-content:space-between;align-items:center;gap:8px;flex-wrap:wrap;font-size:13px}.media-row{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-top:12px;font-size:13px}.media-box{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:14px;margin-top:12px}.media-box:not(:has(.sync)){grid-template-columns:minmax(0,720px)}.player video{width:100%;max-height:420px;background:#000;border-radius:10px;display:block}.sync{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:12px;display:flex;flex-direction:column;gap:6px;min-width:0}.sync p{margin:0;font-size:13px}.sync-list{margin:0;padding:0;list-style:none;max-height:260px;overflow:auto;border:1px solid var(--border);border-radius:8px;font-size:13px}.sync-list li{display:flex;gap:10px;padding:5px 8px;border-bottom:1px solid var(--border)}.sync-list li.done{color:var(--muted)}.sync-list li.next{background:var(--accent-soft);font-weight:600}.sync-time{font-family:ui-monospace,Consolas,monospace;min-width:70px}kbd{font:12px ui-monospace,Consolas,monospace;border:1px solid var(--border);border-bottom-width:2px;border-radius:4px;padding:0 4px;background:var(--bg)}.table-wrap{overflow-x:auto}table{border-collapse:collapse;width:100%;max-width:840px;font-size:15px}th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--border);vertical-align:top}@media(max-width:900px){.workbench,.opts,.media-box{grid-template-columns:1fr}textarea{min-height:200px}}.status{min-height:1.6em;font-size:14px;margin:8px 2px 0;color:var(--muted)}.status[data-kind=ok]{color:var(--ok)}.status[data-kind=error]{color:var(--error);font-weight:600}.content{padding-bottom:40px}.content h2{font-size:24px;margin:36px 0 12px;letter-spacing:-.01em}.content p,.content li{max-width:840px}.content pre{background:var(--code-bg);color:#e2e8f0;padding:14px;border-radius:10px;overflow-x:auto;max-width:840px;font-size:13px}.steps{padding-left:22px}.steps li{margin:6px 0}.checks{list-style:none;padding:0}.checks li{padding-left:26px;position:relative;margin:8px 0}.checks li:before{content:"";position:absolute;left:4px;top:.55em;width:10px;height:10px;border-radius:3px;background:var(--accent)}.faq details{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:10px 14px;margin:8px 0;max-width:840px}.faq summary{font-weight:600;cursor:pointer}.faq details div p{margin:8px 0 0}.related ul{list-style:none;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:10px}.related li{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:12px 14px;display:flex;flex-direction:column}.related li a{font-weight:600}.related li span{font-size:14px;color:var(--muted)}.site-footer{border-top:1px solid var(--border);background:var(--surface);font-size:14px;color:var(--muted);padding:18px 0}.site-footer p{margin:6px 0}@media(max-width:560px){.site-header .wrap{gap:0;padding-top:8px}.site-header nav{flex-wrap:nowrap;overflow-x:auto;width:100%;gap:16px;padding-bottom:6px;scrollbar-width:none}.site-header nav a{white-space:nowrap}.hero{padding-top:20px}.lead{font-size:16px}.dropzone{padding:26px 14px}.drop-title{font-size:19px}}.row:has(>input[type=checkbox]){flex-wrap:nowrap;align-items:flex-start}.row>input[type=checkbox]{margin-top:3px;flex:none}.wide-field{grid-column:1 / -1}.hint{font-size:12px;color:var(--muted);margin:0 0 4px}.cue-preview{min-height:1em;font-style:italic;overflow-wrap:anywhere}#syncOptions .row{gap:6px 8px}#syncOptions .row label{display:inline-flex;align-items:center;gap:6px}#syncOptions input[type=number]{width:72px}details.more{margin:4px 0}details.more summary{cursor:pointer;color:var(--link);font-size:13px}.enc-group{display:flex;gap:12px;flex-wrap:wrap}.merge-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px;counter-reset:part}.merge-list li{border:1px solid var(--border);border-radius:9px;padding:8px 10px;background:var(--bg);font-size:13px;counter-increment:part}.merge-top{display:flex;justify-content:space-between;align-items:center;gap:8px}.merge-name{overflow-wrap:anywhere}.merge-name:before{content:counter(part) ". ";color:var(--muted)}.merge-actions{display:flex;gap:4px;flex:none}.merge-info.error{color:var(--error);font-weight:600}.merge-empty{border:2px dashed var(--border);border-radius:9px;padding:28px 14px;text-align:center;margin:0;font-size:14px}input.invalid{border-color:var(--error);outline:1px solid var(--error)}#syncOptions input[type=text],.merge-offset input[type=text]{width:118px}.site-header nav.langs{margin-left:auto;gap:4px 12px;font-size:13px}.site-header nav.langs a[aria-current]{box-shadow:none;color:var(--text);font-weight:600}.related h3{font-size:18px;margin:22px 0 10px}.langs-footer span{color:var(--text)}