/* Spec: ui/webdonhac/SPEC-LITE.md (12:47) + sketch-lite.src.html: VideoHQ "Dò nhạc" layout. Left = Video + list, right = timeline + player. */
:root{--g950:#030712;--g900:#111827;--g800:#1f2937;--g700:#374151;--g600:#4b5563;--g500:#6b7280;--g400:#9ca3af;--g300:#d1d5db;--g100:#f3f4f6;
--em700:#047857;--em600:#059669;--em500:#10b981;--em400:#34d399;--em300:#6ee7b7;--em900:#064e3b;--em200:#a7f3d0;--in300:#a5b4fc;
--rose500:#f43f5e;--rose400:#fb7185;--rose300:#fda4af;--rose950:#4c0519;--amb400:#fbbf24;--amb300:#fcd34d;--amb950:#451a03;--brand:#6366f1}
*{box-sizing:border-box;margin:0;padding:0}
[hidden]{display:none!important}
body{background:var(--g950);color:var(--g100);font-family:system-ui,"Segoe UI",Roboto,sans-serif;font-size:14px;min-height:100vh}
button{font:inherit;cursor:pointer;border:0;color:inherit;background:none}
button[disabled]{cursor:not-allowed}
.mono{font-family:ui-monospace,"Cascadia Mono",Consolas,monospace}
:focus-visible{outline:2px solid var(--em300);outline-offset:2px}
::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--g900)}::-webkit-scrollbar-thumb{background:var(--g700);border-radius:3px}
code{background:var(--g800);padding:1px 5px;border-radius:5px}
header{border-bottom:1px solid var(--g800);padding:0 24px;display:flex;align-items:center;gap:12px;background:rgba(3,7,18,.95);height:50px}
.app-mark{display:flex;align-items:center;gap:9px}
.note-icon{width:27px;height:27px;border-radius:8px;background:var(--em700);display:grid;place-items:center;color:#fff;font-size:17px}
.web-brand{font-size:18px;font-weight:700;color:#fff;line-height:1.1}
.header-sub{font-size:10px;color:var(--g400);margin-top:1px}
.header-source{margin-left:auto;color:var(--em300);font-size:12px;text-decoration:underline;text-underline-offset:2px}
main{max-width:1536px;margin:0 auto;padding:16px 24px 0}
.cols{display:grid;grid-template-columns:420px minmax(0,1fr);grid-template-areas:"left right";gap:24px;align-items:start}
.left{grid-area:left;width:420px;min-width:0;display:flex;flex-direction:column;gap:16px}
.right{grid-area:right;min-width:0;display:flex;flex-direction:column;gap:16px}
.card{background:var(--g900);border:1px solid var(--g800);border-radius:16px;padding:16px}
.card.tight{padding:12px}
h1{font-size:16px;font-weight:700;color:#fff;margin-bottom:4px}
h2{font-size:13px;font-weight:600;color:#fff}
.sub{font-size:11px;color:var(--g400)}
.lbl{display:block;font-size:10px;font-weight:600;color:var(--g400);text-transform:uppercase;letter-spacing:.05em;margin:12px 0 6px}
.row{display:flex;gap:8px;align-items:center}
.btn{padding:8px 10px;background:var(--g700);border-radius:9px;color:var(--g300);font-size:12px;white-space:nowrap}
.btn.sm{padding:6px 9px;border-radius:8px;font-size:11px}
.btn.primary{background:var(--em700);color:#fff;font-weight:600}.btn.primary:hover:not([disabled]){background:var(--em600)}
.btn.ghost{background:var(--g800);border:1px solid var(--g700);color:var(--g300)}.btn.ghost:hover:not([disabled]){background:#273244}
.btn.danger{background:var(--g800);color:#fca5a5;box-shadow:inset 0 0 0 1px rgba(248,113,113,.35)}
.btn.brand{background:var(--brand);color:#fff}
.btn[disabled]{opacity:.42}
.dev{font-size:9px;color:var(--g400);border:1px solid var(--g700);border-radius:5px;padding:1px 5px;white-space:nowrap;opacity:.8}
.dis{opacity:.55}
.pill{font-size:10px;padding:1px 6px;border-radius:6px;background:var(--g700);color:var(--g300);white-space:nowrap}
.pill.ok{background:rgba(16,185,129,.15);color:var(--em400)}
/* video card */
.big-pick{width:100%;padding:12px;font-size:13px}
.selected-file{display:flex;align-items:center;gap:8px;min-width:0;background:var(--g800);border:1px solid var(--g700);border-radius:9px;padding:6px 7px}
.selected-file .ficon{width:25px;height:25px;flex:none;display:grid;place-items:center;background:var(--g700);border-radius:6px;font-size:13px}
.selected-file>div:not(.ficon){min-width:0;flex:1;display:flex;align-items:baseline;gap:7px;white-space:nowrap;overflow:hidden}
.selected-file .fname{font-size:12px;font-weight:600;color:#fff;overflow:hidden;text-overflow:ellipsis}
.selected-file .fmeta{font-size:10px;color:var(--g400)}
.selected-file .btn{min-height:28px;padding:4px 9px}
.drop-note{margin-top:9px;border:1px dashed var(--g600);border-radius:9px;padding:6px 8px;color:var(--g400);font-size:10px;display:flex;align-items:center}
.mode-label{margin-top:10px;display:flex;justify-content:space-between;color:var(--g400);font-size:10px;font-weight:600;text-transform:uppercase;letter-spacing:.05em}
.nocase{text-transform:none;letter-spacing:0;font-weight:400}
.mode{display:grid;grid-template-columns:1fr 1fr;background:var(--g800);border:1px solid var(--g700);border-radius:10px;padding:3px;gap:3px;margin-top:5px}
.mode button{padding:7px;border-radius:7px;font-size:11px;color:var(--g300);text-align:left}
.mode button.on{background:var(--g700);color:#fff;box-shadow:inset 0 0 0 1px var(--g600)}
.mode button[disabled]{opacity:.6}
.mode small{display:block;color:var(--g400);font-size:9px;margin-top:2px}
.cached{display:inline-block;margin-left:3px;color:var(--em300);background:rgba(16,185,129,.15);padding:1px 4px;border-radius:4px}
.scan-row{margin-top:10px}
#status{margin-top:8px;padding-top:7px;border-top:1px solid var(--g800);font-size:11px;color:var(--g400);line-height:1.45}
#status:empty{display:none}
.st-main{color:var(--g300)}.st-main b{color:#fff}.ok{color:var(--em400)}
.progress{height:5px;background:var(--g800);border-radius:999px;overflow:hidden;margin-bottom:9px}
.progress i{display:block;height:100%;width:0;background:var(--em600);border-radius:999px;transition:width .3s}
.run-progress{margin:6px 0 4px}
.st-priv{font-size:10px;color:var(--g400)}
.box{margin-top:10px;border-radius:9px;padding:9px 10px;font-size:11px;line-height:1.45}
.box.err{background:#2a1215;border:1px solid rgba(248,113,113,.3);color:#fca5a5}
.box.err b{color:#fecaca;display:block;margin-bottom:3px;font-size:12px}
.box.err p{margin-top:3px}.box .btn{margin-top:8px}
.box.err details{margin-top:6px}.box.err pre{white-space:pre-wrap;font-size:10px;color:var(--g300);margin-top:4px;max-height:180px;overflow:auto}
.box.note{background:var(--g800);border:1px solid var(--g700);color:var(--g300)}.box.note .btn{margin:0 0 0 8px}
.box.warn{margin:0 0 12px;background:rgba(251,191,36,.08);border:1px solid rgba(251,191,36,.3);color:var(--amb300);font-size:12px}
/* list */
.list-card{display:flex;flex-direction:column;height:calc(100vh - 390px);min-height:450px}
.list-head{display:flex;align-items:center;gap:7px;margin-bottom:9px;white-space:nowrap}
.chips{flex-wrap:wrap;gap:5px}
.chip{display:inline-flex;align-items:center;gap:5px;padding:4px 8px;border-radius:999px;font-size:10px;user-select:none}
.chip b{font-weight:600}
.chip.a{background:var(--rose950);color:var(--rose300);box-shadow:inset 0 0 0 1px rgba(244,63,94,.5)}
.chip.b{background:var(--amb950);color:var(--amb300);box-shadow:inset 0 0 0 1px rgba(251,191,36,.5)}
.sw{width:8px;height:8px;border-radius:2px;display:inline-block}.sw.a{background:var(--rose500)}.sw.b{box-shadow:inset 0 0 0 2px var(--amb400)}
.review{font-size:10px;color:var(--g400);display:flex;justify-content:space-between;align-items:center;margin:7px 0 4px}
.review b{color:#fff}
.checkbox{width:13px;height:13px;border:1px solid var(--g600);border-radius:4px;display:inline-block;vertical-align:middle}
.seg-list{overflow-y:auto;flex:1;padding-right:2px}
.empty{text-align:center;color:var(--g400);font-size:12px;padding:32px 10px}
.empty b{display:block;color:#fff;font-size:13px;margin-bottom:5px}.empty .btn{margin-top:10px}
.seg{background:var(--g800);border:1px solid transparent;border-radius:9px;padding:7px 8px;display:grid;grid-template-columns:14px 1fr auto;gap:2px 6px;align-items:center;cursor:pointer;margin-bottom:5px}
.seg:hover{border-color:var(--g600);background:#273244}
.seg.sel{border-color:var(--em500);background:var(--em900)}
.seg .line{display:flex;align-items:center;gap:5px;white-space:nowrap}
.seg .ix{font-size:10px;color:var(--g400)}
.seg .time{font-size:11px;color:#fff}
.seg .len{font-size:10px;color:var(--g400)}
.seg.sel .ix,.seg.sel .len,.seg.sel .score{color:var(--em200)}
.tier{font-size:9px;font-weight:700;padding:1px 5px;border-radius:5px}
.tier.A{background:var(--rose950);color:var(--rose300)}.tier.B{background:var(--amb950);color:var(--amb300)}
.score{grid-column:2/4;display:flex;gap:5px;align-items:center;color:var(--g400);font-size:10px}
.score .mini{width:40px;height:3px;background:var(--g700);border-radius:4px;overflow:hidden}.score .mini i{display:block;height:100%;background:var(--g300)}
.seg.sel .score .mini i{background:var(--em400)}
.seg .playing-pill{display:none}.seg.sel .playing-pill{display:inline}
.row-actions{display:flex;gap:4px}
.row-actions button{width:23px;height:21px;border-radius:6px;background:var(--g700);color:var(--g400);font-size:10px;opacity:.45}
.bulk{margin-top:7px;background:rgba(99,102,241,.12);border:1px solid rgba(99,102,241,.4);border-radius:9px;padding:7px 8px;display:flex;align-items:center;gap:6px;font-size:10px;color:var(--in300)}
.bulk .btn:first-of-type{margin-left:auto}
/* timeline */
.timeline{padding:12px 14px 10px}
.tl-head{display:flex;align-items:center;gap:10px;margin-bottom:9px}
.legend{margin-left:auto;display:flex;gap:10px;font-size:9px;color:var(--g400);align-items:center}
.legend .disabled{opacity:.48}
.track{position:relative;height:44px;background:var(--g800);border-radius:9px;cursor:pointer}
.skel{position:absolute;inset:0;border-radius:9px;background:repeating-linear-gradient(90deg,#1f2937 0 18px,#232c3b 18px 36px)}
.mark{position:absolute;bottom:6px;border-radius:3px;min-width:4px;padding:0}
.mark.A{height:32px;background:var(--rose500)}
.mark.B{height:20px;background:rgba(251,191,36,.25);box-shadow:inset 0 0 0 2px var(--amb400)}
.mark.sel{outline:2px solid #fff;outline-offset:2px}
.playhead{position:absolute;top:-4px;bottom:-4px;width:2px;margin-left:-1px;background:#fff;border-radius:2px;z-index:3;pointer-events:none}
.tip{position:absolute;top:49px;transform:translateX(-50%);background:var(--g950);border:1px solid var(--g700);border-radius:8px;padding:5px 8px;font-size:9px;color:var(--g300);white-space:nowrap;box-shadow:0 6px 20px rgba(0,0,0,.5);z-index:5;pointer-events:none}
.tip b{color:#fff}
.ruler{position:relative;height:14px;margin-top:14px;font-size:9px;color:var(--g400)}
.ruler span{position:absolute;transform:translateX(-50%)}.ruler span:first-child{transform:none}
.ruler span::before{content:"";position:absolute;left:50%;top:-7px;width:1px;height:4px;background:var(--g700)}.ruler span:first-child::before{left:0}
/* player */
.player{padding:0;overflow:visible}
.ph{display:flex;align-items:center;gap:9px;padding:12px 14px;border-bottom:1px solid var(--g800);flex-wrap:wrap}
.ph-time{color:var(--g300)}
.pgrid{display:grid;grid-template-columns:minmax(0,1fr) 300px}
.vwrap{position:relative;aspect-ratio:16/9;background:#000}
.vwrap video{width:100%;height:100%;display:block;background:#000}
.v-idle{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;color:var(--g400);background:var(--g900)}
.v-idle-ic{font-size:40px;opacity:.3}.v-idle p{font-size:13px}
.vnote{padding:8px 14px;font-size:11px;color:var(--amb300);background:rgba(251,191,36,.08);border-top:1px solid var(--g800)}
.ctrls{padding:10px 14px;display:flex;flex-wrap:wrap;gap:8px;align-items:center;border-top:1px solid var(--g800)}
.seg3{display:flex;background:var(--g800);border:1px solid var(--g700);border-radius:8px;padding:2px}
.seg3 button{padding:5px 9px;border-radius:6px;font-size:10px;color:var(--g400)}
.seg3 button.on{background:var(--g900);color:#fff}.seg3 button[disabled]{opacity:.42}
.tg{display:inline-flex;align-items:center;gap:5px;font-size:10px;color:var(--g400);padding:5px 8px;border-radius:7px;background:var(--g800);border:1px solid var(--g700);opacity:.45}
.judge{padding:10px 14px 14px;display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.judge .big{padding:9px 12px;border-radius:9px;font-weight:600;font-size:11px}
.ok-btn,.no-btn{background:var(--g800);border:1px solid var(--g700);color:var(--g300);opacity:.46}  /* placeholders: both look off (ui review PR#1) */
.detail{border-left:1px solid var(--g800);padding:12px 14px;font-size:11px;color:var(--g400);display:flex;flex-direction:column;gap:9px}
.kv{display:grid;grid-template-columns:auto 1fr;gap:5px 10px;align-items:center}
.kv dt,.kv-l{color:var(--g400)}.kv-l{margin-bottom:5px}.kv dd{color:var(--g100)}
.warnbox{background:rgba(251,191,36,.08);border:1px solid rgba(251,191,36,.25);border-radius:8px;padding:7px 8px;color:var(--amb300);font-size:10px;line-height:1.4}
.hint{font-size:11px;color:var(--g400);line-height:1.45}
.web-footer{border-top:1px solid var(--g800);margin:0 0 8px;padding:9px 2px 3px;font-size:10px;color:var(--g400);line-height:1.55}
.web-footer b{color:#fff}
.web-footer .source{color:var(--em300);text-decoration:underline;text-underline-offset:2px}
#drag-overlay{position:fixed;inset:0;background:rgba(3,7,18,.82);display:grid;place-items:center;z-index:50;pointer-events:none}
#drag-overlay>div{border:2px dashed var(--em500);border-radius:20px;padding:48px 72px;text-align:center;background:rgba(6,78,59,.25)}
.ov-title{font-size:20px;font-weight:700;color:#fff}.ov-sub{font-size:13px;color:var(--g300);margin-top:4px}
/* state visibility (spec §2) */
body[data-state=idle] .selected-file{display:none}
body:not([data-state=idle]) .pick-idle{display:none}
body[data-state=idle] .scan-row,body[data-state=idle] #status{display:none}
body:not([data-state=idle]) .v-idle{display:none}
body:not([data-state=model]):not([data-state=scanning]) #progress,body:not([data-state=model]):not([data-state=scanning]) .st-priv{display:none}
body[data-state=model] #btn-scan,body[data-state=scanning] #btn-scan,body[data-state=error-codec] #btn-scan{display:none}
body:not([data-state=model]):not([data-state=scanning]) #btn-cancel{display:none}
@media(max-width:1279px){.left{width:360px}.cols{grid-template-columns:360px minmax(0,1fr)}.pgrid{grid-template-columns:1fr}.detail{border-left:0;border-top:1px solid var(--g800)}.legend{gap:5px;font-size:8px}}
/* phase 2 (phone) ready: one column in reading order, 40px touch targets */
@media(max-width:1023px){.cols{grid-template-columns:1fr;grid-template-areas:"file" "timeline" "player" "list" "footer";gap:16px}.left,.right{display:contents}
.file-card{grid-area:file}.timeline{grid-area:timeline}.player{grid-area:player}.list-card{grid-area:list;height:auto}.web-footer{grid-area:footer}
button,.seg{min-height:40px}.timeline .tip{display:none}.detail{font-size:12px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}

/* ---------- browser gate (gate.js) ---------- */
body[data-gate]:not([data-gate=ok]) main,body[data-gate]:not([data-gate=ok]) #drag-overlay{display:none!important}  /* app page only; credits.html has no data-gate */
#unsupported{display:none;max-width:640px;margin:48px auto;padding:0 20px}
body[data-gate=unsupported] #unsupported{display:block}
.uns-card{background:var(--g900);border:1px solid var(--g800);border-radius:16px;padding:28px 28px 20px}
.uns-icon{font-size:30px;margin-bottom:8px}
.uns-title{font-size:20px;font-weight:700;color:var(--g100);margin:0 0 12px;line-height:1.35}
.uns-card p{color:var(--g300);line-height:1.6;margin:0 0 10px}
.uns-card b{color:var(--g100)}
.uns-url{display:block;background:var(--g950);border:1px solid var(--g700);border-radius:10px;padding:10px 12px;color:var(--em300);font-size:13px;word-break:break-all;user-select:all;margin:0 0 16px}
.uns-why{border-top:1px solid var(--g800);padding-top:12px}
.uns-reasons{margin:6px 0 0;padding-left:20px;color:var(--g400);line-height:1.6}
.uns-foot{margin-top:16px;font-size:11px;color:var(--g400)}
.uns-foot a,.uns-foot a:visited{color:var(--em300);text-decoration:underline;text-underline-offset:2px}