:root {
  --bg: #f6f6fb; --panel: #ffffff; --panel-2: #f1f1f8; --text: #1b1b29; --muted: #6b6b80; --line: #e4e4ef;
  --accent: #5b5bd6; --accent-2: #8e8ef0; --accent-soft: #ececfd; --ok: #1f9d6b; --err: #d4483b;
  --wave: #8e8ef0; --wave-sel: #5b5bd6; --sel-bg: rgba(91,91,214,.12);
  --radius: 14px; --shadow: 0 1px 2px rgba(20,20,50,.05), 0 4px 18px rgba(20,20,50,.05);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111118; --panel: #191922; --panel-2: #20202c; --text: #ececf4; --muted: #9a9ab0; --line: #2a2a38;
    --accent: #7c7cf0; --accent-2: #5d5dc9; --accent-soft: #24243a; --wave: #5d5dc9; --wave-sel: #9b9bff;
    --sel-bg: rgba(124,124,240,.16); --shadow: none; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #111118; --panel: #191922; --panel-2: #20202c; --text: #ececf4; --muted: #9a9ab0; --line: #2a2a38;
  --accent: #7c7cf0; --accent-2: #5d5dc9; --accent-soft: #24243a; --wave: #5d5dc9; --wave-sel: #9b9bff;
  --sel-bg: rgba(124,124,240,.16); --shadow: none; color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--bg); color: var(--text); font: 15px/1.55 system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; }
button, input, select { font: inherit; color: inherit; }
.hidden { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.spacer { flex: 1; }

.top { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; justify-content: space-between;
  height: 56px; padding: 0 20px; background: color-mix(in srgb, var(--bg) 85%, transparent); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); font-size: 17px; }
.brand svg { width: 28px; height: 28px; }
.brand b { font-weight: 650; }
.top-right { display: flex; gap: 8px; align-items: center; }
.chip { font-size: 12px; padding: 3px 10px; border-radius: 99px; background: var(--panel-2); color: var(--muted); border: 1px solid var(--line); }
.chip.ok { color: var(--ok); }
.icon-btn { border: 1px solid transparent; background: transparent; border-radius: 8px; width: 32px; height: 32px; cursor: pointer; color: var(--muted); }
.icon-btn:hover { background: var(--panel-2); color: var(--text); }

.layout { display: grid; grid-template-columns: 232px minmax(0, 1fr); max-width: 1180px; margin: 0 auto; gap: 24px; padding: 20px; }
.sidebar { position: sticky; top: 76px; align-self: start; display: flex; flex-direction: column; gap: 2px; }
.nav-group { font-size: 12px; color: var(--muted); margin: 14px 10px 4px; letter-spacing: .04em; }
.nav-group:first-child { margin-top: 0; }
.nav-item { display: flex; align-items: center; gap: 10px; padding: 8px 10px; border-radius: 10px; color: var(--text); text-decoration: none; }
.nav-item:hover { background: var(--panel-2); }
.nav-item.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.nav-item .ico { width: 22px; text-align: center; }
.nav-item .tag { margin-left: auto; font-size: 11px; color: var(--accent); background: var(--accent-soft); padding: 0 6px; border-radius: 6px; }

.main { display: flex; flex-direction: column; gap: 16px; min-width: 0; }
.tool-head h1 { margin: 0; font-size: 26px; letter-spacing: -.01em; }
.tool-head p { margin: 4px 0 0; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; box-shadow: var(--shadow); }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 10px; flex-wrap: wrap; }
.card-head h2 { font-size: 15px; margin: 0; }

.drop { border: 1.5px dashed color-mix(in srgb, var(--accent) 45%, var(--line)); border-radius: var(--radius); background: var(--panel);
  padding: 26px 18px 16px; text-align: center; transition: .15s; outline: none; }
.drop.over, .drop:focus-visible { background: var(--accent-soft); border-color: var(--accent); }
.drop.compact { padding: 12px 18px; }
.drop.compact .drop-icon, .drop.compact .drop-inner .small { display: none; }
.drop-icon { font-size: 30px; color: var(--accent); line-height: 1; margin-bottom: 6px; }
.drop-inner { display: flex; flex-direction: column; gap: 4px; align-items: center; }
.url-row { display: flex; gap: 8px; max-width: 560px; margin: 12px auto 0; }
.url-row input { flex: 1; min-width: 0; }
.link { background: none; border: 0; color: var(--accent); cursor: pointer; padding: 0; font-weight: 600; }

input[type=url], input[type=text], input[type=number], input.time, select {
  background: var(--panel-2); border: 1px solid var(--line); border-radius: 9px; padding: 7px 10px; min-width: 0; }
input:focus, select:focus { outline: 2px solid color-mix(in srgb, var(--accent) 40%, transparent); border-color: var(--accent); }
input.time { width: 110px; font-variant-numeric: tabular-nums; }
input[type=range] { accent-color: var(--accent); width: 100%; }

.btn { border-radius: 10px; padding: 8px 16px; cursor: pointer; border: 1px solid var(--line); background: var(--panel-2); }
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); color: #fff; border-color: var(--accent); font-weight: 600; padding: 10px 26px; }
.btn.primary:disabled { opacity: .45; cursor: not-allowed; }
.btn.ghost { background: transparent; }
.btn.small { padding: 4px 10px; font-size: 13px; }

.files, .jobs { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.file { display: grid; grid-template-columns: minmax(0, 1fr) 240px auto; align-items: center; gap: 12px; padding: 8px 10px; border-radius: 10px; background: var(--panel-2); }
.file.err { outline: 1px solid var(--err); }
.f-name { font-weight: 550; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.f-wave { width: 240px; height: 36px; }
.f-act { display: flex; }
.files:not(.ordered) .up { display: none; }

.wave-wrap { position: relative; border-radius: 10px; background: var(--panel-2); overflow: hidden; cursor: crosshair; touch-action: none; }
#wave { display: block; width: 100%; height: 140px; }
.playhead { position: absolute; top: 0; bottom: 0; width: 2px; background: var(--err); left: 0; display: none; pointer-events: none; }
.sel-row { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; margin-top: 10px; }
.sel-row label { display: flex; gap: 6px; align-items: center; }

.opts { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px 16px; }
.opts:empty { display: none; }
.opt { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }
.opt .val { color: var(--text); font-weight: 600; }
.opt.wide { grid-column: 1 / -1; }
.seg { display: inline-flex; flex-wrap: wrap; gap: 4px; background: var(--panel-2); padding: 3px; border-radius: 10px; border: 1px solid var(--line); }
.seg button { border: 0; background: transparent; padding: 5px 12px; border-radius: 8px; cursor: pointer; color: var(--text); font-size: 14px; }
.seg button.on { background: var(--panel); color: var(--accent); font-weight: 600; box-shadow: 0 1px 3px rgba(0,0,0,.12); }
.check { flex-direction: row; align-items: center; gap: 8px; color: var(--text); font-size: 14px; }

.enc { margin-top: 14px; border-top: 1px solid var(--line); padding-top: 12px; }
.enc summary { cursor: pointer; font-weight: 600; font-size: 14px; }
.presets { display: flex; flex-wrap: wrap; gap: 6px; margin: 10px 0; }
.presets button { border: 1px solid var(--line); background: var(--panel-2); border-radius: 99px; padding: 4px 12px; cursor: pointer; font-size: 13px; }
.presets button.on { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.enc-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.enc-grid label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }
.run-row { display: flex; align-items: center; gap: 14px; margin-top: 16px; flex-wrap: wrap; }

.job { padding: 10px 12px; border-radius: 10px; background: var(--panel-2); }
.job-head { display: flex; justify-content: space-between; gap: 8px; font-size: 14px; }
.bar { height: 5px; background: var(--line); border-radius: 99px; overflow: hidden; margin: 8px 0 4px; }
.bar i { display: block; height: 100%; background: var(--accent); width: 0; transition: width .3s; }
.job.done .bar { display: none; }
.job.error .job-err { color: var(--err); font-size: 13px; margin-top: 4px; white-space: pre-wrap; }
.outs { list-style: none; margin: 8px 0 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.out { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; background: var(--panel); border: 1px solid var(--line); border-radius: 9px; padding: 6px 10px; }
.out .o-name { flex: 1; min-width: 160px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.out audio { height: 32px; width: 240px; max-width: 100%; }
.out select { padding: 4px 8px; font-size: 13px; }
.ab.on { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.cancel { color: var(--err); }
.dl { color: #fff; background: var(--accent); text-decoration: none; padding: 4px 12px; border-radius: 8px; font-size: 13px; font-weight: 600; }

.user-box { position: relative; }
.menu { position: absolute; right: 0; top: 40px; min-width: 180px; background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
  box-shadow: 0 8px 28px rgba(0,0,0,.14); padding: 6px; display: flex; flex-direction: column; z-index: 20; }
.menu button, .menu a { text-align: left; background: none; border: 0; padding: 8px 10px; border-radius: 8px; cursor: pointer; color: var(--text); text-decoration: none; font-size: 14px; }
.menu button:hover, .menu a:hover { background: var(--panel-2); }
.menu-head { padding: 8px 10px; font-size: 13px; color: var(--muted); border-bottom: 1px solid var(--line); margin-bottom: 4px; }
.dlg { border: 1px solid var(--line); border-radius: 16px; padding: 0; background: var(--panel); color: var(--text); width: min(420px, calc(100% - 32px)); }
.dlg::backdrop { background: rgba(10,10,20,.45); }
.dlg-body { padding: 22px; display: flex; flex-direction: column; gap: 10px; position: relative; }
.dlg-body h2 { margin: 0; font-size: 18px; }
.dlg-body h3 { margin: 0 0 6px; font-size: 14px; }
.dlg-x { position: absolute; right: 10px; top: 10px; }
.auth-tabs { align-self: flex-start; }
.field { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }
.field input, .sect input { background: var(--panel-2); border: 1px solid var(--line); border-radius: 9px; padding: 9px 11px; font-size: 15px; }
.sect { border-top: 1px solid var(--line); padding-top: 12px; display: flex; flex-direction: column; gap: 8px; }
.sect .row { display: flex; gap: 8px; }
.sect .row input { flex: 1; min-width: 0; }
.err { color: var(--err); min-height: 1em; margin: 0; }
.wide { width: 100%; }
.center { text-align: center; }
.nav-item .lock { margin-left: auto; font-size: 12px; opacity: .7; }
.toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%) translateY(20px); background: var(--text); color: var(--bg);
  padding: 9px 16px; border-radius: 10px; opacity: 0; pointer-events: none; transition: .2s; font-size: 14px; max-width: calc(100% - 32px); }
.toast.show { opacity: 1; transform: translateX(-50%); }

@media (max-width: 820px) {
  .layout { grid-template-columns: 1fr; padding: 12px 16px; gap: 12px; }
  .sidebar { position: static; flex-direction: row; overflow-x: auto; gap: 4px; padding-bottom: 4px; scrollbar-width: none; }
  .nav-group { display: none; }
  .nav-item { white-space: nowrap; background: var(--panel); border: 1px solid var(--line); }
  .nav-item .tag { display: none; }
  .file { grid-template-columns: minmax(0, 1fr) auto; }
  .f-wave { display: none; }
  .top { padding: 0 16px; }
  #gpuChip { display: none; }
  .brand span { white-space: nowrap; }
  .out audio { width: 100%; }
}