/* app.css — 无外部字体/无第三方资源；深色、以工具为主体 */
:root {
  --bg: #0e1116;
  --panel: #151a21;
  --panel2: #1b222b;
  --line: #262f3a;
  --fg: #e6edf5;
  --dim: #8b98a8;
  --accent: #4c9aff;
  --ok: #3fb950;
  --warn: #d29922;
  --err: #f85149;
  --pro: #d2a8ff;
  --mono: ui-monospace, SFMono-Regular, "Cascadia Mono", Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Microsoft YaHei", sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg); color: var(--fg); font: 14px/1.45 var(--sans);
  display: flex; flex-direction: column; min-height: 100vh;
}
code { font-family: var(--mono); background: var(--panel2); padding: 1px 5px; border-radius: 4px; }
h2 { font-size: 12px; text-transform: uppercase; letter-spacing: .08em; color: var(--dim); margin: 18px 0 8px; }
h2:first-child { margin-top: 0; }

/* ── 顶栏 ── */
.top {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; padding: 10px 16px; border-bottom: 1px solid var(--line);
  background: var(--panel); position: sticky; top: 0; z-index: 20;
}
.brand { font-weight: 650; letter-spacing: .01em; }
.brand .sub { font-weight: 400; color: var(--dim); margin-left: 8px; font-size: 12px; }
.top-right { display: flex; align-items: center; gap: 8px; }
.badge { font-size: 11px; padding: 2px 8px; border-radius: 999px; border: 1px solid var(--line); }
.badge.free { color: var(--dim); }
.badge.pro { color: var(--pro); border-color: var(--pro); }

/* ── 投放区 ── */
.drop {
  margin: 18px 16px; padding: 22px; border: 1.5px dashed var(--line); border-radius: 12px;
  text-align: center; background: var(--panel);
}
.drop.over { border-color: var(--accent); background: #17202c; }
.drop .lead { margin: 12px 0 6px; }
.drop .hint { color: var(--dim); font-size: 12px; margin: 4px 0 0; }
/* 载入文件后收缩为一条工具条，把首屏让给时间轴 */
.drop.compact {
  margin: 10px 16px; padding: 8px 12px; display: flex; align-items: center; gap: 12px;
  text-align: left; border-style: solid;
}
.drop.compact .lead, .drop.compact .hint { display: none; }
.drop.compact button.big { font-size: 13px; padding: 6px 12px; }
.drop.compact::after { content: "Drop more files anywhere on this page — or use the button."; color: var(--dim); font-size: 12px; }

/* ── 布局 ── */
.workspace {
  display: grid; gap: 12px; padding: 0 16px 16px;
  grid-template-columns: 236px minmax(420px, 1fr) 320px;
  align-items: start;
}
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 14px; }
.col-files, .col-ops { position: sticky; top: 62px; max-height: calc(100vh - 78px); overflow: auto; }
@media (max-width: 1180px) {
  .workspace { grid-template-columns: 1fr; }
  .col-files, .col-ops { position: static; max-height: none; }
}

/* ── 控件 ── */
button {
  font: inherit; color: var(--fg); background: var(--panel2); border: 1px solid var(--line);
  border-radius: 8px; padding: 6px 10px; cursor: pointer;
}
button:hover:not(:disabled) { border-color: #3a4657; background: #202834; }
button:disabled { opacity: .45; cursor: not-allowed; }
button.primary { background: #1d4e8f; border-color: #2a67b5; }
button.primary:hover { background: #22589f; }
button.ghost { background: transparent; }
button.big { font-size: 15px; padding: 10px 18px; }
.wide { width: 100%; margin-top: 6px; }
.row { display: flex; gap: 6px; align-items: center; margin-top: 8px; }
.row > * { flex: 1 1 auto; }
.arrow { flex: 0 0 auto; color: var(--dim); }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin-top: 6px; }
.chips { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 6px; }
.chips button { padding: 3px 7px; font-family: var(--mono); font-size: 12px; }
.lab { display: block; margin-top: 10px; font-size: 12px; color: var(--dim); }
.lab input, .lab select, .row select, .row input {
  display: block; width: 100%; margin-top: 4px; font: inherit; color: var(--fg);
  background: var(--panel2); border: 1px solid var(--line); border-radius: 8px; padding: 6px 8px;
}
.radio { display: block; margin: 6px 0; font-size: 13px; color: var(--fg); }
.hint { color: var(--dim); font-size: 12px; }
.count { color: var(--dim); font-weight: 400; }
.pro-tag { color: var(--pro); font-size: 10px; border: 1px solid var(--pro); border-radius: 4px; padding: 0 3px; margin-left: 4px; }
.hidden-x { display: none; }

/* ── 文件列表 ── */
.file-list { display: flex; flex-direction: column; gap: 4px; }
.file-row {
  display: flex; flex-direction: column; align-items: flex-start; gap: 2px;
  text-align: left; padding: 7px 9px; border-radius: 8px;
}
.file-row.on { border-color: var(--accent); background: #172436; }
.fname { font-size: 12.5px; word-break: break-all; }
.fmeta { font-size: 11px; color: var(--dim); font-family: var(--mono); }

/* ── 时间轴 ── */
.tl-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; margin-bottom: 8px; }
.file-meta { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.file-meta strong { word-break: break-all; }
.file-meta span { font-family: var(--mono); font-size: 11px; color: var(--dim); }
.tl-actions { display: flex; gap: 4px; flex-wrap: wrap; }
.warnings { margin-bottom: 8px; }
.warnings ul { margin: 0; padding-left: 18px; color: var(--warn); font-size: 12.5px; }
.warnings .ok { color: var(--ok); font-size: 12.5px; }
.table-wrap { max-height: calc(100vh - 230px); overflow: auto; border: 1px solid var(--line); border-radius: 8px; }
table { border-collapse: collapse; width: 100%; }
thead th {
  position: sticky; top: 0; z-index: 2; background: var(--panel2); text-align: left;
  font-size: 11px; text-transform: uppercase; letter-spacing: .06em; color: var(--dim);
  padding: 7px 8px; border-bottom: 1px solid var(--line); font-weight: 500;
}
tbody td { border-bottom: 1px solid #1e252e; padding: 4px 8px; vertical-align: top; }
tbody tr:hover { background: #171e27; }
tbody tr.sel { background: #172436; }
tbody tr.bad { box-shadow: inset 3px 0 0 var(--err); }
.num, .dur, .c-metric, .c-num, .c-dur, .c-tc { font-family: var(--mono); font-size: 12.5px; }
.c-sel, .c-del { width: 26px; }
.c-num { width: 34px; }
.c-tc { width: 108px; }
.c-dur { width: 62px; }
.c-metric { width: 42px; text-align: right; }
.flag { color: var(--warn); }
input.tc {
  width: 100px; font-family: var(--mono); font-size: 12.5px; color: var(--fg);
  background: transparent; border: 1px solid transparent; border-radius: 5px; padding: 3px 4px;
}
input.tc:hover { border-color: var(--line); }
input.tc:focus { border-color: var(--accent); background: var(--bg); outline: none; }
textarea.txt {
  width: 100%; min-height: 26px; resize: vertical; font: inherit; color: var(--fg);
  background: transparent; border: 1px solid transparent; border-radius: 5px; padding: 3px 4px;
}
textarea.txt:hover { border-color: var(--line); }
textarea.txt:focus { border-color: var(--accent); background: var(--bg); outline: none; }
button.mini { padding: 2px 6px; font-size: 12px; line-height: 1; }
button.danger { color: var(--err); }

/* ── 检查面板 ── */
.summary { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin: 10px 0; font-size: 12px; color: var(--dim); }
.summary div { background: var(--panel2); border-radius: 8px; padding: 6px 8px; }
.summary span { display: block; color: var(--fg); font-family: var(--mono); font-size: 15px; }
.issues { max-height: 260px; overflow: auto; }
.issue-head { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 6px; }
.issue-head .tag { font-size: 11px; padding: 2px 6px; }
.issues ul { margin: 0; padding-left: 16px; font-size: 12.5px; }
.issues li { margin: 3px 0; color: var(--warn); }
.issues li.err { color: var(--err); }
.issues a { color: var(--accent); font-family: var(--mono); text-decoration: none; }
.issues .ok { color: var(--ok); }
details.th { margin: 8px 0; font-size: 12px; color: var(--dim); }
details.th summary { cursor: pointer; }

/* ── 页脚 ── */
.foot { margin-top: auto; padding: 14px 16px 22px; border-top: 1px solid var(--line); color: var(--dim); font-size: 12.5px; }
.foot p { margin: 4px 0; max-width: 900px; }

/* ── 无障碍 ── */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; } }