:root {
  --primary: #2563EB;
  --primary-dark: #1D4ED8;
  --primary-soft: #EAF1FE;
  --accent: #D97706;
  --accent-soft: #FEF3E2;
  --accent-fg: #B45309;
  --danger-fg: #B91C1C;
  --bg: #F8FAFC;
  --fg: #0F172A;
  --muted: #F1F5FD;
  --muted-fg: #5B6B85;
  --border: #E4ECFC;
  --border-strong: #C9D8F5;
  --ok: #15803D;
  --ok-soft: #E9F7EF;
  --danger: #DC2626;
  --danger-soft: #FDECEC;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(15, 23, 42, .04);
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  --mono: "Fira Code", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 1180px; margin: 0 auto; padding: 0 20px; }

/* ---------------------------------------------------------- 顶栏 */
.topbar {
  background: #fff;
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
.brand-mark {
  width: 38px; height: 38px; flex: none;
  display: grid; place-items: center;
  border-radius: 9px;
  background: var(--primary);
  color: #fff;
}
.brand-mark svg { width: 21px; height: 21px; }
.brand-text { min-width: 0; }
.brand-text h1 { margin: 0; font-size: 17px; font-weight: 600; letter-spacing: .2px; }
.brand-text p { margin: 1px 0 0; font-size: 12.5px; color: var(--muted-fg); }
.topbar-meta {
  font-size: 12.5px;
  color: var(--muted-fg);
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.topbar-meta b { color: var(--fg); font-weight: 600; }
.topbar-meta a {
  color: var(--primary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 8px;
  border-radius: 6px;
}
.topbar-meta a:hover { background: var(--primary-soft); }
.topbar-meta a:hover { text-decoration: underline; }

main { padding: 22px 20px 40px; }

/* ---------------------------------------------------------- 模式切换 */
.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  color: var(--muted-fg);
  background: #fff;
  border: 1px solid var(--border-strong);
  border-radius: 9px;
  padding: 10px 16px;
  min-height: 42px;
  cursor: pointer;
  transition: color .18s ease, border-color .18s ease, background .18s ease;
}
.tab:hover { color: var(--fg); border-color: var(--primary); }
.tab.is-active {
  color: #fff;
  background: var(--primary);
  border-color: var(--primary);
}
.tab:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.tab-no {
  font-size: 13px;
  font-weight: 700;
  opacity: .75;
}

/* ---------------------------------------------------------- 卡片 */
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}
.card-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.card-head h2 { margin: 0; font-size: 15px; font-weight: 600; }
.step {
  width: 22px; height: 22px; flex: none;
  border-radius: 6px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 12px; font-weight: 700;
  display: grid; place-items: center;
}
.step-ok { background: var(--ok-soft); color: var(--ok); }
.step-ok svg { width: 13px; height: 13px; }
.tag {
  font-size: 12px;
  color: var(--muted-fg);
  background: var(--muted);
  border-radius: 20px;
  padding: 2px 10px;
}
.tag-req { background: var(--accent-soft); color: var(--accent-fg); }

/* ---------------------------------------------------------- 拖拽区 */
.drop {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  min-height: 152px;
  padding: 20px;
  border: 1.5px dashed var(--border-strong);
  border-radius: var(--radius);
  background: #FCFDFF;
  cursor: pointer;
  text-align: center;
  transition: border-color .18s ease, background .18s ease;
}
.drop:hover, .drop:focus-visible { border-color: var(--primary); background: var(--primary-soft); outline: none; }
.drop.dragover { border-color: var(--primary); background: var(--primary-soft); }
.drop.has-file { border-style: solid; border-color: var(--ok); background: var(--ok-soft); }
.drop-icon { width: 30px; height: 30px; color: var(--primary); }
.drop-title { font-size: 14px; font-weight: 500; }
.drop-hint { font-size: 12.5px; color: var(--muted-fg); }
.drop-sm { min-height: 124px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

.picked {
  margin-top: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  background: var(--muted);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
}
.picked .picked-name { font-weight: 500; word-break: break-all; }
.picked .picked-size { color: var(--muted-fg); font-family: var(--mono); font-size: 12px; }
.picked .picked-clear {
  margin-left: auto; flex: none;
  border: 0; background: transparent; color: var(--muted-fg);
  cursor: pointer; font-size: 17px; line-height: 1; padding: 4px;
  min-width: 32px; min-height: 32px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 6px;
}
.picked .picked-clear:hover { background: #E2E8F4; }
.picked .picked-clear:hover { color: var(--danger); }
.picked-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

/* ---------------------------------------------------------- 高级设置 */
.adv summary {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 600;
  min-height: 36px;
}
.adv summary::-webkit-details-marker { display: none; }
.adv .adv-title { font-weight: 600; }
.adv .chev { width: 18px; height: 18px; margin-left: auto; color: var(--muted-fg); transition: transform .2s ease; }
.adv[open] .chev { transform: rotate(180deg); }
.adv-body {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.field { display: flex; flex-direction: column; gap: 5px; }
.field > label { font-size: 13px; font-weight: 500; }
.field small { font-size: 12px; color: var(--muted-fg); line-height: 1.45; }
.field input[type="time"],
.field input[type="number"],
.field select {
  font-family: inherit;
  font-size: 14px;
  color: var(--fg);
  background: #fff;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  padding: 8px 10px;
  min-height: 38px;
}
.field input:focus, .field select:focus { outline: 2px solid var(--primary); outline-offset: -1px; border-color: var(--primary); }
.field-check { justify-content: flex-start; }
.check { display: flex; align-items: center; gap: 8px; font-size: 13.5px; font-weight: 500; cursor: pointer; min-height: 32px; }
.check input { width: 18px; height: 18px; accent-color: var(--primary); flex: none; }

/* ---------------------------------------------------------- 按钮 */
.actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin: 4px 0 22px; }
.btn-primary, .btn-ghost, .btn-dl {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  border-radius: 8px;
  padding: 10px 18px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background .18s ease, border-color .18s ease, color .18s ease;
  text-decoration: none;
}
.btn-primary { background: var(--primary); color: #fff; min-height: 42px; }
.btn-primary:hover:not(:disabled) { background: var(--primary-dark); }
.btn-primary:disabled { background: #B9C6DE; cursor: not-allowed; }
.btn-primary svg { width: 15px; height: 15px; }
.btn-ghost { background: #fff; color: var(--muted-fg); border-color: var(--border-strong); }
.btn-ghost:hover { color: var(--fg); border-color: var(--primary); }
.actions-hint { font-size: 13px; color: var(--muted-fg); }

/* ---------------------------------------------------------- 结果 */
.result .card-result { border-color: var(--border-strong); }
.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin-bottom: 14px;
}
.metric {
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 12px 14px;
  background: #FCFDFF;
}
.metric .m-label { font-size: 12.5px; color: var(--muted-fg); }
.metric .m-value { font-size: 21px; font-weight: 600; font-family: var(--mono); letter-spacing: -.4px; }
.metric .m-value small { font-size: 12px; font-weight: 500; color: var(--muted-fg); margin-left: 3px; font-family: var(--sans); }

.cats { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.cat {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  border: 1px solid var(--border);
  background: var(--muted);
  border-radius: 20px;
  padding: 5px 13px;
}
.cat b { font-family: var(--mono); }
.cat .cat-rate { color: var(--accent-fg); font-weight: 600; }

.notes { display: flex; flex-direction: column; gap: 7px; margin-bottom: 16px; }
.note {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  font-size: 13px;
  border-radius: 8px;
  padding: 9px 12px;
  background: var(--muted);
  border: 1px solid var(--border);
  color: var(--fg);
}
.note.warn { background: var(--accent-soft); border-color: #F5DDB6; }
.note svg { width: 15px; height: 15px; flex: none; margin-top: 2px; }
.note.warn svg { color: var(--accent); }
.note.ok svg { color: var(--ok); }

.downloads { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 20px; }
.btn-dl {
  background: #fff;
  border-color: var(--border-strong);
  color: var(--fg);
  padding: 11px 16px;
}
.btn-dl:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-soft); }
.btn-dl svg { width: 16px; height: 16px; color: var(--primary); }
.btn-dl .dl-meta { font-size: 12px; color: var(--muted-fg); font-family: var(--mono); }

.preview-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 10px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.preview-head h3 { margin: 0; font-size: 14px; font-weight: 600; }
.preview-head span { font-size: 12.5px; color: var(--muted-fg); }
.table-wrap { overflow: auto; border: 1px solid var(--border); border-radius: 9px; max-height: 520px; }
table { border-collapse: collapse; width: 100%; font-size: 13px; white-space: nowrap; }
thead th {
  position: sticky; top: 0;
  background: var(--muted);
  font-weight: 600;
  text-align: left;
  padding: 9px 11px;
  border-bottom: 1px solid var(--border);
  z-index: 1;
}
tbody td { padding: 8px 11px; border-bottom: 1px solid #F1F5F9; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: #FBFDFF; }
td.num, th.num { font-family: var(--mono); text-align: right; }
.pill { border-radius: 20px; padding: 1px 9px; font-size: 12px; display: inline-block; }
.pill-平日 { background: var(--primary-soft); color: var(--primary); }
.pill-周末 { background: var(--accent-soft); color: var(--accent-fg); }
.pill-节假日 { background: var(--danger-soft); color: var(--danger-fg); }
.pill-小夜 { background: #EEE9FD; color: #6D45D9; }

.alert {
  background: var(--danger-soft);
  border: 1px solid #F6C7C7;
  color: #8C1D1D;
  border-radius: 9px;
  padding: 12px 15px;
  margin-bottom: 16px;
  font-size: 13.5px;
  white-space: pre-wrap;
}

.spinner {
  width: 15px; height: 15px;
  border: 2px solid rgba(255, 255, 255, .45);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

.foot { color: var(--muted-fg); font-size: 12.5px; line-height: 1.75; }
.foot p { margin: 0 0 6px; }
.foot strong { color: var(--fg); font-weight: 600; }

/* ---------------------------------------------------------- 响应式 */
@media (max-width: 900px) {
  .grid2, .picked-row { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .wrap { padding: 0 14px; }
  main { padding: 16px 14px 32px; }
  .card { padding: 15px 14px; }
  .topbar-inner { padding: 13px 14px; }
  .brand-text h1 { font-size: 15.5px; }
  .brand-text p { font-size: 12px; }
  .drop { min-height: 128px; }
  .drop-sm { min-height: 104px; }
  .actions { gap: 10px; }
  .btn-primary, .btn-ghost { flex: 1 1 auto; justify-content: center; }
  .tabs { gap: 6px; }
  .tab { flex: 1 1 100%; justify-content: center; padding: 10px 12px; }
  .actions-hint { width: 100%; }
  .metrics { grid-template-columns: 1fr 1fr; }
  .metric .m-value { font-size: 18px; }
  .downloads { flex-direction: column; }
  .btn-dl { justify-content: center; }
}