:root {
  --bg: #eef2f7;
  --bg-2: #f8fafc;
  --card: #ffffff;
  --card-blue: #e7f3ff;
  --card-accent: #f3e8ff;
  --text: #0f172a;
  --muted: #64748b;
  --border: #dbe2ea;
  --border-blue: #3b82f6;
  --primary: #2563eb;
  --primary-2: #1d4ed8;
  --good: #16a34a;
  --warn: #d97706;
  --bad: #dc2626;
  --hl: #ffd54f;
  --hl-blue: #bae6fd;
  --shadow: 0 2px 10px rgba(15,23,42,.06);
}
[data-theme="dark"] {
  --bg: #0b1220;
  --bg-2: #111a2e;
  --card: #16213a;
  --card-blue: #14305a;
  --card-accent: #2a1b4a;
  --text: #e5edf8;
  --muted: #93a3c2;
  --border: #24334f;
  --border-blue: #3b82f6;
  --primary: #3b82f6;
  --primary-2: #60a5fa;
  --good: #4ade80;
  --warn: #fbbf24;
  --bad: #f87171;
  --hl: #f59e0b;
  --hl-blue: #2563eb;
  --shadow: 0 2px 14px rgba(0,0,0,.35);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, "Segoe UI", "Microsoft JhengHei", "PingFang TC", sans-serif;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
  color: var(--text);
  min-height: 100vh;
  font-size: 15px;
}

.app-header {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 60%, #2563eb 100%);
  color: #fff; padding: 16px 20px; flex-wrap: wrap;
}
.app-header h1 { margin: 0; font-size: 1.25rem; font-weight: 800; }
.app-header p { margin: 4px 0 0; color: #c7d7fe; font-size: .85rem; }
.brand { display: flex; align-items: center; gap: 12px; }
.logo { font-size: 2rem; }
.btn {
  border: none; border-radius: 8px; padding: 9px 14px; cursor: pointer;
  font-weight: 600; font-size: .9rem; background: var(--primary); color: #fff;
}
.btn:hover { background: var(--primary-2); }
.btn-ghost { background: rgba(255,255,255,.15); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,.25); }
.btn-sm { padding: 6px 10px; font-size: .82rem; }
.btn-danger { background: var(--bad); }
.tab-bar {
  display: flex; gap: 6px; flex-wrap: wrap; background: var(--card);
  border-bottom: 1px solid var(--border); padding: 8px 12px; position: sticky; top: 0; z-index: 10;
}
.tab {
  border: 1px solid transparent; background: transparent; color: var(--text);
  border-radius: 8px; padding: 9px 14px; cursor: pointer; font-weight: 600; font-size: .9rem;
}
.tab:hover { background: var(--bg-2); }
.tab.active { background: linear-gradient(135deg, var(--primary), var(--primary-2)); color: #fff; }

main { padding: 16px; max-width: 1500px; margin: 0 auto; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

.card {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 16px; margin-bottom: 14px; box-shadow: var(--shadow);
}
.banner {
  border: 1px solid var(--border); border-left: 6px solid var(--border);
  border-radius: 9px; padding: 11px 15px; margin: 8px 0 12px; font-weight: 700;
}
.banner.manual { background: var(--card); border-color: #cbd5e1; color: var(--text); }
.banner.auto { background: var(--card-blue); border-color: var(--border-blue); color: #0b3d7a; }
.banner.accent { background: var(--card-accent); border-color: #a855f7; color: #5b21b6; }
[data-theme="dark"] .banner.auto { color: #dbeafe; }
[data-theme="dark"] .banner.accent { color: #e9d5ff; }

.grid { display: grid; gap: 10px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

.field { display: flex; flex-direction: column; gap: 4px; }
.field label { font-size: .8rem; color: var(--muted); font-weight: 600; }
.field input, .field select {
  border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px;
  font-size: .92rem; background: var(--card); color: var(--text);
}
.field input:focus, .field select:focus { outline: 2px solid var(--border-blue); }
.field.auto input { background: var(--card-blue); font-weight: 600; color: #0b3d7a; }
[data-theme="dark"] .field.auto input { color: #dbeafe; }
.metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
@media (max-width: 900px) { .metrics { grid-template-columns: repeat(2, 1fr); } }
.metric {
  background: var(--card); border: 1px solid var(--border); border-radius: 10px;
  padding: 10px 12px; text-align: center;
}
.metric .label { font-size: .75rem; color: var(--muted); }
.metric .value { font-size: 1.05rem; font-weight: 700; margin-top: 3px; }

.table-wrap { overflow: auto; border: 1px solid var(--border); border-radius: 10px; background: var(--card); }
table { border-collapse: collapse; width: 100%; font-size: .85rem; }
th, td { border-bottom: 1px solid var(--border); padding: 7px 9px; text-align: right; white-space: nowrap; }
th { background: var(--bg-2); position: sticky; top: 0; z-index: 2; font-weight: 700; }
th:first-child, td:first-child { position: sticky; left: 0; background: var(--card); z-index: 1; text-align: left; }
td input { width: 100%; min-width: 70px; border: 1px solid var(--border); border-radius: 6px; padding: 5px 7px; background: var(--card); color: var(--text); }
td.auto, td.derived { background: var(--card-blue); color: #0b3d7a; }
[data-theme="dark"] td.auto, [data-theme="dark"] td.derived { color: #dbeafe; }
td.cell-hl { background: var(--hl) !important; font-weight: 700; text-align: center; }
tr.row-hl td { background: var(--hl-blue) !important; font-weight: 600; }

.warn-box { border: 1px solid var(--border); border-left: 5px solid var(--warn); border-radius: 8px; padding: 10px 14px; margin: 6px 0; background: var(--card); }
.warn-box.ok { border-left-color: var(--good); }
.warn-box.bad { border-left-color: var(--bad); }

.chart-box { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 14px; }
h2, h3 { letter-spacing: .2px; }
.muted { color: var(--muted); font-size: .85rem; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }

.toast {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%);
  background: #0f172a; color: #fff; padding: 12px 20px; border-radius: 10px;
  opacity: 0; pointer-events: none; transition: opacity .25s; z-index: 100; font-size: .9rem;
}
.toast.show { opacity: 1; }
.toast.error { background: var(--bad); }
.toast.success { background: var(--good); }

/* 大表前 4 欄凍結（業種、代號、名稱、現在股價） */
table.freeze4 th:nth-child(1), table.freeze4 td:nth-child(1) { position: sticky; left: 0; z-index: 4; min-width: 90px; background: var(--card); }
table.freeze4 th:nth-child(2), table.freeze4 td:nth-child(2) { position: sticky; left: 90px; z-index: 4; min-width: 90px; background: var(--card); }
table.freeze4 th:nth-child(3), table.freeze4 td:nth-child(3) { position: sticky; left: 180px; z-index: 4; min-width: 110px; background: var(--card); }
table.freeze4 th:nth-child(4), table.freeze4 td:nth-child(4) { position: sticky; left: 290px; z-index: 4; min-width: 90px; background: var(--card); }
table.freeze4 th:nth-child(-n+4) { z-index: 5; background: var(--bg-2); }