:root {
  --bg: #f6f7f9; --card: #fff; --text: #1d2330; --muted: #6b7280; --border: #e5e7eb;
  --accent: #2563eb; --up: #d62d2d; --down: #129a52; /* 台股慣例：紅漲綠跌 */
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #12151b; --card: #1b2029; --text: #e6e8ec; --muted: #9aa3b2; --border: #2b3240; --accent: #5b8cff; --up: #ff5c5c; --down: #2fc27a; }
}
* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, "Microsoft JhengHei", "PingFang TC", sans-serif; background: var(--bg); color: var(--text); }
header { display: flex; align-items: center; gap: 24px; padding: 12px 24px; background: var(--card); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 2; flex-wrap: wrap; }
h1 { font-size: 20px; margin: 0; }
nav { display: flex; gap: 4px; }
nav button { border: 0; background: none; padding: 8px 14px; border-radius: 8px; font-size: 15px; color: var(--muted); cursor: pointer; }
nav button.active { background: var(--accent); color: #fff; }
#updated { margin-left: auto; }
#logoutBtn { padding: 6px 12px; }
main { max-width: 1200px; margin: 0 auto; padding: 20px 16px; }
.tab { display: none; } .tab.active { display: block; }
.muted { color: var(--muted); } .small { font-size: 13px; }
.up { color: var(--up); } .down { color: var(--down); }
.r { text-align: right; }

.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; margin-bottom: 16px; }
.kpi { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 14px 16px; }
.kpi .label { font-size: 13px; color: var(--muted); }
.kpi .value { font-size: 22px; font-weight: 600; margin-top: 4px; font-variant-numeric: tabular-nums; }
.kpi .sub { font-size: 13px; margin-top: 2px; }

.toolbar { display: flex; gap: 8px; align-items: center; margin-bottom: 12px; flex-wrap: wrap; }
.toolbar form { display: flex; gap: 8px; flex-wrap: wrap; }
.spacer { flex: 1; }
input { padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px; background: var(--card); color: var(--text); font-size: 14px; width: 130px; }
button, .btn { padding: 8px 14px; border: 1px solid var(--accent); background: var(--accent); color: #fff; border-radius: 8px; font-size: 14px; cursor: pointer; }
.btn { background: var(--card); color: var(--accent); }
.link { border: 0; background: none; color: var(--muted); padding: 2px 6px; cursor: pointer; }
.link:hover { color: var(--up); }

.table-wrap { overflow-x: auto; background: var(--card); border: 1px solid var(--border); border-radius: 12px; }
table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
th, td { padding: 10px 12px; border-bottom: 1px solid var(--border); white-space: nowrap; font-size: 14px; }
th { font-weight: 500; color: var(--muted); text-align: left; background: var(--card); }
tbody tr { cursor: pointer; } tbody tr:hover { background: color-mix(in srgb, var(--accent) 6%, transparent); }
tfoot td { font-weight: 600; }

.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px; }
.card h3 { margin: 0 0 12px; font-size: 15px; }
.card.wide { grid-column: 1 / -1; }
.grid canvas { max-height: 320px; }
.grid.three { grid-template-columns: repeat(3, 1fr); }
.wide-input { width: min(460px, 100%); }
.warn { color: #c27803; }
.trade-form { margin-top: 12px; }
.trade-form .fields, .card .trade-form:not(#addForm) { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 8px; }
.trade-form[hidden] { display: none !important; }
#addForm { margin: 0 0 12px; }
#addForm h3 { margin: 0 0 10px; }
.field { display: flex; flex-direction: column; gap: 3px; font-size: 12px; color: var(--muted); }
.field input { width: 100%; }
.trade-foot { grid-column: 1 / -1; display: flex; align-items: center; justify-content: flex-end; gap: 12px; margin-top: 8px; }
.trade-summary { color: var(--text); font-variant-numeric: tabular-nums; }
.card h4 { margin: 14px 0 6px; font-size: 14px; }
.inline-form { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 12px; }
.inline-form input { flex: 1 1 110px; min-width: 0; }
.inline-form[hidden] { display: none; }
.table-wrap.flat { border: 0; border-radius: 0; }
.table-wrap.scroll { max-height: 280px; overflow-y: auto; }
.date-input { width: 140px; padding: 4px 6px; font-size: 13px; }
.stack { display: flex; flex-direction: column; gap: 8px; margin-bottom: 8px; }
.stack input { width: 100%; }
.tag { display: inline-block; font-size: 11px; padding: 1px 6px; border-radius: 4px; margin-right: 6px; vertical-align: 1px; background: color-mix(in srgb, var(--muted) 18%, transparent); color: var(--muted); }
.tag-ETF { background: color-mix(in srgb, var(--accent) 15%, transparent); color: var(--accent); }
.tag-基金 { background: color-mix(in srgb, #f59e0b 18%, transparent); color: #c27803; }

.stock-head { display: flex; align-items: baseline; gap: 16px; flex-wrap: wrap; margin-bottom: 16px; }
.stock-head .price { font-size: 34px; font-weight: 700; }
.stock-head h2 { margin: 0; }
.ranges { display: flex; gap: 4px; margin-bottom: 8px; }
.ranges button { padding: 4px 10px; background: var(--card); color: var(--muted); border-color: var(--border); }
.ranges button.active { color: var(--accent); border-color: var(--accent); }
dl.info { display: grid; grid-template-columns: max-content 1fr; gap: 6px 16px; margin: 0; font-size: 14px; }
dl.info dt { color: var(--muted); }
dl.info dd { margin: 0; }

#auth { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
#auth[hidden], #app[hidden] { display: none; }
.auth-card { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 28px; width: 100%; max-width: 360px; display: flex; flex-direction: column; gap: 12px; }
.auth-card h1 { text-align: center; margin-bottom: 4px; }
.auth-card input { width: 100%; padding: 10px 12px; font-size: 15px; }
.auth-card input[hidden] { display: none; }
.auth-card #authSubmit { padding: 10px; font-size: 15px; }
.auth-tabs { display: flex; gap: 4px; }
.auth-tabs button { flex: 1; background: none; color: var(--muted); border-color: var(--border); }
.auth-tabs button.active { color: var(--accent); border-color: var(--accent); }
.error { color: var(--up); font-size: 13px; margin: 0; min-height: 1em; }

@media (max-width: 760px) { .grid, .grid.three { grid-template-columns: 1fr; } header { gap: 12px; padding: 12px 16px; } #updated { margin-left: 0; } }
@media print {
  header nav, .toolbar, #updated, #who, #logoutBtn { display: none; }
  body { background: #fff; }
  .tab { display: none !important; } #tab-report { display: block !important; }
}