:root {
  --bg: #0b0f17;
  --surface: #111826;
  --surface-2: #161f30;
  --border: #232f45;
  --text: #e6edf6;
  --text-muted: #97a3b6;
  --text-faint: #64708a;
  --accent: #4ade80;
  --success: #4ade80;
  --error: #f87171;
  --c1: #4ade80; --c2: #38bdf8; --c3: #a78bfa; --c4: #fbbf24;
  --c5: #fb7185; --c6: #2dd4bf; --c7: #f472b6; --c8: #a3e635;
  --radius: 14px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "PingFang HK",
          "Microsoft JhengHei", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-variant-numeric: tabular-nums lining-nums;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.hidden { display: none !important; }

/* ---------- Topbar ---------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
  background: rgba(11,15,23,.82); backdrop-filter: blur(10px);
}
.brand { display: flex; align-items: center; gap: 12px; font-weight: 650; font-size: 17px; letter-spacing: .2px; }
.topbar-right { display: flex; align-items: center; gap: 14px; }
.updated { color: var(--text-faint); font-size: 13px; }
.btn-refresh {
  background: var(--surface-2); border: 1px solid var(--border); color: var(--text);
  width: 34px; height: 34px; border-radius: 9px; cursor: pointer; font-size: 16px;
  transition: .15s;
}
.btn-refresh:hover { background: var(--border); transform: rotate(90deg); }

/* ---------- App ---------- */
.app { max-width: 1240px; margin: 0 auto; padding: 24px; }

.loading { display: flex; flex-direction: column; align-items: center; gap: 16px; padding: 100px 0; color: var(--text-muted); }
.spinner { width: 38px; height: 38px; border: 3px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.error { background: rgba(248,113,113,.1); border: 1px solid rgba(248,113,113,.35); color: #fecaca; padding: 20px; border-radius: var(--radius); }

/* ---------- KPI ---------- */
.kpi-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 20px; }
.kpi-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.kpi-label { color: var(--text-muted); font-size: 13px; margin-bottom: 10px; }
.kpi-value { font-size: 28px; font-weight: 700; letter-spacing: -.5px; }
.kpi-sub { color: var(--text-faint); font-size: 13px; margin-top: 6px; }
.pos { color: var(--success); }
.neg { color: var(--error); }

/* ---------- Grid / cards ---------- */
.grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-bottom: 20px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.grid .card:first-child { grid-column: 1 / -1; }
.card-title { font-size: 15px; font-weight: 620; margin-bottom: 16px; }
.card-head { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px; margin-bottom: 8px; }
.card-head .card-title { margin-bottom: 0; }

.chart-wrap { position: relative; height: 240px; }
.chart-wrap.chart-tall { height: 300px; }

/* ---------- Filters ---------- */
.filters { display: flex; gap: 8px; flex-wrap: wrap; }
.filter-chip {
  background: var(--surface-2); border: 1px solid var(--border); color: var(--text-muted);
  padding: 5px 12px; border-radius: 999px; font-size: 13px; cursor: pointer; transition: .15s;
}
.filter-chip:hover { color: var(--text); }
.filter-chip.active { background: var(--accent); border-color: var(--accent); color: #05230f; font-weight: 600; }

/* ---------- Table ---------- */
.table-wrap { overflow-x: auto; margin-top: 12px; }
table.holdings { width: 100%; border-collapse: collapse; font-size: 14px; }
.holdings th { text-align: left; color: var(--text-muted); font-weight: 550; padding: 10px 12px; border-bottom: 1px solid var(--border); white-space: nowrap; font-size: 13px; }
.holdings td { padding: 11px 12px; border-bottom: 1px solid rgba(35,47,69,.5); white-space: nowrap; }
.holdings tr:hover td { background: var(--surface-2); }
.holdings .num { text-align: right; }
.badge { display: inline-block; padding: 2px 9px; border-radius: 6px; font-size: 12px; background: var(--surface-2); color: var(--text-muted); border: 1px solid var(--border); }

.warnings { margin-top: 18px; background: rgba(251,191,36,.08); border: 1px solid rgba(251,191,36,.3); color: #fde68a; padding: 14px 18px; border-radius: var(--radius); font-size: 14px; }
.warnings ul { margin-left: 18px; }

.foot { text-align: center; color: var(--text-faint); font-size: 13px; padding: 30px 0 40px; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .kpi-row { grid-template-columns: repeat(2, 1fr); }
  .grid { grid-template-columns: 1fr; }
  .app { padding: 16px; }
}
@media (max-width: 480px) {
  .kpi-row { grid-template-columns: 1fr; }
  .kpi-value { font-size: 24px; }
}

/* 預覽版示範橫幅 */
.demo-banner {
  background: linear-gradient(90deg, rgba(74,222,128,.14), rgba(56,189,248,.14));
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 13px;
  text-align: center;
  padding: 9px 16px;
}