*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Microsoft JhengHei", sans-serif;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  min-height: 100dvh;
}
h1, h2, h3, p { margin: 0; }
button { font: inherit; }
input { font: inherit; }
ul { list-style: none; margin: 0; padding: 0; }
a { color: inherit; }

:root {
  --bg: #000000;
  --surface: #121214;
  --surface-2: #1c1c1f;
  --border: #2a2a2e;
  --fg: #f2f2f3;
  --muted: #8a8a8f;
  --accent: #3a8dff;
  --up: #eb5757;   /* 台股慣例：紅漲 */
  --down: #2ecc71; /* 台股慣例：綠跌 */
  --danger: #eb5757;
  --radius: 14px;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}