:root {
  --bg: #f4f5f7;
  --card-bg: #ffffff;
  --text: #1c2024;
  --text-dim: #6b7280;
  --border: #e3e5e8;
  --up: #12805c;
  --up-bg: #e5f4ee;
  --down: #c62f42;
  --down-bg: #fdeaec;
  --flat: #6b7280;
  --accent: #2f6fed;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181c;
    --card-bg: #21242a;
    --text: #e8eaed;
    --text-dim: #9aa1ab;
    --border: #333842;
    --up: #3ecf8e;
    --up-bg: #16362b;
    --down: #ff6b7d;
    --down-bg: #3a2126;
    --flat: #9aa1ab;
    --accent: #6ea0ff;
  }
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html {
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
}

body {
  margin: 0;
  max-width: 100%;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic UI",
    "Segoe UI", "Noto Sans JP", system-ui, sans-serif;
  line-height: 1.6;
  -webkit-tap-highlight-color: transparent;
}

.wrap {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding-top: calc(16px + env(safe-area-inset-top));
  padding-bottom: calc(32px + env(safe-area-inset-bottom));
  padding-left: calc(16px + env(safe-area-inset-left));
  padding-right: calc(16px + env(safe-area-inset-right));
}

.fund-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}

.fund-tabs button {
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--text-dim);
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 0.9rem;
  cursor: pointer;
}

.fund-tabs button.active {
  border-color: var(--accent);
  color: #fff;
  background: var(--accent);
  font-weight: 700;
}

.page-head h1 {
  font-size: 1.15rem;
  margin: 0 0 4px;
  line-height: 1.4;
}

.sub {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.88rem;
}

.badge {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 8px;
  border-radius: 999px;
  background: var(--up-bg);
  color: var(--up);
  font-size: 0.76rem;
  font-weight: 700;
}

.alert {
  margin: 14px 0 0;
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--down-bg);
  color: var(--down);
  font-size: 0.85rem;
  font-weight: 600;
}

.cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 16px;
}

@media (min-width: 640px) {
  .cards { grid-template-columns: repeat(3, 1fr); }
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px 16px;
}

.card h2 {
  margin: 0 0 8px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-dim);
  letter-spacing: 0.02em;
}

.card .big {
  margin: 0;
  font-size: 1.6rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.card .pct {
  margin: 2px 0 0;
  font-size: 1rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.card-note {
  margin: 8px 0 0;
  font-size: 0.8rem;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
}

.card-warn { color: var(--down); }

.card--latest .big { color: var(--text); }

.is-up { color: var(--up); }
.is-down { color: var(--down); }
.is-flat { color: var(--flat); }

.card.is-up { border-color: color-mix(in srgb, var(--up) 45%, var(--border)); background: var(--up-bg); }
.card.is-down { border-color: color-mix(in srgb, var(--down) 45%, var(--border)); background: var(--down-bg); }

.chart-box {
  margin-top: 18px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px 14px 12px;
}

.chart-head {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.chart-head h2 { margin: 0; font-size: 0.92rem; }

.range-btns { display: flex; gap: 4px; }

.range-btns button {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-dim);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 0.8rem;
  cursor: pointer;
}

.range-btns button.active {
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 700;
}

.chart-canvas-wrap {
  position: relative;
  width: 100%;
  max-width: 100%;
  height: 300px;
  overflow: hidden;
}

.chart-canvas-wrap canvas {
  max-width: 100% !important;
}

@media (max-width: 480px) {
  .chart-canvas-wrap { height: 240px; }
}

.page-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 8px;
  margin-top: 18px;
  font-size: 0.78rem;
  color: var(--text-dim);
}

.page-foot .dot { opacity: 0.5; }

#refresh-btn {
  margin-left: auto;
  border: 1px solid var(--accent);
  background: transparent;
  color: var(--accent);
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 0.82rem;
  cursor: pointer;
  font-weight: 700;
}

#refresh-btn:disabled { opacity: 0.5; cursor: progress; }