:root {
  color-scheme: light;
  --bg: #fff8f1;
  --bg-accent: #ffe8d6;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-strong: rgba(255, 255, 255, 0.94);
  --border: rgba(154, 52, 18, 0.12);
  --shadow: 0 24px 64px rgba(120, 53, 15, 0.12);
  --text: #2c1b12;
  --muted: #7c5a47;
  --accent: #c2410c;
  --accent-strong: #9a3412;
  --accent-soft: rgba(194, 65, 12, 0.1);
  --grid: rgba(154, 52, 18, 0.12);
  --success: #166534;
  --danger: #b91c1c;
  --font-sans:
    "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic",
    "YuGothic", "Noto Sans JP", "Meiryo", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--text);
  overflow-x: hidden;
  background:
    radial-gradient(circle at top left, rgba(255, 226, 203, 0.9), transparent 32%),
    radial-gradient(circle at top right, rgba(254, 215, 170, 0.76), transparent 28%),
    linear-gradient(180deg, var(--bg) 0%, #fffdf9 100%);
}

button,
input,
select,
textarea {
  font: inherit;
}

.app-shell {
  width: min(1120px, calc(100% - 24px));
  margin: 0 auto;
  padding: max(18px, env(safe-area-inset-top)) 0 max(24px, env(safe-area-inset-bottom));
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  padding: 10px 6px 20px;
}

.topbar > * {
  min-width: 0;
}

.topbar h1,
.graph-header h2 {
  margin: 0;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.eyebrow,
.section-label,
.graph-caption,
.helper-text,
.stat-unit {
  margin: 0;
  color: var(--muted);
}

.eyebrow,
.section-label {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status-badge {
  margin: 4px 0 0;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--surface-strong);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  font-size: 0.95rem;
  font-weight: 700;
}

.layout {
  display: grid;
  gap: 18px;
}

.site-footer {
  padding: 18px 8px 8px;
  text-align: center;
}

.footer-link {
  color: var(--accent-strong);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 700;
}

.footer-link:hover,
.footer-link:focus-visible {
  text-decoration: underline;
}

.card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 28px;
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
}

.card::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.8), transparent);
  pointer-events: none;
}

.hero {
  min-height: 48dvh;
  display: grid;
  align-content: space-between;
  gap: 18px;
  padding: clamp(20px, 3vw, 30px);
  background:
    linear-gradient(135deg, rgba(255, 237, 213, 0.86), rgba(255, 255, 255, 0.92)),
    var(--surface);
}

.hero-copy {
  display: grid;
  gap: 10px;
}

.metric-wrap {
  display: flex;
  align-items: flex-end;
  gap: 14px;
  flex-wrap: wrap;
}

.metric-value {
  margin: 0;
  line-height: 0.88;
  font-size: clamp(5.5rem, 18vw, 11rem);
  font-weight: 900;
  letter-spacing: -0.06em;
}

.metric-unit {
  margin: 0 0 18px;
  font-size: clamp(1.2rem, 2.6vw, 1.8rem);
  font-weight: 700;
  color: var(--accent-strong);
}

.action-row,
.graph-controls,
.stats-row {
  display: grid;
  gap: 12px;
}

.action-row {
  grid-template-columns: minmax(0, 1fr) auto;
}

.primary-button,
.ghost-button {
  min-height: 48px;
  border-radius: 18px;
  border: 1px solid transparent;
  padding: 0 18px;
  cursor: pointer;
  transition:
    transform 160ms ease,
    background-color 160ms ease,
    border-color 160ms ease,
    opacity 160ms ease;
}

.primary-button {
  color: #fffdf9;
  background: linear-gradient(135deg, var(--accent) 0%, #ea580c 100%);
  font-weight: 800;
}

.ghost-button {
  color: var(--accent-strong);
  background: rgba(255, 255, 255, 0.72);
  border-color: rgba(154, 52, 18, 0.16);
  font-weight: 700;
}

.primary-button:hover,
.ghost-button:hover {
  transform: translateY(-1px);
}

.primary-button:disabled,
.ghost-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.helper-text {
  font-size: 0.95rem;
  line-height: 1.5;
}

.support-note {
  margin: 0;
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(154, 52, 18, 0.06);
  color: var(--accent-strong);
  font-size: 0.9rem;
  line-height: 1.5;
}

.support-note:empty {
  display: none;
}

.stats-row {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.stat {
  padding: 20px;
}

.stat-value {
  margin: 12px 0 6px;
  font-size: clamp(2.4rem, 9vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.04em;
}

.graph {
  padding: 20px;
}

.notice {
  padding: 20px;
  background:
    linear-gradient(180deg, rgba(255, 247, 237, 0.94), rgba(255, 255, 255, 0.96)),
    var(--surface);
}

.notice h2 {
  margin: 8px 0 0;
  font-size: clamp(1.15rem, 2.2vw, 1.4rem);
}

.notice-list {
  margin: 16px 0 0;
  padding-left: 1.25rem;
  color: var(--muted);
  line-height: 1.7;
}

.notice-list li + li {
  margin-top: 10px;
}

.graph-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.graph-controls {
  grid-auto-flow: column;
}

.graph-controls .ghost-button {
  min-width: 56px;
}

.graph-canvas-wrap {
  position: relative;
  min-height: clamp(280px, 42vw, 420px);
  border-radius: 22px;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.72), rgba(255, 248, 241, 0.95)),
    var(--bg-accent);
  border: 1px solid rgba(154, 52, 18, 0.1);
}

.graph-canvas {
  display: block;
  width: 100%;
  height: clamp(280px, 42vw, 420px);
  touch-action: pan-y;
}

.graph-empty {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  text-align: center;
  color: var(--muted);
  font-weight: 700;
}

.graph-empty[data-hidden="true"] {
  display: none;
}

.graph-caption {
  margin-top: 12px;
  font-size: 0.92rem;
  line-height: 1.5;
}

.status-badge[data-tone="connected"] {
  color: var(--success);
}

.status-badge[data-tone="error"] {
  color: var(--danger);
}

.status-badge[data-tone="pending"] {
  color: var(--accent-strong);
}

@media (max-width: 720px) {
  .app-shell {
    width: calc(100% - 12px);
    padding-top: max(10px, env(safe-area-inset-top));
  }

  .topbar,
  .graph-header {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
  }

  .action-row {
    grid-template-columns: 1fr;
  }

  .hero,
  .stat,
  .graph,
  .notice {
    padding: 16px;
  }

  .hero {
    min-height: auto;
    gap: 14px;
  }

  .metric-wrap {
    gap: 10px;
    align-items: baseline;
  }

  .metric-value {
    font-size: clamp(4.25rem, 24vw, 7rem);
  }

  .metric-unit {
    margin-bottom: 6px;
    font-size: 1.1rem;
  }

  .stats-row {
    gap: 10px;
  }

  .stat-value {
    margin-top: 8px;
    font-size: clamp(1.9rem, 10vw, 2.8rem);
  }

  .graph-controls {
    width: 100%;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .graph-canvas-wrap {
    min-height: 240px;
  }

  .graph-canvas {
    height: 240px;
  }

  .graph-caption {
    font-size: 0.85rem;
  }
}