:root {
  color-scheme: dark;
  --bg: #0b0f1a;
  --bg-secondary: #101826;
  --card: rgba(18, 26, 38, 0.72);
  --card-strong: rgba(20, 30, 46, 0.88);
  --border: rgba(148, 163, 184, 0.18);
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --accent-strong: #22d3ee;
  --success: #4ade80;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Inter", system-ui, sans-serif;
  background: radial-gradient(circle at top, rgba(56, 189, 248, 0.15), transparent 45%),
    radial-gradient(circle at 15% 20%, rgba(34, 211, 238, 0.12), transparent 40%),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover,
a:focus {
  color: var(--accent-strong);
}

.shell {
  width: min(1100px, 92vw);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(10, 15, 25, 0.85);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 20px 0 16px;
}

.logo img {
  height: 52px;
  filter: drop-shadow(0 0 12px rgba(56, 189, 248, 0.35));
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 16px;
  font-size: 0.95rem;
  color: var(--muted);
}

.site-nav a {
  color: inherit;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.55);
  border: 1px solid transparent;
  transition: all 0.2s ease;
}

.site-nav a:hover,
.site-nav a:focus {
  color: var(--text);
  border-color: rgba(56, 189, 248, 0.35);
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.2);
}

.content {
  padding: 28px 0 36px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 20px;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(16px);
}

.card + .card {
  margin-top: 24px;
}

.page-title {
  margin: 12px 0 18px;
  font-size: clamp(1.6rem, 2.2vw, 2.4rem);
  letter-spacing: 0.04em;
}

.section-title {
  margin-top: 0;
  font-size: 1.2rem;
}

.table-card {
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 560px;
}

.data-table th,
.data-table td {
  padding: 12px 14px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
  text-align: left;
}

.data-table th {
  color: var(--muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.data-table tbody tr {
  transition: background 0.2s ease;
}

.data-table tbody tr:hover {
  background: rgba(56, 189, 248, 0.08);
}

.chart-panel {
  width: 100%;
  margin-top: 12px;
}

.chart-panel canvas {
  width: 100% !important;
  height: auto !important;
}

.chart-error {
  margin-top: 12px;
  color: #fca5a5;
  font-size: 0.95rem;
}

.analysis-comment {
  color: var(--text);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  color: var(--accent);
}

.ad-banner {
  margin: 18px 0;
  padding: 12px;
  border-radius: 18px;
  background: var(--card-strong);
  border: 1px solid rgba(148, 163, 184, 0.12);
  overflow: hidden;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0 32px;
  color: var(--muted);
  background: rgba(10, 15, 25, 0.85);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px 18px;
  margin-bottom: 12px;
}

.footer-links a {
  color: inherit;
}

@media (min-width: 900px) {
  .shell {
    width: min(1200px, 88vw);
  }

  .header-inner {
    flex-direction: row;
    justify-content: space-between;
  }

  .content {
    padding: 42px 0 56px;
  }

  .card {
    padding: 28px 30px;
  }

  .chart-panel {
    margin-top: 20px;
  }
}