:root {
  --primary: #2563eb;
  --bg: #f8fafc;
  --text: #0f172a;
  --muted: #64748b;
  --card: #ffffff;
  --border: #e5e7eb;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, "Noto Sans JP", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  background-color: var(--bg);
  color: var(--text);
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
}

/* ===== Header ===== */
header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
}

nav ul {
  display: flex;
  gap: 16px;
  list-style: none;
  padding: 0;
  margin: 0;
}

nav a {
  font-size: 0.95rem;
  color: var(--muted);
}

nav a:hover {
  color: var(--primary);
}

/* ===== Hero ===== */
.hero {
  padding: 48px 0 32px;
}

.hero h1 {
  font-size: 2rem;
  margin-bottom: 8px;
}

.hero p {
  color: var(--muted);
  max-width: 720px;
}

.search-box {
  margin-top: 24px;
  display: flex;
  gap: 8px;
  max-width: 600px;
}

.search-box input {
  flex: 1;
  padding: 12px 14px;
  font-size: 1rem;
  border: 1px solid var(--border);
  border-radius: 6px;
}

.search-box button {
  padding: 12px 20px;
  font-size: 1rem;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

/* ===== Cards ===== */
.section-title {
  margin: 40px 0 16px;
  font-size: 1.25rem;
  font-weight: 600;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
}

.card h3 {
  font-size: 1rem;
  margin: 0 0 8px;
}

.card .site {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 12px;
}

.card .point {
  font-size: 1.2rem;
  font-weight: 700;
}

.card .change {
  font-size: 0.9rem;
}

.card .change.plus {
  color: #16a34a;
}

.card .change.minus {
  color: #dc2626;
}

/* ===== Footer ===== */
footer {
  background: var(--card);
  border-top: 1px solid var(--border);
  padding: 24px 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 8px;
}



/* クリック可能なUI */
.search-results {
  margin-top: 20px;
}

.search-result-item {
  padding: 12px;
  border-bottom: 1px solid #ddd;
  cursor: pointer;
}

.search-result-item:hover {
  background-color: #f5f5f5;
}
/* クリック可能なUI */

.summary {
  display: flex;
  gap: 20px;
  margin: 15px 0 25px;
  font-weight: bold;
}

.history-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 30px;
}

.history-table th,
.history-table td {
  border: 1px solid #ccc;
  padding: 8px;
  text-align: center;
}

.diff.plus {
  color: #d32f2f;   /* 増加：赤 */
}

.diff.minus {
  color: #1976d2;   /* 減少：青 */
}

.diff.zero {
  color: #666;
}

/* 期間絞り込み */
.period-filter {
  display: flex;
  gap: 8px;
  margin: 20px 0;
}

.period-filter button {
  padding: 6px 12px;
  border: 1px solid #ccc;
  background: #fff;
  cursor: pointer;
  border-radius: 4px;
}

.period-filter button.active {
  background: #2b7cff;
  color: #fff;
  border-color: #2b7cff;
}

/* ヘッダーjs */
.search-box {
  position: relative;
  overflow: visible;
}

.suggest-list {
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  background: #fff;
  border: 1px solid #ddd;
  border-top: none;
  list-style: none;
  margin: 0;
  padding: 0;
  z-index: 1000;
}

.suggest-list li {
  padding: 8px 10px;
  cursor: pointer;
}

.suggest-list li:hover {
  background: #f5f5f5;
}


@media (min-width: 768px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
  }
}