/* ===================================================
   不動産レポート図鑑 - styles.css
   テーマ: 白ベース・データジャーナリズム風（vdata.nikkei.com）
   =================================================== */

:root {
  --color-bg: #ffffff;
  --color-bg-secondary: #f8f9fa;
  --color-text: #1a1a1a;
  --color-text-secondary: #6b7280;
  --color-border: #e5e7eb;
  --color-accent: #1f6fcb;
  --color-accent-dark: #15539e;
  --color-new: #e63946;
  --color-pin: #f59e0b;
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-card-hover: 0 10px 25px rgba(0, 0, 0, 0.08), 0 4px 10px rgba(0, 0, 0, 0.04);
  --radius-card: 8px;
  --radius-badge: 4px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ===== ヘッダー ===== */
.site-header {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: 1.25rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
  background-color: rgba(255, 255, 255, 0.92);
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 0.875rem;
}

.logo-icon {
  font-size: 2rem;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
}

.logo-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.site-title {
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-text);
}

.site-subtitle {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  letter-spacing: 0.02em;
  margin-top: 2px;
}

.header-meta {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

/* ===== メイン ===== */
.main-content {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

.intro {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.intro-text {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  max-width: 720px;
  margin-bottom: 0.875rem;
}

.stats {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.stats strong {
  color: var(--color-accent);
  font-weight: 700;
  font-size: 1.125rem;
  font-variant-numeric: tabular-nums;
}

.stat-divider {
  color: var(--color-border);
}

/* ===== カードグリッド ===== */
.report-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.report-card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  position: relative;
}

.report-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
}

.report-card:hover .card-overlay {
  opacity: 1;
}

/* サムネイル */
.card-thumbnail {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--thumb-color, #1f6fcb), color-mix(in srgb, var(--thumb-color, #1f6fcb) 60%, white));
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.card-thumbnail.has-image {
  background: var(--color-bg-secondary);
}

.card-thumbnail-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.card-thumbnail-text {
  color: white;
  font-size: 0.875rem;
  font-weight: 500;
  text-align: center;
  padding: 1rem;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
  opacity: 0.85;
}

/* バッジ */
.card-badges {
  position: absolute;
  top: 0.625rem;
  left: 0.625rem;
  display: flex;
  gap: 0.375rem;
  z-index: 2;
}

.badge {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  font-size: 0.6875rem;
  font-weight: 700;
  border-radius: var(--radius-badge);
  letter-spacing: 0.04em;
  color: white;
  text-transform: uppercase;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
}

.badge-new { background-color: var(--color-new); }
.badge-pin { background-color: var(--color-pin); }

/* オーバーレイ（ホバー時に目的を表示） */
.card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.85) 0%, rgba(0, 0, 0, 0.4) 60%, transparent 100%);
  color: white;
  padding: 1rem;
  display: flex;
  align-items: flex-end;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.card-overlay-text {
  font-size: 0.8125rem;
  line-height: 1.5;
  font-weight: 500;
}

.card-overlay-label {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 700;
  background-color: rgba(255, 255, 255, 0.2);
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius-badge);
  margin-bottom: 0.375rem;
  letter-spacing: 0.05em;
}

/* カード本体 */
.card-body {
  padding: 1rem 1.125rem 1.125rem;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 0.5rem;
}

.card-title {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-text);
}

.card-description {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 0.625rem;
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

.card-date {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-variant-numeric: tabular-nums;
}

.card-no {
  font-size: 0.6875rem;
  color: var(--color-text-secondary);
  background-color: var(--color-bg-secondary);
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-badge);
  font-variant-numeric: tabular-nums;
}

/* ===== フッタ ===== */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 1.5rem;
  text-align: center;
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  background-color: var(--color-bg-secondary);
}

/* ===== レスポンシブ ===== */
@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .site-title {
    font-size: 1.125rem;
  }

  .site-subtitle {
    font-size: 0.6875rem;
  }

  .header-meta {
    font-size: 0.75rem;
  }

  .main-content {
    padding: 1.5rem 1rem 3rem;
  }

  .report-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
}

@media (min-width: 1024px) {
  .report-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}