/* =============================================
   Strange Music Page - Global Styles
   ============================================= */

:root {
  --color-bg: #ffffff;
  --color-bg-card: #f8fafc;
  --color-bg-card-hover: #f1f5f9;
  --color-border: #e2e8f0;
  --color-text: #003366;
  --color-text-muted: #64748b;
  --color-text-heading: #002244;
  --color-accent: #006666;
  --color-accent-hover: #008888;
  --color-accent-subtle: rgba(0, 102, 102, 0.05);
  --color-tag-bg: #edf2f7;
  --color-tag-text: #4a5568;
  --font-body: sans-serif;
  --font-mono: monospace;
  --max-width: 800px;
  --radius: 8px;
  --transition: 0.2s ease;
}

/* Reset & Base */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 15px;
  scroll-behavior: smooth;
  overflow-y: scroll; /* Always show scrollbar to prevent layout shift */
}

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

img {
  max-width: 100%;
  height: auto;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* Fixed container width on desktop to prevent shifting between pages */
@media (min-width: 800px) {
  .container {
    width: var(--max-width);
  }
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  z-index: 100;
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.site-title {
  display: flex;
  flex-direction: column;
  text-decoration: none;
}

.site-title-main {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text-heading);
  letter-spacing: 0.05em;
}

.site-title-sub {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  gap: 1.25rem;
  font-size: 0.85rem;
}

.site-nav a {
  color: var(--color-text-muted);
  padding: 0.25rem 0;
  border-bottom: 2px solid transparent;
  transition: all var(--transition);
}

.site-nav a:hover {
  color: var(--color-text);
  border-bottom-color: var(--color-accent);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 0;
  margin-top: auto;
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* Main content */
main.container {
  padding-top: 2rem;
  padding-bottom: 3rem;
  flex: 1;
}

/* Page Title */
.page-title {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-text-heading);
  margin-bottom: 0.5rem;
}

.page-subtitle {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

/* Report Card */
.report-card {
  display: block;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: 0.75rem;
  transition: all var(--transition);
  text-decoration: none;
}

.report-card:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-accent);
  transform: translateX(4px);
}

.report-card-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 0.25rem;
}

.report-card-title {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text-heading);
  margin-bottom: 0.35rem;
}

.report-card-venue {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.report-card-venue::before {
  content: '📍 ';
}

/* Tags / Chips */
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
}

.tag-link {
  display: inline-block;
  background: var(--color-tag-bg);
  color: var(--color-tag-text);
  padding: 0.3rem 0.75rem;
  border-radius: 100px;
  font-size: 0.8rem;
  transition: all var(--transition);
  border: 1px solid transparent;
}

.tag-link:hover {
  background: var(--color-accent-subtle);
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.tag-count {
  font-size: 0.7rem;
  opacity: 0.6;
  margin-left: 0.25rem;
}

/* Year Grid */
.year-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.year-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem 0.5rem;
  transition: all var(--transition);
  text-decoration: none;
}

.year-card:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.year-card-year {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text-heading);
}

.year-card-count {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

/* Report Detail Page */
.report-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.report-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.report-meta-item {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.report-body {
  line-height: 1.85;
  font-size: 0.95rem;
}

.report-body h2 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text-heading);
  margin: 2rem 0 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--color-border);
}

.report-body h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-accent);
  margin: 1.5rem 0 0.5rem;
}

.report-body p {
  margin-bottom: 1rem;
}

.report-body ul {
  margin: 1rem 0 1rem 1.5rem;
  list-style: none;
}

.report-body ol {
  margin: 1rem 0 1rem 1.5rem;
  list-style: decimal;
}

.report-body li {
  margin-bottom: 0.15rem;
}

.report-body li p {
  margin-bottom: 0;
  display: inline; /* pタグをインライン化して余分な改行を防ぐ */
}

/* Section heading */
.section-heading {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text-heading);
  margin: 2rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
}

/* Search */
.search-container {
  margin-bottom: 2rem;
}

/* Stats */
.stats-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  margin-bottom: 2rem;
  padding: 1rem 1.25rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent);
}

.stat-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* Back link */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

.back-link:hover {
  color: var(--color-accent);
}

/* Responsive */
@media (max-width: 640px) {
  html {
    font-size: 14px;
  }

  .site-header .container {
    flex-direction: column;
    align-items: flex-start;
  }

  .page-title {
    font-size: 1.4rem;
  }
  .year-grid {
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  }
}