/* ============================================================
   NEXUS.GG — Layout
   App shell · Header · Nav · Grids · Footer · Page helpers
   ============================================================ */

/* ── App shell ────────────────────────────────────────────── */
.app-shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  /* Ambient gold radial glow at top — luxury depth cue */
  background-image: radial-gradient(ellipse 80% 40% at 50% 0%, rgba(184,149,44,0.055) 0%, transparent 70%);
  background-attachment: fixed;
}
[data-theme="light"] .app-shell {
  background-image: radial-gradient(ellipse 80% 40% at 50% 0%, rgba(138,109,26,0.045) 0%, transparent 70%);
}

.page-content {
  flex: 1;
  padding: calc(var(--space)*3) calc(var(--space)*3.5);
  max-width: 1440px;
  width: 100%;
  margin: 0 auto;
}

/* ── Site header ──────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-overlay);
  background: var(--header-bg);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border-bottom: 1px solid var(--border-subtle);
  box-shadow: 0 1px 0 0 var(--gold-border); /* subtle gold shimmer under header */
  transition: background var(--transition-slow), border-color var(--transition-slow);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 calc(var(--space)*3.5);
  height: 54px;
}

/* ── Logo ─────────────────────────────────────────────────── */
.site-logo {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none; flex-shrink: 0;
}
.logo-mark {
  width: 32px; height: 32px;
  border: 2px solid var(--gold);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; color: var(--gold);
  transition: background var(--transition), box-shadow var(--transition);
}
.site-logo:hover .logo-mark { background: var(--gold-subtle); box-shadow: var(--shadow-gold); }
.logo-text {
  font-family: 'Cinzel', serif; font-size: 1.0625rem;
  font-weight: 700; color: var(--gold); letter-spacing: 0.08em;
}

/* ── Nav tabs ─────────────────────────────────────────────── */
.site-nav {
  display: flex; align-items: center; gap: 2px;
  flex: 1; justify-content: center;
  padding: 0 calc(var(--space)*2);
}
.nav-tab {
  display: flex; align-items: center; gap: 6px;
  padding: 0 16px; height: 54px;
  font-family: 'Syne', sans-serif;
  font-size: 0.6875rem; font-weight: 600;
  letter-spacing: 0.10em; text-transform: uppercase;
  color: var(--text-faint);
  border: none; border-bottom: 2px solid transparent;
  background: none; white-space: nowrap;
  transition: color var(--transition), border-color var(--transition);
}
.nav-tab:hover   { color: var(--text-secondary); }
.nav-tab.is-active { color: var(--gold); border-bottom-color: var(--gold); }
.nav-tab .tab-icon { font-size: 13px; line-height: 1; }

.live-indicator {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent-live); flex-shrink: 0;
}

/* ── Header controls ──────────────────────────────────────── */
.header-controls { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }

.api-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.625rem; color: var(--gold-dim);
  background: var(--gold-subtle); border: 1px solid var(--gold-border);
  border-radius: var(--radius-pill); padding: 3px 10px;
  letter-spacing: 0.05em; white-space: nowrap;
}

.app-like-trigger {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--bg-elevated); border: 1px solid var(--gold-border);
  border-radius: var(--radius-pill); padding: 2px 10px;
  font-weight: 600; font-size: 0.75rem; color: var(--text-muted);
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease, transform 0.15s ease;
}

.app-like-trigger:hover:not(:disabled) {
  color: var(--accent-live); border-color: var(--accent-live);
  background: var(--gold-glow); transform: scale(1.05);
}

.app-like-trigger.liked {
  color: var(--gold-bright); border-color: var(--gold-bright);
  background: var(--gold-glow); cursor: not-allowed;
}

.app-like-trigger:disabled:not(.liked) { opacity: 0.6; cursor: not-allowed; }

.theme-toggle {
  display: flex; align-items: center; gap: 6px;
  padding: 5px 12px;
  font-family: 'Syne', sans-serif; font-size: 0.6875rem; font-weight: 600;
  letter-spacing: 0.06em; color: var(--text-muted);
  background: transparent; border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill);
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.theme-toggle:hover {
  color: var(--text-secondary); border-color: var(--border-default); background: var(--bg-raised);
}
.theme-toggle .toggle-icon { font-size: 12px; }

/* ── Tab panels ───────────────────────────────────────────── */
.tab-panel          { display: none; }
.tab-panel.is-active { display: block; animation: fadeIn 0.22s ease both; }

/* ── Page sections ────────────────────────────────────────── */
.section        { margin-bottom: calc(var(--space)*3); }
.section-flush  { margin-bottom: 0; }

.section-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: calc(var(--space)*1.5);
}
.section-title {
  font-family: 'Cinzel', serif; font-size: 0.6875rem; font-weight: 600;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-muted);
  display: flex; align-items: center; gap: 8px;
}
.section-title::before {
  content: ''; display: inline-block;
  width: 3px; height: 13px; background: var(--gold);
  border-radius: 2px; flex-shrink: 0;
}
.section-meta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6875rem; color: var(--text-faint);
}

/* ── Page hero ────────────────────────────────────────────── */
.page-hero {
  margin-bottom: calc(var(--space)*3);
  padding-bottom: calc(var(--space)*2.5);
  border-bottom: 1px solid var(--border-subtle);
  position: relative;
}
/* Gold shimmer along the bottom rule */
.page-hero::after {
  content: ''; position: absolute;
  bottom: -1px; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--gold-border) 30%, var(--gold-dim) 50%, var(--gold-border) 70%, transparent 100%);
}
.page-hero-title {
  font-family: 'Cinzel', serif; font-size: 1.25rem; font-weight: 700;
  color: var(--text-primary); letter-spacing: 0.06em; margin-bottom: 4px;
}
.page-hero-sub {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6875rem; color: var(--text-faint); letter-spacing: 0.05em;
}

/* ── Grid layouts ─────────────────────────────────────────── */
.grid-4   { display: grid; grid-template-columns: repeat(4,1fr); gap: calc(var(--space)*1.5); }
.grid-3   { display: grid; grid-template-columns: repeat(3,1fr); gap: calc(var(--space)*1.5); }
.grid-2   { display: grid; grid-template-columns: repeat(2,1fr); gap: calc(var(--space)*1.5); }
.grid-2-1 { display: grid; grid-template-columns: 2fr 1fr;       gap: calc(var(--space)*1.5); }
.grid-1-2 { display: grid; grid-template-columns: 1fr 2fr;       gap: calc(var(--space)*1.5); }

.grid-align-start { align-items: start; }
.grid-span-all    { grid-column: 1 / -1; }

/* ── Stack column ─────────────────────────────────────────── */
.stack-col { display: flex; flex-direction: column; gap: calc(var(--space)*2.5); }

/* ── Controls bar ─────────────────────────────────────────── */
.controls-bar       { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.controls-bar-right { margin-left: auto; display: flex; align-items: center; gap: 8px; }

/* ── Info banner ──────────────────────────────────────────── */
.info-banner {
  display: flex; align-items: flex-start; gap: 12px;
  padding: calc(var(--space)*1.5) calc(var(--space)*2);
  margin-bottom: calc(var(--space)*3);
  background: var(--gold-subtle);
  border: 1px solid var(--gold-border);
  border-left: 3px solid var(--gold-dim);
  border-radius: var(--radius-md);
}
.info-banner-icon { font-size: 1.1rem; flex-shrink: 0; margin-top: 1px; }
.info-banner-text { font-size: 0.8125rem; color: var(--text-secondary); line-height: 1.55; }

/* ── Pagination row ───────────────────────────────────────── */
.pagination-row {
  display: flex; gap: 6px; justify-content: center;
  margin-top: calc(var(--space)*1.5); flex-wrap: wrap;
}

/* ── Sidebar card ─────────────────────────────────────────── */
.sidebar-card        { padding: calc(var(--space)*2); }
.sidebar-card-header { margin-bottom: calc(var(--space)*1.5); }

/* ── Game colour key ──────────────────────────────────────── */
.game-key-list  { display: flex; flex-direction: column; gap: 10px; }
.game-key-item  { display: flex; align-items: center; gap: 10px; }
.game-key-dot   { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
.game-key-label { font-size: 0.8125rem; color: var(--text-secondary); }

/* ── Spotlight card ───────────────────────────────────────── */
.spotlight-card { padding: calc(var(--space)*2); min-height: 200px; }

/* ── Gold gradient rule ───────────────────────────────────── */
.gold-rule {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-dim), transparent);
  border: none;
  margin: calc(var(--space)*2.5) 0;
}

/* ── Vertical divider ─────────────────────────────────────── */
.v-divider { width: 1px; height: 24px; background: var(--border-subtle); flex-shrink: 0; }

/* ── Site footer ──────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-raised);
  padding: calc(var(--space)*1.5) calc(var(--space)*3.5);
  display: flex; align-items: center; justify-content: space-between;
  transition: background var(--transition-slow);
}
.footer-left { font-family: 'JetBrains Mono', monospace; font-size: 0.625rem; color: var(--text-faint); letter-spacing: 0.04em; }
.footer-links { display: flex; align-items: center; gap: 20px; }
.footer-links a { font-family: 'JetBrains Mono', monospace; font-size: 0.625rem; color: var(--text-faint); transition: color var(--transition); }
.footer-links a:hover { color: var(--text-muted); }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 1100px) { .grid-4 { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 860px) {
  .site-nav { gap: 0; }
  .nav-tab  { padding: 0 10px; font-size: 0.625rem; }
  .nav-tab .tab-icon { display: none; }
  .grid-2-1, .grid-1-2 { grid-template-columns: 1fr; }
  .api-badge { display: none; }
  .controls-bar-right { margin-left: 0; }
}
@media (max-width: 640px) {
  .page-content { padding: calc(var(--space)*2); }
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .logo-text { display: none; }
  .page-hero-title { font-size: 1rem; }
  .sidebar-card { padding: calc(var(--space)*1.5); }
}