/* SlabLogic Explains - Design System & Stylesheet */
:root {
  --bg-main: #0c0e12;
  --bg-surface: #141820;
  --bg-card: #1b202c;
  --bg-card-hover: #222938;
  --border-subtle: #293144;
  --border-active: #3b4760;
  
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --accent-amber: #f59e0b;
  --accent-amber-glow: rgba(245, 158, 11, 0.2);
  --accent-cyan: #06b6d4;
  --accent-cyan-glow: rgba(6, 182, 212, 0.2);
  --accent-emerald: #10b981;
  --accent-purple: #a855f7;
  
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  --transition-fast: 0.15s ease;
  --transition-smooth: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: var(--font-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Sponsor Top Banner */
.sponsor-bar {
  background: linear-gradient(90deg, #181c26 0%, #1e2433 100%);
  border-bottom: 1px solid var(--border-subtle);
  padding: 10px 0;
  font-size: 0.85rem;
}

.sponsor-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.sponsor-tag {
  background: var(--accent-amber);
  color: #000;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  letter-spacing: 0.05em;
}

.sponsor-text {
  color: var(--text-secondary);
  flex: 1;
}

.sponsor-text strong {
  color: var(--text-primary);
}

.sponsor-link {
  color: var(--accent-amber);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition-fast);
}

.sponsor-link:hover {
  text-decoration: underline;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--border-subtle);
  padding: 20px 0;
  background: rgba(12, 14, 18, 0.85);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 40;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  font-size: 1.8rem;
}

.brand-parent {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--accent-cyan);
  font-weight: 700;
  letter-spacing: 0.1em;
  display: block;
}

.brand-title {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.cadence-badge {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.3);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: var(--radius-full);
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-secondary:hover {
  border-color: var(--border-active);
  background: var(--bg-card);
}

.btn-secondary.active {
  background: var(--accent-amber);
  color: #000;
  border-color: var(--accent-amber);
}

.btn-primary {
  background: var(--accent-amber);
  color: #000;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-weight: 700;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  transition: var(--transition-fast);
}

.btn-primary:hover {
  filter: brightness(1.1);
  box-shadow: 0 0 15px var(--accent-amber-glow);
}

/* Hero Section */
.hero-section {
  padding: 56px 0 40px;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-amber);
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.25);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
  letter-spacing: 0.08em;
}

.hero-heading {
  font-size: 2.8rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  max-width: 840px;
  margin: 0 auto 16px;
  line-height: 1.15;
}

.hero-subtext {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 36px;
}

/* Countdown Card */
.countdown-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  max-width: 680px;
  margin: 0 auto;
  padding: 20px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.countdown-info {
  text-align: left;
  flex: 1;
  min-width: 240px;
}

.pulse-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--accent-emerald);
  border-radius: 50%;
  margin-right: 8px;
  box-shadow: 0 0 8px var(--accent-emerald);
}

.countdown-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.countdown-info strong {
  display: block;
  font-size: 1.05rem;
  color: var(--text-primary);
  margin-top: 4px;
}

.timer-display {
  display: flex;
  align-items: center;
  gap: 8px;
}

.timer-unit {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  text-align: center;
  min-width: 52px;
}

.timer-unit span {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent-cyan);
  display: block;
}

.timer-unit label {
  font-size: 0.65rem;
  color: var(--text-muted);
  font-weight: 700;
  letter-spacing: 0.05em;
}

.timer-colon {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--text-muted);
  font-weight: 700;
}

/* Track Filter Pills */
.tracks-nav {
  padding: 24px 0;
  position: sticky;
  top: 75px;
  background: rgba(12, 14, 18, 0.9);
  backdrop-filter: blur(10px);
  z-index: 30;
}

.filter-pills {
  display: flex;
  align-items: center;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: none;
}

.filter-pills::-webkit-scrollbar {
  display: none;
}

.pill-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition-fast);
}

.pill-btn:hover {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border-active);
}

.pill-btn.active {
  background: var(--text-primary);
  color: #000;
  border-color: var(--text-primary);
}

/* Main Grid */
.issues-main {
  padding: 20px 24px 80px;
}

.issues-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}

/* Issue Card */
.issue-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.issue-card:hover {
  border-color: var(--border-active);
  background: var(--bg-card);
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

.issue-card.locked {
  opacity: 0.75;
  border-style: dashed;
}

.issue-card.locked:hover {
  opacity: 0.9;
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.card-track-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.1);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
}

.card-status-badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

.card-status-badge.live {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
}

.card-status-badge.locked-status {
  background: rgba(148, 163, 184, 0.12);
  color: var(--text-muted);
}

.card-issue-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-amber);
  font-weight: 700;
  margin-bottom: 6px;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.card-subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 20px;
  flex: 1;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-subtle);
  padding-top: 16px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.read-action-btn {
  background: var(--bg-card);
  color: var(--accent-amber);
  border: 1px solid var(--border-subtle);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-fast);
}

.read-action-btn:hover {
  background: var(--accent-amber);
  color: #000;
  border-color: var(--accent-amber);
}

/* Full Reader Modal */
.reader-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
}

.reader-modal.active {
  display: flex;
}

.reader-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
}

.reader-container {
  position: relative;
  width: 90%;
  max-width: 860px;
  height: 90vh;
  background: var(--bg-surface);
  border: 1px solid var(--border-active);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.7);
}

.reader-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-card);
}

.reader-meta-top {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.reader-track {
  color: var(--accent-cyan);
  font-weight: 700;
}

.reader-issue-num {
  color: var(--accent-amber);
  font-weight: 700;
}

.reader-close-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}

.reader-close-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.reader-scrollable {
  flex: 1;
  overflow-y: auto;
  padding: 40px 48px;
}

/* Markdown Reader Styling */
.markdown-body {
  color: var(--text-primary);
  font-size: 1.05rem;
  line-height: 1.75;
}

.markdown-body h1 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 24px;
  line-height: 1.2;
}

.markdown-body h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 36px 0 16px;
  color: var(--text-primary);
}

.markdown-body p {
  margin-bottom: 20px;
  color: #cbd5e1;
}

.markdown-body img {
  width: 100%;
  border-radius: var(--radius-md);
  margin: 20px 0 8px;
  border: 1px solid var(--border-subtle);
}

.markdown-body em {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: block;
  margin-bottom: 24px;
}

.markdown-body blockquote {
  background: var(--bg-card);
  border-left: 4px solid var(--accent-amber);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 32px 0;
}

.markdown-body blockquote h3 {
  color: var(--accent-amber);
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.markdown-body blockquote p {
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.markdown-body hr {
  border: none;
  border-top: 1px solid var(--border-subtle);
  margin: 40px 0;
}

.reader-nav-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 32px;
  border-top: 1px solid var(--border-subtle);
  margin-top: 40px;
}

/* Site Footer */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: 60px 0 0;
  background: var(--bg-surface);
  font-size: 0.9rem;
}

.footer-container {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
  padding-bottom: 40px;
}

.footer-left {
  max-width: 440px;
}

.footer-desc {
  color: var(--text-muted);
  margin-top: 12px;
}

.footer-desc a {
  color: var(--accent-cyan);
  text-decoration: none;
}

.footer-sponsor-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  max-width: 460px;
}

.footer-sponsor-box h4 {
  color: var(--accent-amber);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.footer-sponsor-box p {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.footer-sponsor-box a {
  color: var(--accent-amber);
  font-weight: 600;
  text-decoration: none;
}

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding: 20px 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
}

@media (max-width: 768px) {
  .hero-heading { font-size: 2rem; }
  .reader-container { width: 100%; height: 100vh; border-radius: 0; }
  .reader-scrollable { padding: 24px; }
  .countdown-card { text-align: center; justify-content: center; }
  .countdown-info { text-align: center; }
}

/* SlabLogic Main Site Integration Links */
.brand-link {
  text-decoration: none;
  color: inherit;
  transition: var(--transition-fast);
}

.brand-link:hover {
  opacity: 0.9;
}

.sponsor-left {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.main-site-pill {
  color: var(--accent-cyan);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  background: rgba(6, 182, 212, 0.12);
  border: 1px solid rgba(6, 182, 212, 0.3);
  padding: 2px 10px;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}

.main-site-pill:hover {
  background: rgba(6, 182, 212, 0.25);
  border-color: var(--accent-cyan);
}

.nav-link-main {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  transition: var(--transition-fast);
}

.nav-link-main:hover {
  color: var(--text-primary);
}

.reader-parent-link {
  color: var(--accent-cyan);
  text-decoration: none;
  font-weight: 700;
}

.reader-parent-link:hover {
  text-decoration: underline;
}

.footer-links {
  margin-top: 16px;
}

.footer-nav-link {
  color: var(--accent-cyan);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
}

.footer-nav-link:hover {
  text-decoration: underline;
}