/* ========================================
   LAYOUT.CSS — Page & Section Layouts
   CMUS++ Website
   ======================================== */

/* ---- Container ---- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2.5rem;
}

.container-sm {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 2.5rem;
}

/* ---- Page wrapper ---- */
.page {
  padding-top: 58px; /* nav height */
}

/* ---- Section ---- */
.section {
  padding: 7rem 0;
}

.section-sm {
  padding: 4rem 0;
}

.section-head {
  margin-bottom: 4rem;
}

.section-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--fg-muted);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.section-label::before {
  content: '';
  width: 32px;
  height: 2px;
  background: var(--fg-muted);
  display: inline-block;
}

/* ---- Hero Section ---- */
.hero {
  padding: 6rem 0 5rem;
  position: relative;
  overflow: hidden;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4rem;
  align-items: end;
}

.hero__tag {
  margin-bottom: 1.5rem;
}

.hero__subtitle {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem 2rem;
}

.hero__subtitle p {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--fg-muted);
}

.hero__actions {
  margin-top: 2.5rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero__visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.hero__ascii {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.55rem;
  line-height: 1.2;
  color: var(--fg-faint);
  white-space: pre;
  transition: color var(--transition);
}
.hero__ascii:hover { color: var(--fg-muted); }

/* ---- Features Grid ---- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.feature-block {
  padding: 2.5rem 2rem;
  border: 1px solid var(--border);
  position: relative;
  transition: all var(--transition);
}

.feature-block::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--fg);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.feature-block:hover::before { transform: scaleX(1); }
.feature-block:hover {
  background: var(--bg-alt);
}

.feature-block__num {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.75rem;
  color: var(--fg-faint);
  margin-bottom: 1.5rem;
}

.feature-block__title {
  font-size: 1.3rem;
  margin-bottom: 0.75rem;
}

.feature-block__text {
  font-size: 0.9rem;
  color: var(--fg-muted);
  line-height: 1.65;
}

.feature-block__tags {
  margin-top: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

/* ---- Install Section ---- */
.install-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.install-steps {
  counter-reset: steps;
}

.install-step {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.install-step__num {
  counter-increment: steps;
  flex-shrink: 0;
  width: 36px; height: 36px;
  border: 2px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--fg-muted);
}

.install-step__content h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  line-height: 1.2;
}

.install-step__content p {
  font-size: 0.9rem;
  color: var(--fg-muted);
  margin-bottom: 0.75rem;
}

/* ---- Controls Table Section ---- */
.controls-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

/* ---- Themes Showcase ---- */
.themes-preview {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 2.5rem;
}

.theme-card {
  border: 2px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition);
}

.theme-card:hover {
  border-color: var(--fg);
  transform: scale(1.02);
}

.theme-card__preview {
  height: 80px;
  padding: 0.75rem;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.6rem;
  line-height: 1.4;
}

.theme-card__name {
  padding: 0.5rem 0.75rem;
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-top: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--fg);
}

/* ---- Footer ---- */
.footer {
  border-top: 1px solid var(--border);
  padding: 3rem 0;
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
}

.footer__brand {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.85rem;
  font-weight: 600;
}

.footer__links {
  display: flex;
  gap: 2rem;
}

.footer__links a {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--fg-muted);
  transition: color var(--transition);
}
.footer__links a:hover { color: var(--fg); }

.footer__copy {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.75rem;
  color: var(--fg-faint);
}

/* ---- Docs layout ---- */
.docs-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 4rem;
  align-items: start;
}

.docs-sidebar {
  position: sticky;
  top: 80px;
}

.docs-nav-section {
  margin-bottom: 2rem;
}

.docs-nav-section__title {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--fg-faint);
  margin-bottom: 0.75rem;
}

.docs-nav-section a {
  display: block;
  padding: 0.35rem 0;
  font-size: 0.9rem;
  color: var(--fg-muted);
  transition: color var(--transition);
  border-left: 2px solid transparent;
  padding-left: 0.75rem;
  transition: all 0.2s;
}

.docs-nav-section a:hover { color: var(--fg); }
.docs-nav-section a.active {
  color: var(--fg);
  border-left-color: var(--fg);
}

.docs-content h2 {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  margin-bottom: 1rem;
  margin-top: 3.5rem;
  padding-top: 1rem;
}

.docs-content h2:first-child { margin-top: 0; }

.docs-content h3 {
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
  margin-top: 2rem;
}

.docs-content p {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--fg-muted);
  margin-bottom: 1rem;
}

.docs-content p strong { color: var(--fg); }

.docs-content ul {
  list-style: none;
  margin-bottom: 1.25rem;
}

.docs-content ul li {
  padding: 0.3rem 0;
  font-size: 0.95rem;
  color: var(--fg-muted);
  padding-left: 1rem;
  position: relative;
}

.docs-content ul li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--fg-faint);
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: 1fr 1fr; }
  .install-grid { grid-template-columns: 1fr; }
  .controls-grid { grid-template-columns: 1fr; }
  .docs-layout { grid-template-columns: 1fr; }
  .docs-sidebar { position: static; }
}

@media (max-width: 768px) {
  .container { padding: 0 1.25rem; }
  .container-sm { padding: 0 1.25rem; }
  .section { padding: 4rem 0; }
  .features-grid { grid-template-columns: 1fr; }
  .themes-preview { grid-template-columns: 1fr 1fr; }
  .hero__inner { grid-template-columns: 1fr; }
  .hero__visual { display: none; }
  .hero__subtitle { grid-template-columns: 1fr; }
  .footer__inner { flex-direction: column; text-align: center; }
  .footer__links { flex-wrap: wrap; justify-content: center; }
}