/* Landing page — uses tokens from style.css */

.landing-body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--color-text);
  background:
    radial-gradient(ellipse 90% 55% at 50% -30%, rgba(13, 148, 136, 0.14), transparent),
    radial-gradient(ellipse 55% 45% at 105% 5%, rgba(99, 102, 241, 0.07), transparent),
    var(--color-bg-page);
  -webkit-font-smoothing: antialiased;
}

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

/* —— Top bar —— */
.landing-top {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.landing-top-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0.75rem clamp(1rem, 3vw, 1.5rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 1.5rem;
  flex-wrap: wrap;
}

.landing-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--color-text);
  font-weight: 700;
  font-size: 1.125rem;
  flex-shrink: 0;
}

.landing-brand-mark {
  display: block;
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

.landing-top-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 0.4rem 1.1rem;
  flex: 1 1 auto;
  min-width: 0;
}

.landing-top-nav a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
  white-space: nowrap;
}

.landing-top-nav a:hover {
  color: var(--color-accent);
}

.landing-top-nav a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.landing-nav-cta {
  padding: 0.45rem 0.95rem;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-hover));
  color: var(--color-on-accent) !important;
  font-weight: 600;
}

.landing-nav-cta:hover {
  filter: brightness(1.06);
  color: var(--color-on-accent) !important;
}

/* —— Main column —— */
.landing-main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 3vw, 1.5rem) 4rem;
  width: 100%;
}

.landing-hero {
  padding: clamp(2rem, 5vw, 3rem) 0 clamp(1.75rem, 4vw, 2.5rem);
  text-align: center;
}

.landing-hero-wordmark {
  width: 100%;
  max-width: min(520px, 92vw);
  margin: 0 auto 1.5rem;
  display: block;
}

.landing-hero h1 {
  font-size: clamp(1.65rem, 4.2vw, 2.35rem);
  font-weight: 800;
  line-height: 1.2;
  margin: 0 0 1rem;
  color: var(--color-text);
  letter-spacing: -0.025em;
}

.landing-hero-eyebrow {
  margin: 0 0 0.65rem;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent-text);
}

.landing-hero-lead {
  font-size: clamp(1rem, 2.2vw, 1.125rem);
  color: var(--color-text-secondary);
  max-width: 44rem;
  margin: 0 auto 1.35rem;
}

.landing-hero-lead strong {
  color: var(--color-text);
  font-weight: 650;
}

.landing-badge-row {
  list-style: none;
  margin: 0 auto 1.75rem;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.45rem 0.55rem;
  max-width: 46rem;
}

.landing-badge-row li {
  margin: 0;
  padding: 0.35rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-accent-text);
  background: var(--color-accent-muted);
  border: 1px solid rgba(13, 148, 136, 0.22);
  border-radius: 999px;
  line-height: 1.25;
}

.landing-cta-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.75rem;
}

.landing-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.2rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9375rem;
  text-decoration: none;
  border: 2px solid transparent;
  transition: filter 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.landing-btn-primary {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-hover));
  color: var(--color-on-accent);
}

.landing-btn-primary:hover {
  filter: brightness(1.06);
  color: var(--color-on-accent);
}

.landing-btn-secondary {
  background: var(--color-bg-elevated);
  color: var(--color-text);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-sm);
}

.landing-btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-text);
}

/* —— Sections —— */
.landing-section {
  margin-top: 2.5rem;
  padding-top: 2.25rem;
  border-top: 1px solid var(--color-border);
}

.landing-section h2 {
  font-size: 1.45rem;
  font-weight: 800;
  margin: 0 0 1rem;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.landing-section-lead {
  margin: 0 0 0.25rem;
  color: var(--color-text-secondary);
  max-width: 48rem;
  line-height: 1.55;
}

.landing-section-lead-wide {
  max-width: 52rem;
  margin-bottom: 1.25rem;
}

.landing-section-lead-wide code {
  font-size: 0.9em;
  padding: 0.12em 0.38em;
}

.landing-subheading {
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin: 2rem 0 0.85rem;
}

.landing-prose {
  margin: 0;
  max-width: 48rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

.landing-prose a {
  color: var(--color-accent);
  font-weight: 500;
}

.landing-prose-note {
  margin-top: 1.5rem;
  padding: 1rem 1.15rem;
  max-width: 52rem;
  background: var(--color-accent-muted);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-accent);
}

/* —— Differentiation table —— */

.landing-diff-table-wrap {
  margin-top: 1.25rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  background: var(--color-bg-elevated);
}

.landing-diff-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 0.9rem;
  line-height: 1.5;
}

.landing-diff-table thead {
  background: linear-gradient(180deg, rgba(241, 245, 249, 0.95), rgba(248, 250, 252, 0.98));
}

.landing-diff-table th,
.landing-diff-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--color-border);
}

.landing-diff-table th[scope="col"] {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
}

.landing-diff-table th[scope="col"]:first-child {
  width: 26%;
}

.landing-diff-table th[scope="row"] {
  font-family: var(--font-sans);
  font-weight: 600;
  color: var(--color-text);
  background: rgba(241, 245, 249, 0.45);
}

.landing-diff-table tbody tr:last-child th,
.landing-diff-table tbody tr:last-child td {
  border-bottom: none;
}

.landing-diff-table td {
  color: var(--color-text-secondary);
}

.landing-diff-table a {
  color: var(--color-accent);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

.landing-diff-table a:hover {
  color: var(--color-accent-hover);
}

.landing-diff-table tbody tr:nth-child(even) td {
  background: rgba(248, 250, 252, 0.85);
}

.landing-diff-table tbody tr:nth-child(even) th[scope="row"] {
  background: rgba(236, 253, 245, 0.35);
}

.landing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem 1.25rem;
  margin-top: 1.1rem;
}

.landing-card {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.35rem;
  box-shadow: var(--shadow-sm);
}

.landing-card strong {
  display: block;
  font-size: 1rem;
  margin-bottom: 0.35rem;
  color: var(--color-text);
}

.landing-card p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.55;
}

.landing-card a {
  color: var(--color-accent);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

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

.landing-card code {
  font-size: 0.875em;
  color: var(--color-code-inline);
  background: var(--color-code-bg);
  padding: 0.12em 0.35em;
  border-radius: var(--radius-sm);
}

/* —— Code sample (Rouge / highlight) —— */
.landing-code-panel {
  margin-top: 1.15rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: var(--color-pre-bg);
  box-shadow: var(--shadow-lg);
}

.landing-code-panel .highlight,
.landing-code-panel figure.highlight {
  margin: 0 !important;
  border: none !important;
  background: transparent !important;
}

.landing-code-panel .highlighter-rouge {
  margin: 0 !important;
  background: transparent !important;
}

.landing-code-panel pre {
  margin: 0 !important;
  padding: 1.2rem 1.35rem !important;
  overflow-x: auto;
  background: transparent !important;
  border: none !important;
  -webkit-overflow-scrolling: touch;
}

.landing-code-panel pre code {
  font-family: ui-monospace, "Cascadia Code", "SF Mono", Menlo, Consolas, monospace !important;
  font-size: 0.8125rem !important;
  line-height: 1.65 !important;
  /* slate-100 on slate-900: high contrast for code body */
  color: var(--color-on-inverse) !important;
  background: transparent !important;
  white-space: pre !important;
  display: block;
  tab-size: 4;
}

/* Optional Rouge line-number gutter */
.landing-code-panel .gutter {
  color: var(--color-on-inverse-subtle);
  opacity: 0.85;
  padding-right: 1rem !important;
  user-select: none;
}

/* —— Mermaid diagram —— */
.landing-diagram {
  margin-top: 0.25rem;
  padding: 1.35rem 1rem 1.5rem;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  box-shadow: var(--shadow-sm);
}

.landing-diagram .mermaid {
  margin: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 120px;
}

.landing-main .mermaid {
  margin: 1.25rem 0;
  text-align: center;
}

/* —— Doc pillars —— */
.landing-pillars {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
}

.landing-pillars li {
  margin-bottom: 0.7rem;
  padding-left: 0;
  line-height: 1.55;
  color: var(--color-text-secondary);
}

.landing-pillars a {
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
}

.landing-pillars a:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

/* —— Footer —— */
.landing-footer {
  margin-top: 3.5rem;
  padding: 2.5rem 1.5rem;
  background: linear-gradient(180deg, var(--color-pre-bg) 0%, var(--color-inverse-deep) 100%);
  color: var(--color-on-inverse-muted);
  font-size: 0.9rem;
}

.landing-footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  text-align: center;
}

.landing-footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-on-inverse);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.landing-footer-brand img {
  border-radius: var(--radius-sm);
}

.landing-footer-tagline {
  margin: 0 0 1rem;
  max-width: 28rem;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.5;
  color: var(--color-pre-text);
}

.landing-footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.landing-footer-links a {
  color: var(--color-on-inverse);
  text-decoration: none;
}

.landing-footer-links a:hover {
  color: var(--color-bg-elevated);
  text-decoration: underline;
}

.landing-footer-copy {
  margin: 0;
  font-size: 0.8rem;
  color: var(--color-on-inverse-muted);
}

@media (max-width: 640px) {
  .landing-top-nav {
    justify-content: flex-start;
    width: 100%;
  }

  .landing-top-inner {
    flex-direction: column;
    align-items: stretch;
  }

  .landing-brand {
    width: 100%;
  }
}