:root {
  --bg: #f8fafc;
  --bg-muted: #f1f5f9;
  --surface: #ffffff;
  --surface-border: #dbe3ef;
  --text: #0f172a;
  --text-muted: #475569;
  --accent: #2563eb;
  --accent-strong: #1d4ed8;
  --accent-soft: #dbeafe;
  --shadow-sm: 0 8px 20px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 12px 30px rgba(15, 23, 42, 0.1);
  --radius-md: 14px;
  --radius-lg: 18px;
  --container: min(1160px, 92vw);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #ffffff 0%, var(--bg) 50%, #ffffff 100%);
  line-height: 1.5;
}

a {
  color: inherit;
}

.skip-link {
  position: absolute;
  left: -9999px;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
  z-index: 1000;
  background: #fff;
  border: 1px solid var(--surface-border);
  border-radius: 8px;
  padding: 0.5rem 0.75rem;
}

.container {
  width: var(--container);
  margin-inline: auto;
}

.section {
  padding: 5rem 0;
}

.section-muted {
  background: var(--bg-muted);
  border-top: 1px solid var(--surface-border);
  border-bottom: 1px solid var(--surface-border);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--surface-border);
}

.nav-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  text-decoration: none;
}

.primary-nav {
  display: flex;
  gap: 1.2rem;
}

.primary-nav a {
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 500;
}

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

.nav-toggle {
  display: none;
  background: transparent;
  border: none;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
  display: block;
  margin: 4px 0;
}

.hero {
  position: relative;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at top right, rgba(37, 99, 235, 0.14), transparent 38%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2rem;
  align-items: center;
}

.eyebrow {
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 0.8rem;
  margin: 0;
}

.brand-banner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-start;
  gap: 0.8rem;
  margin-bottom: 1.6rem;
}

.brand-logo {
  width: 250px;
  height: auto;
  object-fit: contain;
  display: block;
}

h1 {
  font-size: clamp(2.2rem, 4vw, 3.5rem);
  margin: 0;
}

h2 {
  font-size: clamp(1.7rem, 2.2vw, 2.4rem);
  margin-top: 0;
}

.hero-subtitle {
  font-size: 1.2rem;
  margin-top: 1rem;
  color: #1e293b;
}

.hero-description,
.section-intro {
  color: var(--text-muted);
  max-width: 70ch;
}

.hero-actions {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin-top: 1.2rem;
}

.btn {
  border-radius: 12px;
  border: 1px solid transparent;
  padding: 0.75rem 1rem;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.2s ease;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--accent) 0%, #4f46e5 100%);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--surface);
  border-color: var(--surface-border);
}

.btn-secondary:hover,
.btn-ghost:hover {
  border-color: #bfd0ec;
  color: var(--accent);
}

.btn-ghost {
  border-color: var(--surface-border);
}

.hero-preview .preview-card {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: 1.2rem;
  box-shadow: var(--shadow-md);
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}

.kpi-grid article {
  border: 1px solid var(--surface-border);
  background: #fbfdff;
  padding: 0.8rem;
  border-radius: var(--radius-md);
}

.kpi-grid span {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.card-grid,
.architecture-grid,
.stack-grid,
.commands-grid,
.preview-grid {
  display: grid;
  gap: 1rem;
}

.card-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card,
.arch-card,
.stack-item,
.command-card,
.surface {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-md);
  padding: 1.15rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover,
.arch-card:hover,
.stack-item:hover,
.surface:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.preview-grid,
.commands-grid {
  margin-top: 1.2rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.architecture-grid,
.stack-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

pre {
  margin: 0;
  background: #f8fbff;
  border: 1px solid #d5e1f3;
  border-radius: 12px;
  overflow-x: auto;
  padding: 0.8rem;
}

code {
  font-family: "JetBrains Mono", Consolas, Monaco, monospace;
  font-size: 0.82rem;
}

.doc-links {
  display: grid;
  gap: 0.8rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.doc-link {
  text-decoration: none;
  border: 1px solid var(--surface-border);
  background: var(--surface);
  border-radius: 12px;
  padding: 0.9rem 1rem;
}

.doc-link:hover {
  border-color: #bfd0ec;
  color: var(--accent);
}

.roadmap-list {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--text-muted);
}

.site-footer {
  padding: 2rem 0;
  border-top: 1px solid var(--surface-border);
  background: #fff;
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-grid div {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  color: var(--text-muted);
}

@media (max-width: 992px) {
  .hero-grid,
  .card-grid,
  .preview-grid,
  .architecture-grid,
  .stack-grid,
  .commands-grid,
  .doc-links {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 760px) {
  .nav-toggle {
    display: inline-block;
  }

  .primary-nav {
    position: absolute;
    top: 72px;
    right: 4vw;
    left: 4vw;
    background: #fff;
    border: 1px solid var(--surface-border);
    border-radius: 12px;
    padding: 0.9rem;
    box-shadow: var(--shadow-sm);
    display: none;
    flex-direction: column;
  }

  .primary-nav.open {
    display: flex;
  }

  .hero-grid,
  .card-grid,
  .preview-grid,
  .architecture-grid,
  .stack-grid,
  .commands-grid,
  .doc-links {
    grid-template-columns: 1fr;
  }
}