:root {
  --bg: #f7f8fb;
  --panel: #ffffff;
  --text: #172033;
  --muted: #667085;
  --line: #e5e7eb;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --green: #16a34a;
  --soft: #eef4ff;
  --soft-green: #ecfdf5;
  --shadow: 0 18px 45px rgba(15, 23, 42, 0.08);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(37, 99, 235, 0.08), transparent 34%),
    radial-gradient(circle at top right, rgba(22, 163, 74, 0.08), transparent 30%),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(14px);
  background: rgba(247, 248, 251, 0.8);
  border-bottom: 1px solid rgba(229, 231, 235, 0.75);
}

.nav {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 850;
  letter-spacing: 0;
  font-size: 20px;
}

.logo {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: linear-gradient(135deg, #2563eb, #22c55e);
  box-shadow: 0 10px 25px rgba(37, 99, 235, 0.24);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  line-height: 1.1;
}

.brand-subtitle {
  color: var(--muted);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.nav-actions a:hover {
  color: var(--text);
}

select {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  border-radius: 999px;
  padding: 9px 14px;
  font-size: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 12px 20px;
  font-weight: 800;
  border: 1px solid transparent;
  transition: 0.2s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 12px 24px rgba(37, 99, 235, 0.22);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

.btn-secondary {
  background: #fff;
  color: var(--text);
  border-color: var(--line);
}

.btn-secondary:hover {
  border-color: #cbd5e1;
  transform: translateY(-1px);
}

.hero {
  padding: 92px 0 60px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.03fr 0.97fr;
  gap: 50px;
  align-items: center;
}

.badge,
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--soft);
  color: #1d4ed8;
  border: 1px solid #dbeafe;
  padding: 8px 13px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 850;
  margin: 0 0 18px;
}

.eyebrow {
  background: var(--soft-green);
  color: #15803d;
  border-color: #bbf7d0;
}

h1 {
  font-size: 68px;
  line-height: 1.02;
  letter-spacing: 0;
  margin: 0 0 22px;
}

h2 {
  font-size: 42px;
  line-height: 1.1;
  letter-spacing: 0;
  margin: 0 0 14px;
}

h3 {
  margin: 0 0 8px;
  font-size: 20px;
  letter-spacing: 0;
}

.lead {
  font-size: 22px;
  color: var(--text);
  max-width: 700px;
  margin: 0 0 14px;
  font-weight: 650;
}

.sublead {
  color: var(--muted);
  font-size: 18px;
  max-width: 680px;
  margin: 0 0 30px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.mini-flow {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 10px 14px;
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.04);
  font-size: 14px;
  font-weight: 800;
}

.mini-flow strong {
  color: #94a3b8;
}

.product-shell {
  overflow: hidden;
  background: #111827;
  border: 1px solid #1f2937;
  border-radius: 8px;
  box-shadow: var(--shadow);
  color: #e5e7eb;
}

.product-window-bar {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 14px;
  align-items: center;
  padding: 12px 14px;
  background: #0f172a;
  border-bottom: 1px solid rgba(148, 163, 184, 0.22);
  font-size: 12px;
  color: #94a3b8;
}

.product-window-bar strong {
  color: #f8fafc;
  font-size: 13px;
}

.window-dots {
  display: flex;
  gap: 6px;
}

.window-dots span {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: #64748b;
}

.window-dots span:nth-child(1) {
  background: #f87171;
}

.window-dots span:nth-child(2) {
  background: #fbbf24;
}

.window-dots span:nth-child(3) {
  background: #34d399;
}

.product-workspace {
  display: grid;
  grid-template-columns: 145px 1fr;
  min-height: 430px;
  background: #f8fafc;
  color: #172033;
}

.product-sidebar {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px 12px;
  background: #fff;
  border-right: 1px solid #e5e7eb;
}

.product-sidebar strong {
  margin-bottom: 6px;
  font-size: 13px;
}

.product-sidebar span {
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  padding: 9px 10px;
  color: #475569;
  font-size: 12px;
  font-weight: 800;
}

.product-sidebar .active {
  color: #0f172a;
  background: #eef4ff;
  border-color: #bfdbfe;
}

.product-main {
  display: grid;
  gap: 12px;
  padding: 16px;
}

.product-panel,
.timeline-panel {
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.04);
}

.import-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  padding: 16px;
}

.panel-label {
  display: block;
  color: #64748b;
  font-size: 12px;
  font-weight: 850;
  margin-bottom: 4px;
}

.import-copy strong,
.archive-panel strong {
  display: block;
  font-size: 18px;
}

.import-copy strong {
  max-width: none;
  line-height: 1.35;
}

.sync-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  width: 100%;
}

.sync-metrics span {
  min-width: 0;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  padding: 9px 6px;
  text-align: center;
}

.sync-metrics b,
.duplicate-panel strong {
  display: block;
  color: #2563eb;
  font-size: 22px;
  line-height: 1;
}

.sync-metrics small {
  display: block;
  color: #64748b;
  font-size: 11px;
  font-weight: 750;
  line-height: 1.2;
}

.product-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.duplicate-panel,
.archive-panel {
  padding: 14px;
}

.duplicate-panel p,
.archive-panel p {
  margin: 8px 0 12px;
  color: #64748b;
  font-size: 13px;
}

.duplicate-panel button {
  border: 0;
  border-radius: 8px;
  background: #fee2e2;
  color: #991b1b;
  padding: 9px 10px;
  font-weight: 850;
}

.archive-panel {
  background: #f0fdf4;
  border-color: #bbf7d0;
}

.timeline-panel {
  padding: 14px;
}

.timeline-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
  color: #64748b;
  font-size: 12px;
  font-weight: 850;
}

.timeline-head strong {
  color: #172033;
}

.timeline-strip {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}

.timeline-strip span {
  aspect-ratio: 1 / 1;
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(15, 23, 42, 0.12), rgba(15, 23, 42, 0)),
    linear-gradient(135deg, #c7d2fe, #bbf7d0);
}

section {
  padding: 62px 0;
}

.section-title {
  max-width: 760px;
}

.section-title.wide {
  max-width: 860px;
  margin-bottom: 30px;
}

.section-title p:not(.eyebrow) {
  color: var(--muted);
  font-size: 18px;
  margin: 0;
}

.split {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 34px;
  align-items: start;
}

.story-card,
.card,
.roadmap-card,
.code {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.04);
}

.story-card {
  padding: 28px;
  font-size: 18px;
  color: var(--muted);
}

.story-card p {
  margin: 0 0 14px;
}

.story-card p:last-child {
  margin-bottom: 0;
}

.story-emphasis {
  color: var(--text) !important;
  font-weight: 800;
}

.cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.card {
  padding: 24px;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.icon {
  width: 46px;
  height: 46px;
  border-radius: 8px;
  background: var(--soft);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 15px;
  font-size: 23px;
}

.families-panel,
.philosophy {
  background: linear-gradient(135deg, #eff6ff, #f0fdf4);
  border: 1px solid #dbeafe;
  border-radius: 8px;
  padding: 38px;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 32px;
  align-items: center;
}

.families-panel p:not(.eyebrow),
.philosophy p:not(.eyebrow) {
  color: var(--muted);
  font-size: 18px;
}

.number-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.number-grid div {
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(229, 231, 235, 0.9);
  border-radius: 8px;
  padding: 20px;
}

.number-grid strong {
  display: block;
  font-size: 34px;
  letter-spacing: 0;
}

.number-grid span {
  color: var(--muted);
  font-weight: 750;
}

.roadmap-card {
  padding: 12px;
}

.roadmap-item {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 15px 16px;
  border-bottom: 1px solid var(--line);
}

.roadmap-item:last-child {
  border-bottom: 0;
}

.roadmap-item span {
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: #f1f5f9;
  color: #64748b;
  font-weight: 900;
}

.roadmap-item.done span {
  background: #dcfce7;
  color: #16a34a;
}

.principles {
  display: grid;
  gap: 14px;
}

.principle {
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(229, 231, 235, 0.9);
  border-radius: 8px;
  padding: 18px;
  display: flex;
  gap: 14px;
  align-items: center;
}

.principle span {
  color: var(--primary);
  font-weight: 900;
}

.code {
  background: #0f172a;
  color: #e5e7eb;
  padding: 24px;
  overflow-x: auto;
  box-shadow: var(--shadow);
}

pre {
  margin: 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 14px;
  line-height: 1.8;
}

footer {
  padding: 34px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.footer-row {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-row a:hover {
  color: var(--text);
}

@media (max-width: 960px) {
  .hero-grid,
  .split,
  .families-panel,
  .philosophy {
    grid-template-columns: 1fr;
  }

  .cards {
    grid-template-columns: repeat(2, 1fr);
  }

  .nav {
    padding: 16px 0;
    align-items: flex-start;
  }

  .nav-actions {
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .hero {
    padding-top: 58px;
  }

  h1 {
    font-size: 56px;
  }
}

@media (max-width: 620px) {
  .container {
    width: min(100% - 28px, 1120px);
  }

  .nav {
    flex-direction: column;
  }

  .nav-actions {
    width: 100%;
    justify-content: flex-start;
  }

  .nav-actions > a:not(.btn) {
    display: none;
  }

  .brand {
    font-size: 18px;
  }

  .brand-subtitle {
    font-size: 11px;
  }

  .btn {
    width: 100%;
  }

  .hero-actions {
    width: 100%;
  }

  .cards {
    grid-template-columns: 1fr;
  }

  .product-workspace,
  .import-panel,
  .product-grid {
    grid-template-columns: 1fr;
  }

  .product-sidebar {
    border-right: 0;
    border-bottom: 1px solid #e5e7eb;
  }

  .sync-metrics {
    grid-template-columns: repeat(3, 1fr);
  }

  .families-panel,
  .philosophy {
    padding: 26px;
  }

  h1 {
    font-size: 44px;
  }

  h2 {
    font-size: 30px;
  }
}