/* ─────────────────────────────────────────────────────────────
   Mottled — landing page
   Design tokens adapted from the Incision design language.
   ───────────────────────────────────────────────────────────── */

:root {
  /* color */
  --color-void:           #04060E;
  --color-base:           #080B18;
  --color-surface-0:      #0C1020;
  --color-surface-1:      #11162A;
  --color-border-subtle:  #161B2C;
  --color-border-default: #1E2540;
  --color-border-strong:  #283050;
  --color-fg-1:           #EDF0FA;
  --color-fg-2:           #818FB8;
  --color-fg-3:           #4F5A7A;
  --color-fg-inverse:     #06080E;
  --color-accent:         #4B7CF3;
  --color-accent-hover:   #6490F6;
  --color-accent-border:  rgba(75, 124, 243, 0.22);

  /* type */
  --font-display: 'Cormorant Garamond', 'Georgia', 'Times New Roman', serif;
  --font-sans:    'DM Sans', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
  --font-mono:    'JetBrains Mono', 'Courier New', 'Lucida Console', monospace;
  --tracking-overline: 0.16em;

  /* shape & motion */
  --radius-xs: 2px;
  --radius-sm: 3px;
  --ease-precision: cubic-bezier(0.16, 1.00, 0.30, 1.00);
  --shadow-panel: 0 16px 64px rgba(0, 0, 0, 0.80), 0 4px 16px rgba(0, 0, 0, 0.55);
  --inset-top: inset 0 1px 0 rgba(255, 255, 255, 0.04);
  --glow-accent: 0 0 24px rgba(75, 124, 243, 0.30);

  /* layout */
  --content: 1080px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--color-base);
  color: var(--color-fg-1);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* ── Backdrop ─────────────────────────────────────────────── */
.bg-grid {
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background-image:
    linear-gradient(rgba(75, 124, 243, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(75, 124, 243, 0.045) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: linear-gradient(to bottom, black 0, black 720px, transparent 1100px);
  -webkit-mask-image: linear-gradient(to bottom, black 0, black 720px, transparent 1100px);
}
.bg-glow {
  position: fixed; top: -10%; left: 8%; z-index: -1; pointer-events: none;
  width: 640px; height: 640px;
  background: radial-gradient(circle, rgba(75, 124, 243, 0.06) 0%, transparent 70%);
}

/* ── Nav ──────────────────────────────────────────────── */
.nav {
  position: sticky; top: 0; z-index: 100;
  height: 52px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  padding: 0 40px;
  background: rgba(8, 11, 24, 0.90);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  backdrop-filter: blur(16px) saturate(160%);
  border-bottom: 1px solid var(--color-border-subtle);
}
.wordmark {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 12px; font-weight: 500; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--color-fg-1); text-decoration: none;
}
.wordmark-tick { width: 14px; height: 14px; border: 1px solid var(--color-accent); position: relative; }
.wordmark-tick::after {
  content: ""; position: absolute; inset: 3px;
  background: var(--color-accent); border-radius: 50%;
}
.wordmark-mark {
  width: 22px; height: 22px; display: block; flex-shrink: 0;
  border: 1px solid var(--color-border-default);
}
.nav-links { display: flex; gap: 32px; }
.nav-links a {
  font-size: 13px; color: var(--color-fg-2); text-decoration: none;
  transition: color 100ms var(--ease-precision);
}
.nav-links a:hover { color: var(--color-fg-1); }

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 500; text-decoration: none;
  padding: 10px 22px; border-radius: var(--radius-sm);
  transition: background 100ms var(--ease-precision),
              box-shadow 150ms var(--ease-precision),
              border-color 100ms var(--ease-precision),
              color 100ms var(--ease-precision);
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--color-accent); color: var(--color-fg-inverse); }
.btn-primary:hover { background: var(--color-accent-hover); box-shadow: var(--glow-accent); }
.btn-ghost { border: 1px solid var(--color-border-default); color: var(--color-fg-2); }
.btn-ghost:hover { border-color: var(--color-border-strong); color: var(--color-fg-1); }
.btn-sm { padding: 6px 14px; }

/* ── Overline ─────────────────────────────────────────────── */
.overline {
  display: flex; align-items: center; gap: 12px;
  font-size: 10px; font-weight: 500; letter-spacing: var(--tracking-overline);
  text-transform: uppercase; color: var(--color-accent);
  margin-bottom: 28px;
}
.overline-rule { width: 20px; height: 1px; background: var(--color-accent); flex-shrink: 0; }

/* ── Hero ─────────────────────────────────────────────── */
.hero {
  max-width: var(--content); margin: 0 auto;
  padding: 112px 40px 72px;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(40px, 5vw, 68px);
  font-weight: 300; line-height: 1.08; letter-spacing: -0.02em;
  max-width: 17ch;
  margin-bottom: 28px;
}
.hero h1 em { font-style: italic; }
.hero-lede {
  color: var(--color-fg-2); max-width: 620px;
  margin-bottom: 44px; text-wrap: pretty;
}
.hero-ctas { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.hero-pipeline {
  margin-top: 56px;
  font-family: var(--font-mono); font-size: 11px; color: var(--color-fg-3);
  letter-spacing: 0.02em;
  border-top: 1px solid var(--color-border-subtle);
  padding-top: 20px;
}

/* ── Screenshot panels ──────────────────────────────────── */
.shots {
  max-width: var(--content); margin: 0 auto;
  padding: 0 40px 40px;
  display: flex; flex-direction: column; gap: 56px;
}
.panel {
  background: var(--color-surface-0);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xs);
  box-shadow: var(--shadow-panel), var(--inset-top);
  overflow: hidden;
}
.shots .panel:nth-child(2) { max-width: 78%; align-self: flex-end; }
.panel-bar {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 11px 16px;
  border-bottom: 1px solid var(--color-border-subtle);
}
.panel-label {
  font-size: 10px; font-weight: 500; letter-spacing: 0.10em;
  text-transform: uppercase; color: var(--color-fg-2);
}
.panel-meta { font-family: var(--font-mono); font-size: 10px; color: var(--color-fg-3); }
.panel img { display: block; width: 100%; height: auto; }
.panel-caption {
  padding: 12px 16px;
  border-top: 1px solid var(--color-border-subtle);
  font-size: 12px; color: var(--color-fg-3); text-wrap: pretty;
}

/* ── Sections ───────────────────────────────────────────── */
.section {
  max-width: var(--content); margin: 0 auto;
  padding: 88px 40px 8px;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(30px, 3.4vw, 42px);
  font-weight: 300; line-height: 1.1; letter-spacing: -0.02em;
  margin-bottom: 20px;
}
.section-lede { color: var(--color-fg-2); max-width: 640px; margin-bottom: 48px; text-wrap: pretty; }

/* ── Feature grid ───────────────────────────────────────── */
.feature-grid {
  margin-top: 48px;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.card {
  background: var(--color-surface-0);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xs);
  box-shadow: var(--inset-top);
  padding: 24px 20px 20px;
  transition: border-color 100ms var(--ease-precision),
              background 100ms var(--ease-precision);
}
.card:hover { border-color: var(--color-border-strong); background: var(--color-surface-1); }
.card-index {
  font-family: var(--font-mono); font-size: 10px; color: var(--color-accent);
  letter-spacing: 0.06em; display: block; margin-bottom: 16px;
}
.card h3 { font-size: 15px; font-weight: 500; margin-bottom: 8px; }
.card p { font-size: 13px; line-height: 1.6; color: var(--color-fg-2); }

code {
  font-family: var(--font-mono); font-size: 0.92em;
  color: var(--color-fg-1);
  background: var(--color-surface-1);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-xs);
  padding: 1px 5px;
}

/* ── Architecture diagram ─────────────────────────────── */
.diagram {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 16px; align-items: center;
  padding: 32px 24px;
  background: var(--color-surface-0);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xs);
  box-shadow: var(--inset-top);
  background-image:
    linear-gradient(rgba(75, 124, 243, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(75, 124, 243, 0.04) 1px, transparent 1px);
  background-size: 32px 32px;
}
.diagram-col { display: flex; flex-direction: column; gap: 10px; }
.diagram-head {
  font-size: 10px; font-weight: 500; letter-spacing: var(--tracking-overline);
  text-transform: uppercase; color: var(--color-fg-3);
  margin-bottom: 6px;
}
.node {
  font-family: var(--font-mono); font-size: 12px; color: var(--color-fg-1);
  background: var(--color-surface-1);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xs);
  padding: 10px 14px;
}
.node-meta {
  display: block; font-size: 10px; color: var(--color-fg-3);
  font-family: var(--font-sans); letter-spacing: 0.02em; margin-top: 2px;
}
.node-future { color: var(--color-fg-3); border-style: dashed; background: transparent; }
.node-core {
  border-color: var(--color-accent-border);
  background: rgba(75, 124, 243, 0.08);
  color: var(--color-fg-1);
}
.diagram-center .diagram-head { text-align: center; }
.diagram-center .node { text-align: center; }
.diagram-link { width: 1px; height: 20px; background: var(--color-accent-border); margin: 0 auto; }
.diagram-flow { color: var(--color-fg-3); font-family: var(--font-mono); font-size: 14px; text-align: center; }

/* ── Quickstart ───────────────────────────────────────── */
.quickstart-grid {
  margin-top: 48px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 20px;
}
.code-panel {
  background: var(--color-surface-0);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xs);
  box-shadow: var(--inset-top);
  overflow: hidden;
}
.code-panel pre {
  padding: 20px 16px;
  background: var(--color-void);
  overflow-x: auto;
}
.code-panel pre code {
  background: none; border: none; padding: 0;
  font-size: 13px; line-height: 1.9; color: var(--color-fg-1);
}
.code-comment { color: var(--color-fg-3); }
.code-note {
  padding: 12px 16px;
  border-top: 1px solid var(--color-border-subtle);
  font-size: 12px; color: var(--color-fg-2);
}
.code-note a { color: var(--color-accent); text-decoration: none; }
.code-note a:hover { color: var(--color-accent-hover); }

/* ── Footer ─────────────────────────────────────────────── */
.footer {
  max-width: var(--content); margin: 96px auto 0;
  padding: 24px 40px 40px;
  border-top: 1px solid var(--color-border-subtle);
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.footer-mark {
  font-size: 11px; font-weight: 500; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--color-fg-3);
}
.footer-links { display: flex; gap: 24px; }
.footer-links a {
  font-size: 12px; color: var(--color-fg-2); text-decoration: none;
  transition: color 100ms var(--ease-precision);
}
.footer-links a:hover { color: var(--color-fg-1); }
.footer-license { font-family: var(--font-mono); font-size: 10px; color: var(--color-fg-3); }

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 900px) {
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .diagram { grid-template-columns: 1fr; }
  .diagram-flow { transform: rotate(90deg); padding: 4px 0; }
  .shots .panel:nth-child(2) { max-width: 100%; align-self: stretch; }
}

@media (max-width: 640px) {
  .nav { padding: 0 20px; }
  .nav-links { display: none; }
  .hero { padding: 72px 20px 56px; }
  .section { padding: 64px 20px 8px; }
  .shots { padding: 0 20px 24px; gap: 32px; }
  .feature-grid, .quickstart-grid { grid-template-columns: 1fr; }
  .footer { flex-wrap: wrap; padding: 24px 20px 40px; }
  .panel-bar { flex-wrap: wrap; row-gap: 4px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; }
  html { scroll-behavior: auto; }
}