/* engram — landing page */

:root {
  --bg: #f4f5f7;
  --surface: #ffffff;
  --surface2: #eceef1;
  --text: #15171a;
  --text2: #5c6370;
  --text3: #666d75;
  --line: #dde0e5;
  --accent: #2e4fd6;
  --accent-soft: #2e4fd61a;

  --dark-bg: #0f1114;
  --dark-text: #edeff2;
  --dark-text2: #a3a9b3;
  --dark-text3: #828996;
  --dark-line: #272a30;
  --dark-accent: #7b96ff;

  --sans: 'Geist', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'Geist Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  --ease: cubic-bezier(0.23, 1, 0.32, 1);
  --measure: 1216px;
  --gutter: 48px;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; background: var(--bg); }

body {
  font-family: var(--sans);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}

a { color: var(--text); text-decoration: none; }
a:hover { color: var(--accent); }
::selection { background: var(--accent-soft); }

h1, h2, p { margin: 0; }
img { max-width: 100%; height: auto; display: block; }

.mono { font-family: var(--mono); }

.wrap {
  max-width: var(--measure);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

/* Nav ------------------------------------------------------------------- */

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 28px;
}
.brand { display: flex; align-items: center; gap: 9px; }
.brand svg { width: 22px; height: 22px; color: var(--text); }
.brand span { font-size: 17px; font-weight: 600; letter-spacing: -0.01em; }
.nav-links { display: flex; align-items: center; gap: 32px; font-size: 14px; font-weight: 500; }
.nav-links a { color: var(--text2); }
.nav-links a:hover { color: var(--accent); }

/* Hero ------------------------------------------------------------------ */

.hero {
  padding-top: 108px;
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 72px;
  align-items: center;
}
.eyebrow { font-family: var(--mono); font-size: 13px; color: var(--text3); letter-spacing: 0.02em; }
.hero h1 {
  font-size: 76px;
  font-weight: 600;
  letter-spacing: -0.045em;
  line-height: 1.02;
  margin-top: 20px;
}
.hero h1 .muted { color: var(--text3); }
.lede { font-size: 17px; line-height: 1.55; color: var(--text2); max-width: 480px; margin-top: 28px; text-wrap: pretty; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 28px; margin-top: 36px; }
.hero-note { font-size: 13px; color: var(--text3); margin-top: 20px; }

.btn {
  background: var(--text);
  color: var(--bg);
  font-size: 15px;
  font-weight: 500;
  padding: 13px 24px;
  border-radius: 10px;
  transition: transform 160ms var(--ease), background 160ms ease;
}
.btn:hover { background: var(--accent); color: var(--bg); }
.btn:active { transform: scale(0.97); }

.link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
  transition: border-color 160ms ease;
}
.link:hover { color: var(--text); border-bottom-color: var(--accent); }

/* Save demo (the loop: card folds into the trace, "saved") ---------------- */

.demo-stage {
  background: var(--surface2);
  border: 1px solid var(--line);
  border-radius: 20px;
  height: 360px;
  position: relative;
  overflow: hidden;
}
.demo-label { position: absolute; top: 18px; left: 22px; font-family: var(--mono); font-size: 12px; color: var(--text3); }
.demo-card {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 300px;
  margin: -62px 0 0 -150px;
  animation: cardLoop 5.2s cubic-bezier(0.77, 0, 0.175, 1) infinite;
}
.demo-card-inner {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px 20px;
  animation: cardContentLoop 5.2s ease infinite;
}
.demo-title { display: flex; align-items: center; gap: 8px; }
.demo-title svg { width: 16px; height: 16px; color: var(--text3); flex-shrink: 0; }
.demo-title span { font-size: 15px; font-weight: 500; letter-spacing: -0.01em; }
.demo-meta { font-family: var(--mono); font-size: 12px; color: var(--text3); margin: 8px 0 0 24px; }
.demo-tags { display: flex; gap: 6px; margin: 14px 0 0 24px; }
.demo-tags span { font-size: 12px; color: var(--text2); background: var(--surface2); border-radius: 6px; padding: 3px 9px; }
.demo-glyph {
  width: 44px;
  height: 44px;
  color: var(--accent);
  position: absolute;
  top: 50%;
  left: 50%;
  margin: -22px 0 0 -22px;
  animation: glyphLoop 5.2s var(--ease) infinite;
}
.demo-saved {
  position: absolute;
  top: 50%;
  left: 50%;
  margin: 34px 0 0 -22px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text3);
  animation: savedLoop 5.2s var(--ease) infinite;
}
.demo-caption { font-family: var(--mono); font-size: 12px; color: var(--text3); margin: 12px 0 0 4px; }

/* Features -------------------------------------------------------------- */

.features { padding-top: 140px; }
.feature {
  display: grid;
  grid-template-columns: 88px 1fr 400px;
  gap: 56px;
  padding: 64px 0;
  border-top: 1px solid var(--line);
  align-items: center;
}
.feature:last-child { border-bottom: 1px solid var(--line); }
.num { font-family: var(--mono); font-size: 13px; color: var(--text3); }
.feature h2 { font-size: 34px; font-weight: 600; letter-spacing: -0.025em; }
.feature p { font-size: 16px; line-height: 1.55; color: var(--text2); max-width: 460px; margin-top: 16px; text-wrap: pretty; }
.operators { font-family: var(--mono); font-size: 13px; color: var(--text3); margin-top: 20px; }
.aside { justify-self: center; }

.shot { width: 280px; border-radius: 20px; border: 1px solid var(--line); }

.tags { display: flex; flex-wrap: wrap; gap: 8px; align-content: center; max-width: 300px; }
.tags span { font-size: 13px; color: var(--text2); background: var(--surface); border: 1px solid var(--line); border-radius: 6px; padding: 5px 12px; }
.tags .ai { color: var(--accent); background: var(--accent-soft); border-color: transparent; }

.traces { display: flex; gap: 22px; align-items: center; }
.traces svg { width: 34px; height: 34px; color: var(--text); }

.list { font-family: var(--mono); font-size: 13px; color: var(--text2); display: grid; gap: 10px; }
.list .dim { color: var(--text3); }

.tree { font-family: var(--mono); font-size: 13px; line-height: 2; color: var(--text2); }
.tree .dim { color: var(--text3); }

/* Own everything (dark) --------------------------------------------------- */

.own { background: var(--dark-bg); color: var(--dark-text); margin-top: 140px; }
.own .wrap { padding-top: 112px; padding-bottom: 112px; }
.own .eyebrow { color: var(--dark-accent); }
.claims { display: grid; margin-top: 40px; }
.claims p {
  font-size: 42px;
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.15;
  padding: 28px 0;
  border-top: 1px solid var(--dark-line);
  text-wrap: balance;
}
.claims .muted { color: var(--dark-text3); }
.providers { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 48px; }
.providers span { font-family: var(--mono); font-size: 13px; color: var(--dark-text2); border: 1px solid var(--dark-line); border-radius: 6px; padding: 6px 12px; }
.providers .hi { color: var(--dark-accent); }

/* Install --------------------------------------------------------------- */

.install {
  padding-top: 120px;
  display: grid;
  grid-template-columns: 88px 1fr 1fr;
  gap: 56px;
}
.install .num { padding-top: 6px; }
.install h2 { font-size: 34px; font-weight: 600; letter-spacing: -0.025em; }
.install p { font-size: 16px; line-height: 1.55; color: var(--text2); max-width: 420px; margin-top: 16px; text-wrap: pretty; }
.install p + p { margin-top: 14px; }
.install p a { color: var(--text); border-bottom: 1px solid var(--line); }
.install p a:hover { border-bottom-color: var(--accent); }
.terminal {
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 2.1;
  color: var(--text2);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px 28px;
  align-self: start;
  overflow-x: auto;
}
.terminal .dim { color: var(--text3); }

/* Footer ---------------------------------------------------------------- */

.footer {
  margin-top: 120px;
  padding-top: 28px;
  padding-bottom: 40px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-by { display: flex; align-items: center; gap: 8px; color: var(--text3); font-size: 13px; }
.footer-by svg { width: 16px; height: 16px; color: var(--text3); opacity: 0.5; }
.footer-by a { color: var(--text2); border-bottom: 1px solid var(--line); }
.footer-links { display: flex; gap: 24px; font-size: 13px; }
.footer-links a { color: var(--text2); }

/* Motion ---------------------------------------------------------------- */

.in { animation: heroIn 600ms var(--ease) both; }
.in-1 { animation-delay: 60ms; }
.in-2 { animation-delay: 120ms; }
.in-3 { animation-delay: 180ms; }
.in-4 { animation-delay: 240ms; }
.in-demo { animation: heroIn 700ms var(--ease) 200ms both; }

[data-reveal].pending { opacity: 0; transform: translateY(16px); }
[data-reveal].shown { opacity: 1; transform: translateY(0); transition: opacity 600ms var(--ease), transform 600ms var(--ease); }

@keyframes heroIn { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: translateY(0); } }
@keyframes cardLoop {
  0% { opacity: 0; transform: translateY(12px) rotate(0deg) scale(1); }
  7% { opacity: 1; transform: translateY(0) rotate(0deg) scale(1); }
  42% { opacity: 1; transform: translateY(0) rotate(0deg) scale(1); }
  52% { opacity: 1; transform: translateY(0) rotate(-37deg) scale(0.16, 0.028); }
  54%, 100% { opacity: 0; transform: translateY(0) rotate(-37deg) scale(0.16, 0.028); }
}
@keyframes cardContentLoop { 0%, 40% { opacity: 1; } 45%, 100% { opacity: 0; } }
@keyframes glyphLoop { 0%, 51% { opacity: 0; transform: scale(0.85); } 55% { opacity: 1; transform: scale(1); } 86% { opacity: 1; transform: scale(1); } 94%, 100% { opacity: 0; transform: scale(1); } }
@keyframes savedLoop { 0%, 55% { opacity: 0; transform: translateY(4px); } 60% { opacity: 1; transform: translateY(0); } 86% { opacity: 1; transform: translateY(0); } 94%, 100% { opacity: 0; transform: translateY(0); } }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
  [data-reveal].pending { opacity: 1; transform: none; }
}

/* Responsive ------------------------------------------------------------ */

@media (max-width: 1024px) {
  .hero { grid-template-columns: 1fr 360px; gap: 48px; }
  .hero h1 { font-size: 60px; }
  .feature { grid-template-columns: 64px 1fr 320px; gap: 40px; }
  .install { grid-template-columns: 64px 1fr; }
  .install .terminal { grid-column: 2; }
  .claims p { font-size: 36px; }
}

@media (max-width: 820px) {
  :root { --gutter: 24px; }
  .hero { grid-template-columns: 1fr; gap: 48px; padding-top: 72px; }
  .hero h1 { font-size: clamp(40px, 11vw, 56px); letter-spacing: -0.035em; }
  .demo-stage { height: 300px; }
  .demo-card { width: min(300px, calc(100vw - 96px)); margin-left: max(-150px, calc((100vw - 96px) / -2)); }
  .features { padding-top: 96px; }
  .feature { grid-template-columns: 1fr; gap: 24px; padding: 48px 0; }
  .feature .num { order: -1; }
  .feature h2 { font-size: 28px; }
  .aside { justify-self: start; }
  .shot { width: min(280px, 70vw); }
  .own { margin-top: 96px; }
  .own .wrap { padding-top: 72px; padding-bottom: 72px; }
  .claims p { font-size: clamp(26px, 7vw, 34px); padding: 22px 0; }
  .install { grid-template-columns: 1fr; gap: 24px; padding-top: 88px; }
  .install .terminal { grid-column: auto; font-size: 13px; padding: 20px 22px; }
  .footer { margin-top: 88px; flex-direction: column; align-items: flex-start; }
}

@media (max-width: 420px) {
  .nav-links { gap: 20px; }
  .hero-actions { gap: 20px; }
  .traces { gap: 14px; }
  .traces svg { width: 28px; height: 28px; }
}