/* Caria Labs — shared stylesheet
   Aesthetic: deep cinematic. Inspired by Anthropic, OpenAI, DeepMind.
   Color system: near-black canvas, warm paper accent, single amber accent.
*/

:root {
  /* Tokens (default — Tweaks can override at runtime) */
  --bg: #0b0b0c;
  --bg-elev: #111113;
  --bg-card: #131316;
  --paper: #f5f0e6;
  --paper-dim: #e9e2d3;
  --ink: #f6f3ec;
  --ink-dim: rgba(246, 243, 236, 0.62);
  --ink-mute: rgba(246, 243, 236, 0.42);
  --line: rgba(246, 243, 236, 0.09);
  --line-strong: rgba(246, 243, 236, 0.18);
  --accent: #d97f4a;        /* Anthropic-ish amber */
  --accent-ink: #2a1a10;
  --accent-soft: rgba(217, 127, 74, 0.16);
  --success: #7fb28a;
  --warn: #e0b04a;

  /* Type */
  --font-display: "Fraunces", "Times New Roman", ui-serif, serif;
  --font-body: "Inter Tight", "Inter", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Rhythm */
  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 18px;
  --radius-xl: 28px;
  --pad: clamp(20px, 3vw, 40px);
  --maxw: 1320px;
  --shadow-lg: 0 30px 80px -40px rgba(0,0,0,0.8), 0 2px 6px rgba(0,0,0,0.3);
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-feature-settings: "ss01","ss02","cv11";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  line-height: 1.5;
}
body {
  /* Subtle film grain + radial warm glow at top */
  background:
    radial-gradient(1200px 700px at 70% -10%, rgba(217,127,74,0.08), transparent 60%),
    radial-gradient(1400px 900px at -10% 10%, rgba(120,90,60,0.05), transparent 60%),
    var(--bg);
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

/* Container */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--pad);
}

/* Type scale */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-mute);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: "";
  width: 22px; height: 1px;
  background: var(--ink-mute);
}
.eyebrow.no-rule::before { display: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.02;
  margin: 0;
}
.display {
  font-size: clamp(44px, 6.2vw, 92px);
  font-weight: 300;
  letter-spacing: -0.035em;
  line-height: 0.98;
}
.h1 { font-size: clamp(36px, 4.6vw, 64px); letter-spacing: -0.03em; }
.h2 { font-size: clamp(28px, 3.2vw, 44px); }
.h3 { font-size: clamp(20px, 1.6vw, 26px); }
.kicker { font-family: var(--font-mono); font-size: 12px; letter-spacing: .1em; color: var(--ink-mute); text-transform: uppercase; }
.lede { font-size: clamp(17px, 1.3vw, 19px); color: var(--ink-dim); line-height: 1.55; max-width: 62ch; }
.mono { font-family: var(--font-mono); font-size: 12.5px; letter-spacing: 0.01em; }

em.italic, .italic {
  font-style: italic;
  font-family: var(--font-display);
  font-weight: 300;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.005em;
  border: 1px solid var(--line-strong);
  color: var(--ink);
  background: transparent;
  transition: all 200ms cubic-bezier(.2,.7,.2,1);
  cursor: pointer;
}
.btn:hover { background: rgba(246,243,236,0.06); border-color: rgba(246,243,236,0.35); }
.btn.primary {
  background: var(--paper);
  color: #1a1511;
  border-color: var(--paper);
}
.btn.primary:hover { background: #fff; transform: translateY(-1px); }
.btn.accent {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: var(--accent);
}
.btn.accent:hover { filter: brightness(1.06); transform: translateY(-1px); }
.btn .arrow {
  display: inline-block;
  transition: transform 250ms ease;
}
.btn:hover .arrow { transform: translateX(3px); }

/* Top nav */
.topnav {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px) saturate(130%);
  -webkit-backdrop-filter: blur(14px) saturate(130%);
  background: rgba(11,11,12,0.68);
  border-bottom: 1px solid var(--line);
}
.topnav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 24px;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: -0.02em;
  font-weight: 400;
}
.logo .mark {
  width: 26px; height: 26px;
  border-radius: 6px;
  background: linear-gradient(135deg, var(--accent) 0%, #8a4a2a 100%);
  display: grid; place-items: center;
  color: #fff; font-family: var(--font-mono); font-weight: 600; font-size: 12px;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.08) inset, 0 2px 10px rgba(217,127,74,0.25);
}
.logo em { font-style: normal; color: var(--ink-dim); font-size: 12px; font-family: var(--font-mono); margin-left: 4px; letter-spacing: .06em; text-transform: uppercase;}
.navlinks {
  display: flex; align-items: center; gap: 4px;
  font-size: 14px;
}
.navlinks a, .navlinks button.navbtn {
  padding: 8px 14px;
  border-radius: 8px;
  color: var(--ink-dim);
  transition: color 180ms ease, background 180ms ease;
  display: inline-flex; align-items: center; gap: 6px;
}
.navlinks a:hover, .navlinks button.navbtn:hover { color: var(--ink); background: rgba(246,243,236,0.04); }
.navlinks a.active { color: var(--ink); }
.navlinks .caret { font-size: 9px; opacity: .6; margin-top: 1px; }
.nav-right { display: flex; align-items: center; gap: 12px; }

/* Mega menu */
.mega-wrap { position: relative; }
.mega {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%; transform: translateX(-50%) translateY(-8px);
  width: min(920px, 92vw);
  background: rgba(19,19,22,0.96);
  backdrop-filter: blur(20px);
  border: 1px solid var(--line-strong);
  border-radius: 16px;
  padding: 20px;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease, transform 180ms ease;
  box-shadow: var(--shadow-lg);
}
.mega-wrap:hover .mega, .mega-wrap.open .mega {
  opacity: 1; pointer-events: auto; transform: translateX(-50%) translateY(0);
}
.mega-col h4 { font-family: var(--font-mono); font-size: 10px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-mute); margin-bottom: 10px; font-weight: 500; }
.mega-item {
  display: block;
  padding: 10px 12px;
  border-radius: 10px;
  margin-bottom: 2px;
}
.mega-item:hover { background: rgba(246,243,236,0.04); }
.mega-item .t { font-size: 14px; color: var(--ink); letter-spacing: -0.01em; }
.mega-item .d { font-size: 12px; color: var(--ink-mute); margin-top: 2px; line-height: 1.4; }
.mega-feature {
  background: linear-gradient(180deg, rgba(217,127,74,0.10), rgba(217,127,74,0.03));
  border: 1px solid rgba(217,127,74,0.2);
  border-radius: 12px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 220px;
  overflow: hidden;
  position: relative;
}
.mega-feature .tag { font-family: var(--font-mono); font-size: 10px; color: var(--accent); letter-spacing: .14em; text-transform: uppercase; }
.mega-feature h5 { font-family: var(--font-display); font-size: 22px; letter-spacing: -0.02em; line-height: 1.05; margin: 10px 0 8px; }
.mega-feature p { font-size: 12.5px; color: var(--ink-dim); margin: 0; line-height: 1.5; }

/* Sections */
section { padding: clamp(72px, 10vw, 140px) 0; position: relative; }
.section-head {
  display: grid; grid-template-columns: 1fr 1.4fr; gap: 48px;
  align-items: end;
  margin-bottom: 64px;
}
@media (max-width: 900px) { .section-head { grid-template-columns: 1fr; gap: 20px; } }
.section-head .lede { max-width: 54ch; }
.divider {
  height: 1px; background: var(--line); margin: 0 auto;
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: border-color 220ms ease, transform 220ms ease, background 220ms ease;
}
.card:hover { border-color: var(--line-strong); }
.card h3 { margin-bottom: 10px; }

/* Footer */
footer {
  border-top: 1px solid var(--line);
  padding: 80px 0 36px;
  background: linear-gradient(180deg, transparent, rgba(0,0,0,0.3));
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 60px;
}
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.footer-grid h5 { font-family: var(--font-mono); font-size: 10px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-mute); margin: 0 0 14px; font-weight: 500; }
.footer-grid a, .footer-grid p { font-size: 14px; color: var(--ink-dim); display: block; margin-bottom: 8px; }
.footer-grid a:hover { color: var(--ink); }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 28px;
  border-top: 1px solid var(--line);
  font-size: 12px; color: var(--ink-mute);
  font-family: var(--font-mono);
  letter-spacing: .04em;
}
.footer-wordmark {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(60px, 12vw, 180px);
  letter-spacing: -0.05em;
  line-height: 0.9;
  color: transparent;
  -webkit-text-stroke: 1px rgba(246,243,236,0.18);
  margin: 40px 0 20px;
  user-select: none;
}

/* Utility */
.row { display: flex; gap: 12px; flex-wrap: wrap; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
@media (max-width: 900px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

.tag {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 10px;
  background: rgba(246,243,236,0.05);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-dim);
  letter-spacing: .02em;
}
.tag .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 8px var(--accent); }

/* Animated underline link */
.ulink {
  position: relative;
  color: var(--ink);
  display: inline-flex; align-items: center; gap: 8px;
  padding-bottom: 2px;
}
.ulink::after {
  content: ""; position: absolute; left: 0; bottom: -2px;
  height: 1px; width: 100%;
  background: currentColor;
  transform-origin: right;
  transform: scaleX(1);
  transition: transform 380ms cubic-bezier(.2,.7,.2,1);
}
.ulink:hover::after { transform-origin: left; }

/* Scroll reveal */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity 700ms ease, transform 700ms cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: translateY(0); }

/* ── Mobile navigation ──────────────────────────────── */
@media (max-width: 900px) {
  .navlinks { display: none; }
  .desktop-cta { display: none !important; }
}

.nav-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px; height: 40px;
  border-radius: 8px;
  border: 1px solid var(--line-strong);
  background: transparent;
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
  -webkit-tap-highlight-color: transparent;
}
.nav-burger span {
  display: block;
  width: 18px; height: 1.5px;
  background: var(--ink);
  border-radius: 2px;
}
@media (max-width: 900px) {
  .nav-burger { display: flex; }
}

.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 999;
  pointer-events: none;
  visibility: hidden;
}
.mobile-nav.open {
  pointer-events: auto;
  visibility: visible;
}
.mobile-nav-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.6);
  opacity: 0;
  transition: opacity 280ms ease;
}
.mobile-nav.open .mobile-nav-backdrop { opacity: 1; }

.mobile-nav-panel {
  position: absolute;
  top: 0; right: 0;
  height: 100%;
  width: min(88vw, 300px);
  background: #0f0f11;
  border-left: 1px solid var(--line-strong);
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 300ms cubic-bezier(.2,.7,.2,1);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}
.mobile-nav.open .mobile-nav-panel { transform: translateX(0); }

.mobile-nav-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  height: 68px;
  border-bottom: 1px solid var(--line);
  flex-shrink: 0;
}
.mobile-nav-head .logo { font-size: 17px; }
.mobile-nav-head .logo em { display: none; }

.mobile-nav-close {
  width: 36px; height: 36px;
  border-radius: 8px;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--ink-dim);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  -webkit-tap-highlight-color: transparent;
  flex-shrink: 0;
}
.mobile-nav-close:hover { color: var(--ink); background: rgba(246,243,236,0.06); }

.mobile-nav-links {
  padding: 8px 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.mobile-navitem {
  display: block;
  padding: 15px 4px;
  font-size: 16px;
  color: var(--ink-dim);
  border-bottom: 1px solid var(--line);
  letter-spacing: -0.01em;
}
.mobile-navitem:hover, .mobile-navitem.active { color: var(--ink); }

.mobile-nav-footer {
  padding: 20px 16px 32px;
  border-top: 1px solid var(--line);
  flex-shrink: 0;
}

/* ── Mobile section padding ─────────────────────────── */
@media (max-width: 767px) {
  section { padding: 48px 0; }
}

/* ── Mobile typography ──────────────────────────────── */
@media (max-width: 600px) {
  .display { font-size: clamp(32px, 8.5vw, 92px); }
  .h1 { font-size: clamp(26px, 7vw, 64px); }
}

/* ── Mobile footer ──────────────────────────────────── */
@media (max-width: 600px) {
  .footer-grid { grid-template-columns: 1fr !important; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 8px; }
}

/* Tweaks panel */
.tweaks-panel {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 260px;
  background: rgba(19,19,22,0.96);
  backdrop-filter: blur(20px);
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  padding: 16px;
  z-index: 200;
  display: none;
  box-shadow: var(--shadow-lg);
}
.tweaks-panel.open { display: block; }
.tweaks-panel h4 { font-family: var(--font-mono); font-size: 10px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-mute); margin: 0 0 12px; font-weight: 500; }
.tweak-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 10px; font-size: 12px; }
.tweak-row .label { color: var(--ink-dim); font-family: var(--font-mono); }
.swatches { display: flex; gap: 6px; }
.swatches button {
  width: 22px; height: 22px; border-radius: 6px; border: 1px solid var(--line-strong); cursor: pointer;
}
.swatches button.active { outline: 2px solid var(--ink); outline-offset: 2px; }
.seg { display: flex; border: 1px solid var(--line-strong); border-radius: 8px; overflow: hidden; }
.seg button { padding: 4px 10px; font-size: 11px; font-family: var(--font-mono); color: var(--ink-dim); }
.seg button.active { background: var(--paper); color: #1a1511; }