/* ========== LucIA Med — Design Tokens ========== */
:root {
  /* Type */
  --font-display: "Geist", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-sans: "Manrope", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* Palette: COBALT (default) */
  --c-bg: #FBFBF8;
  --c-bg-elev: #FFFFFF;
  --c-ink: #0A1F3D;
  --c-ink-soft: #3A4A66;
  --c-muted: #6B7990;
  --c-line: #E5E8F0;
  --c-line-soft: #EFF1F6;
  --c-primary: #0A2540;
  --c-primary-ink: #FFFFFF;
  --c-accent: #2A6FDB;
  --c-accent-soft: #E8F0FF;
  --c-mint: #34D399;
  --c-warn: #F59E0B;

  /* Spacing rhythm */
  --maxw: 1240px;
  --pad-x: clamp(20px, 4vw, 56px);
  --gap-section: clamp(72px, 10vw, 140px);

  /* Radii / shadow */
  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 22px;
  --r-xl: 32px;
  --shadow-card: 0 1px 0 rgba(10,31,61,.04), 0 12px 36px -16px rgba(10,31,61,.18);
  --shadow-lift: 0 1px 0 rgba(10,31,61,.04), 0 28px 60px -28px rgba(10,31,61,.30);
}

/* ----- Palette: MINT ----- */
[data-palette="mint"] {
  --c-bg: #F6FBF8;
  --c-bg-elev: #FFFFFF;
  --c-ink: #0F2A22;
  --c-ink-soft: #2E4A40;
  --c-muted: #5E7670;
  --c-line: #DDEBE3;
  --c-line-soft: #ECF3EE;
  --c-primary: #115E51;
  --c-primary-ink: #FFFFFF;
  --c-accent: #14B8A6;
  --c-accent-soft: #E5F6F2;
  --c-mint: #34D399;
}

/* ----- Palette: NAVY + MINT (mix) ----- */
[data-palette="duo"] {
  --c-bg: #F7F9F8;
  --c-bg-elev: #FFFFFF;
  --c-ink: #07182E;
  --c-ink-soft: #2A3D55;
  --c-muted: #61728A;
  --c-line: #E1E7EA;
  --c-line-soft: #ECF1F1;
  --c-primary: #07182E;
  --c-primary-ink: #FFFFFF;
  --c-accent: #14B8A6;
  --c-accent-soft: #E0F6F1;
  --c-mint: #34D399;
}

/* ========== Base ========== */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
#root { position: relative; isolation: isolate; }
body {
  font-family: var(--font-sans);
  background: var(--c-bg);
  color: var(--c-ink);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-size: 17px;
  line-height: 1.55;
  letter-spacing: -0.005em;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }

.serif { font-family: var(--font-display); font-weight: 600; letter-spacing: -0.03em; }
.mono { font-family: var(--font-mono); }

/* Hide scrollbar on demo lists */
.no-scrollbar::-webkit-scrollbar { display: none; }
.no-scrollbar { scrollbar-width: none; }

/* ========== Layout ========== */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--pad-x); }
.section { padding: var(--gap-section) 0; }

/* ========== Nav ========== */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--c-bg) 80%, transparent);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s, background .2s;
}
.nav.is-scrolled { border-color: var(--c-line); }
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.nav-links { display: flex; gap: 32px; }
.nav-links a {
  font-size: 14px; color: var(--c-ink-soft); font-weight: 500;
  transition: color .15s;
}
.nav-links a:hover { color: var(--c-ink); }
@media (max-width: 760px) { .nav-links { display: none; } }

/* ========== Logo ========== */
.logo {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-display);
  font-size: 19px; font-weight: 600;
  letter-spacing: -0.035em; color: var(--c-ink);
}
.logo-mark {
  width: 28px; height: 28px; border-radius: 8px;
  background: var(--c-primary); color: var(--c-primary-ink);
  display: grid; place-items: center;
  position: relative; overflow: hidden;
}
.logo-mark svg { width: 16px; height: 16px; }

/* ========== Buttons ========== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 22px; border-radius: 999px;
  font-size: 15px; font-weight: 600; letter-spacing: -0.005em;
  transition: transform .15s, box-shadow .2s, background .15s;
  white-space: nowrap;
}
.btn-primary {
  background: var(--c-primary); color: var(--c-primary-ink);
  box-shadow: 0 1px 0 rgba(0,0,0,.04), 0 8px 22px -10px var(--c-primary);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 1px 0 rgba(0,0,0,.04), 0 14px 28px -12px var(--c-primary); }
.btn-ghost {
  background: transparent; color: var(--c-ink);
  border: 1px solid var(--c-line);
}
.btn-ghost:hover { border-color: var(--c-ink); }
.btn-sm { padding: 10px 16px; font-size: 13.5px; }

/* ========== Eyebrow ========== */
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12.5px; font-weight: 600; letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-accent);
}
.eyebrow .dot {
  width: 6px; height: 6px; border-radius: 999px; background: var(--c-accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--c-accent) 18%, transparent);
}

/* ========== Headings ========== */
.h-display {
  font-family: var(--font-display);
  font-size: clamp(44px, 6.6vw, 82px);
  line-height: 1.0;
  letter-spacing: -0.045em;
  font-weight: 600;
  color: var(--c-ink);
  margin: 0;
}
.h-display em { font-style: normal; color: var(--c-accent); font-weight: 600; }
.h-section {
  font-family: var(--font-display);
  font-size: clamp(32px, 4.2vw, 52px);
  line-height: 1.06;
  letter-spacing: -0.035em;
  font-weight: 600;
  color: var(--c-ink);
  margin: 0;
}
.h-section em { font-style: normal; color: var(--c-accent); font-weight: 600; }
.lede {
  font-size: clamp(17px, 1.4vw, 19px);
  line-height: 1.5;
  color: var(--c-ink-soft);
  max-width: 56ch;
}

/* ========== Section header ========== */
.section-head {
  display: flex; flex-direction: column; gap: 18px;
  max-width: 760px;
  margin-bottom: 56px;
}

/* ========== Feature cards ========== */
.feat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
@media (max-width: 960px) { .feat-grid { grid-template-columns: 1fr; } }

.feat-card {
  background: var(--c-bg-elev);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  padding: 32px;
  display: flex; flex-direction: column; gap: 16px;
  position: relative;
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.feat-card:hover {
  border-color: color-mix(in srgb, var(--c-accent) 40%, var(--c-line));
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}
.feat-card .icon-wrap {
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--c-accent-soft); color: var(--c-accent);
  display: grid; place-items: center;
}
.feat-card h3 {
  font-family: var(--font-display);
  font-size: 21px;
  line-height: 1.25;
  letter-spacing: -0.025em;
  font-weight: 600;
  margin: 0;
  color: var(--c-ink);
}
.feat-card p {
  margin: 0; color: var(--c-ink-soft); font-size: 15.5px; line-height: 1.55;
}
.feat-card .num {
  position: absolute; top: 28px; right: 28px;
  font-family: var(--font-mono); font-size: 11px;
  color: var(--c-muted); letter-spacing: 0.08em;
}

/* ========== Footer ========== */
.footer {
  border-top: 1px solid var(--c-line);
  padding: 64px 0 40px;
  margin-top: var(--gap-section);
}
.footer-grid {
  display: grid; gap: 48px;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
}
@media (max-width: 880px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.footer h5 {
  font-size: 12px; text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--c-muted); margin: 0 0 14px;
}
.footer a {
  display: block; padding: 5px 0;
  font-size: 14.5px; color: var(--c-ink-soft);
}
.footer a:hover { color: var(--c-ink); }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 12px;
  margin-top: 56px; padding-top: 24px;
  border-top: 1px solid var(--c-line);
  font-size: 13px; color: var(--c-muted);
}

/* ========== Section dividers / pill ========== */
.pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px 6px 8px;
  background: var(--c-bg-elev);
  border: 1px solid var(--c-line);
  border-radius: 999px;
  font-size: 12.5px; color: var(--c-ink-soft); font-weight: 500;
}
.pill .blip {
  width: 6px; height: 6px; border-radius: 999px; background: var(--c-mint);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--c-mint) 22%, transparent);
  animation: blip 2s infinite;
}
@keyframes blip {
  0%,100% { opacity: 1; }
  50% { opacity: .4; }
}