/* Root tokens */
:root {
  --bg: #0b0b0c;
  --surface: #121214;
  --surface-2: #17181b;
  --text: #f4f5f7;
  --muted: #a5a7ae;
  --brand: #67e8f9;      /* accent cyan */
  --brand-2: #c084fc;    /* accent purple */
  --ok: #22c55e;

  --radius: 16px;
  --shadow: 0 10px 30px rgba(0,0,0,.35);

  /* Fluid type */
  --step--1: clamp(.88rem, .82rem + .25vw, 1rem);
  --step-0: clamp(1rem, .95rem + .3vw, 1.125rem);
  --step-1: clamp(1.125rem, 1rem + .6vw, 1.375rem);
  --step-2: clamp(1.35rem, 1.1rem + 1vw, 1.75rem);
  --step-3: clamp(1.7rem, 1.3rem + 1.6vw, 2.25rem);
  --step-4: clamp(2.1rem, 1.6rem + 2.2vw, 3rem);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #ffffff;
    --surface: #f7f8fb;
    --surface-2: #eef0f5;
    --text: #0c0d10;
    --muted: #4c4f57;
  }
}

/* Base */
*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: linear-gradient(180deg, var(--bg), var(--surface));
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Inter, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  font-size: var(--step-0);
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}

img { display: block; max-width: 100%; height: auto; border-radius: calc(var(--radius) - 4px); }
svg { width: 1.25rem; height: 1.25rem; fill: currentColor; }
a { color: inherit; text-decoration: none; }
p { margin: .75rem 0 1rem; color: var(--text); }
h1, h2, h3 { line-height: 1.15; margin: 0 0 .5em; letter-spacing: -0.02em; }
h1 { font-size: var(--step-4); }
h2 { font-size: var(--step-3); }
h3 { font-size: var(--step-2); }

.lead { font-size: var(--step-1); color: var(--muted); max-width: 60ch; }

/* Layout helpers */
.container { width: min(1120px, 92vw); margin-inline: auto; }
.section { padding: 5rem 0; }
.section--alt { background: var(--surface); }
.section-head { margin-bottom: 2rem; }
.grid { display: grid; gap: 1.5rem; }
.grid--2 { grid-template-columns: 1.1fr .9fr; align-items: center; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }

@media (max-width: 900px) {
  .grid--2, .grid--3 { grid-template-columns: 1fr; }
}

/* Accessibility */
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: absolute; left: -9999px; top: auto; }
.skip-link:focus { left: 1rem; top: 1rem; background: var(--brand-2); color: #000; padding: .5rem .75rem; border-radius: .5rem; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 10; backdrop-filter: saturate(140%) blur(8px); background: color-mix(in srgb, var(--bg) 80%, transparent); border-bottom: 1px solid color-mix(in srgb, var(--text) 10%, transparent); }
.site-header .container { display: grid; grid-template-columns: 1fr auto auto; align-items: center; gap: 1rem; padding: .85rem 0; }

.logo { display: inline-flex; gap: .6rem; align-items: center; font-weight: 700; }
.logo span { font-size: 1.05rem; letter-spacing: .2px; }

.nav ul { display: flex; gap: 1rem; list-style: none; margin: 0; padding: 0; }
.nav a { padding: .5rem .65rem; border-radius: .5rem; color: var(--muted); }
.nav a:hover { color: var(--text); background: color-mix(in srgb, var(--text) 10%, transparent); }

.header-cta .btn { white-space: nowrap; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: .8rem 1rem; border-radius: .9rem; font-weight: 600; border: 1px solid transparent; box-shadow: var(--shadow); transition: transform .15s ease, box-shadow .15s ease; }
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); box-shadow: 0 2px 10px rgba(0,0,0,.25); }

.btn--primary { background: linear-gradient(135deg, var(--brand), var(--brand-2)); color: #0a0a0a; }
.btn--secondary { background: var(--surface-2); border-color: color-mix(in srgb, var(--text) 10%, transparent); }
.btn--ghost { background: transparent; border-color: color-mix(in srgb, var(--text) 20%, transparent); }

/* Hero */
.hero { padding: 6rem 0 4rem; }
.hero .lead { margin-top: .5rem; }
.actions { display: flex; gap: .75rem; margin: 1rem 0 1.25rem; flex-wrap: wrap; }
.trust { display: flex; gap: 1rem; list-style: none; padding: 0; margin: .5rem 0 0; color: var(--muted); }
.trust li::before { content: "✓"; margin-right: .35rem; color: var(--ok); }
.hero-media .mockup { background: var(--surface); padding: .75rem; border-radius: var(--radius); border: 1px solid color-mix(in srgb, var(--text) 8%, transparent); box-shadow: var(--shadow); }
.accent { background: linear-gradient(135deg, var(--brand), var(--brand-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* Cards */
.cards { margin-top: 1rem; }
.card { display: grid; gap: 1rem; padding: 1.25rem; background: var(--surface); border-radius: var(--radius); border: 1px solid color-mix(in srgb, var(--text) 10%, transparent); box-shadow: var(--shadow); }
.card-top p { color: var(--muted); }
.card-list { list-style: none; padding: 0; margin: 0; display: grid; gap: .5rem; color: var(--muted); }
.card .btn { margin-top: .5rem; }

/* About */
.bullets { list-style: none; padding: 0; display: grid; gap: .4rem; color: var(--muted); }
.portrait { border-radius: var(--radius); overflow: hidden; background: var(--surface); padding: .75rem; border: 1px solid color-mix(in srgb, var(--text) 8%, transparent); box-shadow: var(--shadow); }
.portrait figcaption { color: var(--muted); font-size: var(--step--1); margin-top: .4rem; }

/* Quotes */
.quotes { margin-top: 1rem; }
.quote { background: var(--surface); border: 1px solid color-mix(in srgb, var(--text) 10%, transparent); padding: 1.1rem 1.2rem; border-radius: var(--radius); box-shadow: var(--shadow); }
.quote p { font-size: var(--step-1); }
.quote cite { color: var(--muted); font-style: normal; }

/* CTA */
.cta { padding: 4rem 0; background: radial-gradient(60% 100% at 50% 0%, color-mix(in srgb, var(--brand-2) 14%, transparent), transparent), var(--surface); border-top: 1px solid color-mix(in srgb, var(--text) 10%, transparent); }
.signup { display: grid; grid-template-columns: 1fr auto; gap: .6rem; max-width: 650px; margin: 1rem auto 0; }
.signup input { width: 100%; padding: .9rem 1rem; border-radius: .8rem; background: var(--surface-2); border: 1px solid color-mix(in srgb, var(--text) 12%, transparent); color: var(--text); }
.signup button { padding-inline: 1.25rem; }

/* Footer */
.site-footer { padding: 2.5rem 0; background: var(--bg); border-top: 1px solid color-mix(in srgb, var(--text) 10%, transparent); }
.footer-grid { display: grid; gap: 1.5rem; grid-template-columns: 1.3fr 1fr 1.2fr; align-items: start; }
.logo--foot { opacity: .95; }
.foot-note { color: var(--muted); margin-top: .35rem; }
.foot-links { list-style: none; display: grid; gap: .5rem; padding: 0; margin: 0; }
.foot-sub label { display: block; margin-bottom: .4rem; color: var(--muted); }
.foot-sub .row { display: grid; grid-template-columns: 1fr auto; gap: .5rem; }
.foot-sub input { padding: .8rem 1rem; border-radius: .75rem; background: var(--surface); border: 1px solid color-mix(in srgb, var(--text) 12%, transparent); color: var(--text); }

@media (max-width: 900px) {
  .site-header .container { grid-template-columns: 1fr auto; }
  .header-cta { display: none; } /* keep header clean on mobile */
  .hero { padding-top: 4.5rem; }
  .footer-grid { grid-template-columns: 1fr; }
}

/* Motion respect */
.reduced-motion * { transition: none !important; animation: none !important; }