/* landing.css — the public page at the root of the site.
 *
 * Shares the application's palette (see app.css) so the jump from the pitch to
 * the simulator doesn't feel like two different products. The ECG paper stays
 * light in both themes here too: a paramedic reads a printout.
 */

:root {
  --bg: #f4f5f7;
  --surface: #ffffff;
  --surface-2: #fbfbfc;
  --ink: #16181d;
  --ink-2: #4a5160;
  --ink-3: #767f91;
  --line: #dfe2e8;
  --accent: #0b5fa5;
  --accent-ink: #ffffff;
  --paper: #fff7f4;
  --radius: 10px;
  --sans: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --wrap: 1120px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14161a;
    --surface: #1c1f25;
    --surface-2: #23262d;
    --ink: #eceef2;
    --ink-2: #b3bac6;
    --ink-3: #8b93a1;
    --line: #333842;
    --accent: #4d9fe0;
    --accent-ink: #0b1620;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; }

a { color: var(--accent); }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }
.center { text-align: center; }

/* ---------------------------------------------------------------- nav */

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-right: auto;
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.brand-mark { color: var(--accent); display: flex; }

.nav-links { display: flex; align-items: center; gap: 20px; }
.nav-links a { color: var(--ink-2); text-decoration: none; font-size: 15px; }
.nav-links a:hover { color: var(--accent); }
.nav-links .btn { color: var(--accent-ink); }

@media (max-width: 720px) {
  .nav-links a:not(.btn) { display: none; }
}

/* -------------------------------------------------------------- buttons */

.btn {
  display: inline-block;
  padding: 9px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: transform .06s ease, box-shadow .15s ease, background .15s ease;
}
.btn:hover { box-shadow: 0 2px 10px rgba(11, 95, 165, .12); }
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}
.btn-primary:hover { box-shadow: 0 6px 20px rgba(11, 95, 165, .28); }

.btn-ghost { background: transparent; }

.btn-sm { padding: 7px 13px; font-size: 14px; }
.btn-lg { padding: 13px 24px; font-size: 17px; }

/* ---------------------------------------------------------------- hero */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.1fr);
  gap: 40px;
  align-items: center;
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 64px 20px 48px;
}

.eyebrow {
  margin: 0 0 12px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(30px, 4.4vw, 46px);
  line-height: 1.1;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

.lede { margin: 0 0 24px; font-size: 18px; color: var(--ink-2); }

.cta-row { display: flex; flex-wrap: wrap; gap: 12px; }
.cta-note { margin: 14px 0 0; font-size: 14px; color: var(--ink-3); }

.hero-figure {
  margin: 0;
  padding: 10px 10px 6px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 18px 40px rgba(16, 24, 40, .10);
}
.hero-figure img { display: block; width: 100%; border-radius: 4px; }
.hero-figure figcaption {
  padding: 8px 4px 2px;
  font-size: 13px;
  color: var(--ink-3);
}

@media (max-width: 900px) {
  /* minmax(0, …) rather than a bare 1fr: the hero image carries a width
   * attribute, and a plain fr track floors at its min-content width, which
   * pushes the whole page wider than a phone screen. */
  .hero { grid-template-columns: minmax(0, 1fr); gap: 32px; padding-top: 40px; }
}

/* --------------------------------------------------------------- bands */

.strip-band { background: var(--surface); border-block: 1px solid var(--line); }

.band-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  padding-block: 26px;
  text-align: center;
}
.band-grid strong {
  display: block;
  font-size: 34px;
  line-height: 1.1;
  color: var(--accent);
  letter-spacing: -0.03em;
}
.band-grid span { font-size: 14px; color: var(--ink-2); }

@media (max-width: 640px) {
  .band-grid { grid-template-columns: 1fr; gap: 14px; }
}

.section { padding-block: 60px; }
.band { background: var(--surface); border-block: 1px solid var(--line); }

.section h2 {
  margin: 0 0 10px;
  font-size: clamp(24px, 3vw, 32px);
  letter-spacing: -0.02em;
}
.section-lede { margin: 0 0 28px; max-width: 62ch; color: var(--ink-2); }

/* --------------------------------------------------------------- cards */

.cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 26px;
}

@media (max-width: 720px) {
  .cards { grid-template-columns: 1fr; }
}

.card {
  padding: 22px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.card h3 { margin: 0 0 8px; font-size: 18px; letter-spacing: -0.01em; }
.card p { margin: 0; color: var(--ink-2); font-size: 15px; }

/* ------------------------------------------------------------- samples */

.samples {
  display: grid;
  gap: 18px;
  max-width: 860px;
  margin: 0 auto 32px;
}

.sample {
  margin: 0;
  padding: 10px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.sample img {
  display: block;
  width: 100%;
  border-radius: 4px;
  background: var(--paper);
}
.sample figcaption {
  padding: 10px 4px 2px;
  font-size: 14px;
  color: var(--ink-2);
}

/* --------------------------------------------------------------- steps */

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 24px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}
.steps li { margin: 0; }
.step-n {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  margin-bottom: 10px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 700;
  font-size: 15px;
}
.steps h3 { margin: 0 0 6px; font-size: 18px; }
.steps p { margin: 0; color: var(--ink-2); font-size: 15px; }

/* ------------------------------------------------------------- two-col */

.two-col {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
  margin-top: 20px;
}
.two-col p { margin: 0 0 14px; color: var(--ink-2); }

/* ------------------------------------------------------------ cta band */

.cta-band {
  background: var(--surface);
  border-top: 1px solid var(--line);
}
.cta-band .lede { margin-bottom: 22px; }
.cta-band .cta-note { max-width: 60ch; margin: 18px auto 0; }

/* -------------------------------------------------------------- footer */

.footer {
  padding-block: 26px;
  background: var(--bg);
  border-top: 1px solid var(--line);
}
.footer-inner { display: grid; gap: 10px; }
.disclaimer {
  margin: 0;
  max-width: 78ch;
  font-size: 14px;
  color: var(--ink-2);
}
.colophon { margin: 0; font-size: 14px; color: var(--ink-3); }