/* FirnOS marketing page. Glacier palette as in the app's product default (preliminary). */
:root {
  --primary: #2f6f8f;
  --primary-dark: #255a75;
  --accent: #4a9cc2;
  --action: #1f3a5f;
  --action-dark: #162b47;
  --tint: #eaf4f8;
  --tint-line: #b9d9e6;
  --ink: #0f1720;
  --muted: #5b6672;
  --line: #e3e8ec;
  --surface: #ffffff;
  --canvas: #f7fafb;
  --radius: 14px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --primary: #6bb3d6;
    --primary-dark: #4a9cc2;
    --accent: #8cc7e3;
    --action: #8cc7e3;
    --action-dark: #b9d9e6;
    --tint: #10212c;
    --tint-line: #1f3a4a;
    --ink: #e8eef2;
    --muted: #9aa8b3;
    --line: #22313c;
    --surface: #111a21;
    --canvas: #0b1217;
    color-scheme: dark;
  }
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    "Segoe UI",
    Arial,
    sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}

.skip {
  position: absolute;
  left: -999px;
}
.skip:focus {
  left: 16px;
  top: 16px;
  z-index: 10;
  background: var(--surface);
  padding: 8px 12px;
}

.container {
  width: min(1120px, 100% - 32px);
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  background: color-mix(in srgb, var(--canvas) 82%, transparent);
  backdrop-filter: blur(14px) saturate(1.4);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
  border-bottom: 1px solid var(--line);
}
.header-row {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 64px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.01em;
  text-decoration: none;
}
.brand svg {
  color: var(--primary);
}
.nav {
  display: flex;
  gap: 22px;
  margin-left: auto;
  font-size: 15px;
}
.nav a {
  color: var(--muted);
  text-decoration: none;
}
.nav a:hover {
  color: var(--ink);
}
@media (max-width: 720px) {
  .nav {
    display: none;
  }
  .header-row .button {
    margin-left: auto;
  }
}

/* Buttons */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  transition:
    background 0.15s,
    border-color 0.15s,
    color 0.15s;
}
.button-primary {
  background: var(--action);
  color: #fff;
  box-shadow: 0 8px 24px -10px color-mix(in srgb, var(--action) 70%, transparent);
}
.button-primary:hover {
  background: var(--action-dark);
}
@media (prefers-color-scheme: dark) {
  .button-primary {
    color: #0b1217;
  }
}
.button-ghost {
  border: 1px solid var(--line);
  color: var(--ink);
  background: var(--surface);
}
.button-ghost:hover {
  border-color: var(--ink);
}

/* Hero */
.hero {
  padding: clamp(64px, 12vw, 140px) 0 clamp(56px, 9vw, 110px);
  background: radial-gradient(
      1200px 500px at 85% -10%,
      color-mix(in srgb, var(--accent) 22%, transparent),
      transparent 70%
    ),
    radial-gradient(
      900px 400px at -10% 110%,
      color-mix(in srgb, var(--primary) 14%, transparent),
      transparent 70%
    );
}
.eyebrow {
  margin: 0 0 12px;
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
h1 {
  margin: 0;
  max-width: 14ch;
  font-size: clamp(40px, 7.5vw, 76px);
  line-height: 1.04;
  letter-spacing: -0.02em;
}
.lead {
  max-width: 60ch;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: clamp(18px, 2vw, 21px);
}
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}
/* Sections */
.section {
  padding: clamp(56px, 9vw, 104px) 0;
}
.section-tint {
  background: var(--surface);
  border-block: 1px solid var(--line);
}
h2 {
  margin: 0;
  max-width: 24ch;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.15;
  letter-spacing: -0.015em;
}
.section-lead {
  max-width: 62ch;
  margin: 16px 0 0;
  color: var(--muted);
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 40px;
}
.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}
.card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}
.section-tint .card {
  background: var(--canvas);
}
.card h3 {
  margin: 12px 0 8px;
  font-size: 19px;
}
.grid-2 .card h3 {
  margin-top: 0;
}
.card p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}
/* Areas: what runs today, what comes next */
.area h3 {
  margin-top: 0;
  font-size: 22px;
}
.area h4 {
  margin: 22px 0 8px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.items {
  display: grid;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 15px;
}
.items li {
  position: relative;
  padding-left: 18px;
  color: var(--muted);
}
.items li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.6em;
  width: 7px;
  height: 7px;
  border: 1.5px solid var(--tint-line);
  border-radius: 50%;
}
.items-live li {
  color: var(--ink);
}
.items-live li::before {
  border-color: var(--primary);
  background: var(--primary);
}
.card .area-note {
  margin-top: 16px;
  font-size: 14px;
  font-style: italic;
}

.split {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: start;
}
@media (max-width: 820px) {
  .split {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}
.stack p {
  margin: 0;
  color: var(--muted);
}
.checks {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}
.checks li {
  position: relative;
  padding-left: 30px;
}
.checks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--tint);
  border: 1px solid var(--tint-line);
}
.checks li::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 9px;
  width: 5px;
  height: 8px;
  border: solid var(--primary);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.integrations {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin: 40px 0 0;
  padding: 0;
  list-style: none;
}
.integrations li {
  display: grid;
  gap: 2px;
  padding: 18px 20px;
  border: 1px dashed var(--tint-line);
  border-radius: var(--radius);
}
.integrations span {
  color: var(--muted);
  font-size: 15px;
}
.note {
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 15px;
}

/* Call to action */
.cta-box {
  padding: clamp(32px, 6vw, 56px);
  border-radius: 22px;
  background: linear-gradient(
    135deg,
    var(--action-dark),
    var(--action) 45%,
    var(--primary)
  );
  color: #fff;
  text-align: center;
}
.cta-box h2 {
  margin-inline: auto;
}
.cta-box p {
  max-width: 50ch;
  margin: 12px auto 28px;
  color: rgba(255, 255, 255, 0.82);
}
.cta-box .button-primary {
  background: #fff;
  color: var(--action-dark);
}
@media (prefers-color-scheme: dark) {
  .cta-box {
    background: linear-gradient(135deg, #10212c, #1f3a5f 45%, #2f6f8f);
  }
  .cta-box .button-primary {
    color: #162b47;
  }
}

/* Footer */
.site-footer {
  padding: 32px 0 calc(32px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}
.footer-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
}
.footer-nav {
  display: flex;
  gap: 18px;
}
.footer-nav a {
  color: var(--muted);
}