/*
  Grid Reference — static marketing site.
  Palette mirrors the app: shared/src/commonMain/kotlin/net/blerg/gridreference/Theme.kt
  Light and dark follow the system setting, exactly as in the app.
*/

:root {
  --bg: #F8F9F8;
  --grid-line: #EBEEEB;
  --green: #4CA46D;
  --green-deep: #3E8E62;
  --on-green: #0A1F13;
  --pill-bg: #DCEEE2;
  --pill-text: #2F7A50;
  --text: #1B1D1B;
  --muted: #5C6660;
  --card: #FFFFFF;
  --card-border: #E4E8E4;
  --chip-bg: #F0F2F0;
  --chip-text: #2C322D;
  --warn: #B26A00;
  --warn-bg: #FDF2DF;
  --shadow: 0 16px 40px rgba(27, 29, 27, 0.10);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111413;
    --grid-line: #1C211E;
    --green: #4FB077;
    --green-deep: #63BE8B;
    --on-green: #08130C;
    --pill-bg: #22352A;
    --pill-text: #93D9B0;
    --text: #E8ECE9;
    --muted: #98A09A;
    --card: #191D1B;
    --card-border: #282E2A;
    --chip-bg: #242A26;
    --chip-text: #D6DDD8;
    --warn: #E0A44B;
    --warn-bg: #2E2413;
    --shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* faint grid-paper backdrop, like the app screen */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 76px 76px;
}

img { max-width: 100%; }
::selection { background: var(--pill-bg); }
:focus-visible { outline: 2px solid var(--green); outline-offset: 2px; }

.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace; }
.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

.skip-link { position: absolute; left: -9999px; }
.skip-link:focus {
  left: 16px; top: 16px; z-index: 10;
  background: var(--card); color: var(--text);
  padding: 10px 16px; border-radius: 10px; border: 1px solid var(--card-border);
}

a { color: var(--green-deep); }

/* header */
.site-header {
  position: sticky; top: 0; z-index: 5;
  background: var(--bg); border-bottom: 1px solid var(--card-border);
}
.nav { display: flex; align-items: center; gap: 24px; padding: 14px 0; }
.brand {
  display: flex; align-items: center; gap: 10px;
  color: var(--text); text-decoration: none;
  font-weight: 800; letter-spacing: -0.01em; font-size: 17px;
}
.brand svg { display: block; border-radius: 7px; }
.nav-links { margin-left: auto; display: flex; gap: 24px; }
.nav-links a { color: var(--muted); text-decoration: none; font-weight: 600; font-size: 15px; }
.nav-links a:hover { color: var(--text); }
@media (max-width: 760px) { .nav-links { display: none; } }

/* buttons */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  background: var(--green); color: var(--on-green);
  font-weight: 700; padding: 13px 24px; border-radius: 999px;
  text-decoration: none; border: none;
}
.btn:hover { filter: brightness(1.06); }
.btn.small { padding: 9px 18px; font-size: 14px; }
.btn-ghost {
  display: inline-flex; align-items: center; gap: 9px;
  color: var(--text); background: var(--card); border: 1px solid var(--card-border);
  font-weight: 600; padding: 12px 22px; border-radius: 999px; text-decoration: none;
}
.btn-ghost:hover { border-color: var(--muted); }

.chip {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--chip-bg); color: var(--chip-text);
  border-radius: 999px; padding: 5px 13px;
  font-size: 13px; font-weight: 600; white-space: nowrap;
}

/* store badge */
.store {
  display: inline-flex; align-items: center; gap: 12px;
  background: var(--text); color: var(--bg);
  border-radius: 14px; padding: 10px 20px; text-decoration: none;
}
.store:hover { filter: brightness(1.08); }
.store .txt { line-height: 1.15; text-align: left; }
.store .txt small {
  display: block; font-size: 10px; font-weight: 600;
  letter-spacing: 0.09em; text-transform: uppercase; opacity: 0.72;
}
.store .txt b { font-size: 19px; font-weight: 750; letter-spacing: -0.01em; }
.store svg { flex: none; }

/* hero */
.hero { padding: 76px 0 48px; }
.hero-grid {
  display: grid; grid-template-columns: 1.05fr 0.95fr;
  gap: 48px; align-items: center;
}
@media (max-width: 940px) { .hero-grid { grid-template-columns: 1fr; } }
h1 {
  font-size: clamp(40px, 6vw, 62px); line-height: 1.04;
  letter-spacing: -0.03em; margin: 16px 0 18px; font-weight: 800;
}
.lede { font-size: 19px; color: var(--muted); max-width: 34em; margin: 0 0 30px; }
.lede .mono { color: var(--text); font-weight: 600; }
.cta-row { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.cta-row + .cta-row { margin-top: 22px; }

.phones { display: grid; grid-template-columns: 1fr; justify-items: center; }
.phone {
  margin: 0; width: 100%; max-width: 300px;
  background: var(--card); border: 1px solid var(--card-border);
  border-radius: 38px; padding: 10px; box-shadow: var(--shadow);
}
.phone picture { display: block; }
.phone img { display: block; width: 100%; height: auto; border-radius: 28px; }

/* sections */
section { padding: 60px 0; }
h2 {
  font-size: clamp(28px, 4vw, 40px); letter-spacing: -0.02em;
  margin: 0 0 10px; font-weight: 800;
}
.section-sub { color: var(--muted); max-width: 46em; margin: 0 0 36px; font-size: 17px; }

.features {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 16px;
}
.card { background: var(--card); border: 1px solid var(--card-border); border-radius: 20px; padding: 24px; }
.card h3 { margin: 14px 0 6px; font-size: 17px; letter-spacing: -0.01em; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.card .ico {
  width: 40px; height: 40px; border-radius: 12px;
  background: var(--pill-bg); color: var(--pill-text);
  display: grid; place-items: center;
}
.card .ico svg { width: 20px; height: 20px; }

/* how-it-works steps + demo */
.steps {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 16px;
}
.step h3 { margin: 12px 0 6px; font-size: 17px; }
.step p { margin: 0; color: var(--muted); font-size: 15px; }
.step .n {
  display: inline-block;
  font: 700 13px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color: var(--pill-text); background: var(--pill-bg);
  padding: 7px 11px; border-radius: 9px; letter-spacing: 0.06em;
}

.demo {
  background: var(--card); border: 1px solid var(--card-border);
  border-radius: 26px; padding: 40px 24px 44px; text-align: center;
  margin-top: 20px; box-shadow: var(--shadow);
}
.demo-letters {
  color: var(--green-deep); font-weight: 800;
  font-size: clamp(56px, 10vw, 96px); line-height: 1; letter-spacing: 0.01em;
}
.pill {
  display: inline-block; background: var(--pill-bg); color: var(--pill-text);
  border-radius: 999px; padding: 8px 18px; font-weight: 700;
  margin: 14px 0 18px; font-size: 15px;
}
.demo-figs {
  font-weight: 800; font-size: clamp(34px, 6vw, 56px); letter-spacing: 0.04em;
  display: flex; justify-content: center; gap: clamp(18px, 5vw, 48px);
}
.demo-sub { margin: 16px 0 0; color: var(--muted); font-size: 15px; }

.note {
  background: var(--warn-bg); color: var(--warn);
  border-radius: 14px; padding: 13px 18px; font-size: 14.5px; margin-top: 22px;
}

/* banner + footer */
.banner {
  background: var(--card); border: 1px solid var(--card-border);
  border-radius: 28px; padding: 44px;
  display: grid; grid-template-columns: 1fr auto; gap: 28px;
  align-items: center; box-shadow: var(--shadow);
}
@media (max-width: 760px) { .banner { grid-template-columns: 1fr; } }
.banner .section-sub { margin-bottom: 0; }

.site-footer { border-top: 1px solid var(--card-border); padding: 36px 0 44px; color: var(--muted); font-size: 14px; }
.footer-cols {
  display: flex; gap: 28px; flex-wrap: wrap;
  justify-content: space-between; align-items: baseline;
}
.footer-cols a { color: var(--muted); }
.footer-brand { font-weight: 800; color: var(--text); }
.fineprint { margin: 18px 0 0; font-size: 13px; max-width: 64em; }

/* privacy policy page */
.policy { max-width: 780px; margin: 0 auto; }
.policy .meta { color: var(--muted); font-size: 14px; margin: 6px 0 30px; }
.policy h2 { font-size: 23px; margin: 42px 0 10px; letter-spacing: -0.01em; }
.policy p, .policy li { color: var(--text); font-size: 15.5px; }
.policy p { margin: 0 0 12px; }
.policy ul { margin: 0 0 12px; padding-left: 22px; }
.policy li { margin-bottom: 6px; }
.policy .mono { font-size: 14px; }
.summary {
  background: var(--card); border: 1px solid var(--card-border);
  border-left: 4px solid var(--green);
  border-radius: 16px; padding: 20px 24px; margin: 8px 0;
}
.summary ul { margin: 8px 0 0; }
.page-head { padding: 56px 0 8px; }