/* Helmer web theme.
   Palette mirrors Resources/Assets.xcassets in the app (light / dark pairs). */

:root {
  --deep-water: #0A3D62;
  --lake-blue: #1E6FA8;
  --teal: #0E8C8C;
  --foam: #E3EEF5;
  --zone-amber: #E8960C;
  --zone-coral: #E04E36;
  --safe-green: #23915F;
  --danger-red: #D02038;

  --bg: #FFFFFF;
  --surface: var(--foam);
  --text: #12242E;
  --text-dim: #526470;
  --rule: rgba(10, 61, 98, 0.14);
  --accent: var(--teal);
  --hero-from: #071E33;
  --hero-to: #0E8C8C;
  --shadow: 0 1px 3px rgba(7, 30, 51, 0.08), 0 8px 24px rgba(7, 30, 51, 0.06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --deep-water: #071E33;
    --lake-blue: #3E93CF;
    --teal: #2BD9D9;
    --foam: #16242E;
    --zone-amber: #FFB340;
    --zone-coral: #FF6B54;
    --safe-green: #35C98A;
    --danger-red: #FF4757;

    --bg: #071E33;
    --surface: var(--foam);
    --text: #E8F1F6;
    --text-dim: #9DB2C0;
    --rule: rgba(232, 241, 246, 0.14);
    --accent: var(--teal);
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.3);
  }
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI",
               Roboto, Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ---------- masthead ---------- */

.masthead {
  background: linear-gradient(180deg, var(--hero-from) 0%, var(--hero-to) 100%);
  color: #F0FAFC;
  padding: 0.9rem 0 0;
}

.bar {
  max-width: 52rem;
  margin: 0 auto;
  padding: 0 1.25rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: #F0FAFC;
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  text-decoration: none;
  margin-right: auto;
}

.brand img { width: 32px; height: 32px; border-radius: 8px; display: block; }

.nav { display: flex; gap: 1rem; font-size: 0.95rem; }

.nav a {
  color: rgba(240, 250, 252, 0.82);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
}

.nav a:hover { color: #FFF; }
.nav a[aria-current="page"] { color: #FFF; border-bottom-color: var(--zone-amber); }

.langs {
  display: flex;
  gap: 0.35rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.langs a, .langs span {
  padding: 0.15rem 0.45rem;
  border-radius: 6px;
  text-decoration: none;
  color: rgba(240, 250, 252, 0.7);
}

.langs a:hover { background: rgba(255, 255, 255, 0.14); color: #FFF; }
.langs span[aria-current="true"] { background: rgba(255, 255, 255, 0.22); color: #FFF; }

/* wave divider, echoing the three waves in the app icon */
.waves { display: block; width: 100%; height: 42px; margin-top: 1.1rem; }

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

.hero {
  background: linear-gradient(180deg, var(--hero-from) 0%, var(--hero-to) 100%);
  color: #F0FAFC;
  text-align: center;
  padding: 2.5rem 1.25rem 0;
  margin-top: -1px;
}

.hero-inner { max-width: 40rem; margin: 0 auto; }
.hero img { width: 96px; height: 96px; border-radius: 22px; box-shadow: var(--shadow); }
.hero h1 { font-size: 2.6rem; margin: 1rem 0 0.4rem; letter-spacing: -0.02em; }
.hero p { font-size: 1.15rem; color: rgba(240, 250, 252, 0.88); margin: 0 0 1.5rem; }

.badge {
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  padding: 0.2rem 0.7rem;
}

/* ---------- page ---------- */

main {
  max-width: 46rem;
  margin: 0 auto;
  padding: 2.25rem 1.25rem 3rem;
}

main.wide { max-width: 52rem; }

h1, h2, h3 { line-height: 1.25; letter-spacing: -0.01em; }
main > h1 { font-size: 2rem; margin: 0 0 0.35rem; }

h2 {
  font-size: 1.3rem;
  margin: 2.4rem 0 0.7rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--rule);
}

main > h2:first-of-type { border-top: none; padding-top: 0; }
h3 { font-size: 1.05rem; margin: 1.6rem 0 0.4rem; }

a { color: var(--accent); text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }

.lede { font-size: 1.1rem; color: var(--text-dim); margin-top: 0; }

.meta {
  font-size: 0.88rem;
  color: var(--text-dim);
  margin: 0 0 2rem;
  padding-bottom: 1.2rem;
  border-bottom: 1px solid var(--rule);
}

.meta code {
  background: var(--surface);
  padding: 0.1rem 0.35rem;
  border-radius: 5px;
  font-size: 0.9em;
}

ul, ol { padding-left: 1.3rem; }
li { margin: 0.35rem 0; }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.95rem;
}

th, td { text-align: left; padding: 0.55rem 0.7rem; border-bottom: 1px solid var(--rule); }
th { font-weight: 600; }
.table-scroll { overflow-x: auto; }

/* callouts, colour-coded like the app's zone overlays */

blockquote {
  margin: 1.5rem 0;
  padding: 0.9rem 1.1rem;
  background: var(--surface);
  border-left: 4px solid var(--accent);
  border-radius: 0 10px 10px 0;
}

blockquote p { margin: 0.4rem 0; }
blockquote.amber { border-left-color: var(--zone-amber); }
blockquote.coral { border-left-color: var(--zone-coral); }
blockquote.green { border-left-color: var(--safe-green); }

/* home feature grid */

.features {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
  display: grid;
  gap: 0.9rem;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
}

.features li {
  background: var(--surface);
  border-radius: 12px;
  padding: 1rem 1.1rem;
  margin: 0;
  box-shadow: var(--shadow);
}

.features b { display: block; margin-bottom: 0.15rem; }
.features span { color: var(--text-dim); font-size: 0.95rem; }

.cards { display: flex; flex-wrap: wrap; gap: 0.8rem; margin: 1.75rem 0; }

.card {
  flex: 1 1 13rem;
  display: block;
  background: var(--surface);
  border-radius: 12px;
  padding: 0.9rem 1.1rem;
  text-decoration: none;
  color: var(--text);
  box-shadow: var(--shadow);
}

.card:hover { outline: 2px solid var(--accent); }
.card b { color: var(--accent); }
.card span { display: block; color: var(--text-dim); font-size: 0.92rem; }

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

footer {
  border-top: 1px solid var(--rule);
  background: var(--surface);
  color: var(--text-dim);
  font-size: 0.9rem;
}

.footer-inner {
  max-width: 46rem;
  margin: 0 auto;
  padding: 1.6rem 1.25rem 2.4rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  justify-content: space-between;
}

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

@media (max-width: 34rem) {
  body { font-size: 16px; }
  .hero h1 { font-size: 2.1rem; }
  .brand { font-size: 1.05rem; }
}