/* WeightPilot public website: shared styles for every page. */

:root {
  --sky-top: #2a86d1;
  --sky-mid: #5fc2f5;
  --sky-bottom: #b9ecfb;
  --brand: #2f5fd6;
  --brand-deep: #1c3a9e;
  --accent: #3fa34d;
  --text: #1d2733;
  --muted: #5b6878;
  --surface: #ffffff;
  --page: #f4f8fb;
  --border: #dce5ee;
  --link: #2458c9;
  --header-text: #ffffff;
  --shadow: 0 1px 2px rgba(20, 40, 70, 0.06), 0 8px 24px rgba(20, 40, 70, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --sky-top: #0f3b5c;
    --sky-mid: #164a69;
    --sky-bottom: #17506f;
    --brand: #7aa2ff;
    --brand-deep: #a9c1ff;
    --accent: #6cc978;
    --text: #e6edf3;
    --muted: #9aa8b8;
    --surface: #162230;
    --page: #0e1822;
    --border: #253447;
    --link: #8fb4ff;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.35);
  }
}

:root[data-theme="dark"] {
  --sky-top: #0f3b5c;
  --sky-mid: #164a69;
  --sky-bottom: #17506f;
  --brand: #7aa2ff;
  --brand-deep: #a9c1ff;
  --accent: #6cc978;
  --text: #e6edf3;
  --muted: #9aa8b8;
  --surface: #162230;
  --page: #0e1822;
  --border: #253447;
  --link: #8fb4ff;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--page);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial,
    sans-serif;
  font-size: 17px;
  line-height: 1.6;
}

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

.wrap {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 16px;
}

/* Header */

.site-header {
  background: linear-gradient(180deg, var(--sky-top), var(--sky-mid));
}

.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 16px;
  padding-top: 14px;
  padding-bottom: 14px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--header-text);
  font-weight: 700;
  font-size: 20px;
  text-decoration: none;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.25);
}

.brand img {
  width: 40px;
  height: 40px;
  border-radius: 9px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.25);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
}

.site-nav a {
  color: var(--header-text);
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.25);
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* Hero (home page only) */

.hero {
  background: linear-gradient(180deg, var(--sky-mid), var(--sky-bottom) 45%, var(--page));
  padding: 40px 0 48px;
}

.hero .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 32px;
}

.hero-text {
  flex: 1 1 360px;
}

.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(30px, 6vw, 44px);
  line-height: 1.15;
  color: var(--brand-deep);
}

.hero p {
  margin: 0 0 16px;
  font-size: 19px;
}

.hero-icon {
  flex: 0 1 220px;
  margin: 0 auto;
}

.hero-icon img {
  display: block;
  width: 100%;
  max-width: 220px;
  height: auto;
  border-radius: 44px;
  box-shadow: var(--shadow);
}

.availability {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 15px;
  font-weight: 600;
}

/* Content */

main {
  padding: 32px 0 48px;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin: 8px 0 32px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px 20px;
  box-shadow: var(--shadow);
}

.card h3 {
  margin: 0 0 6px;
  font-size: 18px;
  color: var(--brand-deep);
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}

.prose {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 8px 28px 24px;
  box-shadow: var(--shadow);
  overflow-wrap: break-word;
}

.prose h1 {
  font-size: 30px;
  line-height: 1.2;
  margin: 20px 0 4px;
  color: var(--brand-deep);
}

.prose h2 {
  font-size: 21px;
  margin: 28px 0 8px;
  color: var(--brand-deep);
}

.prose h3 {
  font-size: 18px;
  margin: 20px 0 6px;
}

.prose .updated {
  color: var(--muted);
  margin-top: 0;
}

.prose ul {
  padding-left: 22px;
}

.prose li {
  margin: 4px 0;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  margin: 12px 0;
  display: block;
  overflow-x: auto;
}

.prose th,
.prose td {
  text-align: left;
  vertical-align: top;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
}

.prose th {
  color: var(--muted);
  font-weight: 600;
}

.callout {
  border-left: 4px solid var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, var(--surface));
  padding: 10px 16px;
  border-radius: 0 10px 10px 0;
  margin: 16px 0;
}

.section-title {
  font-size: 24px;
  margin: 8px 0 12px;
  color: var(--brand-deep);
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 20px 0 32px;
  color: var(--muted);
  font-size: 14px;
}

.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
}

.site-footer a {
  color: var(--muted);
}

@media (max-width: 520px) {
  body {
    font-size: 16px;
  }

  .prose {
    padding: 4px 16px 16px;
  }

  .hero {
    padding-top: 24px;
  }
}