@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Libre+Baskerville:ital,wght@0,400;0,700;1,400&display=swap');

:root {
  /* Rivid brand palette ("Graphite & Iron Red"); shared with the Rivid Log app (Resources/Styles/Colors.xaml) */
  --ink: #171a18;
  --muted: #626862;
  --paper: #f7f5ef;
  --surface: #ffffff;
  --line: #deded7;
  --soft: #ece9df;
  /* Iron Red: the red bar from the Rivid and Rivid Log marks */
  --accent: #b3241b;
  --accent-dark: #8a1b14;
  /* graphite (the app's dark theme) */
  --graphite: #141518;
  --graphite-surface: #1c1e21;
  --graphite-raised: #25282c;
  --graphite-line: #33373c;
  --graphite-text: #f2f3f4;
  --graphite-muted: #9da3a8;
  --accent-on-dark: #e8483d;
  --max: 1080px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "DM Sans", system-ui, sans-serif;
  line-height: 1.7;
}
a { color: inherit; }
.container { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; }

.site-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(247,245,239,.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}
.nav {
  min-height: 72px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.brand {
  font-family: "Libre Baskerville", Georgia, serif;
  font-weight: 700; text-decoration: none; font-size: 1.25rem;
  letter-spacing: -.02em;
  display: inline-flex; align-items: center; gap: 10px;
}
.brand img { width: 36px; height: 36px; }
.brand-text span { font-weight: 400; font-style: italic; }
nav { display: flex; gap: 24px; }
nav a { text-decoration: none; color: var(--muted); font-size: .9rem; }
nav a:hover, nav a.active { color: var(--ink); }

.hero {
  min-height: 620px;
  display: flex; align-items: center;
  background:
    radial-gradient(circle at 80% 20%, rgba(179,36,27,.08), transparent 32%),
    linear-gradient(135deg, var(--paper), #efede5);
  border-bottom: 1px solid var(--line);
}
.hero-inner { padding: 100px 0; }
.hero-split { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 48px; }
.hero-logo { width: clamp(160px, 22vw, 240px); height: auto; filter: drop-shadow(0 18px 30px rgba(0,0,0,.18)); }
.eyebrow {
  margin: 0 0 16px;
  font-size: .75rem; font-weight: 700; letter-spacing: .18em;
  color: var(--accent);
}
/* Brand signature: the short Iron Red bar from the Rivid and Rivid Log marks (also in the app) */
.eyebrow::before {
  content: ""; display: block;
  width: 32px; height: 3px; margin-bottom: 14px;
  border-radius: 2px; background: currentColor;
}
.centered .eyebrow::before { margin-left: auto; margin-right: auto; }
.card .eyebrow::before { display: none; }
h1, h2, h3 {
  font-family: "Libre Baskerville", Georgia, serif;
  line-height: 1.2;
}
h1 { font-size: clamp(2.7rem, 7vw, 5.4rem); letter-spacing: -.045em; margin: 0 0 28px; max-width: 850px; }
h1 em { font-weight: 400; }
h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); margin: 0 0 16px; letter-spacing: -.03em; }
h3 { font-size: 1.2rem; margin: 0 0 10px; }
p { margin: 0 0 18px; }
.lead { max-width: 700px; color: var(--muted); font-size: 1.15rem; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.button {
  display: inline-block; padding: 12px 18px; border-radius: 999px;
  text-decoration: none; font-weight: 600; border: 1px solid var(--ink);
}
.button.primary { background: var(--ink); color: white; }
.button.secondary { background: transparent; }
.button.is-pending { opacity: .55; cursor: default; }
.actions-secondary { margin-top: 12px; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.section { padding: 100px 0; }
.section.muted { background: var(--soft); }
.section-heading { max-width: 680px; margin-bottom: 42px; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card {
  background: var(--surface); border: 1px solid var(--line);
  padding: 28px; border-radius: 12px;
}
.card p { color: var(--muted); font-size: .95rem; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; }
.split > div:last-child { color: var(--muted); max-width: 600px; }
.centered { text-align: center; }
.narrow { max-width: 620px; margin: 0 auto 28px; color: var(--muted); }
.link-row { display: flex; justify-content: center; flex-wrap: wrap; gap: 26px; font-weight: 600; }
.link-row a { text-decoration: underline; text-underline-offset: 4px; }

.featured {
  display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 36px; align-items: center;
  margin-bottom: 56px;
}
.featured img { width: 120px; height: 120px; }
/* Rivid Log, Rivid Fuel and Rivid Dose preview their graphite product theme (rividlog/, rividfuel/, rividdose/styles.css) on the Rivid home page */
.featured.graphite {
  padding: 44px; border-radius: 16px;
  background:
    radial-gradient(circle at 85% 20%, rgba(232,72,61,.14), transparent 40%),
    linear-gradient(160deg, #1b1d20, var(--graphite) 65%);
  color: var(--graphite-text);
}
.featured.graphite .eyebrow { color: var(--accent-on-dark); }
.featured.graphite h2 { font-family: "DM Sans", system-ui, sans-serif; font-weight: 700; letter-spacing: -.035em; }
.featured.graphite .lead { color: var(--graphite-muted); }
.featured.graphite .button.primary { background: var(--graphite-text); border-color: var(--graphite-text); color: var(--graphite); }
.card .eyebrow { margin-bottom: 10px; color: var(--accent); font-size: .75rem; }
/* A lone card on the last row of three spans the full width. */
.grid .card:last-child:nth-child(3n + 1) { grid-column: 1 / -1; }
.split h3 { margin-top: 0; }
/* the next app's featured block follows the previous app's card grid */
.featured-next { margin-top: 80px; }

.legal { padding: 90px 0; }
.narrow-wide { max-width: 820px; }
.legal h1 { font-size: clamp(2.4rem, 6vw, 4.3rem); }
.legal h2 { font-size: 1.55rem; margin-top: 44px; }
.legal h3 { font-size: 1.05rem; margin-top: 30px; }
.updated, .small { color: var(--muted); font-size: .88rem; }
.notice, .support-box {
  margin: 34px 0; padding: 24px 26px;
  border: 1px solid var(--line); border-left: 4px solid var(--accent);
  background: var(--surface);
}
.support-email { font-weight: 700; font-size: 1.1rem; }
footer { border-top: 1px solid var(--line); padding: 28px 0; color: var(--muted); font-size: .85rem; }
.footer-inner { display: flex; justify-content: space-between; gap: 20px; }

@media (max-width: 800px) {
  .grid { grid-template-columns: 1fr 1fr; }
  .featured { grid-template-columns: 1fr; gap: 20px; }
  .grid .card:last-child:nth-child(3n + 1) { grid-column: auto; }
  .featured img { width: 96px; height: 96px; }
  .featured.graphite { padding: 28px; }
  .featured-next { margin-top: 56px; }
  .split { grid-template-columns: 1fr; gap: 25px; }
  .hero-split { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .hero-logo { order: -1; width: 120px; }
}
@media (max-width: 560px) {
  .container { width: min(calc(100% - 28px), var(--max)); }
  .nav { min-height: 64px; }
  .brand img { width: 30px; height: 30px; }
  nav { gap: 13px; }
  nav a { font-size: .82rem; }
  .hero { min-height: 540px; }
  .hero-inner { padding: 70px 0; }
  .section, .legal { padding: 70px 0; }
  .grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; }
}