/* prev's website, in the app's own Material 3 colors, from its blue seed. */

@font-face {
  font-family: "Roboto Flex";
  src: url("RobotoFlex.ttf") format("truetype");
  font-weight: 100 1000;
  font-display: swap;
}

:root {
  --primary: #2f5fb8;
  --on-primary: #ffffff;
  --primary-container: #d9e2ff;
  --on-primary-container: #001945;
  --surface: #faf8ff;
  --surface-container: #eef0f9;
  --surface-container-high: #e7e8f2;
  --on-surface: #1a1b21;
  --on-surface-variant: #44464f;
  --outline-variant: #c5c6d0;
  --shadow: 0 1px 3px rgb(0 0 0 / 0.12), 0 8px 24px rgb(0 0 0 / 0.10);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --primary: #b0c6ff;
    --on-primary: #002d6f;
    --primary-container: #1b4596;
    --on-primary-container: #d9e2ff;
    --surface: #121318;
    --surface-container: #1e1f25;
    --surface-container-high: #282a2f;
    --on-surface: #e3e2e9;
    --on-surface-variant: #c5c6d0;
    --outline-variant: #44464f;
    --shadow: 0 1px 3px rgb(0 0 0 / 0.4), 0 8px 24px rgb(0 0 0 / 0.35);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--surface);
  color: var(--on-surface);
  font-family: "Roboto Flex", system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.55;
}

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

code {
  font-family: ui-monospace, "DejaVu Sans Mono", monospace;
  font-size: 0.88em;
  background: var(--surface-container-high);
  padding: 0.1em 0.4em;
  border-radius: 6px;
  overflow-wrap: anywhere;
}

.top {
  position: sticky;
  top: 0;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 12px max(16px, calc((100% - 1080px) / 2));
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--outline-variant);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--on-surface);
  font-weight: 650;
  font-size: 20px;
  text-decoration: none;
}

nav { display: flex; gap: 20px; flex-wrap: wrap; }
nav a { color: var(--on-surface-variant); text-decoration: none; font-weight: 500; }
nav a:hover { color: var(--primary); }
nav .repo { color: var(--primary); }

main, footer { max-width: 1080px; margin: 0 auto; padding: 0 16px; }

section { padding: 56px 0; }
h1 { font-size: clamp(48px, 9vw, 72px); line-height: 1; margin: 16px 0 12px; font-weight: 700; letter-spacing: -0.02em; }
h2 { font-size: 32px; line-height: 1.2; margin: 0 0 20px; font-weight: 650; }
h3 { font-size: 20px; margin: 0 0 6px; font-weight: 650; }

.hero { text-align: center; padding-top: 48px; }
.hero-icon { display: block; margin: 0 auto; }
.lede { font-size: 20px; max-width: 680px; margin: 0 auto 24px; color: var(--on-surface-variant); }
.small { font-size: 15px; color: var(--on-surface-variant); }

.actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin: 0 0 12px; }
.button {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
}
.button.filled { background: var(--primary); color: var(--on-primary); }
.button.tonal { background: var(--primary-container); color: var(--on-primary-container); }
.button:hover { filter: brightness(1.08); }

.shot { display: block; width: 100%; height: auto; border-radius: 16px; box-shadow: var(--shadow); }
.hero-shot { margin-top: 40px; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.grid article { background: var(--surface-container); border-radius: 20px; padding: 22px 24px; }
.grid p { margin: 0; color: var(--on-surface-variant); }

.gallery { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 40px; }
figure { margin: 0; }
figure.wide { margin-top: 40px; }
figcaption { margin-top: 10px; text-align: center; color: var(--on-surface-variant); font-size: 15px; }

.table { overflow-x: auto; border-radius: 16px; border: 1px solid var(--outline-variant); }
table { width: 100%; border-collapse: collapse; font-size: 16px; }
th, td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--outline-variant); vertical-align: top; }
tr:last-child td { border-bottom: none; }
th { background: var(--surface-container); font-weight: 600; }

.policy { border-top: 1px solid var(--outline-variant); }
.policy ul { padding-left: 20px; }
.policy li { margin-bottom: 8px; }
.policy h3 { margin-top: 28px; }

footer { padding: 32px 16px 48px; border-top: 1px solid var(--outline-variant); color: var(--on-surface-variant); font-size: 15px; }

@media (max-width: 640px) {
  section { padding: 40px 0; }
  .gallery { grid-template-columns: 1fr; }
  /* Each download as a small card: the system, the file, then how. */
  thead { display: none; }
  table, tbody, tr, td { display: block; }
  tr { padding: 12px 16px; border-bottom: 1px solid var(--outline-variant); }
  tr:last-child { border-bottom: none; }
  td { padding: 2px 0; border: none; }
  td:first-child { font-weight: 600; }
  td:empty { display: none; }
  td code { white-space: normal; word-break: break-all; }
  .lede { font-size: 18px; }
  nav { gap: 14px; font-size: 15px; }
}