/* ScreenRuler site — single stylesheet, no external dependencies.
   Light and dark are both handled via prefers-color-scheme. */

:root {
  --bg: #ffffff;
  --bg-soft: #f6f7f9;
  --text: #1d1d1f;
  --text-soft: #5b5f66;
  --line: #e3e5e9;
  --accent: #2f6df6;
  --accent-soft: rgba(47, 109, 246, 0.1);
  --radius: 12px;
  --maxw: 760px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --bg-soft: #171a20;
    --text: #f2f3f5;
    --text-soft: #a2a8b3;
    --line: #262a32;
    --accent: #6f9bff;
    --accent-soft: rgba(111, 155, 255, 0.14);
  }
}

* { box-sizing: border-box; }

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

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

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header ------------------------------------------------------------ */

header {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
}

header .wrap {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 64px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 17px;
  color: var(--text);
  text-decoration: none;
  margin-right: auto;
}

.brand .mark {
  width: 26px;
  height: 26px;
  border-radius: 7px;
  background: var(--accent);
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 14px;
}

nav a {
  color: var(--text-soft);
  text-decoration: none;
  font-size: 14px;
  padding: 6px 10px;
  border-radius: 8px;
}

nav a:hover { color: var(--text); background: var(--bg-soft); }
nav a[aria-current="page"] { color: var(--accent); background: var(--accent-soft); }

/* Content ----------------------------------------------------------- */

main { padding: 40px 0 72px; }

h1 {
  font-size: 32px;
  line-height: 1.2;
  margin: 0 0 6px;
  letter-spacing: -0.02em;
}

.updated {
  color: var(--text-soft);
  font-size: 14px;
  margin: 0 0 32px;
}

h2 {
  font-size: 20px;
  margin: 36px 0 10px;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 16px;
  margin: 24px 0 6px;
}

p, li { color: var(--text); }
p { margin: 0 0 14px; }

ul { margin: 0 0 16px; padding-left: 22px; }
li { margin-bottom: 7px; }

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

strong { font-weight: 600; }

.lead {
  font-size: 17px;
  color: var(--text-soft);
  margin-bottom: 28px;
}

/* A callout for things the reader should actually notice. */
.note {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin: 20px 0;
}

.note p:last-child { margin-bottom: 0; }

/* Fill-these-in markers, so nothing ships with placeholder text unnoticed. */
.todo {
  background: #fff4d6;
  color: #6b4a00;
  border-radius: 5px;
  padding: 1px 6px;
  font-size: 0.92em;
  font-weight: 600;
}

@media (prefers-color-scheme: dark) {
  .todo { background: #4a3a12; color: #ffd873; }
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 22px;
  font-size: 15px;
}

th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

th {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-soft);
  font-weight: 600;
}

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

.hero { padding: 56px 0 8px; }
.hero h1 { font-size: 40px; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.card {
  display: block;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text);
  background: var(--bg-soft);
}

.card:hover { border-color: var(--accent); }
.card h3 { margin: 0 0 4px; }
.card p { margin: 0; color: var(--text-soft); font-size: 14px; }

/* Footer ------------------------------------------------------------ */

footer {
  border-top: 1px solid var(--line);
  padding: 26px 0 44px;
  color: var(--text-soft);
  font-size: 14px;
}

footer .wrap {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
}

footer nav { margin-left: auto; }

@media (max-width: 560px) {
  h1 { font-size: 26px; }
  .hero h1 { font-size: 32px; }
  main { padding: 28px 0 56px; }
}