/* Fossall — readable long-form, light theme */

:root {
  --bg: #f7f4ef;
  --fg: #1a1a1a;
  --muted: #5c5c5c;
  --accent: #0b5f4a;
  --accent-hover: #094d3c;
  --card: #fffdf9;
  --border: #ddd5c8;
  --widget: #eef6f3;
  --max: 42rem;
  --font: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

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

html {
  font-size: 18px;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--fg);
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 100% -20%, rgba(11, 95, 74, 0.08), transparent),
    radial-gradient(ellipse 60% 40% at 0% 100%, rgba(11, 95, 74, 0.05), transparent);
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}

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

.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: 52rem;
  margin: 0 auto;
  padding: 1.25rem 1.25rem 0.5rem;
  font-family: var(--sans);
}

.logo {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--fg);
  text-decoration: none;
}

.logo:hover {
  color: var(--accent);
}

nav {
  display: flex;
  gap: 1.25rem;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}

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

main {
  max-width: 52rem;
  margin: 0 auto;
  padding: 1rem 1.25rem 3rem;
}

.hero {
  max-width: var(--max);
  padding: 2rem 0 1rem;
}

.hero h1,
.essay h1 {
  font-size: clamp(1.75rem, 4vw, 2.35rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
}

.lede {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: var(--max);
}

.btn {
  display: inline-block;
  margin-top: 0.5rem;
  padding: 0.65rem 1.1rem;
  font-family: var(--sans);
  font-size: 0.95rem;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border-radius: 0.4rem;
  text-decoration: none;
}

.btn:hover {
  background: var(--accent-hover);
  color: #fff;
}

.btn.secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--border);
}

.btn.secondary:hover {
  border-color: var(--accent);
  color: var(--accent-hover);
}

.cards {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
}

.cards article {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 1.25rem;
}

.cards h2 {
  font-family: var(--sans);
  font-size: 1rem;
  margin: 0 0 0.5rem;
}

.cards p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--muted);
}

.essay {
  max-width: var(--max);
}

.essay-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.eyebrow {
  font-family: var(--sans);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin: 0 0 0.75rem;
}

.essay section {
  margin-bottom: 2.25rem;
}

.essay h2 {
  font-size: 1.35rem;
  margin: 0 0 0.75rem;
}

.essay p,
.essay li {
  color: #2a2a2a;
}

.essay ul,
.essay ol {
  padding-left: 1.25rem;
}

.essay li {
  margin-bottom: 0.4rem;
}

.widget {
  background: var(--widget);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 1.25rem;
  margin: 1.5rem 0;
  font-family: var(--sans);
}

.widget h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
}

.widget-note {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0 0 1rem;
}

.widget label {
  display: block;
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}

.widget input[type="range"] {
  width: 100%;
  max-width: 24rem;
  accent-color: var(--accent);
}

.widget-out {
  margin: 1rem 0 0;
  padding: 0.75rem 1rem;
  background: var(--card);
  border-radius: 0.35rem;
  border: 1px solid var(--border);
  font-variant-numeric: tabular-nums;
  font-size: 0.95rem;
}

.closing {
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
}

.site-footer {
  max-width: 52rem;
  margin: 0 auto;
  padding: 1rem 1.25rem 2.5rem;
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--muted);
}

.site-footer p {
  margin: 0;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121412;
    --fg: #eeeae3;
    --muted: #a39e94;
    --accent: #5dba9a;
    --accent-hover: #7dceb2;
    --card: #1a1d1a;
    --border: #2e332e;
    --widget: #1a2420;
  }

  .essay p,
  .essay li {
    color: #ddd8cf;
  }

  .btn {
    color: #0a1210;
  }

  .btn:hover {
    color: #0a1210;
  }
}