/* forknative.com — category manifesto site
   No frameworks, no external fonts, no JS required. */

:root {
  --bg: #faf8f5;
  --bg-raised: #ffffff;
  --ink: #21201c;
  --ink-soft: #55524a;
  --ink-faint: #8a8578;
  --accent: #0d7a5f;
  --accent-soft: #e3f1ec;
  --rule: #e4e0d7;
  --level-1: #8a7a3d;
  --level-2: #3d6d8a;
  --level-3: #0d7a5f;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #191815;
    --bg-raised: #211f1b;
    --ink: #eae7de;
    --ink-soft: #b3aea0;
    --ink-faint: #7d7869;
    --accent: #4dbd9a;
    --accent-soft: #1e2f29;
    --rule: #35322b;
    --level-1: #c2af62;
    --level-2: #6ea5c4;
    --level-3: #4dbd9a;
  }
}

* { box-sizing: border-box; }

html {
  font-size: 17px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia,
    "Times New Roman", serif;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

.wrap {
  max-width: 42rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ---------- header / hero ---------- */

header.hero {
  padding: 5rem 0 3.5rem;
  border-bottom: 1px solid var(--rule);
}

.hero .kicker {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1rem;
}

.hero h1 {
  font-size: clamp(2.4rem, 7vw, 3.6rem);
  line-height: 1.08;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin: 0 0 1.25rem;
}

.hero .lede {
  font-size: 1.25rem;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 0;
  max-width: 36rem;
}

.hero nav {
  margin-top: 2.25rem;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 0.88rem;
}

.hero nav a {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 1px;
  margin-right: 1.4rem;
}

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

/* ---------- prose ---------- */

main { padding-bottom: 2rem; }

section { padding: 2.75rem 0 0.5rem; }

h2 {
  font-size: 1.7rem;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 1.2rem 0 1rem;
}

h3 {
  font-size: 1.18rem;
  margin: 2rem 0 0.6rem;
}

p { margin: 0 0 1.1rem; }

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }

strong { font-weight: 700; }

em { font-style: italic; }

blockquote.thesis {
  margin: 2rem 0;
  padding: 1.4rem 1.6rem;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 8px 8px 0;
  font-size: 1.2rem;
  line-height: 1.5;
}

blockquote.thesis p { margin: 0; }

.section-rule {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 3rem 0 0;
}

/* ---------- requirement cards ---------- */

.requirements {
  display: grid;
  gap: 1.1rem;
  margin: 1.6rem 0;
}

.req {
  background: var(--bg-raised);
  border: 1px solid var(--rule);
  border-radius: 10px;
  padding: 1.2rem 1.4rem;
}

.req .req-num {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.35rem;
}

.req h3 { margin: 0 0 0.5rem; }

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

/* ---------- the ladder ---------- */

.ladder { margin: 2rem 0; display: grid; gap: 1.4rem; }

.level {
  background: var(--bg-raised);
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 1.5rem 1.6rem 1.3rem;
  position: relative;
  border-top: 4px solid var(--rule);
}

.level.l1 { border-top-color: var(--level-1); }
.level.l2 { border-top-color: var(--level-2); }
.level.l3 { border-top-color: var(--level-3); }

.level .level-tag {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin: 0 0 0.3rem;
}

.level.l1 .level-tag { color: var(--level-1); }
.level.l2 .level-tag { color: var(--level-2); }
.level.l3 .level-tag { color: var(--level-3); }

.level h3 { margin: 0 0 0.7rem; font-size: 1.35rem; }

.level ul.criteria {
  list-style: none;
  margin: 1rem 0 0.4rem;
  padding: 0;
  font-size: 0.95rem;
}

.level ul.criteria li {
  position: relative;
  padding-left: 1.7rem;
  margin-bottom: 0.55rem;
  color: var(--ink-soft);
}

.level ul.criteria li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.28em;
  width: 0.85em;
  height: 0.85em;
  border: 1.5px solid var(--ink-faint);
  border-radius: 3px;
}

.level ul.criteria li strong { color: var(--ink); font-weight: 600; }

.level .honesty {
  margin-top: 1rem;
  font-size: 0.92rem;
  color: var(--ink-soft);
  border-top: 1px dashed var(--rule);
  padding-top: 0.9rem;
}

.level .honesty p { margin-bottom: 0.6rem; }
.level .honesty p:last-child { margin-bottom: 0; }

.checkable-note {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 0.85rem;
  color: var(--ink-faint);
  margin-top: 0.4rem;
}

/* ---------- "not" list / prior art ---------- */

.not-list { margin: 1.4rem 0; }

.not-list h3 {
  margin: 1.8rem 0 0.4rem;
  font-size: 1.08rem;
}

/* ---------- reference implementation ---------- */

.reference {
  background: var(--bg-raised);
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 1.6rem 1.7rem;
  margin: 1.8rem 0;
}

.reference .badge {
  display: inline-block;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 0.25rem 0.75rem;
  margin-bottom: 0.8rem;
}

.reference h3 { margin: 0 0 0.6rem; font-size: 1.3rem; }
.reference p:last-child { margin-bottom: 0; }

/* ---------- footer ---------- */

footer {
  border-top: 1px solid var(--rule);
  margin-top: 3.5rem;
  padding: 2.2rem 0 3.5rem;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 0.88rem;
  color: var(--ink-soft);
}

footer p { margin: 0 0 0.5rem; }

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

/* ---------- small screens ---------- */

@media (max-width: 560px) {
  html { font-size: 16px; }
  header.hero { padding: 3.2rem 0 2.4rem; }
  .hero nav a { display: inline-block; margin-bottom: 0.5rem; }
  .level, .reference, .req { padding: 1.1rem 1.1rem 1rem; }
}