:root {
  color-scheme: light dark;
  --ink: #14201a;
  --mute: #4a5c52;
  --bg: #f4f7f2;
  --paper: #ffffff;
  --line: #d5e0d8;
  --accent: #0f7a66;
  --accent-soft: #d8f0e8;
  --warm: #c45c26;
  --radius: 1rem;
  --shadow: 0 12px 40px rgba(20, 32, 26, 0.08);
  --font: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: "Segoe UI", system-ui, -apple-system, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e8f0ea;
    --mute: #9db0a4;
    --bg: #0c1410;
    --paper: #15201a;
    --line: #2a3b32;
    --accent: #3dceb0;
    --accent-soft: #16352c;
    --warm: #e08955;
    --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  font: 1.05rem/1.65 var(--sans);
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, color-mix(in srgb, var(--accent) 18%, transparent), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, color-mix(in srgb, var(--warm) 12%, transparent), transparent 55%),
    var(--bg);
}
a { color: var(--accent); text-underline-offset: 0.15em; }
a:hover { color: var(--warm); }
.wrap { width: min(68rem, calc(100% - 2.5rem)); margin-inline: auto; }
.skip {
  position: absolute; left: -999px; top: 0;
  background: var(--paper); color: var(--ink); padding: 0.5rem 1rem; z-index: 100;
}
.skip:focus { left: 1rem; top: 1rem; }
.site-header {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
}
.site-header .bar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; padding: 0.85rem 0;
}
.brand {
  display: flex; align-items: baseline; gap: 0.55rem;
  text-decoration: none; color: var(--ink); font-family: var(--font);
}
.brand strong { font-size: 1.2rem; letter-spacing: -0.02em; }
.brand span { color: var(--mute); font-size: 0.85rem; font-family: var(--sans); }
.nav { display: flex; flex-wrap: wrap; gap: 0.85rem 1.1rem; }
.nav a { color: var(--mute); text-decoration: none; font-size: 0.95rem; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); }
.hero { padding: clamp(2.5rem, 6vw, 5rem) 0 2rem; display: grid; gap: 1.25rem; }
.kicker {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-size: 0.8rem; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--accent); font-weight: 600;
}
.hero h1 {
  margin: 0; font-family: var(--font);
  font-size: clamp(2.1rem, 5vw, 3.4rem); line-height: 1.12;
  letter-spacing: -0.03em; max-width: 16ch;
}
.lede { margin: 0; max-width: 42rem; color: var(--mute); font-size: 1.15rem; }
.voice {
  max-width: 42rem; padding: 1rem 1.15rem; border-radius: var(--radius);
  background: var(--accent-soft); border: 1px solid color-mix(in srgb, var(--accent) 28%, transparent);
  color: var(--ink); font-size: 0.98rem;
}
.voice strong { color: var(--accent); }
.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.7rem 1.1rem; border-radius: 999px; text-decoration: none;
  font-weight: 600; font-size: 0.95rem; border: 1px solid transparent;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { filter: brightness(1.05); color: #fff; }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
section { padding: 2.5rem 0; }
section h2 {
  margin: 0 0 0.4rem; font-family: var(--font);
  font-size: clamp(1.6rem, 3vw, 2.1rem); letter-spacing: -0.02em;
}
.section-lead { margin: 0 0 1.5rem; color: var(--mute); max-width: 40rem; }
.card-grid {
  display: grid; gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
}
.card {
  background: var(--paper); border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 0.15rem); padding: 1.2rem 1.25rem;
  box-shadow: var(--shadow); display: grid; gap: 0.55rem; align-content: start;
  text-decoration: none; color: inherit; transition: transform 0.15s ease, border-color 0.15s ease;
}
.card:hover { transform: translateY(-2px); border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); }
.card h3 { margin: 0; font-family: var(--font); font-size: 1.25rem; }
.card p { margin: 0; color: var(--mute); font-size: 0.98rem; }
.card .meta { font-size: 0.8rem; color: var(--accent); font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; }
.articles-list { display: grid; gap: 1rem; }
.article-card {
  background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 1.25rem 1.35rem;
  box-shadow: var(--shadow); display: grid; gap: 0.45rem;
}
.article-card h3 { margin: 0; font-family: var(--font); font-size: 1.35rem; }
.article-card h3 a { color: inherit; text-decoration: none; }
.article-card h3 a:hover { color: var(--accent); }
.article-card .byline { color: var(--mute); font-size: 0.9rem; }
.article-card .excerpt { margin: 0.2rem 0 0; color: var(--mute); }
.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.35rem; }
.tag {
  font-size: 0.75rem; padding: 0.2rem 0.55rem; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent); font-weight: 600;
}
.site-footer {
  margin-top: 2rem; padding: 2rem 0 2.5rem;
  border-top: 1px solid var(--line); color: var(--mute); font-size: 0.92rem;
}
.site-footer .wrap { display: grid; gap: 0.5rem; }
.article-page { padding: 2rem 0 3rem; }
.article-page header { margin-bottom: 1.75rem; max-width: 42rem; }
.article-page h1 {
  margin: 0.35rem 0 0.5rem; font-family: var(--font);
  font-size: clamp(1.9rem, 4vw, 2.7rem); line-height: 1.15; letter-spacing: -0.02em;
}
.prose {
  max-width: 42rem; background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--radius); padding: clamp(1.25rem, 3vw, 2rem);
  box-shadow: var(--shadow);
}
.prose h2, .prose h3 { font-family: var(--font); letter-spacing: -0.01em; }
.prose code {
  font-size: 0.9em; padding: 0.1em 0.35em; border-radius: 0.3em;
  background: var(--accent-soft);
}
.status { color: var(--mute); font-size: 0.95rem; }
@media (max-width: 640px) {
  .site-header .bar { flex-direction: column; align-items: flex-start; }
}

/* Soft-rise — davinci motion pass; honor reduced-motion */
@keyframes soft-rise {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}
.hero, .card, .article-card {
  animation: soft-rise 0.55s ease both;
}
.card-grid .card:nth-child(1), .articles-list .article-card:nth-child(1) { animation-delay: 0.05s; }
.card-grid .card:nth-child(2), .articles-list .article-card:nth-child(2) { animation-delay: 0.1s; }
.card-grid .card:nth-child(3), .articles-list .article-card:nth-child(3) { animation-delay: 0.15s; }
.card-grid .card:nth-child(4), .articles-list .article-card:nth-child(4) { animation-delay: 0.2s; }
.card-grid .card:nth-child(5), .articles-list .article-card:nth-child(5) { animation-delay: 0.25s; }
.card-grid .card:nth-child(n+6), .articles-list .article-card:nth-child(n+6) { animation-delay: 0.3s; }
@media (prefers-reduced-motion: reduce) {
  .hero, .card, .article-card { animation: none; }
  .card { transition: none; }
  .card:hover { transform: none; }
}

/* In-development notice — links to /in-development.html */
.dev-banner {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: center;
  gap: 0.45rem 0.85rem;
  padding: 0.55rem 1rem;
  text-decoration: none;
  background: color-mix(in srgb, var(--warm) 16%, var(--paper));
  border-bottom: 1px solid color-mix(in srgb, var(--warm) 35%, var(--line));
  color: var(--ink);
  font-size: 0.92rem;
  transition: background 0.15s ease;
}
.dev-banner:hover {
  background: color-mix(in srgb, var(--warm) 24%, var(--paper));
  color: var(--ink);
}
.dev-banner:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}
.dev-banner-label {
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.78rem;
  color: var(--warm);
}
.dev-banner-hint { color: var(--mute); }
.prose ul { padding-left: 1.25rem; }
.prose li { margin: 0.45rem 0; }
.article-page .byline { color: var(--mute); font-size: 0.95rem; margin: 0; }
@media (prefers-reduced-motion: reduce) {
  .dev-banner { transition: none; }
}

/* Known-problem flag page */
.problem-banner {
  margin: 0 0 1.25rem;
  padding: 0.9rem 1.1rem;
  border-radius: var(--radius);
  border: 1px solid color-mix(in srgb, var(--warm) 40%, var(--line));
  background: color-mix(in srgb, var(--warm) 14%, var(--paper));
  color: var(--ink);
  font-size: 0.98rem;
}
.problem-list { padding-left: 1.2rem; margin: 0.5rem 0 1.25rem; }
.problem-list li { margin: 0.75rem 0; }
.problem-list p { margin: 0.35rem 0 0; color: var(--mute); }
.problem-meta { color: var(--mute); font-size: 0.88rem; font-weight: 500; }
.block-code {
  display: inline-block; margin-top: 0.35rem; padding: 0.35rem 0.55rem;
  background: var(--accent-soft); border-radius: 0.35rem; font-size: 0.88rem;
  word-break: break-all;
}
.prose ol { padding-left: 1.25rem; }
.prose ol li { margin: 0.55rem 0; }