/* mileset — site styles. No web fonts, no third-party anything. */

:root {
  color-scheme: light dark;
  --bg: #F3F4F4;
  --surface: #FFFFFF;
  --ink: #15191B;
  --soft: #3E474B;
  --muted: #5B6569;
  --border: #D9DDDE;
  --accent: #0E6B5C;          /* deep teal: about 5.8:1 on --bg, 6.4:1 under white text */
  --accent-strong: #0A5246;
  --on-accent: #FFFFFF;
  --banner-bg: #FFF3CD;
  --banner-ink: #4A3800;
  --banner-border: #E6C65C;
  --mark-bg: #FFE9A8;
  --mark-ink: #3D2F00;
  --focus: #0E6B5C;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0F1214;
    --surface: #171C1F;
    --ink: #E8ECEC;
    --soft: #C3CACC;
    --muted: #9AA4A7;
    --border: #2A3236;
    --accent: #5CC7AE;        /* lighter teal for contrast on dark */
    --accent-strong: #84D9C4;
    --on-accent: #062A23;
    --banner-bg: #3A2E05;
    --banner-ink: #FBE7A6;
    --banner-border: #7A6219;
    --mark-bg: #4A3B07;
    --mark-ink: #FFEFB8;
    --focus: #84D9C4;
  }
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.6;
}

a { color: var(--accent-strong); text-underline-offset: 0.15em; }
@media (prefers-color-scheme: light) { a { color: var(--accent); } }
a:hover { text-decoration-thickness: 2px; }

:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 3px; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: var(--on-accent);
  border-radius: 0 0 8px 8px;
  font-weight: 600;
  z-index: 10;
}
.skip-link:focus { top: 0; }

.wrap { max-width: 44rem; margin: 0 auto; padding: 0 1.25rem; }

.site-header { padding: 1.5rem 0 0.5rem; }
.site-header .wrap { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }

.wordmark {
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
}
.wordmark:hover { color: var(--accent); }

.site-nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 1.25rem; }
.site-nav a { color: var(--soft); text-decoration: none; font-weight: 600; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--accent); text-decoration: underline; }

main { padding: 1rem 0 3rem; }

h1, h2, h3 { line-height: 1.25; letter-spacing: -0.01em; }
h1 { font-size: 2rem; margin: 1.25rem 0 0.25rem; }
h2 { font-size: 1.35rem; margin: 2.5rem 0 0.5rem; padding-top: 1rem; border-top: 1px solid var(--border); }
h3 { font-size: 1.1rem; margin: 1.5rem 0 0.25rem; }

.meta { color: var(--muted); margin: 0 0 1.5rem; }

.summary {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1rem 1.25rem;
}
.summary h2 { border-top: 0; margin-top: 0; padding-top: 0; font-size: 1.1rem; }
.summary ul { margin: 0; padding-left: 1.25rem; }

.toc ol { padding-left: 1.5rem; columns: 2 16rem; column-gap: 2rem; }
.toc li { break-inside: avoid; }

table { width: 100%; border-collapse: collapse; margin: 1rem 0; font-size: 0.95rem; }
th, td { text-align: left; vertical-align: top; padding: 0.5rem 0.6rem; border-bottom: 1px solid var(--border); }
th { color: var(--soft); font-weight: 700; }
.table-scroll { overflow-x: auto; }

/* Draft banner: remove the whole <div class="draft-banner"> block (between the DRAFT-BANNER comments) when reviewed. */
.draft-banner {
  background: var(--banner-bg);
  color: var(--banner-ink);
  border-bottom: 2px solid var(--banner-border);
  padding: 0.75rem 0;
  font-weight: 600;
}
.draft-banner p { margin: 0; }

/* Placeholder: text the owner must fill in before publishing. Search the source for class="placeholder". */
.placeholder {
  background: var(--mark-bg);
  color: var(--mark-ink);
  padding: 0 0.25em;
  border-radius: 3px;
  font-weight: 600;
}

/* Landing page */
.hero { padding: 3rem 0 1rem; }
.hero h1 { font-size: 3rem; margin: 0; letter-spacing: -0.03em; }
.hero .lede { font-size: 1.3rem; color: var(--soft); margin: 0.5rem 0 0; }

.rail { display: flex; flex-direction: column; align-items: flex-start; gap: 0; margin: 0 0 1.5rem 0.4rem; }
.rail span { display: block; }
.rail .stop { width: 14px; height: 14px; border: 3px solid var(--ink); border-radius: 50%; }
.rail .stop.first { border-color: var(--accent); background: var(--accent); }
.rail .line { width: 4px; margin-left: 5px; background: var(--ink); opacity: 0.85; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.25rem;
  margin: 1.5rem 0;
}
.card h2 { border-top: 0; margin-top: 0; padding-top: 0; }

.waitlist label { display: block; font-weight: 600; margin-bottom: 0.35rem; }
.waitlist .row { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.waitlist input[type="email"] {
  flex: 1 1 14rem;
  font: inherit;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  color: var(--ink);
}
.button {
  font: inherit;
  font-weight: 700;
  padding: 0.6rem 1.2rem;
  border: 0;
  border-radius: 999px;
  background: var(--accent);
  color: var(--on-accent);
  cursor: pointer;
}
.button:disabled, .waitlist input:disabled { opacity: 0.6; cursor: not-allowed; }
.hint { color: var(--muted); font-size: 0.95rem; margin: 0.5rem 0 0; }

.site-footer { border-top: 1px solid var(--border); padding: 1.5rem 0 2.5rem; color: var(--muted); font-size: 0.95rem; }
.site-footer ul { list-style: none; padding: 0; margin: 0 0 0.5rem; display: flex; gap: 1.25rem; flex-wrap: wrap; }

@media print {
  .skip-link, .site-nav, .waitlist { display: none; }
  body { background: #fff; color: #000; }
}