/* addit-tools-web — hub root (tools.addit.digital)
 * Minimal directory page + 404. Design tokens ported verbatim from
 * addit-harness's site.scss for brand consistency across the hub and its
 * tool subfolders (see addit-harness's docs/plans/2026-07-11-harness-website.md).
 * Deliberately small in scope — this page's only job is to not be a dead
 * link at the domain root; a richer hub design is out of scope until a
 * second tool exists (see that plan's "Out of scope" section).
 *
 * baseurl: this repo has none (it IS the domain root), so plain root-
 * relative paths are correct here — unlike a tool subfolder under it.
 */

@font-face {
  font-family: 'Big Shoulders Display';
  font-weight: 800;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/big-shoulders-display-800.woff2') format('woff2');
}
@font-face {
  font-family: 'IBM Plex Sans';
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/ibm-plex-sans-400.woff2') format('woff2');
}
@font-face {
  font-family: 'IBM Plex Sans';
  font-weight: 600;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/ibm-plex-sans-600.woff2') format('woff2');
}

:root {
  --ground: #14161a;
  --surface: #1b1e22;
  --ink: #ece7de;
  --ink-dim: #9a9e9e;
  --accent: #dd9548;
  --accent-ink: #1b1206;
  --accent-soft: rgba(221, 149, 72, 0.14);
  --line: rgba(236, 231, 222, 0.12);
  --line-strong: rgba(236, 231, 222, 0.22);
  --radius: 3px;
  --font-display: 'Big Shoulders Display', 'Arial Narrow', sans-serif;
  --font-body: 'IBM Plex Sans', -apple-system, sans-serif;
  --font-mono: ui-monospace, 'SF Mono', monospace;
}

@media (prefers-color-scheme: light) {
  :root {
    --ground: #eef0ee;
    --surface: #ffffff;
    --ink: #14161a;
    --ink-dim: #53585a;
    --accent: #b0651c;
    --accent-ink: #fff8ef;
    --accent-soft: rgba(176, 101, 28, 0.10);
    --line: rgba(20, 22, 26, 0.12);
    --line-strong: rgba(20, 22, 26, 0.24);
  }
}

* { box-sizing: border-box; }
html { color-scheme: light dark; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
::selection { background: var(--accent); color: var(--accent-ink); }
a { color: inherit; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: var(--accent-ink);
  padding: 10px 16px;
  z-index: 100;
  font-family: var(--font-mono);
  font-size: 13px;
}
.skip-link:focus { left: 12px; top: 12px; }

a:focus-visible,
.card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 28px;
  width: 100%;
}

header.nav {
  border-bottom: 1px solid var(--line);
}
.nav-row {
  display: flex;
  align-items: center;
  height: 64px;
}
.wordmark {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 15px;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--ink);
}
.wordmark .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

main { flex: 1; }

.hero {
  padding: 72px 0 48px;
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 16px;
}
h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 5vw, 44px);
  line-height: 1.05;
  text-transform: uppercase;
  margin: 0 0 16px;
  text-wrap: balance;
}
.lede {
  font-size: 17px;
  color: var(--ink-dim);
  max-width: 52ch;
  margin: 0;
}

.tools {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 72px;
}
.card {
  display: block;
  background: var(--surface);
  padding: 24px 26px;
  text-decoration: none;
  color: inherit;
  transition: background-color .15s ease;
}
.card:hover { background: var(--accent-soft); }
.card-name {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 15px;
  color: var(--accent);
  margin-bottom: 8px;
}
.card-name::after { content: " →"; }
.card-desc {
  font-size: 14.5px;
  color: var(--ink-dim);
  margin: 0;
  max-width: 58ch;
}

footer {
  border-top: 1px solid var(--line);
  padding: 28px 0;
}
.footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
}
.footer-links { display: flex; gap: 20px; }
.footer-links a { text-decoration: none; color: var(--ink-dim); }
.footer-links a:hover { color: var(--accent); }
.footer-meta { font-family: var(--font-mono); color: var(--ink-dim); }

/* 404 page */
.not-found {
  padding: 96px 0;
  text-align: center;
}
.not-found .eyebrow { justify-content: center; }
.not-found h1 { font-size: clamp(40px, 8vw, 64px); }
.not-found .lede { margin: 0 auto 32px; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  padding: 12px 20px;
  border-radius: var(--radius);
  background: var(--accent);
  color: var(--accent-ink);
  text-decoration: none;
}
.btn:hover { filter: brightness(1.08); }