/* =========================================================
   Omobuilds — stylesheet
   Identity: a small workshop that builds free tools.
   Blueprint grid paper, drafting corner-marks, amber ink.
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;700&display=swap');

:root {
  color-scheme: light;

  --bg: #eef2f6;
  --bg-raised: #ffffff;
  --ink: #16202a;
  --ink-soft: #51606e;
  --rule: #c7d2db;
  --grid-line: rgba(22, 32, 42, 0.07);

  --panel: #ffffff;
  --panel-border: #c7d2db;

  --accent: #c8711f;
  --accent-ink: #9a5416;
  --accent-contrast: #fffaf1;

  --focus: #c8711f;
  --shadow: rgba(22, 32, 42, 0.12);

  --maxw: 1040px;
  --font-display: 'Space Grotesk', 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
}

:root:not([data-theme="light"]) {
  @media (prefers-color-scheme: dark) {
    color-scheme: dark;
    --bg: #0e2238;
    --bg-raised: #123049;
    --ink: #eaf1f8;
    --ink-soft: #a9bdd0;
    --rule: #2c5172;
    --grid-line: rgba(255, 255, 255, 0.07);

    --panel: #123049;
    --panel-border: #2c5172;

    --accent: #f0a04b;
    --accent-ink: #ffd39c;
    --accent-contrast: #0e2238;

    --focus: #f0a04b;
    --shadow: rgba(0, 0, 0, 0.45);
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0e2238;
  --bg-raised: #123049;
  --ink: #eaf1f8;
  --ink-soft: #a9bdd0;
  --rule: #2c5172;
  --grid-line: rgba(255, 255, 255, 0.07);

  --panel: #123049;
  --panel-border: #2c5172;

  --accent: #f0a04b;
  --accent-ink: #ffd39c;
  --accent-contrast: #0e2238;

  --focus: #f0a04b;
  --shadow: rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background-color: var(--bg);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 28px 28px;
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 1.05rem;
  line-height: 1.6;
  padding-left: max(16px, env(safe-area-inset-left));
  padding-right: max(16px, env(safe-area-inset-right));
}
img, svg { max-width: 100%; }
a { color: var(--accent-ink); }
h1, h2, h3 { line-height: 1.2; margin: 0 0 0.5em; font-weight: 600; }
p { margin: 0 0 1em; }
ul { padding-left: 1.2em; }
.mono { font-family: var(--font-mono); }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0; padding: 0; margin: -1px;
}
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }

.skip-link {
  position: absolute; left: 8px; top: -60px;
  background: var(--accent); color: var(--accent-contrast);
  padding: 0.6em 1em; font-family: var(--font-mono); font-size: 0.85rem;
  z-index: 100;
}
.skip-link:focus { top: 8px; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 4px; }

/* ---------- Header ---------- */
.site-header {
  border-bottom: 1.5px solid var(--rule);
  padding: 18px 0 16px;
  background: var(--bg);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; flex-wrap: wrap;
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  text-decoration: none; color: var(--ink);
}
.brand-mark {
  width: 34px; height: 34px;
  border: 2px solid var(--accent);
  border-radius: 6px;
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-weight: 700; font-size: 1rem;
  color: var(--accent-ink);
}
.brand-name {
  font-weight: 700; font-size: 1.25rem; letter-spacing: -0.01em;
}
.site-nav { display: flex; gap: 2px; flex-wrap: wrap; font-family: var(--font-mono); font-size: 0.82rem; }
.site-nav a {
  text-decoration: none; padding: 7px 10px; color: var(--ink-soft);
  border-bottom: 2px solid transparent;
}
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--accent); }

.theme-toggle {
  font-family: var(--font-mono); font-size: 0.78rem;
  background: var(--bg-raised); border: 1.5px solid var(--rule); color: var(--ink);
  padding: 7px 10px; border-radius: 4px; cursor: pointer;
  display: inline-flex; align-items: center; gap: 6px;
}
.theme-toggle:hover { border-color: var(--ink-soft); }
.theme-toggle svg { width: 14px; height: 14px; }

/* ---------- Hero ---------- */
.hero { padding: 56px 0 32px; }
.hero .wrap { max-width: 700px; }
.hero-kicker {
  font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.04em;
  color: var(--accent-ink); display: inline-block; margin-bottom: 14px;
}
.hero h1 { font-size: clamp(1.9rem, 6vw, 2.9rem); }
.hero p.lede { font-size: 1.15rem; color: var(--ink-soft); max-width: 56ch; }

/* ---------- Draft panel (app card) ---------- */
.app-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin: 24px 0 56px;
}
@media (min-width: 640px) {
  .app-grid { grid-template-columns: 1fr 1fr; }
}

.app-card {
  position: relative;
  background: var(--panel);
  border: 1.5px solid var(--panel-border);
  border-radius: 4px;
  padding: 22px 20px;
  box-shadow: 3px 3px 0 var(--shadow);
}
.app-card::before, .app-card::after {
  content: "";
  position: absolute;
  width: 14px; height: 14px;
  border-color: var(--accent);
  border-style: solid;
}
.app-card::before {
  top: -1.5px; left: -1.5px;
  border-width: 2px 0 0 2px;
}
.app-card::after {
  bottom: -1.5px; right: -1.5px;
  border-width: 0 2px 2px 0;
}
.app-card .label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  display: block;
  margin-bottom: 8px;
}
.app-card h2 { font-size: 1.25rem; margin-bottom: 6px; }
.app-card p { color: var(--ink-soft); font-size: 0.96rem; margin-bottom: 16px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 0.86rem; font-weight: 700;
  text-decoration: none; cursor: pointer; border-radius: 4px;
  padding: 11px 16px; border: 2px solid var(--ink); line-height: 1;
}
.btn-accent {
  background: var(--accent); border-color: var(--accent); color: var(--accent-contrast);
}
.btn-accent:hover { background: var(--accent-ink); border-color: var(--accent-ink); }
.btn-outline { background: transparent; color: var(--ink); }
.btn-outline:hover { background: var(--ink); color: var(--bg); }

/* ---------- Ad slots (collapse when empty) ---------- */
.ad-slot { margin: 28px auto; max-width: 728px; text-align: center; }
.ad-slot:empty { display: none; margin: 0; }
.ad-slot-label {
  font-family: var(--font-mono); font-size: 0.65rem; color: var(--ink-soft);
  letter-spacing: 0.08em; margin-bottom: 4px;
}

/* ---------- Simple pages ---------- */
.page { padding: 44px 0; }
.page .wrap { max-width: 700px; }
.page h1 { font-size: clamp(1.7rem, 5vw, 2.4rem); }
.page h2 { font-size: 1.25rem; margin-top: 1.5em; padding-top: 0.4em; border-top: 1.5px solid var(--rule); }

/* ---------- Guide articles ---------- */
.guide-kicker { font-family: var(--font-mono); font-size: 0.8rem; }
.guide-kicker a { color: var(--ink-soft); }
.guide-meta {
  font-family: var(--font-mono); font-size: 0.72rem; color: var(--ink-soft);
  letter-spacing: 0.04em; margin: 6px 0 0;
}
.callout {
  background: var(--panel); color: var(--ink);
  border: 1.5px solid var(--panel-border); border-radius: 4px;
  padding: 16px 18px; margin: 1.6em 0; font-size: 0.96rem;
}
.callout strong {
  display: block; margin-bottom: 4px; font-family: var(--font-mono);
  font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.04em;
}
.callout.warning { border-color: var(--accent); }
.callout.warning strong { color: var(--accent-ink); }
.guide-cta { margin: 2em 0; }

/* ---------- Footer ---------- */
.site-footer { margin-top: 40px; border-top: 1.5px solid var(--rule); padding: 24px 0; }
.footer-grid {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 18px;
  margin-bottom: 14px;
}
.footer-links { display: flex; flex-wrap: wrap; gap: 4px 14px; font-family: var(--font-mono); font-size: 0.8rem; }
.footer-links a { color: var(--ink-soft); }
.footer-links a:hover { color: var(--ink); }
.disclaimer {
  font-family: var(--font-mono); font-size: 0.76rem; color: var(--ink-soft);
  border-top: 1px dashed var(--rule); padding-top: 12px; margin: 0;
}

@media (prefers-reduced-motion: no-preference) {
  .app-card { transition: transform 0.15s ease, box-shadow 0.15s ease; }
  .app-card:hover { transform: translate(-2px, -2px); box-shadow: 5px 5px 0 var(--shadow); }
  .skip-link { transition: top 0.15s ease; }
}