/* ===== Design tokens ===== */
:root {
  --bg: #FAFAF7;
  --bg-raised: #FFFFFF;
  --ink: #1B1D1E;
  --ink-soft: #565B5E;
  --line: #E4E2DC;
  --accent: #0F6B5C;
  --accent-ink: #FFFFFF;
  --accent-soft: #E6F0EC;
  --warn: #C1471D;
  --radius: 4px;
  --font-display: "Space Grotesk", "Segoe UI", sans-serif;
  --font-body: "Inter", "Segoe UI", sans-serif;
  --max-w: 1080px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { font-family: var(--font-display); line-height: 1.15; margin: 0 0 .5em; letter-spacing: -0.01em; }
h1 { font-size: clamp(1.9rem, 4vw, 2.7rem); }
h2 { font-size: clamp(1.3rem, 2.4vw, 1.7rem); }
p { margin: 0 0 1em; color: var(--ink-soft); max-width: 68ch; }
a { color: var(--accent); }
a.plain { color: inherit; text-decoration: none; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.wrap { max-width: var(--max-w); margin: 0 auto; padding: 0 20px; }

/* ===== Header ===== */
header.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--bg-raised);
  position: sticky; top: 0; z-index: 20;
}
.site-header .bar { display: flex; align-items: center; gap: 24px; padding: 14px 20px; max-width: var(--max-w); margin: 0 auto; }
.logo { font-family: var(--font-display); font-weight: 700; font-size: 1.25rem; text-decoration: none; color: var(--ink); white-space: nowrap; }
.logo span { color: var(--accent); }
.site-nav { display: flex; gap: 18px; margin-left: auto; }
.site-nav a { color: var(--ink-soft); text-decoration: none; font-size: 0.95rem; }
.site-nav a:hover { color: var(--ink); }

/* ===== Search ===== */
.search-box { position: relative; flex: 1; max-width: 360px; }
.search-box input {
  width: 100%; padding: 9px 14px; border: 1px solid var(--line); border-radius: var(--radius);
  font-family: var(--font-body); font-size: 0.95rem; background: var(--bg);
}
.search-box input:focus { border-color: var(--accent); }
.search-results {
  position: absolute; top: calc(100% + 6px); left: 0; right: 0; background: var(--bg-raised);
  border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 8px 24px rgba(0,0,0,.08);
  max-height: 340px; overflow-y: auto; display: none; z-index: 30;
}
.search-results.open { display: block; }
.search-results a { display: block; padding: 10px 14px; text-decoration: none; color: var(--ink); border-bottom: 1px solid var(--line); font-size: .92rem; }
.search-results a:last-child { border-bottom: none; }
.search-results a:hover, .search-results a.active { background: var(--accent-soft); }
.search-results .cat { color: var(--ink-soft); font-size: .78rem; }
.search-empty { padding: 14px; color: var(--ink-soft); font-size: .9rem; }

/* ===== Hero ===== */
.hero { padding: 56px 0 40px; border-bottom: 1px solid var(--line); }
.hero p.lead { font-size: 1.08rem; max-width: 56ch; }
.hero .stat-line { display: flex; gap: 28px; margin-top: 22px; flex-wrap: wrap; }
.hero .stat-line div { font-family: var(--font-display); font-size: 1.5rem; }
.hero .stat-line span { display: block; font-family: var(--font-body); font-size: .82rem; color: var(--ink-soft); }

/* ===== Ad slots ===== */
.ad-slot {
  border: 1px dashed var(--line); border-radius: var(--radius); background: var(--bg-raised);
  display: flex; align-items: center; justify-content: center; color: var(--ink-soft);
  font-size: .8rem; min-height: 90px; margin: 28px 0;
}
.ad-slot.ad-sidebar { min-height: 250px; }
.ad-slot.ad-leaderboard { min-height: 90px; }

/* ===== Category / tool grid ===== */
.category-block { padding: 36px 0; border-bottom: 1px solid var(--line); }
.category-block h2 { display: flex; align-items: baseline; gap: 10px; }
.category-block h2 small { font-family: var(--font-body); color: var(--ink-soft); font-weight: 400; font-size: 0.9rem; }
.tool-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 14px; margin-top: 18px; }
.tool-card {
  border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-raised);
  padding: 16px; text-decoration: none; color: var(--ink); display: block; transition: border-color .15s ease;
}
.tool-card:hover { border-color: var(--accent); }
.tool-card .icon {
  width: 34px; height: 34px; border-radius: var(--radius); background: var(--accent-soft); color: var(--accent);
  display: flex; align-items: center; justify-content: center; font-family: var(--font-display); font-weight: 700; margin-bottom: 12px;
}
.tool-card h3 { font-size: 1.02rem; margin-bottom: 4px; }
.tool-card p { font-size: .88rem; margin: 0; }

/* ===== Tool page ===== */
.tool-page-header { padding: 40px 0 24px; border-bottom: 1px solid var(--line); }
.breadcrumb { font-size: .85rem; color: var(--ink-soft); margin-bottom: 14px; }
.breadcrumb a { color: var(--ink-soft); }
.tool-layout { display: grid; grid-template-columns: minmax(0,1fr) 300px; gap: 32px; padding: 32px 0; align-items: start; }
.tool-app {
  border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-raised); padding: 24px;
}
.tool-content { padding: 8px 0 48px; }
.tool-content h2 { margin-top: 36px; }
.howto-list { padding-left: 1.2em; color: var(--ink-soft); }
.howto-list li { margin-bottom: 8px; }
.faq-item { border-bottom: 1px solid var(--line); padding: 16px 0; }
.faq-item h3 { font-size: 1rem; margin-bottom: 6px; }
.faq-item p { margin: 0; font-size: .95rem; }

/* ===== Form controls (shared across tools) ===== */
label { display: block; font-size: .85rem; font-weight: 600; margin-bottom: 6px; color: var(--ink); }
input[type=text], input[type=number], input[type=date], select, textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: var(--radius);
  font-family: var(--font-body); font-size: .95rem; background: var(--bg); color: var(--ink); margin-bottom: 16px;
}
textarea { resize: vertical; min-height: 140px; }
input:focus, select:focus, textarea:focus { border-color: var(--accent); }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; background: var(--accent); color: var(--accent-ink);
  border: none; border-radius: var(--radius); padding: 10px 18px; font-size: .92rem; font-weight: 600;
  cursor: pointer; font-family: var(--font-body);
}
.btn:hover { opacity: .92; }
.btn.secondary { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
.result-box {
  background: var(--accent-soft); border-radius: var(--radius); padding: 16px 18px; margin-top: 4px;
}
.result-box .big { font-family: var(--font-display); font-size: 1.7rem; }
.result-box .label { font-size: .82rem; color: var(--ink-soft); }
.tabs { display: flex; gap: 4px; margin-bottom: 18px; border-bottom: 1px solid var(--line); }
.tab-btn { background: none; border: none; padding: 8px 14px; cursor: pointer; font-family: var(--font-body); font-size: .9rem; color: var(--ink-soft); border-bottom: 2px solid transparent; }
.tab-btn.active { color: var(--ink); border-bottom-color: var(--accent); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(110px,1fr)); gap: 12px; margin: 4px 0 18px; }
.stat-grid .stat { background: var(--accent-soft); border-radius: var(--radius); padding: 12px; }
.stat-grid .stat b { display: block; font-family: var(--font-display); font-size: 1.3rem; }
.stat-grid .stat span { font-size: .78rem; color: var(--ink-soft); }
.color-swatch { width: 100%; height: 70px; border-radius: var(--radius); border: 1px solid var(--line); margin-bottom: 14px; }
.palette-row { display: grid; grid-template-columns: repeat(5,1fr); gap: 8px; }
.palette-cell { border-radius: var(--radius); height: 110px; display: flex; align-items: flex-end; justify-content: center; padding-bottom: 8px; cursor: pointer; border: 1px solid var(--line); }
.palette-cell code { background: rgba(255,255,255,.8); padding: 2px 6px; border-radius: 3px; font-size: .74rem; }
.copy-note { font-size: .8rem; color: var(--accent); height: 1em; margin-top: -8px; margin-bottom: 12px; }
.drop-zone { border: 1px dashed var(--line); border-radius: var(--radius); padding: 28px; text-align: center; color: var(--ink-soft); margin-bottom: 16px; cursor: pointer; }
.drop-zone.drag { border-color: var(--accent); background: var(--accent-soft); }
.preview-img { max-width: 100%; border-radius: var(--radius); border: 1px solid var(--line); margin-bottom: 14px; }

/* ===== Footer ===== */
footer.site-footer { border-top: 1px solid var(--line); padding: 40px 0; margin-top: 40px; color: var(--ink-soft); font-size: .85rem; }
footer.site-footer .cols { display: flex; gap: 60px; flex-wrap: wrap; margin-bottom: 24px; }
footer.site-footer h4 { font-family: var(--font-body); font-size: .82rem; color: var(--ink); margin-bottom: 10px; }
footer.site-footer a { color: var(--ink-soft); text-decoration: none; display: block; margin-bottom: 6px; font-size: .85rem; }
footer.site-footer a:hover { color: var(--accent); }

/* ===== Responsive ===== */
@media (max-width: 860px) {
  .tool-layout { grid-template-columns: 1fr; }
  .site-nav { display: none; }
  .field-row { grid-template-columns: 1fr; }
  .palette-row { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 520px) {
  .hero { padding: 36px 0 28px; }
  .site-header .bar { flex-wrap: wrap; }
  .search-box { order: 3; max-width: 100%; flex-basis: 100%; }
}