* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.55;
}
h1, h2, h3, .display {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--ink);
}
h1 { font-size: clamp(2.1rem, 4vw, 3.2rem); }
h2 { font-size: clamp(1.5rem, 2.6vw, 2rem); }
h3 { font-size: 1.2rem; font-weight: 600; }
a { color: var(--signal); }
code, .mono { font-family: var(--font-mono); }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: var(--paper);
  border-bottom: 1px solid var(--hairline);
}
.site-header .wrap {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 24px; flex-wrap: wrap; padding-top: 14px;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; padding-bottom: 10px; }
.brand-mark { width: 30px; height: 30px; }
.brand-word { font-family: var(--font-display); font-weight: 700; font-size: 1.15rem; color: var(--ink); }
.led-dot { animation: pulse 2.2s ease-in-out infinite; }
@keyframes pulse { 0%, 100% { opacity: 0.35; } 50% { opacity: 1; } }

.tabs { display: flex; gap: 4px; list-style: none; margin: 0; padding: 0; }
.tabs a {
  display: block; text-decoration: none; color: var(--soft-ink);
  font-family: var(--font-display); font-weight: 600; font-size: 0.95rem;
  padding: 9px 16px; border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  background: var(--hairline); border: 1px solid var(--hairline); border-bottom: none;
}
.tabs a:hover { background: var(--raised-paper); }
.tabs a[aria-current="page"] { background: var(--raised-paper); color: var(--ink); }

.header-flash .tabs a { animation: flash 0.5s ease; }
@keyframes flash { 0% { background: var(--signal); color: #fff; } 100% { background: var(--hairline); } }

/* ---------- Search box ---------- */
.search-box { position: relative; width: 100%; max-width: 340px; }
.search-box input {
  width: 100%; padding: 10px 14px; border-radius: 999px;
  border: 1px solid var(--hairline); background: var(--raised-paper);
  font-family: var(--font-body); font-size: 0.95rem; color: var(--ink);
}
.search-results {
  position: absolute; top: calc(100% + 6px); left: 0; right: 0;
  background: var(--raised-paper); border: 1px solid var(--hairline);
  border-radius: var(--radius-sm); box-shadow: var(--shadow-card);
  max-height: 320px; 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); font-size: 0.92rem; }
.search-results a:hover { background: var(--paper); }
.search-results .cat { color: var(--soft-ink); font-size: 0.78rem; }

/* ---------- Badges ---------- */
.badge { display: inline-block; padding: 3px 11px; border-radius: 999px; font-size: 0.75rem; font-weight: 600; font-family: var(--font-display); }
.badge-established { background: #DDEAE4; color: var(--signal-dark); }
.badge-emerging { background: #F1E1D0; color: var(--amber); }
.badge-speculative { background: #E4E3DD; color: var(--grey-status); }

/* ---------- Cards ---------- */
.card {
  background: var(--raised-paper); border: 1px solid var(--hairline);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-card);
  padding: 24px;
}
.tool-card {
  display: block; text-decoration: none; color: var(--ink);
  background: var(--raised-paper); border: 1px solid var(--hairline);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-card);
  padding: 18px 20px; transition: box-shadow 0.15s, transform 0.15s;
}
.tool-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-1px); }
.tool-card h3 { margin: 6px 0 4px; }
.tool-card p { margin: 0; color: var(--soft-ink); font-size: 0.92rem; }
.card-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px;
}
@media (max-width: 640px) { .card-grid { grid-template-columns: 1fr; } }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; padding: 10px 20px; border-radius: 999px;
  border: 1px solid var(--signal); color: var(--signal); background: transparent;
  font-family: var(--font-display); font-weight: 600; font-size: 0.95rem;
  text-decoration: none; cursor: pointer;
}
.btn-primary { background: var(--signal); color: #fff; }
.btn-primary:hover { background: var(--signal-dark); border-color: var(--signal-dark); }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }

/* ---------- Tool page ---------- */
.breadcrumb { font-size: 0.85rem; color: var(--soft-ink); margin-bottom: 14px; }
.breadcrumb a { color: var(--soft-ink); }
.tool-header { margin-bottom: 8px; }
.tool-limits { color: var(--soft-ink); font-size: 0.9rem; margin-bottom: 18px; }

.variant-switch {
  display: flex; gap: 8px; flex-wrap: wrap; margin: 10px 0 20px;
  padding: 12px 16px; background: var(--raised-paper); border: 1px solid var(--hairline);
  border-radius: var(--radius-sm); font-size: 0.9rem;
}

.dropzone {
  border: 2px dashed var(--hairline); border-radius: var(--radius-lg);
  padding: 40px 24px; text-align: center; background: var(--raised-paper);
  cursor: pointer;
}
.dropzone.dragover { border-color: var(--signal); background: #E7F0EC; }
.dropzone input[type="file"] { display: none; }
.dropzone .hint { color: var(--soft-ink); font-size: 0.88rem; margin-top: 6px; }

.file-row {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 14px 18px; background: var(--raised-paper); border: 1px solid var(--hairline);
  border-radius: var(--radius-sm); margin-top: 16px;
}
.file-row .name { font-family: var(--font-mono); font-size: 0.88rem; word-break: break-all; }
.progress { height: 6px; background: var(--hairline); border-radius: 3px; overflow: hidden; margin-top: 10px; }
.progress-bar { height: 100%; width: 0%; background: var(--signal); transition: width 0.2s; }

.spec-warning {
  margin-top: 16px; padding: 14px 18px; border-radius: var(--radius-sm);
  border: 1px solid #E3C7A8; background: #FBF1E5; color: #6B4A22; font-size: 0.9rem;
}
.spec-warning.danger { border-color: #E0B7AF; background: #FBEDEA; color: var(--danger); }

/* Quick-switcher */
.quick-switch { margin: 24px 0; }
.quick-switch h3 { margin-bottom: 10px; }
.pill-row { display: flex; flex-wrap: wrap; gap: 8px; }
.pill {
  display: inline-block; padding: 7px 15px; border-radius: 999px;
  border: 1px solid var(--hairline); background: var(--raised-paper);
  color: var(--ink); text-decoration: none; font-size: 0.88rem; font-family: var(--font-display);
}
.pill.current { background: var(--signal); color: #fff; border-color: var(--signal); }
.pill:hover:not(.current) { background: var(--paper); }

/* Prev/next */
.tool-pager {
  display: flex; justify-content: space-between; gap: 16px; margin: 32px 0;
  padding-top: 20px; border-top: 1px solid var(--hairline);
}
.tool-pager a { text-decoration: none; color: var(--ink); max-width: 46%; }
.tool-pager .dir { display: block; font-size: 0.78rem; color: var(--soft-ink); text-transform: uppercase; letter-spacing: 0.04em; }
.tool-pager .next { text-align: right; margin-left: auto; }

/* Related */
.related-tools { margin: 28px 0; }
.related-tools h3 { margin-bottom: 10px; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--hairline); margin-top: 48px; background: var(--raised-paper); }
.footer-brand-row { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; padding: 32px 0 24px; }
.footer-tagline { color: var(--soft-ink); font-size: 0.9rem; margin: 4px 0 0; }
.footer-cards { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; padding-bottom: 28px; }
@media (max-width: 900px) { .footer-cards { grid-template-columns: repeat(2, 1fr); } }
.footer-cat-card { background: var(--paper); border: 1px solid var(--hairline); border-radius: var(--radius-sm); padding: 14px 16px; text-decoration: none; color: var(--ink); }
.footer-cat-card:hover { background: #fff; }
.footer-cat-card p { margin: 4px 0 0; color: var(--soft-ink); font-size: 0.82rem; }

.footer-links { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; padding: 24px 0; border-top: 1px solid var(--hairline); }
@media (max-width: 900px) { .footer-links { grid-template-columns: repeat(2, 1fr); } }
.footer-links h4 { font-family: var(--font-display); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--soft-ink); margin: 0 0 10px; }
.footer-links ul { list-style: none; margin: 0; padding: 0; }
.footer-links li { margin-bottom: 6px; }
.footer-links a { color: var(--ink); text-decoration: none; font-size: 0.88rem; }
.footer-links a:hover { color: var(--signal); }
.footer-links .empty { color: var(--soft-ink); font-size: 0.85rem; font-style: italic; }

.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; padding: 16px 0; border-top: 1px solid var(--hairline); font-size: 0.82rem; color: var(--soft-ink); }
.footer-bottom a { color: var(--soft-ink); margin-left: 14px; }