/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-hairline);
}

.site-header .container {
  display: flex;
  align-items: center;
  gap: var(--sp-24);
  height: 60px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 500;
  color: var(--color-white);
  flex-shrink: 0;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: var(--sp-24);
  font-size: 14px;
  color: var(--color-steel);
}
.primary-nav a { transition: color .15s ease; }
.primary-nav a:hover, .primary-nav a.active { color: var(--color-white); }

.header-search {
  flex: 1;
  max-width: 420px;
  margin: 0 auto;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-16);
  flex-shrink: 0;
}

.repo-link {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--color-steel);
}
.repo-link:hover { color: var(--color-accent); }

@media (max-width: 900px) {
  .primary-nav, .header-search { display: none; }
}

/* ---------- Search input ---------- */
.search-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}
.search-input-wrap svg {
  position: absolute;
  left: 12px;
  color: var(--color-steel);
  pointer-events: none;
}
.search-input {
  width: 100%;
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-sm);
  padding: 9px 12px 9px 36px;
  font-size: 14px;
  color: var(--color-white);
  transition: border-color .15s ease;
}
.search-input::placeholder { color: var(--color-ash); }
.search-input:focus { outline: none; border-color: var(--color-accent); }

/* ---------- Hero ---------- */
.hero {
  padding: var(--sp-48) 0 var(--sp-32);
  border-bottom: 1px solid var(--color-hairline);
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-accent);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: var(--sp-16);
}
.hero-eyebrow::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 8px var(--color-accent);
}
.hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-heading-xl);
  line-height: 1.1;
  max-width: 820px;
  margin-bottom: var(--sp-16);
}
.hero p.lede {
  color: var(--color-steel);
  font-size: var(--text-subheading);
  line-height: var(--leading-subheading);
  max-width: 640px;
  margin-bottom: var(--sp-32);
}
.hero-actions {
  display: flex;
  gap: var(--sp-16);
  align-items: center;
  margin-bottom: var(--sp-32);
  flex-wrap: wrap;
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--color-hairline);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.stat-cell {
  background: var(--color-canvas);
  padding: var(--sp-16) var(--sp-24);
}
.stat-cell .value {
  font-size: var(--text-heading);
  font-weight: 500;
  color: var(--color-white);
}
.stat-cell .value .accent-text { font-weight: 500; }
.stat-cell .label {
  font-size: 12px;
  color: var(--color-steel);
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
@media (max-width: 720px) {
  .stat-row { grid-template-columns: repeat(2, 1fr); }
  .hero h1 { font-size: 28px; }
}

/* ---------- Section ---------- */
.section {
  padding: var(--sp-32) 0;
}
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--sp-16);
  margin-bottom: var(--sp-24);
  flex-wrap: wrap;
}
.section-head h2 {
  font-family: var(--font-display);
  font-size: var(--text-heading);
}
.section-head .section-sub {
  color: var(--color-steel);
  font-size: 13px;
}

/* ---------- Category grid ---------- */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: var(--sp-16);
}
.category-card {
  display: flex;
  flex-direction: column;
  gap: var(--sp-16);
  padding: var(--sp-16);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-lg);
  background: var(--color-canvas);
  transition: border-color .15s ease, transform .15s ease, background .15s ease;
  cursor: pointer;
}
.category-card:hover {
  border-color: var(--color-accent);
  background: var(--color-carbon);
}
.category-card .icon-wrap {
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-hairline);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-accent);
  background: var(--color-carbon);
}
.category-card .cat-name {
  font-family: var(--font-display);
  font-size: var(--text-subheading);
  color: var(--color-white);
}
.category-card .cat-count {
  font-size: 12px;
  color: var(--color-steel);
}

/* ---------- Filter bar ---------- */
.filter-bar {
  display: flex;
  align-items: center;
  gap: var(--sp-8);
  overflow-x: auto;
  padding-bottom: 4px;
  margin-bottom: var(--sp-24);
}

/* ---------- Skills grid / table ---------- */
.skills-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-16);
  margin-bottom: var(--sp-16);
  flex-wrap: wrap;
}
.result-count {
  font-size: 13px;
  color: var(--color-steel);
}
.view-toggle {
  display: flex;
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.view-toggle button {
  background: transparent;
  border: none;
  padding: 6px 10px;
  color: var(--color-steel);
  cursor: pointer;
  display: flex;
  align-items: center;
}
.view-toggle button.active { background: var(--color-carbon); color: var(--color-accent); }

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--sp-16);
}

.skill-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: var(--sp-16);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-lg);
  background: var(--color-canvas);
  transition: border-color .15s ease, background .15s ease;
  cursor: pointer;
  min-height: 176px;
}
.skill-card:hover { border-color: var(--color-accent); background: var(--color-carbon); }
.skill-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
}
.skill-card .skill-name {
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--color-white);
  word-break: break-word;
}
.skill-card .skill-slug {
  font-size: 11px;
  color: var(--color-ash);
}
.skill-card .skill-desc {
  color: var(--color-steel);
  font-size: 13px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}
.skill-card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
}
.cat-tag {
  font-size: 11px;
  color: var(--color-accent);
  border: 1px solid var(--color-hairline);
  padding: 3px 8px;
  border-radius: var(--radius-full);
  background: var(--color-carbon);
}

/* ---------- Table view ---------- */
.skills-table-wrap {
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.skills-table {
  width: 100%;
  border-collapse: collapse;
}
.skills-table th {
  text-align: left;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-steel);
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-hairline);
  font-weight: 400;
}
.skills-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-hairline);
  font-size: 13px;
  vertical-align: top;
}
.skills-table tr:last-child td { border-bottom: none; }
.skills-table tbody tr { cursor: pointer; transition: background .1s ease; }
.skills-table tbody tr:hover { background: var(--color-carbon); }
.skills-table .name-cell { color: var(--color-white); font-family: var(--font-display); }
.skills-table .desc-cell { color: var(--color-steel); max-width: 480px; }

/* ---------- Platform grid (homepage) ---------- */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--sp-16);
}
.platform-tile {
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-lg);
  padding: var(--sp-16);
  text-align: center;
  background: var(--color-canvas);
  transition: border-color .15s ease;
}
.platform-tile:hover { border-color: var(--color-accent); }
.platform-tile .glyph {
  width: 40px; height: 40px;
  margin: 0 auto var(--sp-8);
  border-radius: var(--radius-sm);
  background: var(--color-carbon);
  border: 1px solid var(--color-hairline);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-white);
  font-family: var(--font-display);
  font-weight: 500;
}
.platform-tile .pname { font-size: 13px; color: var(--color-white); }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--color-hairline);
  padding: var(--sp-24) 0;
  margin-top: var(--sp-48);
}
.site-footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sp-16);
}
.footer-links {
  display: flex;
  gap: var(--sp-24);
  font-size: 12px;
  color: var(--color-ash);
}

/* ---------- Skill detail page ---------- */
.breadcrumbs {
  font-size: 12px;
  color: var(--color-steel);
  margin-bottom: var(--sp-16);
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.detail-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--sp-24);
  margin-bottom: var(--sp-24);
  flex-wrap: wrap;
}
.detail-title {
  font-family: var(--font-display);
  font-size: var(--text-heading-lg);
  margin-bottom: 6px;
}
.detail-slug {
  color: var(--color-ash);
  font-size: 13px;
}
.detail-desc {
  color: var(--color-steel);
  font-size: var(--text-subheading);
  line-height: 1.5;
  max-width: 760px;
  margin: var(--sp-16) 0 var(--sp-24);
}

.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--color-hairline);
  margin-bottom: var(--sp-24);
  overflow-x: auto;
}
.tab-btn {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 10px 16px;
  color: var(--color-steel);
  font-size: 14px;
  font-family: var(--font-mono);
  cursor: pointer;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 8px;
}
.tab-btn:hover { color: var(--color-white); }
.tab-btn.active { color: var(--color-accent); border-bottom-color: var(--color-accent); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

.code-block {
  position: relative;
  background: var(--color-carbon);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-lg);
  padding: var(--sp-16);
  font-size: 13px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--color-white);
  max-height: 480px;
  overflow-y: auto;
}
.copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  color: var(--color-steel);
  border-radius: var(--radius-sm);
  padding: 5px 10px;
  font-size: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
}
.copy-btn:hover { color: var(--color-accent); border-color: var(--color-accent); }
.copy-btn.copied { color: var(--color-accent); border-color: var(--color-accent); }

.platform-steps {
  list-style: none;
  margin: 0 0 var(--sp-24);
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.platform-steps li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  color: var(--color-steel);
  font-size: 13px;
  line-height: 1.6;
}
.platform-steps li .step-num {
  flex-shrink: 0;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--color-carbon);
  border: 1px solid var(--color-hairline);
  color: var(--color-accent);
  font-size: 11px;
  display: flex; align-items: center; justify-content: center;
}
.platform-note {
  border-left: 2px solid var(--color-accent);
  padding: 10px 16px;
  background: var(--color-carbon);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 13px;
  color: var(--color-steel);
  margin-top: var(--sp-16);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--sp-16);
}

.empty-state {
  text-align: center;
  padding: var(--sp-48) var(--sp-16);
  color: var(--color-steel);
}
.empty-state .big-icon { color: var(--color-hairline); margin-bottom: var(--sp-16); }

.page-jump {
  display: flex;
  align-items: center;
  gap: 8px;
  justify-content: center;
  margin-top: var(--sp-32);
}

.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-accent-text);
  border: none;
  display: none;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-subtle-2);
  z-index: 90;
}
.back-to-top.show { display: flex; }