:root {
  --paper: #F3F4F1;
  --card: #FFFFFF;
  --ink: #14181B;
  --ink-soft: #565D63;
  --ink-faint: #8A9096;
  --line: #DEDFD8;
  --line-soft: #EAEAE5;
  --accent: #3B4FE0;
  --accent-soft: #EDEFFC;
  --accent-ink: #FFFFFF;
  --radius: 12px;
  --radius-sm: 7px;
  --shadow-sm: 0 1px 2px rgba(20, 24, 27, 0.05), 0 1px 1px rgba(20, 24, 27, 0.04);
  --shadow-md: 0 12px 24px -12px rgba(20, 24, 27, 0.22), 0 2px 6px rgba(20, 24, 27, 0.06);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --font-display: "Space Grotesk", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Inter", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --maxw: 1180px;
  color-scheme: light;
}

html[data-theme="dark"] {
  --paper: #131519;
  --card: #1B1E23;
  --ink: #F1F2EF;
  --ink-soft: #AFB5BC;
  --ink-faint: #767D85;
  --line: #2B2F35;
  --line-soft: #23262B;
  --accent: #8B9BFF;
  --accent-soft: #22263F;
  --accent-ink: #14181B;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 16px 32px -14px rgba(0, 0, 0, 0.55), 0 2px 8px rgba(0, 0, 0, 0.35);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.25s var(--ease), color 0.25s var(--ease);
}

img { max-width: 100%; display: block; }
a { color: inherit; }
::selection { background: var(--accent); color: var(--accent-ink); }

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: 10px 16px;
  z-index: 100;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus { left: 12px; top: 12px; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---------- Header ---------- */
.site-header {
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 30;
  -webkit-backdrop-filter: blur(10px) saturate(1.4);
  backdrop-filter: blur(10px) saturate(1.4);
}
@supports (backdrop-filter: blur(1px)) {
  .site-header { background: color-mix(in srgb, var(--paper) 82%, transparent); }
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-top: 16px;
  padding-bottom: 16px;
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
}
.brand-mark {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  background: var(--ink);
  color: var(--paper);
  padding: 3px 7px;
  border-radius: var(--radius-sm);
  transition: transform 0.2s var(--ease);
}
.brand:hover .brand-mark { transform: rotate(-4deg); }
.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 21px;
  letter-spacing: -0.01em;
}
.header-right {
  display: flex;
  align-items: center;
  gap: 14px;
}
.header-note {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
  white-space: nowrap;
}
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink-soft);
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), transform 0.2s var(--ease);
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }
.theme-toggle svg { width: 17px; height: 17px; }
.theme-toggle .icon-moon { display: none; }
html[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
html[data-theme="dark"] .theme-toggle .icon-moon { display: block; }

/* ---------- Hero ---------- */
.hero {
  padding: 60px 0 30px;
  border-bottom: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image: radial-gradient(circle, var(--line) 1px, transparent 1px);
  background-size: 24px 24px;
  background-position: -8px -8px;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 85%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 85%);
  pointer-events: none;
}
.hero .wrap { position: relative; z-index: 1; }
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent-soft);
  padding: 5px 10px 5px 8px;
  border-radius: 999px;
}
.eyebrow .pulse {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 60%, transparent);
  animation: pulse 2.2s var(--ease) infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 45%, transparent); }
  70% { box-shadow: 0 0 0 7px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(34px, 5vw, 54px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
  max-width: 19ch;
}
.hero p.lede {
  font-size: 18px;
  color: var(--ink-soft);
  max-width: 58ch;
  margin: 0 0 30px;
}
.hero-stats {
  display: flex;
  gap: 34px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-soft);
}
.hero-stats strong {
  font-family: var(--font-display);
  font-size: 24px;
  color: var(--ink);
  display: block;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* ---------- Controls (search + filter) ---------- */
.controls {
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 65px;
  background: var(--paper);
  z-index: 20;
}
.search-row {
  display: flex;
  gap: 12px;
  margin-bottom: 14px;
}
.search-input {
  flex: 1;
  min-width: 0;
  font-family: var(--font-body);
  font-size: 15px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: var(--radius);
  color: var(--ink);
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.search-input:focus-visible {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
  outline: none;
}
.search-input::placeholder { color: var(--ink-faint); }
.result-count {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
  align-self: center;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}
.filters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.chip {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink-soft);
  padding: 7px 13px;
  border-radius: 999px;
  cursor: pointer;
  line-height: 1;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  transition: border-color 0.15s var(--ease), color 0.15s var(--ease), background 0.15s var(--ease), transform 0.15s var(--ease);
}
.chip:hover { border-color: var(--ink-faint); transform: translateY(-1px); }
.chip:active { transform: translateY(0); }
.chip[aria-current="page"], .chip[aria-pressed="true"] {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.chip .dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  margin-right: 7px;
  vertical-align: middle;
}

/* ---------- Grid & cards ---------- */
main { padding: 34px 0 80px; }
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(258px, 1fr));
  gap: 16px;
}
@keyframes cardIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}
.card {
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
  animation: cardIn 0.5s var(--ease) both;
  animation-delay: calc(min(var(--i, 0), 20) * 14ms);
}
.card:hover {
  border-color: var(--tab, var(--accent));
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.card-tab {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: #fff;
  padding: 6px 12px;
  background: var(--tab, var(--accent));
  background: linear-gradient(135deg, var(--tab, var(--accent)), color-mix(in srgb, var(--tab, var(--accent)) 65%, black 15%));
}
.card-link {
  text-decoration: none;
  color: var(--ink);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}
.card-top {
  display: flex;
  align-items: center;
  gap: 12px;
}
.card-logo {
  width: 38px;
  height: 38px;
  border-radius: 9px;
  object-fit: contain;
  background: var(--paper);
  border: 1px solid var(--line-soft);
  padding: 5px;
  flex-shrink: 0;
  transition: transform 0.2s var(--ease);
}
.card:hover .card-logo { transform: scale(1.06); }
.card-title {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  margin: 0;
  letter-spacing: -0.01em;
}
.card-category {
  font-size: 12px;
  color: var(--ink-faint);
}
.card-desc {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0;
  flex: 1;
}
.card-cta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.2s var(--ease);
}
.card:hover .card-cta { gap: 8px; }

.empty-state {
  padding: 60px 20px;
  text-align: center;
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 14px;
  display: none;
}

/* ---------- Category legend ---------- */
.legend {
  padding: 40px 0;
  border-top: 1px solid var(--line);
  margin-top: 24px;
}
.legend h2 {
  font-family: var(--font-display);
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  margin: 0 0 20px;
}
.legend-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px;
}
.legend-item {
  font-size: 13px;
  color: var(--ink-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
  text-decoration: none;
  display: block;
  background: var(--card);
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
a.legend-item:hover { border-color: var(--tab, var(--accent)); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.legend-item .name {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
  font-size: 14px;
}
.legend-item p { margin: 0; }

/* ---------- FAQ ---------- */
.faq {
  padding: 10px 0 46px;
  border-top: 1px solid var(--line);
}
.faq h2 {
  font-family: var(--font-display);
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  margin: 36px 0 18px;
}
.faq-list { display: flex; flex-direction: column; gap: 10px; max-width: 74ch; }
.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  overflow: hidden;
}
.faq-item summary {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 18px;
  color: var(--ink-faint);
  transition: transform 0.2s var(--ease);
  flex-shrink: 0;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p {
  margin: 0;
  padding: 0 18px 16px;
  color: var(--ink-soft);
  font-size: 14px;
  max-width: 68ch;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 30px 0;
  text-align: center;
}
.site-footer a {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-soft);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}
.site-footer a:hover { color: var(--accent); }

/* ---------- Detail page ---------- */
.breadcrumb {
  padding: 20px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
  margin: 0;
}
.breadcrumb a { text-decoration: none; color: var(--ink-soft); }
.breadcrumb a:hover { color: var(--accent); }

.detail-header {
  padding: 32px 0 36px;
  border-bottom: 1px solid var(--line);
}
.detail-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: #fff;
  background: var(--tab, var(--accent));
  background: linear-gradient(135deg, var(--tab, var(--accent)), color-mix(in srgb, var(--tab, var(--accent)) 65%, black 15%));
  padding: 5px 11px;
  border-radius: var(--radius-sm);
  margin-bottom: 22px;
  text-decoration: none;
}
.detail-top {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.detail-logo {
  width: 72px;
  height: 72px;
  border-radius: 16px;
  object-fit: contain;
  background: var(--card);
  border: 1px solid var(--line);
  padding: 10px;
  box-shadow: var(--shadow-sm);
}
.detail-title h1 {
  font-family: var(--font-display);
  font-size: clamp(30px, 4vw, 44px);
  margin: 0 0 6px;
  letter-spacing: -0.02em;
}
.detail-meta {
  font-size: 14px;
  color: var(--ink-soft);
}
.detail-meta a { color: var(--accent); text-decoration: none; }
.detail-meta a:hover { text-decoration: underline; }

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 0;
}
.pill {
  font-family: var(--font-mono);
  font-size: 12px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink-soft);
  padding: 6px 12px;
  border-radius: 999px;
}

.detail-body {
  padding: 40px 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 52px;
}
.detail-body .lede {
  font-size: 19px;
  color: var(--ink);
  margin: 0 0 12px;
  max-width: 62ch;
}
.detail-body .sub {
  font-size: 15px;
  color: var(--ink-soft);
  max-width: 62ch;
}
.cta-row { margin-top: 26px; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
  padding: 13px 20px;
  border-radius: var(--radius);
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), background 0.2s var(--ease), color 0.2s var(--ease);
}
.btn:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.btn .arrow { transition: transform 0.2s var(--ease); }
.btn:hover .arrow { transform: translate(2px, -2px); }

.specs {
  border: 1px solid var(--line);
  border-left: 3px solid var(--tab, var(--accent));
  background: var(--card);
  border-radius: var(--radius);
  padding: 18px;
  height: fit-content;
  font-size: 13px;
  box-shadow: var(--shadow-sm);
}
.specs dt {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
  margin-top: 14px;
}
.specs dt:first-child { margin-top: 0; }
.specs dd {
  margin: 4px 0 0;
  color: var(--ink);
}
.specs a { color: var(--accent); text-decoration: none; }
.specs a:hover { text-decoration: underline; }

.related {
  padding: 10px 0 70px;
  border-top: 1px solid var(--line);
}
.related h2 {
  font-family: var(--font-display);
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  margin: 36px 0 18px;
}

/* ---------- Category page hero ---------- */
.cat-hero {
  padding: 44px 0 30px;
  border-bottom: 1px solid var(--line);
}
.cat-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 40px);
  letter-spacing: -0.02em;
  margin: 14px 0 12px;
}
.cat-hero p.lede {
  font-size: 16px;
  color: var(--ink-soft);
  max-width: 60ch;
  margin: 0;
}

/* ---------- 404 ---------- */
.notfound {
  padding: 100px 0;
  text-align: center;
}
.notfound .code {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 14px;
  margin-bottom: 14px;
}
.notfound h1 {
  font-family: var(--font-display);
  font-size: 36px;
  margin: 0 0 14px;
}
.notfound p { color: var(--ink-soft); margin-bottom: 26px; }

@media (max-width: 760px) {
  .wrap { padding: 0 18px; }
  .controls { top: 61px; }
  .detail-body { grid-template-columns: 1fr; }
  .hero { padding: 44px 0 26px; }
  .search-row { flex-direction: column; }
  .result-count { align-self: flex-start; }
  .filters {
    flex-wrap: nowrap;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    -webkit-overflow-scrolling: touch;
    margin: 0 -18px;
    padding: 0 18px 6px;
    scrollbar-width: thin;
    mask-image: linear-gradient(90deg, transparent, #000 18px, #000 calc(100% - 18px), transparent);
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 18px, #000 calc(100% - 18px), transparent);
  }
  .filters::-webkit-scrollbar { height: 4px; }
  .filters::-webkit-scrollbar-thumb { background: var(--line); border-radius: 2px; }
  .chip { flex-shrink: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}