/* Slate Truck World — catalog-first industrial design system
   Research: docs/buyer-ux-research.md */

:root {
  --ink: #0e0e0e;
  --charcoal: #1a1a1a;
  --steel: #4c5a64;
  --muted: #6e767c;
  --border: #d4d0c8;
  --concrete: #e6e2db;
  --paper: #f3f1ec;
  --white: #ffffff;
  --accent: #c45c26;
  --accent-hover: #a84c1e;
  --radius: 3px;
  --max: 1200px;
  --font: "IBM Plex Sans", "Segoe UI", system-ui, -apple-system, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4.5rem;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--steel); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--ink); }
h1, h2, h3, h4 {
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0 0 0.5em;
  color: var(--ink);
}
h1 { font-size: clamp(1.85rem, 4.2vw, 2.75rem); }
h2 { font-size: clamp(1.35rem, 2.6vw, 1.75rem); }
h3 { font-size: 1.05rem; }
p { margin: 0 0 1em; }
ul { margin: 0 0 1em; padding-left: 1.25em; }

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); border: 0;
}

/* —— Disclaimer —— */
.disclaimer-bar {
  background: var(--ink);
  color: var(--muted);
  font-size: 0.75rem;
  padding: 0.5rem 0;
  text-align: center;
  letter-spacing: 0.01em;
  border-bottom: 1px solid #222;
}
.disclaimer-bar strong {
  color: var(--concrete);
  font-weight: 600;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-right: 0.35rem;
}

/* —— Header —— */
.site-header {
  background: var(--charcoal);
  color: var(--concrete);
  border-bottom: 1px solid #111;
  position: sticky;
  top: 0;
  z-index: 50;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 0;
  min-height: 3.25rem;
}
.logo {
  color: var(--white);
  text-decoration: none;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 0.88rem;
  white-space: nowrap;
}
.logo span { color: var(--muted); font-weight: 400; }
.nav {
  display: flex;
  gap: 0.15rem 1.35rem;
  flex-wrap: wrap;
  align-items: center;
}
.nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.875rem;
  letter-spacing: 0.02em;
  padding: 0.35rem 0;
  border-bottom: 2px solid transparent;
}
.nav a:hover { color: var(--white); }
.nav a[aria-current="page"] {
  color: var(--white);
  border-bottom-color: var(--accent);
}
.nav a.nav-shop {
  color: var(--concrete);
  font-weight: 500;
}
.nav a.nav-shop:hover,
.nav a.nav-shop[aria-current="page"] {
  color: var(--white);
}
.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid #3a3a3a;
  color: var(--concrete);
  border-radius: var(--radius);
  padding: 0.4rem 0.65rem;
  font: inherit;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  cursor: pointer;
}
.nav-toggle:hover { border-color: var(--muted); color: var(--white); }

/* —— Buttons —— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.72rem 1.25rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 500;
  font-family: inherit;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  letter-spacing: 0.02em;
  line-height: 1.2;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}
.btn-primary {
  background: var(--accent);
  color: var(--white);
  border-color: var(--accent);
}
.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: var(--white);
}
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--border);
}
.btn-ghost:hover {
  border-color: var(--ink);
  color: var(--ink);
}
.btn-buy {
  background: var(--ink);
  color: var(--white);
  border-color: var(--ink);
}
.btn-buy:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--white);
}
.btn-sm {
  padding: 0.5rem 0.85rem;
  font-size: 0.8rem;
}

/* —— Hero —— */
.hero-visual {
  position: relative;
  padding: 0;
  background: var(--ink);
  overflow: hidden;
  min-height: clamp(280px, 42vw, 420px);
  display: flex;
  align-items: flex-end;
}
.hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-media .hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 42%;
  opacity: 0.78;
}
.hero-scrim {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(100deg, rgba(14,14,14,0.92) 0%, rgba(14,14,14,0.55) 42%, rgba(14,14,14,0.2) 100%),
    linear-gradient(0deg, rgba(14,14,14,0.75) 0%, transparent 50%);
}
.hero-content {
  position: relative;
  z-index: 1;
  padding: clamp(2.5rem, 6vw, 4rem) 0 clamp(2rem, 4vw, 3rem);
  color: var(--concrete);
  max-width: var(--max);
}
.hero-kicker {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.85rem;
  font-weight: 500;
}
.hero-visual h1 {
  color: var(--white);
  max-width: 12em;
  margin-bottom: 0.65rem;
}
.hero-visual p.lead {
  color: var(--concrete);
  max-width: 32em;
  font-size: 1.05rem;
  margin-bottom: 0;
  line-height: 1.5;
}
.hero-actions {
  display: flex;
  gap: 0.65rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}
.hero-visual .btn-ghost {
  color: var(--concrete);
  border-color: rgba(230, 226, 219, 0.35);
}
.hero-visual .btn-ghost:hover {
  border-color: var(--white);
  color: var(--white);
}
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem 1.75rem;
  margin-top: 1.75rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255,255,255,0.12);
}
.hero-stat {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}
.hero-stat strong {
  display: block;
  font-family: var(--font);
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  text-transform: none;
  color: var(--white);
  font-weight: 600;
  margin-bottom: 0.15rem;
}
.hero-credit {
  margin-top: 1rem;
  margin-bottom: 0;
  font-size: 0.68rem;
  color: var(--muted);
  letter-spacing: 0.02em;
}

/* —— Sections —— */
.section {
  padding: var(--space-8) 0;
}
.section-tight {
  padding: var(--space-7) 0;
}
.section-shop {
  background: var(--white);
  border-bottom: 1px solid var(--border);
}
.section-muted {
  background: var(--paper);
}
.section-dark {
  background: var(--charcoal);
  color: var(--concrete);
  border-top: 1px solid #111;
}
.section-dark h2 { color: var(--white); }
.section-dark .section-head a { color: var(--muted); }
.section-dark .section-head a:hover { color: var(--white); }
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.75rem;
}
.section-head h2 { margin: 0; }
.section-kicker {
  display: block;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.4rem;
  font-weight: 500;
}
.section-head a {
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--steel);
}
.section-head a:hover { color: var(--ink); }
.section-intro {
  max-width: 36em;
  color: var(--steel);
  margin: -0.5rem 0 1.75rem;
  font-size: 0.98rem;
}

/* —— Category tiles —— */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.75rem;
}
.cat-tile {
  position: relative;
  padding: 0;
  min-height: 148px;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  text-decoration: none;
  background: var(--charcoal);
  color: var(--concrete);
  border-radius: var(--radius);
  border: 1px solid #111;
}
.cat-tile-media {
  position: absolute;
  inset: 0;
}
.cat-tile-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.5;
  transition: opacity 0.2s ease, transform 0.4s ease;
}
.cat-tile:hover .cat-tile-media img {
  opacity: 0.68;
  transform: scale(1.04);
}
.cat-tile-label {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  padding: 1rem 1.05rem;
  background: linear-gradient(0deg, rgba(14,14,14,0.94) 0%, rgba(14,14,14,0.2) 100%);
}
.cat-tile-label strong {
  display: block;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--white);
  letter-spacing: -0.01em;
}
.cat-tile .count {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 0.3rem;
}

/* —— Category chips (PLP) —— */
.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 1.25rem 0 1.75rem;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--white);
  color: var(--steel);
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 500;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}
.chip:hover {
  border-color: var(--ink);
  color: var(--ink);
}
.chip[aria-current="page"],
.chip.is-active {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--white);
}
.chip .chip-count {
  font-family: var(--mono);
  font-size: 0.68rem;
  opacity: 0.7;
}

/* —— Product / news grids —— */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1rem;
}
.grid-products {
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.15rem;
}

/* —— Cards —— */
.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.card:hover {
  border-color: #b8b3aa;
  box-shadow: 0 8px 24px rgba(14, 14, 14, 0.06);
}
.card-body {
  padding: 1rem 1.05rem 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  flex: 1;
}
.card-media {
  display: block;
  background: var(--concrete);
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.card-media .card-img,
.card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}
.card:hover .card-img { transform: scale(1.03); }
.card a.card-title {
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.98rem;
  line-height: 1.35;
  letter-spacing: -0.01em;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card a.card-title:hover { color: var(--accent); }
.meta {
  font-size: 0.78rem;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.65rem;
}
.tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--steel);
  text-decoration: none;
  font-weight: 500;
}
.tag:hover { color: var(--ink); }
.price {
  font-weight: 600;
  color: var(--ink);
  font-size: 1rem;
  letter-spacing: -0.01em;
  margin-top: 0.15rem;
}
.card-foot {
  margin-top: auto;
  padding-top: 0.85rem;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  align-items: center;
}
.card-foot .btn { flex: 1 1 auto; min-width: 0; }
.card-foot .link-details {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--steel);
  text-decoration: none;
  padding: 0.35rem 0.15rem;
}
.card-foot .link-details:hover { color: var(--ink); }
.affiliate-note {
  font-size: 0.72rem;
  color: var(--muted);
  margin: 0.35rem 0 0;
  line-height: 1.4;
}

/* —— Compact news rail (home) —— */
.news-rail {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--white);
  overflow: hidden;
}
.news-row {
  display: grid;
  grid-template-columns: 7.5rem 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 1rem 1.15rem;
  text-decoration: none;
  color: inherit;
  border-bottom: 1px solid var(--border);
  transition: background 0.12s ease;
}
.news-row:last-child { border-bottom: none; }
.news-row:hover { background: var(--paper); }
.news-row .source {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  line-height: 1.4;
}
.news-row .source time {
  display: block;
  margin-top: 0.15rem;
  color: var(--steel);
  letter-spacing: 0.02em;
  text-transform: none;
  font-family: var(--font);
  font-size: 0.78rem;
}
.news-row .title {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--ink);
  letter-spacing: -0.01em;
  line-height: 1.35;
  margin: 0;
}
.news-row:hover .title { color: var(--accent); }
.news-row .arrow {
  font-family: var(--mono);
  color: var(--muted);
  font-size: 0.85rem;
}
.news-card .card-media { aspect-ratio: 16 / 9; }
.news-card .source {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--steel);
}
.news-card .summary {
  font-size: 0.88rem;
  color: var(--steel);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* —— Product detail —— */
.breadcrumb {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 1.35rem;
}
.breadcrumb a {
  color: var(--muted);
  text-decoration: none;
}
.breadcrumb a:hover { color: var(--ink); }
.detail-panel {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.detail-layout {
  display: grid;
  gap: 1.75rem;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  align-items: start;
}
.detail-media {
  background: var(--concrete);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}
.detail-img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.dl-grid {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 0.55rem 1rem;
  font-size: 0.92rem;
  margin: 1.25rem 0;
}
.dl-grid dt {
  color: var(--muted);
  font-weight: 500;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding-top: 0.2rem;
}
.dl-grid dd { margin: 0; }

/* —— Forms —— */
.form-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  max-width: 440px;
}
.form-inline {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  align-items: flex-end;
  max-width: 520px;
}
.form-inline .form-row {
  flex: 1 1 220px;
  margin-bottom: 0;
}
.form-row { margin-bottom: 1rem; }
.form-row label {
  display: block;
  font-size: 0.8rem;
  margin-bottom: 0.35rem;
  font-weight: 500;
}
.form-row input,
.form-row textarea {
  width: 100%;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font: inherit;
  background: var(--white);
  color: var(--ink);
}
.form-row input:focus,
.form-row textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: var(--accent);
}
.signup-band {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  align-items: center;
}
.signup-band p { margin-bottom: 0; color: var(--steel); }

/* —— About / prose —— */
.prose { max-width: 42em; }
.prose h2 { margin-top: 2rem; }
.callout {
  background: var(--concrete);
  border-left: 3px solid var(--accent);
  padding: 1rem 1.15rem;
  margin: 1.25rem 0;
  font-size: 0.92rem;
}

/* —— Maker panels —— */
.maker-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-top: 1.5rem;
}
.maker-list .detail-panel h2 {
  margin: 0 0 0.35rem;
  font-size: 1.1rem;
}
.maker-list ul { margin-bottom: 0; }

/* —— Page header (inner) —— */
.page-header {
  margin-bottom: 0.25rem;
}
.page-header h1 { margin-bottom: 0.4rem; }
.page-header p {
  color: var(--steel);
  max-width: 40em;
  margin-bottom: 0;
}

/* —— Footer —— */
.site-footer {
  background: var(--charcoal);
  color: var(--muted);
  padding: 2.75rem 0 2rem;
  margin-top: 0;
  font-size: 0.85rem;
}
.site-footer a { color: var(--concrete); text-decoration: none; }
.site-footer a:hover { color: var(--white); }
.footer-grid {
  display: grid;
  gap: 1.75rem;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  margin-bottom: 2rem;
}
.footer-grid h3 {
  color: var(--white);
  font-family: var(--mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 500;
  margin-bottom: 0.85rem;
}
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin-bottom: 0.45rem; }
.footer-legal {
  border-top: 1px solid #2e2e2e;
  padding-top: 1.35rem;
  color: var(--muted);
  font-size: 0.75rem;
  line-height: 1.65;
}
.footer-legal p { margin-bottom: 0.75rem; }
.footer-legal strong { color: var(--concrete); font-weight: 600; }

.empty {
  color: var(--muted);
  font-style: italic;
  padding: 2rem 0;
}

/* —— Responsive —— */
@media (max-width: 800px) {
  .detail-layout { grid-template-columns: 1fr; }
  .signup-band { grid-template-columns: 1fr; }
  .hero-content { padding-top: 2.5rem; padding-bottom: 2rem; }
  .section { padding: var(--space-7) 0; }
  .news-row {
    grid-template-columns: 1fr auto;
    gap: 0.75rem;
  }
  .news-row .source { grid-column: 1 / -1; }
  .nav-toggle { display: inline-flex; }
  .nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-bottom: 0.5rem;
  }
  .nav.is-open { display: flex; }
  .nav a {
    padding: 0.65rem 0;
    border-bottom: 1px solid #2a2a2a;
  }
  .nav a[aria-current="page"] {
    border-bottom-color: var(--accent);
  }
  .header-inner { flex-wrap: wrap; }
}
@media (max-width: 600px) {
  .dl-grid { grid-template-columns: 1fr; gap: 0.1rem 0; }
  .dl-grid dt { margin-top: 0.55rem; }
  .cat-grid { grid-template-columns: repeat(2, 1fr); gap: 0.55rem; }
  .cat-tile { min-height: 120px; }
  .grid-products { grid-template-columns: 1fr; }
  .hero-stats { gap: 1rem 1.25rem; }
}