/* OKB Parts Catalogue — landing page styles.
   Same color palette / fonts / hairline aesthetic as the per-model
   parts manual pages (rm4000-styles.css). Information-first, minimal
   decoration: model cards with image + ID + spec, click to enter. */

:root {
  --ink:        #111418;
  --ink-soft:   #2c3137;
  --ink-mute:   #6a7079;
  --ink-faint:  #aab0b8;

  --rule:        #d6d9de;
  --rule-soft:   #e6e8ec;
  --rule-strong: #9aa0a8;

  --paper:      #ffffff;
  --paper-cool: #f6f7f9;
  --paper-head: #eef0f3;

  --highlight:  #ea580c;
  --yellow:     #f5c518;

  --mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --sans: "Inter", "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  background: var(--paper);
  font-family: var(--sans);
  color: var(--ink);
  font-size: 13px;
  font-feature-settings: "tnum", "ss01";
  -webkit-font-smoothing: antialiased;
}

/* ─── Toolbar ─── */
.toolbar {
  background: var(--paper);
  border-bottom: 1px solid var(--rule-strong);
  padding: 0 18px;
  height: 44px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  position: sticky;
  top: 0;
  z-index: 10;
}
.toolbar .mark {
  width: 12px; height: 12px;
  background: var(--yellow);
  border: 1px solid var(--ink);
  flex: none;
}
.toolbar h1 {
  margin: 0;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--ink);
}
.toolbar .count {
  margin-left: auto;
  color: var(--ink-mute);
  font-size: 10px;
  letter-spacing: 0.06em;
}

/* ─── Series filter tabs ─── */
.series-tabs {
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
  padding: 0 18px;
  display: flex;
  gap: 0;
  overflow-x: auto;
  position: sticky;
  top: 44px;       /* sit just below the toolbar (which is 44px) */
  z-index: 9;
}
.series-tab {
  background: var(--paper);
  border: 0;
  border-right: 1px solid var(--rule);
  border-bottom: 2px solid transparent;
  padding: 9px 14px;
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-mute);
  cursor: pointer;
  white-space: nowrap;
  transition: background 100ms, color 100ms;
}
.series-tab:hover {
  background: var(--paper-cool);
  color: var(--ink);
}
.series-tab.active {
  color: var(--ink);
  background: var(--paper);
  border-bottom-color: var(--highlight);
  font-weight: 600;
}
.series-tab .tab-id {
  font-weight: 600;
  color: var(--ink);
  font-size: 10px;
}
.series-tab.empty .tab-id { color: var(--ink-faint); }
.series-tab.active .tab-id { color: var(--highlight); }
.series-tab .tab-name {
  font-family: var(--sans);
  font-size: 11.5px;
  letter-spacing: 0;
  text-transform: none;
  font-weight: 500;
  color: inherit;
}
.series-tab.empty {
  color: var(--ink-faint);
}
.series-tab.empty .tab-name { color: var(--ink-faint); }
.series-tab .tab-count {
  font-variant-numeric: tabular-nums;
  background: var(--paper-cool);
  border: 1px solid var(--rule);
  padding: 1px 6px;
  font-size: 9.5px;
  min-width: 22px;
  text-align: center;
  color: var(--ink-mute);
}
.series-tab.empty .tab-count { color: var(--ink-faint); }
.series-tab.active .tab-count {
  background: var(--paper);
  border-color: var(--ink);
  color: var(--ink);
}

/* ─── Cards container (now just a content wrapper) ─── */
.cards {
  padding: 24px 18px;
  max-width: 1400px;
  margin: 0 auto;
}

/* Section wrapper used when "ALL" is the active tab — one per series. */
.series-section { margin-bottom: 28px; }
.series-section:last-child { margin-bottom: 0; }

.series-header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 0 0 8px;
  border-bottom: 1px solid var(--rule-soft);
  margin-bottom: 12px;
  font-family: var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.series-header .series-id {
  font-size: 11px;
  font-weight: 600;
  color: var(--ink);
}
.series-header .series-name {
  font-size: 11px;
  color: var(--ink-soft);
  letter-spacing: 0.04em;
  font-family: var(--sans);
  text-transform: none;
}
.series-header .series-count {
  margin-left: auto;
  font-size: 9.5px;
  color: var(--ink-mute);
  font-variant-numeric: tabular-nums;
}

/* Inner grid — renders both inside a .series-section (ALL view) and as
   the only child of .cards when a single-series tab is active. */
.series-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.card {
  background: var(--paper);
  border: 1px solid var(--rule);
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  transition: border-color 100ms, box-shadow 100ms;
  min-height: 320px;
}
.card:hover {
  border-color: var(--ink);
  box-shadow: 0 0 0 1px var(--ink);
}
.card:active { box-shadow: inset 3px 0 0 0 var(--highlight); }

/* Image area */
.card-img {
  background: var(--paper-cool);
  border-bottom: 1px solid var(--rule);
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 200px;
  overflow: hidden;
}
.card-img img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

/* Meta block */
.card-meta {
  padding: 12px 14px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.card-series {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.card-name {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.005em;
  color: var(--ink);
  line-height: 1.15;
}

.card-title {
  font-size: 12px;
  color: var(--ink-soft);
  letter-spacing: 0.01em;
}

.card-spec {
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px solid var(--rule-soft);
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 2px 8px;
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-soft);
}
.card-spec dt {
  color: var(--ink-mute);
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin: 0;
  align-self: center;
}
.card-spec dd {
  margin: 0;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
  align-self: center;
}

/* Empty state — when models.js has no entries */
.empty {
  padding: 60px 24px;
  text-align: center;
  color: var(--ink-faint);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}