:root {
  --bg: #F7F8FA;
  --surface: #FFFFFF;
  --surface-subtle: #F9FAFB;
  --surface-hover: #F4F6F9;
  --border: #ECEEF2;
  --border-hover: #D0D5DD;
  --text-1: #101828;
  --text-2: #475467;
  --text-meta: #667085;

  --primary: #2563EB;
  --primary-hover: #1D4ED8;
  --primary-active: #1949C0;
  --primary-soft: #EAF1FE;

  --danger: #F04438;
  --danger-deep: #B42318;
  --danger-soft: #FEF3F2;

  --tone-energy-rail: #12B76A;
  --tone-energy-soft: #ECFDF3;
  --tone-energy-text: #067647;
  --tone-vision-rail: #F79009;
  --tone-vision-soft: #FFF6E6;
  --tone-vision-text: #B54708;
  --tone-neutral-rail: #667085;
  --tone-neutral-soft: #F2F4F7;
  --tone-neutral-text: #344054;
--tone-vehicle-rail: #0E9384;
--tone-vehicle-soft: #E4FDFB;
--tone-vehicle-text: #0E6E65;
--tone-painting-rail: #7A5AF8;
--tone-painting-soft: #F4F2FF;
--tone-painting-text: #5B21B6;

  --font-sans: Inter, system-ui, -apple-system, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;

  --shadow-sm: 0 2px 4px -1px rgba(16, 24, 40, 0.06);
  --shadow-md: 0 4px 12px -2px rgba(16, 24, 40, 0.08);

  --radius-card: 12px;
  --radius-ctl: 8px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--text-1);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ---------- Top bar ---------- */
.topbar {
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 8px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  font-size: 15px;
  font-weight: 600;
}

.topbar__brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.topbar__logo {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  flex: none;
}

.topbar__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-meta);
  font-size: 13px;
  font-weight: 500;
}

.topbar__count {
  color: var(--text-2);
}

.topbar__sep {
  width: 1px;
  height: 14px;
  background: var(--border-hover);
}

/* ---------- Main ---------- */
.page {
  max-width: 1184px;
  margin: 0 auto;
  padding: 36px 24px 32px;
}

.page__head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.page__title {
  margin: 0;
  font-size: 22px;
  line-height: 1.25;
  font-weight: 700;
  color: var(--text-1);
}

.page__note {
  color: var(--text-meta);
  font-size: 13px;
  font-weight: 500;
}

/* ---------- Grid ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-auto-rows: 1fr;
  gap: 20px;
}

/* ---------- Card ---------- */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 248px;
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  color: inherit;
  text-decoration: none;
  overflow: hidden;
  transition: background-color 200ms ease, border-color 200ms ease,
    box-shadow 200ms ease;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 3px;
  background: var(--rail, var(--tone-neutral-rail));
}

.card:hover {
  background: var(--surface-hover);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}

.card:hover .card__open-label,
.card:hover .card__host,
.card:hover .card__arrow {
  color: var(--primary-hover);
}

.card:active {
  background: var(--surface-subtle);
  border-color: var(--border-hover);
}

.card:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  box-shadow: var(--shadow-sm), 0 0 0 5px rgba(37, 99, 235, 0.16);
}

/* tones */
.card[data-tone="energy"] {
  --rail: var(--tone-energy-rail);
  --tone-soft: var(--tone-energy-soft);
  --tone-text: var(--tone-energy-text);
}
.card[data-tone="vision"] {
  --rail: var(--tone-vision-rail);
  --tone-soft: var(--tone-vision-soft);
  --tone-text: var(--tone-vision-text);
}
.card[data-tone="neutral"] {
  --rail: var(--tone-neutral-rail);
  --tone-soft: var(--tone-neutral-soft);
  --tone-text: var(--tone-neutral-text);
}
.card[data-tone="vehicle"] {
  --rail: var(--tone-vehicle-rail);
  --tone-soft: var(--tone-vehicle-soft);
  --tone-text: var(--tone-vehicle-text);
}
.card[data-tone="painting"] {
  --rail: var(--tone-painting-rail);
  --tone-soft: var(--tone-painting-soft);
  --tone-text: var(--tone-painting-text);
}

.card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.card__index {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--text-meta);
}

.card__pill {
  display: inline-flex;
  align-items: center;
  height: 22px;
  padding: 0 10px;
  border-radius: 999px;
  background: var(--tone-soft, var(--tone-neutral-soft));
  color: var(--tone-text, var(--tone-neutral-text));
  font-size: 12px;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
}

.card__title-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
}

.card__code {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  height: 26px;
  padding: 0 8px;
  border-radius: var(--radius-ctl);
  background: var(--tone-soft, var(--tone-neutral-soft));
  color: var(--tone-text, var(--tone-neutral-text));
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.card__name {
  margin: 0;
  font-size: 18px;
  line-height: 1.35;
  font-weight: 600;
  color: var(--text-1);
  overflow-wrap: anywhere;
}

.card__desc {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.65;
  font-weight: 500;
  color: var(--text-2);
  overflow-wrap: anywhere;
}

.card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.tag {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 10px;
  border-radius: 999px;
  background: var(--surface-subtle);
  border: 1px solid var(--border);
  color: var(--text-2);
  font-size: 12px;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
}

.card__foot {
  margin-top: auto;
  padding-top: 14px;
}

.card__foot-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-top: 1px solid var(--border);
  padding-top: 14px;
}

.card__open-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-1);
  transition: color 200ms ease;
  white-space: nowrap;
}

.card__host-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}

.card__host {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-meta);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color 200ms ease;
}

.card__arrow {
  flex: none;
  color: var(--text-meta);
  transition: color 200ms ease;
  display: inline-flex;
}

/* ---------- Skeleton ---------- */
.skeleton {
  pointer-events: none;
}

.skeleton .sk {
  border-radius: 6px;
  background: linear-gradient(90deg, #EEF0F4 25%, #F5F6F9 50%, #EEF0F4 75%);
  background-size: 200% 100%;
  animation: shimmer 1400ms ease-in-out infinite;
}

.sk-index { width: 84px; height: 12px; }
.sk-pill { width: 52px; height: 20px; border-radius: 999px; }
.sk-name { width: 70%; height: 20px; margin-top: 16px; }
.sk-desc { width: 90%; height: 12px; margin-top: 12px; }
.sk-desc2 { width: 60%; height: 12px; margin-top: 8px; }
.sk-tags { width: 60%; height: 22px; margin-top: 14px; border-radius: 999px; }
.sk-foot { width: 100%; height: 14px; margin-top: 24px; }

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ---------- Empty / Error states ---------- */
.state-panel {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 48px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
}

.state-panel__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--surface-subtle);
  color: var(--text-meta);
}

.state-panel--error .state-panel__icon {
  background: var(--danger-soft);
  color: var(--danger);
}

.state-panel__title {
  margin: 14px 0 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-1);
}

.state-panel__desc {
  margin: 8px 0 0;
  font-size: 13px;
  color: var(--text-2);
  max-width: 420px;
}

.state-panel__desc code {
  font-family: var(--font-mono);
  font-size: 12px;
  background: var(--surface-subtle);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 18px;
  margin-top: 18px;
  border-radius: var(--radius-ctl);
  border: 1px solid var(--border-hover);
  background: var(--surface);
  color: var(--text-1);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 200ms ease, border-color 200ms ease,
    color 200ms ease;
}

.btn:hover {
  background: var(--surface-hover);
  border-color: var(--text-meta);
}

.btn:active {
  background: var(--surface-subtle);
}

.btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  box-shadow: 0 0 0 5px rgba(37, 99, 235, 0.16);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- Footer ---------- */
.page__footer {
  margin-top: 28px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  color: var(--text-meta);
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ---------- Breakpoints ---------- */
@media (max-width: 1199px) {
  .page {
    max-width: calc(100vw - 48px);
  }
  .grid {
    gap: 16px;
  }
}

@media (max-width: 767px) {
  .page {
    padding: 24px 16px 24px;
  }
  .topbar {
    padding: 10px 16px;
  }
  .grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .card {
    padding: 18px;
    min-height: 0;
  }
  .card__name {
    font-size: 17px;
  }
  .card__host {
    overflow-wrap: anywhere;
    white-space: normal;
  }
  .card__foot-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}

@media (max-width: 359px) {
  .card__foot-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .card,
  .btn,
  .card__open-label,
  .card__host,
  .card__arrow {
    transition: none;
  }
  .skeleton .sk {
    animation: none;
  }
}