:root {
  color-scheme: dark;
  --surface-canvas: #070b12;
  --surface-primary: #0e1521;
  --surface-secondary: #121c2b;
  --surface-selected: #17253a;
  --surface-scrim: rgba(3, 7, 18, 0.78);
  --text-primary: #f4f0e7;
  --text-secondary: #c5c0b7;
  --text-muted: #9f9a91;
  --border-default: #2f4058;
  --border-strong: #526984;
  --accent-primary: #e0b454;
  --accent-hover: #f0ca72;
  --accent-soft: #2b2618;
  --status-success: #9bd6aa;
  --status-success-soft: #14271b;
  --status-warning: #e0b454;
  --status-warning-soft: #2b2618;
  --focus-ring: #8bc7ff;
  --grid-line: rgba(82, 105, 132, 0.12);
  --shadow-overlay: 0 24px 70px rgba(0, 0, 0, 0.48);
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --motion-micro: 150ms ease-out;
  --motion-standard: 240ms cubic-bezier(0.16, 1, 0.3, 1);
  --radius-control: 0.375rem;
  --radius-card: 0.75rem;
  --max-content: 90rem;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html { overflow-x: clip; scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 20rem;
  overflow-x: clip;
  background-color: var(--surface-canvas);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 2rem 2rem;
  color: var(--text-primary);
  font: 400 1rem/1.6 Aptos, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

button, input, select { font: inherit; }

button, select, input[type="checkbox"] { touch-action: manipulation; }

a { color: var(--accent-primary); text-underline-offset: 0.2em; }
a:hover { color: var(--accent-hover); }

:focus-visible {
  outline: 0.1875rem solid var(--focus-ring);
  outline-offset: 0.125rem;
}

.skip-link {
  position: fixed;
  inset: var(--space-2) auto auto var(--space-2);
  z-index: 100;
  padding: var(--space-2) var(--space-4);
  background: var(--surface-primary);
  transform: translateY(-150%);
}

.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  inset-block-start: 0;
  z-index: 20;
  border-block-end: 1px solid var(--border-default);
  background: color-mix(in srgb, var(--surface-primary) 94%, transparent);
  backdrop-filter: blur(0.75rem);
}

.header-inner {
  display: grid;
  grid-template-columns: minmax(15rem, 1fr) minmax(18rem, 2fr) auto;
  gap: var(--space-6);
  align-items: center;
  width: min(100% - 2rem, var(--max-content));
  min-height: 5rem;
  margin-inline: auto;
}

.brand { display: flex; gap: var(--space-3); align-items: center; min-width: 0; }
.brand-mark { color: var(--accent-primary); font: 700 2rem/1 "Cambria Math", Cambria, serif; }
.brand p { margin: 0; color: var(--text-muted); font-size: 0.75rem; font-weight: 600; }
.brand h1 { margin: 0; font-size: 1.375rem; line-height: 1.3; letter-spacing: -0.02em; }

.header-stats { display: flex; gap: var(--space-5); color: var(--text-secondary); font-size: 0.875rem; }
.header-stats strong { color: var(--text-primary); font-variant-numeric: tabular-nums; }

.app-shell {
  display: grid;
  grid-template-columns: 16.5rem minmax(24rem, 1fr) minmax(21rem, 25rem);
  width: min(100%, var(--max-content));
  min-height: calc(100dvh - 5rem);
  margin-inline: auto;
  border-inline: 1px solid var(--border-default);
  background: color-mix(in srgb, var(--surface-canvas) 78%, transparent);
}

.filter-panel, .detail-panel { background: color-mix(in srgb, var(--surface-primary) 97%, transparent); }
.filter-panel { border-inline-end: 1px solid var(--border-default); padding: var(--space-6); }
.catalogue-panel { min-width: 0; padding: var(--space-8); }
.detail-panel { border-inline-start: 1px solid var(--border-default); padding: var(--space-6); }

.panel-heading { margin: 0 0 var(--space-4); font-size: 1.125rem; line-height: 1.35; letter-spacing: 0.02em; }
.panel-copy { color: var(--text-secondary); }

.catalogue-heading {
  display: flex;
  gap: var(--space-4);
  align-items: baseline;
  justify-content: space-between;
  margin-block-end: var(--space-5);
}

.catalogue-heading h2 { margin: 0; font-size: 2rem; line-height: 1.15; letter-spacing: -0.03em; }
.catalogue-heading p { margin: 0; color: var(--text-secondary); font-size: 0.875rem; }
.catalogue-heading h2 { font-family: "Cambria Math", Cambria, Georgia, serif; }
.catalogue-kicker { margin-block-end: var(--space-1) !important; color: var(--accent-primary) !important; font-family: "Cascadia Mono", Consolas, monospace; font-size: 0.6875rem !important; letter-spacing: 0.06em; }
.empty-symbol { margin: 0; color: var(--accent-primary); font: 700 3rem/1 "Cambria Math", Cambria, serif; }

.mobile-panel-bar, .detail-scrim { display: none; }
.site-footer { border-block-start: 1px solid var(--border-default); padding: var(--space-6); color: var(--text-secondary); text-align: center; font-size: 0.875rem; }

* { scrollbar-color: var(--border-strong) var(--surface-primary); }

@media (max-width: 74.99rem) {
  html.modal-open, html.modal-open body { overflow: hidden; }
  .app-shell { grid-template-columns: 15rem minmax(0, 1fr); }
  .detail-scrim { position: fixed; inset: 0; z-index: 29; background: var(--surface-scrim); }
  .detail-panel { position: fixed; inset: 5rem 0 0 auto; z-index: 30; width: min(30rem, 92vw); overflow-y: auto; visibility: hidden; pointer-events: none; box-shadow: var(--shadow-overlay); transform: translateX(105%); transition: transform var(--motion-standard), visibility 0s linear 240ms; }
  body[data-detail-open="true"] .detail-panel { visibility: visible; pointer-events: auto; transform: translateX(0); transition-delay: 0s; }
  body[data-detail-open="true"] .detail-scrim { display: block; }
  .mobile-panel-bar { display: flex; justify-content: flex-end; }
}

@media (max-width: 56.24rem) {
  .header-inner { grid-template-columns: 1fr auto; gap: var(--space-3); padding-block: var(--space-3); }
  .search-wrap { grid-column: 1 / -1; grid-row: 2; }
  .header-stats { align-self: start; flex-direction: column; gap: 0; text-align: end; }
  .site-header { position: static; }
  .app-shell { display: block; min-height: auto; }
  .filter-panel { border: 0; border-block-end: 1px solid var(--border-default); padding: var(--space-4); }
  .filter-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-3); }
  .catalogue-panel { padding: var(--space-5) var(--space-4); }
  .detail-panel { inset-block-start: 0; }
}

@media (max-width: 39.99rem) {
  .header-inner { width: min(100% - 1.5rem, var(--max-content)); }
  .header-stats { font-size: 0.75rem; }
  .filter-grid { grid-template-columns: 1fr; }
  .catalogue-heading { display: block; }
  .catalogue-heading p { margin-block-start: var(--space-2); }
  .detail-panel { inset-inline: 0; width: 100%; padding: var(--space-4); }
  .mobile-panel-bar { position: sticky; top: 0; z-index: 1; padding-block-end: var(--space-3); background: var(--surface-primary); }
  .mobile-panel-bar .button { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}