@font-face {
  font-family: 'Space Grotesk';
  src: url('assets/space-grotesk.ttf') format('truetype');
  font-weight: 300 700;
  font-display: swap;
}
@font-face {
  font-family: 'DM Sans';
  src: url('assets/dm-sans.ttf') format('truetype');
  font-weight: 300 700;
  font-display: swap;
}
@font-face {
  font-family: 'IBM Plex Mono';
  src: url('assets/ibm-plex-mono.ttf') format('truetype');
  font-weight: 300 700;
  font-display: swap;
}

:root {
  --bg: #F4F5F7;
  --surface: #FFFFFF;
  --ink: #141821;
  --muted: #5B6472;
  --rule: #D9DDE3;
  --accent: #0F6B5C;
  --accent-ink: #FFFFFF;
  --warn: #B24020;
  --radius: 8px;
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: var(--surface); padding: 8px 12px; z-index: 100;
}
a.skip-link:focus { left: 8px; top: 8px; }

.app-header {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; flex-wrap: wrap;
  padding: 20px 24px; border-bottom: 1px solid var(--rule);
  background: var(--surface);
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  font-family: var(--font-mono); font-weight: 600; font-size: 18px;
  width: 40px; height: 40px; display: grid; place-items: center;
  background: var(--accent); color: var(--accent-ink); border-radius: 6px;
  letter-spacing: 0.05em;
}
.brand-name {
  font-family: var(--font-display); font-size: 22px; font-weight: 600;
  margin: 0; letter-spacing: -0.02em; line-height: 1.1;
}
.brand-sub { margin: 2px 0 0; color: var(--muted); font-size: 13px; }
.header-note { margin: 0; color: var(--muted); font-size: 13px; font-family: var(--font-mono); }

.app-main { max-width: 1180px; margin: 0 auto; padding: 24px 24px 48px; }

.toolbar {
  display: grid; grid-template-columns: 1fr auto auto; gap: 12px; align-items: end;
  padding: 16px; background: var(--surface); border: 1px solid var(--rule);
  border-radius: var(--radius);
}
.search-wrap, .filter-wrap { display: flex; flex-direction: column; gap: 4px; }
.search-wrap label, .filter-wrap label {
  font-size: 12px; font-weight: 500; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--muted);
}
#search, #filter {
  font-family: var(--font-body); font-size: 16px; padding: 10px 12px;
  border: 1px solid var(--rule); border-radius: 6px; background: var(--surface);
  color: var(--ink); min-height: 44px;
}
#search:focus, #filter:focus { outline: 2px solid var(--accent); outline-offset: 2px; }

.toggle-btn {
  min-height: 44px; padding: 10px 16px; border: 1px solid var(--rule);
  background: var(--surface); color: var(--ink); border-radius: 6px;
  font-family: var(--font-body); font-size: 14px; font-weight: 500; cursor: pointer;
}
.toggle-btn[aria-pressed="true"] { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.toggle-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.toggle-btn:active { transform: scale(0.97); }

.primary-btn {
  min-height: 44px; padding: 10px 18px; border: none;
  background: var(--accent); color: var(--accent-ink); border-radius: 6px;
  font-family: var(--font-body); font-size: 14px; font-weight: 600; cursor: pointer;
}
.primary-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.primary-btn:active { transform: scale(0.97); }

.results-meta { padding: 12px 4px; color: var(--muted); font-size: 13px; font-family: var(--font-mono); }

.item-list { display: grid; grid-template-columns: 1fr; gap: 12px; }

.item {
  background: var(--surface); border: 1px solid var(--rule); border-radius: var(--radius);
  padding: 16px; display: grid; grid-template-columns: 1fr auto; gap: 12px; align-items: start;
  transition: border-color 150ms cubic-bezier(0.22,1,0.36,1);
}
.item:hover { border-color: var(--accent); }
.item:focus-within { border-color: var(--accent); }
.item-head { display: flex; flex-direction: column; gap: 4px; }
.item-title { font-family: var(--font-display); font-size: 18px; font-weight: 600; margin: 0; letter-spacing: -0.01em; }
.item-meta { display: flex; flex-wrap: wrap; gap: 6px 12px; color: var(--muted); font-size: 13px; font-family: var(--font-mono); }
.item-summary { margin: 8px 0 0; color: var(--ink); font-size: 14px; }
.item-cat {
  display: inline-block; padding: 2px 8px; border: 1px solid var(--rule);
  border-radius: 999px; font-size: 12px; font-family: var(--font-mono);
}
.open-item {
  min-height: 44px; min-width: 44px; padding: 8px 14px; border: 1px solid var(--rule);
  background: var(--surface); color: var(--ink); border-radius: 6px; cursor: pointer;
  font-family: var(--font-body); font-size: 13px; font-weight: 500;
}
.open-item:hover { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.open-item:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.open-item:active { transform: scale(0.97); }

.empty-state {
  text-align: center; padding: 48px 24px; background: var(--surface);
  border: 1px dashed var(--rule); border-radius: var(--radius); margin-top: 16px;
}
.empty-state h2 { font-family: var(--font-display); margin: 0 0 8px; }
.empty-state p { color: var(--muted); margin: 0 0 16px; }

.app-footer { padding: 24px; color: var(--muted); font-size: 12px; text-align: center; border-top: 1px solid var(--rule); background: var(--surface); }

.detail-overlay {
  position: fixed; inset: 0; background: rgba(20,24,33,0.45);
  display: grid; place-items: center; padding: 24px; z-index: 50;
}
.detail-overlay[hidden] { display: none; }
.detail-panel {
  background: var(--surface); border-radius: 10px; width: 100%; max-width: 680px;
  max-height: 90vh; overflow: auto; padding: 24px; position: relative;
  border: 1px solid var(--rule);
}
.close-btn {
  position: absolute; top: 12px; right: 12px; min-height: 44px; min-width: 44px;
  border: 1px solid var(--rule); background: var(--surface); border-radius: 6px; cursor: pointer;
}
.close-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.close-btn:active { transform: scale(0.97); }
.detail-kicker { font-family: var(--font-mono); font-size: 12px; color: var(--muted); letter-spacing: 0.08em; text-transform: uppercase; margin: 0 0 4px; }
.detail-title { font-family: var(--font-display); font-size: 26px; font-weight: 600; margin: 0 0 16px; letter-spacing: -0.02em; line-height: 1.2; }
.detail-facts { display: grid; grid-template-columns: repeat(2,1fr); gap: 8px 16px; margin: 0 0 16px; }
.detail-facts dt { font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); font-family: var(--font-mono); }
.detail-facts dd { margin: 0; font-size: 14px; font-weight: 500; }
.detail-body { white-space: pre-line; font-size: 15px; line-height: 1.65; color: var(--ink); margin-bottom: 20px; }
.detail-actions { display: flex; gap: 8px; }

@media (max-width: 640px) {
  .toolbar { grid-template-columns: 1fr; }
  .detail-facts { grid-template-columns: 1fr; }
  .item { grid-template-columns: 1fr; }
  .open-item { width: 100%; }
}

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

@media (hover: hover) and (pointer: fine) {
  .item:hover { border-color: var(--accent); }
}