/* =========================================================
   Cardinal & Gold — brutalist/editorial redesign
   Fonts: Anton (display) + IBM Plex Mono (UI/body)
   ========================================================= */

@import url("https://fonts.googleapis.com/css2?family=Anton&family=IBM+Plex+Mono:wght@400;500;600;700&display=swap");

:root {
  --cardinal: #990000;
  --cardinal-deep: #5e0000;
  --gold: #ffcc00;
  --gold-soft: #ffe066;
  --paper: #fbf7ec;
  --paper-alt: #f2ead6;
  --ink: #111111;
  --rule: #111111;
  --muted: #555555;
  --shadow: 6px 6px 0 var(--ink);
  --shadow-gold: 6px 6px 0 var(--gold);
  --shadow-cardinal: 6px 6px 0 var(--cardinal);
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  min-height: 100dvh;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  color: var(--ink);
  background: var(--paper);
  /* faint diagonal ticker pattern */
  background-image: repeating-linear-gradient(
    135deg,
    transparent 0 22px,
    rgba(17, 17, 17, 0.025) 22px 23px
  );
}

button,
input {
  font: inherit;
  color: inherit;
}

/* ---------- layout shell ---------- */

.page-shell {
  width: min(1240px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2.5rem 0 5rem;
}

/* ---------- masthead ---------- */

.hero {
  position: relative;
  margin-bottom: 2rem;
  padding: 2rem 1.75rem 1.5rem;
  background: var(--cardinal);
  color: var(--paper);
  border: 3px solid var(--ink);
  box-shadow: var(--shadow-gold);
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 10px;
  background: repeating-linear-gradient(
    90deg,
    var(--gold) 0 24px,
    var(--ink) 24px 30px
  );
}

.hero h1 {
  margin: 0 0 0.5rem;
  font-family: "Anton", "Oswald", "Impact", sans-serif;
  font-weight: 400;
  font-size: clamp(3.5rem, 14vw, 10rem);
  line-height: 0.88;
  letter-spacing: 0.005em;
  text-transform: uppercase;
  color: var(--gold);
  text-shadow: 4px 4px 0 var(--cardinal-deep), 8px 8px 0 var(--ink);
}

/* ---------- controls ---------- */

.controls {
  display: grid;
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.search-field {
  display: block;
  position: relative;
}

.search-field::before {
  content: "▸ SEARCH";
  position: absolute;
  top: -0.6rem;
  left: 1rem;
  padding: 0 0.5rem;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  background: var(--paper);
  color: var(--cardinal);
  z-index: 1;
}

.search-field input {
  width: 100%;
  height: 3.5rem;
  padding: 0 1rem;
  background: var(--paper);
  color: var(--ink);
  border: 3px solid var(--ink);
  border-radius: 0;
  font-weight: 500;
  letter-spacing: 0.02em;
  box-shadow: var(--shadow);
  transition: box-shadow 120ms ease, transform 120ms ease,
    background-color 120ms ease;
}

.search-field input::placeholder {
  color: var(--muted);
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.15em;
}

.search-field input:focus {
  outline: none;
  background: var(--gold-soft);
  box-shadow: var(--shadow-cardinal);
  transform: translate(-2px, -2px);
}

/* ---------- filter chips ---------- */

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.75rem;
  background: var(--paper-alt);
  border: 3px solid var(--ink);
  box-shadow: var(--shadow);
}

.filter-chip {
  position: relative;
  padding: 0.55rem 0.95rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
  background: var(--paper);
  border: 2px solid var(--ink);
  border-radius: 0;
  cursor: pointer;
  transition: background-color 120ms ease, color 120ms ease,
    transform 120ms ease, box-shadow 120ms ease;
}

.filter-chip:hover {
  background: var(--gold);
  transform: translate(-2px, -2px);
  box-shadow: 3px 3px 0 var(--ink);
}

.filter-chip:focus-visible {
  outline: 3px solid var(--cardinal);
  outline-offset: 2px;
}

.filter-chip[aria-selected="true"] {
  background: var(--cardinal);
  color: var(--gold);
  border-color: var(--ink);
  box-shadow: inset 0 0 0 2px var(--gold);
}

.filter-chip[aria-selected="true"]::after {
  content: "●";
  margin-left: 0.4rem;
  color: var(--gold);
  font-size: 0.7rem;
}

/* ---------- results grid ---------- */

.results {
  margin-top: 0.5rem;
}

.lab-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0;
  border-top: 3px solid var(--ink);
  border-left: 3px solid var(--ink);
  background: var(--ink);
}

/* ---------- lab cards
   Each card carries USC colors at rest:
   - cardinal top band with gold "LAB" label
   - gold bottom rail
   - cream body with black display title
   ------------------------------------------------- */

.lab-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 11rem;
  padding: 2.4rem 1.15rem 1.35rem;
  background: var(--paper);
  color: var(--ink);
  text-decoration: none;
  border-right: 3px solid var(--ink);
  border-bottom: 3px solid var(--ink);
  transition: background-color 160ms ease, color 160ms ease;
  overflow: hidden;
}

/* cardinal top band with gold "LAB" label */
.lab-card::before {
  content: "LAB";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  padding: 0.45rem 1.15rem;
  background: var(--cardinal);
  color: var(--gold);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  border-bottom: 2px solid var(--ink);
}

/* gold bottom rail */
.lab-card::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 6px;
  background: var(--gold);
  transition: background-color 160ms ease;
}

.lab-card h2 {
  margin: 0;
  font-family: "Anton", "Oswald", "Impact", sans-serif;
  font-weight: 400;
  font-size: 1.35rem;
  line-height: 1.02;
  letter-spacing: 0.01em;
  text-transform: uppercase;
}

/* hover: whole card flips to cardinal, label swaps, rail stays gold */
.lab-card:hover {
  background: var(--cardinal);
  color: var(--gold);
  z-index: 2;
}

.lab-card:hover::before {
  content: "→ OPEN";
  background: var(--gold);
  color: var(--cardinal);
}

.lab-card:hover h2 {
  color: var(--gold);
}

.lab-card:focus-visible {
  outline: 4px solid var(--gold);
  outline-offset: -4px;
}

/* ---------- empty state ---------- */

.empty-state {
  margin-top: 1.5rem;
  padding: 2.75rem 1.5rem;
  text-align: center;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--cardinal);
  background: var(--paper);
  border: 3px dashed var(--ink);
}

.lab-card[hidden],
.empty-state[hidden] {
  display: none !important;
}

/* ---------- utilities ---------- */

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

/* ---------- responsive ---------- */

@media (max-width: 720px) {
  .page-shell {
    width: min(100% - 1rem, 1240px);
    padding: 1.5rem 0 3rem;
  }

  .hero {
    padding: 1.25rem 1.1rem 1.1rem;
    box-shadow: 4px 4px 0 var(--gold);
  }

  .hero h1 {
    text-shadow: 3px 3px 0 var(--cardinal-deep), 5px 5px 0 var(--ink);
  }

  .lab-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  }

  .lab-card {
    min-height: 9.5rem;
    padding: 2.1rem 0.9rem 1.1rem;
  }

  .lab-card h2 {
    font-size: 1.1rem;
  }

  .filter-bar {
    padding: 0.6rem;
  }

  .filter-chip {
    padding: 0.5rem 0.7rem;
    font-size: 0.72rem;
  }
}