/* OLS Digital Showcase — shared hub styling */

:root {
  --ols-blue: #1A3A6B;
  --ols-blue-deep: #102245;
  --ols-gold: #E4B824;
  --ols-text: #222;
  --ols-bg: #F4F6FA;
  --ols-border: #595959;
  --ols-border-soft: #D1D5DE;
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: var(--font-stack);
  color: var(--ols-text);
  background: var(--ols-bg);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

/* ---- Hub header ---- */
.hero {
  background: linear-gradient(135deg, var(--ols-blue) 0%, var(--ols-blue-deep) 100%);
  color: white;
  padding: 2.4rem 1.5rem 2.6rem;
  border-bottom: 4px solid var(--ols-gold);
}
.hero-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  gap: 1.8rem;
  align-items: center;
  flex-wrap: wrap;
}
.hero-crest {
  width: 110px;
  height: 110px;
  object-fit: contain;
  flex-shrink: 0;
  filter: drop-shadow(0 4px 12px rgba(0,0,0,0.35));
}
.hero-text h1 {
  margin: 0 0 0.35rem;
  font-size: clamp(1.7rem, 3.6vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.01em;
}
.hero-text p {
  margin: 0;
  font-size: 1.05rem;
  opacity: 0.92;
  max-width: 60ch;
  line-height: 1.45;
}
.hero-meta {
  margin-top: 0.7rem;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.hero-meta .pill {
  background: rgba(255,255,255,0.13);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 999px;
  padding: 0.22rem 0.7rem;
  font-size: 0.82rem;
  letter-spacing: 0.02em;
}

/* ---- Controls ---- */
main { max-width: 1280px; margin: 0 auto; padding: 1.6rem 1.5rem 3rem; }

.controls {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
  background: white;
  border: 1px solid var(--ols-border-soft);
  border-radius: 14px;
  padding: 1rem 1.1rem;
  margin: -3rem 0 1.6rem; /* lift into hero edge */
  box-shadow: 0 6px 24px rgba(16,34,69,0.08);
  position: relative;
  z-index: 1;
}
.controls-row { display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; }
.controls label { font-size: 0.82rem; font-weight: 600; color: #555; margin-right: 0.3rem; }
.controls input[type="search"] {
  flex: 1;
  min-width: 220px;
  border: 1px solid var(--ols-border-soft);
  border-radius: 8px;
  padding: 0.6rem 0.8rem;
  font: inherit;
  font-size: 0.95rem;
  color: var(--ols-text);
}
.controls input[type="search"]:focus {
  outline: none;
  border-color: var(--ols-blue);
  box-shadow: 0 0 0 3px rgba(26,58,107,0.15);
}
.btn-filter {
  background: white;
  border: 1px solid var(--ols-border-soft);
  border-radius: 999px;
  padding: 0.4rem 0.85rem;
  font: inherit;
  font-size: 0.85rem;
  cursor: pointer;
  color: #444;
  transition: all 0.15s;
}
.btn-filter:hover { border-color: var(--ols-blue); color: var(--ols-blue); }
.btn-filter.active {
  background: var(--ols-blue);
  color: white;
  border-color: var(--ols-blue);
}

.result-line {
  font-size: 0.85rem;
  color: #555;
  margin: 0.2rem 0 1rem;
}

/* ---- Cards ---- */
.grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}
.card {
  display: flex;
  flex-direction: column;
  background: white;
  border: 1px solid var(--ols-border);
  border-radius: 12px;
  padding: 1.05rem 1.1rem 1rem;
  text-decoration: none;
  color: var(--ols-text);
  position: relative;
  transition: transform 0.12s ease, box-shadow 0.12s ease, border-color 0.12s ease;
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 5px;
  background: var(--ols-gold);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.18s ease;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(16,34,69,0.12);
  border-color: var(--ols-blue);
}
.card:hover::before { transform: scaleY(1); }
.card:focus-visible {
  outline: 3px solid var(--ols-gold);
  outline-offset: 2px;
}

.card-head {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin-bottom: 0.65rem;
}
.chip {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.25rem 0.55rem;
  border-radius: 4px;
  border: 1px solid transparent;
}
.level-ks3    { background: #E8F1FB; color: #1A3A6B; border-color: #C3D7EE; }
.level-gcse   { background: #FFF4D6; color: #6B4900; border-color: #E8C56A; }
.level-alevel { background: #1A3A6B; color: #FFF6D0; }
.chip-board   { background: #F0F0F0; color: #444; border-color: #DADADA; letter-spacing: 0.03em; }

.card-title {
  margin: 0 0 0.3rem;
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--ols-blue-deep);
  line-height: 1.25;
}
.card-topic {
  margin: 0 0 0.6rem;
  font-size: 0.93rem;
  color: #333;
  line-height: 1.4;
  flex: 1;
}
.card-activity {
  margin: 0;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 700;
  color: #6B4900;
}
.card-arrow {
  position: absolute;
  right: 1rem;
  bottom: 0.9rem;
  font-size: 1.1rem;
  color: var(--ols-blue);
  opacity: 0.6;
  transition: transform 0.18s ease, opacity 0.18s ease;
}
.card:hover .card-arrow { transform: translateX(4px); opacity: 1; }

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: #666;
  background: white;
  border: 1px dashed var(--ols-border-soft);
  border-radius: 12px;
}

/* QR panel */
.qr-panel {
  margin-top: 2rem;
  background: white;
  border: 1px solid var(--ols-border);
  border-radius: 14px;
  padding: 1.4rem 1.6rem;
  display: flex;
  gap: 1.4rem;
  align-items: center;
  flex-wrap: wrap;
}
.qr-left { flex: 1; min-width: 240px; }
.qr-left h2 {
  margin: 0 0 0.3rem;
  font-size: 1.2rem;
  color: var(--ols-blue-deep);
}
.qr-left p { margin: 0 0 0.5rem; color: #444; line-height: 1.5; }
.qr-url {
  font-family: "SF Mono", Menlo, Consolas, monospace !important;
  background: var(--ols-bg);
  border: 1px solid var(--ols-border-soft);
  border-radius: 6px;
  padding: 0.45rem 0.7rem;
  font-size: 0.88rem;
  color: var(--ols-blue);
  display: inline-block;
  word-break: break-all;
}
.qr-img {
  width: 180px; height: 180px;
  border: 4px solid var(--ols-gold);
  border-radius: 8px;
  background: white;
  flex-shrink: 0;
}

/* ---- Footer ---- */
footer {
  text-align: center;
  padding: 2rem 1rem 2.5rem;
  font-size: 0.85rem;
  color: #666;
  border-top: 1px solid var(--ols-border-soft);
  margin-top: 2rem;
  background: white;
}
footer a { color: var(--ols-blue); }

/* ---- Shared demo top strip (used inside each /<dept>/index.html) ---- */
.demo-strip {
  background: var(--ols-blue);
  color: white;
  padding: 0.55rem 1.1rem;
  display: flex;
  gap: 0.9rem;
  align-items: center;
  border-bottom: 3px solid var(--ols-gold);
  font-size: 0.92rem;
}
.demo-strip a.back {
  color: white;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
  opacity: 0.92;
}
.demo-strip a.back:hover { opacity: 1; }
.demo-strip .crest-small {
  width: 28px;
  height: 28px;
  object-fit: contain;
}
.demo-strip .title { font-weight: 700; }
.demo-strip .meta {
  margin-left: auto;
  font-size: 0.78rem;
  opacity: 0.85;
  letter-spacing: 0.03em;
}
@media (max-width: 540px) {
  .demo-strip .meta { display: none; }
  .hero-inner { gap: 1rem; }
  .hero-crest { width: 80px; height: 80px; }
}