:root {
  --ql-bg: #0a0618;
  --ql-panel: rgba(18, 12, 32, 0.88);
  --ql-border: rgba(155, 126, 217, 0.28);
  --ql-text: #e8e4f0;
  --ql-muted: #9a8fb8;
  --ql-accent: #9b7ed9;
  --ql-cyan: #4ec8e8;
}

* { box-sizing: border-box; }

body.quantum-lab-page {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, sans-serif;
  color: var(--ql-text);
  background: radial-gradient(ellipse 120% 80% at 50% -10%, rgba(100, 80, 160, 0.35), transparent 55%),
    var(--ql-bg);
}

.ql-stars {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(1px 1px at 10% 20%, rgba(255,255,255,0.5), transparent),
    radial-gradient(1px 1px at 80% 40%, rgba(255,255,255,0.35), transparent),
    radial-gradient(1px 1px at 45% 70%, rgba(255,255,255,0.4), transparent),
    radial-gradient(1px 1px at 70% 85%, rgba(255,255,255,0.3), transparent);
  opacity: 0.6;
}

.ql-header {
  position: relative;
  z-index: 1;
  max-width: 52rem;
  margin: 0 auto;
  padding: 2rem 1.25rem 1rem;
  text-align: center;
}

.ql-badge {
  display: inline-block;
  margin: 0 0 0.75rem;
  padding: 0.2rem 0.65rem;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ql-cyan);
  border: 1px solid rgba(78, 200, 232, 0.35);
  border-radius: 999px;
}

.ql-header h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  background: linear-gradient(135deg, #e8d4ff, #7eb8ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.ql-lead {
  margin: 0 auto 1rem;
  max-width: 36rem;
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--ql-muted);
}

.ql-back {
  font-size: 0.82rem;
  color: var(--ql-accent);
  text-decoration: none;
}

.ql-back:hover { text-decoration: underline; }

.ql-hero {
  max-width: 56rem;
  margin: 0 auto 1.25rem;
  padding: 0 1.25rem;
}

.ql-hero img {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--ql-border);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
}

.ql-main {
  position: relative;
  z-index: 1;
  max-width: 56rem;
  margin: 0 auto;
  padding: 0 1.25rem 3rem;
}

.ql-loading {
  text-align: center;
  color: var(--ql-muted);
  font-size: 0.9rem;
}

.ql-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
}

.ql-card {
  margin: 0;
  background: var(--ql-panel);
  border: 1px solid var(--ql-border);
  border-radius: 10px;
  overflow: hidden;
  cursor: pointer;
  transition: border-color 0.2s, transform 0.2s;
}

.ql-card:hover {
  border-color: rgba(126, 184, 255, 0.45);
  transform: translateY(-2px);
}

.ql-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
  background: #120c20;
}

.ql-card figcaption {
  padding: 0.65rem 0.75rem 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.ql-card strong {
  font-size: 0.82rem;
  color: var(--ql-text);
}

.ql-card span {
  font-size: 0.72rem;
  color: var(--ql-muted);
}

.ql-footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 1.5rem;
  font-size: 0.78rem;
  color: var(--ql-muted);
}

.ql-footer a { color: var(--ql-accent); }

.ql-lightbox {
  border: none;
  padding: 0;
  max-width: min(92vw, 900px);
  width: 100%;
  background: transparent;
}

.ql-lightbox::backdrop {
  background: rgba(4, 6, 12, 0.88);
  backdrop-filter: blur(6px);
}

.ql-lightbox figure { margin: 0; }

.ql-lightbox img {
  width: 100%;
  max-height: 78vh;
  object-fit: contain;
  border-radius: 8px;
  border: 1px solid var(--ql-border);
}

.ql-lightbox figcaption {
  margin-top: 0.65rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--ql-muted);
}

.ql-lightbox-close {
  position: absolute;
  top: -2.2rem;
  right: 0;
  border: none;
  background: transparent;
  color: var(--ql-text);
  font-size: 1.2rem;
  cursor: pointer;
}

/* ── Theories easter egg ── */
.qt-theories {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.qt-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  background: var(--ql-panel);
  border: 1px solid var(--ql-border);
  border-radius: 10px;
  overflow: hidden;
}

.qt-card--has-img {
  grid-template-columns: minmax(140px, 220px) minmax(0, 1fr);
}

.qt-card-img-btn {
  padding: 0;
  border: none;
  background: #120c20;
  cursor: pointer;
  display: block;
}

.qt-card-img-btn img {
  width: 100%;
  height: 100%;
  min-height: 140px;
  object-fit: cover;
  display: block;
}

.qt-card-body {
  padding: 1rem 1.1rem 1.15rem;
}

.qt-card-body h2 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
  color: var(--ql-text);
}

.qt-card-date {
  margin: 0 0 0.5rem;
  font-size: 0.72rem;
  color: var(--ql-cyan);
  letter-spacing: 0.06em;
}

.qt-card-text {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--ql-muted);
}

@media (max-width: 560px) {
  .qt-card--has-img {
    grid-template-columns: 1fr;
  }

  .qt-card-img-btn img {
    min-height: 160px;
    max-height: 200px;
  }
}