*, *::before, *::after { box-sizing: border-box; }

:root {
  --bg: #050607;
  --ink: #f3efe3;
  --muted: #9f9687;
  --line: rgba(116, 255, 185, 0.22);
  --green: #72ffb6;
  --cyan: #3cc8ff;
  --amber: #d69b53;
  --violet: #a891ff;
  --pink: #ff7eb6;
}

html { background: var(--bg); }

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at 12% 8%, rgba(114, 255, 182, 0.16), transparent 24rem),
    radial-gradient(circle at 86% 18%, rgba(60, 200, 255, 0.12), transparent 22rem),
    radial-gradient(circle at 50% 105%, rgba(214, 155, 83, 0.13), transparent 28rem),
    linear-gradient(180deg, #050607 0%, #090908 55%, #060505 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.95), rgba(0, 0, 0, 0.25));
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    rgba(255, 255, 255, 0.03) 0,
    rgba(255, 255, 255, 0.03) 1px,
    transparent 1px,
    transparent 4px
  );
  opacity: 0.12;
  mix-blend-mode: screen;
}

a { color: inherit; }

.lab-shell {
  width: min(1180px, 100%);
  margin: 0 auto;
  padding: 1.1rem 1.2rem 5rem;
  position: relative;
  z-index: 1;
}

.lab-header {
  min-height: 76px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
}

.back-link {
  width: max-content;
  color: var(--muted);
  font-size: 0.76rem;
  letter-spacing: 0.18em;
  text-decoration: none;
  text-transform: uppercase;
  border-bottom: 1px solid transparent;
}

.back-link:hover {
  color: var(--green);
  border-bottom-color: var(--green);
}

.lab-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  text-align: left;
}

.lab-logo {
  width: 62px;
  height: 62px;
  object-fit: contain;
  filter: drop-shadow(0 0 14px rgba(114, 255, 182, 0.36));
}

.lab-mark h1 {
  margin: 0;
  font-size: clamp(1.35rem, 3vw, 2.25rem);
  line-height: 1.08;
  letter-spacing: 0.08em;
}

.lab-mark p {
  margin: 0.25rem 0 0;
  color: var(--green);
  font-size: clamp(0.86rem, 1.7vw, 1.05rem);
  letter-spacing: 0.04em;
}

.status-stamp {
  justify-self: end;
  transform: rotate(-7deg);
  color: var(--green);
  border: 2px solid var(--green);
  border-radius: 6px;
  padding: 0.45rem 0.7rem;
  font-weight: 800;
  font-size: 0.9rem;
  line-height: 1.2;
  letter-spacing: 0.08em;
  text-align: center;
  text-transform: uppercase;
  box-shadow: 0 0 18px rgba(114, 255, 182, 0.16);
}

.intro {
  padding: clamp(3rem, 7vw, 6rem) 0 clamp(1.8rem, 4vw, 3.2rem);
  text-align: center;
}

.kicker {
  margin: 0 0 0.8rem;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.intro h2 {
  max-width: 760px;
  margin: 0 auto;
  font-size: clamp(2.3rem, 8vw, 5.6rem);
  line-height: 0.98;
  letter-spacing: 0;
}

.poster-wall {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1rem, 2.6vw, 1.75rem);
  align-items: start;
}

.poster-card {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 6px;
  background: #090a0a;
  box-shadow:
    0 22px 60px rgba(0, 0, 0, 0.42),
    0 0 0 1px rgba(255, 255, 255, 0.04) inset;
  transform: rotate(var(--tilt, 0deg));
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.poster-card:nth-child(2) { --tilt: 0.8deg; margin-top: 3rem; }
.poster-card:nth-child(3) { --tilt: -0.7deg; }
.poster-card:nth-child(4) { --tilt: 0.45deg; margin-top: 2rem; }

.poster-card:hover {
  transform: rotate(0deg) translateY(-4px);
  border-color: var(--accent);
  box-shadow:
    0 28px 80px rgba(0, 0, 0, 0.52),
    0 0 28px color-mix(in srgb, var(--accent) 22%, transparent);
}

.poster-card img {
  width: 100%;
  display: block;
}

.poster-card::before,
.poster-card::after {
  content: "";
  position: absolute;
  top: 0.75rem;
  width: 4.2rem;
  height: 1.05rem;
  background: rgba(231, 222, 196, 0.74);
  border: 1px solid rgba(0, 0, 0, 0.15);
  opacity: 0.75;
  transform: rotate(-5deg);
}

.poster-card::before { left: 1rem; }
.poster-card::after { right: 1rem; transform: rotate(5deg); }

.poster-card-green { --accent: var(--green); }
.poster-card-amber { --accent: var(--amber); }
.poster-card-violet { --accent: var(--violet); }
.poster-card-pink { --accent: var(--pink); }

.poster-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: end;
  padding: 2.7rem 1rem 0.9rem;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.82), transparent);
  color: #fff;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.poster-card:hover .poster-caption,
.poster-card:focus-within .poster-caption {
  opacity: 1;
  transform: translateY(0);
}

.poster-caption span {
  font-weight: 800;
  font-size: 0.98rem;
}

.poster-caption small {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.78rem;
  white-space: nowrap;
}

@media (max-width: 760px) {
  .lab-shell { padding: 0.85rem 0.85rem 3rem; }

  .lab-header {
    grid-template-columns: 1fr auto;
    align-items: start;
  }

  .lab-mark {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-content: flex-start;
    margin-top: 1rem;
  }

  .status-stamp {
    font-size: 0.76rem;
    padding: 0.38rem 0.55rem;
  }

  .intro {
    text-align: left;
    padding-top: 2.5rem;
  }

  .intro h2 { margin: 0; }

  .poster-wall { grid-template-columns: 1fr; }

  .poster-card:nth-child(n) {
    margin-top: 0;
    transform: none;
  }

  .poster-caption {
    position: static;
    opacity: 1;
    transform: none;
    padding: 0.8rem 0.85rem;
    background: rgba(8, 8, 8, 0.94);
  }
}