/* /materials — scoped under body.materials; prefixes mat-* to avoid global collisions */
body.materials {
  --mat-ink: #1c1917;
  --mat-copper: #b45309;
}
body.materials .mat-hero {
  background:
    radial-gradient(ellipse 80% 50% at 6% 0%, rgba(180, 83, 9, .16), transparent 55%),
    radial-gradient(ellipse 60% 45% at 94% 12%, rgba(100, 116, 139, .14), transparent 50%),
    linear-gradient(180deg, #faf5f0 0%, var(--bg) 72%);
  padding-bottom: 40px;
}
body.materials .mat-stage {
  perspective: 1100px;
  min-height: 240px;
  display: grid;
  place-items: center;
  position: relative;
}
.mat-stage-plane {
  position: relative;
  transform-style: preserve-3d;
  border-radius: 18px;
  overflow: hidden;
  background: linear-gradient(145deg, #fff, #e7e5e4);
  box-shadow: 0 28px 60px -28px rgba(28, 25, 23, .45);
  max-width: 100%;
  margin: 0;
}
.mat-stage-plane img { display: block; width: 100%; height: auto; max-height: 320px; object-fit: cover; }
.mat-stage-emoji {
  font-size: 5rem;
  line-height: 1;
  padding: 48px 64px;
  animation: mat-float 4.5s ease-in-out infinite;
}
@keyframes mat-float {
  0%, 100% { transform: translateY(0) rotateX(6deg) rotateY(-8deg); }
  50% { transform: translateY(-10px) rotateX(2deg) rotateY(6deg); }
}
@media (prefers-reduced-motion: reduce) {
  .mat-stage-emoji { animation: none; }
  .mat-stage-plane { transform: none !important; }
}
.mat-card { position: relative; overflow: hidden; }
.mat-card .jc-meter i { background: var(--card-accent, var(--mat-copper)); }
.mat-chip {
  border: 1px solid var(--line, #e7e5e4);
  background: #fff;
  border-radius: 999px;
  padding: 8px 14px;
  font: inherit;
  cursor: pointer;
  display: inline-flex;
  gap: 6px;
  align-items: center;
}
.mat-chip.on, .mat-chip[aria-pressed="true"] {
  background: var(--accent, var(--mat-copper));
  color: #fff;
  border-color: transparent;
}
.mat-chip .n { opacity: .7; font-size: .85em; }
.mat-filters { display: flex; flex-wrap: wrap; gap: 8px; }
.mat-tools { display: grid; gap: 12px; margin-bottom: 18px; }
.mat-search input {
  width: 100%;
  max-width: 420px;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid var(--line, #e7e5e4);
  font: inherit;
}
.mat-browse-empty { color: var(--muted); }
.mat-card.is-hidden { display: none; }
.mat-profile {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: center;
}
@media (max-width: 860px) {
  .mat-profile { grid-template-columns: 1fr; }
}
.mat-meter { margin: 8px 0; }
.mat-meter-head { display: flex; justify-content: space-between; font-size: .9rem; }
.mat-meter-track {
  height: 8px;
  border-radius: 99px;
  background: #e7e5e4;
  overflow: hidden;
}
.mat-meter-track i {
  display: block;
  height: 100%;
  background: var(--accent, var(--mat-copper));
  border-radius: inherit;
}
.mat-deep-grid, .mat-related-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
@media (max-width: 720px) {
  .mat-deep-grid, .mat-related-cols { grid-template-columns: 1fr; }
}
.mat-deep-card, .mat-deep-lens {
  background: #fff;
  border: 1px solid var(--line, #e7e5e4);
  border-radius: 14px;
  padding: 16px 18px;
}
.mat-deep-kicker { font-size: .75rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.mat-deep-lede { font-size: 1.05rem; }
.mat-rank { list-style: none; padding: 0; margin: 0; }
.mat-rank-row a {
  display: grid;
  grid-template-columns: 2rem 2rem 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--line, #e7e5e4);
  text-decoration: none;
  color: inherit;
}
.mat-rank-n { font-weight: 800; color: var(--muted); }
.mat-cta {
  display: inline-block;
  background: var(--accent, var(--mat-copper));
  color: #fff;
  padding: 10px 16px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
}
.mat-cta.ghost { background: transparent; color: var(--accent, var(--mat-copper)); border: 1px solid currentColor; }
.mat-cta-row { display: flex; gap: 12px; flex-wrap: wrap; }
.mat-legend {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 12px;
  margin: 16px 0;
}
.mat-legend img { width: 96px; height: 96px; object-fit: cover; border-radius: 12px; }
.mat-pills { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 24px; }
.mat-diagram { margin: 0; padding-left: 1.2rem; }
.mat-lab-tools { display: flex; gap: 8px; align-items: center; margin: 8px 0; }
.mat-lab-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.mat-vs-card { min-height: 8rem; }
.score-table .sc-cell {
  display: inline-block;
  min-width: 2.2em;
  text-align: center;
  background: linear-gradient(90deg, var(--jc, var(--mat-copper)) var(--v), transparent var(--v));
  border-radius: 6px;
  padding: 2px 6px;
}
body.materials.lang-ko, body.materials[data-lang="ko"] { word-break: keep-all; }
body.materials.lang-ja, body.materials[data-lang="ja"] { line-height: 1.75; }
body.materials.lang-zh, body.materials[data-lang="zh"] { line-height: 1.75; }
body.materials.lang-ru, body.materials[data-lang="ru"] { line-height: 1.55; }
.mat-risk { max-width: 280px; margin: 0 auto 1.5rem; }
body.materials .mat-hero .kicker { color: var(--mat-copper); }
.mat-quiz-all { display: flex; flex-wrap: wrap; gap: 8px; }
.mat-quiz-all a {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 12px; border-radius: 999px; border: 1px solid var(--line, #e7e5e4);
  text-decoration: none; color: inherit; background: #fff;
}
.mat-lab-empty, .lab-empty { color: var(--muted); }