/* ══════════════════════════════════════════
   MATERIALES.CSS
══════════════════════════════════════════ */

/* ── MATERIAL CARDS GRID ── */
.mat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.3rem;
}

.mat-card {
  padding: 1.8rem;
  border-radius: var(--r-md);
  border: 1px solid var(--border);
  background: linear-gradient(160deg, rgba(255,255,255,0.04), transparent);
  transition: border-color var(--t-med), transform var(--t-med), box-shadow var(--t-med);
  position: relative;
  overflow: hidden;
}
.mat-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top left, rgba(200,169,110,0.07), transparent 55%);
  opacity: 0;
  transition: opacity var(--t-med);
  pointer-events: none;
}
.mat-card:hover { border-color: var(--border-hi); transform: translateY(-5px); box-shadow: var(--shadow-card), var(--shadow-glow); }
.mat-card:hover::before { opacity: 1; }

.mat-cta-card {
  border-color: rgba(200,169,110,0.2);
  background: linear-gradient(145deg, rgba(200,169,110,0.07), transparent);
}

.mat-card-header {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 0.9rem;
}
.mat-icon {
  font-size: 1.6rem;
  color: var(--gold);
  line-height: 1;
  margin-top: 0.1rem;
}
.mat-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.2rem;
}
.mat-card h3 {
  font-family: var(--font-display);
  font-size: 1.45rem;
  letter-spacing: 0.04em;
}
.mat-card p {
  color: var(--muted-2);
  font-size: 0.88rem;
  line-height: 1.8;
  margin-bottom: 1rem;
}

/* Chips */
.mat-chips { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.chip {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 0.38rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--border-hi);
  color: var(--muted-2);
  background: rgba(255,255,255,0.02);
  transition: border-color var(--t-fast), color var(--t-fast), background var(--t-fast);
  cursor: default;
}
.chip:hover {
  border-color: var(--gold-dark);
  color: var(--gold-light);
  background: rgba(200,169,110,0.06);
}
.chip.gold {
  border-color: rgba(200,169,110,0.38);
  color: var(--gold-light);
  background: rgba(200,169,110,0.06);
}
.chip.silver {
  border-color: rgba(200,200,220,0.28);
  color: #c8c8d8;
  background: rgba(200,200,220,0.04);
}

/* ── STYLE TABS ── */
.style-tabs {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}
.style-tab {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 0.5rem 1.2rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted-2);
  background: transparent;
  transition: all var(--t-fast);
}
.style-tab:hover { border-color: var(--border-hi); color: var(--white); }
.style-tab.active {
  border-color: var(--gold-dark);
  color: var(--gold-light);
  background: rgba(200,169,110,0.08);
}

/* ── STYLE PANELS ── */
.style-panels { position: relative; min-height: 120px; }
.style-panel {
  display: none;
  padding: 1.6rem 1.8rem;
  border-radius: var(--r-md);
  border: 1px solid rgba(200,169,110,0.18);
  background: linear-gradient(145deg, rgba(200,169,110,0.05), transparent);
  animation: panelIn .35s cubic-bezier(0.16,1,0.3,1) both;
}
.style-panel.active { display: block; }

@keyframes panelIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.style-panel h4 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  letter-spacing: 0.05em;
  color: var(--gold-light);
  margin-bottom: 0.5rem;
}
.style-panel p {
  color: var(--muted-2);
  font-size: 0.9rem;
  line-height: 1.8;
  max-width: 50rem;
}

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .mat-grid { grid-template-columns: 1fr; }
}