/* ═══════════════════════════════════════════════════════
   Circuit Simulation — Clay Design System Modal Styles
   ═══════════════════════════════════════════════════════ */

/* ── Simulation Modal Overlay ── */
.sim-modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15,15,26,0.7);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 99999;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.sim-modal-overlay.open { display: flex; }

.sim-modal {
  background: var(--canvas, #F4F1FA);
  border-radius: var(--radius-card, 32px);
  padding: 24px;
  width: 100%;
  max-width: 1060px;
  max-height: 92vh;
  position: relative;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
  overflow-y: auto;
}

.sim-modal-close {
  position: absolute;
  top: 16px;
  right: 20px;
  background: rgba(255,255,255,0.85);
  border: 1px solid rgba(160,150,180,0.15);
  border-radius: 14px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: var(--text-muted, #635F69);
  cursor: pointer;
  z-index: 10;
  transition: all var(--dur-fast, 200ms) var(--ease-smooth, cubic-bezier(0.16,1,0.3,1));
  box-shadow: var(--shadow-card, 16px 16px 32px rgba(160,150,180,0.2));
}
.sim-modal-close:hover {
  color: var(--accent-rose, #F43F5E);
  background: rgba(255,255,255,1);
}

/* ── Simulation Header ── */
.sim-header {
  text-align: center;
  margin-bottom: 16px;
  padding-right: 48px;
}
.sim-header h2 {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-primary, #332F3A);
  line-height: 1.2;
}
.sim-header p {
  font-size: 0.85rem;
  color: var(--text-muted, #635F69);
  margin-top: 2px;
}
.sim-badge {
  display: inline-block;
  margin-top: 4px;
  padding: 2px 12px;
  background: var(--accent, #7C3AED);
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 700;
  color: #fff;
}

/* ── Tabs ── */
.sim-tabs {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-bottom: 14px;
}
.sim-tab {
  padding: 8px 20px;
  border: none;
  border-radius: var(--radius-btn, 20px);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 700;
  font-family: var(--font-heading);
  background: rgba(255,255,255,0.7);
  color: var(--text-muted, #635F69);
  transition: all var(--dur-fast, 200ms) var(--ease-smooth, cubic-bezier(0.16,1,0.3,1));
  box-shadow: var(--shadow-card, 16px 16px 32px rgba(160,150,180,0.2));
}
.sim-tab:hover {
  background: rgba(255,255,255,0.9);
  color: var(--text-primary, #332F3A);
}
.sim-tab.active {
  background: linear-gradient(135deg, var(--accent-amber, #F59E0B), var(--accent, #7C3AED));
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-btn-hover, 16px 16px 32px rgba(139,92,246,0.35));
}

/* ── Controls Card ── */
.sim-controls-card {
  background: var(--card-bg, rgba(255,255,255,0.65));
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(160,150,180,0.12);
  border-radius: var(--radius-card, 32px);
  padding: 16px 20px;
  margin-bottom: 14px;
  box-shadow: var(--shadow-card, 16px 16px 32px rgba(160,150,180,0.2));
}
.sim-ctrl-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
}
.sim-ctrl label {
  display: block;
  font-size: 0.8rem;
  font-weight: 700;
  font-family: var(--font-heading);
  color: var(--accent, #7C3AED);
  margin-bottom: 4px;
}
.sim-ctrl .sim-val {
  color: var(--accent-amber, #F59E0B);
  font-weight: 700;
}
.sim-ctrl input[type=range] {
  width: 100%;
  accent-color: var(--accent, #7C3AED);
  cursor: pointer;
}
.sim-hint {
  font-size: 0.7rem;
  color: var(--text-muted, #635F69);
  margin-top: 2px;
}

/* ── Button Row ── */
.sim-btn-row {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 12px;
}
.sim-btn {
  padding: 8px 18px;
  border: none;
  border-radius: var(--radius-btn, 20px);
  cursor: pointer;
  font-weight: 700;
  font-size: 0.85rem;
  font-family: var(--font-body);
  transition: all var(--dur-fast, 200ms);
  line-height: 1;
}
.sim-btn-start {
  background: linear-gradient(135deg, #34D399, var(--accent-emerald, #10B981));
  color: #fff;
  box-shadow: var(--shadow-btn, 12px 12px 24px rgba(139,92,246,0.3));
}
.sim-btn-start:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-btn-hover, 16px 16px 32px rgba(139,92,246,0.35));
}
.sim-btn-reset {
  background: linear-gradient(135deg, #94A3B8, #64748B);
  color: #fff;
  box-shadow: var(--shadow-btn, 12px 12px 24px rgba(139,92,246,0.3));
}
.sim-btn-reset:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-btn-hover, 16px 16px 32px rgba(139,92,246,0.35));
}
.sim-speed {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--text-muted, #635F69);
  font-weight: 600;
}
.sim-spd {
  padding: 4px 10px;
  border-radius: 12px;
  border: none;
  cursor: pointer;
  background: rgba(255,255,255,0.7);
  color: var(--text-muted, #635F69);
  font-weight: 700;
  font-size: 0.78rem;
  transition: all var(--dur-fast, 200ms);
}
.sim-spd:hover {
  background: rgba(255,255,255,0.9);
}
.sim-spd.active {
  background: var(--accent-amber, #F59E0B);
  color: #fff;
}

/* ── SVG Stage ── */
.sim-stage-wrap {
  background: #f8f7fc;
  border: 1px solid rgba(160,150,180,0.08);
  border-radius: var(--radius-card, 32px);
  overflow: hidden;
  padding: 8px;
  margin-bottom: 14px;
  box-shadow: var(--shadow-card, 16px 16px 32px rgba(160,150,180,0.2));
}
.sim-stage-wrap svg.sim-stage {
  width: 100%;
  height: auto;
  display: block;
  background: radial-gradient(circle at 50% 40%, #f0edf5, #e8e4ef);
  border-radius: 12px;
}

/* ── Readings ── */
.sim-readings {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}
.sim-reading {
  background: rgba(255,255,255,0.5);
  border: 1px solid rgba(160,150,180,0.1);
  border-radius: 16px;
  padding: 10px 14px;
  text-align: center;
  border-left: 4px solid var(--accent-amber, #F59E0B);
}
.sim-reading .sim-rk {
  font-size: 0.72rem;
  color: var(--text-muted, #635F69);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-family: var(--font-heading);
}
.sim-reading .sim-rv {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent-amber, #F59E0B);
  margin-top: 2px;
  font-family: var(--font-heading);
}

/* ── Rules Card ── */
.sim-rules-card {
  background: var(--card-bg, rgba(255,255,255,0.65));
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(160,150,180,0.12);
  border-radius: var(--radius-card, 32px);
  padding: 16px 20px;
  margin-bottom: 14px;
  box-shadow: var(--shadow-card, 16px 16px 32px rgba(160,150,180,0.2));
}
.sim-rules-card h3 {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent-rose, #F43F5E);
  margin-bottom: 8px;
}
.sim-rules-card h3.blue { color: var(--accent-blue, #0EA5E9); }
.sim-rules-card h3.green { color: var(--accent-emerald, #10B981); }
.sim-rules-card ul {
  list-style: none;
}
.sim-rules-card ul li {
  padding: 5px 0 5px 20px;
  position: relative;
  font-size: 0.85rem;
  color: var(--text-muted, #635F69);
  line-height: 1.4;
}
.sim-rules-card ul li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--accent-amber, #F59E0B);
  font-weight: bold;
}

/* ── Analogy Card ── */
.sim-analogy {
  background: var(--card-bg, rgba(255,255,255,0.65));
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(160,150,180,0.12);
  border-radius: var(--radius-card, 32px);
  padding: 16px 20px;
  box-shadow: var(--shadow-card, 16px 16px 32px rgba(160,150,180,0.2));
}
.sim-analogy h3 {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent-blue, #0EA5E9);
  margin-bottom: 8px;
}
.sim-analogy ul {
  list-style: none;
}
.sim-analogy ul li {
  padding: 4px 0;
  font-size: 0.82rem;
  color: var(--text-muted, #635F69);
  line-height: 1.5;
}
.sim-highlight {
  color: var(--accent-amber, #F59E0B);
  font-weight: 700;
}

/* ── Modal body scroll ── */
.sim-modal::-webkit-scrollbar { width: 6px; }
.sim-modal::-webkit-scrollbar-track { background: transparent; }
.sim-modal::-webkit-scrollbar-thumb { background: rgba(160,150,180,0.3); border-radius: 3px; }

/* ── Responsive ── */
@media (max-width: 768px) {
  .sim-modal { padding: 16px; }
  .sim-header h2 { font-size: 1.1rem; }
  .sim-ctrl-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .sim-btn-row { flex-direction: column; align-items: stretch; }
  .sim-speed { margin-left: 0; justify-content: center; }
  .sim-readings { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .sim-ctrl-grid { grid-template-columns: 1fr; }
  .sim-readings { grid-template-columns: 1fr; }
  .sim-tabs { flex-direction: column; align-items: stretch; }
}