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

/* ── Modal Overlay (reuse same pattern as conduction) ── */
.conv-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;
}
.conv-modal-overlay.open { display: flex; }

.conv-modal {
  background: var(--canvas, #F4F1FA);
  border-radius: var(--radius-card, 32px);
  padding: 24px;
  width: 100%;
  max-width: 1100px;
  max-height: 92vh;
  position: relative;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
  overflow-y: auto;
}

.conv-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));
}
.conv-modal-close:hover {
  color: var(--accent-rose, #F43F5E);
  background: rgba(255,255,255,1);
}

/* ── Modal header ── */
.conv-header {
  text-align: center;
  margin-bottom: 18px;
  padding-right: 44px;
}
.conv-header h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.2rem, 3vw, 1.6rem);
  font-weight: 800;
  background: linear-gradient(90deg, #60a5fa, #f97316, #ef4444);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 4px;
}
.conv-header p {
  font-size: 0.85rem;
  color: var(--text-muted, #635F69);
}

/* ── Card within modal (for info/legend panels) ── */
.conv-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: 18px 20px;
  margin-bottom: 18px;
  box-shadow: var(--shadow-card, 16px 16px 32px rgba(160,150,180,0.2));
}
.conv-card h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary, #332F3A);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ── Stage wrappere ── */
.conv-stage-wrap {
  background: #05070d;
  border: 1px solid rgba(160,150,180,0.08);
  border-radius: var(--radius-card, 32px);
  overflow: hidden;
  padding: 8px;
  margin-bottom: 12px;
  box-shadow: var(--shadow-card, 16px 16px 32px rgba(160,150,180,0.2));
}
.conv-stage-wrap canvas.conv-stage {
  width: 100%;
  height: auto;
  display: block;
  aspect-ratio: 4/3;
  border-radius: 12px;
}

/* ── Status bar ── */
.conv-status-bar {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0;
  font-size: 13px;
  color: var(--text-muted, #635F69);
}
.conv-status-bar .conv-pill {
  background: rgba(255,255,255,0.5);
  border: 1px solid rgba(160,150,180,0.1);
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 0.82rem;
}
.conv-pill b {
  color: var(--text-primary, #332F3A);
}

/* ── Controls ── */
.conv-ctrl-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
  align-items: center;
}
.conv-btn {
  padding: 10px 18px;
  border: none;
  border-radius: var(--radius-btn, 20px);
  cursor: pointer;
  font-weight: 700;
  font-size: 0.82rem;
  font-family: var(--font-body);
  transition: all var(--dur-fast, 200ms);
  line-height: 1;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #fff;
}
.conv-btn:hover {
  transform: translateY(-1px);
}
.conv-btn:active {
  transform: translateY(1px) scale(0.98);
}
.conv-btn-start {
  background: linear-gradient(135deg, #2fd07a, #1aa85f);
  box-shadow: 0 8px 20px -8px #1aa85f;
}
.conv-btn-start.paused {
  background: linear-gradient(135deg, #ffb347, #ff7a3c);
  box-shadow: 0 8px 20px -8px #ff7a3c;
}
.conv-btn-reset {
  background: linear-gradient(135deg, #5b7cfa, #3a5bd0);
  box-shadow: 0 8px 20px -8px #3a5bd0;
}
.conv-btn-resetall {
  background: linear-gradient(135deg, #556074, #3a4356);
}
.conv-btn-heat {
  background: linear-gradient(135deg, #3a4356, #2a3040);
}
.conv-btn-heat.on {
  background: linear-gradient(135deg, #ff5f6d, #ff2d55);
  box-shadow: 0 8px 24px -6px #ff2d55;
  animation: conv-pulse 1.6s infinite;
}
@keyframes conv-pulse {
  0%, 100% { filter: brightness(1); }
  50% { filter: brightness(1.25); }
}

/* ── Slider block ── */
.conv-slider-block {
  background: rgba(255,255,255,0.5);
  border: 1px solid rgba(160,150,180,0.1);
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 14px;
}
.conv-slider-label {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-muted, #635F69);
  margin-bottom: 8px;
}
.conv-slider-label b {
  color: var(--accent-amber, #F59E0B);
  font-size: 15px;
}
.conv-slider-block input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 8px;
  border-radius: 8px;
  background: linear-gradient(90deg, #3aa0ff, #ffb347, #ff2d55);
  outline: none;
  cursor: pointer;
}
.conv-slider-block input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--accent-amber, #F59E0B);
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0,0,0,0.5);
}
.conv-slider-block input[type="range"]::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--accent-amber, #F59E0B);
  cursor: pointer;
}

/* ── Legend bar ── */
.conv-legend {
  margin-top: 14px;
}
.conv-legend h4 {
  margin: 0 0 8px;
  font-size: 0.82rem;
  color: var(--text-muted, #635F69);
}
.conv-legend-bar {
  height: 16px;
  border-radius: 8px;
  background: linear-gradient(90deg, #1b3a8f, #3aa0ff, #2fd07a, #ffd23c, #ff7a3c, #ff2d55);
}
.conv-legend-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  color: var(--text-muted, #635F69);
  margin-top: 4px;
}

/* ── Info text (from Understanding Convection card) ── */
.conv-info {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--text-muted, #635F69);
}
.conv-info strong { color: var(--accent-amber, #F59E0B); }
.conv-info .conv-hot { color: #ff7a3c; font-weight: 700; }
.conv-info .conv-cold { color: #3aa0ff; font-weight: 700; }
.conv-info ol { margin: 6px 0 6px 18px; }
.conv-info ol li { margin-bottom: 6px; }

/* ── Layout inside modal: simulation + info side-by-side on wide screens ── */
.conv-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}
@media (min-width: 820px) {
  .conv-layout {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  }
}

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

/* ── Responsive ── */
@media (max-width: 768px) {
  .conv-modal { padding: 14px; }
}
@media (max-width: 480px) {
  .conv-ctrl-grid { flex-direction: column; }
  .conv-status-bar { flex-direction: column; }
}