/**
 * ELEMENTA - Formador de Compuestos (inorgánicos y orgánicos)
 */

.cb-tabs {
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  margin-bottom: 18px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
}

.cb-tab {
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 700;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.cb-tab.active {
  background: var(--accent-cyan);
  color: #fff;
  box-shadow: 0 2px 10px rgba(2, 132, 199, 0.3);
}

[data-theme="dark"] .cb-tab.active {
  color: #000;
}

.cb-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 20px;
  align-items: start;
}

.cb-controls,
.cb-result {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
}

.cb-result {
  position: sticky;
  top: 84px;
}

.cb-step {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.cb-step[hidden] {
  display: none;
}

.cb-step-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.cb-step-label > b:first-child {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent-cyan);
  color: #fff;
  font-size: 12px;
}

.cb-step-label small {
  font-weight: 500;
  color: var(--text-muted);
}

.cb-count {
  color: var(--accent-cyan);
  font-size: 15px;
}

/* Tipos / funciones */
.cb-type-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 8px;
}

.cb-type-chip {
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 9px 11px;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--border-color);
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.cb-type-chip:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-1px);
}

.cb-type-chip.active {
  border-color: var(--accent-cyan);
  background: color-mix(in srgb, var(--accent-cyan) 12%, var(--bg-surface));
  box-shadow: inset 0 0 0 1px var(--accent-cyan);
}

.cb-type-name {
  font-size: 13px;
  font-weight: 800;
}

.cb-type-desc {
  font-size: 11px;
  color: var(--text-muted);
}

/* Selector de elementos */
.cb-element-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(56px, 1fr));
  gap: 6px;
}

.cb-el {
  position: relative;
  aspect-ratio: 1 / 1.05;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--el-color);
  background: color-mix(in srgb, var(--el-color) 16%, var(--bg-surface));
  color: var(--text-primary);
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  min-width: 0;
}

.cb-el:hover {
  transform: translateY(-2px);
}

.cb-el.selected {
  box-shadow: 0 0 0 3px var(--accent-cyan), 0 6px 14px rgba(0, 0, 0, 0.15);
  transform: translateY(-2px) scale(1.04);
  z-index: 1;
}

.cb-el-num {
  position: absolute;
  top: 2px;
  left: 4px;
  font-size: 8px;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-muted);
}

.cb-el-sym {
  font-size: 18px;
  font-weight: 900;
  line-height: 1.1;
}

.cb-el-name {
  font-size: 8.5px;
  font-weight: 600;
  color: var(--text-secondary);
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Valencias y posiciones */
.cb-valence-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.cb-valence-label,
.cb-valence-fixed {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 600;
}

.cb-valence-fixed b {
  color: var(--text-primary);
}

.cb-val-btn {
  min-width: 42px;
  padding: 6px 12px;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--border-color);
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  font-weight: 800;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.cb-val-btn.active {
  background: var(--accent-cyan);
  border-color: var(--accent-cyan);
  color: #fff;
}

[data-theme="dark"] .cb-val-btn.active {
  color: #000;
}

/* Carbonos */
.cb-stepper {
  display: flex;
  align-items: center;
  gap: 10px;
}

.cb-stepper input[type="range"] {
  flex: 1;
  accent-color: var(--accent-cyan);
}

.cb-stepper-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  font-size: 18px;
  font-weight: 800;
  cursor: pointer;
}

/* Sustituyentes */
.cb-subs-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.cb-sub-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}

.cb-sub-row .compare-dropdown {
  width: auto;
  flex: 1;
  padding: 7px 10px;
  font-size: 13px;
}

.cb-sub-row .compare-dropdown[name="pos"] {
  flex: 0 0 76px;
}

.cb-sub-del {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: none;
  background: var(--border-subtle);
  color: var(--text-secondary);
  cursor: pointer;
}

.cb-sub-del:hover {
  background: var(--accent-rose);
  color: #fff;
}

.cb-empty {
  font-size: 12px;
  color: var(--text-muted);
}

#cbAddSub {
  align-self: flex-start;
}

#cbAddSub:disabled {
  opacity: 0.4;
  cursor: default;
}

/* Ejemplos */
.cb-examples {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.cb-example-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.cb-random {
  border-color: var(--accent-purple);
}

/* Resultado */
.cb-formula-card {
  position: relative;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent-cyan) 14%, var(--bg-surface)), var(--bg-surface));
  border: 1.5px solid color-mix(in srgb, var(--accent-cyan) 45%, transparent);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  text-align: center;
  animation: fadeIn 0.25s ease;
}

.cb-type-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--accent-cyan);
  background: var(--bg-surface);
  border: 1px solid color-mix(in srgb, var(--accent-cyan) 40%, transparent);
  border-radius: var(--radius-full);
  padding: 3px 10px;
}

.cb-formula {
  font-size: clamp(36px, 6vw, 56px);
  font-weight: 900;
  font-family: 'Inter', sans-serif;
  letter-spacing: 1px;
  margin: 8px 0 4px;
  color: var(--text-primary);
}

.cb-formula sub,
.cb-reaction sub,
.cb-mini-card sub {
  font-size: 0.6em;
}

.cb-mass {
  font-size: 13px;
  color: var(--text-secondary);
}

.cb-iupac {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: clamp(22px, 3.4vw, 32px);
  font-weight: 900;
  margin: 8px 0 4px;
  color: var(--text-primary);
  word-break: break-word;
}

.cb-common {
  font-size: 14px;
  color: var(--text-secondary);
}

.cb-renumber-note {
  margin-top: 8px;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent-amber);
}

.cb-names {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.cb-name-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-top: 4px solid var(--card-accent);
  border-radius: var(--radius-md);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  animation: fadeIn 0.3s ease;
}

.cb-name-sistematica { --card-accent: #2563eb; }
.cb-name-stock { --card-accent: #7c3aed; }
.cb-name-tradicional { --card-accent: #d97706; }

.cb-name-head {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.cb-name-title {
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--card-accent);
}

.cb-name-badge {
  font-size: 10.5px;
  color: var(--text-muted);
}

.cb-name-value {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 6px;
  font-size: 16px;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.25;
}

.cb-name-note {
  font-size: 11.5px;
  color: var(--text-muted);
  line-height: 1.35;
}

.cb-speak {
  flex-shrink: 0;
  border: none;
  background: var(--bg-surface-elevated);
  border-radius: 50%;
  width: 28px;
  height: 28px;
  cursor: pointer;
  font-size: 13px;
}

.cb-speak:hover {
  background: var(--accent-cyan);
}

.cb-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 14px 16px;
}

.cb-box h4 {
  font-size: 14px;
  font-weight: 800;
  margin-bottom: 8px;
}

.cb-reaction {
  font-size: 20px;
  font-weight: 700;
  text-align: center;
  padding: 6px 0;
  color: var(--text-primary);
  overflow-x: auto;
  white-space: nowrap;
}

.cb-reaction .coef {
  color: var(--accent-rose);
  margin-right: 1px;
}

.cb-reaction .arrow {
  color: var(--accent-cyan);
  margin: 0 6px;
}

.cb-steps {
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13.5px;
  color: var(--text-secondary);
}

.cb-steps b {
  color: var(--text-primary);
}

/* Orgánicos */
.cb-org-formulas {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.cb-mini-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.cb-mini-card.cb-wide {
  grid-column: 1 / -1;
}

.cb-mini-card span {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  color: var(--text-muted);
}

.cb-mini-card b {
  font-size: 17px;
  color: var(--text-primary);
  overflow-wrap: anywhere;
}

.cb-condensed {
  font-family: 'JetBrains Mono', monospace;
  font-size: 16px !important;
}

.cb-svg {
  width: 100%;
  max-height: 230px;
  display: block;
  color: var(--text-primary);
}

.cb-bond {
  stroke: currentColor;
  stroke-width: 2.6;
  stroke-linecap: round;
}

.cb-bond-h {
  stroke-width: 1.6;
  opacity: 0.6;
}

.cb-atom circle {
  fill: var(--bg-surface);
}

.cb-atom text,
.cb-h {
  font-size: 16px;
  font-weight: 800;
  text-anchor: middle;
  font-family: 'Inter', sans-serif;
}

.cb-h {
  fill: currentColor;
  opacity: 0.7;
}

.cb-cnum {
  font-size: 11px;
  font-weight: 700;
  fill: var(--accent-cyan);
  text-anchor: middle;
  font-family: 'JetBrains Mono', monospace;
}

.cb-svg-legend {
  font-size: 11.5px;
  color: var(--text-muted);
  text-align: center;
}

.cb-single-carbon {
  text-align: center;
  font-size: 40px;
  font-weight: 900;
  padding: 20px 0;
  font-family: 'JetBrains Mono', monospace;
}

.cb-single-carbon sub {
  font-size: 0.6em;
}

.cb-result .tool-error ul {
  margin: 6px 0 0 18px;
}

/* ---------- Responsive ---------- */
@media (max-width: 1000px) {
  .cb-layout {
    grid-template-columns: 1fr;
  }
  .cb-result {
    position: static;
  }
}

@media (max-width: 640px) {
  .cb-tabs {
    display: flex;
  }
  .cb-tab {
    flex: 1;
    padding: 9px 10px;
  }
  .cb-names {
    grid-template-columns: 1fr;
  }
  .cb-org-formulas {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .cb-type-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .cb-element-grid {
    grid-template-columns: repeat(auto-fill, minmax(48px, 1fr));
  }
  .cb-el-name {
    display: none;
  }
  .cb-reaction {
    font-size: 16px;
  }
}