/* BenChemie4-1 — Components CSS: Cards, Formulas, Aufgaben, Merkboxen */

/* ─── Concept Card ─── */
.concept-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  margin: 20px 0;
  position: relative;
  overflow: hidden;
}

.concept-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--accent);
}

.concept-card h3 {
  margin-top: 0;
  color: var(--text-primary);
  font-size: 1rem;
}

/* ─── Formula Block ─── */
.formula-block {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-left: 4px solid var(--s-block);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 20px 0;
  overflow-x: auto;
}

.formula-block .formula-title {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--s-block);
  margin-bottom: 12px;
}

.formula-block .katex-display {
  margin: 8px 0 !important;
}

.formula-inline {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  display: block;
  margin: 6px 0;
  color: var(--text-primary);
}

.formula-vars {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.formula-vars table {
  width: 100%;
  font-size: 0.85rem;
  border-collapse: collapse;
}

.formula-vars td {
  padding: 3px 8px;
  color: var(--text-secondary);
}

.formula-vars td:first-child {
  font-family: var(--font-mono);
  color: var(--accent);
  width: 80px;
}

/* ─── Merkbox ─── */
.merkbox {
  background: color-mix(in srgb, var(--p-block) 8%, transparent);
  border: 1px solid color-mix(in srgb, var(--p-block) 35%, transparent);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin: 20px 0;
  position: relative;
}

.merkbox::before {
  content: 'MERKE';
  position: absolute;
  top: -11px;
  left: 16px;
  background: var(--p-block);
  color: #0f1117;
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  padding: 2px 10px;
  border-radius: 20px;
}

.merkbox p {
  color: var(--text-primary);
  margin: 0;
  font-size: 0.95rem;
}

.merkbox ul {
  margin: 8px 0 0 0;
}

.merkbox li {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ─── Aufgabe (collapsible practice problem) ─── */
.aufgabe {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin: 12px 0;
  overflow: hidden;
  transition: border-color var(--transition);
}

.aufgabe:hover {
  border-color: var(--border-light);
}

.aufgabe-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  cursor: pointer;
  user-select: none;
  background: var(--bg-secondary);
  transition: background var(--transition);
}

.aufgabe-header:hover {
  background: var(--bg-tertiary);
}

.aufgabe-num {
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 15%, transparent);
  padding: 2px 8px;
  border-radius: 20px;
  flex-shrink: 0;
}

.aufgabe-title {
  flex: 1;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}

.aufgabe-chevron {
  color: var(--text-muted);
  font-size: 0.8rem;
  transition: transform var(--transition);
  flex-shrink: 0;
}

.aufgabe.open .aufgabe-chevron {
  transform: rotate(180deg);
}

.aufgabe-body {
  display: none;
  padding: 0 20px 20px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
}

.aufgabe.open .aufgabe-body {
  display: block;
}

.aufgabe-text {
  padding: 16px 0 12px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  border-bottom: 1px dashed var(--border);
  margin-bottom: 12px;
}

.aufgabe-solution-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--success);
  cursor: pointer;
  border: none;
  background: color-mix(in srgb, var(--success) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--success) 30%, transparent);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  font-family: inherit;
}

.aufgabe-solution-toggle:hover {
  background: color-mix(in srgb, var(--success) 20%, transparent);
}

.aufgabe-solution {
  display: none;
  margin-top: 16px;
  padding: 16px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}

.aufgabe-solution.visible {
  display: block;
}

.aufgabe-solution p,
.aufgabe-solution li {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.aufgabe-solution ol {
  padding-left: 1.5em;
}

.aufgabe-solution table {
  border-collapse: collapse;
  margin: 8px 0;
  font-size: 0.85rem;
}

.aufgabe-solution td {
  padding: 4px 12px;
  border: 1px solid var(--border);
  color: var(--text-secondary);
}

/* ─── Interactive Controls ─── */
.control-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin: 12px 0;
}

.control-row label {
  font-size: 0.85rem;
  color: var(--text-muted);
  min-width: 80px;
}

.ctrl-select {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-family: inherit;
  cursor: pointer;
  outline: none;
  transition: border-color var(--transition);
}

.ctrl-select:focus,
.ctrl-select:hover {
  border-color: var(--accent);
}

.ctrl-input {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-family: var(--font-mono);
  outline: none;
  width: 120px;
  transition: border-color var(--transition);
}

.ctrl-input:focus {
  border-color: var(--accent);
}

.ctrl-slider {
  accent-color: var(--accent);
  height: 4px;
  cursor: pointer;
}

.ctrl-btn {
  background: var(--accent);
  color: white;
  border: none;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: all var(--transition);
}

.ctrl-btn:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

.ctrl-btn.secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

/* ─── Readout boxes ─── */
.readout-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin: 16px 0;
}

.readout {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px;
  text-align: center;
}

.readout .readout-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 4px;
}

.readout .readout-value {
  font-size: 1.1rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--accent);
}

.readout .readout-unit {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ─── Step-by-step solution ─── */
.step-solution {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-top: 16px;
  font-size: 0.9rem;
}

.step-solution .step {
  display: flex;
  gap: 16px;
  margin-bottom: 16px;
  align-items: flex-start;
}

.step-solution .step:last-child { margin-bottom: 0; }

.step-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  flex-shrink: 0;
}

.step-content {
  flex: 1;
  padding-top: 4px;
}

/* ─── Flame color boxes ─── */
.flame-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 16px 0;
}

@media (max-width: 500px) {
  .flame-grid { grid-template-columns: repeat(2, 1fr); }
}

.flame-box {
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  border: 2px solid transparent;
}

.flame-box:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.flame-box.selected {
  border-color: white;
  transform: translateY(-3px);
}

.flame-box .flame-sym {
  font-size: 1.8rem;
  font-weight: 800;
  color: white;
  text-shadow: 0 0 20px rgba(255,255,255,0.5);
  line-height: 1;
}

.flame-box .flame-name {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.85);
  margin-top: 4px;
}

.flame-box .flame-color-label {
  font-size: 0.7rem;
  color: rgba(255,255,255,0.7);
  font-style: italic;
  margin-top: 2px;
}

.flame-info {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px;
  margin-top: 12px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  min-height: 60px;
}

/* ─── IE anomaly markers ─── */
.anomaly-legend {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin: 8px 0;
  font-size: 0.8rem;
}

.anomaly-item {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
}

.anomaly-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

/* ─── Periodic table mini ─── */
.mini-pt-wrapper {
  overflow-x: auto;
  margin: 16px 0;
}

#mini-pt-canvas {
  display: block;
  margin: 0 auto;
}

/* ─── Chart containers ─── */
.chart-wrapper {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  margin: 20px 0;
  position: relative;
}

.chart-wrapper canvas {
  max-height: 360px;
}

/* ─── Orbital diagram ─── */
.orbital-diagram {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  margin: 16px 0;
  overflow-x: auto;
}

.orbital-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 8px 0;
}

.orbital-label {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  width: 35px;
  text-align: right;
}

.orbital-boxes {
  display: flex;
  gap: 4px;
}

.orbital-box {
  width: 40px;
  height: 40px;
  border: 1.5px solid var(--border-light);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-family: var(--font-mono);
  color: var(--text-primary);
  position: relative;
  background: var(--bg-tertiary);
}

.orbital-box.s-type { border-color: color-mix(in srgb, var(--s-block) 60%, transparent); background: color-mix(in srgb, var(--s-block) 8%, transparent); }
.orbital-box.p-type { border-color: color-mix(in srgb, var(--p-block) 60%, transparent); background: color-mix(in srgb, var(--p-block) 8%, transparent); }
.orbital-box.d-type { border-color: color-mix(in srgb, var(--d-block) 60%, transparent); background: color-mix(in srgb, var(--d-block) 8%, transparent); }

.arrow-up   { color: #ff6b6b; }
.arrow-down { color: #74b9ff; }

/* ─── Poster Builder (2.13) ─── */
.poster-output {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px;
  margin: 20px 0;
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: 32px;
  align-items: start;
}

@media (max-width: 600px) {
  .poster-output {
    grid-template-columns: 1fr;
  }
}

.poster-info h2 {
  font-size: 2rem;
  margin-bottom: 4px;
}

.poster-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 16px;
  font-size: 0.85rem;
}

.poster-table td {
  padding: 6px 10px;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
}

.poster-table td:first-child {
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  width: 140px;
}

.poster-table td:last-child {
  color: var(--text-primary);
  font-weight: 600;
}

/* ─── Tabs ─── */
.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}

.tab-btn {
  padding: 8px 16px;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: all var(--transition);
  margin-bottom: -1px;
}

.tab-btn:hover {
  color: var(--text-primary);
}

.tab-btn.active {
  border-bottom-color: var(--accent);
  color: var(--accent);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

/* ─── Info box ─── */
.info-box {
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  margin: 16px 0;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.info-box strong {
  color: var(--accent);
}

/* ─── Energy level diagram (SVG/Canvas based) ─── */
.energy-diagram {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin: 16px 0;
  overflow: hidden;
}

/* ─── Atom symbol display ─── */
.atom-symbol-big {
  font-size: 4rem;
  font-weight: 900;
  line-height: 1;
  color: var(--text-primary);
}

.atom-z {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}