/**
 * MathPulse K-12 - Math Visualizers & Lab CSS (2026 Edition)
 */

.visualizer-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 4vw, 2.25rem);
  box-shadow: var(--shadow-sm);
  margin-bottom: 2rem;
}

.visualizer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 1rem;
}

.visualizer-header h3 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-text);
}

/* Custom Range Slider */
.range-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 8px;
  background: var(--color-bg-secondary);
  border-radius: var(--radius-full);
  outline: none;
  border: 1px solid var(--color-border);
  margin-top: 0.5rem;
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  box-shadow: 0 0 10px var(--color-primary-glow);
  transition: transform var(--transition-fast);
}

.range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.slider-control {
  margin-bottom: 1.25rem;
}

.slider-control label {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.slider-control label strong {
  color: var(--color-text);
}

/* 1. Fraction Explorer Styles */
.fraction-display-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 2rem;
  align-items: center;
}

.fraction-model-pane {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.fraction-pie-svg {
  filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.25));
}

.fraction-bar-container {
  display: flex;
  width: 100%;
  height: 36px;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.fraction-bar-block {
  border-right: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-dim);
  transition: background var(--transition-fast);
}

.fraction-bar-block.filled {
  background: var(--color-primary);
  color: #fff;
}

.fraction-stats-pane {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.fraction-big-math {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 1.75rem;
}

.fraction-stacked {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--color-primary);
  line-height: 1;
}

.fraction-stacked .bar {
  width: 100%;
  height: 3px;
  background: var(--color-primary);
  margin: 4px 0;
}

.math-equals {
  font-size: 2rem;
  color: var(--color-text-muted);
}

.fraction-equivalents {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.equiv-item {
  font-size: 1.05rem;
  color: var(--color-text-muted);
}

.equiv-item strong {
  color: var(--color-text);
}

/* 2. Grapher Styles */
.grapher-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
}

.canvas-wrapper {
  display: flex;
  justify-content: center;
}

.graph-canvas {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  max-width: 100%;
  height: auto;
}

.graph-controls-pane {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.equation-display-card {
  background: var(--color-surface);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: 1rem;
  text-align: center;
  margin-bottom: 1.5rem;
}

.equation-text {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-primary);
}

.graph-info-box {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* 3. Speed Sprint Styles */
.sprint-hero {
  padding: 2.5rem 1rem;
}

.sprint-icon {
  font-size: 3.5rem;
  margin-bottom: 1rem;
}

.sprint-hero h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.sprint-hero p {
  color: var(--color-text-muted);
  font-size: 1.1rem;
  max-width: 500px;
  margin: 0 auto 1.5rem;
}

.sprint-best-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.25rem;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  color: var(--color-warning);
}

.sprint-active-header {
  display: flex;
  align-items: center;
  justify-content: space-around;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1rem;
  margin-bottom: 2rem;
}

.sprint-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-dim);
  text-transform: uppercase;
}

.stat-value {
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--color-text);
}

.time-val.time-danger {
  color: var(--color-danger);
  animation: pulse 0.6s infinite alternate;
}

@keyframes pulse {
  from { transform: scale(1); }
  to { transform: scale(1.15); }
}

.sprint-question-box {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  text-align: center;
  margin-bottom: 2rem;
}

.sprint-math-prompt {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 900;
  letter-spacing: 0.05em;
  color: var(--color-primary);
}

.sprint-options-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.sprint-opt-btn {
  padding: 1.5rem;
  font-size: 1.75rem;
  font-weight: 800;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: all var(--transition-fast);
}

.sprint-opt-btn:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

/* 4. Pythagorean Explorer Styles */
.triangle-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 2rem;
  align-items: center;
}

.triangle-svg-wrapper {
  display: flex;
  justify-content: center;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.triangle-controls-pane {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.pythagorean-equation-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
  text-align: center;
}

.math-eq {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--color-primary);
  margin-bottom: 0.35rem;
}

.math-sub {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-bottom: 0.35rem;
}

.math-result {
  font-size: 1.15rem;
  color: #f59e0b;
}

.triangle-angles-chip {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.triangle-angles-chip strong {
  color: var(--color-text);
}

@media (max-width: 840px) {
  .fraction-display-grid,
  .grapher-layout,
  .triangle-layout {
    grid-template-columns: 1fr;
  }
}