/* ==========================================================================
   موديول الكيمياء الحرارية وقانون هس | ZARRA Thermochemistry CSS
   ========================================================================== */

.thermo-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

@media (max-width: 992px) {
  .thermo-grid {
    grid-template-columns: 1fr;
  }
}

.thermo-card {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.thermo-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-strong);
}

.thermo-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-border-soft);
}

.thermo-card-title {
  font-size: 1.2rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text-main);
  margin: 0;
}

/* لوحة رسم منحنى الطاقة */
.energy-diagram-stage {
  width: 100%;
  height: 300px;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.98) 0%, rgba(30, 41, 59, 0.95) 100%);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-soft);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.energy-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.energy-stat-box {
  background: var(--color-bg-surface-soft);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-soft);
  text-align: center;
}

.energy-stat-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-weight: 700;
}

.energy-stat-val {
  font-family: var(--font-chem-code);
  font-size: 1.1rem;
  font-weight: 800;
  margin-top: 2px;
}

.energy-stat-val.negative {
  color: #ef4444;
}

.energy-stat-val.positive {
  color: #3b82f6;
}

/* بطاقات خطوات قانون هس */
.hess-step-card {
  background: var(--color-bg-surface-soft);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.hess-step-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.hess-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.hess-btn-tool {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-sm);
  padding: 3px 8px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.hess-btn-tool:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.hess-target-box {
  background: rgba(233, 75, 103, 0.08);
  border: 1px dashed var(--color-primary);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

/* حاسبة كمية الحرارة */
.calorimetry-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

@media (max-width: 768px) {
  .calorimetry-grid {
    grid-template-columns: 1fr;
  }
}