/* ==========================================================================
   ذَرّة | ZARRA — Interactive Electron Configuration Styles
   أنماط موديول التوزيع الإلكتروني التفاعلي والمدارات وقواعد أوفباو وهوند
   ========================================================================== */

.electron-config-workspace {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: var(--spacing-xl);
  align-items: start;
}

.subshell-block {
  background: var(--color-bg-surface-soft);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  transition: all var(--transition-fast);
}

.subshell-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.subshell-title {
  font-family: var(--font-chem-code);
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--color-primary);
}

.subshell-capacity {
  font-size: 0.72rem;
  color: var(--color-text-muted);
}

.orbitals-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.orbital-box {
  width: 54px;
  height: 60px;
  background: var(--color-bg-surface);
  border: 2px solid var(--color-border-medium);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  cursor: pointer;
  position: relative;
  transition: all var(--transition-fast);
  user-select: none;
}

.orbital-box:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.orbital-box.filled {
  border-color: var(--color-mint-dark);
  background: rgba(184, 216, 194, 0.15);
}

.electron-spin-up,
.electron-spin-down {
  font-size: 1.4rem;
  font-weight: 900;
  line-height: 1;
  color: var(--color-primary);
  display: inline-block;
  animation: popIn 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.electron-spin-down {
  color: var(--color-mint-dark);
}

.orbital-label {
  position: absolute;
  bottom: 2px;
  font-size: 0.6rem;
  color: var(--color-text-muted);
  font-family: var(--font-chem-code);
}

/* بطاقة ملخص التوزيع */
.config-summary-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);
  margin-bottom: var(--spacing-xl);
}

.config-formula-display {
  background: var(--color-bg-surface-soft);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  font-family: var(--font-chem-code);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text-main);
  text-align: center;
  direction: ltr;
  letter-spacing: 0.05em;
  border: 1px solid var(--color-border-soft);
  margin: var(--spacing-md) 0;
}

@media (max-width: 991px) {
  .electron-config-workspace {
    grid-template-columns: 1fr;
  }
}