/* ==========================================================================
   ذَرّة | ZARRA — Solutions & Concentration Module Styles
   المحاليل والتركيز والتحضير المعملي وقانون التخفيف
   ========================================================================== */

.solutions-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

/* شريط تبويبات الأنماط */
.sol-nav-tabs {
  display: flex;
  gap: var(--spacing-sm);
  border-bottom: 2px solid var(--color-border-soft);
  padding-bottom: 2px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.sol-tab-btn {
  background: transparent;
  border: none;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-text-muted);
  cursor: pointer;
  border-bottom: 3px solid transparent;
  transition: all var(--transition-fast);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

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

/* بطاقات المحاليل */
.sol-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-normal);
}

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

/* شبكة محاكي التركيز */
.sol-molarity-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--spacing-xl);
  align-items: start;
}

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

/* محاكاة الكأس الحجمي التفاعلي */
.beaker-theater {
  background: linear-gradient(180deg, #f8fafc, #edf2f7);
  border: 1.5px solid var(--color-border-soft);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  min-height: 380px;
}

.virtual-beaker {
  width: 180px;
  height: 260px;
  border: 4px solid #94a3b8;
  border-top: none;
  border-radius: 0 0 24px 24px;
  position: relative;
  background: rgba(255, 255, 255, 0.4);
  box-shadow: inset 0 0 16px rgba(0, 0, 0, 0.08), 0 10px 20px rgba(0, 0, 0, 0.06);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

/* سائل المحلول */
.beaker-liquid {
  width: 100%;
  height: 60%;
  background: rgba(59, 130, 246, 0.6);
  transition: height 0.3s ease, background-color 0.3s ease, opacity 0.3s ease;
  position: relative;
  border-radius: 0 0 20px 20px;
}

.beaker-liquid-surface {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 8px;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
}

/* تدريجات الكأس */
.beaker-ticks {
  position: absolute;
  top: 10px;
  bottom: 20px;
  right: 6px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  pointer-events: none;
}

.beaker-tick {
  width: 16px;
  height: 2px;
  background: #64748b;
  position: relative;
}

.beaker-tick-label {
  position: absolute;
  right: 20px;
  top: -7px;
  font-family: var(--font-chem-code);
  font-size: 0.65rem;
  font-weight: 700;
  color: #64748b;
}

/* شارات مؤشرات التركيز */
.molarity-readout-card {
  background: #fff;
  border: 1.5px solid var(--color-border-soft);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md) var(--spacing-lg);
  text-align: center;
  margin-top: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  width: 100%;
}

.molarity-val {
  font-family: var(--font-chem-code);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-primary);
}

.sol-control-group {
  margin-bottom: var(--spacing-lg);
}

.sol-control-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

.sol-control-label {
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--color-text-subtle);
}

.sol-control-val {
  font-family: var(--font-chem-code);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-primary);
}

/* شبكة اختيار المذاب */
.solute-pills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 8px;
  margin-bottom: var(--spacing-lg);
}

.solute-pill-btn {
  background: #fff;
  border: 1.5px solid var(--color-border-soft);
  border-radius: var(--radius-md);
  padding: 8px 10px;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 8px;
  text-align: right;
}

.solute-pill-btn:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.solute-pill-btn.active {
  background: rgba(233, 75, 103, 0.08);
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(233, 75, 103, 0.2);
}

.solute-pill-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  flex-shrink: 0;
  border: 1px solid rgba(0, 0, 0, 0.15);
}

/* مسرح التخفيف */
.dilution-stage {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--spacing-lg);
  align-items: center;
  margin: var(--spacing-xl) 0;
}

@media (max-width: 768px) {
  .dilution-stage {
    grid-template-columns: 1fr;
    text-align: center;
  }
}