:root {
  --primary-color: #2c3e50;
  --secondary-color: #3498db;
  --accent-color: #e74c3c;
  --light-color: #ecf0f1;
  --dark-color: #34495e;
  --success-color: #2ecc71;
  --warning-color: #f39c12;
  --danger-color: #e74c3c;
  
  /* EI component colors - More distinct colors for each tab */
  --sample-prep-color: #2980b9;       /* Darker Blue */
  --sample-prep-light: #ebf5ff;       /* Light blue */
  --instrumentation-color: #8e44ad;   /* Purple */
  --instrumentation-light: #f5ebff;   /* Light purple */
  --reagent-color: #d35400;           /* Deep Orange */
  --reagent-light: #fff0eb;           /* Light orange */
  --waste-color: #16a085;             /* Deep Teal */
  --waste-light: #e5f5f2;             /* Light teal */
  --practicality-color: #27ae60;      /* Green */
  --practicality-light: #ebffef;      /* Light green */
  
  /* Score colors */
  --ideal-color: #2E7D32;             /* Dark green for "No impact" */
  --good-color: #2ecc71;              /* Light green for "Minimal impact" */
  --medium-color: #f39c12;            /* Yellow for "Considerable impact" */
  --bad-color: #e74c3c;               /* Red for "Serious impact" */
  
  /* Practicality result colors */
  --practicality-excellent: #2ecc71;  /* Green for Excellent practicality */
  --practicality-acceptable: #f39c12; /* Orange for Acceptable practicality */
  --practicality-impractical: #e74c3c; /* Red for Impractical */
  
  /* UI colors */
  --text-color: #000000;
  --border-radius: 8px;               /* Increased border radius */
  --box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
  --card-gradient: linear-gradient(to bottom, #f8cccc, #f86767);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  margin: 0;
  padding: 0;
  color: var(--text-color);
  background-color: #f8f9fa;
  line-height: 1.6;
  font-size: 20px; /* Even larger base font size */
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

.app-header {
  background-color: var(--primary-color);
  color: white;
  padding: 15px 0;
  box-shadow: var(--box-shadow);
}

.app-footer {
  background-color: var(--light-color);
  padding: 15px 0;
  margin-top: 30px;
  text-align: center;
  font-size: 0.9em;
  color: var(--dark-color);
}

.card {
  background: var(--card-gradient);
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  padding: 20px;
  margin-bottom: 20px;
  border: 1px solid #eaeaea;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
}

/* Component-specific styling */
.sample-prep-card {
  border-top: 4px solid var(--sample-prep-color);
  background: linear-gradient(to bottom, var(--sample-prep-light), white);
}

.reagent-card {
  border-top: 4px solid var(--reagent-color);
  background: linear-gradient(to bottom, var(--reagent-light), white);
}

.instrumentation-card {
  border-top: 4px solid var(--instrumentation-color);
  background: linear-gradient(to bottom, var(--instrumentation-light), white);
}

.waste-card {
  border-top: 4px solid var(--waste-color);
  background: linear-gradient(to bottom, var(--waste-light), white);
}

.form-section {
  margin-bottom: 30px;
  padding: 15px;
  border-radius: var(--border-radius);
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.form-section h3 {
  margin-top: 0;
  color: var(--primary-color);
  border-bottom: 1px solid #eee;
  padding-bottom: 10px;
}

/* Background colors for different sections */
.presynthesis-section {
  background-color: #eaf3ff; /* Light blue */
}

/* _اختياري_: عدّل اللون إلى أي قيمة تريدها */
.presynthesis-options {
  background-color: #d3e7fa;  /* لون أزرق فاتح للتمييز */
  border-radius: 5px;
  padding: 15px;
  margin: 10px 0;
}

/* إذا أردت أن تظهر المساحة الداخلية بارزة قليلًا */
.presynthesis-options .create-form-group {
  margin-left: 0; /* (إذا كان createFormGroup يضيف مسافة تلقائية يمكنك تصغيرها هنا) */
}

/* Wrap all “Sampling procedure” sub‐options */
.sampling-options {
  background-color: #d1e9ff;   /* light blue – change to whatever you like */
  border-radius: 5px;
  padding: 15px;
  margin: 10px 0;
}

/* Wrap all “Extraction procedure” sub‐options */
.extraction-options {
  background-color: #fdddfb;   /* light peach – change to whatever you like */
  border-radius: 5px;
  padding: 15px;
  padding-bottom: 0px;
  padding-top: 0px;
  margin: 10px 0;
}


.sampling-procedure-section {
  background-color: #f0fff7; /* Light mint */
}

.extraction-procedure-section {
  background-color: #fff7f0; /* Light peach */
}

.other-conditions-section {
  background-color: #eae0f7; /* Light lavender */
}

/* Instrumentation section colors */
.energy-consumption-section {
  background-color: #fff0f0; /* Light pink */
}

.emissions-section {
  background-color: #f0ffff; /* Light cyan */
}

.automation-section {
  background-color: #fffff0; /* Light yellow */
}

.multianalyte-section {
  background-color: #f7fff0; /* Light lime */
}

.miniaturized-section {
  background-color: #fff0f7; /* Light rose */
}

/* Waste section colors */
.waste-volume-section {
  background-color: #f0f0ff; /* Light periwinkle */
}

.biodegradability-section {
  background-color: #f0fff0; /* Light mint */
}

.treatment-section {
  background-color: #fff5f5; /* Light salmon */
}

/* Practicality section colors */
.nature-method-section {
  background-color: #f5f0ff; /* Light orchid */
}

.qbd-section {
  background-color: #f0f5ff; /* Light azure */
}

.validation-section {
  background-color: #fff0f5; /* Light pink */
}

.sensitivity-section {
  background-color: #f5fff0; /* Light chartreuse */
}

.reagent-cost-section {
  background-color: #fff5f0; /* Light coral */
}

.instrument-cost-section {
  background-color: #f5f0f5; /* Light plum */
}

.availability-section {
  background-color: #f0f5f5; /* Light teal */
}

.maintenance-section {
  background-color: #f5f5f0; /* Light tan */
}

.throughput-section {
  background-color: #f0f0f5; /* Light slate */
}

.reusability-section {
  background-color: #f5f5ff; /* Light periwinkle */
}

/* Info cards for each component */
.info-card {
  background-color: #f8f9fa;
  border-left: 4px solid #ddd;
  padding: 15px;
  margin-bottom: 20px;
  border-radius: var(--border-radius);
  box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.info-card-title {
  font-weight: bold;
  margin-bottom: 10px;
  font-size: 1.1em;
}

.info-card-content {
  color: #555;
  line-height: 1.5;
}

.info-card-content ul {
  padding-left: 20px;
  margin-top: 10px;
}

.info-card-sample-prep {
  border-left-color: var(--sample-prep-color);
}

.info-card-reagent {
  border-left-color: var(--reagent-color);
}

.info-card-instrumentation {
  border-left-color: var(--instrumentation-color);
}

.info-card-waste {
  border-left-color: var(--waste-color);
}

.info-card-practicality {
  border-left-color: var(--practicality-color);
}

.practicality-card {
  border-top: 4px solid var(--practicality-color);
  background: linear-gradient(to bottom, var(--practicality-light), white);
}

.form-group {
  margin-bottom: 25px;
  animation: fadeIn 0.6s ease-out;
}

.form-group label {
  font-size: 1.1rem;
  font-weight: 500;
  display: block;
  color: var(--primary-color);
}

.form-control {
  width: 100%;
  padding: 14px 18px;
  border: 1px solid #e0e0e0;
  border-radius: var(--border-radius);
  font-size: 18px;
  background-color: #f9f9f9;
  transition: all 0.3s ease;
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.05);
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.form-control:focus {
  outline: none;
  border-color: var(--secondary-color);
  background-color: #fff;
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.05), 0 0 5px rgba(52, 152, 219, 0.3);
}

.btn {
  display: inline-block;
  font-weight: 500;
  text-align: center;
  white-space: nowrap;
  vertical-align: middle;
  user-select: none;
  border: 1px solid transparent;
  padding: 12px 24px;
  font-size: 18px;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all 0.3s ease-in-out;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  position: relative;
  overflow: hidden;
}

.btn:after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 5px;
  height: 5px;
  background: rgba(255, 255, 255, 0.5);
  opacity: 0;
  border-radius: 100%;
  transform: scale(1, 1) translate(-50%);
  transform-origin: 50% 50%;
}

.btn:focus:not(:active)::after {
  animation: ripple 1s ease-out;
}

@keyframes ripple {
  0% {
    transform: scale(0, 0);
    opacity: 0.5;
  }
  20% {
    transform: scale(25, 25);
    opacity: 0.3;
  }
  100% {
    opacity: 0;
    transform: scale(40, 40);
  }
}

.btn-primary {
  background: linear-gradient(135deg, var(--secondary-color), #1a6ba0);
  color: white;
}

.btn-primary:hover {
  background: linear-gradient(135deg, #2980b9, #3498db);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.btn-primary:active {
  transform: translateY(1px);
  box-shadow: 0 2px 3px rgba(0,0,0,0.1);
}

.btn-success {
  background: linear-gradient(135deg, var(--success-color), #27ae60);
  color: white;
}

.btn-success:hover {
  background: linear-gradient(135deg, #27ae60, #2ecc71);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.btn-success:active {
  transform: translateY(1px);
  box-shadow: 0 2px 3px rgba(0,0,0,0.1);
}

.btn-danger {
  background: linear-gradient(135deg, var(--danger-color), #c0392b);
  color: white;
}

.btn-danger:hover {
  background: linear-gradient(135deg, #c0392b, #e74c3c);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.btn-danger:active {
  transform: translateY(1px);
  box-shadow: 0 2px 3px rgba(0,0,0,0.1);
}

.result-container {
  padding: 20px;
  border-radius: var(--border-radius);
  margin-top: 20px;
}

.result-ideal {
  background-color: rgba(0, 100, 0, 0.2);
  border: 1px solid var(--ideal-color);
  color: var(--ideal-color);
}

.result-good {
  background-color: rgba(46, 204, 113, 0.2);
  border: 1px solid var(--good-color);
  color: var(--good-color);
}

.result-medium {
  background-color: rgba(243, 156, 18, 0.2);
  border: 1px solid var(--medium-color);
  color: var(--medium-color);
}

.result-bad {
  background-color: rgba(231, 76, 60, 0.2);
  border: 1px solid var(--bad-color);
  color: var(--bad-color);
}

.practicality-excellent {
  background-color: rgba(46, 204, 113, 0.2);
  border: 1px solid var(--practicality-excellent);
  color: var(--practicality-excellent);
}

.practicality-acceptable {
  background-color: rgba(243, 156, 18, 0.2);
  border: 1px solid var(--practicality-acceptable);
  color: var(--practicality-acceptable);
}

.practicality-impractical {
  background-color: rgba(231, 76, 60, 0.2);
  border: 1px solid var(--practicality-impractical);
  color: var(--practicality-impractical);
}

/* Chart colors */
.chart-ideal {
  fill: var(--ideal-color);
  background-color: var(--ideal-color);
}

.chart-good {
  fill: var(--good-color);
  background-color: var(--good-color);
}

.chart-medium {
  fill: var(--medium-color);
  background-color: var(--medium-color);
}

.chart-bad {
  fill: var(--bad-color);
  background-color: var(--bad-color);
}

.tab-container {
  margin-top: 20px;
}

.tabs {
  display: flex;
  border-bottom: 1px solid #ddd;
  margin-bottom: 20px;
  position: relative;
  z-index: 10;
}

.main-tabs {
  background: linear-gradient(135deg, #7f9bb8 0%, var(--secondary-color) 100%);
  border-radius: 12px 12px 0 0;
  padding: 15px 15px 0px 15px;
  margin-bottom: 0;
  border-bottom: none;
  display: flex;
  justify-content: space-between;
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.15);
  position: relative;
  overflow: hidden;
}

.main-tabs::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at top right, rgba(255,255,255,0.15) 0%, rgba(255,255,255,0) 70%);
  pointer-events: none;
}

.sub-tabs {
  background: linear-gradient(to bottom, rgba(255,255,255,0.9) 0%, rgba(245,245,245,0.95) 100%);
  padding: 12px 15px 0px 15px;
  border-bottom: 1px solid #e0e0e0;
  margin-bottom: 20px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  position: relative;
  z-index: 5;
}

.tab {
  padding: 16px 28px;
  cursor: pointer;
  border: 2px solid #ddd;
  border-bottom: none;
  border-radius: 8px 8px 0 0;
  margin-right: 8px;
  font-weight: 600;
  font-size: 18px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  box-shadow: 0 -2px 5px rgba(0,0,0,0.05);
}

.main-tab {
  background-color: rgba(255, 255, 255, 0.1);
  border: 2px solid rgba(255, 255, 255, 0.2);
  color: rgba(0, 0, 0, 0.8);
  font-size: 18px;
  padding: 15px 25px;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: all 0.3s ease;
  transform-origin: bottom;
  position: relative;
  overflow: hidden;
}

/* Add colored indicator to inactive tabs */
.main-tab::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background-color: transparent;
}

.main-tab.tab-sample-prep::after {
  background-color: var(--sample-prep-color);
  opacity: 0.5;
}

.main-tab.tab-instrumentation::after {
  background-color: var(--instrumentation-color);
  opacity: 0.5;
}

.main-tab.tab-reagent::after {
  background-color: var(--reagent-color);
  opacity: 0.5;
}

.main-tab.tab-waste::after {
  background-color: var(--waste-color);
  opacity: 0.5;
}

.main-tab.tab-practicality::after {
  background-color: var(--practicality-color);
  opacity: 0.5;
}

.main-tab.tab-results::after {
  background-color: var(--primary-color);
  opacity: 0.5;
}

.main-tab.active {
  background-color: #fff;
  border-color: #fff;
  font-weight: 700;
  transform: scale(1.05);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  z-index: 5;
}

/* Active main tab colors */
.main-tab.tab-sample-prep.active {
  color: var(--sample-prep-color);
}

.main-tab.tab-instrumentation.active {
  color: var(--instrumentation-color);
}

.main-tab.tab-reagent.active {
  color: var(--reagent-color);
}

.main-tab.tab-waste.active {
  color: var(--waste-color);
}

.main-tab.tab-practicality.active {
  color: var(--practicality-color);
}

.main-tab.tab-results.active {
  color: var(--primary-color);
}

.sub-tab {
  font-size: 16px;
  padding: 14px 22px;
}

.tab::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: transparent;
}

.tab:hover {
  background-color: #f9f9f9;
}

.main-tab:hover {
  background-color: rgba(255, 255, 255, 0.25);
}

.tab.active {
  background-color: white;
  border-bottom-color: white;
  margin-bottom: -2px;
  box-shadow: 0 -4px 8px rgba(0, 0, 0, 0.1);
  font-weight: 700;
  /* Remove transform to avoid page shaking */
  animation: tabActivateColor 0.3s ease-out;
}

@keyframes tabActivateColor {
  from {
    background-color: #f8f9fa;
  }
  to {
    background-color: white;
  }
}

/* Component-specific tab styling */
.tab-sample-prep::before {
  background-color: var(--sample-prep-color);
}

.tab-sample-prep.active {
  color: var(--sample-prep-color);
}

.tab-reagent::before {
  background-color: var(--reagent-color);
}

.tab-reagent.active {
  color: var(--reagent-color);
}

.tab-instrumentation::before {
  background-color: var(--instrumentation-color);
}

.tab-instrumentation.active {
  color: var(--instrumentation-color);
}

.tab-waste::before {
  background-color: var(--waste-color);
}

.tab-waste.active {
  color: var(--waste-color);
}

.tab-practicality::before {
  background-color: var(--practicality-color);
}

.tab-practicality.active {
  color: var(--practicality-color);
}

.tab-results.active {
  color: var(--primary-color);
}

.tab-results::before {
  background-color: var(--primary-color);
}

.tab-content {
  display: none;
}

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

.help-text {
  color: #666;
  font-size: 0.9em;
  margin-top: 5px;
}

.chart-container {
  width: 100%;
  height: 400px;
  margin: 20px 0;
}

/* Chart tab styles */
.chart-tabs {
  display: flex;
  border-bottom: 1px solid #ddd;
  margin-bottom: 15px;
}

.chart-tab {
  padding: 8px 16px;
  cursor: pointer;
  margin-right: 5px;
  border: 1px solid #ddd;
  border-bottom: none;
  border-radius: 5px 5px 0 0;
}

.chart-tab.active {
  background-color: var(--secondary-color);
  color: white;
  border-color: var(--secondary-color);
}

/* Legend styles */
.legend-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  margin: 20px 0;
  padding: 10px;
  border: 1px solid #eee;
  border-radius: 5px;
  background-color: #f9f9f9;
}

.legend-item {
  display: flex;
  align-items: center;
  margin: 5px 10px;
}

.legend-color {
  width: 15px;
  height: 15px;
  margin-right: 5px;
  border-radius: 3px;
}

/* Score gauge styles */
.score-gauge {
  position: relative;
  width: 200px;
  height: 100px;
  margin: 0 auto;
}

.gauge-background {
  position: absolute;
  width: 100%;
  height: 20px;
  background-color: #e0e0e0;
  border-radius: 10px;
  top: 50%;
  transform: translateY(-50%);
}

.gauge-indicator {
  position: absolute;
  height: 20px;
  border-radius: 10px;
  top: 50%;
  transform: translateY(-50%);
}

.gauge-label {
  position: absolute;
  top: 80%;
  left: 50%;
  transform: translateX(-50%);
  font-weight: bold;
  font-size: 18px;
}

.score-interpretation {
  margin-top: 15px;
  padding: 10px;
  border-radius: 5px;
  font-weight: bold;
  text-align: center;
}

/* Interpretation tables */
.interpretation-section {
  margin-bottom: 30px;
  background-color: white;
  padding: 20px;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
}

.interpretation-table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid #ddd;
}

.interpretation-table th,
.interpretation-table td {
  padding: 12px 15px;
  text-align: left;
  border: 1px solid #ddd;
}

.interpretation-table th {
  background-color: #f8f9fa;
  font-weight: bold;
}

.interpretation-table tbody tr:hover {
  background-color: rgba(0, 0, 0, 0.02);
}

.color-dot {
  display: inline-block;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  margin-right: 5px;
}

.dark-green {
  background-color: #2E7D32;
}

.light-green {
  background-color: #4CAF50;
}

.yellow {
  background-color: #FFC107;
}

.red {
  background-color: #F44336;
}

.dark-blue {
  background-color: #0D47A1;
}

.light-blue {
  background-color: #2196F3;
}

.magenta {
  background-color: #E91E63;
}

/* Row highlighting for interpretation tables */
.result-ideal-row {
  background-color: rgba(0, 100, 0, 0.1);
}

.result-good-row {
  background-color: rgba(76, 175, 80, 0.1);
}

.result-medium-row {
  background-color: rgba(255, 193, 7, 0.1);
}

.result-bad-row {
  background-color: rgba(244, 67, 54, 0.1);
}

.practicality-excellent-row {
  background-color: rgba(13, 71, 161, 0.1);
}

.practicality-acceptable-row {
  background-color: rgba(33, 150, 243, 0.1);
}

.practicality-impractical-row {
  background-color: rgba(233, 30, 99, 0.1);
}

/* Practicality criteria table styles */
.practicality-criteria-table {
  margin: 25px 0;
  background-color: white;
  padding: 15px;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
}

.criteria-table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid #ddd;
  margin-top: 10px;
}

.criteria-table th,
.criteria-table td {
  padding: 10px 15px;
  text-align: left;
  border: 1px solid #ddd;
}

.criteria-table th {
  background-color: var(--practicality-color);
  color: white;
  font-weight: bold;
}

.criteria-table tr:nth-child(even) {
  background-color: rgba(0, 0, 0, 0.02);
}

.criteria-table tr:hover {
  background-color: rgba(0, 0, 0, 0.05);
}

.calculation-list {
  list-style: none;
  padding: 0;
}

.calculation-item {
  padding: 10px 15px;
  border: 1px solid #ddd;
  border-radius: var(--border-radius);
  margin-bottom: 10px;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.calculation-item:hover {
  background-color: #f5f5f5;
}

.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.modal-content {
  background-color: white;
  padding: 20px;
  border-radius: var(--border-radius);
  max-width: 80%;
  max-height: 80%;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 15px;
}

.modal-header h3 {
  margin: 0;
}

.close-btn {
  background: none;
  border: none;
  font-size: 1.5em;
  cursor: pointer;
}

.hidden {
  display: none;
}

/* Language Selector Styles */
.language-selector {
  display: flex;
  align-items: center;
  gap: 12px;
  background: linear-gradient(135deg, rgba(255,255,255,0.4) 0%, rgba(255,255,255,0.2) 100%);
  border-radius: 8px;
  padding: 8px 14px;
  margin-left: 15px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  transition: all 0.3s ease;
  border: 1px solid rgba(255, 255, 255, 0.3);
  position: relative;
  overflow: hidden;
}

.language-selector:hover {
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
  transform: translateY(-2px);
}

.language-selector::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: all 0.5s ease;
}

.language-selector:hover::before {
  left: 100%;
}

.language-label {
  font-size: 16px;
  color: white;
  font-weight: bold;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
  transition: all 0.3s ease;
}

.language-selector:hover .language-label {
  transform: scale(1.05);
}

.language-select {
  background-color: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 6px;
  padding: 6px 12px;
  font-size: 14px;
  cursor: pointer;
  outline: none;
  color: var(--primary-color);
  transition: all 0.3s ease;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.language-select:hover {
  border-color: white;
  background-color: white;
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.language-select:focus {
  border-color: white;
  box-shadow: 0 0 0 0.2rem rgba(255, 255, 255, 0.25), 0 4px 8px rgba(0, 0, 0, 0.15);
  background-color: white;
}

/* Visualization Components Styles */
.dual-histogram-container {
  background-color: white;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  padding: 20px;
  margin: 30px 0;
}

.histogram-chart-container {
  border: 1px solid #eee;
  border-radius: 5px;
  padding: 20px;
  background-color: #f9f9f9;
  position: relative;
}

.histogram-column {
  transition: height 1s ease-out;
  position: relative;
}

.sirw-column.chart-ideal {
  background-color: #2E7D32;
  background-image: linear-gradient(to bottom, #2E7D32, #008000);
}

.sirw-column.chart-good {
  background-color: #4CAF50;
  background-image: linear-gradient(to bottom, #4CAF50, #8BC34A);
}

.sirw-column.chart-medium {
  background-color: #FFC107;
  background-image: linear-gradient(to bottom, #FFC107, #FFD54F);
}

.sirw-column.chart-bad {
  background-color: #F44336;
  background-image: linear-gradient(to bottom, #F44336, #FF7043);
}

.practicality-column.practicality-excellent-column {
  background-color: #0D47A1;
  background-image: linear-gradient(to bottom, #0D47A1, #1976D2);
}

.practicality-column.practicality-acceptable-column {
  background-color: #2196F3;
  background-image: linear-gradient(to bottom, #2196F3, #64B5F6);
}

.practicality-column.practicality-impractical-column {
  background-color: #E91E63;
  background-image: linear-gradient(to bottom, #E91E63, #F06292);
}

.column-label, .column-score {
  color: white;
  text-shadow: 0 1px 2px rgba(0,0,0,0.5);
}

.column-score {
  font-size: 18px;
}

.histogram-legend {
  background-color: #f8f9fa;
  border-radius: 5px;
  padding: 15px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.legend-title {
  color: #555;
}

.radar-chart-container {
  background-color: white;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  padding: 20px;
  margin: 30px 0;
}

.radar-legend {
  background-color: #f8f9fa;
  border-radius: 5px;
  padding: 15px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

@media (max-width: 768px) {
  .dual-histogram-container, 
  .radar-chart-container {
    padding: 15px;
    margin: 20px 0;
  }
  
  .histogram-column {
    width: 60px !important;
  }
  
  .histogram-chart-container {
    padding: 10px;
  }
}

.reagents-container {
  margin-bottom: 20px;
}

.reagent-item {
  margin-bottom: 20px;
  padding: 20px;
  border: 1px solid #e0e0e0;
  border-radius: var(--border-radius);
  background-color: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.reagent-item h4 {
  margin-top: 0;
  margin-bottom: 20px;
  color: var(--reagent-color);
  font-size: 20px;
  border-bottom: 1px solid #f0f0f0;
  padding-bottom: 10px;
}

.reagent-form-group {
  margin-bottom: 16px;
}

.reagent-form-label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: #555;
}

.reagent-field-with-help {
  display: flex;
  align-items: center;
}

.reagent-help-icon {
  margin-left: 8px;
  color: #999;
  cursor: help;
}

.remove-btn {
  margin-left: 10px;
  background: none;
  border: none;
  color: var(--danger-color);
  cursor: pointer;
  font-size: 1.2em;
}

.add-solvent-container {
  background-color: #fff;
  border: 2px dashed #ddd;
  border-radius: var(--border-radius);
  padding: 30px;
  margin-top: 20px;
  margin-bottom: 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
}

.add-solvent-container:hover {
  border-color: var(--secondary-color);
  background-color: rgba(52, 152, 219, 0.05);
}

.add-solvent-title {
  font-size: 22px;
  font-weight: bold;
  margin-bottom: 10px;
  color: #333;
}

/* Results page specific styling */
.results-header {
  text-align: center;
  margin-bottom: 30px;
}

.dual-score-wrapper {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 20px;
}

.score-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  background: white;
}

.ei-index-container {
  border-top: 4px solid var(--secondary-color);
}

.practicality-index-container {
  border-top: 4px solid var(--practicality-color);
}

.score-value {
  font-size: 36px;
  font-weight: bold;
  margin: 10px 0;
}

.weight-info {
  font-size: 14px;
  color: #777;
  margin-top: 5px;
}

.total-score-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 30px;
  padding: 20px;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  background: white;
}

.total-score-value {
  font-size: 36px;
  font-weight: bold;
  margin: 10px 0;
}

.score-description {
  font-size: 18px;
  color: #555;
  margin-bottom: 10px;
  text-align: center;
}

.component-scores-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.component-score-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px;
  border-radius: var(--border-radius);
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  position: relative;
  overflow: hidden;
  background: white;
  border-top: 3px solid transparent;
  transition: transform 0.2s ease;
}

.component-score-card:hover {
  transform: translateY(-5px);
}

.component-score-card.sample-prep {
  border-top-color: var(--sample-prep-color);
}

.component-score-card.reagent {
  border-top-color: var(--reagent-color);
}

.component-score-card.instrumentation {
  border-top-color: var(--instrumentation-color);
}

.component-score-card.waste {
  border-top-color: var(--waste-color);
}

.component-icon {
  font-size: 24px;
  margin-bottom: 10px;
}

.component-name {
  font-size: 18px;
  font-weight: bold;
  margin-bottom: 5px;
}

.component-score {
  font-size: 24px;
  font-weight: bold;
  color: #333;
  margin: 10px 0;
}

.component-description {
  text-align: center;
  color: #666;
  font-size: 14px;
  margin-top: 10px;
}

.improvement-suggestion {
  background-color: #f8f9fa;
  padding: 15px;
  margin-top: 20px;
  border-radius: var(--border-radius);
  border-left: 4px solid var(--secondary-color);
}

.improvement-suggestion h3 {
  margin-top: 0;
  color: var(--secondary-color);
  font-size: 18px;
}

.component-comparison {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 15px 0;
  padding: 10px;
  background-color: #f8f9fa;
  border-radius: var(--border-radius);
}

.highest-component, .lowest-component {
  font-weight: bold;
}

/* Templates styles */
.templates-container {
  padding: 15px;
}

.template-description {
  margin-bottom: 25px;
  color: var(--dark-color);
}

.template-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.template-card {
  background-color: white;
  border-radius: 8px;
  box-shadow: 0 3px 6px rgba(0,0,0,0.1);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid #e0e0e0;
}

.template-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

.template-card-header {
  padding: 15px;
  background-color: var(--primary-color);
  color: white;
  border-bottom: 1px solid #e0e0e0;
}

.template-card-header h3 {
  margin: 0;
  font-size: 1.1rem;
}

.template-card-body {
  padding: 15px;
  flex-grow: 1;
}

.template-card-body p {
  margin-top: 0;
  color: var(--dark-color);
  font-size: 0.9rem;
}

.template-characteristics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 15px;
}

.characteristic-item {
  font-size: 0.85rem;
  padding: 5px;
  border-radius: 4px;
  background-color: #f8f9fa;
}

.template-card-footer {
  padding: 15px;
  border-top: 1px solid #e0e0e0;
  display: flex;
  justify-content: flex-end;
}

.new-template-card .template-card-header {
  background-color: var(--success-color);
}

.new-template-form {
  margin-top: 15px;
}

.new-template-form .form-group {
  margin-bottom: 15px;
}

.new-template-form label {
  display: block;
  margin-bottom: 5px;
  font-weight: bold;
  font-size: 0.9rem;
}

.new-template-form input,
.new-template-form textarea {
  width: 100%;
  padding: 8px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 0.9rem;
}

/* Animation classes */
.fade-in {
  animation: fadeIn 0.8s ease-out;
}

.slide-in-right {
  animation: slideInRight 0.5s forwards;
}

.slide-in-left {
  animation: slideInLeft 0.5s forwards;
}

.zoom-in {
  animation: zoomIn 0.5s forwards;
}

.pulse {
  animation: pulse 2s infinite;
}

.bounce {
  animation: bounce 1s;
}

/* Animation Keyframes */
@keyframes slideInRight {
  from {
    transform: translateX(30px);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes slideInLeft {
  from {
    transform: translateX(-30px);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes zoomIn {
  from {
    transform: scale(0.8);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes pulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
  100% {
    transform: scale(1);
  }
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-10px);
  }
  60% {
    transform: translateY(-5px);
  }
}

/* Responsive design for mobile devices */
@media (max-width: 768px) {
  body {
    font-size: 16px;
  }
  
  .container {
    padding: 15px;
  }
  
  .tabs {
    flex-wrap: wrap;
  }
  
  .tab {
    padding: 10px 15px;
    margin-bottom: 5px;
    font-size: 14px;
    flex-grow: 1;
    text-align: center;
  }
  
  .btn {
    width: 100%;
    margin-bottom: 10px;
    padding: 12px 16px;
  }
  
  .form-group label {
    font-size: 1rem;
  }
  
  .form-control {
    font-size: 16px;
    padding: 12px 14px;
  }
  
  .dual-score-wrapper {
    flex-direction: column;
    gap: 15px;
  }
  
  .component-scores-container {
    grid-template-columns: 1fr;
  }
  
  .radio-option {
    padding: 8px 0;
  }
  
  .radio-option label {
    font-size: 15px;
  }

  /* Improve touch targets for mobile */
  input[type="radio"], input[type="checkbox"] {
    transform: scale(1.2);
    margin-right: 8px;
  }
}

/* Extra animations for specific elements */
.card, .component-score-card, .reagent-item {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover, .component-score-card:hover, .reagent-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 15px rgba(0,0,0,0.1);
}

/* More subtle element animations */
.form-section h3, .info-card-title, .component-name {
  position: relative;
  overflow: hidden;
}

.form-section h3::after, .info-card-title::after, .component-name::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: currentColor;
  transition: width 0.5s ease;
}

/* .form-section h3:hover::after, .info-card-title:hover::after, .component-name:hover::after {
  width: 100%;
} */

.info-card-title.collapsible-title:hover::after {
  width: 100%;
}


/* Information cards for form sections */
.info-card {
  margin-bottom: 30px;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.08);
  transition: all 0.3s ease;
  animation: fadeIn 0.5s ease-out;
}

.info-card:hover {
  box-shadow: 0 6px 15px rgba(0,0,0,0.1);
  transform: translateY(-3px);
}

.info-card-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(0,0,0,0.1);
}

.info-card-content {
  font-size: 1.1rem;
  line-height: 1.6;
  color: #444;
}

.info-card-content ol, 
.info-card-content ul {
  padding-left: 25px;
  margin: 15px 0;
}

.info-card-content li {
  margin-bottom: 8px;
}

.info-card-content p {
  margin-bottom: 15px;
}

/* Color variations for info cards */
.info-card-sample-prep {
  background-color: #f0f8f0;
  border-left: 5px solid var(--sample-prep-color);
}

.info-card-reagent {
  background-color: #fff4f5;
  border-left: 5px solid var(--reagent-color);
}

.info-card-instrumentation {
  background-color: #fffaf0;
  border-left: 5px solid var(--instrumentation-color);
}

.info-card-waste {
  background-color: #f0f7ff;
  border-left: 5px solid var(--waste-color);
}

/* Tab transition animations */
.fade-in {
  animation: fadeIn 0.5s forwards;
}

.fade-out {
  animation: fadeOut 0.3s forwards;
}

.slide-in-left {
  animation: slideInLeft 0.5s forwards;
}

.slide-in-right {
  animation: slideInRight 0.5s forwards;
}

.tab-pulse {
  animation: tabPulse 0.5s;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes fadeOut {
  from {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes tabPulse {
  0% {
    transform: scale(1);
    box-shadow: 0 0 0 rgba(0,0,0,0.1);
  }
  50% {
    transform: scale(1.05);
    box-shadow: 0 0 10px rgba(0,0,0,0.2);
  }
  100% {
    transform: scale(1);
    box-shadow: 0 0 0 rgba(0,0,0,0.1);
  }
}

/* Tab transition overlay */
.tab-transition-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.8);
  z-index: 1000;
  opacity: 0;
  transition: opacity 0.3s ease;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Tab icon styling */
.tab-icon {
  display: inline-block;
  margin-right: 8px;
  vertical-align: middle;
}

.tab-icon svg {
  width: 18px;
  height: 18px;
  vertical-align: middle;
}

.tab-label {
  vertical-align: middle;
}

.main-tab .tab-icon svg {
  width: 20px;
  height: 20px;
}

.sub-tab .tab-icon svg {
  width: 16px;
  height: 16px;
}

.main-tab.active .tab-icon svg {
  stroke-width: 2.5;
}

.sub-tab.active .tab-icon svg {
  stroke-width: 2.5;
}

/* Footer layout */
.app-footer {
  background: #0f172a;      /* deep slate */
  color: #f1f5f9;           /* off‑white */
  padding: 2rem 0;
  font-size: 0.9rem;
}

/* Keep content centred and responsive */
.app-footer .container {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

/* Space out the paragraphs slightly */
.app-footer p {
  margin: 0.4rem 0;
}

/* Developer credit link */
.developer-credit a {
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, opacity 0.2s ease;
}

.developer-credit a:hover,
.developer-credit a:focus {
  border-color: currentColor;
  opacity: 0.8;
}

.radar-chart text {
  white-space: pre-line;
}

.score-card {transition:transform .2s ease;}
.score-card:hover {transform:translateY(-3px);}