/* ============================================
   CSS CUSTOM PROPERTIES
   ============================================ */

:root {
  /* Eco-friendly Color Palette */
  --primary: #10b981;
  --secondary: #059669;
  --accent: #34d399;
  --danger: #ef4444;
  --warning: #f59e0b;
  --info: #3b82f6;

  /* Semantic Colors for Emissions */
  --emission-low: #10b981;      /* Green - Low emissions */
  --emission-medium: #f59e0b;   /* Orange - Medium emissions */
  --emission-high: #ef4444;     /* Red - High emissions */

  /* Text & Background */
  --text: #1f2937;
  --text-light: #6b7280;
  --text-lighter: #9ca3af;
  --bg: #f3f4f6;
  --white: #ffffff;
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.2);

  /* Spacing Scale */
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;

  /* Border Radius */
  --radius: 0.75rem;
  --radius-lg: 1.25rem;
  --radius-xl: 1.75rem;

  /* Shadows - Glassmorphism Style */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.15);
  --shadow-xl: 0 20px 48px rgba(0, 0, 0, 0.18);
  --shadow-glass: 0 8px 32px rgba(16, 185, 129, 0.15);

  /* Transitions */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   BASE STYLES
   ============================================ */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: linear-gradient(135deg, #d4fc79 0%, #96e6a1 100%);
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto',
    'Oxygen', 'Ubuntu', 'Cantarell', 'Inter', 'Montserrat', sans-serif;
  color: var(--text);
  line-height: 1.6;
  font-weight: 500;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-md);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.hidden {
  display: none !important;
}

.section-title {
  font-size: clamp(1.5rem, 5vw, 2.25rem);
  font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

/* Visual Indicators */
.indicator {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 600;
  backdrop-filter: blur(10px);
}

/* ============================================
   HEADER
   ============================================ */

.header {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--shadow-glass);
  padding: var(--spacing-xl) var(--spacing-md);
  margin-bottom: var(--spacing-2xl);
  position: sticky;
  top: 0;
  z-index: 100;
  animation: slideDown 0.5s var(--transition);
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.header__title {
  font-size: clamp(1.75rem, 6vw, 2.5rem);
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.02em;
}

.header__subtitle {
  color: var(--text-light);
  font-size: clamp(0.95rem, 3vw, 1.1rem);
  line-height: 1.6;
  font-weight: 400;
}

/* ============================================
   MAIN CONTENT
   ============================================ */

.main {
  padding: 0 var(--spacing-md) var(--spacing-2xl);
}

/* ============================================
   FORM STYLING
   ============================================ */

.calculator-form {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-xl);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  animation: fadeInUp 0.5s var(--transition);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (min-width: 768px) {
  .calculator-form {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .calculator-form {
    grid-template-columns: repeat(3, 1fr);
  }
}

.calculator-form__group {
  display: flex;
  flex-direction: column;
}

.calculator-form__group--checkbox {
  grid-column: 1 / -1;
  margin-bottom: var(--spacing-md);
}

.calculator-form__label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text);
  font-size: 0.95rem;
  letter-spacing: -0.01em;
}

.calculator-form__input {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-md);
  border: 2px solid var(--glass-border);
  border-radius: var(--radius-lg);
  font-size: 1rem;
  transition: var(--transition);
  font-family: inherit;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(5px);
  min-height: 3rem;
  font-weight: 500;
}

.calculator-form__input::placeholder {
  color: var(--text-lighter);
}

.calculator-form__input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.15);
  background: var(--white);
  transform: translateY(-2px);
}

.calculator-form__input:disabled,
.calculator-form__input[readonly] {
  background-color: var(--bg);
  color: var(--text-light);
  cursor: not-allowed;
  opacity: 0.6;
}

.calculator-form__helper-text {
  font-size: 0.8rem;
  color: var(--text-light);
  margin-top: var(--spacing-xs);
  transition: var(--transition-fast);
  font-weight: 400;
}

.calculator-form__checkbox-label {
  display: flex;
  align-items: center;
  cursor: pointer;
  font-weight: 500;
  color: var(--text);
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius);
  transition: var(--transition-fast);
}

.calculator-form__checkbox-label:hover {
  background: rgba(16, 185, 129, 0.08);
}

.calculator-form__checkbox {
  width: 1.25rem;
  height: 1.25rem;
  cursor: pointer;
  accent-color: var(--primary);
  flex-shrink: 0;
  min-height: 44px;
  min-width: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ============================================
   FIELDSET & LEGEND
   ============================================ */

.calculator-form__fieldset {
  border: none;
  padding: 0;
  margin-bottom: var(--spacing-lg);
  grid-column: 1 / -1;
}

.calculator-form__legend {
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: var(--spacing-md);
  color: var(--text);
  padding: 0;
  letter-spacing: -0.01em;
}

/* ============================================
   TRANSPORT MODE GRID - ACTIVE SELECTION CARDS
   ============================================ */

.calculator-form__transport-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

@media (min-width: 640px) {
  .calculator-form__transport-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
  }
}

.calculator-form__transport-option {
  position: relative;
  cursor: pointer;
}

.calculator-form__radio {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.calculator-form__transport-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg);
  border: 3px solid var(--glass-border);
  border-radius: var(--radius-lg);
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  gap: var(--spacing-md);
  font-weight: 600;
  color: var(--text);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(5px);
  min-height: 140px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  font-size: 0.95rem;
  min-height: 44px;
  min-width: 44px;
}

.calculator-form__transport-label::before {
  font-size: 2.5rem;
  display: block;
  line-height: 1;
  transition: var(--transition-fast);
}

/* Hover State - Lift and highlight */
.calculator-form__radio:hover + .calculator-form__transport-label {
  transform: translateY(-4px) scale(1.05);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
  background: rgba(16, 185, 129, 0.08);
}

/* Checked State - Active selection with visual prominence */
.calculator-form__radio:checked + .calculator-form__transport-label {
  border-color: var(--primary);
  border-width: 3px;
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(52, 211, 153, 0.1));
  color: var(--primary);
  box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.2), var(--shadow-md);
  font-weight: 700;
}

.calculator-form__radio:checked + .calculator-form__transport-label::before {
  transform: scale(1.15);
  animation: popIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes popIn {
  0% {
    transform: scale(0.8);
  }
  100% {
    transform: scale(1.15);
  }
}

/* ============================================
   BUTTON
   ============================================ */

.calculator-form__button {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: var(--white);
  border: none;
  border-radius: var(--radius-lg);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  margin-top: var(--spacing-lg);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  grid-column: 1 / -1;
  min-height: 3rem;
  position: relative;
  overflow: hidden;
  box-shadow: 0 8px 20px rgba(16, 185, 129, 0.3);
  font-size: clamp(0.95rem, 2vw, 1.1rem);
}

.calculator-form__button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.5s;
}

.calculator-form__button:hover {
  background: linear-gradient(135deg, var(--secondary), var(--primary));
  box-shadow: 0 12px 28px rgba(16, 185, 129, 0.4);
  transform: translateY(-2px);
}

.calculator-form__button:hover::before {
  left: 100%;
}

.calculator-form__button:active {
  transform: translateY(0);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.calculator-form__button:disabled {
  background: var(--text-lighter);
  cursor: not-allowed;
  opacity: 0.5;
  box-shadow: none;
}

/* ============================================
   RESULTS SECTIONS - DASHBOARD STYLE
   ============================================ */

.results,
.comparison,
.carbon-credits {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
  animation: slideIn 0.4s var(--transition);
  scroll-margin-top: var(--spacing-xl);
}

.results__content,
.comparison__content,
.carbon-credits__content {
  min-height: auto;
}

/* Results Cards Grid */
.results__content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

.results-card {
  background: rgba(255, 255, 255, 0.95);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  border: 1px solid rgba(16, 185, 129, 0.2);
  transition: var(--transition);
  overflow: hidden;
  position: relative;
}

.results-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}

.results-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.results-card__header {
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.results-card__title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0;
}

.results-card__content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.results-card__value {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  letter-spacing: -0.02em;
}

.results-card__subtitle {
  font-size: 0.85rem;
  color: var(--text-light);
  font-weight: 500;
  margin: 0;
}

.results-card__text {
  font-size: 1rem;
  color: var(--text);
  font-weight: 500;
  margin: var(--spacing-xs) 0;
}

.results-card__arrow {
  font-size: 1.5rem;
  color: var(--primary);
  text-align: center;
  margin: var(--spacing-xs) 0;
}

.results-card__transport {
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: var(--spacing-md);
}

.results-card__icon {
  font-size: 3rem;
  line-height: 1;
  margin: 0;
}

.results-card--savings {
  border-left: 4px solid var(--emission-low);
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.05), rgba(52, 211, 153, 0.05));
}

.results-card--savings::before {
  background: linear-gradient(90deg, var(--emission-low), var(--accent));
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--glass-border);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-lg);
  text-align: center;
  margin-top: var(--spacing-2xl);
}

.footer__text {
  color: var(--text-light);
  font-size: 0.95rem;
  font-weight: 500;
}

/* ============================================
   COMPARISON SECTION - COLOR CODED INDICATORS
   ============================================ */

/* Comparison Items */
.comparison-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.comparison-item {
  background: rgba(255, 255, 255, 0.95);
  border: 2px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: var(--transition);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.comparison-item:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
}

.comparison-item--selected {
  border-color: var(--primary);
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(52, 211, 153, 0.05));
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
}

.comparison-item__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
}

.comparison-item__mode {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-weight: 700;
  color: var(--text);
  font-size: 1.1rem;
}

.comparison-item__icon {
  font-size: 2rem;
  display: block;
}

.comparison-item__label {
  font-weight: 700;
  color: var(--text);
}

.comparison-item__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--emission-low);
  color: var(--white);
  border-radius: var(--radius);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  animation: slideIn 0.3s var(--transition);
}

.comparison-item__stats {
  margin-bottom: var(--spacing-md);
}

.comparison-item__emission {
  font-size: 1.25rem;
  color: var(--text);
  margin-bottom: var(--spacing-xs);
  font-weight: 700;
}

.comparison-item__percentage {
  font-size: 0.9rem;
  color: var(--text-light);
  font-weight: 600;
}

/* Progress Bar with Color Coding */
.comparison-item__bar-container {
  width: 100%;
  height: 8px;
  background: var(--bg);
  border-radius: 4px;
  overflow: hidden;
  position: relative;
}

.comparison-item__bar {
  height: 100%;
  border-radius: 4px;
  transition: width 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 0 12px rgba(16, 185, 129, 0.3);
}

/* Comparison Tip Box */
.comparison-tip {
  background: linear-gradient(135deg, rgba(52, 211, 153, 0.1), rgba(16, 185, 129, 0.05));
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.comparison-tip__text {
  font-size: 0.95rem;
  color: var(--text);
  font-weight: 500;
  margin: 0;
  line-height: 1.6;
}

/* ============================================
   CARBON CREDITS SECTION
   ============================================ */

.carbon-credits-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.carbon-credits-card {
  background: rgba(255, 255, 255, 0.95);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  border: 1px solid rgba(16, 185, 129, 0.2);
  transition: var(--transition);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.carbon-credits-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}

.carbon-credits-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.carbon-credits-card__header {
  margin-bottom: var(--spacing-md);
}

.carbon-credits-card__title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0;
}

.carbon-credits-card__content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.carbon-credits-card__value {
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  letter-spacing: -0.02em;
}

.carbon-credits-card__range {
  font-size: 0.9rem;
  color: var(--text-light);
  font-weight: 500;
  margin: 0;
}

.carbon-credits-card__helper {
  font-size: 0.85rem;
  color: var(--text-lighter);
  font-weight: 400;
  margin: 0;
  line-height: 1.5;
}

/* Info Box */
.carbon-credits-info {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), rgba(34, 197, 94, 0.08));
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-left: 4px solid var(--info);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.carbon-credits-info__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: var(--spacing-sm);
}

.carbon-credits-info__text {
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 1.6;
  margin: 0;
  font-weight: 500;
}

/* Carbon Credits Button */
.carbon-credits-button {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: var(--white);
  border: none;
  border-radius: var(--radius-lg);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  min-height: 3rem;
  position: relative;
  overflow: hidden;
  box-shadow: 0 8px 20px rgba(16, 185, 129, 0.3);
}

.carbon-credits-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.5s;
}

.carbon-credits-button:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--secondary), var(--accent));
  box-shadow: 0 12px 28px rgba(16, 185, 129, 0.4);
  transform: translateY(-2px);
}

.carbon-credits-button:hover:not(:disabled)::before {
  left: 100%;
}

.carbon-credits-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ============================================
   SPINNER / LOADING ANIMATION
   ============================================ */

.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid var(--glass-border);
  border-top-color: var(--white);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-right: var(--spacing-sm);
  vertical-align: middle;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ============================================
   RESPONSIVE ADJUSTMENTS - MOBILE FIRST
   ============================================ */

/* Mobile View (default) */
@media (max-width: 640px) {
  .header {
    padding: var(--spacing-lg) var(--spacing-md);
    margin-bottom: var(--spacing-lg);
  }

  .header__title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
  }

  .header__subtitle {
    font-size: 0.9rem;
  }

  .calculator-form {
    padding: var(--spacing-lg);
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .calculator-form__group {
    margin-bottom: 0;
  }

  .calculator-form__fieldset {
    margin-bottom: 0;
  }

  .calculator-form__input {
    font-size: 16px; /* Prevents zoom on iOS */
    min-height: 44px;
  }

  .calculator-form__label {
    font-size: 0.9rem;
  }

  .calculator-form__transport-grid {
    gap: var(--spacing-sm);
  }

  .calculator-form__transport-label {
    padding: var(--spacing-md);
    min-height: 120px;
  }

  .calculator-form__transport-label::before {
    font-size: 2rem;
  }

  .calculator-form__button {
    margin-top: var(--spacing-md);
    font-size: 1rem;
    min-height: 48px;
  }

  .results,
  .comparison,
  .carbon-credits {
    padding: var(--spacing-lg);
    margin-top: var(--spacing-lg);
  }

  .results__content {
    grid-template-columns: 1fr;
  }

  .results-card {
    padding: var(--spacing-md);
  }

  .results-card__value {
    font-size: 1.5rem;
  }

  .comparison-item {
    padding: var(--spacing-md);
  }

  .carbon-credits-container {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .carbon-credits-card {
    padding: var(--spacing-md);
  }

  .carbon-credits-info {
    padding: var(--spacing-md);
  }

  .footer {
    padding: var(--spacing-md);
    margin-top: var(--spacing-lg);
  }

  .footer__text {
    font-size: 0.85rem;
  }
}

/* Tablet View (640px and up) */
@media (min-width: 641px) and (max-width: 1023px) {
  .calculator-form {
    grid-template-columns: repeat(2, 1fr);
  }

  .calculator-form__fieldset {
    grid-column: 1 / -1;
  }

  .calculator-form__button {
    grid-column: 1 / -1;
  }

  .results__content {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Desktop View (1024px and up) */
@media (min-width: 1024px) {
  .calculator-form {
    grid-template-columns: repeat(3, 1fr);
  }

  .results__content {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
}