:root {
  --primary-color: #FF7023;
  --primary-hover: #E5611E;
  --secondary-color: #64748b;
  --success-color: #059669;
  --warning-color: #d97706;
  --error-color: #dc2626;
  --pure-color: #FF7023;
  --competitor-color: #6366f1;

  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-card: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --border-color: #e2e8f0;
  --shadow-color: rgba(0, 0, 0, 0.1);

  --header-height: 70px;
  --border-radius: 12px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
}

[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: #334155;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --border-color: #475569;
  --shadow-color: rgba(0, 0, 0, 0.3);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== CONTAINER ===== */
.container {
  width: 100%;
  margin: 0 auto;
  padding: 0 clamp(1rem, 3vw, 3rem);
}

/* ===== HEADER ===== */
.header {
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  height: var(--header-height);
  display: flex;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 3px var(--shadow-color);
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
}

.theme-toggle {
  background: none;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: var(--spacing-xs);
  cursor: pointer;
  font-size: 1.2rem;
  transition: all 0.3s ease;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.theme-toggle:hover {
  background-color: var(--bg-secondary);
  transform: scale(1.05);
}

/* ===== MAIN ===== */
.main {
  flex: 1;
  padding: var(--spacing-lg) 0;
}

/* ===== HERO ===== */
.hero {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.hero h2 {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.hero p {
  font-size: clamp(0.9rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  max-width: min(600px, 100%);
  margin: 0 auto;
}

/* ===== CALCULATOR GRID ===== */
.calculator-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

/* ===== CARDS ===== */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  box-shadow: 0 4px 6px var(--shadow-color);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--shadow-color);
}

.card h3 {
  font-size: clamp(1.1rem, 2.5vw, 1.3rem);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
  border-bottom: 2px solid var(--primary-color);
  padding-bottom: var(--spacing-xs);
}

/* ===== FORMS ===== */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
  color: var(--text-primary);
  font-size: clamp(0.85rem, 2vw, 1rem);
}

.form-group input {
  width: 100%;
  padding: var(--spacing-sm);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 1rem;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

select {
  width: 100%;
  padding: var(--spacing-sm);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 1rem;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(255, 107, 0, 0.1);
}

/* ===== TCO COMPARISON RESULTS ===== */
.results-section {
  background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-secondary) 100%);
  overflow: hidden;
}

.comparison-results {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.result-column {
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  background-color: var(--bg-secondary);
  overflow: hidden;
}

.pure-results {
  border-left: 4px solid var(--pure-color);
}

.competitor-results {
  border-left: 4px solid var(--competitor-color);
}

.result-column h4 {
  margin-bottom: var(--spacing-sm);
  font-size: clamp(0.9rem, 2vw, 1.1rem);
  word-wrap: break-word;
}

.pure-results h4 {
  color: var(--pure-color);
}

.competitor-results h4 {
  color: var(--competitor-color);
}

.result-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-xs) 0;
  border-bottom: 1px solid var(--border-color);
  gap: var(--spacing-xs);
  flex-wrap: wrap;
}

.result-item:last-of-type {
  border-bottom: none;
}

.result-item.highlight {
  background-color: var(--primary-color);
  color: white;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: clamp(0.85rem, 2vw, 1.1rem);
  border-bottom: none;
  flex-wrap: wrap;
}

.result-label {
  font-weight: 500;
  font-size: clamp(0.8rem, 1.8vw, 1rem);
}

.result-value {
  font-weight: 700;
  font-size: clamp(0.9rem, 2vw, 1.1rem);
  color: var(--success-color);
  word-break: break-word;
  text-align: right;
}

.result-item.highlight .result-value {
  color: white;
}

.result-item.highlight .result-label {
  color: white;
}

.savings-result {
  text-align: center;
  padding: var(--spacing-md);
  background: linear-gradient(135deg, var(--success-color), #047857);
  border-radius: var(--border-radius);
  color: white;
  overflow: hidden;
}

.savings-note {
  margin-top: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: rgba(220, 38, 38, 0.1);
  border: 1px solid var(--error-color);
  border-radius: var(--border-radius);
  color: var(--error-color);
  font-size: 0.85rem;
  line-height: 1.4;
}

/* ===== CHART SECTION ===== */
.chart-full-width {
  grid-column: 1 / -1;
  margin-top: var(--spacing-lg);
}

.chart-container {
  margin-top: var(--spacing-md);
}

.yearly-chart {
  margin: var(--spacing-lg) 0;
}

.horizontal-chart {
  background-color: var(--bg-secondary);
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.chart-years-header {
  display: flex;
  margin-bottom: var(--spacing-sm);
  align-items: center;
}

.chart-axis-space {
  width: 55px;
  flex-shrink: 0;
}

.chart-legend-space {
  width: 120px;
  flex-shrink: 0;
}

.year-header {
  flex: 1;
  text-align: center;
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.9rem;
  padding: var(--spacing-xs);
  min-width: 70px;
}

.chart-row {
  display: flex;
  align-items: flex-end;
  margin-bottom: var(--spacing-md);
  height: 120px;
  position: relative;
}

.chart-divider {
  width: 100%;
  height: 1px;
  background: var(--border-color);
  margin: var(--spacing-sm) 0;
}

.row-label {
  width: 120px;
  font-weight: 600;
  font-size: 0.9rem;
  padding-right: var(--spacing-sm);
  flex-shrink: 0;
  display: flex;
  align-items: flex-end;
  padding-bottom: var(--spacing-sm);
}

.pure-label {
  color: var(--pure-color);
}

.competitor-label {
  color: var(--competitor-color);
}

.bar-cell {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  height: 100%;
  min-width: 70px;
  padding: 0 var(--spacing-xs);
  position: relative;
  z-index: 1;
}

.vertical-bar {
  width: 100%;
  max-width: 60px;
  min-height: 4px;
  border-radius: var(--border-radius) var(--border-radius) 0 0;
  transition: all 0.3s ease;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  position: relative;
  cursor: pointer;
}

.vertical-bar:hover {
  opacity: 0.8;
  transform: translateY(-2px);
}

.vertical-bar.pure-bar {
  background: linear-gradient(180deg, var(--pure-color), #E5611E);
}

.vertical-bar.competitor-bar {
  background: linear-gradient(180deg, var(--competitor-color), #4f46e5);
}

.bar-amount {
  color: white;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 2px;
  text-align: center;
  line-height: 1;
  margin-bottom: 2px;
}

.bar-details {
  margin-top: var(--spacing-xs);
  text-align: center;
  min-height: 20px;
}

/* Y-axis and gridlines */
.chart-y-axis {
  width: 55px;
  flex-shrink: 0;
  position: relative;
  height: 100%;
}

.y-axis-label {
  position: absolute;
  right: 6px;
  transform: translateY(50%);
  font-size: 0.65rem;
  color: var(--text-secondary);
  white-space: nowrap;
  line-height: 1;
}

.chart-gridlines {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  pointer-events: none;
  z-index: 0;
}

.chart-gridline {
  position: absolute;
  left: 175px;
  right: 0;
  height: 1px;
  background-color: var(--border-color);
  opacity: 0.5;
}

.chart-legend-yearly {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.legend-color {
  width: 16px;
  height: 16px;
  border-radius: 4px;
}

.legend-color.pure-legend {
  background: var(--pure-color);
}

.legend-color.competitor-legend {
  background: var(--competitor-color);
}

.refresh-indicator {
  background-color: var(--warning-color);
  color: white;
  padding: 2px 6px;
  border-radius: 12px;
  font-size: 0.6rem;
  font-weight: 600;
  margin-left: var(--spacing-xs);
}

/* Legacy chart styles (unused but kept for safety) */
.chart-bar {
  height: 60px;
  background-color: var(--bg-secondary);
  border-radius: var(--border-radius);
  display: flex;
  overflow: hidden;
  margin-bottom: var(--spacing-md);
}

.bar-segment {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  font-size: 0.9rem;
  transition: width 0.8s ease;
  min-width: 20px;
}

.bar-segment.initial {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
}

.bar-segment.ongoing {
  background: linear-gradient(135deg, var(--success-color), #047857);
}

.bar-label {
  opacity: 0;
  transition: opacity 0.3s ease;
}

.chart-legend {
  display: flex;
  gap: var(--spacing-md);
}

.legend-color.initial {
  background: var(--primary-color);
}

.legend-color.ongoing {
  background: var(--success-color);
}

/* ===== DETAILED TCO BREAKDOWN TABLE ===== */
.breakdown-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.breakdown-header h3 {
  margin-bottom: 0;
}

.btn-export {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--border-radius);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.3s ease, transform 0.2s ease;
  white-space: nowrap;
}

.btn-export:hover:not(:disabled) {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
}

.btn-export:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.breakdown-table-wrapper {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.breakdown-section {
  margin-bottom: var(--spacing-lg);
}

.breakdown-section:last-child {
  margin-bottom: 0;
}

.tco-breakdown-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  min-width: 700px;
}

.tco-breakdown-table th,
.tco-breakdown-table td {
  padding: var(--spacing-xs) var(--spacing-sm);
  text-align: right;
  border-bottom: 1px solid var(--border-color);
}

.tco-breakdown-table thead th {
  background-color: var(--bg-secondary);
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 2px solid var(--border-color);
  white-space: nowrap;
}

.tco-breakdown-table thead th:first-child {
  text-align: left;
}

.column-group-row th {
  border-bottom: 1px solid var(--border-color);
}

.group-header {
  text-align: center;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}

.pure-group-header {
  color: var(--pure-color);
  border-left: 2px solid var(--pure-color);
  border-right: 2px solid var(--pure-color);
}

.competitor-group-header {
  color: var(--competitor-color);
  border-left: 2px solid var(--competitor-color);
  border-right: 2px solid var(--competitor-color);
}

.tco-breakdown-table .year-label-cell {
  text-align: left;
  font-weight: 500;
  color: var(--text-primary);
  position: sticky;
  left: 0;
  background-color: var(--bg-card);
  z-index: 1;
}

.tco-breakdown-table thead .year-label-cell,
.tco-breakdown-table thead th:first-child {
  position: sticky;
  left: 0;
  background-color: var(--bg-secondary);
  z-index: 2;
}

.tco-breakdown-table .group-total {
  font-weight: 600;
  border-left: 2px solid var(--border-color);
  border-right: 2px solid var(--border-color);
}

.tco-breakdown-table .pure-total-cell {
  color: var(--pure-color);
  border-left-color: var(--pure-color);
  border-right-color: var(--pure-color);
}

.tco-breakdown-table .competitor-total-cell {
  color: var(--competitor-color);
  border-left-color: var(--competitor-color);
  border-right-color: var(--competitor-color);
}

.tco-breakdown-table .row-total {
  font-weight: 600;
  border-left: 2px solid var(--border-color);
}

.tco-breakdown-table .data-row td {
  color: var(--text-secondary);
}

.tco-breakdown-table .data-row .year-label-cell {
  color: var(--text-primary);
}

.tco-breakdown-table .data-row .group-total,
.tco-breakdown-table .data-row .row-total {
  color: var(--text-primary);
}

.tco-breakdown-table .total-row td {
  font-weight: 700;
  border-top: 2px solid var(--border-color);
  color: var(--text-primary);
}

.savings-positive {
  color: var(--success-color);
}

.savings-negative {
  color: var(--error-color);
}

.table-refresh-badge {
  display: inline-block;
  background-color: var(--warning-color);
  color: white;
  padding: 1px 5px;
  border-radius: 8px;
  font-size: 0.6rem;
  font-weight: 600;
  vertical-align: middle;
  margin-left: 4px;
}

/* Legacy breakdown styles */
.cost-breakdown-details {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-md);
  background-color: var(--bg-secondary);
  border-radius: var(--border-radius);
  border-left: 4px solid var(--primary-color);
}

.breakdown-title {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.breakdown-item {
  display: flex;
  justify-content: space-between;
  padding: var(--spacing-xs) 0;
  font-size: 0.9rem;
}

.breakdown-label {
  color: var(--text-secondary);
}

.breakdown-value {
  font-weight: 600;
  color: var(--text-primary);
}

/* ===== WIZARD STEPS ===== */
.progress-container {
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-lg);
  background-color: var(--bg-card);
  border-radius: var(--border-radius);
  box-shadow: 0 2px 4px var(--shadow-color);
}

.progress-bar {
  width: 100%;
  height: 8px;
  background-color: var(--bg-secondary);
  border-radius: 4px;
  margin-bottom: var(--spacing-md);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-hover));
  border-radius: 4px;
  transition: width 0.3s ease;
  width: 20%;
}

.progress-steps {
  display: flex;
  justify-content: space-between;
  gap: var(--spacing-sm);
}

.step-indicator {
  flex: 1;
  text-align: center;
  padding: var(--spacing-xs);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--border-radius);
  transition: all 0.3s ease;
}

.step-indicator.clickable {
  cursor: pointer;
  user-select: none;
}

.step-indicator.clickable:hover {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  transform: translateY(-1px);
  box-shadow: 0 2px 4px var(--shadow-color);
}

.step-indicator.active {
  background-color: var(--primary-color);
  color: white;
}

.step-indicator.active:hover {
  background-color: var(--primary-hover) !important;
  color: white !important;
}

.step-indicator.completed {
  background-color: var(--success-color);
  color: white;
}

.step-indicator.completed:hover {
  background-color: #047857 !important;
  color: white !important;
}

.step-indicator.disabled {
  opacity: 0.5;
  cursor: not-allowed !important;
}

.step-indicator.disabled:hover {
  background-color: transparent !important;
  color: var(--text-secondary) !important;
  transform: none !important;
  box-shadow: none !important;
}

.step-content {
  display: none;
  animation: fadeIn 0.3s ease;
}

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

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

.question-card {
  text-align: center;
  padding: var(--spacing-xl);
  max-width: min(600px, 100%);
  margin: 0 auto;
}

.question-card h2 {
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
  line-height: 1.3;
}

.button-group {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

.btn-primary, .btn-secondary {
  padding: var(--spacing-md) var(--spacing-lg);
  border: none;
  border-radius: var(--border-radius);
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  min-width: 120px;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
}

.btn-primary:disabled {
  background-color: var(--secondary-color);
  cursor: not-allowed;
  opacity: 0.6;
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--bg-secondary);
  border-color: var(--primary-color);
}

.selected-model {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
  color: white;
  padding: var(--spacing-sm);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-md);
  font-weight: 600;
  text-align: center;
  font-size: clamp(0.8rem, 2vw, 1rem);
  word-break: break-word;
}

.pure-section {
  border-left: 4px solid var(--pure-color);
}

.pure-section h3 {
  color: var(--pure-color);
}

.competitor-section {
  border-left: 4px solid var(--competitor-color);
}

.competitor-section h3 {
  color: var(--competitor-color);
}

.speculation-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  margin: var(--spacing-md) 0;
  text-align: center;
}

.speculation-card h3 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
}

.speculation-card p {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.calculate-btn {
  width: 100%;
  background-color: var(--primary-color);
  color: white;
  border: none;
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.3s ease, transform 0.2s ease;
}

.calculate-btn:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
}

/* ===== FOOTER ===== */
.footer {
  background-color: var(--bg-card);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-lg) 0;
  text-align: center;
  color: var(--text-secondary);
  font-size: clamp(0.8rem, 2vw, 1rem);
}

/* ==================================================
   RESPONSIVE: TABLET (max-width: 768px)
   ================================================== */
@media (max-width: 768px) {
  :root {
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
  }

  /* Header */
  .logo {
    font-size: 1.2rem;
  }

  /* Cards */
  .card {
    padding: var(--spacing-md);
  }

  .card:hover {
    transform: none;
    box-shadow: 0 4px 6px var(--shadow-color);
  }

  /* Calculator grid */
  .calculator-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
  }

  /* Results */
  .comparison-results {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
  }

  .result-column {
    padding: var(--spacing-sm);
  }

  .result-item {
    padding: var(--spacing-xs) 0;
  }

  .result-item.highlight {
    padding: var(--spacing-sm);
  }

  .savings-result {
    padding: var(--spacing-sm);
  }

  /* Progress steps */
  .progress-container {
    padding: var(--spacing-md);
  }

  .progress-steps {
    flex-direction: column;
    gap: var(--spacing-xs);
  }

  .step-indicator {
    font-size: 0.8rem;
  }

  /* Question cards */
  .question-card {
    padding: var(--spacing-md);
  }

  .button-group {
    flex-direction: column;
    align-items: center;
  }

  .btn-primary, .btn-secondary {
    width: 100%;
    max-width: 250px;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 1rem;
  }

  /* Chart */
  .horizontal-chart {
    padding: var(--spacing-sm);
  }

  .chart-axis-space {
    width: 40px;
  }

  .chart-y-axis {
    width: 40px;
  }

  .y-axis-label {
    font-size: 0.55rem;
  }

  .chart-legend-space {
    width: 70px;
  }

  .year-header {
    min-width: 45px;
    font-size: 0.7rem;
    padding: 2px 1px;
  }

  .chart-row {
    height: 100px;
    margin-bottom: var(--spacing-sm);
  }

  .row-label {
    width: 70px;
    font-size: 0.75rem;
  }

  .chart-gridline {
    left: 110px;
  }

  .bar-cell {
    min-width: 45px;
    padding: 0 1px;
  }

  .vertical-bar {
    max-width: 40px;
  }

  .bar-amount {
    font-size: 0.55rem;
  }

  .refresh-indicator {
    font-size: 0.5rem;
    padding: 1px 4px;
  }

  .chart-legend-yearly {
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
  }

  .chart-legend {
    flex-direction: column;
    gap: var(--spacing-xs);
  }

  /* Breakdown table */
  .tco-breakdown-table {
    font-size: 0.72rem;
  }

  .tco-breakdown-table th,
  .tco-breakdown-table td {
    padding: 3px 5px;
  }

  .table-refresh-badge {
    display: block;
    margin-left: 0;
    margin-top: 2px;
    width: fit-content;
    font-size: 0.55rem;
  }

  .group-header {
    font-size: 0.8rem;
  }
}

/* ==================================================
   RESPONSIVE: MOBILE (max-width: 480px)
   ================================================== */
@media (max-width: 480px) {
  :root {
    --spacing-md: 1rem;
    --spacing-lg: 1.25rem;
    --spacing-xl: 1.5rem;
    --border-radius: 8px;
  }

  /* Header */
  .header {
    --header-height: 56px;
  }

  .logo {
    font-size: 1rem;
  }

  .theme-toggle {
    width: 36px;
    height: 36px;
    font-size: 1rem;
  }

  /* Cards */
  .card {
    padding: var(--spacing-sm);
  }

  /* Forms */
  .form-group input,
  select {
    padding: var(--spacing-xs);
    font-size: 0.9rem;
  }

  /* Results */
  .result-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
  }

  .result-value {
    text-align: left;
  }

  .result-item.highlight {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-between;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.85rem;
  }

  /* Calculator grid */
  .calculator-grid {
    grid-template-columns: 1fr;
  }

  /* Chart */
  .chart-axis-space {
    width: 30px;
  }

  .chart-y-axis {
    width: 30px;
  }

  .y-axis-label {
    font-size: 0.5rem;
    right: 3px;
  }

  .chart-legend-space {
    width: 50px;
  }

  .row-label {
    width: 50px;
    font-size: 0.6rem;
  }

  .chart-gridline {
    left: 80px;
  }

  .year-header {
    min-width: 35px;
    font-size: 0.6rem;
  }

  .chart-row {
    height: 80px;
  }

  .bar-cell {
    min-width: 35px;
  }

  .vertical-bar {
    max-width: 30px;
  }

  .bar-amount {
    font-size: 0.45rem;
  }

  .refresh-indicator {
    font-size: 0.45rem;
    padding: 1px 3px;
    margin-left: 2px;
  }

  /* Breakdown table */
  .tco-breakdown-table {
    font-size: 0.65rem;
  }

  .tco-breakdown-table th,
  .tco-breakdown-table td {
    padding: 2px 3px;
  }

  .tco-breakdown-table thead th {
    font-size: 0.6rem;
  }

  .table-refresh-badge {
    font-size: 0.5rem;
    padding: 1px 3px;
  }

  .group-header {
    font-size: 0.7rem;
  }

  .btn-export {
    font-size: 0.75rem;
    padding: 4px var(--spacing-xs);
  }

  .calculate-btn {
    padding: var(--spacing-sm);
    font-size: 1rem;
  }

  .bar-segment {
    font-size: 0.8rem;
  }

  .savings-note {
    font-size: 0.75rem;
    padding: var(--spacing-xs);
  }
}