/* ========================================
   EV vs Petrol Calculator - Advanced Styles
   ======================================== */

:root {
    /* Colors */
    --primary-green: #10b981;
    --primary-green-dark: #059669;
    --secondary-orange: #f59e0b;
    --petrol-red: #ef4444;
    --ev-blue: #3b82f6;
    --background: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
}

/* Reset and Base Styles */
.ev-calculator-wrapper * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

.ev-calculator-wrapper {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
}

/* Header Section */
.calculator-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    animation: fadeInDown 0.6s ease-out;
}

.calculator-title {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-green), var(--ev-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.calculator-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    font-weight: 400;
}

/* Vehicle Type Selector */
.vehicle-type-selector {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    background: var(--card-bg);
    padding: var(--spacing-sm);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.type-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border: 2px solid var(--border-color);
    background: white;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.type-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-green), var(--ev-blue));
    opacity: 0;
    transition: opacity var(--transition-base);
    z-index: 0;
}

.type-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.type-btn.active {
    border-color: var(--primary-green);
    color: white;
}

.type-btn.active::before {
    opacity: 1;
}

.type-btn span,
.type-icon {
    position: relative;
    z-index: 1;
}

.type-icon {
    width: 24px;
    height: 24px;
}

/* Calculator Body */
.calculator-body {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
    animation: fadeInUp 0.6s ease-out 0.4s both;
}

/* Vehicle Sections */
.vehicle-section {
    background: var(--card-bg);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.vehicle-section:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.section-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 3px solid;
}

.petrol-header {
    border-color: var(--petrol-red);
}

.ev-header {
    border-color: var(--primary-green);
}

.section-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
}

.fuel-icon {
    font-size: 1.75rem;
}

/* Input Groups */
.input-group {
    margin-bottom: var(--spacing-lg);
}

.input-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.vehicle-select,
.input-group input[type="number"] {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: all var(--transition-fast);
    background: white;
}

.vehicle-select:focus,
.input-group input[type="number"]:focus {
    outline: none;
    border-color: var(--primary-green);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.vehicle-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2364748b'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 1.25rem;
    padding-right: 2.5rem;
    cursor: pointer;
}

.input-helper {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
    font-style: italic;
}

/* Cost Display */
.cost-display {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    animation: pulse 2s infinite;
}

.petrol-cost {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1), rgba(239, 68, 68, 0.05));
    border: 2px solid rgba(239, 68, 68, 0.3);
}

.ev-cost {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(16, 185, 129, 0.05));
    border: 2px solid rgba(16, 185, 129, 0.3);
}

.cost-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.cost-value {
    font-size: 2rem;
    font-weight: 800;
    margin-top: var(--spacing-xs);
}

.petrol-cost .cost-value {
    color: var(--petrol-red);
}

.ev-cost .cost-value {
    color: var(--primary-green);
}

/* VS Divider */
.vs-divider {
    display: flex;
    align-items: center;
    justify-content: center;
}

.vs-text {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--secondary-orange), var(--petrol-red));
    color: white;
    font-size: 1.25rem;
    font-weight: 800;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-lg);
    animation: rotate 3s linear infinite;
}

/* Results Section */
.results-section {
    animation: fadeInUp 0.6s ease-out;
}

.savings-card {
    background: linear-gradient(135deg, var(--primary-green), var(--ev-blue));
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    color: white;
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-xl);
}

.savings-header h3 {
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

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

.saving-item {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: transform var(--transition-base);
}

.saving-item:hover {
    transform: scale(1.05);
    background: rgba(255, 255, 255, 0.2);
}

.saving-item.highlight {
    background: rgba(255, 255, 255, 0.25);
    border: 2px solid rgba(255, 255, 255, 0.5);
}

.saving-label {
    font-size: 0.875rem;
    opacity: 0.9;
    margin-bottom: var(--spacing-xs);
}

.saving-value {
    font-size: 1.75rem;
    font-weight: 800;
}

.savings-percentage {
    text-align: center;
    font-size: 1.25rem;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
}

/* Advanced Comparison */
.advanced-comparison {
    background: var(--card-bg);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    margin-bottom: var(--spacing-xl);
}

.toggle-advanced {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: none;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    transition: all var(--transition-base);
}

.toggle-advanced:hover {
    background: var(--background);
    border-color: var(--primary-green);
}

.toggle-advanced.active .arrow-icon {
    transform: rotate(180deg);
}

.arrow-icon {
    width: 20px;
    height: 20px;
    transition: transform var(--transition-base);
}

.advanced-content {
    margin-top: var(--spacing-xl);
}

.advanced-content h4 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

/* Ownership Analysis */
.ownership-analysis {
    margin-bottom: var(--spacing-2xl);
}

.ownership-comparison {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.ownership-bar {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.bar-label {
    min-width: 80px;
    font-weight: 600;
}

.bar-container {
    flex: 1;
    position: relative;
    height: 50px;
    background: var(--background);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.bar {
    height: 100%;
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-md);
    transition: width var(--transition-slow);
    position: relative;
}

.petrol-bar {
    background: linear-gradient(90deg, var(--petrol-red), #fca5a5);
}

.ev-bar {
    background: linear-gradient(90deg, var(--primary-green), #6ee7b7);
}

.bar-value {
    position: absolute;
    right: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    font-weight: 700;
    color: var(--text-primary);
}

.ownership-note {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--background);
    border-left: 4px solid var(--primary-green);
    border-radius: var(--radius-sm);
    font-size: 1rem;
}

/* Break-even Section */
.breakeven-section {
    margin-bottom: var(--spacing-2xl);
}

.breakeven-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.breakeven-stat {
    padding: var(--spacing-lg);
    background: var(--background);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

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

.breakeven-note {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* Environmental Section */
.environmental-section {
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(59, 130, 246, 0.1));
    border-radius: var(--radius-lg);
}

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

.env-stat {
    text-align: center;
}

.env-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.env-value {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--primary-green);
    margin-bottom: var(--spacing-xs);
}

.env-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* CTA Section */
.cta-section {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.btn-primary,
.btn-secondary {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-green), var(--ev-blue));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

.btn-icon {
    width: 20px;
    height: 20px;
}

/* Info Cards */
.info-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.6s ease-out 0.6s both;
}

.info-card {
    background: var(--card-bg);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: transform var(--transition-base);
}

.info-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.info-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.info-card h4 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.info-card p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Footer */
.calculator-footer {
    text-align: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

.calculator-footer p {
    margin-bottom: var(--spacing-xs);
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.calculator-footer a {
    color: var(--primary-green);
    text-decoration: none;
    font-weight: 600;
    transition: color var(--transition-fast);
}

.calculator-footer a:hover {
    color: var(--primary-green-dark);
    text-decoration: underline;
}

.disclaimer {
    font-size: 0.8125rem !important;
    font-style: italic;
}

/* Animations */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.02);
    }
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* Responsive Design */
@media (max-width: 968px) {
    .calculator-body {
        grid-template-columns: 1fr;
    }
    
    .vs-divider {
        transform: rotate(90deg);
        margin: var(--spacing-lg) 0;
    }
    
    .calculator-title {
        font-size: 2rem;
    }
    
    .savings-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .ev-calculator-wrapper {
        padding: var(--spacing-md);
    }
    
    .calculator-title {
        font-size: 1.75rem;
    }
    
    .calculator-subtitle {
        font-size: 1rem;
    }
    
    .vehicle-type-selector {
        flex-direction: column;
    }
    
    .vehicle-section {
        padding: var(--spacing-lg);
    }
    
    .savings-card {
        padding: var(--spacing-lg);
    }
    
    .savings-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .cta-section {
        flex-direction: column;
    }
    
    .info-cards {
        grid-template-columns: 1fr;
    }
    
    .cost-value {
        font-size: 1.5rem;
    }
    
    .saving-value {
        font-size: 1.5rem;
    }
}

/* Print Styles */
@media print {
    .vehicle-type-selector,
    .cta-section,
    .info-cards {
        display: none;
    }
    
    .calculator-body,
    .results-section {
        break-inside: avoid;
    }
}