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

:root {
    --primary-color: #2563eb;
    --secondary-color: #047857; /* Darkened for WCAG AA contrast (4.5:1 with white) */
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--text-primary);
    line-height: 1.4;
    min-height: 100vh;
    padding: 8px;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 100%;
    margin: 0 auto;
    width: 100%;
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow: hidden;
}

header {
    text-align: center;
    color: white;
    margin-bottom: 8px;
    padding: 6px;
    flex-shrink: 0;
}

header h1 {
    font-size: 1.8rem;
    margin-bottom: 5px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.subtitle {
    font-size: 1rem;
    opacity: 0.95;
    margin-bottom: 3px;
}

.iso-reference {
    font-size: 0.8rem;
    opacity: 0.85;
    font-style: italic;
}

.calculator-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 8px;
    margin-bottom: 8px;
    flex: 1;
    align-content: start;
    grid-auto-rows: min-content;
    width: 100%;
    grid-auto-flow: row dense;
}

.card {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 10px;
    box-shadow: var(--shadow-lg);
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    flex-direction: column;
    min-height: 0;
    height: fit-content;
    width: 100%;
    max-width: 100%;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-1px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.card.client-section,
.card.input-section {
    min-height: fit-content;
}

/* Data blocks - smaller, modular cards for better reorganization */
.data-block {
    grid-column: span 1;
    min-width: 0;
}

.data-block h2 {
    font-size: 1rem;
    margin-bottom: 8px;
    padding-bottom: 4px;
}

.card.results-section {
    min-height: fit-content;
    max-height: none;
}

.card.comparison-section {
    width: 100%;
    grid-column: 1 / -1;
}

/* Responsive card layout - optimized for better screen utilization */
@media (min-width: 600px) {
    .calculator-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .data-block {
        grid-column: span 1;
    }
    
    .card.input-section {
        grid-column: span 1;
    }
    
    .card.results-section {
        grid-column: span 2;
    }
}

@media (min-width: 900px) {
    .calculator-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .data-block {
        grid-column: span 1;
    }
    
    .card.input-section {
        grid-column: span 2;
    }
    
    .card.results-section {
        grid-column: span 3;
    }
}

@media (min-width: 1200px) {
    .calculator-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .data-block {
        grid-column: span 1;
    }
    
    .card.input-section {
        grid-column: span 2;
    }
    
    .card.results-section {
        grid-column: span 4;
    }
    
    .card.comparison-section {
        grid-column: 1 / -1;
    }
}

@media (min-width: 1600px) {
    .calculator-grid {
        grid-template-columns: repeat(5, 1fr);
    }
    
    .card.client-section {
        grid-column: span 1;
    }
    
    .card.input-section {
        grid-column: span 2;
    }
    
    .card.results-section {
        grid-column: span 4;
    }
    
    .card.comparison-section {
        grid-column: 1 / -1;
    }
}

.card h2 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 1.1rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 4px;
    flex-shrink: 0;
}

.form-group {
    margin-bottom: 10px;
    flex-shrink: 0;
}

.form-group label {
    display: block;
    margin-bottom: 4px;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.85rem;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 8px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.9rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    background: white;
    max-width: 100%;
    box-sizing: border-box;
}

/* Client section inputs - fit content better */
.client-section .form-group input,
.client-section .form-group select {
    max-width: 100%;
    width: 100%;
    min-width: 0;
}

/* Make client section more compact */
.client-section .form-group {
    margin-bottom: 8px;
}

.client-section .form-group label {
    font-size: 0.8rem;
    margin-bottom: 3px;
}

.client-section .form-group input,
.client-section .form-group select {
    padding: 6px 8px;
    font-size: 0.85rem;
}

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

.form-group small {
    display: block;
    margin-top: 5px;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.btn-primary,
.btn-secondary,
.btn-outline {
    width: 100%;
    padding: 10px;
    border: none;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 6px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    position: relative;
    min-height: 36px;
}

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

.btn-primary:hover:not(:disabled) {
    background: #1d4ed8;
    transform: translateY(-1px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.btn-primary:disabled,
.btn-secondary:disabled,
.btn-outline:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn-primary.loading,
.btn-secondary.loading,
.btn-outline.loading {
    pointer-events: none;
}

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

.btn-secondary:hover:not(:disabled) {
    background: #065f46; /* Even darker on hover for better contrast */
    transform: translateY(-1px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

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

.btn-outline:hover:not(:disabled) {
    background: var(--primary-color);
    color: white;
}

/* Loading spinner */
.spinner {
    display: inline-block;
    width: 14px;
    height: 14px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.6s linear infinite;
}

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

/* Toast notifications */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 12px 20px;
    border-radius: 8px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    z-index: 10000;
    font-size: 0.9rem;
    font-weight: 500;
    color: white;
    opacity: 0;
    transform: translateX(400px);
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    max-width: 400px;
    word-wrap: break-word;
}

.toast.show {
    opacity: 1;
    transform: translateX(0);
}

.toast-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.toast-error {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

.toast-info {
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
}

.toast-warning {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

/* Error field highlighting */
.error-field {
    border-color: var(--danger-color) !important;
    background-color: #fef2f2 !important;
    animation: shake 0.3s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* Results animation */
.results-animate {
    animation: fadeInUp 0.5s ease-out;
}

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

/* Highlight section animation */
.highlight-section {
    animation: highlightPulse 2s ease-in-out;
}

@keyframes highlightPulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(37, 99, 235, 0);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(37, 99, 235, 0.3);
    }
}

.results-container {
    min-height: 0;
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.result-placeholder {
    text-align: center;
    color: var(--text-secondary);
    padding: 20px 10px;
    font-style: italic;
    font-size: 0.85rem;
}

.result-item {
    background: var(--bg-color);
    padding: 8px;
    margin-bottom: 8px;
    border-radius: 6px;
    border-left: 3px solid var(--primary-color);
    transition: transform 0.2s, box-shadow 0.2s;
}

.result-item:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.cost-analysis-card {
    background: linear-gradient(135deg, #f0f9ff 0%, #ffffff 100%);
    border-left-color: #3b82f6;
    padding: 16px;
}

.result-header-visual {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

.result-icon {
    font-size: 1.5rem;
}

.result-item h3 {
    color: var(--primary-color);
    margin-bottom: 4px;
    font-size: 0.95rem;
    margin: 0;
}

.result-value-card {
    background: white;
    padding: 12px;
    border-radius: 8px;
    margin-top: 8px;
    border: 2px solid var(--border-color);
}

.result-value-large {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 8px 0;
}

.result-comparison-badge {
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid var(--border-color);
}

.best-indicator {
    display: inline-block;
    background: var(--secondary-color);
    color: white;
    padding: 4px 12px;
    border-radius: 16px;
    font-size: 0.85rem;
    font-weight: 600;
}

.worse-indicator {
    display: inline-block;
    background: #fee2e2;
    color: #991b1b;
    padding: 4px 12px;
    border-radius: 16px;
    font-size: 0.85rem;
    font-weight: 600;
}

.result-value {
    font-size: 1.1rem;
    font-weight: bold;
    color: var(--text-primary);
    margin: 4px 0;
}

.result-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 5px;
}

.result-description {
    color: var(--text-secondary);
    font-size: 0.75rem;
    margin-top: 4px;
    line-height: 1.3;
}

.recommendations-container {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 2px solid var(--border-color);
}

.recommendations-container h3 {
    color: var(--secondary-color);
    margin-bottom: 10px;
    font-size: 1rem;
}

.recommendation-item {
    background: #f0fdf4;
    padding: 6px;
    margin-bottom: 5px;
    border-radius: 6px;
    border-left: 3px solid var(--secondary-color);
    font-size: 0.8rem;
    line-height: 1.3;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
    table-layout: auto;
    font-size: 0.8rem;
}

.comparison-table th,
.comparison-table td {
    padding: 5px 6px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.comparison-table th {
    background: var(--bg-color);
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.75rem;
    padding: 6px 4px;
}

.comparison-table td {
    font-size: 0.8rem;
    max-width: 120px;
}

.comparison-table td:first-child {
    max-width: 150px;
    white-space: normal;
}

.comparison-table tr:hover {
    background: var(--bg-color);
}

/* Make comparison table responsive */
.comparison-section {
    overflow-x: auto;
}

.comparison-section #comparisonResults {
    overflow-x: auto;
    width: 100%;
}

.best-value {
    background: #f0fdf4 !important;
    font-weight: bold;
    color: var(--secondary-color);
}

.best-tool-row {
    background: linear-gradient(90deg, #f0fdf4 0%, #ffffff 100%) !important;
    border-left: 4px solid var(--secondary-color) !important;
}

/* Comparison Summary Cards */
.comparison-summary-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    margin-bottom: 20px;
}

@media (min-width: 768px) {
    .comparison-summary-cards {
        grid-template-columns: repeat(3, 1fr);
    }
}

.summary-card {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 16px;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary-color);
    transition: transform 0.2s, box-shadow 0.2s;
}

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

.best-tool-card {
    border-left-color: #10b981;
    background: linear-gradient(135deg, #f0fdf4 0%, #ffffff 100%);
}

.savings-card {
    border-left-color: #f59e0b;
    background: linear-gradient(135deg, #fffbeb 0%, #ffffff 100%);
}

.improvements-card {
    border-left-color: #2563eb;
    background: linear-gradient(135deg, #eff6ff 0%, #ffffff 100%);
}

.summary-card-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

.summary-icon {
    font-size: 1.5rem;
}

.summary-card-header h3 {
    margin: 0;
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 600;
}

.summary-card-content {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.summary-tool-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.summary-metrics {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.summary-metric {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 0;
    border-bottom: 1px solid var(--border-color);
}

.summary-metric:last-child {
    border-bottom: none;
}

.metric-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.metric-value {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

.metric-value.best {
    color: var(--secondary-color);
    font-weight: 700;
}

.savings-amount {
    font-size: 1.8rem;
    font-weight: 700;
    color: #f59e0b;
    margin-bottom: 4px;
}

.savings-percent {
    font-size: 1rem;
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: 8px;
}

.savings-details {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.savings-breakdown {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid var(--border-color);
}

.improvement-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

.improvement-item:last-child {
    border-bottom: none;
}

.improvement-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.improvement-value {
    font-size: 1rem;
    font-weight: 700;
    color: var(--primary-color);
}

.improvement-percent {
    font-size: 0.8rem;
    color: var(--secondary-color);
    font-weight: 600;
}

/* Tool Comparison Cards Grid */
.comparison-tools-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    margin-bottom: 24px;
}

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

@media (min-width: 1200px) {
    .comparison-tools-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.tool-comparison-card {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 16px;
    box-shadow: var(--shadow);
    border: 2px solid var(--border-color);
    transition: all 0.3s;
    position: relative;
}

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

.best-tool-highlight {
    border: 3px solid var(--secondary-color);
    background: linear-gradient(135deg, #f0fdf4 0%, #ffffff 100%);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
}

.best-tool-badge {
    position: absolute;
    top: -12px;
    right: 16px;
    background: linear-gradient(135deg, var(--secondary-color) 0%, #059669 100%);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
    z-index: 10;
}

.tool-card-header {
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border-color);
}

.tool-card-name {
    margin: 0 0 4px 0;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.tool-card-brand {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.tool-card-body {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.tool-metric-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

.tool-metric-row:last-of-type {
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 8px;
}

.tool-metric-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    flex: 1;
}

.tool-metric-value {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.tool-metric-value.best-metric {
    color: var(--secondary-color);
    font-weight: 700;
}

.tool-metric-value.worse-metric {
    color: var(--danger-color);
}

.best-badge {
    background: var(--secondary-color);
    color: white;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 600;
}

.metric-diff {
    font-size: 0.75rem;
    color: var(--danger-color);
    font-weight: 500;
}

.tool-card-details {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid var(--border-color);
}

.tool-detail-item {
    font-size: 0.8rem;
    color: var(--text-secondary);
    display: flex;
    justify-content: space-between;
}

.tool-detail-item strong {
    color: var(--text-primary);
}

.tool-card-actions {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 2px solid var(--border-color);
}

.tool-card-actions button {
    flex: 1;
    padding: 8px;
    font-size: 0.85rem;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
}

.tool-card-actions .btn-edit-tool {
    background: var(--primary-color);
    color: white;
}

.tool-card-actions .btn-edit-tool:hover {
    background: #1d4ed8;
    transform: translateY(-1px);
}

.tool-card-actions .btn-delete-tool {
    background: var(--danger-color);
    color: white;
}

.tool-card-actions .btn-delete-tool:hover {
    background: #dc2626;
    transform: translateY(-1px);
}

.comparison-table-container {
    margin-top: 24px;
    padding-top: 24px;
    border-top: 2px solid var(--border-color);
}

.metric-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 600;
    margin: 5px 5px 5px 0;
}

.badge-excellent {
    background: #d1fae5;
    color: #065f46;
}

.badge-good {
    background: #dbeafe;
    color: #1e40af;
}

.badge-fair {
    background: #fef3c7;
    color: #92400e;
}

.badge-poor {
    background: #fee2e2;
    color: #991b1b;
}

footer {
    text-align: center;
    color: white;
    padding: 6px;
    opacity: 0.9;
    font-size: 0.75rem;
    margin-top: 8px;
    flex-shrink: 0;
}

footer p {
    margin: 2px 0;
}

footer a {
    color: white;
    text-decoration: none;
    transition: opacity 0.2s;
}

footer a:hover {
    opacity: 0.8;
    text-decoration: underline;
}

footer img {
    filter: brightness(0) invert(1);
}

footer img:hover {
    opacity: 1;
}

/* Technical Engineering Styles */
.technical-specs,
.engineering-formulas {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 2px solid var(--border-color);
}

.technical-specs h3,
.engineering-formulas h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 1rem;
    font-weight: 700;
}

.technical-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 8px;
    font-size: 0.8rem;
    background: var(--card-bg);
}

.technical-table th {
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    color: white;
    padding: 6px 8px;
    text-align: left;
    font-weight: 600;
    border: 1px solid #1d4ed8;
}

.technical-table td {
    padding: 6px 8px;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
}

.technical-table tr:nth-child(even) td {
    background: #f8fafc;
}

.technical-table tr:hover td {
    background: #e0f2fe;
}

.technical-table td:nth-child(2) {
    font-family: 'Courier New', monospace;
    font-weight: 600;
    color: var(--primary-color);
}

.technical-table td:nth-child(3) {
    font-family: 'Courier New', monospace;
    text-align: right;
    font-weight: 600;
}

.formula-section {
    background: #f8fafc;
    padding: 8px;
    margin-bottom: 8px;
    border-radius: 6px;
    border-left: 3px solid var(--primary-color);
}

.formula-section h4 {
    color: var(--primary-color);
    margin-bottom: 6px;
    font-size: 0.9rem;
    font-weight: 600;
}

.formula {
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    padding: 6px;
    background: white;
    border-radius: 4px;
    margin: 4px 0;
    text-align: center;
    border: 1px solid var(--border-color);
}

.formula sub {
    font-size: 0.8em;
    vertical-align: sub;
}

.formula sup {
    font-size: 0.8em;
    vertical-align: super;
}

.formula-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 5px;
    font-style: italic;
}

.result-item h3 {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.result-value {
    font-family: 'Courier New', monospace;
    font-weight: 700;
}

.result-description {
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
}

/* Engineering-focused input styling */
.form-group label sub {
    font-size: 0.75em;
    vertical-align: sub;
    color: var(--primary-color);
    font-weight: 600;
}

.form-group small {
    font-family: 'Courier New', monospace;
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-top: 2px;
    display: block;
}

/* Technical badge styling */
.metric-badge {
    font-family: 'Courier New', monospace;
    font-weight: 700;
}

/* Enhanced card styling for technical sections */
.card {
    border: 1px solid var(--border-color);
}

.card h2 {
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    font-size: 1.3rem;
}

.section-divider {
    margin: 12px 0 8px 0;
    padding-bottom: 4px;
    border-bottom: 2px solid var(--border-color);
}

.section-divider h3 {
    color: var(--primary-color);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    margin: 0;
}

/* Technical data display */
.result-label {
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.3px;
    color: var(--text-secondary);
    margin-bottom: 3px;
}

.result-label sub {
    font-size: 0.7em;
    vertical-align: sub;
}

/* Chart Containers */
.chart-container {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 2px solid var(--border-color);
}

.chart-container h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 1rem;
    font-weight: 700;
}

.chart-container canvas {
    max-height: min(300px, 30vh);
    width: 100% !important;
    height: auto !important;
}

.comparison-charts {
    margin-top: 8px;
    padding-top: 8px;
    border-top: 2px solid var(--border-color);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(200px, 100%), 1fr));
    gap: 6px;
}

.chart-wrapper {
    background: var(--bg-color);
    padding: 8px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    min-width: 0;
}

.chart-wrapper h3 {
    color: var(--primary-color);
    font-size: 0.85rem;
    margin-bottom: 4px;
    font-weight: 600;
}

.chart-wrapper canvas {
    max-height: min(200px, 20vh);
    width: 100% !important;
    height: auto !important;
}

/* Savings Summary */
.savings-summary {
    margin-top: 8px;
    padding-top: 8px;
    border-top: 2px solid var(--border-color);
}

.savings-summary h3 {
    color: var(--secondary-color);
    margin-bottom: 8px;
    font-size: 0.95rem;
    font-weight: 700;
}

.savings-item {
    background: var(--bg-color);
    padding: 6px 8px;
    margin-bottom: 6px;
    border-radius: 6px;
    border-left: 3px solid var(--primary-color);
}

.savings-item.best-tool {
    border-left-color: var(--secondary-color);
    background: #f0fdf4;
}

.savings-item.worst-tool {
    border-left-color: var(--danger-color);
    background: #fef2f2;
}

.savings-item.savings-highlight {
    border-left-color: var(--secondary-color);
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
    border-width: 3px;
}

.savings-item.annual-savings {
    border-left-color: #f59e0b;
    background: #fffbeb;
}

.savings-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.savings-value {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.savings-value-large {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin: 4px 0;
    font-family: 'Courier New', monospace;
}

.savings-cost {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-family: 'Courier New', monospace;
}

.savings-details {
    margin-top: 4px;
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.savings-details div {
    margin-bottom: 2px;
}

/* Photo Upload & Crop Styles */
#photoPreviewContainer {
    position: relative;
}

#photoPreviewImg {
    cursor: pointer;
    transition: opacity 0.2s;
}

#photoPreviewImg:hover {
    opacity: 0.9;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    overflow: auto;
}

.modal-content {
    background-color: var(--card-bg);
    margin: 1% auto;
    padding: 0;
    border-radius: 8px;
    width: min(95%, 900px);
    max-height: 98vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 15px;
    border-bottom: 2px solid var(--border-color);
}

.modal-header h3 {
    margin: 0;
    color: var(--primary-color);
    font-size: 1.1rem;
}

.modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s;
}

.modal-close:hover {
    color: var(--danger-color);
}

.modal-body {
    padding: 10px;
    flex: 1;
    overflow-y: auto;
    min-height: 0;
    max-height: calc(98vh - 150px);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    padding: 12px 15px;
    border-top: 2px solid var(--border-color);
}

.modal-footer button {
    margin: 0;
    width: auto;
    min-width: 120px;
}

#cropContainer {
    background: #f8fafc;
    border-radius: 8px;
    overflow: hidden;
    max-height: min(500px, 70vh);
}

#cropImage {
    max-width: 100%;
    max-height: min(500px, 70vh);
    object-fit: contain;
}

.tool-photo-display {
    max-width: 200px;
    max-height: 200px;
    border-radius: 8px;
    border: 2px solid var(--border-color);
    margin: 10px 0;
    object-fit: cover;
}

.modal-body textarea {
    width: 100%;
    padding: 8px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.9rem;
    font-family: inherit;
    resize: vertical;
    transition: border-color 0.2s, box-shadow 0.2s;
}

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

.modal-body label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.modal-body input[type="checkbox"] {
    width: auto;
    cursor: pointer;
}

@media (max-width: 768px) {
    .calculator-grid {
        grid-template-columns: 1fr;
        gap: 6px;
    }
    
    .data-block,
    .card.input-section,
    .card.results-section {
        grid-column: span 1;
    }
    
    .card.comparison-section {
        grid-column: 1;
    }
    
    header h1 {
        font-size: 1.3rem;
    }
    
    .card {
        padding: 10px;
        width: 100%;
        max-width: 100%;
    }
    
    body {
        padding: 6px;
    }
    
    header {
        padding: 4px;
    }
    
    footer {
        padding: 4px;
    }
    
    .comparison-table {
        font-size: 0.75rem;
    }
    
    .comparison-table th,
    .comparison-table td {
        padding: 4px 3px;
        font-size: 0.7rem;
    }
    
    .comparison-charts {
        grid-template-columns: 1fr;
    }
    
    .chart-wrapper canvas {
        max-height: min(180px, 30vh);
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.1rem;
    }
    
    .subtitle {
        font-size: 0.85rem;
    }
    
    .card h2 {
        font-size: 1rem;
    }
    
    .form-group {
        margin-bottom: 8px;
    }
}