/* =====================================================
   U-Value Calculator Styles
   Engineering-focused professional design
   ===================================================== */

:root {
    /* Primary Colors - Grey Monochrome */
    --uvalue-primary: #4b5563;
    --uvalue-primary-light: #6b7280;
    --uvalue-primary-dark: #374151;

    /* Accent Colors - Dark Grey */
    --uvalue-accent: #4b5563;
    --uvalue-accent-light: #6b7280;

    /* Neutral Colors */
    --uvalue-bg: #ffffff;
    --uvalue-bg-light: #f9fafb;
    --uvalue-bg-gray: #f3f4f6;
    --uvalue-text: #111827;
    --uvalue-text-light: #6b7280;
    --uvalue-border: #d1d5db;
    --uvalue-border-dark: #9ca3af;

    /* Material Colors */
    --lambda-very-high: #ef4444;
    /* Red */
    --lambda-high: #f97316;
    /* Orange */
    --lambda-medium: #eab308;
    /* Yellow */
    --lambda-low: #22c55e;
    /* Green */
    --lambda-very-low: #3b82f6;
    /* Blue */

    /* Shadow - More subtle for engineering style */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 2px 4px -1px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

/* RTL Support */
[dir="rtl"] .uvalue-calculator-wrapper {
    direction: rtl;
}

/* Wrapper - More compact */
.uvalue-calculator-wrapper {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--uvalue-text);
    background: #f9fafb;
    padding: 1rem;
    border-radius: 0.5rem;
    margin: 1rem 0;
}

/* Header - Compact */
.uvalue-header {
    background: var(--uvalue-bg);
    border-radius: 0.375rem;
    border: 1px solid var(--uvalue-border);
    box-shadow: var(--shadow-sm);
    padding: 1.25rem;
    margin-bottom: 1rem;
}

.uvalue-header-content {
    margin-bottom: 1rem;
}

.uvalue-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--uvalue-primary);
    margin: 0 0 0.375rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    letter-spacing: -0.025em;
}

.uvalue-icon {
    color: var(--uvalue-primary-light);
}

.uvalue-subtitle {
    color: var(--uvalue-text-light);
    margin: 0;
    font-size: 0.875rem;
    line-height: 1.4;
}

.uvalue-header-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* Grid Layout - Tighter */
.uvalue-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

@media (min-width: 1024px) {
    .uvalue-grid {
        grid-template-columns: 2fr 1fr;
    }
}

.uvalue-grid-2 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.75rem;
}

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

/* Cards - More compact and structured */
.uvalue-card {
    background: var(--uvalue-bg);
    border-radius: 0.375rem;
    border: 1px solid var(--uvalue-border);
    box-shadow: var(--shadow-sm);
    padding: 1rem;
    margin-bottom: 1rem;
}

.uvalue-card:last-child {
    margin-bottom: 0;
}

.uvalue-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.uvalue-card-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--uvalue-text);
    margin: 0 0 0.75rem 0;
    display: flex;
    align-items: center;
    gap: 0.375rem;
    text-transform: uppercase;
    letter-spacing: 0.025em;
    font-size: 0.875rem;
}

.uvalue-card-icon {
    color: var(--uvalue-primary-light);
}

/* Form Elements - Engineering style */
.uvalue-form-group {
    margin-bottom: 0;
}

.uvalue-form-group label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--uvalue-text);
    margin-bottom: 0.375rem;
    letter-spacing: 0.025em;
}

.uvalue-input {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--uvalue-border);
    border-radius: 0.25rem;
    font-size: 0.875rem;
    transition: all 0.15s;
    background: var(--uvalue-bg);
    color: var(--uvalue-text);
    font-family: 'Courier New', 'Consolas', monospace;
    font-weight: 500;
    line-height: 1.5;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.uvalue-select {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--uvalue-border);
    border-radius: 0.25rem;
    font-size: 0.875rem;
    transition: all 0.15s;
    background: var(--uvalue-bg);
    color: var(--uvalue-text);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
    font-weight: 400;
    line-height: 1.5;
    height: auto;
    min-height: 2.5rem;
    vertical-align: middle;
    box-sizing: border-box;
    -webkit-appearance: menulist;
    -moz-appearance: menulist;
    appearance: menulist;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.uvalue-select option {
    padding: 0.5rem;
    line-height: 1.5;
}

.uvalue-input:focus,
.uvalue-select:focus {
    outline: none;
    border-color: var(--uvalue-primary);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.1);
}

.uvalue-input:disabled,
.uvalue-select:disabled {
    background: var(--uvalue-bg-gray);
    cursor: not-allowed;
    opacity: 0.6;
}

.uvalue-hint {
    display: block;
    font-size: 0.6875rem;
    color: var(--uvalue-text-light);
    margin-top: 0.25rem;
    font-style: italic;
}

/* Buttons - More compact */
.uvalue-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 0.25rem;
    font-size: 0.8125rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
    text-decoration: none;
    justify-content: center;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

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

.uvalue-btn-primary:hover {
    background: var(--uvalue-primary-dark);
    box-shadow: var(--shadow-md);
}

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

.uvalue-btn-secondary:hover {
    background: var(--uvalue-accent-light);
}

.uvalue-btn-danger {
    background: #ef4444;
    color: white;
    padding: 0.375rem;
}

.uvalue-btn-danger:hover {
    background: #dc2626;
}

.uvalue-btn-block {
    width: 100%;
}

.uvalue-btn svg {
    flex-shrink: 0;
}

/* Layer Item - More compact */
.uvalue-layer {
    background: var(--uvalue-bg-light);
    border: 1px solid var(--uvalue-border);
    border-radius: 0.25rem;
    padding: 0.75rem;
    margin-bottom: 0.75rem;
}

.uvalue-layer:last-child {
    margin-bottom: 0;
}

.uvalue-layer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.625rem;
}

.uvalue-layer-title {
    font-weight: 700;
    color: var(--uvalue-text);
    display: flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.uvalue-layer-fields {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.625rem;
}

@media (min-width: 768px) {
    .uvalue-layer-fields {
        grid-template-columns: 2fr 1fr 1fr;
    }
}

.uvalue-layer-resistance {
    margin-top: 0.5rem;
    padding: 0.5rem;
    background: var(--uvalue-bg);
    border-radius: 0.25rem;
    font-size: 0.8125rem;
    color: var(--uvalue-text-light);
    border: 1px solid var(--uvalue-border);
    font-family: 'Courier New', 'Consolas', monospace;
}

.uvalue-layer-resistance strong {
    color: var(--uvalue-text);
    font-weight: 700;
}

/* Material Color Badges */
.uvalue-badge {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.lambda-very-high {
    background: #fee2e2;
    color: #991b1b;
}

.lambda-high {
    background: #ffedd5;
    color: #9a3412;
}

.lambda-medium {
    background: #fef3c7;
    color: #854d0e;
}

.lambda-low {
    background: #dcfce7;
    color: #166534;
}

.lambda-very-low {
    background: #dbeafe;
    color: #1e40af;
}

/* Results Card - Engineering style */
.uvalue-results-card {
    background: linear-gradient(135deg, #374151 0%, #4b5563 100%);
    color: white;
    border: 2px solid var(--uvalue-primary-dark);
}

.uvalue-results-card .uvalue-card-title {
    color: white;
}

.uvalue-result-box {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 0.25rem;
    padding: 0.75rem;
    margin-bottom: 0.75rem;
}

.uvalue-result-box:last-child {
    margin-bottom: 0;
}

.uvalue-result-primary {
    background: rgba(255, 255, 255, 0.12);
    border: 2px solid rgba(255, 255, 255, 0.25);
}

.uvalue-result-label {
    font-size: 0.75rem;
    opacity: 0.9;
    margin-bottom: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.uvalue-result-value {
    font-size: 1.75rem;
    font-weight: 700;
    font-family: 'Courier New', 'Consolas', monospace;
    letter-spacing: -0.025em;
}

.uvalue-result-unit {
    font-size: 0.8125rem;
    opacity: 0.85;
    font-family: 'Courier New', 'Consolas', monospace;
}

/* Breakdown - Engineering precision */
.uvalue-breakdown {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.uvalue-breakdown-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--uvalue-border);
    font-size: 0.8125rem;
    color: var(--uvalue-text-light);
}

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

.uvalue-breakdown-item span:first-child {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.uvalue-breakdown-item span:last-child {
    font-weight: 700;
    color: var(--uvalue-text);
    font-family: 'Courier New', 'Consolas', monospace;
    font-size: 0.8125rem;
}

.uvalue-breakdown-total {
    background: var(--uvalue-bg-light);
    border-radius: 0.25rem;
    padding: 0.625rem 0.75rem;
    border: 2px solid var(--uvalue-primary);
    margin-top: 0.5rem;
}

.uvalue-breakdown-total span {
    font-weight: 700;
    color: var(--uvalue-primary);
}

.uvalue-breakdown-total span:last-child {
    font-size: 0.9375rem;
}

/* Example Card */
.uvalue-example-card {
    background: linear-gradient(135deg, #f3f4f6 0%, #e5e7eb 100%);
    border: 2px solid #9ca3af;
}

.uvalue-example-text {
    color: #374151;
    margin: 0 0 0.625rem 0;
    font-size: 0.8125rem;
    font-weight: 600;
}

.uvalue-example-result {
    background: white;
    border-radius: 0.25rem;
    padding: 0.75rem;
    border: 1px solid #d1d5db;
}

.uvalue-example-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: #1f2937;
    font-family: 'Courier New', 'Consolas', monospace;
}

.uvalue-example-formula {
    font-size: 0.6875rem;
    color: var(--uvalue-text-light);
    margin-top: 0.375rem;
    font-family: 'Courier New', 'Consolas', monospace;
}

/* Legend - More compact */
.uvalue-legend {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.uvalue-legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
}

.uvalue-legend-item .uvalue-badge {
    font-size: 1.25rem;
    padding: 0;
    background: transparent;
    line-height: 1;
}

/* Formula Card */
.uvalue-formula-card {
    background: var(--uvalue-bg-gray);
    border: 1px solid var(--uvalue-border);
}

.uvalue-formula-box {
    background: var(--uvalue-bg);
    padding: 0.75rem;
    border-radius: 0.25rem;
    border-left: 3px solid var(--uvalue-primary);
    border: 1px solid var(--uvalue-border);
    border-left: 3px solid var(--uvalue-primary);
}

.uvalue-formula-box strong {
    display: block;
    margin-bottom: 0.375rem;
    color: var(--uvalue-text);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.uvalue-formula-box code {
    font-family: 'Courier New', 'Consolas', monospace;
    font-size: 0.8125rem;
    color: var(--uvalue-primary);
    background: var(--uvalue-bg-light);
    padding: 0.375rem 0.625rem;
    border-radius: 0.25rem;
    display: inline-block;
    font-weight: 600;
}

/* Link Card */
.uvalue-card-link {
    background: linear-gradient(135deg, #f9fafb 0%, #f3f4f6 100%);
    border: 2px solid var(--uvalue-accent);
    text-align: center;
}

.uvalue-card-link p {
    color: #374151;
    margin: 0 0 0.75rem 0;
    font-weight: 600;
    font-size: 0.875rem;
}

/* Modal - Compact engineering style */
.uvalue-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.uvalue-modal-content {
    background: white;
    border-radius: 0.375rem;
    border: 1px solid var(--uvalue-border);
    box-shadow: var(--shadow-xl);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
}

.uvalue-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--uvalue-border);
    background: var(--uvalue-bg-light);
}

.uvalue-modal-header h3 {
    margin: 0;
    color: var(--uvalue-text);
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.uvalue-modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--uvalue-text-light);
    cursor: pointer;
    padding: 0;
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.25rem;
}

.uvalue-modal-close:hover {
    background: var(--uvalue-bg-gray);
    color: var(--uvalue-text);
}

.uvalue-modal-body {
    padding: 1rem;
}

.uvalue-share-section {
    margin-bottom: 1rem;
}

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

.uvalue-share-section label {
    display: block;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--uvalue-text);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.uvalue-input-group {
    display: flex;
    gap: 0.5rem;
}

.uvalue-input-group .uvalue-input {
    flex: 1;
}

/* Print Styles */
@media print {
    .uvalue-calculator-wrapper {
        background: white;
        padding: 0;
    }

    .no-print,
    .uvalue-header-actions,
    .uvalue-btn,
    .uvalue-modal,
    .uvalue-formula-card,
    .uvalue-card-link {
        display: none !important;
    }

    .uvalue-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid var(--uvalue-border);
        margin-bottom: 0.5rem;
        page-break-inside: avoid;
    }

    .uvalue-grid {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }

    .uvalue-header {
        padding: 0.75rem;
        margin-bottom: 0.5rem;
    }
}

/* Responsive - Mobile optimized */
@media (max-width: 768px) {
    .uvalue-calculator-wrapper {
        padding: 0.75rem;
        margin: 0.5rem 0;
    }

    .uvalue-header {
        padding: 1rem;
        margin-bottom: 0.75rem;
    }

    .uvalue-title {
        font-size: 1.25rem;
    }

    .uvalue-subtitle {
        font-size: 0.8125rem;
    }

    .uvalue-header-actions {
        flex-direction: column;
    }

    .uvalue-btn {
        width: 100%;
    }

    .uvalue-card {
        padding: 0.75rem;
        margin-bottom: 0.75rem;
    }

    .uvalue-result-value {
        font-size: 1.5rem;
    }

    .uvalue-layer {
        padding: 0.625rem;
    }
}

/* Loading State */
.uvalue-loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Animations - Subtle for engineering style */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.uvalue-layer {
    animation: slideIn 0.2s ease-out;
}

/* Focus visible for accessibility */
.uvalue-btn:focus-visible,
.uvalue-input:focus-visible,
.uvalue-select:focus-visible {
    outline: 2px solid var(--uvalue-primary);
    outline-offset: 2px;
}