/* AccuHip ROM Calculator Styles */

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

:root {
    /* Color Palette */
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --background: #f8fafc;
    --surface: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
}

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

/* Header Styles */
.main-header {
    background-color: var(--surface);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.header-content {
    max-width: 1600px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.header-nav {
    display: flex;
    gap: var(--spacing-md);
}

.nav-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 1px solid var(--border-color);
    background: var(--surface);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.2s;
}

.nav-btn:hover {
    background-color: var(--background);
}

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

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

/* Main Container Layout */
.main-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    display: grid;
    grid-template-columns: 320px 1fr 320px;
    gap: var(--spacing-lg);
    min-height: calc(100vh - 80px);
}

/* Input Panel Styles */
.input-panel {
    background-color: var(--surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    overflow-y: auto;
    max-height: calc(100vh - 120px);
}

.panel-section {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
}

.panel-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.section-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

/* Parameter Inputs */
.parameter {
    margin-bottom: var(--spacing-lg);
}

.parameter label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

.input-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

input[type="range"] {
    flex: 1;
    height: 6px;
    background: var(--border-color);
    outline: none;
    border-radius: 3px;
    -webkit-appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    border: none;
}

.number-input {
    width: 60px;
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    text-align: center;
}

.unit {
    font-size: 0.875rem;
    color: var(--text-secondary);
    min-width: 25px;
}

.range-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

/* Radio and Checkbox Styles */
.scenario-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.radio-option {
    display: flex;
    align-items: flex-start;
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s;
}

.radio-option:hover {
    background-color: var(--background);
}

.radio-option input[type="radio"] {
    margin-right: var(--spacing-md);
    margin-top: 2px;
}

.radio-option input[type="radio"]:checked + .radio-content {
    color: var(--primary-color);
}

.radio-content {
    display: flex;
    flex-direction: column;
}

.radio-title {
    font-weight: 500;
    font-size: 0.875rem;
}

.radio-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.checkbox-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    cursor: pointer;
    user-select: none;
}

/* Button Styles */
.reset-btn {
    width: 100%;
    padding: var(--spacing-sm);
    background-color: var(--background);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.2s;
}

.reset-btn:hover {
    background-color: var(--border-color);
}

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

.demo-btn {
    padding: var(--spacing-sm);
    background-color: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.2s;
}

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

.play-demo-btn {
    width: 100%;
    padding: var(--spacing-md);
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.play-demo-btn:hover {
    background-color: var(--primary-hover);
}

/* Visualization Panel */
.visualization-panel {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.viz-container {
    background-color: var(--surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    flex: 1;
}

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

.viz-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.viz-controls {
    display: flex;
    gap: var(--spacing-sm);
}

.viz-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--background);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.2s;
}

.viz-btn:hover {
    background-color: var(--border-color);
}

.threejs-container {
    width: 100%;
    height: 400px;
    background-color: #f0f4f8;
    border-radius: var(--radius-md);
    position: relative;
    overflow: hidden;
}

.view-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.view-selector, .display-options {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 0.875rem;
}

.display-options label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    cursor: pointer;
}

/* Motion Preview */
.motion-preview {
    background-color: var(--surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.motion-preview h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.current-angle {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

.motion-slider-container {
    margin-bottom: var(--spacing-md);
}

.motion-slider {
    width: 100%;
    margin-bottom: var(--spacing-sm);
}

.motion-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.motion-controls {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.motion-btn {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.2s;
}

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

.speed-select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--surface);
    font-size: 0.875rem;
}

.motion-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
}

/* Results Panel */
.results-panel {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.rom-display {
    background-color: var(--surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.rom-display h2 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

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

.rom-value-card {
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    text-align: center;
    transition: all 0.2s;
}

.rom-value-card.safe {
    border-color: var(--success-color);
    background-color: rgba(16, 185, 129, 0.05);
}

.rom-value-card.warning {
    border-color: var(--warning-color);
    background-color: rgba(245, 158, 11, 0.05);
}

.rom-value-card.danger {
    border-color: var(--danger-color);
    background-color: rgba(239, 68, 68, 0.05);
}

.rom-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.rom-number {
    font-size: 2rem;
    font-weight: 700;
}

.rom-status {
    font-size: 0.75rem;
    margin-top: var(--spacing-xs);
}

.report-btn {
    width: 100%;
    padding: var(--spacing-md);
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

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

/* Comparison Chart */
.comparison-chart {
    background-color: var(--surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.comparison-chart h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

#comparisonChart {
    max-height: 250px;
}

.chart-legend {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-md);
    font-size: 0.875rem;
}

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

.legend-item::before {
    content: '';
    width: 16px;
    height: 16px;
    border-radius: var(--radius-sm);
    background-color: var(--text-secondary);
}

.legend-item.baseline::before {
    background-color: #94a3b8;
}

.legend-item.current::before {
    background-color: var(--primary-color);
}

/* Clinical Insights */
.clinical-insights {
    background-color: var(--surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.clinical-insights h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.insight-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    font-size: 0.875rem;
}

.insight-icon {
    font-size: 1rem;
    margin-top: 2px;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    background-color: var(--surface);
    margin: 10% auto;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 600px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    animation: modalFadeIn 0.3s ease-out;
}

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

.close {
    color: var(--text-secondary);
    float: right;
    font-size: 1.5rem;
    font-weight: 300;
    cursor: pointer;
    line-height: 1;
}

.close:hover {
    color: var(--text-primary);
}

/* Responsive Design */
@media (max-width: 1400px) {
    .main-container {
        grid-template-columns: 280px 1fr 280px;
    }
}

@media (max-width: 1200px) {
    .main-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .input-panel, .results-panel {
        max-height: none;
    }
    
    .threejs-container {
        height: 300px;
    }
}

@media (max-width: 768px) {
    .header-nav {
        flex-wrap: wrap;
    }
    
    .demo-buttons {
        grid-template-columns: 1fr;
    }
    
    .rom-values {
        grid-template-columns: 1fr;
    }
    
    .display-options {
        flex-wrap: wrap;
    }
}

/* Loading States */
.loading {
    position: relative;
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--primary-color);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Accessibility */
:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}