/**
 * POSTURE ANALYSIS SYSTEM - STYLES
 * The Chiropractor - Amsterdam
 * Brand Guidelines 2024
 */

/* ============================================
   CSS VARIABLES (Brand Colors)
   ============================================ */
:root {
    /* Primary Colors */
    --color-sage: #CACCB7;
    --color-cream: #DED9CD;
    --color-charcoal: #1D1D1B;
    
    /* Secondary Colors */
    --color-muted: #999D8D;
    --color-warm: #C7BEB3;
    --color-light: #FAF9F8;
    
    /* Accent Colors */
    --color-forest: #2f4e43;
    --color-moss: #728878;
    
    /* Status Colors */
    --color-good: #2f4e43;
    --color-attention: #B8860B;
    --color-severe: #8B0000;
    
    /* Typography */
    --font-primary: 'Montserrat', 'Proxima Nova', 'Arial', sans-serif;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.15);
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-light);
    color: var(--color-charcoal);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ============================================
   HEADER
   ============================================ */
.app-header {
    background-color: white;
    padding: var(--spacing-lg) var(--spacing-xl);
    text-align: center;
    border-bottom: 1px solid var(--color-sage);
    box-shadow: var(--shadow-sm);
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 3px;
    color: var(--color-charcoal);
    margin-bottom: var(--spacing-xs);
}

.logo .tagline {
    font-size: 0.75rem;
    letter-spacing: 2px;
    color: var(--color-muted);
    text-transform: uppercase;
}

.page-title {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--color-forest);
    margin-top: var(--spacing-md);
}

/* ============================================
   MAIN CONTAINER
   ============================================ */
.app-container {
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    width: 100%;
}

/* ============================================
   PROGRESS BAR
   ============================================ */
.progress-bar {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xxl);
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.progress-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    opacity: 0.5;
    transition: opacity 0.3s ease;
}

.progress-step.active,
.progress-step.completed {
    opacity: 1;
}

.step-number {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: var(--color-cream);
    color: var(--color-charcoal);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    transition: all 0.3s ease;
}

.progress-step.active .step-number {
    background-color: var(--color-forest);
    color: white;
}

.progress-step.completed .step-number {
    background-color: var(--color-sage);
    color: var(--color-forest);
}

.step-label {
    font-size: 0.75rem;
    color: var(--color-muted);
    font-weight: 500;
}

.progress-step.active .step-label {
    color: var(--color-forest);
}

/* ============================================
   STEPS
   ============================================ */
.step {
    display: none;
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.step.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.step h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-charcoal);
    margin-bottom: var(--spacing-sm);
}

.step-description {
    color: var(--color-muted);
    margin-bottom: var(--spacing-xl);
}

/* ============================================
   FORMS
   ============================================ */
.patient-info-form {
    margin-bottom: var(--spacing-xl);
}

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

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-charcoal);
}

.form-group input {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-sage);
    border-radius: var(--radius-md);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-forest);
    box-shadow: 0 0 0 3px rgba(47, 78, 67, 0.1);
}

/* Gender selection radio buttons */
.gender-select {
    display: flex;
    gap: var(--spacing-md);
}

.radio-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    cursor: pointer;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--color-sage);
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}

.radio-label:hover {
    border-color: var(--color-forest);
    background-color: rgba(204, 204, 183, 0.1);
}

.radio-label input[type="radio"] {
    margin: 0;
    cursor: pointer;
}

.radio-label input[type="radio"]:checked + span {
    font-weight: 600;
}

.radio-label:has(input[type="radio"]:checked) {
    border-color: var(--color-forest);
    background-color: rgba(47, 78, 67, 0.1);
}

/* ============================================
   PATIENT SEARCH
   ============================================ */
.patient-search-container {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--color-light);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-sage);
}

.patient-search-container .form-group {
    position: relative;
    margin-bottom: 0;
}

.search-options {
    margin-top: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--color-charcoal);
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    cursor: pointer;
}

.checkbox-label:hover {
    color: var(--color-forest);
}

.search-loading {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    padding: var(--spacing-sm);
    background: white;
    border: 1px solid var(--color-sage);
    border-top: none;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    font-size: 0.875rem;
    color: var(--color-muted);
    z-index: 100;
}

.search-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    max-height: 300px;
    overflow-y: auto;
    background: white;
    border: 1px solid var(--color-sage);
    border-top: none;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    z-index: 100;
}

.search-result-item {
    padding: var(--spacing-md);
    cursor: pointer;
    border-bottom: 1px solid var(--color-light);
    transition: background-color 0.2s ease;
}

.search-result-item:hover {
    background-color: var(--color-light);
}

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

.search-result-name {
    font-weight: 500;
    color: var(--color-charcoal);
    margin-bottom: 2px;
}

.search-result-email {
    font-size: 0.875rem;
    color: var(--color-muted);
}

.search-result-dob {
    font-size: 0.75rem;
    color: var(--color-muted);
    margin-top: 2px;
}

.search-no-results,
.search-error {
    padding: var(--spacing-md);
    text-align: center;
    color: var(--color-muted);
    font-size: 0.875rem;
}

.search-error {
    color: #8B0000;
}

.selected-patient-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    background: white;
    border: 1px solid var(--color-forest);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-md);
}

.selected-patient-details {
    flex: 1;
}

.selected-patient-name {
    font-weight: 600;
    color: var(--color-forest);
    margin-bottom: 2px;
}

.selected-patient-email {
    font-size: 0.875rem;
    color: var(--color-muted);
}

.btn-clear-patient {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-muted);
    cursor: pointer;
    padding: 0 var(--spacing-sm);
    line-height: 1;
    transition: color 0.2s ease;
}

.btn-clear-patient:hover {
    color: #8B0000;
}

/* ============================================
   UPLOAD ZONES
   ============================================ */
.upload-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.upload-section h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-forest);
}

.upload-zone {
    border: 2px dashed var(--color-sage);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xxl);
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background-color: var(--color-light);
    position: relative;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.upload-zone:hover {
    border-color: var(--color-forest);
    background-color: rgba(202, 204, 183, 0.2);
}

.upload-zone.drag-over {
    border-color: var(--color-forest);
    background-color: rgba(47, 78, 67, 0.1);
    transform: scale(1.02);
}

.upload-zone.has-image {
    border-style: solid;
    padding: var(--spacing-md);
}

.upload-zone.has-image .upload-content {
    display: none;
}

.upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.upload-icon {
    width: 48px;
    height: 48px;
    color: var(--color-muted);
}

.upload-zone:hover .upload-icon {
    color: var(--color-forest);
}

.upload-content p {
    font-weight: 500;
    color: var(--color-charcoal);
}

.upload-hint {
    font-size: 0.75rem;
    color: var(--color-muted);
}

.preview-image {
    max-width: 100%;
    max-height: 300px;
    border-radius: var(--radius-md);
    object-fit: contain;
}

.upload-buttons {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    justify-content: center;
}

.btn-camera,
.btn-library {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    background-color: rgba(202, 204, 183, 0.2);
    color: var(--color-charcoal);
    font-family: var(--font-primary);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    user-select: none;
    -webkit-user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.btn-camera:hover,
.btn-library:hover {
    background-color: #C7BEB350;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.btn-camera:active,
.btn-library:active {
    transform: translateY(0);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

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

.btn-primary:hover {
    background-color: #264238;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

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

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

.btn-outline:hover {
    background-color: var(--color-forest);
    color: white;
}

.step-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-cream);
}

.report-actions {
    flex-wrap: wrap;
}

/* ============================================
   ANALYSIS PANELS (FULL SCREEN)
   ============================================ */

/* View Selector Tabs */
.view-selector {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    justify-content: center;
}

.view-tab {
    flex: 1;
    max-width: 300px;
    padding: var(--spacing-md) var(--spacing-lg);
    background: white;
    border: 2px solid var(--color-sage);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-charcoal);
}

.view-tab:hover {
    background-color: var(--color-light);
    border-color: var(--color-forest);
}

.view-tab.active {
    background-color: var(--color-forest);
    color: white;
    border-color: var(--color-forest);
}

.view-tab .tab-icon {
    font-size: 1.5rem;
}

/* Full Screen Analysis Container */
.fullscreen-analysis-container {
    position: relative;
    width: 100%;
    margin-bottom: var(--spacing-xl);
}

.analysis-fullscreen-panel {
    display: none;
    width: 100%;
}

.analysis-fullscreen-panel.active {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.canvas-wrapper {
    background-color: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 100%;
    overflow: hidden;
}

.canvas-wrapper canvas {
    display: block;
    max-width: min(100%, 90vw);
    max-height: min(600px, 60vh);
    height: auto;
    width: auto;
    object-fit: contain;
    border-radius: var(--radius-sm);
    touch-action: none; /* Prevent scrolling during landmark dragging on iPad */
}

/* Mobile phones (portrait) */
@media (max-width: 767px) {
    .canvas-wrapper canvas {
        max-width: 95vw;
        max-height: 50vh;
    }
}

/* Tablets (iPad Mini, iPad) - Portrait */
@media (min-width: 768px) and (max-width: 1024px) and (orientation: portrait) {
    .canvas-wrapper {
        padding: var(--spacing-sm);
    }

    .canvas-wrapper canvas {
        max-width: 85vw;
        max-height: 65vh;
    }

    .view-tab {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: 1rem;
    }

    .view-tab .tab-icon {
        font-size: 1.5rem;
    }
}

/* Tablets (iPad) - Landscape */
@media (min-width: 768px) and (max-width: 1024px) and (orientation: landscape) {
    .canvas-wrapper canvas {
        max-width: 60vw;
        max-height: 70vh;
    }
}

/* Large tablets (iPad Pro 11" and 12.9") - Portrait */
@media (min-width: 1025px) and (max-width: 1366px) and (orientation: portrait) {
    .canvas-wrapper canvas {
        max-width: 70vw;
        max-height: 65vh;
    }
}

/* Large tablets (iPad Pro) - Landscape */
@media (min-width: 1025px) and (max-width: 1366px) and (orientation: landscape) {
    .canvas-wrapper canvas {
        max-width: 50vw;
        max-height: 70vh;
    }
}

/* Desktop */
@media (min-width: 1367px) {
    .canvas-wrapper canvas {
        max-width: 800px;
        max-height: 600px;
    }
}

/* Old analysis-grid styles (kept for backwards compatibility) */
.analysis-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.analysis-panel {
    background-color: var(--color-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.analysis-panel h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-forest);
}

.canvas-container {
    background-color: white;
    border-radius: var(--radius-md);
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 300px;
    position: relative; /* For positioning helper bubble and zoom circle */
}

.canvas-container canvas {
    max-width: 100%;
    height: auto;
    cursor: default;
    user-select: none;
}

.canvas-container canvas:hover {
    cursor: grab;
}

.adjust-hint {
    font-size: 0.9rem;
    color: var(--color-forest);
    text-align: center;
    margin-top: var(--spacing-md);
    font-weight: 500;
    background-color: var(--color-light);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
}

/* ============================================
   LANDMARK ADJUSTMENT HELPERS
   ============================================ */

/* Helper bubble showing landmark placement instructions */
.landmark-helper-bubble {
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--color-forest) 0%, var(--color-moss) 100%);
    color: white;
    padding: 12px 20px;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 500;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    max-width: 80%;
    text-align: center;
    pointer-events: none;
    animation: fadeIn 0.2s ease-out;
}

/* Zoom circle showing magnified view */
.landmark-zoom-circle {
    position: absolute;
    pointer-events: none;
    z-index: 1001;
    border-radius: 50%;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
    animation: fadeIn 0.15s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateX(-50%) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) scale(1);
    }
}

/* ============================================
   SPINAL SEGMENTS
   ============================================ */
.spinal-segments {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.segment-region,
.spinal-region {
    background-color: white;
    border: 1px solid #e0e0e0;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.segment-region h4,
.spinal-region h5,
.region-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-forest);
    margin-bottom: var(--spacing-md);
    text-transform: capitalize;
}

.segment-checkboxes {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.segment-checkbox {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin: var(--spacing-xs);
    cursor: pointer;
}

.segment-checkbox input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--color-forest);
}

.segment-label {
    font-size: 0.875rem;
    font-weight: 500;
}

/* ============================================
   RESULTS
   ============================================ */
.results-container {
    display: grid;
    gap: var(--spacing-xl);
}

.results-section {
    background-color: var(--color-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.results-section h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-forest);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-sage);
}

/* Measurement Items */
.measurement-item {
    background: white;
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border-left: 4px solid var(--color-sage);
}

.measurement-item.status-good {
    border-left-color: var(--color-good);
}

.measurement-item.status-attention {
    border-left-color: var(--color-attention);
}

.measurement-item.status-severe {
    border-left-color: var(--color-severe);
}

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

.measurement-label {
    font-weight: 600;
    color: var(--color-charcoal);
}

.measurement-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-forest);
    margin-bottom: var(--spacing-xs);
}

.measurement-interpretation {
    font-size: 0.875rem;
    color: var(--color-muted);
    line-height: 1.5;
}

/* Interpretation Items */
.interpretation-item {
    background: white;
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.interpretation-item h5 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-charcoal);
    margin-bottom: var(--spacing-xs);
}

.severity-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-cream);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    margin-top: var(--spacing-sm);
}

/* Recommendations */
.recommendations-list {
    list-style: none;
}

.recommendations-list li {
    background: white;
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    display: flex;
    gap: var(--spacing-sm);
}

.recommendations-list li.priority-high {
    border-left: 4px solid var(--color-severe);
}

.recommendations-list li.priority-medium {
    border-left: 4px solid var(--color-attention);
}

.recommendations-list li.priority-low {
    border-left: 4px solid var(--color-sage);
}

.rec-category {
    font-weight: 600;
    color: var(--color-forest);
    white-space: nowrap;
}

/* Exercise Items */
.exercise-category {
    margin-bottom: var(--spacing-lg);
}

.exercise-category h5 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-forest);
    margin-bottom: var(--spacing-sm);
}

.exercise-item {
    background: white;
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.exercise-item strong {
    display: block;
    margin-bottom: var(--spacing-xs);
}

.exercise-item p {
    font-size: 0.875rem;
    color: var(--color-muted);
    margin-bottom: var(--spacing-xs);
}

.exercise-frequency {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-forest);
    background: var(--color-cream);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
}

/* ============================================
   FOOTER
   ============================================ */
.app-footer {
    text-align: center;
    padding: var(--spacing-lg);
    background: white;
    border-top: 1px solid var(--color-sage);
    margin-top: auto;
}

.app-footer p {
    font-size: 0.875rem;
    color: var(--color-muted);
}

.app-footer a {
    color: var(--color-forest);
    text-decoration: none;
}

.app-footer a:hover {
    text-decoration: underline;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
    .app-container {
        padding: var(--spacing-md);
    }
    
    .progress-bar {
        gap: var(--spacing-sm);
        padding: var(--spacing-md);
    }
    
    .step-label {
        display: none;
    }
    
    .step {
        padding: var(--spacing-lg);
    }
    
    .step h3 {
        font-size: 1.25rem;
    }
    
    .upload-grid {
        grid-template-columns: 1fr;
    }
    
    .step-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .analysis-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .logo h1 {
        font-size: 1.25rem;
        letter-spacing: 2px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .spinal-segments {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.hidden { display: none !important; }
.visible { display: block !important; }

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    .app-header,
    .progress-bar,
    .step-actions,
    .app-footer {
        display: none;
    }
    
    .step {
        display: block !important;
        box-shadow: none;
        padding: 0;
    }
    
    .results-section {
        break-inside: avoid;
        page-break-inside: avoid;
    }
}