/* ========================================
   Diabetes Health Predictor - AI Doctor Portal
   Hospital-Style CSS Theme
   ======================================== */

/* ========================================
   ROOT VARIABLES & RESET
   ======================================== */
:root {
    /* Medical Theme Colors */
    --primary-color: #2563eb;          /* Teal/Cyan */
    --primary-dark: #1d4ed8;
    --primary-light: #22d3ee;
    --secondary-color: #3b82f6;        /* Soft Blue */
    --success-color: #10b981;          /* Green */
    --danger-color: #ef4444;           /* Red */
    --warning-color: #f59e0b;          /* Orange */
    
    /* Neutrals */
    --white: #ffffff;
    --light-bg: #f0f9ff;               /* Light blue tint */
    --card-bg: #ffffff;
    --text-dark: #1e293b;
    --text-gray: #64748b;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    
    /* Typography */
    --font-family: 'Inter', 'Poppins', sans-serif, sans-serif;
    --font-size-base: 16px;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

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

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-dark);
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    min-height: 100vh;
}

/* ========================================
   NAVBAR
   ======================================== */
.navbar {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    padding: var(--spacing-md) 0;
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.5rem;
    font-weight: 700;
}

.nav-brand i {
    font-size: 2rem;
    animation: pulse 2s infinite;
}

.dashboard-link {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    padding: 10px 20px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    backdrop-filter: blur(10px);
}

.dashboard-link:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.dashboard-link i {
    font-size: 1.1rem;
}

.nav-subtitle {
    font-size: 0.9rem;
    font-weight: 300;
    opacity: 0.95;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* ========================================
   CONTAINER & LAYOUT
   ======================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.main-container {
    padding: var(--spacing-xl) 0;
    min-height: calc(100vh - 200px);
}

/* ========================================
   HEADER SECTION
   ======================================== */
.header-section {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    position: relative;
}

/* Animated Logo Container */
.logo-container {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.logo-circle {
    position: relative;
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 30px rgba(8, 145, 178, 0.3);
    animation: float 3s ease-in-out infinite;
    z-index: 10;
}

.logo-icon {
    font-size: 3.5rem;
    color: var(--white);
    animation: heartbeat 1.5s infinite;
    z-index: 11;
}

/* Pulse Rings Animation */
.pulse-ring,
.pulse-ring-2 {
    position: absolute;
    width: 120px;
    height: 120px;
    border: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: pulse-ring 2s cubic-bezier(0.215, 0.61, 0.355, 1) infinite;
}

.pulse-ring-2 {
    animation-delay: 1s;
}

@keyframes pulse-ring {
    0% {
        transform: scale(1);
        opacity: 1;
    }
    100% {
        transform: scale(1.8);
        opacity: 0;
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-15px);
    }
}

@keyframes heartbeat {
    0%, 100% { 
        transform: scale(1); 
    }
    10%, 30% { 
        transform: scale(1.15); 
    }
    20%, 40% { 
        transform: scale(1); 
    }
}

.header-section h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 50%, var(--primary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradient-shift 3s ease infinite;
    background-size: 200% auto;
}

@keyframes gradient-shift {
    0%, 100% {
        background-position: 0% center;
    }
    50% {
        background-position: 100% center;
    }
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-gray);
    font-weight: 400;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.subtitle i {
    color: var(--primary-color);
    font-size: 1rem;
}

.developer-badge {
    display: inline-block;
    margin-top: var(--spacing-md);
    padding: 0.5rem 1.5rem;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border: 2px solid var(--primary-color);
    border-radius: 50px;
    color: var(--primary-dark);
    font-weight: 600;
    font-size: 0.9rem;
    box-shadow: var(--shadow-sm);
    animation: badge-glow 2s ease-in-out infinite;
}

.developer-badge i {
    color: var(--primary-color);
    margin-right: 0.5rem;
}

@keyframes badge-glow {
    0%, 100% {
        box-shadow: 0 0 5px rgba(8, 145, 178, 0.3);
    }
    50% {
        box-shadow: 0 0 20px rgba(8, 145, 178, 0.6);
    }
}

/* ========================================
   CARDS
   ======================================== */
.card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-lg);
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.card-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
}

.card-header i {
    font-size: 1.8rem;
}

.card-body {
    padding: var(--spacing-lg);
}

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

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: var(--spacing-xs);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-group label i {
    color: var(--primary-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: var(--font-family);
    font-size: 1rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(8, 145, 178, 0.1);
}

.form-group small {
    font-size: 0.85rem;
    color: var(--text-gray);
    margin-top: 0.25rem;
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

/* ========================================
   BUTTONS
   ======================================== */
.button-group {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--spacing-md);
}

.btn {
    padding: 0.875rem 2rem;
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition-fast);
    text-decoration: none;
    box-shadow: var(--shadow-sm);
}

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

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color) 0%, #059669 100%);
    color: var(--white);
}

.btn-success:hover {
    background: linear-gradient(135deg, #059669 0%, var(--success-color) 100%);
}

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

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

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

/* ========================================
   RESULTS SECTION
   ======================================== */
.result-container {
    text-align: center;
}

.result-badge {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-md);
}

.result-badge.high-risk {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    color: var(--danger-color);
    border: 2px solid var(--danger-color);
}

.result-badge.low-risk {
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
    color: var(--success-color);
    border: 2px solid var(--success-color);
}

.result-details {
    background: var(--light-bg);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin: var(--spacing-md) 0;
}

.result-row {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-color);
}

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

.result-row strong {
    color: var(--text-dark);
}

.confidence-badge {
    background: var(--primary-color);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    display: inline-block;
    margin: var(--spacing-sm) 0;
}

.recommendation {
    background: #fef3c7;
    border-left: 4px solid var(--warning-color);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    margin-top: var(--spacing-md);
    font-weight: 500;
}

.comparison-section {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    text-align: left;
}

.comparison-section h3 {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 0.5rem;
}

.comparison-subtitle {
    color: var(--text-gray);
    margin-bottom: var(--spacing-md);
}

.comparison-controls {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    background: var(--light-bg);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.comparison-controls select {
    width: 100%;
    min-height: 180px;
    padding: 0.75rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    font-family: var(--font-family);
    font-size: 0.95rem;
    background: var(--white);
}

.comparison-hint {
    font-size: 0.85rem;
    color: var(--text-gray);
}

.comparison-status {
    min-height: 1.2rem;
    font-size: 0.9rem;
    color: var(--text-gray);
}

.graph-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.graph-card {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.graph-card h4 {
    margin-bottom: 0.75rem;
    color: var(--text-dark);
}

.graph-card img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: var(--white);
}

.explanation-card {
    margin-top: var(--spacing-lg);
    background: linear-gradient(135deg, #e0f2fe 0%, #e7f5ff 100%);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    border: 1px solid var(--primary-light);
    box-shadow: var(--shadow-sm);
}

.explanation-card h4 {
    margin-bottom: 0.75rem;
    color: var(--primary-dark);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.explanation-text {
    color: var(--text-dark);
    line-height: 1.7;
    white-space: pre-line;
}

/* ========================================
   PATIENT SUMMARY
   ======================================== */
.patient-summary {
    background: linear-gradient(135deg, #e0f2fe 0%, #dbeafe 100%);
    border: 2px solid var(--primary-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.patient-summary h3 {
    color: var(--primary-dark);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.patient-summary-item {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem;
    background: var(--white);
    border-radius: var(--radius-sm);
}

.patient-summary-item strong {
    color: var(--text-dark);
}

/* ========================================
   MODAL
   ======================================== */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    animation: fadeIn var(--transition-fast);
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background: var(--white);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: slideUp 0.3s ease;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.modal-tab-bar {
    display: flex;
    gap: 0.5rem;
    margin-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.modal-tab {
    background: rgba(59, 130, 246, 0.12);
    border: none;
    border-radius: 999px;
    padding: 0.5rem 1.25rem;
    font-weight: 600;
    color: var(--primary-dark);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.modal-tab:hover {
    background: rgba(59, 130, 246, 0.2);
}

.modal-tab.active {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    box-shadow: var(--shadow-sm);
}

.comparison-heading {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 0.5rem;
}

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

.modal-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-size: 1.5rem;
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.close {
    font-size: 2rem;
    font-weight: 700;
    color: var(--white);
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.close:hover {
    transform: scale(1.2);
}

.modal-body {
    padding: var(--spacing-lg);
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
}

.report-content {
    font-family: 'Courier New', monospace;
    white-space: pre-wrap;
    background: var(--light-bg);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text-dark);
}

/* ========================================
   LOADING STATES
   ======================================== */
.loading-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.95);
    z-index: 3000;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.loading-overlay.show {
    display: flex;
}

.spinner {
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 60px;
    height: 60px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading {
    text-align: center;
    padding: var(--spacing-xl);
}

.loading i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.loading p {
    font-size: 1.1rem;
    color: var(--text-gray);
}

/* ========================================
   ANIMATIONS
   ======================================== */
.fade-in {
    animation: fadeInUp 0.6s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
    background: linear-gradient(135deg, var(--text-dark) 0%, #334155 100%);
    color: var(--white);
    text-align: center;
    padding: var(--spacing-lg) 0;
    margin-top: var(--spacing-xl);
}

.footer p {
    margin: 0.25rem 0;
    opacity: 0.9;
}

/* ========================================
   RESPONSIVE DESIGN - MOBILE FIRST
   ======================================== */

/* Tablet and below (768px) */
@media (max-width: 768px) {
    /* Typography scaling */
    .header-section h1 {
        font-size: 1.8rem;
        flex-direction: column;
        text-align: center;
    }
    
    .nav-brand {
        font-size: 1.2rem;
    }
    
    .nav-subtitle {
        font-size: 0.8rem;
    }
    
    .card-header h2 {
        font-size: 1.3rem;
    }
    
    /* Layout adjustments */
    .form-grid {
        grid-template-columns: 1fr !important;
        gap: var(--spacing-md);
    }
    
    .button-group {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
        min-height: 44px; /* Touch target size */
    }
    
    /* Modal optimizations */
    .modal-content {
        width: 95%;
        max-width: 95vw;
        margin: var(--spacing-sm);
        padding: var(--spacing-md);
    }
    
    /* Result displays */
    .result-row {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .result-card {
        margin-bottom: var(--spacing-md);
    }
    
    /* Navigation */
    .nav-links {
        flex-direction: column;
        gap: 0.5rem;
        width: 100%;
    }
    
    .nav-links .btn {
        width: 100%;
    }
    
    /* Tables - responsive card view */
    .table-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    table {
        display: block;
        width: 100%;
    }
    
    thead {
        display: none;
    }
    
    tbody {
        display: block;
    }
    
    tr {
        display: block;
        margin-bottom: var(--spacing-md);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        padding: var(--spacing-sm);
    }
    
    td {
        display: block;
        text-align: right;
        padding: 0.5rem !important;
        border: none;
        position: relative;
        padding-left: 50% !important;
    }
    
    td:before {
        content: attr(data-label);
        position: absolute;
        left: 0.5rem;
        width: 45%;
        text-align: left;
        font-weight: 600;
        color: var(--text-color);
    }
    
    /* Cards spacing */
    .card {
        margin-bottom: var(--spacing-md);
    }
    
    /* Form inputs */
    .form-group {
        margin-bottom: var(--spacing-md);
    }
    
    input, select, textarea {
        font-size: 16px; /* Prevent zoom on iOS */
    }
}

/* Mobile phones (480px and below) */
@media (max-width: 480px) {
    :root {
        --font-size-base: 14px;
        --spacing-xs: 0.25rem;
        --spacing-sm: 0.5rem;
        --spacing-md: 0.75rem;
        --spacing-lg: 1rem;
        --spacing-xl: 1.5rem;
    }
    
    .header-section h1 {
        font-size: 1.5rem;
    }
    
    .card {
        padding: var(--spacing-md);
    }
    
    .card-header h2 {
        font-size: 1.2rem;
    }
    
    /* Ensure touch targets are large enough */
    button, .btn, a.btn, input[type="submit"] {
        min-height: 44px;
        min-width: 44px;
        padding: 0.75rem 1rem;
    }
    
    /* Input fields for better mobile UX */
    input, select, textarea {
        font-size: 16px !important; /* Prevent iOS zoom */
        min-height: 44px;
        padding: 0.75rem;
    }
    
    /* Tighter spacing */
    .form-grid {
        gap: var(--spacing-sm);
    }
    
    .modal-content {
        width: 100%;
        max-width: 100vw;
        margin: 0;
        border-radius: 0;
        min-height: 100vh;
    }
}

/* Larger tablets (1024px and up) */
@media (min-width: 1024px) {
    .form-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .container {
        max-width: 1200px;
    }
}

/* Desktop (1280px and up) */
@media (min-width: 1280px) {
    .form-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .container {
        max-width: 1400px;
    }
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
    /* Larger tap targets for touch */
    .btn, button, a, input, select {
        min-height: 48px;
        min-width: 48px;
    }
    
    /* Remove hover effects on touch devices */
    .btn:hover, button:hover, a:hover {
        transform: none;
    }
    
    /* Add active state instead */
    .btn:active, button:active {
        transform: scale(0.98);
        opacity: 0.8;
    }
}

/* Print styles for medical reports */
@media print {
    .nav-section, .button-group, .modal-close, footer {
        display: none !important;
    }
    
    .card {
        page-break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ddd;
    }
    
    body {
        background: white;
    }
    
    .container {
        max-width: 100%;
    }
}

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

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

.hidden {
    display: none !important;
}

.visible {
    display: block !important;
}

/* ========================================
   DEVELOPER CREDIT (FOOTER)
   ======================================== */
.developer-credit {
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background: linear-gradient(135deg, rgba(8, 145, 178, 0.1) 0%, rgba(59, 130, 246, 0.1) 100%);
    border-top: 2px solid var(--primary-color);
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--primary-dark);
    display: inline-block;
}

.developer-credit i {
    color: var(--primary-color);
    margin-right: 0.5rem;
    animation: code-blink 2s ease-in-out infinite;
}

@keyframes code-blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}