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

:root {
    /* Color Palette */
    --primary: #2A6EBB;
    --primary-light: #4A8BDD;
    --primary-dark: #1A4F8C;
    --secondary: #4CAF50;
    --secondary-light: #6FCF97;
    --secondary-dark: #2E7D32;
    --danger: #E53935;
    --warning: #FFB74D;
    --safe: #4CAF50;
    
    /* Neutrals */
    --white: #FFFFFF;
    --light-gray: #F8FAFC;
    --gray: #E2E8F0;
    --medium-gray: #CBD5E0;
    --dark-gray: #4A5568;
    --text: #2D3748;
    
    /* Backgrounds */
    --bg-light: #F7FAFC;
    --bg-blue: #EBF8FF;
    --bg-green: #F0FFF4;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--text);
    background-color: var(--bg-light);
    line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    line-height: 1.3;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* Header */
.header {
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    padding: var(--space-sm) 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo-container {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.logo-icon {
    background-color: var(--primary);
    color: var(--white);
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

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

.logo-tagline {
    font-size: 0.8rem;
    color: var(--dark-gray);
}

.nav ul {
    display: flex;
    list-style: none;
    gap: var(--space-lg);
}

.nav a {
    text-decoration: none;
    color: var(--dark-gray);
    font-weight: 500;
    padding: var(--space-xs) 0;
    position: relative;
    transition: color 0.2s;
}

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

.nav a.active {
    color: var(--primary);
}

.nav a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
    color: var(--white);
    padding: var(--space-xl) 0;
    text-align: center;
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

.hero p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto;
    opacity: 0.9;
}

/* Main Content */
.main-content {
    padding: var(--space-xl) 0;
}

.app-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

@media (max-width: 992px) {
    .app-container {
        grid-template-columns: 1fr;
    }
}

/* Sections */
.input-section, .result-section {
    background-color: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-md);
}

.section-header {
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--gray);
}

.section-header h3 {
    color: var(--primary);
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-xs);
}

.section-header p {
    color: var(--dark-gray);
}

/* Form Styles */
.medical-form {
    margin-bottom: var(--space-lg);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

@media (max-width: 576px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

.form-group {
    margin-bottom: var(--space-sm);
}

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

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

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

input, select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--medium-gray);
    border-radius: var(--radius-md);
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    transition: all 0.2s;
    background-color: var(--white);
}

input:focus, select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(42, 110, 187, 0.1);
}

.input-hint {
    font-size: 0.8rem;
    color: var(--dark-gray);
    margin-top: 0.25rem;
}

/* Slider */
.slider-container {
    margin-top: 0.5rem;
}

input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: linear-gradient(to right, var(--danger), var(--warning), var(--safe));
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    border: 3px solid var(--white);
    box-shadow: var(--shadow-sm);
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 0.5rem;
    font-size: 0.8rem;
    color: var(--dark-gray);
}

/* Buttons */
.form-actions {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
}

.btn {
    padding: 0.875rem 1.5rem;
    border-radius: var(--radius-md);
    border: none;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.2s;
}

.btn-primary {
    background-color: var(--primary);
    color: var(--white);
    flex: 1;
}

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

.btn-secondary {
    background-color: var(--light-gray);
    color: var(--dark-gray);
}

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

.btn-outline {
    background-color: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
}

.btn-outline:hover {
    background-color: rgba(42, 110, 187, 0.05);
}

/* Disclaimer */
.disclaimer {
    background-color: var(--bg-blue);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    font-size: 0.9rem;
    border-left: 4px solid var(--primary);
}

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

/* Result States */
.loading-state, .error-state, .initial-placeholder {
    text-align: center;
    padding: var(--space-xl);
}

.loading-spinner {
    margin-bottom: var(--space-lg);
}

.spinner {
    width: 60px;
    height: 60px;
    border: 5px solid var(--gray);
    border-top-color: var(--primary);
    border-radius: 50%;
    margin: 0 auto;
    animation: spin 1s linear infinite;
}

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

.error-icon {
    font-size: 3rem;
    color: var(--danger);
    margin-bottom: var(--space-md);
}

/* Result Card */
.result-card {
    animation: fadeIn 0.5s ease-out;
}

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

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: var(--space-md);
    margin-bottom: var(--space-md);
    border-bottom: 1px solid var(--gray);
}

.risk-badge {
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.2rem;
}

.risk-badge.low-risk {
    background-color: var(--bg-green);
    color: var(--secondary-dark);
}

.risk-badge.medium-risk {
    background-color: rgba(255, 183, 77, 0.2);
    color: #E65100;
}

.risk-badge.high-risk {
    background-color: rgba(229, 57, 53, 0.1);
    color: var(--danger);
}

.probability h4 {
    color: var(--dark-gray);
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.probability-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
}

.result-body h4 {
    color: var(--primary);
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.result-body h5 {
    color: var(--dark-gray);
    margin-top: var(--space-md);
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.risk-factors ul {
    list-style: none;
    padding-left: 0;
}

.risk-factors li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.risk-factors li:before {
    content: '•';
    color: var(--primary);
    position: absolute;
    left: 0;
    font-size: 1.5rem;
}

.recommendation-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-sm);
    margin-top: var(--space-sm);
}

@media (max-width: 768px) {
    .recommendation-cards {
        grid-template-columns: 1fr;
    }
}

.rec-card {
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    text-align: center;
    transition: transform 0.2s;
}

.rec-card:hover {
    transform: translateY(-5px);
}

.rec-card i {
    font-size: 1.5rem;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.rec-card h6 {
    margin-bottom: 0.25rem;
    color: var(--dark-gray);
}

.rec-card p {
    font-size: 0.85rem;
    color: var(--dark-gray);
}

.result-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--space-lg);
    padding-top: var(--space-md);
    border-top: 1px solid var(--gray);
    font-size: 0.9rem;
    color: var(--dark-gray);
}

/* Info Section */
.info-section {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

@media (max-width: 768px) {
    .info-section {
        grid-template-columns: 1fr;
    }
}

.info-card {
    background-color: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s;
}

.info-card:hover {
    transform: translateY(-5px);
}

.info-card i {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: var(--space-md);
}

.info-card h4 {
    margin-bottom: var(--space-sm);
    color: var(--primary);
}

/* Footer */
.footer {
    background-color: var(--primary-dark);
    color: var(--white);
    padding: var(--space-xl) 0 var(--space-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.footer-logo .logo-icon {
    background-color: rgba(255, 255, 255, 0.1);
}

.footer-logo h3 {
    font-size: 1.5rem;
}

.footer-links h4, .footer-contact h4 {
    margin-bottom: var(--space-md);
    font-size: 1.2rem;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--white);
}

.footer-contact p {
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    opacity: 0.9;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--space-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer-bottom p {
    opacity: 0.7;
    font-size: 0.9rem;
}

.footer-social {
    display: flex;
    gap: var(--space-sm);
}

.footer-social a {
    color: var(--white);
    font-size: 1.2rem;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.footer-social a:hover {
    opacity: 1;
}

/* Utility Classes */
.hidden {
    display: none !important;
}