/* 
 * Biological Age Calculator Styles
 * BioAgeHub.com
 */

/* ===== Variables ===== */
:root {
    /* Brand Colors */
    --primary-green: #8AB86E;
    --secondary-gray: #808080;
    --white: #FFFFFF;
    --dark-gray: #333333;
    --accent-blue: #4A90E2;
    --success-green: #5CB85C;
    --warning-red: #D9534F;
    
    /* UI Colors */
    --light-gray: #E0E0E0;
    --lighter-gray: #F5F5F5;
    --border-color: #CCCCCC;
    --placeholder-color: #AAAAAA;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Border Radius */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 2px 10px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
}

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

body {
    font-family: 'Open Sans', sans-serif;
    font-size: 16px;
    line-height: 1.5;
    color: var(--dark-gray);
    background-color: var(--lighter-gray);
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Montserrat', sans-serif;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

h1 {
    font-size: 28px;
    font-weight: 700;
}

h2 {
    font-size: 24px;
    font-weight: 600;
    margin-top: var(--spacing-xl);
}

h3 {
    font-size: 20px;
    font-weight: 600;
}

p {
    margin-bottom: var(--spacing-md);
}

img {
    max-width: 100%;
    height: auto;
}

/* ===== Container Styles ===== */
.calculator-container {
    max-width: 1200px;
    margin: 0 auto;
    background-color: var(--white);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.calculator-header {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--light-gray);
    display: flex;
    align-items: center;
}

.logo {
    max-width: 200px;
}

.calculator-section {
    padding: var(--spacing-lg);
    display: none;
}

.calculator-section.active {
    display: block;
}

/* ===== Introduction Section ===== */
.intro-text {
    font-size: 18px;
    max-width: 800px;
    margin-bottom: var(--spacing-xl);
}

/* ===== Questionnaire Section ===== */
.progress-container {
    margin-bottom: var(--spacing-xl);
}

.progress-bar {
    height: 8px;
    background-color: var(--light-gray);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: var(--spacing-xs);
}

.progress-fill {
    height: 100%;
    background-color: var(--primary-green);
    transition: width var(--transition-normal);
}

.progress-text {
    font-size: 14px;
    font-weight: 600;
    color: var(--secondary-gray);
    text-align: right;
}

.question-card {
    background-color: var(--white);
    border: 1px solid var(--light-gray);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.question-title {
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.question-options {
    margin-bottom: var(--spacing-md);
}

.radio-option, .checkbox-option {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.radio-option input, .checkbox-option input {
    margin-right: var(--spacing-sm);
}

.slider-container {
    margin: var(--spacing-md) 0;
}

.slider-input {
    width: 100%;
    -webkit-appearance: none;
    height: 6px;
    background: var(--light-gray);
    border-radius: 3px;
    outline: none;
    margin: var(--spacing-md) 0;
}

.slider-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-green);
    cursor: pointer;
    border: 2px solid var(--white);
    box-shadow: 0 0 2px rgba(0, 0, 0, 0.3);
}

.slider-input::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-green);
    cursor: pointer;
    border: 2px solid var(--white);
    box-shadow: 0 0 2px rgba(0, 0, 0, 0.3);
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    font-size: 14px;
    color: var(--secondary-gray);
}

.navigation-buttons {
    display: flex;
    justify-content: space-between;
    margin-top: var(--spacing-xl);
}

/* ===== Results Section ===== */
.results-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.gauge-container {
    flex: 1;
    min-width: 250px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.gauge {
    position: relative;
    width: 250px;
    height: 250px;
}

.gauge-value {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

#biological-age {
    display: block;
    font-family: 'Montserrat', sans-serif;
    font-size: 36px;
    font-weight: 700;
    color: var(--dark-gray);
}

.gauge-label {
    display: block;
    font-size: 16px;
    color: var(--secondary-gray);
}

.comparison-container {
    flex: 1;
    min-width: 250px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.chronological-age {
    margin-bottom: var(--spacing-md);
}

.chronological-age span:first-child {
    display: block;
    font-size: 18px;
    color: var(--secondary-gray);
}

.age-value {
    display: block;
    font-family: 'Montserrat', sans-serif;
    font-size: 28px;
    font-weight: 600;
    color: var(--dark-gray);
}

.age-difference {
    font-size: 18px;
    font-weight: 600;
}

.category-breakdown {
    margin-bottom: var(--spacing-xl);
}

.category-bar {
    margin-bottom: var(--spacing-md);
}

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

.category-name {
    font-weight: 600;
}

.category-impact {
    font-size: 14px;
}

.bar-container {
    height: 12px;
    background-color: var(--light-gray);
    border-radius: 6px;
    overflow: hidden;
    position: relative;
}

.bar-fill {
    height: 100%;
    position: absolute;
    left: 50%;
    transition: width var(--transition-slow);
}

.bar-fill.positive {
    background-color: var(--success-green);
}

.bar-fill.negative {
    background-color: var(--warning-red);
    transform: translateX(-100%);
}

.bar-fill.neutral {
    background-color: var(--secondary-gray);
    width: 4px !important;
    left: 50%;
    transform: translateX(-50%);
}

.email-capture {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

#email-input {
    flex: 1;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 16px;
}

#email-input:focus {
    border-color: var(--primary-green);
    outline: none;
    box-shadow: 0 0 0 2px rgba(138, 184, 110, 0.2);
}

#recalculate {
    margin-top: var(--spacing-md);
}

/* ===== Information Section ===== */
.info-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.info-card {
    background-color: var(--white);
    border: 1px solid var(--light-gray);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.info-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--spacing-sm);
}

.info-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.disclaimer {
    background-color: var(--lighter-gray);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-md);
    margin-top: var(--spacing-xl);
    font-size: 14px;
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    font-family: 'Open Sans', sans-serif;
    font-size: 16px;
    font-weight: 600;
    padding: 12px 24px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    text-align: center;
}

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

.btn-primary:hover {
    background-color: #7AA55F;
}

.btn-primary:active {
    background-color: #6A9450;
}

.btn-secondary {
    background-color: var(--white);
    color: var(--primary-green);
    border: 1px solid var(--primary-green);
}

.btn-secondary:hover {
    background-color: #F5F9F2;
}

.btn-secondary:active {
    background-color: #EBF2E5;
}

/* ===== Responsive Styles ===== */
@media (max-width: 768px) {
    .calculator-section {
        padding: var(--spacing-md);
    }
    
    .results-container {
        flex-direction: column;
    }
    
    .email-capture {
        flex-direction: column;
    }
    
    .navigation-buttons {
        flex-direction: column-reverse;
        gap: var(--spacing-md);
    }
    
    .btn {
        width: 100%;
    }
    
    h1 {
        font-size: 24px;
    }
    
    h2 {
        font-size: 20px;
    }
    
    .intro-text {
        font-size: 16px;
    }
}

/* ===== Animations ===== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.fade-in {
    animation: fadeIn var(--transition-normal);
}

/* ===== Utility Classes ===== */
.text-success {
    color: var(--success-green);
}

.text-warning {
    color: var(--warning-red);
}

.text-neutral {
    color: var(--secondary-gray);
}

.hidden {
    display: none;
}

.text-center {
    text-align: center;
}

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

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