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

:root {
    --primary-color: #2c5aa0;
    --secondary-color: #4a90e2;
    --accent-color: #ff6b6b;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --error-color: #e74c3c;
    --text-color: #333;
    --text-light: #666;
    --bg-color: #ffffff;
    --bg-light: #f8f9fa;
    --border-color: #e9ecef;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.15);
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    background: var(--bg-color);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-logo a {
    font-size: 1.5rem;
    font-weight: bold;
    text-decoration: none;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
}

.nav-menu a:hover {
    color: var(--primary-color);
    background-color: var(--bg-light);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-color);
    margin: 3px 0;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* Calculator Section */
.calculator-section {
    padding: 4rem 0;
    background: var(--bg-light);
}

.calculator-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--primary-color);
}

.calculator-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 2rem;
    max-width: 600px;
    margin: 0 auto;
}

.calc-input-group {
    margin-bottom: 1.5rem;
}

.calc-input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-color);
}

.calc-input-group input {
    width: 100%;
    padding: 0.8rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

.calc-input-group input:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.calc-button {
    width: 100%;
    padding: 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 1rem;
}

.calc-button:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.result-container {
    margin-top: 2rem;
    padding: 1.5rem;
    background: var(--bg-light);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--primary-color);
}

.result-container h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Article Section */
.article-section {
    padding: 4rem 0;
}

.article-section h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: var(--primary-color);
}

.article-section h3 {
    font-size: 1.8rem;
    margin: 2rem 0 1rem 0;
    color: var(--primary-color);
}

.article-section p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.article-section ul, .article-section ol {
    margin-bottom: 1.5rem;
    padding-left: 2rem;
}

.article-section li {
    margin-bottom: 0.5rem;
}

.article-section a {
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 500;
}

.article-section a:hover {
    text-decoration: underline;
}

.article-section strong {
    color: var(--primary-color);
}

/* Tables */
.reference-table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.reference-table th {
    background: var(--primary-color);
    color: white;
    padding: 1rem;
    text-align: left;
    font-weight: 600;
}

.reference-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.reference-table tr:hover {
    background: var(--bg-light);
}

/* Blockquotes */
blockquote {
    border-left: 4px solid var(--secondary-color);
    padding: 1rem 1.5rem;
    margin: 2rem 0;
    background: var(--bg-light);
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    font-style: italic;
    color: var(--text-light);
}

/* Highlight Boxes */
.highlight-box {
    background: linear-gradient(135deg, #fff3cd, #ffeaa7);
    border: 1px solid #ffeaa7;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin: 2rem 0;
}

.highlight-box h4 {
    color: var(--warning-color);
    margin-bottom: 1rem;
}

/* Related Articles */
.related-articles {
    padding: 4rem 0;
    background: var(--bg-light);
}

.related-articles h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--primary-color);
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.article-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.article-card h3 {
    margin-bottom: 1rem;
}

.article-card a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.article-card a:hover {
    color: var(--secondary-color);
}

/* Sources */
.sources {
    margin-top: 3rem;
    padding: 2rem;
    background: var(--bg-light);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--primary-color);
}

.sources h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.sources ol {
    padding-left: 1.5rem;
}

.sources li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

/* Footer */
.footer {
    background: var(--text-color);
    color: white;
    padding: 3rem 0 1rem 0;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

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

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

.footer-section a {
    color: #ccc;
    text-decoration: none;
    transition: var(--transition);
}

.footer-section a:hover {
    color: var(--secondary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #555;
    color: #ccc;
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    z-index: 1000;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--secondary-color);
    transform: translateY(-3px);
}

/* GDPR Notification */
.gdpr-notification {
    position: fixed;
    bottom: 20px;
    left: 20px;
    background: var(--text-color);
    color: white;
    padding: 1rem;
    border-radius: var(--border-radius);
    max-width: 300px;
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: var(--transition);
}

.gdpr-notification.hidden {
    transform: translateY(100px);
    opacity: 0;
}

.gdpr-notification a {
    color: var(--secondary-color);
    text-decoration: none;
}

.gdpr-notification button {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    margin-top: 0.5rem;
    cursor: pointer;
    transition: var(--transition);
}

.gdpr-notification button:hover {
    background: var(--secondary-color);
}

/* Article Page Styles */
.article-page {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 0;
}

.article-header {
    text-align: center;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
}

.article-header h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.article-meta {
    font-size: 1.1rem;
    color: var(--text-light);
    font-style: italic;
}

.article-content {
    line-height: 1.8;
}

.related-articles-bottom {
    margin-top: 3rem;
    padding: 2rem;
    background: var(--bg-light);
    border-radius: var(--border-radius);
}

.related-articles-bottom h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.related-articles-bottom ul {
    list-style: none;
    padding: 0;
}

.related-articles-bottom li {
    margin-bottom: 0.5rem;
}

.related-articles-bottom a {
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 500;
}

.related-articles-bottom a:hover {
    text-decoration: underline;
}

/* Page Content Styles */
.page-content {
    padding: 2rem 0;
}

.page-header {
    text-align: center;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
}

.page-header h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.page-subtitle {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.last-updated {
    font-size: 0.9rem;
    color: var(--text-light);
    font-style: italic;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
}

.feature-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Values List */
.values-list {
    list-style: none;
    padding: 0;
}

.values-list li {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
    position: relative;
}

.values-list li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

/* Medical Disclaimer */
.medical-disclaimer {
    background: linear-gradient(135deg, #ffe6e6, #ffcccc);
    border: 1px solid #ffcccc;
    border-radius: var(--border-radius);
    padding: 2rem;
    margin: 2rem 0;
    border-left: 4px solid var(--error-color);
}

.medical-disclaimer h3 {
    color: var(--error-color);
    margin-bottom: 1rem;
}

/* Contact Page Styles */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin: 2rem 0;
}

.contact-card {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.contact-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.form-container {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

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

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin-right: 0.5rem;
}

.submit-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    align-self: flex-start;
}

.submit-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.form-message {
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-top: 1rem;
}

.form-message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.form-message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* FAQ Section */
.faq-section {
    margin: 3rem 0;
}

.faq-section h2 {
    color: var(--primary-color);
    margin-bottom: 2rem;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.faq-item {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.faq-item h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Privacy Policy Styles */
.privacy-content {
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.privacy-content h2 {
    color: var(--primary-color);
    margin: 2rem 0 1rem 0;
    font-size: 1.8rem;
}

.privacy-content h3 {
    color: var(--secondary-color);
    margin: 1.5rem 0 1rem 0;
    font-size: 1.4rem;
}

.cookie-table {
    overflow-x: auto;
    margin: 2rem 0;
}

.cookie-table table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.cookie-table th {
    background: var(--primary-color);
    color: white;
    padding: 1rem;
    text-align: left;
}

.cookie-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.contact-info {
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--primary-color);
    margin: 2rem 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow);
        padding: 2rem 0;
        gap: 1rem;
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(-45deg) translate(-5px, 6px);
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -6px);
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .calculator-section h2,
    .related-articles h2 {
        font-size: 2rem;
    }

    .article-header h1 {
        font-size: 2rem;
    }

    .page-header h1 {
        font-size: 2rem;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .gdpr-notification {
        left: 10px;
        right: 10px;
        max-width: none;
    }

    .back-to-top {
        bottom: 1rem;
        right: 1rem;
        width: 45px;
        height: 45px;
    }

    .container {
        padding: 0 15px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 2rem 0;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .calculator-section,
    .related-articles {
        padding: 2rem 0;
    }

    .calculator-card,
    .form-container,
    .contact-card {
        padding: 1.5rem;
    }

    .articles-grid {
        grid-template-columns: 1fr;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .faq-grid {
        grid-template-columns: 1fr;
    }

    .reference-table {
        font-size: 0.9rem;
    }

    .reference-table th,
    .reference-table td {
        padding: 0.5rem;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .footer,
    .back-to-top,
    .gdpr-notification {
        display: none !important;
    }

    .hero {
        background: none !important;
        color: var(--text-color) !important;
    }

    .article-section,
    .article-content {
        font-size: 12pt;
        line-height: 1.5;
    }

    .highlight-box {
        border: 2px solid var(--warning-color);
        background: none;
    }

    .medical-disclaimer {
        border: 2px solid var(--error-color);
        background: none;
    }

    a {
        color: var(--text-color) !important;
        text-decoration: underline;
    }
}