/* ============================================
   PlantarCare - Professional Medical Aesthetic
   ============================================ */

/* CSS Variables */
:root {
    --primary-blue: #1e5a8e;
    --primary-blue-dark: #164270;
    --primary-blue-light: #2874b5;
    --accent-blue: #4a9fd8;
    --text-dark: #2c3e50;
    --text-medium: #5a6c7d;
    --text-light: #8094a8;
    --bg-white: #ffffff;
    --bg-gray-light: #f8f9fb;
    --bg-gray: #e8ecf1;
    --border-color: #d4dce5;
    --success-green: #28a745;
    --warning-orange: #ff9800;
    
    --font-display: 'Playfair Display', serif;
    --font-body: 'Libre Franklin', sans-serif;
    
    --shadow-sm: 0 2px 8px rgba(30, 90, 142, 0.08);
    --shadow-md: 0 4px 16px rgba(30, 90, 142, 0.12);
    --shadow-lg: 0 8px 32px rgba(30, 90, 142, 0.16);
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 17px;
    line-height: 1.7;
    color: var(--text-dark);
    background-color: var(--bg-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-dark);
    margin-bottom: 16px;
}

h1 {
    font-size: 3.5rem;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 2.5rem;
    letter-spacing: -0.01em;
}

h3 {
    font-size: 1.75rem;
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: 16px;
    color: var(--text-medium);
}

a {
    text-decoration: none;
    color: var(--primary-blue);
    transition: var(--transition);
}

a:hover {
    color: var(--primary-blue-dark);
}

/* Navigation */
.navbar {
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    font-family: var(--font-display);
    transition: var(--transition);
}

.logo:hover {
    transform: translateY(-2px);
}

.logo-icon {
    font-size: 2rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
    align-items: center;
}

.nav-links a {
    color: var(--text-medium);
    font-weight: 500;
    font-size: 0.95rem;
    letter-spacing: 0.01em;
    padding: 8px 16px;
    border-radius: 6px;
    transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-blue);
    background: var(--bg-gray-light);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
    color: white;
    padding: 120px 0 100px;
    position: relative;
    overflow: hidden;
}

.hero-decoration {
    position: absolute;
    bottom: -100px;
    right: -100px;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero-content {
    max-width: 700px;
    position: relative;
    z-index: 1;
    animation: fadeInUp 0.8s ease-out;
}

.hero-title {
    font-size: 4rem;
    color: white;
    margin-bottom: 24px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 32px;
    line-height: 1.6;
    font-weight: 300;
}

/* Buttons */
.btn-primary,
.btn-secondary {
    display: inline-block;
    padding: 16px 36px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    transition: var(--transition);
    text-align: center;
    cursor: pointer;
    border: none;
    font-family: var(--font-body);
    letter-spacing: 0.02em;
}

.btn-primary {
    background: white;
    color: var(--primary-blue);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary {
    background: var(--primary-blue);
    color: white;
    box-shadow: var(--shadow-md);
}

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

/* Introduction Section */
.intro-section {
    padding: 80px 0;
    background: var(--bg-white);
}

.intro-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.intro-content h2 {
    color: var(--primary-blue);
    margin-bottom: 32px;
}

.intro-content p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 24px;
}

.disclaimer-note {
    background: var(--bg-gray-light);
    border-left: 4px solid var(--warning-orange);
    padding: 20px 24px;
    border-radius: 6px;
    font-size: 0.95rem;
    color: var(--text-medium);
    margin-top: 32px;
    font-style: italic;
}

/* Featured Section */
.featured-section {
    padding: 80px 0;
    background: var(--bg-gray-light);
}

.section-title {
    text-align: center;
    color: var(--primary-blue);
    margin-bottom: 56px;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 32px;
}

.article-card {
    background: white;
    padding: 36px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.article-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-blue);
}

.article-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    filter: grayscale(20%);
}

.article-card h3 {
    color: var(--primary-blue);
    margin-bottom: 16px;
    font-size: 1.4rem;
}

.article-card p {
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: 20px;
}

.article-link {
    color: var(--primary-blue);
    font-weight: 600;
    font-size: 0.95rem;
    letter-spacing: 0.02em;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.article-link:hover {
    gap: 10px;
}

/* CTA Section */
.cta-section {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--primary-blue-dark) 0%, var(--primary-blue) 100%);
    color: white;
    text-align: center;
}

.cta-content h2 {
    color: white;
    margin-bottom: 24px;
    font-size: 2.5rem;
}

.cta-content p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 36px;
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: rgba(255, 255, 255, 0.8);
    padding: 60px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 48px;
    margin-bottom: 48px;
}

.footer-section h4 {
    color: white;
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
    line-height: 1.7;
}

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

.footer-section ul li {
    margin-bottom: 12px;
}

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
    transition: var(--transition);
}

.footer-section ul li a:hover {
    color: white;
    padding-left: 4px;
}

.footer-disclaimer {
    background: rgba(255, 255, 255, 0.05);
    padding: 16px;
    border-radius: 6px;
    border-left: 3px solid var(--warning-orange);
    font-size: 0.85rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

/* Blog Page Specific Styles */
.page-header {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
    color: white;
    padding: 80px 0 60px;
    text-align: center;
}

.page-header h1 {
    color: white;
    margin-bottom: 16px;
}

.page-header p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 32px;
    padding: 80px 0;
}

.blog-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.blog-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.blog-card-header {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--primary-blue) 100%);
    padding: 40px 24px;
    text-align: center;
}

.blog-card-icon {
    font-size: 4rem;
    margin-bottom: 12px;
}

.blog-card-content {
    padding: 28px;
}

.blog-card h3 {
    color: var(--primary-blue);
    margin-bottom: 16px;
    font-size: 1.4rem;
}

.blog-meta {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 16px;
}

.blog-excerpt {
    color: var(--text-medium);
    line-height: 1.7;
    margin-bottom: 20px;
}

.read-more {
    color: var(--primary-blue);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.read-more:hover {
    gap: 10px;
}

/* Blog Post Page */
.post-header {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
    color: white;
    padding: 100px 0 60px;
}

.post-header h1 {
    color: white;
    max-width: 800px;
    margin-bottom: 24px;
}

.post-meta {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1rem;
}

.post-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 80px 24px;
}

.post-content h2 {
    color: var(--primary-blue);
    margin-top: 48px;
    margin-bottom: 24px;
}

.post-content h3 {
    color: var(--primary-blue-dark);
    margin-top: 36px;
    margin-bottom: 16px;
}

.post-content p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 24px;
}

.post-content ul,
.post-content ol {
    margin-bottom: 24px;
    padding-left: 32px;
}

.post-content li {
    margin-bottom: 12px;
    color: var(--text-medium);
    line-height: 1.7;
}

.info-box {
    background: var(--bg-gray-light);
    border-left: 4px solid var(--primary-blue);
    padding: 24px;
    margin: 32px 0;
    border-radius: 6px;
}

.info-box h4 {
    color: var(--primary-blue);
    margin-bottom: 12px;
}

.warning-box {
    background: #fff8e1;
    border-left: 4px solid var(--warning-orange);
    padding: 24px;
    margin: 32px 0;
    border-radius: 6px;
}

.warning-box h4 {
    color: var(--warning-orange);
    margin-bottom: 12px;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero {
        padding: 80px 0 60px;
    }
    
    .nav-links {
        gap: 16px;
    }
    
    .nav-links a {
        padding: 6px 12px;
        font-size: 0.9rem;
    }
    
    .articles-grid,
    .blog-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .post-content h2 {
        margin-top: 36px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .btn-primary,
    .btn-secondary {
        padding: 14px 28px;
        font-size: 0.95rem;
    }
}