/**
 * Healthy Blog One Pager - OPTIMIZED
 * Theme: Modern, Fast, Conversion-Optimized
 * Based on Open Design Best Practices
 * Version: 7.0
 */

/* ========================================
   DESIGN SYSTEM - Open Design Standards
   ======================================== */

:root {
    /* Primary Colors - Health & Wellness Focus */
    --color-primary: #1b4332;      /* Deep Forest Green */
    --color-primary-light: #2d6a4f; /* Medium Green */
    --color-primary-dark: #0d291f;  /* Darker Green */
    
    /* Secondary Colors - Fresh & Clean */
    --color-secondary: #52b788;    /* Fresh Mint */
    --color-secondary-light: #74c69d; /* Light Mint */
    --color-secondary-dark: #3d9a6f;  /* Darker Mint */
    
    /* Accent Colors - Call to Action */
    --color-accent: #f8b229;       /* Warm Yellow */
    --color-accent-hover: #e6a11c; /* Darker Yellow */
    
    /* Neutrals - Clean & Professional */
    --color-text: #2d2d2d;         /* Dark Gray */
    --color-text-light: #666666;   /* Medium Gray */
    --color-text-muted: #888888;   /* Light Gray */
    --color-border: #eaeaea;       /* Light Border */
    --color-bg-light: #f8f9fa;     /* Light Background */
    --color-bg-white: #ffffff;     /* Pure White */
    
    /* Typography */
    --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Spacing Scale - Open Design System */
    --space-1: 0.25rem;  /* 4px */
    --space-2: 0.5rem;   /* 8px */
    --space-3: 0.75rem;  /* 12px */
    --space-4: 1rem;     /* 16px */
    --space-5: 1.25rem;  /* 20px */
    --space-6: 1.5rem;   /* 24px */
    --space-8: 2rem;     /* 32px */
    --space-10: 2.5rem;  /* 40px */
    --space-12: 3rem;    /* 48px */
    --space-16: 4rem;    /* 64px */
    --space-20: 5rem;    /* 80px */
    --space-24: 6rem;    /* 96px */
    
    /* Border Radius - Modern & Soft */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    /* Shadows - Layered Depth */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transitions - Smooth & Professional */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
    
    /* Container - Optimized Widths */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1440px;
}

/* ========================================
   BASE - Open Design Reset
   ======================================== */

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg-white);
    overflow-x: hidden;
}

/* ========================================
   TYPOGRAPHY - Open Design System
   ======================================== */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-primary);
    margin-bottom: var(--space-4);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--space-5);
    line-height: 1.8;
}

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

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

/* ========================================
   LAYOUT - Open Design Grid
   ======================================== */

.container {
    width: 100%;
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.container-sm {
    max-width: var(--container-sm);
}

.container-md {
    max-width: var(--container-md);
}

.container-lg {
    max-width: var(--container-lg);
}

.section {
    padding: var(--space-20) 0;
}

.section-sm {
    padding: var(--space-12) 0;
}

.section-lg {
    padding: var(--space-24) 0;
}

/* ========================================
   HEADER - Modern Sticky
   ======================================== */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    padding: var(--space-4) 0;
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.site-header.scrolled {
    box-shadow: var(--shadow-md);
    padding: var(--space-3) 0;
}

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

.site-logo h2 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin: 0;
}

.main-navigation {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.main-navigation a {
    color: var(--color-primary);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: color var(--transition-fast);
    position: relative;
}

.main-navigation a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-secondary);
    transition: width var(--transition-base);
}

.main-navigation a:hover {
    color: var(--color-secondary);
}

.main-navigation a:hover::after {
    width: 100%;
}

/* Mobile Menu Button */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-primary);
    margin: 5px 0;
    transition: all var(--transition-fast);
}

/* ========================================
   HERO - Modern & Engaging
   ======================================== */

.hero-section {
    margin-top: 80px;
    padding: var(--space-24) 0 var(--space-20);
    background: linear-gradient(135deg, var(--color-bg-light) 0%, var(--color-bg-white) 100%);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(82, 183, 136, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    z-index: 0;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    background: var(--color-secondary-light);
    color: var(--color-primary);
    padding: var(--space-2) var(--space-4);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-6);
}

.hero-content h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-6);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content .subtitle {
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--color-text);
    margin-bottom: var(--space-8);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4) var(--space-8);
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    cursor: pointer;
    border: 2px solid transparent;
}

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

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

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

.btn-secondary:hover {
    background: var(--color-primary);
    color: var(--color-bg-white);
    transform: translateY(-2px);
}

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

.btn-accent:hover {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
}

/* ========================================
   BLOG SECTION - Modern Cards
   ======================================== */

.blog-section {
    padding: var(--space-24) 0;
    background: var(--color-bg-white);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-12);
}

.section-badge {
    display: inline-block;
    color: var(--color-secondary);
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: var(--space-3);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    letter-spacing: -1px;
    color: var(--color-primary);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-8);
}

.blog-card {
    background: var(--color-bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
    border: 1px solid var(--color-border);
}

.blog-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-secondary);
}

.blog-card-image {
    position: relative;
    width: 100%;
    height: 240px;
    overflow: hidden;
}

.blog-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.blog-card:hover .blog-card-image img {
    transform: scale(1.05);
}

.blog-card-badge {
    position: absolute;
    top: var(--space-4);
    left: var(--space-4);
    background: var(--color-accent);
    color: var(--color-primary);
    padding: var(--space-2) var(--space-3);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    border-radius: var(--radius-sm);
}

.blog-card-content {
    padding: var(--space-6);
}

.blog-card-meta {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-3);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.blog-card-meta .category {
    color: var(--color-secondary);
    font-weight: 600;
}

.blog-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-3);
    line-height: 1.4;
}

.blog-card h3 a {
    color: var(--color-primary);
}

.blog-card h3 a:hover {
    color: var(--color-secondary);
}

.blog-card-excerpt {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text);
    margin-bottom: var(--space-5);
}

.blog-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-border);
}

.read-more {
    color: var(--color-secondary);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.read-more::after {
    content: '→';
    transition: transform var(--transition-fast);
}

.blog-card:hover .read-more::after {
    transform: translateX(4px);
}

/* ========================================
   FEATURES SECTION - Modern Grid
   ======================================== */

.features-section {
    padding: var(--space-24) 0;
    background: var(--color-bg-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-8);
}

.feature-card {
    background: var(--color-bg-white);
    padding: var(--space-8);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-base);
    border: 1px solid var(--color-border);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-secondary);
}

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-5);
    background: linear-gradient(135deg, var(--color-secondary-light) 0%, var(--color-secondary) 100%);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--color-primary);
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-3);
}

.feature-card p {
    color: var(--color-text-light);
    font-size: 0.9375rem;
}

/* ========================================
   ABOUT SECTION - Modern Layout
   ======================================== */

.about-section {
    padding: var(--space-24) 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

.about-image {
    position: relative;
}

.about-image img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

.about-image::before {
    content: '';
    position: absolute;
    top: -20px;
    right: -20px;
    width: 100px;
    height: 100px;
    background: var(--color-secondary);
    border-radius: var(--radius-lg);
    opacity: 0.1;
}

.about-content {
    padding: var(--space-4);
}

.about-content .section-badge {
    margin-bottom: var(--space-4);
}

.about-content .section-title {
    margin-bottom: var(--space-6);
}

.about-content p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-text);
    margin-bottom: var(--space-5);
}

.about-content strong {
    color: var(--color-primary);
    font-weight: 700;
}

/* ========================================
   NEWSLETTER SECTION - High Conversion
   ======================================== */

.newsletter-section {
    padding: var(--space-24) 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    position: relative;
    overflow: hidden;
}

.newsletter-section::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 300px;
    height: 100%;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.newsletter-content {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
    text-align: center;
}

.newsletter-content h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: var(--space-4);
    color: var(--color-bg-white);
}

.newsletter-content p {
    font-size: 1.125rem;
    margin-bottom: var(--space-8);
    opacity: 0.9;
}

.newsletter-form {
    display: flex;
    gap: var(--space-3);
    max-width: 500px;
    margin: 0 auto;
}

.newsletter-form input {
    flex: 1;
    padding: var(--space-4) var(--space-5);
    border: 2px solid rgba(255, 255, 255, 0.2);
    font-size: 1rem;
    background: rgba(255, 255, 255, 0.95);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.newsletter-form input:focus {
    outline: none;
    border-color: var(--color-secondary);
    background: var(--color-bg-white);
}

.newsletter-form button {
    background: var(--color-accent);
    color: var(--color-primary);
    border: none;
    padding: var(--space-4) var(--space-8);
    font-size: 0.875rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.newsletter-form button:hover {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ========================================
   CONTACT SECTION - Modern Form
   ======================================== */

.contact-section {
    padding: var(--space-24) 0;
    background: var(--color-bg-light);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
}

.contact-info h2 {
    font-size: 2rem;
    margin-bottom: var(--space-6);
}

.contact-info p {
    color: var(--color-text-light);
    margin-bottom: var(--space-8);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.contact-item-icon {
    width: 48px;
    height: 48px;
    background: var(--color-secondary-light);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--color-primary);
}

.contact-item-text h4 {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.contact-item-text p {
    font-size: 1rem;
    margin: 0;
}

.contact-form {
    background: var(--color-bg-white);
    padding: var(--space-8);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: var(--space-5);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-2);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--space-4);
    border: 2px solid var(--color-border);
    font-size: 1rem;
    font-family: var(--font-body);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast);
    background: var(--color-bg-white);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-secondary);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

/* ========================================
   FOOTER - Modern Multi-Column
   ======================================== */

.site-footer {
    background: var(--color-primary);
    color: var(--color-bg-white);
    padding: var(--space-16) 0 var(--space-8);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-12);
    margin-bottom: var(--space-12);
}

.footer-brand h4 {
    font-size: 1.5rem;
    margin-bottom: var(--space-4);
}

.footer-brand p {
    font-size: 0.9375rem;
    opacity: 0.8;
    line-height: 1.8;
}

.footer-column h4 {
    font-size: 0.875rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    margin-bottom: var(--space-5);
    color: var(--color-bg-white);
}

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

.footer-column li {
    margin-bottom: var(--space-3);
}

.footer-column a {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9375rem;
    transition: all var(--transition-fast);
}

.footer-column a:hover {
    color: var(--color-bg-white);
    padding-left: 4px;
}

.social-links {
    display: flex;
    gap: var(--space-3);
    margin-top: var(--space-5);
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.social-links a:hover {
    background: var(--color-secondary);
    transform: translateY(-3px);
}

.footer-bottom {
    padding-top: var(--space-8);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.footer-bottom p {
    font-size: 0.875rem;
    opacity: 0.7;
    margin: 0;
}

.footer-legal {
    display: flex;
    gap: var(--space-6);
}

.footer-legal a {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-fast);
}

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

/* ========================================
   RESPONSIVE - Open Design Breakpoints
   ======================================== */

@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .main-navigation {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-bg-white);
        flex-direction: column;
        padding: var(--space-6);
        box-shadow: var(--shadow-lg);
    }
    
    .main-navigation.active {
        display: flex;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
    
    .newsletter-form button {
        width: 100%;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-brand p {
        margin: 0 auto;
    }
    
    .social-links {
        justify-content: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-legal {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    :root {
        --space-20: 3rem;
        --space-24: 4rem;
    }
    
    .blog-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   ACCESSIBILITY - Open Design Standards
   ======================================== */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus visible for keyboard navigation */
*:focus-visible {
    outline: 2px solid var(--color-secondary);
    outline-offset: 2px;
}

/* Skip to main content link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: var(--color-bg-white);
    padding: var(--space-3) var(--space-4);
    z-index: 9999;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 0;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --color-border: #000;
    }
    
    .btn {
        border-width: 3px;
    }
}