/* --- Global Reset & Variables --- */
:root {
    --primary-color: #0066cc; /* Довіра, професіоналізм */
    --secondary-color: #2ecc71; /* Екологічність, безпека */
    --danger-color: #e74c3c; /* Небезпека, увага */
    --dark-text: #2c3e50;
    --light-bg: #f8f9fa;
    --white: #ffffff;
    --shadow: 0 10px 30px rgba(0,0,0,0.08);
    --radius: 12px;
    --font-main: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

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

body {
    font-family: var(--font-main);
    color: var(--dark-text);
    line-height: 1.6;
    background-color: var(--light-bg);
}

a { text-decoration: none; color: inherit; transition: 0.3s; }
ul { list-style: none; }

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

/* --- Header --- */
.main-header {
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo-box img {
    max-height: 60px;
    width: auto;
}

.main-nav a {
    margin-left: 20px;
    font-weight: 500;
    color: var(--dark-text);
}

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

.btn-call {
    background: var(--primary-color);
    color: var(--white) !important;
    padding: 10px 20px;
    border-radius: 50px;
    font-weight: bold;
}

.btn-call:hover { background: #0052a3; transform: translateY(-2px); }

/* --- Hero Section --- */
.hero-section {
    background: linear-gradient(135deg, #eef2f3 0%, #e0eafc 100%);
    padding: 80px 0;
    text-align: center;
}

.hero-section h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--dark-text);
}

.highlight {
    color: var(--primary-color);
    position: relative;
    display: inline-block;
}

.highlight::after {
    content: '';
    position: absolute;
    bottom: 5px;
    left: 0;
    width: 100%;
    height: 10px;
    background: rgba(0, 102, 204, 0.15);
    z-index: -1;
    border-radius: 4px;
}

.lead-text {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto;
    color: #555;
}

/* --- Comparison Section (The Core) --- */
.comparison-section {
    padding: 60px 0;
}

.section-title-wrapper {
    text-align: center;
    margin-bottom: 50px;
}

.section-title-wrapper h2 {
    font-size: 2rem;
    margin-bottom: 10px;
}

.comparison-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    align-items: stretch;
}

/* Cards Styles */
.chem-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-top: 5px solid transparent;
    display: flex;
    flex-direction: column;
}

.chem-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.12);
}

/* Ordinary Card (Left) */
.chem-card.ordinary {
    border-top-color: var(--danger-color);
    background: #fffafa; /* Ледь помітний червонуватий відтінок */
}

.chem-card.ordinary .badge {
    background: var(--danger-color);
    color: white;
}

.chem-card.ordinary .feature-list li::before {
    content: '❌';
    margin-right: 10px;
}

/* Certified Card (Right) */
.chem-card.certified {
    border-top-color: var(--secondary-color);
    background: #faffff; /* Ледь помітний зеленуватий відтінок */
    border: 2px solid #d4edda;
}

.chem-card.certified .badge {
    background: var(--secondary-color);
    color: white;
}

.chem-card.certified .feature-list li::before {
    content: '✅';
    margin-right: 10px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    border-bottom: 1px solid #eee;
    padding-bottom: 15px;
}

.card-header h3 {
    font-size: 1.4rem;
}

.badge {
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: bold;
    text-transform: uppercase;
}

.feature-list li {
    margin-bottom: 15px;
    font-size: 1rem;
    display: flex;
    align-items: flex-start;
}

.psychology-trigger {
    margin-top: auto;
    padding-top: 20px;
    font-style: italic;
    color: #666;
    border-top: 1px dashed #ccc;
    font-size: 0.95rem;
}

.psychology-trigger.success {
    color: var(--secondary-color);
    font-weight: 600;
    border-top-color: var(--secondary-color);
}

/* --- Brands Section --- */
.brands-section {
    background: var(--white);
    padding: 60px 0;
    text-align: center;
}

.brands-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.brand-item {
    padding: 20px;
    border: 1px solid #eee;
    border-radius: var(--radius);
    transition: 0.3s;
}

.brand-item:hover {
    border-color: var(--primary-color);
    background: #f0f7ff;
}

.brand-item h4 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

/* --- CTA Section --- */
.cta-section {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary-color), #004c99);
    color: var(--white);
    text-align: center;
}

.cta-box {
    max-width: 800px;
    margin: 0 auto;
}

.cta-box h2 {
    font-size: 2.2rem;
    margin-bottom: 20px;
}

.cta-buttons {
    margin-top: 30px;
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 15px 35px;
    border-radius: 50px;
    font-weight: bold;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--secondary-color);
    color: var(--white);
    box-shadow: 0 5px 15px rgba(46, 204, 113, 0.4);
}

.btn-primary:hover {
    background: #27ae60;
    transform: scale(1.05);
}

.btn-secondary {
    background: transparent;
    border: 2px solid var(--white);
    color: var(--white);
}

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

.small-note {
    margin-top: 20px;
    font-size: 0.9rem;
    opacity: 0.9;
}

/* --- Footer --- */
.main-footer {
    background: #1a252f;
    color: #bdc3c7;
    padding: 50px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    color: var(--white);
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.footer-col a {
    display: block;
    margin-bottom: 10px;
}

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

.copyright {
    text-align: center;
    border-top: 1px solid #34495e;
    padding-top: 20px;
    font-size: 0.9rem;
}

/* --- Responsive Design --- */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 15px;
    }
    
    .main-nav {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px;
    }
    
    .main-nav a { margin: 0 5px; }

    .hero-section h1 { font-size: 1.8rem; }
    
    .comparison-grid {
        grid-template-columns: 1fr; /* Стовпці один під одним на мобільному */
    }
    
    .chem-card {
        margin-bottom: 20px;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .btn { width: 100%; text-align: center; }
}