:root {
    --primary: #1a5276;
    --secondary: #2980b9;
    --accent: #e67e22;
    --light: #ecf0f1;
    --dark: #2c3e50;
    --white: #ffffff;
    --gray: #7f8c8d;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: #333; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Header */
header { background: var(--primary); color: var(--white); padding: 15px 0; position: sticky; top: 0; z-index: 100; box-shadow: 0 2px 10px rgba(0,0,0,0.3); }
header .container { display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 1.8em; font-weight: bold; color: var(--white); text-decoration: none; }
.logo span { color: var(--accent); }
nav a { color: var(--white); text-decoration: none; margin-left: 25px; font-weight: 500; transition: color 0.3s; }
nav a:hover { color: var(--accent); }

/* Hero */
.hero { background: linear-gradient(135deg, var(--primary), var(--secondary)); color: var(--white); padding: 80px 0; text-align: center; }
.hero h1 { font-size: 2.8em; margin-bottom: 20px; }
.hero p { font-size: 1.3em; max-width: 700px; margin: 0 auto 30px; opacity: 0.9; }
.hero .btn { display: inline-block; background: var(--accent); color: var(--white); padding: 15px 40px; border-radius: 5px; text-decoration: none; font-size: 1.1em; font-weight: bold; transition: background 0.3s; }
.hero .btn:hover { background: #d35400; }

/* Sections */
section { padding: 60px 0; }
section h2 { text-align: center; font-size: 2.2em; color: var(--primary); margin-bottom: 15px; }
section .subtitle { text-align: center; color: var(--gray); font-size: 1.1em; margin-bottom: 50px; }

/* Advantages */
.advantages { background: var(--light); }
.adv-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 30px; }
.adv-card { background: var(--white); padding: 30px; border-radius: 10px; text-align: center; box-shadow: 0 3px 15px rgba(0,0,0,0.08); transition: transform 0.3s; }
.adv-card:hover { transform: translateY(-5px); }
.adv-card .num { font-size: 2.5em; font-weight: bold; color: var(--accent); margin-bottom: 10px; }
.adv-card h3 { color: var(--primary); margin-bottom: 15px; }
.adv-card p { color: var(--gray); font-size: 0.95em; }

/* Products */
.product-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 25px; }
.product-card { background: var(--white); border-radius: 10px; overflow: hidden; box-shadow: 0 3px 15px rgba(0,0,0,0.08); transition: transform 0.3s; }
.product-card:hover { transform: translateY(-3px); }
.product-card .card-body { padding: 20px; }
.product-card h3 { color: var(--primary); margin-bottom: 10px; }
.product-card p { color: var(--gray); font-size: 0.9em; margin-bottom: 15px; }
.product-card .tag { display: inline-block; background: var(--secondary); color: var(--white); padding: 3px 10px; border-radius: 15px; font-size: 0.8em; margin-right: 5px; }

/* Products category page */
.prod-table { width: 100%; border-collapse: collapse; margin-top: 20px; }
.prod-table th, .prod-table td { padding: 12px 15px; text-align: left; border-bottom: 1px solid #ddd; }
.prod-table th { background: var(--primary); color: var(--white); }
.prod-table tr:hover { background: var(--light); }

/* About */
.about-content { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.about-content p { margin-bottom: 15px; color: #555; }
.about-highlights { list-style: none; }
.about-highlights li { padding: 8px 0; padding-left: 25px; position: relative; }
.about-highlights li:before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: bold; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-info { background: var(--light); padding: 30px; border-radius: 10px; }
.contact-info h3 { color: var(--primary); margin-bottom: 20px; }
.contact-info p { margin-bottom: 12px; }
.contact-info strong { color: var(--primary); }

/* Footer */
footer { background: var(--dark); color: var(--white); padding: 40px 0 20px; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 30px; margin-bottom: 30px; }
.footer-col h4 { color: var(--accent); margin-bottom: 15px; }
.footer-col a { color: #bdc3c7; text-decoration: none; display: block; margin-bottom: 8px; transition: color 0.3s; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom { text-align: center; padding-top: 20px; border-top: 1px solid #3d566e; color: var(--gray); font-size: 0.9em; }

/* CTA */
.cta { background: linear-gradient(135deg, var(--accent), #d35400); color: var(--white); text-align: center; padding: 60px 0; }
.cta h2 { color: var(--white); }
.cta p { max-width: 600px; margin: 0 auto 30px; font-size: 1.1em; }
.cta .btn { display: inline-block; background: var(--white); color: var(--accent); padding: 15px 40px; border-radius: 5px; text-decoration: none; font-weight: bold; }

/* Article */
.article-content { max-width: 800px; margin: 0 auto; }
.article-content h3 { color: var(--primary); margin: 25px 0 15px; }
.article-content p { margin-bottom: 15px; color: #555; }
.article-content ul { margin: 15px 0; padding-left: 25px; }
.article-content li { margin-bottom: 8px; color: #555; }

@media (max-width: 768px) {
    .about-content, .contact-grid { grid-template-columns: 1fr; }
    .hero h1 { font-size: 2em; }
    nav { display: none; }
}