:root {
    --primary: #0284c7;
    --primary-dark: #0369a1;
    --accent: #10b981;
    --text-main: #334155;
    --text-muted: #64748b;
    --bg-main: #f8fafc;
    --border: #e2e8f0;
    --white: #ffffff;
}

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

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-main);
    background-color: var(--bg-main);
    line-height: 1.6;
}

a { text-decoration: none; color: inherit; transition: color 0.3s ease; }

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

/* Header */
.header {
    background: var(--white);
    box-shadow: 0 4px 20px rgba(0,0,0,0.03);
    position: sticky;
    top: 0;
    z-index: 100;
}
.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}
.logo {
    display: flex;
    align-items: center;
    font-size: 26px;
    font-weight: 700;
    color: var(--primary);
}
.main-nav ul {
    list-style: none;
    display: flex;
    gap: 30px;
}
.main-nav a {
    font-weight: 500;
    font-size: 15px;
    color: #475569;
}
.main-nav a:hover {
    color: var(--primary);
}

/* Article Styles */
.article-content h2 { margin: 40px 0 20px; color: #0f172a; font-size: 28px; }
.article-content p { margin-bottom: 15px; font-size: 16px; color: #334155; }
.article-content ul { margin-left: 20px; margin-bottom: 20px; font-size: 16px; }
.article-content .warning-text { color: #dc2626; font-weight: 600; }

/* Grids */
.tiles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}
.tile {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.tile:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.08) !important;
}

/* Footer */
.footer {
    background: #0f172a;
    color: #94a3b8;
    padding: 80px 0 30px;
    margin-top: 80px;
}
.footer-container {
    display: flex;
    justify-content: space-between;
    gap: 40px;
    margin-bottom: 40px;
}
.footer-info h3 { color: var(--white); margin-bottom: 15px; font-size: 22px; }
.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.footer-links a:hover { color: var(--white); text-decoration: underline; }
.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #1e293b;
    font-size: 14px;
}

/* Mobile responsive */
.mobile-toggle { display: none; background: none; border: none; font-size: 32px; cursor: pointer; color: var(--primary); padding: 5px; }

@media(max-width: 992px) {
    .main-nav { 
        display: none; 
        width: 100%; 
        position: absolute; 
        top: 80px; 
        left: 0; 
        background: var(--white); 
        box-shadow: 0 15px 30px rgba(0,0,0,0.1); 
        border-top: 1px solid #f1f5f9;
    }
    .main-nav.active { display: block; }
    .main-nav ul { flex-direction: column; padding: 25px; gap: 20px; }
    .main-nav a { font-size: 18px; }
    .mobile-toggle { display: block; }
    .hero-container { flex-direction: column; text-align: center; }
    .hero-image { margin-top: 40px; }
    .footer-container { flex-direction: column; text-align: center; }
}

@media(max-width: 768px) {
    .container { padding: 0 15px; }
    .article-body { padding: 25px !important; }
    .article-body h1 { font-size: 28px !important; line-height: 1.3; }
    .article-body h2 { font-size: 24px !important; }
    .tiles-grid { grid-template-columns: 1fr; }
    .footer-container { gap: 25px; }
}

@media(max-width: 480px) {
    .logo-text { font-size: 20px; }
    .header-container { height: 70px; }
    .main-nav { top: 70px; }
    .article-body { padding: 15px !important; margin: 20px 0 !important; border-radius: 8px !important; }
    .article-body h1 { font-size: 24px !important; }
    .article-body h2 { font-size: 20px !important; margin-top: 25px !important; }
    .article-body p, .article-body li, .article-body td { font-size: 15px !important; }
    .footer { padding: 50px 0 20px; }
    .footer-info h3 { font-size: 20px; }
}