/* style.css - Melamine Theme */
:root {
    --primary: #0056b3; /* Deep Chemical Blue */
    --secondary: #17a2b8; /* Cyan/Teal Accent */
    --dark: #343a40;
    --light: #f8f9fa;
    --white: #ffffff;
}

body { margin: 0; font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; color: var(--dark); line-height: 1.6; background-color: var(--light); }
a { text-decoration: none; color: inherit; transition: 0.3s; }
ul { list-style: none; padding: 0; }

/* Header & Nav */
header { background: var(--white); box-shadow: 0 2px 10px rgba(0,0,0,0.1); padding: 15px 0; position: sticky; top: 0; z-index: 1000; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
.nav-bar { display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 1.5rem; font-weight: 700; color: var(--primary); text-transform: uppercase; }
.nav-links a { margin-left: 25px; font-weight: 600; color: var(--dark); }
.nav-links a:hover, .nav-links a.active { color: var(--primary); }

/* Buttons */
.btn { display: inline-block; padding: 12px 30px; background: var(--primary); color: var(--white); border-radius: 4px; font-weight: bold; }
.btn:hover { background: #004494; }
.btn-outline { background: transparent; border: 2px solid var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: var(--white); }

/* Hero Section */
.hero { 
    /* Placeholder image representing chemical lab or white powder production */
    background: linear-gradient(rgba(0,86,179,0.8), rgba(0,86,179,0.6)), url('https://images.unsplash.com/photo-1625153884393-1a4d82614205?auto=format&fit=crop&w=1950&q=80'); 
    background-size: cover; 
    background-position: center; 
    color: var(--white); 
    padding: 120px 20px; 
    text-align: center; 
}
.hero h1 { font-size: 3.5rem; margin: 0 0 20px 0; }
.hero p { font-size: 1.25rem; max-width: 700px; margin: 0 auto 30px auto; opacity: 0.9; }

/* Page Titles */
.page-title { background: var(--primary); color: var(--white); padding: 60px 0; text-align: center; margin-bottom: 40px; }
.page-title h1 { margin: 0; }

/* Sections */
.section { padding: 60px 0; }
.bg-white { background: var(--white); }

/* Grid Layouts */
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(400px, 1fr)); gap: 40px; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }

/* Cards */
.card { background: var(--white); padding: 30px; border-radius: 8px; box-shadow: 0 5px 15px rgba(0,0,0,0.05); transition: transform 0.3s; border-bottom: 4px solid var(--secondary); }
.card:hover { transform: translateY(-5px); }
.card h3 { color: var(--primary); margin-top: 0; }

/* Product Specifics */
.prod-tag { display: inline-block; background: #e9ecef; padding: 5px 10px; border-radius: 20px; font-size: 0.85rem; color: #666; margin-bottom: 15px; }

/* Footer */
footer { background: #212529; color: #adb5bd; text-align: center; padding: 30px 0; margin-top: auto; }

/* Responsive */
@media (max-width: 768px) {
    .nav-bar { flex-direction: column; }
    .nav-links { margin-top: 20px; }
    .nav-links a { margin: 0 10px; }
    .hero h1 { font-size: 2.5rem; }
}