/* Reset & Base */
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: #333; }
.container { width: 90%; max-width: 1100px; margin: auto; padding: 0 20px; }
a { text-decoration: none; color: inherit; }

/* Colors */
:root {
    --primary: #2ecc71; /* Green Energy */
    --dark: #2c3e50;
    --light: #ecf0f1;
}

/* Navbar */
.navbar { background: var(--dark); color: #fff; padding: 1rem 0; position: sticky; top: 0; z-index: 1000; }
.navbar .container { display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 1.5rem; color: var(--primary); }
.nav-links { list-style: none; display: flex; gap: 20px; }
.nav-links a:hover { color: var(--primary); }

/* Hero */
.hero { background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('https://images.unsplash.com/photo-1546552356-3fae876a61ca?ixlib=rb-1.2.1&auto=format&fit=crop&w=1350&q=80'); background-size: cover; background-position: center; color: #fff; text-align: center; padding: 100px 0; }
.hero h2 { font-size: 3rem; margin-bottom: 20px; }
.hero p { font-size: 1.2rem; margin-bottom: 30px; max-width: 600px; margin-left: auto; margin-right: auto; }

/* Buttons */
.btn { display: inline-block; padding: 10px 30px; border-radius: 5px; transition: 0.3s; cursor: pointer; border: none; font-size: 1rem; }
.btn-primary { background: var(--primary); color: #fff; font-weight: bold; }
.btn-primary:hover { background: #27ae60; }
.btn-outline { border: 2px solid var(--primary); color: var(--primary); display: block; text-align: center; margin-top: 15px; }
.btn-outline:hover { background: var(--primary); color: white; }

/* Trust Bar */
.trust-bar { background: #f4f4f4; padding: 20px 0; border-bottom: 1px solid #ddd; }
.trust-bar .container { display: flex; justify-content: space-around; flex-wrap: wrap; text-align: center; }
.trust-item i { color: var(--primary); margin-right: 8px; }

/* Products */
.products { padding: 60px 0; }
.section-title { text-align: center; font-size: 2rem; margin-bottom: 40px; color: var(--dark); }
.product-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
.product-card { border: 1px solid #ddd; border-radius: 8px; padding: 20px; position: relative; transition: transform 0.3s; background: #fff; }
.product-card:hover { transform: translateY(-5px); box-shadow: 0 10px 20px rgba(0,0,0,0.1); }
.product-card img { width: 100%; border-radius: 5px; margin-bottom: 15px; }
.product-card h4 { font-size: 1.4rem; margin-bottom: 10px; }
.badge { position: absolute; top: 10px; right: 10px; background: var(--dark); color: #fff; padding: 5px 10px; font-size: 0.8rem; border-radius: 3px; }
.specs { font-weight: bold; color: #7f8c8d; font-size: 0.9rem; margin-bottom: 10px; }

/* Calculator */
.calculator-section { background: var(--dark); color: #fff; padding: 60px 0; text-align: center; }
.calc-sub { margin-bottom: 30px; opacity: 0.8; }
.calc-box { background: rgba(255,255,255,0.1); padding: 30px; border-radius: 10px; max-width: 500px; margin: auto; }
.input-group { margin-bottom: 20px; text-align: left; }
.input-group label { display: block; margin-bottom: 5px; }
.input-group input { width: 100%; padding: 10px; border-radius: 5px; border: none; }
.calc-result { margin-top: 20px; font-size: 1.5rem; color: var(--primary); font-weight: bold; }

/* Footer */
footer { background: #222; color: #aaa; padding: 40px 0; text-align: center; font-size: 0.9rem; }
.disclaimer { margin-top: 15px; font-size: 0.8rem; opacity: 0.6; max-width: 800px; margin-left: auto; margin-right: auto; }

/* Responsive */
@media (max-width: 768px) {
    .nav-links { display: none; } /* Simplified for mobile */
    .hero h2 { font-size: 2rem; }
}