/* Eco-Industrial Engine 2026 - Specially for EcoEnergySol.com */
:root {
    --bg-color: #0d0f12;         /* Deep Charcoal/Black */
    --accent-color: #00ff9d;     /* Electric Neon Mint */
    --text-color: #e0e6ed;       /* Soft White/Grey */
    --card-bg: #1a1d23;          /* Lighter Grey for boxes */
    --border-color: #2d343f;     /* Steel Blue/Grey */
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Inter', -apple-system, sans-serif;
    margin: 0;
    line-height: 1.6;
}

/* Engineering-style Header */
header {
    padding: 60px 20px;
    border-bottom: 1px solid var(--border-color);
    background: radial-gradient(circle at top right, #16201c, transparent);
}

h1 {
    font-family: 'JetBrains Mono', monospace; /* Technical font */
    font-size: 2.8rem;
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: -1px;
    margin: 0;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* The Grid for Solutions */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 40px;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 30px;
    transition: 0.3s ease;
}

.card:hover {
    border-color: var(--accent-color);
    box-shadow: 0 0 20px rgba(0, 255, 157, 0.1);
}

.card h3 {
    color: var(--accent-color);
    margin-top: 0;
    font-family: 'JetBrains Mono', monospace;
}

/* Call to Action Button */
.btn {
    display: inline-block;
    background-color: var(--accent-color);
    color: var(--bg-color);
    padding: 15px 35px;
    text-decoration: none;
    font-weight: 800;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 1px;
    margin-top: 30px;
}

footer {
    text-align: center;
    padding: 40px;
    font-size: 0.8rem;
    color: #555;
    border-top: 1px solid var(--border-color);
}