/* AquaWelder Master CSS - Industrial Dark Theme */
:root {
    --dark: #0a0a0a;
    --surface: #141414;
    --accent: #2ECC71; /* Green Hydrogen */
    --text: #ffffff;
    --muted: #a0a0a0;
    --border: #262626;
}

* { box-sizing: border-box; }

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

/* Ensure all sections inherit the dark background */
section, div, header, footer {
    background-color: transparent;
}

header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 20px 5%; background: rgba(10, 10, 10, 0.98);
    border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 1000;
}

.logo { font-size: 1.3rem; font-weight: 800; text-transform: uppercase; letter-spacing: 1px; }
.logo span { color: var(--accent); }

.nav-links { display: flex; align-items: center; }
.nav-links a { color: var(--text); text-decoration: none; margin-left: 20px; font-size: 0.8rem; font-weight: 600; text-transform: uppercase; transition: 0.3s; }
.nav-links a:hover { color: var(--accent); }

.btn-small { background: var(--accent); color: #000 !important; padding: 10px 18px !important; border-radius: 4px; margin-left: 20px; border: none; font-weight: 700; cursor: pointer; }

.container { max-width: 1200px; margin: 0 auto; padding: 60px 5%; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; margin-top: 40px; }

.card { 
    background: var(--surface); 
    padding: 40px; 
    border: 1px solid var(--border); 
    border-radius: 4px;
    height: 100%;
}
.card:hover { border-color: var(--accent); }

.btn { padding: 16px 32px; background: var(--accent); color: #000; text-decoration: none; font-weight: 700; border-radius: 4px; display: inline-block; border: none; }

table { width: 100%; border-collapse: collapse; margin-top: 20px; }
table td { padding: 12px 0; border-bottom: 1px solid var(--border); font-size: 0.9rem; }
table td:last-child { text-align: right; color: var(--accent); font-weight: bold; }

footer { padding: 60px 5%; border-top: 1px solid var(--border); text-align: center; color: var(--muted); font-size: 0.85rem; }

/* Responsive */
@media (max-width: 768px) {
    .nav-links { display: none; }
}