:root {
    --steel-blue: #263238;
    --traceable-gold: #FFB300;
    --laser-green: #00E676;
    --vacuum-white: #ECEFF1;
    --grid-line: rgba(236, 239, 241, 0.1);
}

body {
    background-color: var(--steel-blue);
    color: var(--vacuum-white);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    overflow-x: hidden;
}

.mono-font {
    font-family: 'JetBrains Mono', 'Courier New', monospace;
}

/* Background Grid Effect */
body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(var(--grid-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
    background-size: 50px 50px;
    z-index: -1;
}

.navbar {
    background-color: rgba(38, 50, 56, 0.95);
    border-bottom: 1px solid var(--traceable-gold);
    backdrop-filter: blur(10px);
}

.navbar-brand {
    font-weight: 800;
    letter-spacing: 2px;
    color: var(--traceable-gold) !important;
}

.nav-link {
    color: var(--vacuum-white) !important;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1px;
    transition: color 0.3s;
}

.nav-link:hover, .nav-link.active {
    color: var(--traceable-gold) !important;
}

.btn-gold {
    background-color: var(--traceable-gold);
    color: var(--steel-blue);
    font-weight: bold;
    border-radius: 0;
    padding: 10px 25px;
    transition: all 0.3s;
}

.btn-gold:hover {
    background-color: #e6a100;
    transform: translateY(-2px);
}

.section-title {
    border-left: 4px solid var(--traceable-gold);
    padding-left: 15px;
    margin-bottom: 40px;
    text-transform: uppercase;
    letter-spacing: 3px;
}

.card-precision {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 0;
    transition: all 0.3s;
}

.card-precision:hover {
    border-color: var(--traceable-gold);
    background: rgba(255, 255, 255, 0.05);
}

footer {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 50px 0;
    margin-top: 100px;
}

/* Custom Scale/Ruler Effect */
.ruler-top {
    height: 20px;
    background-image: repeating-linear-gradient(90deg, var(--traceable-gold), var(--traceable-gold) 1px, transparent 1px, transparent 10px);
    opacity: 0.3;
}