:root {
    --silver: #CFD8DC;
    --deep-blue: #263238;
    --warning-orange: #FF8F00;
    --digital-green: #2E7D32;
    --text-dark: #212121;
    --text-light: #ECEFF1;
    --grid-line: rgba(0, 0, 0, 0.05);
}

body {
    background-color: var(--silver);
    color: var(--text-dark);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: -0.02em;
    color: var(--deep-blue);
}

.mono-text {
    font-family: 'Fira Code', 'Courier New', monospace;
    font-size: 0.9em;
}

/* Bauhaus Grid Background */
.bauhaus-grid {
    background-image: 
        linear-gradient(var(--grid-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
    background-size: 40px 40px;
}

/* Navbar */
.navbar {
    background-color: var(--deep-blue) !important;
    border-bottom: 4px solid var(--warning-orange);
}

.navbar-brand {
    font-weight: 900;
    color: white !important;
}

.nav-link {
    color: rgba(255, 255, 255, 0.8) !important;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    padding: 0.5rem 1rem !important;
}

.nav-link:hover {
    color: var(--warning-orange) !important;
}

/* Buttons */
.btn-industrial {
    background-color: var(--deep-blue);
    color: white;
    border-radius: 0;
    font-weight: 700;
    padding: 10px 25px;
    border: none;
    transition: all 0.3s;
}

.btn-industrial:hover {
    background-color: var(--warning-orange);
    color: var(--deep-blue);
}

/* Card Styles */
.card-industrial {
    background: white;
    border: none;
    border-left: 5px solid var(--deep-blue);
    border-radius: 0;
    box-shadow: 10px 10px 0px rgba(38, 50, 56, 0.1);
    transition: transform 0.3s;
}

.card-industrial:hover {
    transform: translate(-5px, -5px);
    box-shadow: 15px 15px 0px rgba(38, 50, 56, 0.15);
}

/* Section Titles */
.section-title {
    position: relative;
    padding-bottom: 15px;
    margin-bottom: 40px;
}

.section-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 60px;
    height: 5px;
    background: var(--warning-orange);
}

/* Footer */
footer {
    background: var(--deep-blue);
    color: white;
    padding: 60px 0 20px;
    border-top: 10px solid var(--warning-orange);
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 900;
    margin-bottom: 20px;
}

/* 3D Simulation Placeholder Style */
.industrial-3d-placeholder {
    background: #000;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--digital-green);
    border: 2px solid var(--deep-blue);
    position: relative;
    overflow: hidden;
}

.industrial-3d-placeholder::before {
    content: 'SYSTEM_ACTIVE_3D_RENDER';
    position: absolute;
    top: 10px;
    left: 10px;
    font-family: monospace;
    font-size: 12px;
}