:root {
    --brand-yellow: #FFD600;
    --carbon-dark: #263238;
    --steel-silver: #ECEFF1;
    --overload-red: #B71C1C;
    --industrial-gray: #37474F;
    --tech-blue: #0288D1;
}

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

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

.bg-brand-yellow { background-color: var(--brand-yellow); color: var(--carbon-dark); }
.text-brand-yellow { color: var(--brand-yellow); }
.border-brand-yellow { border-color: var(--brand-yellow) !important; }

/* Industrial aesthetic */
.navbar {
    background-color: rgba(38, 50, 56, 0.95);
    border-bottom: 2px solid var(--brand-yellow);
}

.nav-link {
    color: var(--steel-silver) !important;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 1px;
    padding: 1rem 1.5rem !important;
}

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

.btn-industrial {
    background-color: var(--brand-yellow);
    color: var(--carbon-dark);
    border-radius: 0;
    font-weight: 800;
    text-transform: uppercase;
    padding: 10px 25px;
    border: none;
    transition: all 0.3s;
}

.btn-industrial:hover {
    background-color: #e6c100;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(255, 214, 0, 0.3);
}

.section-title {
    border-left: 5px solid var(--brand-yellow);
    padding-left: 15px;
    margin-bottom: 30px;
    text-transform: uppercase;
    font-weight: 800;
}

.card-industrial {
    background: #2c3e50;
    border: 1px solid #455a64;
    border-radius: 0;
    color: var(--steel-silver);
}

.footer {
    background-color: #1a252b;
    border-top: 1px solid var(--industrial-gray);
    padding: 40px 0;
    margin-top: 50px;
}

/* Gear animation and stress cloud background placeholders */
.gear-bg {
    background: radial-gradient(circle at center, #37474F 0%, #263238 100%);
    position: relative;
    overflow: hidden;
}

.stress-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" stroke="%230288D1" stroke-width="0.5" fill="none" opacity="0.2"/></svg>');
    opacity: 0.1;
    pointer-events: none;
}