:root {
    --deep-rock-grey: #3E3E3E;
    --cutter-gold: #F4B400;
    --earth-green: #00C49A;
    --warning-red: #D72638;
    --dark-bg: #1A1A1A;
    --text-light: #E0E0E0;
    --industrial-font: 'Roboto Mono', monospace;
}

body {
    background-color: var(--dark-bg);
    color: var(--text-light);
    font-family: 'Inter', sans-serif;
    overflow-x: hidden;
}

h1, h2, h3, .industrial-text {
    font-family: var(--industrial-font);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.navbar {
    background-color: rgba(30, 30, 30, 0.95);
    border-bottom: 2px solid var(--cutter-gold);
}

.navbar-brand {
    color: var(--cutter-gold) !important;
    font-weight: bold;
    font-family: var(--industrial-font);
}

.nav-link {
    color: var(--text-light) !important;
    transition: color 0.3s;
}

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

.btn-cutter {
    background-color: var(--cutter-gold);
    color: var(--deep-rock-grey);
    font-weight: bold;
    border-radius: 0;
    border: none;
    padding: 10px 25px;
    transition: all 0.3s;
}

.btn-cutter:hover {
    background-color: #d49b00;
    transform: translateY(-2px);
}

.section-title {
    border-left: 5px solid var(--cutter-gold);
    padding-left: 15px;
    margin-bottom: 30px;
}

.card-industrial {
    background-color: var(--deep-rock-grey);
    border: 1px solid #555;
    border-radius: 0;
    color: var(--text-light);
}

.footer {
    background-color: #111;
    padding: 50px 0;
    border-top: 1px solid #333;
}

/* TBM Cutter Animation */
@keyframes rotate-cutter {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.cutter-head {
    animation: rotate-cutter 20s linear infinite;
}