/* Sonic-Logic Engineering Custom Styles */
:root {
    --ebony-black: #1B1B1B;
    --resonance-gold: #D4AF37;
    --frequency-blue: #00B0FF;
    --natural-wood: #8D6E63;
    --text-light: #F5F5F5;
    --text-muted: #A0A0A0;
}

body {
    background-color: var(--ebony-black);
    color: var(--text-light);
    font-family: 'Playfair Display', serif; /* For artistic heritage */
    line-height: 1.6;
}

code, .data-font {
    font-family: 'JetBrains Mono', 'Courier New', monospace; /* For technical precision */
}

/* Navbar Styling */
.navbar {
    background-color: rgba(27, 27, 27, 0.95);
    border-bottom: 1px solid var(--resonance-gold);
    padding: 1rem 2rem;
}

.navbar-brand {
    color: var(--resonance-gold) !important;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.nav-link {
    color: var(--text-light) !important;
    margin: 0 10px;
    transition: color 0.3s ease;
}

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

/* Hero Section */
.hero-section {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: radial-gradient(circle at center, #2c2c2c 0%, #1b1b1b 100%);
}

.hero-content {
    z-index: 2;
    text-align: center;
}

.hero-title {
    font-size: 4rem;
    color: var(--resonance-gold);
    margin-bottom: 1rem;
    text-shadow: 0 0 20px rgba(212, 175, 55, 0.3);
}

/* Cards and Sections */
.card {
    background-color: #252525;
    border: 1px solid #333;
    color: var(--text-light);
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.card:hover {
    border-color: var(--resonance-gold);
    transform: translateY(-5px);
}

.section-title {
    color: var(--resonance-gold);
    border-left: 4px solid var(--resonance-gold);
    padding-left: 15px;
    margin-bottom: 2rem;
}

/* Footer */
footer {
    background-color: #111;
    padding: 4rem 0 2rem;
    border-top: 1px solid #333;
}

.footer-brand {
    color: var(--resonance-gold);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

/* Utility Classes */
.text-gold { color: var(--resonance-gold); }
.text-blue { color: var(--frequency-blue); }
.bg-ebony { background-color: var(--ebony-black); }

/* Chladni Pattern Placeholder Animation */
@keyframes pulse-gold {
    0% { opacity: 0.3; }
    50% { opacity: 0.7; }
    100% { opacity: 0.3; }
}

.chladni-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.2;
    pointer-events: none;
}