:root {
    --deep-ocean: #001B48;
    --crest-cyan: #00F2FF;
    --cyclone-purple: #7B2CBF;
    --buoy-yellow: #FFD60A;
    --text-light: #E0F7FA;
    --glass-bg: rgba(0, 27, 72, 0.7);
}

body {
    background-color: var(--deep-ocean);
    color: var(--text-light);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    overflow-x: hidden;
}

.navbar {
    background: rgba(0, 27, 72, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 242, 255, 0.2);
}

.navbar-brand {
    font-weight: 800;
    color: var(--crest-cyan) !important;
    letter-spacing: 1px;
}

.nav-link {
    color: var(--text-light) !important;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-link:hover {
    color: var(--crest-cyan) !important;
}

.hero-section {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: radial-gradient(circle at center, #002d72 0%, #001B48 100%);
}

.hero-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    opacity: 0.6;
}

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

.btn-thalassa {
    background: transparent;
    border: 2px solid var(--crest-cyan);
    color: var(--crest-cyan);
    padding: 12px 30px;
    font-weight: 600;
    border-radius: 0;
    transition: all 0.4s;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.btn-thalassa:hover {
    background: var(--crest-cyan);
    color: var(--deep-ocean);
    box-shadow: 0 0 20px var(--crest-cyan);
}

.card-custom {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(0, 242, 255, 0.1);
    border-radius: 0;
    transition: transform 0.3s, border 0.3s;
}

.card-custom:hover {
    transform: translateY(-10px);
    border-color: var(--crest-cyan);
}

.footer {
    padding: 50px 0;
    border-top: 1px solid rgba(0, 242, 255, 0.1);
    background: #000D23;
}

/* Math Typography */
.math-font {
    font-family: 'Courier New', Courier, monospace;
    color: var(--crest-cyan);
}

/* Dashboard Elements */
.dashboard-card {
    background: #00245a;
    border-left: 4px solid var(--crest-cyan);
    padding: 20px;
    margin-bottom: 20px;
}

.status-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 8px;
}

.status-online { background-color: #00FF00; box-shadow: 0 0 10px #00FF00; }

.section-title {
    border-left: 5px solid var(--crest-cyan);
    padding-left: 15px;
    margin-bottom: 30px;
    font-weight: 700;
}