:root {
    --lotte-blue: #004d99;
    --lotte-red: #ed1c24;
    --glass: rgba(255, 255, 255, 0.75);
    --sidebar-width: 260px;
}

body {
    background: #f0f2f5 url('https://www.transparenttextures.com/patterns/cubes.png');
    font-family: 'Inter', sans-serif;
    overflow-x: hidden;
}

/* Glassmorphism Card */
.glass-card {
    background: var(--glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 16px;
    box-shadow: 0 8px 32px 0 rgba(0, 77, 153, 0.1);
}

/* Modern Sidebar */
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    position: fixed;
    background: linear-gradient(180deg, #003366 0%, #004d99 100%);
    color: white;
    padding: 20px;
    z-index: 1000;
}

.sidebar .nav-link {
    color: rgba(255,255,255,0.8);
    margin-bottom: 10px;
    border-radius: 10px;
    transition: 0.3s;
}

.sidebar .nav-link.active, .sidebar .nav-link:hover {
    background: rgba(255,255,255,0.2);
    color: white;
    transform: translateX(5px);
}

/* AI Assistant Pulse */
.ai-pulse {
    width: 12px;
    height: 12px;
    background: #00f2fe;
    border-radius: 50%;
    display: inline-block;
    box-shadow: 0 0 0 rgba(0, 242, 254, 0.4);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(0, 242, 254, 0.7); }
    70% { box-shadow: 0 0 0 15px rgba(0, 242, 254, 0); }
    100% { box-shadow: 0 0 0 0 rgba(0, 242, 254, 0); }
}