:root {
    --neu-bg: #e0e5ec;
    --neu-shadow-dark: #a3b1c6;
    --neu-shadow-light: #ffffff;
    --neu-primary: #667eea;
    --neu-secondary: #764ba2;
    --transition-speed: 0.3s;
}

.neu-bg { background: var(--neu-bg); min-height: 100vh; }

.neu-card {
    background: var(--neu-bg);
    border-radius: 20px;
    padding: 25px;
    box-shadow: 20px 20px 60px var(--neu-shadow-dark), -20px -20px 60px var(--neu-shadow-light);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    will-change: transform;
}

.neu-card:hover {
    transform: translateY(-5px);
    box-shadow: 25px 25px 60px var(--neu-shadow-dark), -25px -25px 60px var(--neu-shadow-light);
}

.neu-card-inset {
    background: var(--neu-bg);
    border-radius: 15px;
    padding: 20px;
    box-shadow: inset 5px 5px 10px var(--neu-shadow-dark), inset -5px -5px 10px var(--neu-shadow-light);
}

.neu-btn {
    background: var(--neu-bg);
    border: none;
    border-radius: 12px;
    padding: 12px 25px;
    color: #333;
    font-weight: 600;
    box-shadow: 5px 5px 10px var(--neu-shadow-dark), -5px -5px 10px var(--neu-shadow-light);
    transition: box-shadow 0.2s, transform 0.2s;
    cursor: pointer;
    display: inline-block;
    text-decoration: none;
}

.neu-btn:hover {
    box-shadow: inset 5px 5px 10px var(--neu-shadow-dark), inset -5px -5px 10px var(--neu-shadow-light);
    transform: scale(0.98);
    text-decoration: none;
    color: inherit;
}

.neu-btn-primary {
    background: linear-gradient(135deg, var(--neu-primary), var(--neu-secondary));
    color: white;
}

.neu-hero {
    text-align: center;
    padding: 100px 0;
    background: linear-gradient(135deg, var(--neu-primary), var(--neu-secondary));
    color: white;
    border-radius: 0 0 30px 30px;
    margin-bottom: 50px;
}

.neu-stat-card {
    background: var(--neu-bg);
    border-radius: 20px;
    padding: 25px;
    text-align: center;
    box-shadow: 15px 15px 30px var(--neu-shadow-dark), -15px -15px 30px var(--neu-shadow-light);
}

.neu-alert {
    background: var(--neu-bg);
    border-radius: 15px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 10px 10px 20px var(--neu-shadow-dark), -10px -10px 20px var(--neu-shadow-light);
    border-left: 5px solid;
}

.mt-1 { margin-top: 0.5rem; } .mt-2 { margin-top: 1rem; } .mt-3 { margin-top: 1.5rem; } .mt-4 { margin-top: 2rem; } .mt-5 { margin-top: 3rem; }
.mb-1 { margin-bottom: 0.5rem; } .mb-2 { margin-bottom: 1rem; } .mb-3 { margin-bottom: 1.5rem; } .mb-4 { margin-bottom: 2rem; } .mb-5 { margin-bottom: 3rem; }

.text-primary { color: var(--neu-primary) !important; }
.text-success { color: #10b981 !important; }
.text-danger { color: #ef4444 !important; }
.text-warning { color: #f59e0b !important; }

@media (min-width: 768px) {
    ::-webkit-scrollbar { width: 10px; }
    ::-webkit-scrollbar-track { background: #f1f1f1; }
    ::-webkit-scrollbar-thumb { background: var(--neu-primary); border-radius: 5px; }
    ::-webkit-scrollbar-thumb:hover { background: var(--neu-secondary); }
}

@media (max-width: 768px) {
    .neu-card { padding: 15px; }
    .neu-btn { padding: 10px 20px; }
    .neu-hero { padding: 50px 0; }
}