:root {
    --primary: #16a085;
    --secondary: #2c3e50;
    --accent: #e67e22;
    --light-bg: #f8fffe;
    --text-dark: #2c3e50;
    --shadow-light: 0 5px 15px rgba(22, 160, 133, 0.1);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--light-bg);
    color: var(--text-dark);
}

.navbar {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-light);
    padding: 1rem 0;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.8rem;
    color: var(--primary) !important;
}

.btn-floating {
    background: var(--primary);
    border: none;
    color: white;
    padding: 10px 25px;
    font-weight: 600;
    border-radius: 50px;
    transition: all 0.3s;
}

.btn-floating:hover {
    background: var(--accent);
    transform: translateY(-2px);
}

main {
    padding-top: 80px;
    min-height: calc(100vh - 80px);
}

/* Mobile responsive utilities */
@media (max-width: 768px) {
    .table-responsive {
        font-size: 0.875rem;
    }
    
    .btn-group-vertical .btn {
        margin-bottom: 0.25rem;
    }
    
    .card-header .d-flex {
        flex-direction: column;
        align-items: flex-start !important;
    }
    
    .card-header .d-flex > * {
        margin-bottom: 0.5rem;
    }
    
    .card-header .d-flex > *:last-child {
        margin-bottom: 0;
    }
}