/* Reset sederhana */
body, html {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
}

/* Sidebar umum */
nav {
    min-height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
}

nav h4 {
    margin-bottom: 20px;
    font-weight: 600;
    font-size: 1.5rem;
}

nav .nav-link {
    padding: 10px 15px;
    margin-bottom: 5px;
    border-radius: 5px;
    transition: all 0.2s;
}

nav .nav-link:hover {
    background-color: rgba(255,255,255,0.2);
    text-decoration: none;
}

/* Warna sidebar per role */
nav.bg-primary { background-color: #0d6efd !important; }
nav.bg-success { background-color: #198754 !important; }
nav.bg-warning { background-color: #ffc107 !important; color: #212529 !important; }

/* Main content */
.flex-grow-1 {
    margin-left: 250px;
    padding: 20px;
}

/* Cards modern */
.card {
    border: none;
    border-radius: 12px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

/* Tables */
table {
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
}

table th {
    background-color: #0d6efd;
    color: #fff;
}

table th, table td {
    padding: 10px 15px;
    text-align: left;
}

table tr:nth-child(even) {
    background-color: #f2f2f2;
}

/* Buttons */
.btn {
    border-radius: 8px;
    transition: all 0.2s;
}

.btn:hover {
    opacity: 0.9;
}

/* Forms */
input, select, textarea {
    border-radius: 8px;
    padding: 8px 12px;
    border: 1px solid #ced4da;
    transition: all 0.2s;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: #0d6efd;
    box-shadow: 0 0 5px rgba(13,110,253,0.3);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .flex-grow-1 {
        margin-left: 0;
        padding: 15px;
    }
    nav {
        position: relative;
        width: 100%;
        min-height: auto;
    }
}