* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f4f6f9;
    color: #2d3436;
    line-height: 1.6;
}

.navbar {
    background: #2c3e50;
    padding: 16px 0;
}

.nav-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-container h1 {
    color: #fff;
    font-size: 20px;
    flex: 1;
}

.btn-nav {
    color: #ecf0f1;
    text-decoration: none;
    padding: 8px 14px;
    border-radius: 6px;
    background: rgba(255,255,255,0.1);
    transition: background 0.2s;
    font-size: 14px;
}

.btn-nav:hover {
    background: rgba(255,255,255,0.2);
}

.container {
    max-width: 1100px;
    margin: 30px auto;
    padding: 0 20px;
}

h2 {
    margin-bottom: 20px;
    color: #2c3e50;
}

.summary-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.card {
    background: #fff;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.06);
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.card-label {
    font-size: 13px;
    color: #7f8c8d;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.card-value {
    font-size: 24px;
    font-weight: 700;
    color: #2c3e50;
}

.search-form {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.search-form input[type="text"] {
    flex: 1;
    padding: 10px 14px;
    border: 1px solid #dcdde1;
    border-radius: 6px;
    font-size: 14px;
}

.btn {
    display: inline-block;
    padding: 10px 18px;
    border-radius: 6px;
    text-decoration: none;
    border: none;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: opacity 0.2s;
}

.btn:hover {
    opacity: 0.85;
}

.btn-primary {
    background: #2980b9;
    color: #fff;
}

.btn-secondary {
    background: #bdc3c7;
    color: #2d3436;
}

.btn-edit {
    background: #f39c12;
    color: #fff;
    padding: 6px 12px;
    font-size: 13px;
}

.btn-hapus {
    background: #e74c3c;
    color: #fff;
    padding: 6px 12px;
    font-size: 13px;
}

.table-barang {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 6px rgba(0,0,0,0.06);
}

.table-barang th,
.table-barang td {
    padding: 12px 14px;
    text-align: left;
    border-bottom: 1px solid #ecf0f1;
    font-size: 14px;
}

.table-barang th {
    background: #34495e;
    color: #fff;
    font-weight: 600;
}

.table-barang tbody tr:hover {
    background: #f9fafb;
}

.text-center {
    text-align: center;
    color: #95a5a6;
}

.aksi {
    display: flex;
    gap: 8px;
}

.badge {
    padding: 4px 10px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 13px;
}

.stok-aman {
    background: #d4efdf;
    color: #1e8449;
}

.stok-rendah {
    background: #fdebd0;
    color: #b9770e;
}

.stok-kritis {
    background: #fadbd8;
    color: #c0392b;
}

.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
}

.alert-success {
    background: #d4efdf;
    color: #1e8449;
}

.alert-error ul {
    margin-left: 18px;
}

.alert-error {
    background: #fadbd8;
    color: #c0392b;
}

.form-barang {
    background: #fff;
    padding: 24px;
    border-radius: 10px;
    max-width: 500px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.06);
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
    font-size: 14px;
    color: #2c3e50;
}

.form-group input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #dcdde1;
    border-radius: 6px;
    font-size: 14px;
}

.form-aksi {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

footer {
    text-align: center;
    padding: 20px;
    color: #95a5a6;
    font-size: 13px;
}