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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f4f6f9;
    color: #333;
}

.container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background-color: #2c3e50;
    color: white;
    padding: 20px 0;
}

.logo h2 {
    color: #3498db;
    padding: 0 20px 30px;
    border-bottom: 1px solid #34495e;
    margin-bottom: 20px;
}

.sidebar ul {
    list-style: none;
}

.sidebar li {
    padding: 15px 25px;
    cursor: pointer;
    transition: all 0.3s;
}

.sidebar li:hover,
.sidebar li.active {
    background-color: #34495e;
}

.content {
    flex: 1;
    padding: 30px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 1px solid #ddd;
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    text-align: center;
}

.stat-card h3 {
    font-size: 1rem;
    color: #666;
    margin-bottom: 8px;
}

.stat-card p {
    font-size: 2.2rem;
    font-weight: bold;
    color: #2c3e50;
}

.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.btn-primary {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 10px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
}

.btn-small {
    padding: 5px 10px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 13px;
}

.delete {
    background-color: #e74c3c;
    color: white;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    border-radius: 8px;
    overflow: hidden;
}

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

th {
    background-color: #2c3e50;
    color: white;
}

tr:hover {
    background-color: #f8f9fa;
}

.page {
    display: none;
}

.page.active {
    display: block;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    z-index: 1000;
}

.modal-content {
    background: white;
    width: 460px;
    margin: 80px auto;
    border-radius: 10px;
    padding: 25px;
}

.close {
    float: right;
    font-size: 30px;
    cursor: pointer;
    color: #aaa;
}

.close:hover {
    color: #333;
}

input, select {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 14px;
}

.status {
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.85em;
    font-weight: 500;
}

.tersedia { background: #2ecc71; color: white; }
.dipinjam { background: #e67e22; color: white; }