body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f4f7f6;
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

h1, h2 {
    color: #333;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.device-card {
    background: #fff;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.2s;
}

.device-card:hover {
    transform: translateY(-5px);
}

.device-card h3 {
    margin-top: 0;
    color: #007bff;
}

.device-card p {
    margin: 5px 0;
    font-size: 0.9em;
    color: #666;
}

.btn {
    display: inline-block;
    padding: 10px 15px;
    background: #007bff;
    color: #fff;
    text-decoration: none;
    border-radius: 5px;
    margin-top: 10px;
    font-size: 0.9em;
}

.btn:hover {
    background: #0056b3;
}

.btn-danger {
    background: #dc3545;
}

.btn-danger:hover {
    background: #c82333;
}

.screenshot-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 10px;
}

.screenshot-item img {
    width: 100%;
    border-radius: 5px;
    border: 1px solid #ddd;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    margin-top: 10px;
}

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

th {
    background: #f8f9fa;
}

.status-indicator {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin-right: 5px;
}

.status-online { background: #28a745; }
.status-offline { background: #dc3545; }

/* Login Overlay */
.login-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.login-box {
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}

.login-box input {
    display: block;
    width: 250px;
    padding: 10px;
    margin: 15px auto;
    border: 1px solid #ccc;
    border-radius: 5px;
}

.logout-link {
    float: right;
    color: #dc3545;
    text-decoration: none;
    font-weight: bold;
}