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

:root {
    --primary: #3b82f6;
    --secondary: #6b7280;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --dark: #1f2937;
    --light: #f3f4f6;
    --border: #e5e7eb;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: var(--dark);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 12px;
    box-shadow: 0 20px 25px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, var(--primary) 0%, #667eea 100%);
    color: white;
    padding: 40px 20px;
    text-align: center;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.1em;
    opacity: 0.9;
}

.controls {
    display: flex;
    gap: 15px;
    padding: 20px;
    background: var(--light);
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1em;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: #2563eb;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

.btn-success {
    background: var(--success);
    color: white;
}

.btn-success:hover {
    background: #059669;
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-danger:hover {
    background: #dc2626;
}

.btn-warning {
    background: var(--warning);
    color: white;
}

.btn-warning:hover {
    background: #d97706;
}

.btn-secondary {
    background: var(--secondary);
    color: white;
}

.btn-secondary:hover {
    background: #4b5563;
}

.btn-icon {
    background: none;
    border: none;
    font-size: 1.2em;
    cursor: pointer;
    padding: 5px 10px;
    transition: transform 0.2s;
}

.btn-icon:hover {
    transform: scale(1.2);
}

.search-input {
    padding: 10px 15px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 1em;
    flex: 1;
    min-width: 250px;
    transition: border-color 0.3s;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.table-container {
    overflow-x: auto;
    padding: 20px;
}

.devices-table {
    width: 100%;
    border-collapse: collapse;
}

.devices-table thead {
    background: var(--light);
    border-bottom: 2px solid var(--border);
}

.devices-table th {
    padding: 15px;
    text-align: left;
    font-weight: 600;
    color: var(--dark);
}

.devices-table tbody tr {
    border-bottom: 1px solid var(--border);
    transition: background 0.2s;
}

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

.devices-table td {
    padding: 15px;
}

.device-name {
    cursor: pointer;
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

.device-name:hover {
    text-decoration: underline;
}

.small {
    font-size: 0.9em;
    color: var(--secondary);
}

.actions {
    display: flex;
    gap: 10px;
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--secondary);
    font-size: 1.1em;
}

/* Modal Styles */
.modal {
    padding: 0;
    border: none;
    background: transparent;
    max-width: 100vw;
    max-height: 100vh;
    width: 100%;
    height: 100%;
    overflow: visible;
}

.modal::backdrop {
    background: rgba(0, 0, 0, 0.5);
}

.modal:popover-open {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: white;
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

@keyframes slideUp {
    from {
        transform: translateY(30px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--border);
    background: var(--light);
}

.modal-header h2 {
    font-size: 1.5em;
}

.close-btn {
    background: none;
    border: none;
    font-size: 2em;
    cursor: pointer;
    color: var(--secondary);
    transition: color 0.2s;
}

.close-btn:hover {
    color: var(--dark);
}

.form {
    padding: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--dark);
}

.form-group input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 1em;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

.device-details {
    padding: 20px;
}

.details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.detail-item {
    padding: 15px;
    background: var(--light);
    border-radius: 8px;
}

.detail-item .label {
    display: block;
    font-weight: 600;
    color: var(--secondary);
    margin-bottom: 5px;
    font-size: 0.9em;
}

.detail-item span:last-child {
    font-size: 1.1em;
    color: var(--dark);
}

.actions-modal {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

/* Toast Notification */
.toast {
    margin: 0;
    padding: 15px 20px;
    border: none;
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--success);
    color: white;
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 2000;
    max-width: 300px;
}

.toast:popover-open {
    display: block;
    animation: toastIn 0.3s ease;
}

@keyframes toastIn {
    from {
        transform: translateY(100px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 1.8em;
    }

    .controls {
        flex-direction: column;
    }

    .search-input {
        min-width: auto;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .devices-table {
        font-size: 0.9em;
    }

    .devices-table th,
    .devices-table td {
        padding: 10px;
    }

    .actions {
        flex-direction: column;
    }

    .details-grid {
        grid-template-columns: 1fr;
    }

    .modal-content {
        width: 95%;
    }
}