/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

/* Screen Management */
.screen {
    display: none;
}

.screen.active {
    display: block;
}

/* Login Screen */
#loginScreen {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.login-container {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    width: 100%;
    max-width: 400px;
}

.login-container h1 {
    text-align: center;
    margin-bottom: 30px;
    color: #667eea;
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: #555;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: #667eea;
}

.form-group small {
    display: block;
    margin-top: 5px;
    color: #888;
    font-size: 12px;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary {
    background: #667eea;
    color: white;
}

.btn-primary:hover {
    background: #5568d3;
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #5a6268;
}

.btn-danger {
    background: #dc3545;
    color: white;
}

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

.btn-warning {
    background: #ffc107;
    color: #212529;
}

.btn-warning:hover {
    background: #e0a800;
}

.btn-small {
    padding: 5px 15px;
    font-size: 12px;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Navbar */
.navbar {
    background: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 15px 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    font-size: 20px;
    font-weight: bold;
    color: #667eea;
}

.nav-links {
    display: flex;
    gap: 20px;
}

.nav-link {
    color: #555;
    text-decoration: none;
    padding: 5px 10px;
    border-radius: 5px;
    transition: all 0.3s;
}

.nav-link:hover {
    background: #f0f0f0;
}

.nav-link.active {
    background: #667eea;
    color: white;
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 15px;
}

.nav-user span {
    font-weight: 500;
    color: #555;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 30px auto;
    padding: 0 30px;
}

/* Tab Content */
.tab-content {
    display: none;
    background: white;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.tab-content.active {
    display: block;
}

.tab-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.tab-header h2 {
    color: #333;
}

/* Cards Grid */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 20px;
}

.device-card {
    background: white;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 20px;
    transition: all 0.3s;
}

.device-card:hover {
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.device-card.offline {
    opacity: 0.6;
}

.device-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 15px;
}

.device-name {
    font-size: 18px;
    font-weight: bold;
    color: #333;
}

.device-status {
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.device-status.online {
    background: #d4edda;
    color: #155724;
}

.device-status.offline {
    background: #f8d7da;
    color: #721c24;
}

.device-info {
    margin-bottom: 15px;
}

.device-info-item {
    display: flex;
    justify-content: space-between;
    padding: 5px 0;
    font-size: 14px;
}

.device-info-item span:first-child {
    color: #666;
}

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

.device-actions .btn {
    flex: 1;
}

/* Data Tables */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead {
    background: #f8f9fa;
}

.data-table th {
    padding: 12px;
    text-align: left;
    font-weight: 600;
    color: #555;
    border-bottom: 2px solid #e0e0e0;
}

.data-table td {
    padding: 12px;
    border-bottom: 1px solid #e0e0e0;
}

.data-table tbody tr:hover {
    background: #f8f9fa;
}

/* Avatar Display */
.avatar-display {
    display: flex;
    align-items: center;
    gap: 10px;
}

.avatar-img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.avatar-link {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

.avatar-link:hover {
    text-decoration: underline;
}

/* Filter Bar */
.filter-bar {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.filter-select {
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
}

.search-input {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
}

/* Log Tabs */
.log-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.log-tab-btn {
    padding: 10px 20px;
    border: 1px solid #ddd;
    background: white;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s;
}

.log-tab-btn.active {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

.log-content {
    display: none;
}

.log-content.active {
    display: block;
}

/* Modals */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    display: none;
    background: white;
    border-radius: 10px;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal.active {
    display: block;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid #e0e0e0;
}

.modal-header h3 {
    color: #333;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: #999;
}

.modal-close:hover {
    color: #333;
}

.modal form {
    padding: 20px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 20px;
    border-top: 1px solid #e0e0e0;
}

/* API Key Display */
.api-key-display {
    padding: 20px;
    background: #f8f9fa;
    border-top: 1px solid #e0e0e0;
}

.api-key-display code {
    display: block;
    background: white;
    padding: 10px;
    border-radius: 5px;
    word-break: break-all;
    font-family: monospace;
    margin: 10px 0;
}

.api-key-display .warning {
    color: #856404;
    background: #fff3cd;
    padding: 10px;
    border-radius: 5px;
    margin-top: 10px;
}

/* Error Message */
.error-message {
    color: #dc3545;
    font-size: 14px;
    margin-top: 10px;
}

/* Success Message */
.success-message {
    color: #28a745;
    font-size: 14px;
    margin-top: 10px;
}

/* Badge */
.badge {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success {
    background: #d4edda;
    color: #155724;
}

.badge-danger {
    background: #f8d7da;
    color: #721c24;
}

.badge-warning {
    background: #fff3cd;
    color: #856404;
}

.badge-info {
    background: #d1ecf1;
    color: #0c5460;
}

/* Admin Only Elements */
.admin-only {
    /* Will be hidden by JS for non-admin users */
}

/* Responsive */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .cards-grid {
        grid-template-columns: 1fr;
    }
    
    .filter-bar {
        flex-direction: column;
    }
    
    .tab-header {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }
}

/* Loading Spinner */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(102, 126, 234, 0.3);
    border-radius: 50%;
    border-top-color: #667eea;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #999;
}

.empty-state-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.empty-state-text {
    font-size: 18px;
}

/* Action Buttons in Tables */
.action-btns {
    display: flex;
    gap: 5px;
}

.action-btns .btn {
    padding: 5px 10px;
    font-size: 12px;
}

/* Notes Preview */
.notes-preview {
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}