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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    background: rgba(255, 255, 255, 0.95);
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

h1 {
    color: #2c3e50;
    font-size: 2.5em;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 10px;
}

#connection-status {
    padding: 8px 16px;
    border-radius: 20px;
    background: #27ae60;
    color: white;
    font-weight: bold;
}

.devices-section, .onboarding-section {
    background: rgba(255, 255, 255, 0.95);
    padding: 30px;
    border-radius: 10px;
    margin-bottom: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

h2 {
    color: #2c3e50;
    margin-bottom: 20px;
    font-size: 1.8em;
}

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

.device-card {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    border-left: 4px solid #3498db;
    transition: all 0.3s ease;
    display: flex;
    align-items: flex-start;
    gap: 15px;
    position: relative;
}

.device-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
}

.device-checkbox-container {
    margin-top: 5px;
}

.device-checkbox {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: #3498db;
}

.device-content {
    flex: 1;
    cursor: pointer;
}

.device-card.online {
    border-left-color: #27ae60;
}

.device-card.offline {
    border-left-color: #e74c3c;
}

.device-name {
    font-weight: bold;
    font-size: 1.2em;
    color: #2c3e50;
    margin-bottom: 10px;
}

.device-info {
    font-size: 0.9em;
    color: #7f8c8d;
    margin-bottom: 5px;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
}

.modal-content {
    background-color: #fefefe;
    margin: 5% auto;
    padding: 30px;
    border-radius: 10px;
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
    overflow-y: auto;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close:hover {
    color: #000;
}

.device-info {
    margin: 20px 0;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
}

.device-info p {
    margin: 10px 0;
    font-size: 1em;
}

.app-controls, .system-controls {
    margin: 30px 0;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 8px;
}

.app-controls h4, .system-controls h4 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 1.2em;
}

.control-group {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s ease;
}

.btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

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

.btn-danger { background: #e74c3c; color: white; }
.btn-warning { background: #f39c12; color: white; }
.btn-info { background: #3498db; color: white; }
.btn-secondary { background: #95a5a6; color: white; }
.btn-dark { background: #34495e; color: white; }

.form-control {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
    min-width: 200px;
}

.pending-device {
    background: #fff3cd;
    border: 1px solid #ffeaa7;
    padding: 15px;
    margin-bottom: 10px;
    border-radius: 5px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.approve-btn {
    background: #27ae60;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    transition: background 0.3s;
}

.approve-btn:hover {
    background: #229954;
}

.disapprove-btn {
    background: #e74c3c;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    transition: background 0.3s;
}

.disapprove-btn:hover {
    background: #c0392b;
}

.pending-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: flex-end;
}

.approve-form {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}

.model-select {
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 0.9em;
    min-width: 200px;
}

.customer-input {
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 0.9em;
    min-width: 150px;
}

.model-select:focus,
.customer-input:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 5px rgba(52, 152, 219, 0.3);
}

.delete-selected-btn {
    background: #e74c3c;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    font-size: 1em;
    transition: all 0.3s ease;
}

.delete-selected-btn:hover {
    background: #c0392b;
    transform: translateY(-2px);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
}