:root {
    --primary-color: #4a6fa5;
    --secondary-color: #166088;
    --accent-color: #4fc3f7;
    --error-color: #f44336;
    --success-color: #4caf50;
    --background-color: #f5f5f5;
    --card-color: #ffffff;
    --text-color: #333333;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
}

h1 {
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 10px;
}

.last-update {
    text-align: center;
    color: #666;
    margin-bottom: 20px;
    font-size: 0.9em;
}

.controls {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 25px;
    flex-wrap: wrap;
}

button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
}

button:hover {
    background-color: var(--secondary-color);
}

#status-message {
    padding: 10px;
    border-radius: 4px;
    text-align: center;
    width: 100%;
    margin-top: 10px;
}

.success {
    background-color: #e8f5e9;
    color: var(--success-color);
}

.error {
    background-color: #ffebee;
    color: var(--error-color);
}

.data-container {
    background-color: var(--card-color);
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    overflow-x: auto;
}

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

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

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

tr:hover {
    background-color: #f5f5f5;
}

.action-btn {
    background-color: var(--accent-color);
    padding: 5px 10px;
    margin: 0 5px;
    font-size: 14px;
}

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

.modal-content {
    background-color: var(--card-color);
    padding: 30px;
    border-radius: 8px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input, .form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 30px;
}

@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    th, td {
        padding: 8px 10px;
    }
    
    .modal-content {
        padding: 20px;
    }
}

/* PWA specific styles */
#install-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: white;
    padding: 10px;
    border-radius: 5px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
    display: none;
}

#install-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 8px 15px;
    border-radius: 4px;
    cursor: pointer;
}