body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: #f4f4f9;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    padding: 20px;
    width: 90%;
    max-width: 800px;
}

h1, h2 {
    color: #333;
    text-align: center;
}

input, button {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}
button {
    background-color: #4CAF50;
    color: white;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #45a049;
}

.error {
    color: red;
    text-align: center;
}

.user-info {
    font-weight: bold;
    color: #333;
    margin-bottom: 10px;
}

.chart-container {
    margin: 20px 0;
    background-color: #f9f9f9;
    padding: 10px;
    border-radius: 4px;
}

#entries-list {
    list-style: none;
    padding: 0;
    margin: 10px 0 0 0;
}

.entry-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    background-color: #fff;
    margin: 10px 0;
}

.entry-text {
    flex: 1;
}

.entry-delete {
    width: auto;
    margin: 0;
    padding: 8px 12px;
    background-color: #e53935;
}

.entry-delete:hover {
    background-color: #d32f2f;
}

#auth-section, #data-section, #charts-section {
    margin: 20px;
    padding: 20px;
    border: 1px solid #ddd;
    border-radius: 4px;
}