body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
    margin: 0;
    padding: 20px;
    background-color: #fafafa;
    color: #555;
    line-height: 1.6;
}

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

h1 {
    margin-top: 0;
    margin-bottom: 30px;
    color: #1E3A8A;
    font-size: 28px;
    font-weight: 600;
    border-bottom: 3px solid #E31E24;
    padding-bottom: 10px;
}

.controls {
    margin-bottom: 30px;
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    padding: 20px;
    background-color: #ffffff;
    border-left: 4px solid #E31E24;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

label {
    font-weight: 600;
    color: #333;
    font-size: 14px;
}

select {
    padding: 8px 12px;
    min-width: 250px;
    border: 1px solid #ddd;
    border-radius: 3px;
    font-size: 14px;
    background-color: white;
    cursor: pointer;
    transition: border-color 0.2s;
}

select:hover {
    border-color: #E31E24;
}

select:focus {
    outline: none;
    border-color: unset;
    box-shadow: unset;
}

#chart-container {
    width: calc(100% - 40px);
    height: 500px;
    margin-top: 20px;
    border: 1px solid #e0e0e0;
    background-color: #ffffff;
    padding: 20px;
}

.loading {
    text-align: center;
    padding: 50px;
    color: #888;
}

.download-button {
    height: 35px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    width: 100%;
    font-size: 14px;
    color: #555;
    text-decoration: none;
    border: 1px solid #ddd;
    border-radius: 3px;
    background-color: white;
    transition: all 0.2s;
    box-sizing: border-box;
    justify-content: center;
}

.download-button:hover {
    background-color: #fff;
    border-color: #E31E24;
}

.download-button svg {
    width: 14px;
    height: 14px;
}