:root {
    --bg-color: #f0f2f5;
    --header-bg: #fff;
    --card-bg: #fff;
    --text-color: #333;
    --secondary-text: #555;
    --border-color: #ddd;
    --shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    --bg-color: #1a1a1a;
    --header-bg: #2d2d2d;
    --card-bg: #2d2d2d;
    --text-color: #e0e0e0;
    --secondary-text: #b0b0b0;
    --border-color: #444;
    --shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
}

header {
    background-color: var(--header-bg);
    padding: 20px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

h1 {
    margin: 0;
    font-size: 2em;
}

#theme-toggle {
    padding: 10px 15px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    background-color: #333;
    color: #fff;
    font-weight: bold;
}

[data-theme="dark"] #theme-toggle {
    background-color: #f0f2f5;
    color: #333;
}

main {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.chart-container {
    background-color: var(--card-bg);
    padding: 20px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.analysis-form-container {
    background-color: var(--card-bg);
    padding: 20px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

.analysis-form-container h2 {
    margin-top: 0;
    color: var(--text-color);
}

.form-group {
    margin-bottom: 15px;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.form-group label {
    font-weight: bold;
    color: var(--secondary-text);
}

.form-group input {
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--bg-color);
    color: var(--text-color);
}

.submit-btn {
    padding: 12px 20px;
    border: none;
    border-radius: 4px;
    background-color: #007bff;
    color: white;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.2s;
}

.submit-btn:hover {
    background-color: #0056b3;
}

.metrics-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.metric {
    background-color: var(--card-bg);
    padding: 20px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    text-align: center;
}

.metric h2 {
    margin: 0 0 10px;
    font-size: 1.2em;
    color: var(--secondary-text);
}

.metric p {
    margin: 0;
    font-size: 2em;
    font-weight: bold;
}

.comments-section {
    background-color: var(--card-bg);
    padding: 20px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    margin-top: 20px;
}

@media (min-width: 768px) {
    main {
        flex-direction: row;
        align-items: flex-start;
    }

    .chart-container {
        flex: 2;
    }

    .metrics-container {
        flex: 1;
        grid-template-columns: 1fr;
    }
}