:root {
    --header-bg: #1a1a2e;
    --header-text: white;
    --bg-primary: #f0f2f5;
    --bg-card: white;
    --text-primary: #1a1a2e;
    --text-secondary: #666;
    --input-bg: white;
    --input-border: #ddd;
}

@media (prefers-color-scheme: dark) {
    :root {
        --header-bg: #161b22;
        --header-text: #e6edf3;
        --bg-primary: #0d1117;
        --bg-card: #1a1a2e;
        --text-primary: #e6edf3;
        --text-secondary: #8b949e;
        --input-bg: #0d1117;
        --input-border: #30363d;
    }
}

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

body {
    font-family: sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    padding: 16px;
}

#app {
    max-width: 600px;
    margin: 0 auto;
}


header {
    background-color: var(--header-bg);
    color: var(--header-text);
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 16px;
}

section {
    background-color: var(--bg-card);
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 16px;
}

h1 { font-size: 24px; margin-bottom: 8px; }
h2 { font-size: 18px; margin-bottom: 16px; }

input, select {
    width: 100%;
    padding: 12px;
    margin-bottom: 12px;
    border: 1px solid var(--input-border);
    border-radius: 8px;
    font-size: 16px;
    background-color: var(--input-bg);
    color: var(--text-primary);
}

button {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    background-color: #4361ee;
    color: white;
    margin-bottom: 8px;
}

#clear-button {
    background-color: #e63946;
}