:root {
    --bg: #fafafa;
    --fg: #1a1a1a;
    --muted: #666;
    --accent: #2563eb;
    --border: #d4d4d8;
    --code-bg: #f0f0f0;
}

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

body {
    font-family:
        system-ui,
        -apple-system,
        sans-serif;
    font-size: 1.2rem;
    background: var(--bg);
    color: var(--fg);
    line-height: 1.6;
}

main {
    max-width: 48rem;
    margin: 2rem auto;
    padding: 0 1rem;
}

h1 {
    margin-bottom: 0.25rem;
    font-size: 3.7rem;
}
.subtitle {
    color: var(--muted);
    margin-bottom: 2rem;
}

h2 {
    margin-bottom: 0.5rem;
    font-size: 2.4rem;
}

section {
    margin-bottom: 5rem;
    margin-top: 2rem;
}

.input-row {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 0.5rem;
}

label {
    font-weight: 600;
}

input,
select,
textarea {
    font-family: inherit;
    font-size: 1.1rem;
    padding: 0.4rem 0.6rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: #fff;
}

input[type="number"] {
    width: 10rem;
}

textarea {
    width: 100%;
    font-family: monospace;
    resize: vertical;
}

button {
    font-family: inherit;
    font-size: 0.95rem;
    padding: 0.4rem 1rem;
    border: none;
    border-radius: 4px;
    background: var(--accent);
    color: #fff;
    cursor: pointer;
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

button:not(:disabled):hover {
    opacity: 0.9;
}

.output {
    background: var(--code-bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.75rem;
    font-family: monospace;
    font-size: 1.1rem;
    white-space: pre-wrap;
    word-break: break-all;
    max-height: 24rem;
    overflow: auto;
    margin-top: 0.5rem;
}

#status {
    color: var(--muted);
    font-size: 0.85rem;
    margin-top: 1rem;
}