:root {
    --blue: #007aff;
    --text: #111;
    --muted: #666;
    --bg: #fff;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
    background: var(--bg);
    color: var(--text);
}

.wrap {
    padding: 24px;
    max-width: 720px;
    margin: 0 auto;
}

.lead {
    margin-top: 8px;
}

.btn {
    display: inline-block;
    padding: 12px 16px;
    background: var(--blue);
    color: #fff;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 600;
    line-height: 1;
}

    .btn:active {
        transform: translateY(1px);
    }

.hint {
    margin-top: 16px;
    color: var(--muted);
}

.sep {
    margin: 24px 0;
    opacity: 0.3;
}

.notes {
    color: var(--muted);
    line-height: 1.5;
}