:root {
    color-scheme: light;
}

html,
body {
    margin: 0;
    padding: 0;
    font-family: system-ui, Segoe UI, Roboto, Arial, sans-serif;
}

.card {
    width: min(560px, 92vw);
    background: #f9f9f9;
    color: #222;
    border: 1px solid #000;
    border-radius: 12px;
    padding: 18px 20px 16px;
    box-shadow: 0 12px 28px rgba(0, 0, 0, .28);
    line-height: 1.4;
    font-size: 15px;
}

.actions {
    margin-top: 14px;
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    position: relative;
    background: #f9f9f9;
    color: #222;
    border: 1px solid #000;
    border-radius: 12px;
    padding: 8px 16px;
    font-weight: 600;
    cursor: pointer;
}

.btn:hover {
    background: #eee;
}

.notice {
    margin: 12px 0;
    padding: 10px 12px;
    border-radius: 10px;
    background: #fff3cd;
    border: 1px solid #ffe69c;
    color: #3d2e00;
    font-size: 14px;
}