body {
    font-family: system-ui, sans-serif;
    background: #f0f7f4;
    padding: 2rem;
}
.container {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    border-radius: 2rem;
    padding: 2rem;
    box-shadow: 0 15px 35px rgba(0,0,0,0.1);
}
input, button {
    width: 100%;
    padding: 0.8rem;
    margin: 0.5rem 0;
    border-radius: 2rem;
    border: 1px solid #ccc;
}
button {
    background: #2e7d64;
    color: white;
    border: none;
    cursor: pointer;
}
button:disabled {
    background: #aaa;
}
.video-switch button {
    width: auto;
    margin-right: 1rem;
}
iframe {
    width: 100%;
    aspect-ratio: 16/9;
    margin: 1rem 0;
}
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px,1fr));
    gap: 1rem;
}
.question {
    background: #f9f9f9;
    padding: 1rem;
    border-radius: 1rem;
    margin: 1rem 0;
}


/* выравнивание чекбокса и текста по левому краю */
label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: flex-start; /* прижимаем влево */
    margin: 1.5rem 0;
    font-size: 1rem;
}