body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: #f0f2f5;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container {
    background-color: #fff;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    text-align: center;
}

h1 {
    color: #1c1e21;
    margin-bottom: 1.5rem;
}

.input-container {
    display: flex;
    gap: 0.5rem;
}

#videoUrl {
    flex-grow: 1;
    padding: 0.75rem;
    border: 1px solid #dddfe2;
    border-radius: 6px;
    font-size: 1rem;
}

#downloadBtn {
    background-color: #1877f2;
    color: #fff;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s;
}

#downloadBtn:hover {
    background-color: #166fe5;
}

#formatsContainer {
    margin-top: 1.5rem;
}

.formats-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.format-button {
    background-color: #e7f3ff;
    color: #1877f2;
    border: 1px solid #1877f2;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background-color 0.3s, color 0.3s;
}

.format-button:hover {
    background-color: #1877f2;
    color: #fff;
}