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

body {
    background: #fff;
    color: #212121;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    min-height: 100vh;
}

.app-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1004;
    background: #a970ff;
    color: #000;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0 5rem;
    height: 64px;
    box-shadow:
        0 2px 4px -1px rgba(0, 0, 0, 0.2),
        0 4px 5px 0 rgba(0, 0, 0, 0.14),
        0 1px 10px 0 rgba(0, 0, 0, 0.12);
}

.app-bar-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: #000;
    white-space: nowrap;
}

.app-bar-group {
    display: flex;
    gap: 0.4rem;
    flex-shrink: 0;
}

.chip {
    cursor: pointer;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    background: rgb(255 255 255 / 44%);
    color: #000;
    padding: 0.3rem 0.6rem;
    border-radius: 16px;
    white-space: nowrap;
    transition: background 0.15s;
}

.chip:hover {
    background: rgba(0, 0, 0, 0.25);
}

.chip:has(input:checked) {
    background: #2d2d2d;
    color: #fff;
}

.chip input[type="radio"] {
    display: none;
}

#input {
    background: rgb(255 255 255 / 70%);
    border: 1px solid transparent;
    color: #212121;
    padding: 0.35rem 0.7rem;
    border-radius: 4px;
    font-size: 0.85rem;
    min-width: 0;
    flex: 1;
    height: 40px;
}

#input:focus {
    outline: none;
    border-color: #000;
}

#input.invalid {
    border-color: #d32f2f;
    background: rgba(255, 255, 255, 0.5);
    color: #999;
}

#play-btn {
    background: #2d2d2d;
    color: #fff;
    border: none;
    padding: 0.35rem 1rem;
    border-radius: 4px;
    font-size: 0.85rem;
    cursor: pointer;
    white-space: nowrap;
    flex-shrink: 0;
}

#play-btn:hover {
    background: #222;
}

#play-btn:disabled {
    background: rgba(0, 0, 0, 0.3);
    cursor: not-allowed;
}

main {
    padding-top: 80px;
    padding-left: 5rem;
    padding-right: 5rem;
}

.error {
    color: #d32f2f;
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .app-bar {
        flex-wrap: wrap;
        height: auto;
        padding: 0.5rem 0.75rem;
        gap: 0.5rem;
    }

    #input {
        max-width: none;
        order: 10;
        flex-basis: 100%;
    }

    #play-btn {
        order: 11;
        flex-basis: 100%;
    }

    main {
        padding-top: 120px;
    }
}