body {
    padding-bottom: 4rem;
}

main.container > article,
main.container > div {
    margin-top: 2.5rem;
}

#drop-zone {
    border: 2px dashed var(--secondary);
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: background-color 0.2s ease-in-out, border-color 0.2s ease-in-out;
}

#drop-zone.dragover {
    background-color: var(--secondary-hover);
    border-color: var(--primary);
}

#status {
    margin-top: 1rem;
    font-style: italic;
    color: var(--muted-color);
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.results-header h3 {
    margin: 0;
}

.custom-switcher {
    display: inline-flex;
    border: 1px solid hsl(215, 15%, 25%);
    border-radius: var(--border-radius);
    overflow: hidden;
    background-color: hsl(220, 15%, 15%);
    font-size: 0.9em;
}

.switcher-option {
    padding: 0.6rem 1.2rem;
    cursor: pointer;
    color: var(--muted-color);
    text-decoration: none;
    transition: background-color 0.2s, color 0.2s;
    white-space: nowrap;
}

.switcher-option + .switcher-option {
    border-left: 1px solid hsl(215, 15%, 25%);
}

.switcher-option:not(.active):hover {
    background-color: hsl(220, 15%, 20%);
}

.switcher-option.active {
    background-color: var(--primary-focus);
    color: var(--primary-inverse);
}

.instrument-block {
    margin-bottom: 2rem;
}

.instrument-block h4 {
    border-bottom: 2px solid var(--primary-focus);
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
}

.track-block {
    margin-bottom: 1rem;
}

.track-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    background-color: var(--card-background-color);
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    border: 1px solid var(--card-border-color);
    border-bottom: none;
}

.track-header strong {
    font-size: 1.1em;
}

.track-meta {
    font-size: 0.9em;
    color: var(--muted-color);
}

.track-meta span {
    margin-left: 1.5rem;
}

.track-textarea {
    width: 100%;
    height: 150px;
    resize: vertical;
    font-family: var(--font-mono);
    font-size: 0.9em;
    padding: 1rem;
    border-top-left-radius: 0;
    border-top-right-radius: 0;
    background-color: var(--card-background-color);
}

footer {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--card-border-color);
}

footer small {
    color: var(--muted-color);
    line-height: 1.6;
}

footer small p {
    margin-bottom: 0.75rem;
}

footer small a {
    color: var(--secondary);
    text-decoration: underline;
    text-decoration-style: dotted;
    text-underline-offset: 2px;
}

footer small a:hover {
    color: var(--primary);
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

#play-all-button {
    padding-top: 0.6rem;
    padding-bottom: 0.6rem;
}

.track-play-button {
    --pico-font-size: 0.8em;
    padding: 0.2rem 0.6rem;
    margin-left: auto;
}

#now-playing-zone {
    padding: 0.75rem 1rem;
    min-height: auto;
    margin-bottom: 1rem;
}

#now-playing-output {
    min-height: 100px;
    background: var(--card-background-color);
    border: 1px solid var(--card-border-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-bottom: 1rem;
}

#now-playing-zone .playing-instrument,
.playing-instrument {
    font-size: 0.9em;
    margin-bottom: 0.25rem;
    text-align: left;
}

#now-playing-zone .playing-instrument-name,
.playing-instrument-name {
    font-weight: bold;
    margin-right: 0.75rem;
    color: var(--primary);
}

.playing-notes {
    display: inline-block;
    min-width: 100px;
    text-align: left;
}

.toast-notification {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--card-background-color);
    color: var(--primary-inverse);
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--primary-focus);
    box-shadow: var(--card-box-shadow);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease-in-out, visibility 0.3s ease-in-out, top 0.3s ease-in-out;
}

.toast-notification.show {
    top: 40px;
    opacity: 1;
    visibility: visible;
}

.track-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.75rem;
}

.track-controls label {
    margin-bottom: 0;
    font-size: 0.9em;
    white-space: nowrap;
}

.track-controls select {
    margin-bottom: 0;
    font-size: 0.9em;
    flex-grow: 1;
}

.track-controls .track-delete-button {
    margin-left: auto;
    padding: 0.2rem 0.6rem;
    font-size: 0.8em;
    --pico-font-size: 0.8em;
}

#tracks-container textarea {
    font-size: 0.9em;
}

.track-selection-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    padding: 0 1rem;
}

.track-header .track-checkbox,
.track-controls .track-checkbox {
    margin: 0;
    width: 1.2rem;
    height: 1.2rem;
    margin-right: 0.5rem;
}

.playback-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding-bottom: 1rem;
}

.play-pause-button {
    padding: 0.5rem;
    width: 50px;
    height: 50px;
    font-size: 1.5em;
    line-height: 1;
    flex-shrink: 0;
}

.progress-display {
    flex-grow: 1;
}

.progress-bar-container {
    width: 100%;
}

.progress-bar-container input[type="range"] {
    margin: 0;
    padding: 0;
    height: 8px;
}

.progress-text-container {
    display: flex;
    justify-content: space-between;
    font-size: 0.85em;
    color: var(--muted-color);
    margin-top: 0.25rem;
    font-family: var(--font-mono);
}

.controls-right {
    display: flex;
    justify-content: flex-end;
    gap: var(--pico-form-element-spacing-horizontal);
}

.transpose-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    background-color: var(--card-background-color);
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    border: 1px solid var(--card-border-color);
}

.transpose-controls fieldset {
    margin-bottom: 0;
    padding: 0;
    border: none;
}

.transpose-controls label {
    margin-right: 0.5rem;
    font-size: 0.9em;
}

.transpose-slider-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-grow: 1;
    transition: opacity 0.2s ease-in-out;
}

.transpose-slider-container.disabled {
    opacity: 0.5;
    pointer-events: none;
}

.transpose-slider-container input[type="range"] {
    margin-bottom: 0;
    flex-grow: 1;
}

.transpose-value {
    font-family: var(--font-mono);
    font-size: 1em;
    font-weight: bold;
    width: 3ch;
    text-align: center;
}