.toggles { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 15px; }
.toggle-group { 
    border: 1px solid var(--line); padding: 8px 12px; border-radius: 0px; 
    background: var(--surface-panel);
}
.toggle-group span { 
    display: block; color: var(--deg-third); font-size: 0.75em; margin-bottom: 6px; 
    text-transform: uppercase; letter-spacing: 1.5px; font-weight: 700;
}
.toggle-group button { 
    padding: 4px 8px; font-size: 11px; margin: 2px;
    font-weight: 700;
    text-transform: none;
}

.legend-box {
    margin: 18px auto 10px;
    padding: 12px 20px;
    max-width: 650px;
    background: var(--surface-panel);
    border-left: 4px solid var(--deg-root);
    border-top: 1px solid var(--line);
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    text-align: left;
}
.legend-box h3 {
    color: var(--deg-root);
    margin-top: 0;
    text-align: center;
    border-bottom: 1px solid var(--line);
    padding-bottom: 8px;
    font-family: 'Oswald', sans-serif;
    letter-spacing: 1px;
    font-size: 20px;
    text-transform: uppercase;
}
.legend-box ul {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: repeat(6, auto);
    grid-auto-flow: column;
    gap: 10px 15px;
}
.legend-box li {
    color: var(--control-ink);
    font-size: 11px;
    font-weight: 600;
    display: flex;
    align-items: center;
}
.legend-box li b {
    display: inline-block;
    width: 32px;
    text-align: center;
    background: var(--surface-control);
    color: var(--action);
    border: 1px solid var(--line-strong);
    padding: 3px 5px;
    margin-right: 10px;
    border-radius: 2px;
    font-weight: 800;
    font-family: 'Montserrat', sans-serif;
    text-transform: none;
}

/* ---- "What you play" panel: tabs ---- */
.tabs { display: grid; grid-template-columns: 1fr 1fr; gap: 0; width: 100%; border-bottom: 1px solid var(--line-strong); margin-bottom: 4px; }
.tabs .tab { border: none; border-bottom: 2px solid transparent; background: transparent; padding: 8px 4px; font-size: 11px; border-radius: 0; }
.tabs .tab.active { background: transparent; color: var(--text-strong); border-bottom-color: var(--deg-root); box-shadow: none; }
.preset-grid { display: flex; flex-wrap: wrap; gap: 4px; width: 100%; justify-content: flex-start; }
.preset-grid[hidden] { display: none; }
/* chips sized to their name: no half-empty rows, every button one line */
.preset-grid button { flex: 0 0 auto; padding: 7px 11px; font-size: 10.5px; white-space: nowrap; }
.preset-grid .grp-label {
    flex-basis: 100%; text-align: left; font-size: 9.5px; letter-spacing: 1.5px;
    text-transform: uppercase; color: var(--group-label); margin: 6px 0 0; font-weight: 700;
}
.preset-grid .grp-label:first-child { margin-top: 2px; }
.preset-clear {
    width: 100%; text-align: right; margin-top: 4px; padding: 4px 2px; font-size: 10px;
    background: transparent; border: none; color: var(--destructive);
}
.preset-clear:hover { background: transparent; color: var(--destructive); text-decoration: underline; }

/* ---- Collapsible sections ---- */
details.collapsible { display: block; }
details.collapsible > summary,
details.legend-box > summary {
    list-style: none; cursor: pointer; user-select: none;
    display: flex; justify-content: space-between; align-items: center;
}
details > summary::-webkit-details-marker { display: none; }
details.collapsible > summary {
    font-family: 'Oswald', sans-serif; font-size: 14px; color: var(--text-strong);
    text-transform: uppercase; letter-spacing: 1.5px; font-weight: 600; text-align: left;
}
details.collapsible > summary::after,
details.legend-box > summary::after { content: '+'; color: var(--deg-third); font-size: 18px; line-height: 1; }
details[open].collapsible > summary::after,
details[open].legend-box > summary::after { content: '–'; }
.collapsible-body { display: flex; flex-direction: column; gap: 6px; margin-top: 10px; }
.collapsible-body .toggles { margin-top: 4px; gap: 4px; }
.collapsible-body .toggle-group { padding: 6px 6px; flex: 1 1 auto; }
.collapsible-body .toggle-group span { font-size: 0.65em; margin-bottom: 4px; }
.collapsible-body .toggle-group button { padding: 3px 6px; margin: 1px; font-size: 10px; }

details.legend-box > summary {
    color: var(--deg-root); font-family: 'Oswald', sans-serif; letter-spacing: 1px;
    font-size: 16px; text-transform: uppercase;
}
details[open].legend-box > summary { border-bottom: 1px solid var(--line); padding-bottom: 8px; margin-bottom: 4px; }


/* ---- Bar under the neck: labels, shell, interval chips ---- */
.view-bar { display: flex; flex-direction: column; align-items: center; gap: 8px; margin-top: 4px; }
.view-buttons { display: flex; gap: 6px; justify-content: center; flex-wrap: wrap; }
.view-buttons .shell-btn { width: auto; padding: 8px 16px; }
.view-buttons .bar-play { padding: 8px 18px; font-size: 12px; background: var(--action); color: var(--on-action); border-color: var(--action); min-width: 92px; }
.view-buttons .bar-play.playing { background: var(--deg-root); border-color: var(--deg-root); color: var(--on-deg-root); }
.view-bar .toggles { margin-top: 0; }
.hint { font-size: 10px; color: var(--ink-muted); letter-spacing: 0.5px; }
.board-hint { margin-top: -6px; }
body.study .board-hint, body.quiz .board-hint { display: none; }   /* in the quiz a double-click does not change the root */

/* "Edit notes": the per-degree chips, closed by default */
.edit-notes { width: 100%; margin-top: 8px; text-align: left; }
.edit-notes > summary { cursor: pointer; list-style: none; font-size: 10px; font-weight: 700; color: var(--action); letter-spacing: 0.5px; }
.edit-notes > summary::-webkit-details-marker { display: none; }
.edit-notes > summary::before { content: '+ '; }
.edit-notes[open] > summary::before { content: '– '; }
.edit-notes .toggles { margin-top: 8px; justify-content: flex-start; gap: 4px; }
.edit-notes .toggle-group { padding: 5px 6px; }
.edit-notes .toggle-group span { font-size: 0.65em; margin-bottom: 3px; }
.edit-notes .toggle-group button { padding: 3px 6px; margin: 1px; font-size: 10px; }
.preset-grid .grp-sub { flex-basis: 100%; text-align: left; font-size: 9px; letter-spacing: 1px; color: var(--ink-muted); margin: 2px 0 -1px; font-weight: 700; }