/* ============================================
   BAND — identico nell'app docente e nell'app utente.
   Solo variabili dell'app (--primary, --superficie, --gray-*): regge il tema scuro.
   ============================================ */

.band { max-width: 980px; margin: 0 auto; }

.band-hero { display: flex; align-items: center; gap: .9rem; margin-bottom: 1rem; }
.band-hero h2 { font-size: 1.35rem; font-weight: 700; margin: 0; }
.band-hero p { margin: 0; color: var(--gray-600); font-size: .9rem; }
.band-hero-icona {
    flex-shrink: 0; width: 52px; height: 52px; border-radius: 16px;
    display: grid; place-items: center; font-size: 1.6rem;
    background: var(--primary-tinta); color: var(--primary-testo);
}

.band-sezione {
    font-size: .75rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em;
    color: var(--gray-600); margin: 0 0 .6rem;
}

/* ---- caricamento dei suoni ---- */
.band-caricamento { margin: .25rem 0 1rem; color: var(--gray-700); }
.band-caricamento .progress { height: 8px; }
.band-caricamento.errore { color: var(--danger); }
.band-caricamento.errore .progress-bar { background: var(--danger); animation: none; }

/* ---- elenco ---- */
.band-voci { display: flex; flex-direction: column; gap: .5rem; }
.band-voce {
    display: flex; align-items: center; gap: .8rem; width: 100%; text-align: left;
    padding: .8rem .9rem; border-radius: 12px; border: 1px solid var(--gray-200);
    background: var(--superficie); color: inherit;
}
.band-voce:active { transform: scale(.99); }
.band-voce-icona {
    flex-shrink: 0; width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center;
    background: var(--primary-tinta); color: var(--primary-testo); font-size: 1.15rem;
}
.band-voce-corpo { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.band-voce-titolo { font-weight: 600; }
.band-voce-meta { font-size: .8rem; color: var(--gray-600); }
.band-voce-accordi { font-size: .85rem; color: var(--gray-700); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.band-vuoto { text-align: center; color: var(--gray-600); padding: 1.5rem 1rem; }
.band-vuoto i { font-size: 2rem; display: block; margin-bottom: .5rem; color: var(--gray-400); }

/* ---- palco ---- */
.band-palco { margin-bottom: 1rem; }
.band-titolo { font-size: 1.15rem; font-weight: 600; border: 0; border-bottom: 1px solid var(--gray-200); border-radius: 0; padding-left: 0; margin-bottom: .9rem; background: transparent; }
.band-titolo:focus { box-shadow: none; border-bottom-color: var(--primary-testo); }
.band-titolo-testo { font-size: 1.25rem; font-weight: 700; margin: 0; }

.band-trasporto { display: flex; align-items: center; gap: .6rem; flex-wrap: wrap; margin: .9rem 0; }
.band-play, .band-finale { display: inline-flex; align-items: center; gap: .35rem; border-radius: 999px; font-weight: 600; }
.band-play { padding: .65rem 1.6rem; font-size: 1.05rem; min-width: 128px; justify-content: center; }
.band-play i { font-size: 1.3rem; line-height: 1; }
.band-finale { padding: .55rem 1rem; }
.band-finale.active { background: var(--warning); border-color: var(--warning); color: #fff; }
.band-posizione { flex: 1 1 100%; color: var(--gray-600); font-size: .85rem; font-variant-numeric: tabular-nums; min-height: 1.3em; }
@media (min-width: 576px) { .band-posizione { flex: 1; } }

.band-griglia { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 6px; }
.band-battuta {
    position: relative; min-height: 62px; padding: 18px 4px 8px; border-radius: 10px;
    border: 1px solid var(--gray-200); background: var(--superficie); color: inherit;
    display: flex; align-items: center; justify-content: center; transition: background .08s, border-color .08s;
}
.band-griglia:not(.scrivibile) .band-battuta { cursor: default; }
.band-battuta-num { position: absolute; top: 3px; left: 7px; font-size: .68rem; color: var(--gray-500); }
.band-battuta-acc { display: flex; gap: .45rem; flex-wrap: wrap; justify-content: center; font-weight: 700; font-size: 1.05rem; line-height: 1.15; }
.band-battuta.corrente { background: var(--primary-tinta); border-color: var(--primary-testo); box-shadow: inset 0 0 0 1px var(--primary-testo); }
.band-aggiungi { border-style: dashed; color: var(--gray-500); font-size: 1.3rem; padding-top: 8px; }
.band-errori { color: var(--danger); margin-top: .5rem; }
.band-errori:empty { display: none; }
.band-aiuto { margin-top: .6rem; }

/* ---- controlli ---- */
.band-colonne { display: grid; gap: 1rem; }
@media (min-width: 992px) { .band-colonne { grid-template-columns: 1fr 1fr; align-items: start; } }
.band-colonne .card { margin-bottom: 0; }

.band-stili { display: flex; gap: .4rem; overflow-x: auto; padding-bottom: .3rem; margin-bottom: .9rem; scrollbar-width: thin; }
@media (min-width: 576px) { .band-stili { flex-wrap: wrap; overflow: visible; } }
.band-chip {
    flex-shrink: 0; border: 1px solid var(--gray-300); background: var(--superficie); color: inherit;
    border-radius: 999px; padding: .35rem .85rem; font-size: .88rem; white-space: nowrap;
}
.band-chip.attivo { background: var(--primary); border-color: var(--primary); color: #fff; }

.band-controllo { margin-bottom: .9rem; }
.band-controllo > label { display: block; font-size: .85rem; color: var(--gray-600); margin-bottom: .25rem; }
.band-regola { display: flex; align-items: center; gap: .5rem; }
.band-regola .btn { width: 38px; height: 38px; padding: 0; border-radius: 50%; flex-shrink: 0; }
.band-regola .form-range { flex: 1; }
.band-valore { min-width: 74px; text-align: right; font-variant-numeric: tabular-nums; }
.band-interruttori { display: flex; flex-wrap: wrap; gap: .25rem 1.25rem; margin-bottom: .9rem; }

.band-testo summary { color: var(--primary-testo); cursor: pointer; font-size: .9rem; margin-bottom: .5rem; }
.band-giro-testo { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .9rem; }

/* ---- mixer ---- */
.band-traccia {
    display: grid; grid-template-columns: auto 1fr minmax(0, 1.2fr); gap: .35rem .6rem; align-items: center;
    padding: .55rem 0; border-top: 1px solid var(--gray-200);
}
.band-traccia:first-child { border-top: 0; padding-top: 0; }
.band-traccia .band-volume { grid-column: 2 / -1; }
@media (min-width: 576px) {
    .band-traccia { grid-template-columns: auto 120px minmax(0, 1fr) 110px; }
    .band-traccia .band-volume { grid-column: auto; }
}
.band-traccia-nome { font-weight: 600; display: flex; align-items: center; gap: .4rem; }
.band-traccia-nome i { color: var(--primary-testo); }
.band-traccia.spenta .band-traccia-nome, .band-traccia.spenta select, .band-traccia.spenta .band-volume { opacity: .45; }

/* ---- azioni ---- */
.band-azioni { margin: 1rem 0; }
.band-assegnata { color: var(--gray-700); margin-bottom: .6rem; }
.band-salva.band-da-salvare { box-shadow: 0 0 0 3px var(--primary-tinta); }
.band-salva.band-da-salvare::after { content: ' \2022'; }
.band-crediti { font-size: .72rem; color: var(--gray-500); margin: 1.25rem 0 .5rem; }

/* ---- modali ---- */
.band-scelta-anteprima { display: flex; gap: .5rem; justify-content: center; font-size: 1.9rem; font-weight: 700; margin-bottom: .75rem; }
.band-scelta-anteprima span { padding: 0 .4rem; border-radius: 8px; }
.band-scelta-anteprima span.attivo { background: var(--primary-tinta); }
.band-scelta-note { display: grid; grid-template-columns: repeat(6, 1fr); gap: 6px; }
.band-scelta-note .btn { padding: .5rem 0; font-weight: 600; }
.band-scelta-qualita { display: flex; flex-wrap: wrap; gap: 6px; }
.band-assegna-riga { display: flex; gap: .7rem; align-items: flex-start; padding: .55rem .25rem; border-bottom: 1px solid var(--gray-200); cursor: pointer; }
.band-assegna-riga .form-check-input { margin-top: .2rem; flex-shrink: 0; }