/* ── Footer ─────────────────────────────────────────────── */
    footer.sm-footer {
      border-top: 1px solid var(--border);
      margin-top: 40px;
      padding: 28px 4px 18px;
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 1.5rem;
    }

    .sm-footer-mark {
      font-weight: 700;
      font-size: 15px;
      letter-spacing: .1em;
      color: var(--text);
    }

    .sm-footer-mark span {
      color: var(--teal);
    }

    .sm-footer-sub {
      font-size: 11px;
      color: var(--muted);
      margin-top: .3rem;
    }

    .sm-footer-links {
      display: flex;
      flex-direction: column;
      gap: .35rem;
    }

    .sm-footer-links a {
      font-size: 12px;
      color: var(--muted);
      text-decoration: none;
      transition: color .15s;
    }

    .sm-footer-links a:hover {
      color: var(--teal);
    }

    .sm-footer-copy {
      text-align: center;
      font-size: 10px;
      color: var(--border);
      padding: 0 4px 1rem;
      letter-spacing: .06em;
    }

    .sm-footer-copy a {
      color: var(--muted);
      text-decoration: none;
    }

    .sm-footer-copy a:hover {
      color: var(--teal);
    }

    /* ── Chord Editor ───────────────────────────────────────── */
    .ce-section {
      margin-bottom: 16px;
    }

    .ce-section-title {
      font-size: 10px;
      text-transform: uppercase;
      letter-spacing: .8px;
      color: var(--teal2);
      margin-bottom: 8px;
    }

    .ce-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }

    .chord-cell {
      background: var(--s2);
      border: 1px solid var(--border);
      border-radius: 7px;
      padding: 6px 8px;
      display: flex;
      flex-direction: column;
      gap: 4px;
      min-width: 90px;
    }

    .chord-cell.changed {
      border-color: var(--gold);
      background: rgba(255, 213, 79, .08);
    }

    .chord-cell select {
      background: var(--s3);
      border: 1px solid var(--border);
      color: var(--text);
      border-radius: 4px;
      padding: 3px 4px;
      font-size: 11px;
      width: 100%;
    }

    .chord-cell .ce-orig {
      font-size: 9px;
      color: var(--muted);
      text-align: center;
    }

    .ce-actions {
      padding: 10px 0 0;
      display: flex;
      gap: 8px;
      align-items: center;
      border-top: 1px solid var(--border);
      margin-top: 4px;
    }

    .ce-hint {
      font-size: 10px;
      color: var(--muted);
    }

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

    :root {
      /* Palette allineata alla styleguide (test — vedi nota nel README/commit):
         bg/testo/border in stile "GitHub dark", accento verde smeraldo neon. */
      --bg: #0D1117;
      --s1: #161B22;
      --s2: #1C2128;
      --s3: #262C36;
      --border: #21262D;
      --teal: #2ECC71;
      --teal2: #77DEA3;
      /* Terzo colore complementare (bg + verde + questo): blu accento in
         stile GitHub dark, sostituisce sia il vecchio viola che il vecchio
         blu — un solo accento secondario invece di due che stonavano
         con la nuova palette (test styleguide). */
      --purple: #58A6FF;
      --blue: #58A6FF;
      --gold: #FFD54F;
      --text: #F0F6FC;
      --muted: #8B949E;
      --ok: #66BB6A;
      --warn: #FFA726;
      --err: #EF5350;
      /* Colori strumento (S20) */
      --clr-drums: #FFD54F;
      --clr-bass: #2196F3;
      --clr-guitar: #F44336;
      --clr-piano: #4CAF50;
      --clr-ens: #FF9800;
    }

    body {
      background: var(--bg);
      color: var(--text);
      font-family: 'Ubuntu', 'Segoe UI', system-ui, sans-serif;
      min-height: 100vh;
      padding: 18px 14px;
    }

    #bg {
      position: fixed;
      inset: 0;
      width: 100%;
      height: 100%;
      display: block;
      z-index: 0;
      pointer-events: none;
    }

    .wrap {
      position: relative;
      z-index: 1;
      max-width: 1400px;
      margin: 0 auto;
    }

    /* Site nav — rimanda a johnwhale.com, stessa identità del sito */
    .site-nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 14px 0;
      margin-bottom: 4px;
      flex-wrap: wrap;
      gap: 10px;
    }

    .site-nav-logo {
      display: flex;
      align-items: center;
      gap: .5rem;
      font-weight: 700;
      font-size: 13px;
      letter-spacing: .12em;
      color: var(--text);
      text-decoration: none;
    }

    .site-nav-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--teal);
    }

    .site-nav-right {
      display: flex;
      align-items: center;
      gap: .75rem;
    }

    .site-nav-back {
      font-size: 11px;
      color: var(--muted);
      text-decoration: none;
      border: 1px solid var(--border);
      border-radius: 6px;
      padding: 4px 10px;
      transition: color .15s, border-color .15s;
    }

    .site-nav-back:hover {
      color: var(--teal);
      border-color: var(--teal);
    }

    .site-nav-tag {
      font-size: 10px;
      letter-spacing: .1em;
      color: var(--teal);
      border: 1px solid rgba(46, 204, 113, .3);
      border-radius: 4px;
      padding: 3px 8px;
    }

    /* Header */
    header {
      border-bottom: 1px solid var(--border);
      padding-bottom: 12px;
      margin-bottom: 20px;
      display: flex;
      align-items: center;
      gap: 14px;
      flex-wrap: wrap;
    }

    .logo-mark {
      display: flex;
      align-items: center;
      gap: 0;
      line-height: 1;
    }

    .logo-su {
      font-family: 'Ubuntu', system-ui, sans-serif;
      font-weight: 700;
      font-size: 26px;
      color: var(--muted);
      letter-spacing: -.5px;
    }

    .logo-midi {
      font-family: 'Ubuntu', system-ui, sans-serif;
      font-weight: 700;
      font-size: 26px;
      color: var(--teal);
      letter-spacing: -.5px;
    }

    .logo-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--teal);
      margin: 0 8px 2px;
      flex-shrink: 0;
    }

    header p {
      color: var(--muted);
      font-size: 11px;
    }

    /* Cards */
    .card {
      background: var(--s1);
      border: 1px solid var(--border);
      border-radius: 10px;
      padding: 16px 18px;
      margin-bottom: 16px;
    }

    .card-title {
      font-size: 10px;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--teal2);
      margin-bottom: 12px;
      font-weight: 700;
    }

    /* Form */
    .grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
      gap: 12px;
    }

    label {
      display: block;
      font-size: 10px;
      color: var(--muted);
      text-transform: uppercase;
      letter-spacing: .4px;
      margin-bottom: 4px;
    }

    select,
    input[type=number] {
      width: 100%;
      background: var(--s2);
      border: 1px solid var(--border);
      border-radius: 6px;
      color: var(--text);
      padding: 7px 9px;
      font-size: 13px;
      font-family: inherit;
    }

    select:focus,
    input:focus {
      outline: 2px solid var(--teal);
      border-color: transparent;
    }

    input[type=range] {
      width: 100%;
      accent-color: var(--teal);
      cursor: pointer;
      margin-top: 3px;
    }

    /* Module toggles */
    .mods {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
      margin-top: 10px;
    }

    .mt {
      display: flex;
      align-items: center;
      gap: 5px;
      padding: 4px 11px;
      border-radius: 16px;
      border: 1px solid var(--border);
      background: var(--s2);
      cursor: pointer;
      font-size: 11px;
      transition: all .15s;
      user-select: none;
    }

    .mt.on {
      border-color: var(--teal);
      background: rgba(38, 166, 154, .14);
      color: var(--teal2);
    }

    .mt .d {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--border);
    }

    .mt.on .d {
      background: var(--teal);
    }

    /* Buttons */
    .btn-row {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
      margin-top: 14px;
      align-items: center;
    }

    .btn {
      padding: 9px 20px;
      border: none;
      border-radius: 7px;
      cursor: pointer;
      font-size: 13px;
      font-weight: 600;
      transition: opacity .15s, transform .1s;
      white-space: nowrap;
    }

    .btn:active {
      transform: scale(.97);
    }

    .btn:disabled {
      opacity: .4;
      cursor: not-allowed;
    }

    .btn-p {
      background: var(--teal);
      color: #000;
    }

    .btn-s {
      background: var(--purple);
      color: #fff;
    }

    .btn-d {
      background: var(--blue);
      color: #fff;
    }

    .btn-sm {
      padding: 5px 12px;
      font-size: 11px;
    }

    /* Status & progress */
    #status {
      font-size: 12px;
      padding: 8px 12px;
      border-radius: 6px;
      margin-top: 10px;
      display: none;
    }

    #status.ok {
      background: #1a3a1a;
      color: var(--ok);
      display: block;
    }

    #status.err {
      background: #3a1a1a;
      color: var(--err);
      display: block;
    }

    #status.info {
      background: var(--s2);
      color: var(--teal2);
      display: block;
    }

    .prog {
      height: 3px;
      background: var(--border);
      border-radius: 2px;
      margin-top: 8px;
      overflow: hidden;
      display: none;
    }

    .prog.on {
      display: block;
    }

    .prog-bar {
      height: 100%;
      background: var(--teal);
      border-radius: 2px;
      transition: width .25s;
    }

    /* Song structure */
    .struct {
      display: grid;
      gap: 3px;
    }

    .srow {
      display: grid;
      grid-template-columns: 88px 34px 100px 1fr auto;
      gap: 8px;
      align-items: center;
      padding: 5px 9px;
      border-radius: 5px;
      background: var(--s2);
      font-size: 11px;
    }

    .badge {
      display: inline-block;
      padding: 1px 7px;
      border-radius: 10px;
      font-size: 9px;
      font-weight: 700;
      text-transform: uppercase;
    }

    .bi {
      background: #1a3a5c;
      color: #9CDCFE;
    }

    .bv {
      background: #1a3a2a;
      color: #4EC9B0;
    }

    .bc {
      background: #3a2e10;
      color: #DCDCAA;
    }

    .bbr {
      background: #2a1a3a;
      color: #C586C0;
    }

    .bo {
      background: #282828;
      color: #888;
    }

    .estrip {
      display: flex;
      gap: 2px;
    }

    .ep {
      width: 6px;
      height: 11px;
      border-radius: 2px;
      background: var(--s3);
    }

    .ep.on {
      background: var(--teal);
    }

    .ep.hi {
      background: var(--warn);
    }

    .mmini {
      display: flex;
      gap: 2px;
    }

    .mm {
      width: 15px;
      height: 15px;
      border-radius: 3px;
      font-size: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .mm.on {
      background: rgba(38, 166, 154, .3);
      color: var(--teal2);
    }

    .mm.off {
      background: var(--s3);
    }

    /* Stats */
    .stats {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
      margin-bottom: 14px;
    }

    .stat .v {
      font-size: 24px;
      font-weight: 700;
      color: var(--teal);
      display: block;
    }

    .stat .l {
      font-size: 9px;
      color: var(--muted);
      text-transform: uppercase;
    }

    /* Tab area */
    .tab-nav {
      display: flex;
      gap: 6px;
      margin-bottom: 12px;
    }

    .tab-btn {
      padding: 5px 14px;
      border: 1px solid var(--border);
      border-radius: 16px;
      background: var(--s2);
      color: var(--muted);
      font-size: 11px;
      cursor: pointer;
      transition: all .15s;
    }

    .tab-btn.active {
      border-color: var(--teal);
      background: rgba(38, 166, 154, .14);
      color: var(--teal2);
    }

    .tab-panel {
      display: none;
      overflow-x: auto;
      border-radius: 6px;
      background: var(--bg);
    }

    .tab-panel.active {
      display: block;
    }

    .tab-scroll {
      overflow-x: auto;
      max-height: 70vh;
      overflow-y: auto;
      border-radius: 6px;
    }

    /* Downloads */
    #dl-list {
      list-style: none;
    }

    #dl-list li {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 7px 0;
      border-bottom: 1px solid var(--border);
      font-size: 12px;
    }

    #dl-list li:last-child {
      border-bottom: none;
    }

    /* Spinner */
    @keyframes spin {
      to {
        transform: rotate(360deg);
      }
    }

    .sp {
      display: inline-block;
      width: 12px;
      height: 12px;
      border: 2px solid var(--teal);
      border-top-color: transparent;
      border-radius: 50%;
      animation: spin .6s linear infinite;
      vertical-align: middle;
      margin-right: 4px;
    }

    /* Responsive */
    @media(max-width:600px) {
      .srow {
        grid-template-columns: 72px 28px 80px 1fr;
      }

      .srow> :last-child {
        display: none;
      }
    }

    /* ── Mode navigation ────────────────────────────────────── */
    .mode-nav {
      display: flex;
      gap: 8px;
      margin-bottom: 18px;
      border-bottom: 1px solid var(--border);
      padding-bottom: 14px;
    }

    .mode-btn {
      padding: 7px 20px;
      border: 1px solid var(--border);
      border-radius: 20px;
      background: var(--s1);
      color: var(--muted);
      font-size: 12px;
      font-weight: 500;
      cursor: pointer;
      transition: all .15s;
      font-family: inherit;
    }

    .mode-btn:hover {
      border-color: var(--teal);
      color: var(--text);
    }

    .mode-btn.active {
      border-color: var(--teal);
      background: rgba(38, 166, 154, .15);
      color: var(--teal2);
      font-weight: 700;
    }

    /* ── Session Mode — scheletro ────────────────────────────── */
    .sm-toolbar {
      display: flex;
      gap: 6px;
      flex-wrap: wrap;
      margin-top: 12px;
    }

    .sm-add-btn {
      padding: 5px 13px;
      border: 1px solid var(--border);
      border-radius: 14px;
      background: var(--s2);
      color: var(--muted);
      font-size: 11px;
      cursor: pointer;
      transition: all .15s;
      font-family: inherit;
    }

    .sm-add-btn:hover {
      border-color: var(--teal);
      color: var(--teal2);
    }

    .sm-sec-row {
      display: grid;
      grid-template-columns: 55px 1fr 28px 70px 70px auto;
      gap: 8px;
      align-items: center;
      padding: 7px 10px;
      border-radius: 6px;
      background: var(--s2);
      border: 1px solid var(--border);
      margin-bottom: 4px;
      font-size: 11px;
      transition: border-color .15s;
    }

    .sm-sec-row:hover {
      border-color: var(--border);
    }

    .sm-sec-label {
      font-size: 12px;
      font-weight: 500;
      color: var(--text);
    }

    .sm-sec-bars {
      color: var(--muted);
      font-size: 10px;
    }

    .sm-sec-seed {
      color: var(--muted);
      font-size: 10px;
      font-family: monospace;
    }

    .sm-sec-actions {
      display: flex;
      gap: 4px;
      align-items: center;
    }

    .sm-icon-btn {
      padding: 3px 7px;
      border: 1px solid var(--border);
      border-radius: 5px;
      background: var(--s3);
      color: var(--muted);
      font-size: 11px;
      cursor: pointer;
      font-family: inherit;
      transition: all .12s;
    }

    .sm-icon-btn:hover:not(:disabled) {
      border-color: var(--teal);
      color: var(--teal2);
    }

    .sm-icon-btn:disabled {
      opacity: .3;
      cursor: not-allowed;
    }

    .sm-del-btn:hover:not(:disabled) {
      border-color: var(--err);
      color: var(--err);
    }

    .sm-empty {
      text-align: center;
      padding: 36px 16px;
      color: var(--muted);
      font-size: 12px;
    }

    .sm-coming {
      text-align: center;
      padding: 40px 20px;
    }

    @media(max-width:600px) {
      .sm-sec-row {
        grid-template-columns: 50px 1fr auto;
      }

      .sm-sec-row> :nth-child(3),
      .sm-sec-row> :nth-child(4),
      .sm-sec-row> :nth-child(5) {
        display: none;
      }
    }

    /* ── Session Mode — pannelli strumento ──────────────────────── */
    .sm-cfg-open {
      border-color: var(--teal) !important;
      color: var(--teal2) !important;
    }

    .sm-panel {
      background: var(--s1);
      border: 1px solid var(--teal);
      border-radius: 8px;
      padding: 14px 16px;
      margin-bottom: 8px;
    }

    .sm-panel-tabs {
      display: flex;
      gap: 6px;
      margin-bottom: 12px;
      border-bottom: 1px solid var(--border);
      padding-bottom: 10px;
      flex-wrap: wrap;
    }

    .sm-panel-tab {
      padding: 4px 12px;
      border: 1px solid var(--border);
      border-radius: 12px;
      background: var(--s2);
      color: var(--muted);
      font-size: 11px;
      cursor: pointer;
      font-family: inherit;
      transition: all .12s;
    }

    .sm-panel-tab:hover {
      border-color: var(--teal);
      color: var(--text);
    }

    .sm-panel-tab.active {
      border-color: var(--teal);
      background: rgba(38, 166, 154, .14);
      color: var(--teal2);
    }

    .sm-char-selector {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 10px 12px;
      background: var(--s2);
      border-radius: 8px;
      margin-bottom: 14px;
      border: 1px solid var(--border);
    }

    .sm-char-img {
      width: 52px;
      height: 52px;
      border-radius: 7px;
      object-fit: cover;
      background: var(--s3);
      flex-shrink: 0;
    }

    .sm-char-info {
      flex: 1;
      min-width: 0;
    }

    .sm-char-name {
      font-size: 13px;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 3px;
    }

    .sm-char-bio {
      font-size: 10px;
      color: var(--muted);
      line-height: 1.5;
    }

    .sm-char-nav-btn {
      padding: 5px 9px;
      border: 1px solid var(--border);
      border-radius: 5px;
      background: var(--s3);
      color: var(--muted);
      cursor: pointer;
      font-size: 14px;
      font-family: inherit;
      flex-shrink: 0;
      transition: all .12s;
    }

    .sm-char-nav-btn:hover {
      border-color: var(--teal);
      color: var(--teal2);
    }

    .sm-ctrl-row {
      display: flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 10px;
    }

    .sm-ctrl-label {
      font-size: 9px;
      color: var(--muted);
      text-transform: uppercase;
      letter-spacing: .5px;
      white-space: nowrap;
    }

    .sm-panel-controls {
      display: flex;
      gap: 18px;
      flex-wrap: wrap;
      align-items: flex-end;
      padding: 8px 0;
    }

    .sm-pattern-rows {
      display: flex;
      flex-direction: column;
      gap: 6px;
      margin-bottom: 12px;
      padding: 8px;
      background: var(--s2);
      border-radius: 6px;
    }

    .sm-pattern-row {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .sm-pattern-lbl {
      font-size: 9px;
      color: var(--muted);
      text-transform: uppercase;
      letter-spacing: .5px;
      width: 32px;
      flex-shrink: 0;
    }

    .sm-style-sel {
      background: var(--s2);
      border: 1px solid var(--border);
      border-radius: 6px;
      color: var(--text);
      padding: 5px 8px;
      font-size: 12px;
      font-family: inherit;
      cursor: pointer;
    }

    .sm-style-sel:focus {
      outline: 2px solid var(--teal);
      border-color: transparent;
    }

    .sm-panel-placeholder {
      text-align: center;
      padding: 20px;
      color: var(--muted);
      font-size: 11px;
    }

    /* ── Drum Machine step grid ─── */
    .sm-dm-grid {
      display: flex;
      flex-direction: column;
      gap: 5px;
      margin-bottom: 12px;
      padding: 8px;
      background: var(--s2);
      border-radius: 6px;
    }

    .sm-dm-row {
      display: flex;
      align-items: center;
      gap: 3px;
    }

    .sm-dm-label {
      font-size: 9px;
      color: var(--muted);
      text-transform: uppercase;
      letter-spacing: .5px;
      width: 36px;
      flex-shrink: 0;
    }

    .sm-dm-step {
      width: 16px;
      height: 16px;
      padding: 0;
      border: 1px solid var(--border);
      border-radius: 3px;
      background: var(--s3);
      cursor: pointer;
      transition: background .1s, border-color .1s;
    }

    .sm-dm-step.active {
      background: var(--teal);
      border-color: var(--teal2);
    }

    .sm-dm-step:hover {
      border-color: var(--teal2);
    }

    .sm-dm-beat4 {
      margin-left: 5px;
    }

    /* ── Composer Header barra globale ─────────────────────────── */
    .composer-bar {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-wrap: wrap;
      padding: 10px 14px;
      background: var(--s1);
      border: 1px solid var(--border);
      border-radius: 10px;
      margin-bottom: 16px;
    }

    .composer-bar label {
      font-size: 9px;
      color: var(--muted);
      text-transform: uppercase;
      letter-spacing: .5px;
      margin-bottom: 0;
      white-space: nowrap;
    }

    .composer-bar select,
    .composer-bar input[type=range] {
      width: auto;
    }

    .composer-bar select {
      min-width: 110px;
      padding: 5px 7px;
      font-size: 12px;
    }

    .composer-bar .cb-bpm {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .composer-bar .cb-bpm input[type=range] {
      width: 90px;
    }

    .composer-bar .cb-sep {
      width: 1px;
      height: 24px;
      background: var(--border);
      flex-shrink: 0;
    }

    .composer-bar .cb-spacer {
      flex: 1;
    }

    /* ── Arrangement lanes ──────────────────────────────────────── */
    .lanes-wrap {
      overflow-x: auto;
      border-radius: 8px;
    }

    .lanes-grid {
      display: grid;
      grid-template-rows: repeat(5, 36px);
      gap: 3px;
      min-width: 0;
    }

    .lane-row {
      display: flex;
      align-items: center;
      gap: 3px;
      height: 36px;
    }

    .lane-label {
      width: 62px;
      flex-shrink: 0;
      display: flex;
      align-items: center;
      gap: 5px;
      font-size: 9px;
      color: var(--muted);
      text-transform: uppercase;
      letter-spacing: .4px;
    }

    .lane-label-icon {
      font-size: 14px;
    }

    .inst-icon {
      width: 20px;
      height: 20px;
      object-fit: contain;
      vertical-align: middle;
    }

    .lane-block {
      height: 32px;
      border-radius: 5px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 9px;
      font-weight: 700;
      letter-spacing: .4px;
      text-transform: uppercase;
      overflow: hidden;
      white-space: nowrap;
      transition: filter .12s, opacity .12s;
      flex-shrink: 0;
      padding: 0 4px;
    }

    .lane-block:hover {
      filter: brightness(1.2);
    }

    .lane-block.inactive {
      background: var(--s3) !important;
      color: var(--muted);
      opacity: .55;
    }

    /* Colori per strumento (S20) — bordo sinistro colorato per strumento */
    .lane-block[data-inst="drums"] {
      background: rgba(255, 213, 79, .18);
      color: var(--clr-drums);
      border-left: 3px solid var(--clr-drums);
    }

    .lane-block[data-inst="bass"] {
      background: rgba(33, 150, 243, .18);
      color: var(--clr-bass);
      border-left: 3px solid var(--clr-bass);
    }

    .lane-block[data-inst="guitar"] {
      background: rgba(244, 67, 54, .18);
      color: var(--clr-guitar);
      border-left: 3px solid var(--clr-guitar);
    }

    .lane-block[data-inst="piano"] {
      background: rgba(76, 175, 80, .18);
      color: var(--clr-piano);
      border-left: 3px solid var(--clr-piano);
    }

    .lane-block[data-inst="ensemble"] {
      background: rgba(255, 152, 0, .18);
      color: var(--clr-ens);
      border-left: 3px solid var(--clr-ens);
    }

    .lane-block.inactive {
      background: var(--s3) !important;
      color: var(--muted) !important;
      opacity: .55;
      border-left: 3px solid var(--border) !important;
      border-top: none !important;
    }

    .lane-block:hover:not(.inactive) {
      filter: brightness(1.3);
    }

    /* Bordo superiore: colore per tipo sezione (combo UI S20) */
    .lane-block[data-sectype="intro"] {
      border-top: 3px solid #7ecdc0;
    }

    .lane-block[data-sectype="verse"] {
      border-top: 3px solid #4a9;
    }

    .lane-block[data-sectype="chorus"] {
      border-top: 3px solid #f80;
    }

    .lane-block[data-sectype="bridge"] {
      border-top: 3px solid #b08de0;
    }

    .lane-block[data-sectype="outro"] {
      border-top: 3px solid #888;
    }

    .lane-block[data-sectype="custom"] {
      border-top: 3px solid #6ab;
    }

    /* Sezione header label sopra le lanes */
    .lanes-header {
      display: flex;
      gap: 3px;
      margin-bottom: 3px;
    }

    .lanes-header-spacer {
      width: 62px;
      flex-shrink: 0;
    }

    .lanes-sec-label {
      font-size: 8px;
      color: var(--muted);
      text-align: center;
      overflow: hidden;
      white-space: nowrap;
      text-overflow: ellipsis;
      padding: 0 2px;
      flex-shrink: 0;
      border: 1px solid transparent;
      border-radius: 3px;
      transition: border-color .15s, color .15s;
    }
    .lanes-sec-label:hover {
      color: var(--teal2);
    }

    /* Toolbar sezioni sopra le lanes */
    .lanes-toolbar {
      display: flex;
      gap: 6px;
      align-items: center;
      flex-wrap: wrap;
      margin-bottom: 8px;
    }

    .lanes-add-btn {
      padding: 4px 11px;
      border: 1px solid var(--border);
      border-radius: 12px;
      background: var(--s2);
      color: var(--muted);
      font-size: 10px;
      cursor: pointer;
      transition: all .15s;
      font-family: inherit;
    }

    .lanes-add-btn:hover {
      border-color: var(--teal);
      color: var(--teal2);
    }

    /* Flyout pannello strumento — background colorato per strumento (S20) */
    .lane-flyout {
      border: 1px solid var(--teal);
      border-radius: 8px;
      padding: 12px 14px;
      margin-top: 6px;
    }

    .lane-flyout[data-inst="drums"] {
      background: rgba(255, 213, 79, .08);
      border-color: var(--clr-drums);
    }

    .lane-flyout[data-inst="bass"] {
      background: rgba(33, 150, 243, .08);
      border-color: var(--clr-bass);
    }

    .lane-flyout[data-inst="guitar"] {
      background: rgba(244, 67, 54, .08);
      border-color: var(--clr-guitar);
    }

    .lane-flyout[data-inst="piano"] {
      background: rgba(76, 175, 80, .08);
      border-color: var(--clr-piano);
    }

    .lane-flyout[data-inst="ensemble"] {
      background: rgba(255, 152, 0, .08);
      border-color: var(--clr-ens);
    }

    .lane-flyout-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 8px;
    }

    .lane-flyout-title {
      font-size: 11px;
      font-weight: 700;
      color: var(--teal2);
    }

    .lane-flyout-close {
      background: none;
      border: none;
      color: var(--muted);
      cursor: pointer;
      font-size: 14px;
      padding: 0 4px;
    }

    /* ── Pannelli collassabili ──────────────────────────────────── */
    .collapsible-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
    }

    .collapsible-header:hover .card-title {
      color: var(--teal2);
    }

    /* ── Chord Track ────────────────────────────────────────────── */
    .chord-track-row {
      display: flex;
      align-items: flex-start;
      gap: 3px;
      margin-bottom: 6px;
      position: relative;
      z-index: 10;
    }

    .chord-track-spacer {
      width: 62px;
      flex-shrink: 0;
    }

    .chord-track-blocks {
      display: flex;
      gap: 3px;
      flex-wrap: nowrap;
      overflow: visible;
    }

    .chord-sec-block {
      display: flex;
      gap: 3px;
      flex-shrink: 0;
      position: relative;
    }

    .chord-chip {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      height: 22px;
      min-width: 28px;
      padding: 0 5px;
      background: var(--s3);
      border: 1px solid var(--border);
      border-radius: 5px;
      font-size: 9px;
      font-weight: 700;
      color: var(--teal2);
      cursor: pointer;
      white-space: nowrap;
      transition: all .12s;
      font-family: inherit;
      flex-shrink: 0;
    }

    .chord-chip:hover {
      border-color: var(--teal);
      color: var(--teal);
    }

    .chord-chip.editing {
      border-color: var(--gold);
      background: rgba(255, 213, 79, .12);
      color: var(--gold);
    }

    .chord-chip.custom {
      border-color: var(--purple);
      color: #92C5FF;
    }

    .chord-chip-add {
      background: none;
      border: 1px dashed var(--border);
      color: var(--muted);
    }

    .chord-chip-add:hover {
      border-color: var(--teal);
      color: var(--teal);
    }

    .chord-chip-empty {
      background: none;
      border: 1px dashed var(--muted);
      color: var(--muted);
      font-size: 8px;
      opacity: .6;
    }

    .chord-chip-empty:hover {
      opacity: 1;
      border-color: var(--teal);
      color: var(--teal);
    }

    /* Micro-editor chip */
    .chip-editor {
      position: absolute;
      top: 26px;
      left: 0;
      z-index: 100;
      background: var(--s1);
      border: 1px solid var(--gold);
      border-radius: 8px;
      padding: 8px 10px;
      display: flex;
      flex-direction: column;
      gap: 6px;
      min-width: 160px;
      box-shadow: 0 4px 16px rgba(0, 0, 0, .5);
    }

    /* S21: chip editor con slash chord support */
    .chip-editor {
      position: absolute;
      top: 26px;
      left: 0;
      z-index: 100;
      background: var(--s1);
      border: 1px solid var(--gold);
      border-radius: 8px;
      padding: 8px 10px;
      display: flex;
      flex-direction: column;
      gap: 5px;
      min-width: 180px;
      box-shadow: 0 4px 16px rgba(0, 0, 0, .5);
    }

    .chip-editor-row {
      display: flex;
      align-items: center;
      gap: 5px;
    }

    .chip-editor label {
      font-size: 9px;
      color: var(--muted);
      text-transform: uppercase;
      letter-spacing: .4px;
      width: 46px;
      flex-shrink: 0;
    }

    .chip-editor-row.slash-row {
      margin-top: 2px;
      padding-top: 5px;
      border-top: 1px dashed var(--border);
    }

    .chip-editor-slash {
      font-size: 9px;
      color: var(--muted);
      font-weight: 700;
      margin-right: 4px;
    }

    .chip-editor select {
      background: var(--s2);
      border: 1px solid var(--border);
      color: var(--text);
      border-radius: 4px;
      padding: 3px 5px;
      font-size: 11px;
      flex: 1;
      font-family: inherit;
    }

    .chip-editor-actions {
      display: flex;
      gap: 5px;
      margin-top: 2px;
    }

    .chip-editor-actions button {
      flex: 1;
      padding: 4px;
      border: 1px solid var(--border);
      border-radius: 5px;
      background: var(--s2);
      color: var(--muted);
      font-size: 10px;
      cursor: pointer;
      font-family: inherit;
      transition: all .12s;
    }

    .chip-editor-actions .apply {
      border-color: var(--teal);
      color: var(--teal);
    }

    .chip-editor-actions .apply:hover {
      background: rgba(38, 166, 154, .2);
    }

    .chip-editor-actions .del {
      border-color: var(--err);
      color: var(--err);
    }

    .chip-editor-actions .del:hover {
      background: rgba(239, 83, 80, .15);
    }

    .chip-editor-actions .reset {
      border-color: var(--muted);
    }

    .chip-editor-actions .reset:hover {
      border-color: var(--teal2);
      color: var(--text);
    }

    /* ── Session Mode — Mixer Preview (verticale) ───────────────── */
    .sm-mixer {
      display: flex;
      gap: 8px;
      align-items: stretch;
      height: 120px;
    }

    .sm-mixer-col {
      position: relative;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      gap: 8px;
      align-items: stretch;
      justify-content: stretch;
      background: var(--s2);
      border: 1px solid var(--border);
      border-radius: 8px;
      padding: 8px 8px 6px 8px;
      flex: 1;
    }

    .sm-mixer-bg {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.18;
      pointer-events: none;
      z-index: 0;
      padding: 0;
      margin: 0;
    }

    .sm-mixer-body {
      display: grid;
      grid-template-columns: 18px 1fr;
      gap: 6px;
      align-items: stretch;
      z-index: 1;
      position: relative;
      flex: 1;
      min-height: 0;
    }

    .sm-mixer-ctrls {
      display: flex;
      flex-direction: column;
      gap: 4px;
      flex: 1;
      justify-content: space-between;
      min-width: 0;
      width: 100%;
      height: 100%;
      padding-top: 2px;
      padding-bottom: 2px;
    }

    .sm-mixer-btns {
      display: flex;
      gap: 4px;
    }

    .sm-mixer-icon {
      font-size: 16px;
    }

    .sm-mixer-lbl {
      font-size: 8px;
      color: var(--muted);
      text-transform: uppercase;
      letter-spacing: .4px;
    }

    .sm-mixer-vol {
      writing-mode: vertical-lr;
      direction: rtl;
      -webkit-appearance: slider-vertical;
      appearance: slider-vertical;
      width: 18px;
      height: 100%;
      accent-color: var(--teal);
      cursor: pointer;
      margin: 0;
      flex-shrink: 0;
    }

    .sm-mixer-mute,
    .sm-mixer-solo {
      flex: 1;
      height: 20px;
      border: 1px solid var(--border);
      border-radius: 4px;
      background: var(--s3);
      color: var(--muted);
      font-size: 9px;
      font-weight: 700;
      cursor: pointer;
      font-family: inherit;
      transition: all .12s;
      padding: 0;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .sm-mixer-mute:hover {
      border-color: var(--warn);
      color: var(--warn);
    }

    .sm-mixer-mute.muted {
      border-color: var(--err);
      background: rgba(239, 83, 80, .2);
      color: var(--err);
    }

    .sm-mixer-solo:hover {
      border-color: var(--gold);
      color: var(--gold);
    }

    .sm-mixer-solo.soloed {
      border-color: var(--gold);
      background: rgba(255, 213, 79, .2);
      color: var(--gold);
    }

    .sm-mixer-out {
      flex: none;
      width: 100%;
      height: 18px;
      padding: 1px;
      font-size: 8px;
      background: var(--s3);
      border: 1px solid var(--border);
      color: var(--text);
      border-radius: 4px;
      font-family: inherit;
      cursor: pointer;
      text-overflow: ellipsis;
      overflow: hidden;
      white-space: nowrap;
    }

    /* Mixer colori strumento (S20) */
    .sm-mixer-col[data-mix-inst="drums"] {
      border-bottom: 2px solid var(--clr-drums);
    }

    .sm-mixer-col[data-mix-inst="bass"] {
      border-bottom: 2px solid var(--clr-bass);
    }

    .sm-mixer-col[data-mix-inst="guitar"] {
      border-bottom: 2px solid var(--clr-guitar);
    }

    .sm-mixer-col[data-mix-inst="piano"] {
      border-bottom: 2px solid var(--clr-piano);
    }

    .sm-mixer-col[data-mix-inst="ensemble"] {
      border-bottom: 2px solid var(--clr-ens);
    }

    .sm-mixer-col[data-mix-inst="drums"] input[type=range] {
      accent-color: var(--clr-drums);
    }

    .sm-mixer-col[data-mix-inst="bass"] input[type=range] {
      accent-color: var(--clr-bass);
    }

    .sm-mixer-col[data-mix-inst="guitar"] input[type=range] {
      accent-color: var(--clr-guitar);
    }

    .sm-mixer-col[data-mix-inst="piano"] input[type=range] {
      accent-color: var(--clr-piano);
    }

    .sm-mixer-col[data-mix-inst="ensemble"] input[type=range] {
      accent-color: var(--clr-ens);
    }

/* ── Support toast (Ko-fi) ──────────────────────────────────────────
   Notifica leggera non bloccante mostrata ogni 10 generazioni o
   5 download (MIDI/CRD/Markdown), per invitare a sostenere il progetto.
   Sessione: pacchetto GitHub. */
.sm-toast-wrap {
  position: fixed;
  bottom: 18px;
  right: 18px;
  z-index: 9998;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.sm-toast {
  pointer-events: auto;
  background: var(--s1);
  border: 1px solid var(--border);
  border-left: 3px solid var(--teal);
  border-radius: 8px;
  padding: 12px 14px;
  max-width: 300px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, .35);
  font-size: 12px;
  color: var(--text);
  display: flex;
  align-items: flex-start;
  gap: 10px;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .25s ease, transform .25s ease;
}

.sm-toast.sm-toast-in {
  opacity: 1;
  transform: translateY(0);
}

.sm-toast-icon {
  font-size: 18px;
  line-height: 1;
  flex-shrink: 0;
}

.sm-toast-body p {
  margin: 0 0 6px;
  line-height: 1.45;
}

.sm-toast-body a {
  color: var(--teal2);
  font-weight: 600;
  text-decoration: none;
}

.sm-toast-body a:hover {
  text-decoration: underline;
}

.sm-toast-close {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 14px;
  line-height: 1;
  cursor: pointer;
  padding: 0;
  margin-left: auto;
  flex-shrink: 0;
}

.sm-toast-close:hover {
  color: var(--text);
}