:root {
  --bg: #0b0b0f;
  --panel: #14141b;
  --panel-2: #1c1c26;
  --border: #262632;
  --text: #e8e8ef;
  --muted: #8a8a9a;
  --accent: #ff5c3a;
  --accent-2: #ffb03a;
  --green: #38d17a;
  --blue: #4aa3ff;
  --purple: #a074ff;
}
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin:0; padding:0; height:100%; background:var(--bg); color:var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", Inter, system-ui, sans-serif;
  overscroll-behavior: none; user-select:none; -webkit-user-select:none;
}
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
input, select { font: inherit; color: inherit; }

#app { display:flex; flex-direction:column; height:100dvh; padding-top: env(safe-area-inset-top); padding-bottom: env(safe-area-inset-bottom); }

/* Header */
.topbar { display:flex; align-items:center; gap:10px; padding:10px 14px; border-bottom:1px solid var(--border); background:var(--panel); }
.topbar .brand { font-weight:700; letter-spacing:.5px; color:var(--accent); }
.topbar .title { font-weight:600; flex:1; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.topbar .title input { width:100%; background:transparent; border:0; color:var(--text); font-weight:600; outline:none; }
.topbar .btn { padding:8px 12px; background:var(--panel-2); border:1px solid var(--border); border-radius:8px; font-size:13px; }
.topbar .btn.primary { background:var(--accent); color:#fff; border-color:transparent; }
.topbar .btn.ghost { background:transparent; }

.icon-btn { width:38px; height:38px; display:inline-flex; align-items:center; justify-content:center; background:var(--panel-2); border:1px solid var(--border); border-radius:10px; }
.icon-btn.active { background:var(--accent); border-color:var(--accent); color:#fff; }

/* Dashboard */
.dashboard { padding:20px; overflow:auto; }
.dashboard h1 { margin:0 0 6px; font-size:22px; }
.dashboard p.sub { margin:0 0 20px; color:var(--muted); font-size:14px; }
.new-project { display:flex; gap:8px; margin-bottom:20px; }
.new-project input { flex:1; padding:12px 14px; background:var(--panel); border:1px solid var(--border); border-radius:10px; }
.projects { display:grid; grid-template-columns:repeat(auto-fill,minmax(220px,1fr)); gap:12px; }
.pcard { background:var(--panel); border:1px solid var(--border); border-radius:14px; padding:14px; display:flex; flex-direction:column; gap:8px; }
.pcard .pname { font-weight:600; font-size:15px; }
.pcard .pmeta { color:var(--muted); font-size:12px; }
.pcard .row { display:flex; gap:6px; margin-top:6px; flex-wrap:wrap; }
.pcard .row button { padding:6px 10px; background:var(--panel-2); border:1px solid var(--border); border-radius:8px; font-size:12px; }
.pcard .row button.open { background:var(--accent); color:#fff; border-color:transparent; }
.pcard .row button.danger { color:#ff6b6b; }

/* Studio */
.studio { display:flex; flex-direction:column; flex:1; overflow:hidden; }
.transport { display:flex; align-items:center; gap:10px; padding:10px 14px; border-bottom:1px solid var(--border); background:var(--panel); flex-wrap:wrap; }
.transport .group { display:flex; align-items:center; gap:6px; }
.transport label { color:var(--muted); font-size:12px; }
.transport input[type=number] { width:70px; padding:6px 8px; background:var(--panel-2); border:1px solid var(--border); border-radius:8px; }
.transport .led { width:8px; height:8px; border-radius:50%; background:#333; }
.transport .led.on { background:var(--green); box-shadow:0 0 6px var(--green); }

/* Tabs */
.tabs { display:flex; gap:4px; padding:8px 10px; background:var(--panel); border-bottom:1px solid var(--border); overflow-x:auto; }
.tab { padding:8px 14px; background:var(--panel-2); border:1px solid var(--border); border-radius:8px; font-size:13px; white-space:nowrap; }
.tab.active { background:var(--accent); color:#fff; border-color:transparent; }

/* Sequencer */
.workspace { flex:1; overflow:auto; padding:14px; }
.seq-track { display:flex; align-items:center; gap:8px; margin-bottom:8px; }
.seq-label { width:110px; flex-shrink:0; padding:8px 10px; background:var(--panel); border:1px solid var(--border); border-radius:8px; font-size:13px; display:flex; flex-direction:column; gap:2px; }
.seq-label .name { font-weight:600; }
.seq-label .sub { color:var(--muted); font-size:11px; }
.seq-cells { display:grid; grid-template-columns:repeat(16, minmax(28px, 1fr)); gap:4px; flex:1; }
.cell { aspect-ratio:1; background:var(--panel-2); border:1px solid var(--border); border-radius:6px; transition: transform .08s; }
.cell.beat { background:#20202c; }
.cell.on { background:var(--accent); border-color:var(--accent); }
.cell.on.drums { background:var(--accent-2); border-color:var(--accent-2); }
.cell.on.bass { background:var(--blue); border-color:var(--blue); }
.cell.on.synth { background:var(--purple); border-color:var(--purple); }
.cell.on.piano { background:var(--green); border-color:var(--green); }
.cell.playhead { outline:2px solid #fff8; outline-offset:-2px; }
.cell:active { transform:scale(.92); }

.track-row-header { display:flex; gap:8px; margin-bottom:10px; align-items:center; }
.track-row-header .steps-hint { color:var(--muted); font-size:12px; margin-left:auto; }

.pitch-picker { display:flex; gap:4px; margin-bottom:10px; flex-wrap:wrap; }
.pitch-picker button { padding:6px 10px; background:var(--panel-2); border:1px solid var(--border); border-radius:6px; font-size:12px; }
.pitch-picker button.active { background:var(--accent); color:#fff; border-color:transparent; }

/* Piano keyboard */
.keyboard-wrap { padding:14px; overflow-x:auto; }
.keyboard { position:relative; display:flex; height:180px; user-select:none; min-width:600px; }
.wkey { flex:1; background:linear-gradient(#fafafa,#dcdce4); border:1px solid #333; border-radius:0 0 6px 6px; margin-right:1px; position:relative; color:#333; font-size:10px; display:flex; align-items:flex-end; justify-content:center; padding-bottom:6px; }
.wkey.active { background:linear-gradient(#ffcbb8,#ff5c3a); color:#fff; }
.bkey { position:absolute; top:0; width:6%; height:60%; background:linear-gradient(#333,#000); border:1px solid #000; border-radius:0 0 4px 4px; color:#eee; font-size:9px; display:flex; align-items:flex-end; justify-content:center; padding-bottom:4px; z-index:2; }
.bkey.active { background:linear-gradient(#ff8b6d,#ff5c3a); }

.record-log { padding:10px 14px; color:var(--muted); font-size:12px; border-top:1px solid var(--border); background:var(--panel); }

/* Modal */
.modal-back { position:fixed; inset:0; background:rgba(0,0,0,.6); display:flex; align-items:center; justify-content:center; z-index:50; padding:20px; }
.modal { background:var(--panel); border:1px solid var(--border); border-radius:14px; padding:20px; width:100%; max-width:420px; }
.modal h3 { margin:0 0 10px; }
.modal p { color:var(--muted); font-size:13px; margin:0 0 14px; }
.progress { height:8px; background:var(--panel-2); border-radius:4px; overflow:hidden; }
.progress > div { height:100%; background:var(--accent); width:0%; transition:width .1s linear; }
.modal .row { display:flex; gap:8px; margin-top:14px; justify-content:flex-end; }
.modal .row button { padding:8px 14px; background:var(--panel-2); border:1px solid var(--border); border-radius:8px; }
.modal .row button.primary { background:var(--accent); color:#fff; border-color:transparent; }

.toast { position:fixed; left:50%; bottom:20px; transform:translateX(-50%); background:var(--panel); border:1px solid var(--border); padding:10px 16px; border-radius:10px; z-index:60; font-size:13px; }

/* Mobile tweaks */
@media (max-width: 600px) {
  .seq-label { width:78px; font-size:11px; }
  .seq-cells { grid-template-columns:repeat(16, minmax(18px,1fr)); gap:2px; }
  .topbar .btn { padding:6px 8px; font-size:12px; }
  .transport { gap:6px; }
}

/* Track mix controls */
.seq-label { min-height: 78px; }
.seq-label.dimmed { opacity: .45; }
.cell.dimmed { opacity: .5; }
.seq-label .mix-row { display:flex; gap:4px; margin-top:4px; }
.mix-btn { flex:1; padding:3px 0; font-size:11px; font-weight:700; background:var(--panel-2); border:1px solid var(--border); border-radius:5px; color:var(--muted); }
.mix-btn.m.active { background:#ff5c3a; border-color:#ff5c3a; color:#fff; }
.mix-btn.s.active { background:#ffb03a; border-color:#ffb03a; color:#111; }
.seq-label input.vol { width:100%; margin-top:6px; accent-color: var(--accent); }

/* Export settings modal */
.modal .field { display:flex; align-items:center; justify-content:space-between; gap:12px; margin:10px 0; }
.modal .field > label { color:var(--muted); font-size:13px; }
.modal .ctrl { padding:6px 10px; background:var(--panel-2); border:1px solid var(--border); border-radius:8px; color:var(--text); }
.modal select.ctrl { min-width: 130px; }
.modal input[type=checkbox] { width:18px; height:18px; accent-color: var(--accent); }