:root {
  --bg0: #12140f;
  --bg1: #1a1d16;
  --bg2: #23281c;
  --line: #3a422e;
  --text: #e8e2d2;
  --muted: #9a927e;
  --amber: #e2a126;
  --amber-dim: #8a6418;
  --green: #8fbf4a;
  --red: #d65a3a;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  --radius: 10px;
  --sidebar-w: 280px;
  --font-display: "Space Grotesk", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(226, 161, 38, 0.12), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(143, 191, 74, 0.08), transparent 50%),
    linear-gradient(180deg, #161910 0%, var(--bg0) 40%, #0e100c 100%);
  color: var(--text);
  font-family: var(--font-mono);
}

.noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  z-index: 0;
}

.shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  min-height: 100vh;
  align-items: start;
}

.workspace {
  min-width: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ——— Left sidebar: control / MIDI ——— */

.sidebar-left {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  overscroll-behavior: contain;
  border-right: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(26, 29, 22, 0.97), rgba(14, 16, 12, 0.98));
  padding: 18px 14px 28px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}

/* ——— Top bar: generation ——— */

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(226, 161, 38, 0.08), transparent 55%),
    rgba(18, 20, 15, 0.96);
  backdrop-filter: blur(10px);
  padding: 12px 20px 14px;
}

.topbar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.topbar-title {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}

.topbar-kicker {
  font-family: var(--font-display);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--amber);
}

.topbar-head .hint { margin: 0; }

.topbar-body {
  display: grid;
  grid-template-columns: minmax(180px, 0.9fr) minmax(200px, 1fr) minmax(240px, 1.2fr) auto;
  gap: 14px 18px;
  align-items: start;
}

.top-group {
  min-width: 0;
  padding: 10px 12px;
  border: 1px solid rgba(58, 66, 46, 0.75);
  border-radius: 10px;
  background: rgba(26, 29, 22, 0.55);
}

.top-group.grow { min-width: 0; }

.top-group h2 {
  font-family: var(--font-display);
  font-size: 0.72rem;
  margin: 0 0 8px;
  letter-spacing: 0.08em;
  color: var(--muted);
  text-transform: uppercase;
}

.top-fields {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.top-fields label { margin-bottom: 0; }

.presets-fields {
  grid-template-columns: 1fr 1.2fr;
  margin-bottom: 8px;
}

.legend-group .legend-inline {
  margin-top: 2px;
}

.legend-inline.vertical {
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}

.side-brand {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.brand-mark {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border-radius: 8px;
  background: linear-gradient(145deg, var(--amber), #a85f10);
  box-shadow: 0 0 0 1px rgba(255,255,255,0.08), 0 0 24px rgba(226,161,38,0.35);
  animation: pulse-mark 2.4s ease-in-out infinite;
}

@keyframes pulse-mark {
  0%, 100% { filter: brightness(1); }
  50% { filter: brightness(1.15); }
}

h1 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: 0.04em;
  font-size: 1.35rem;
  margin: 0;
  line-height: 1;
}

.ver {
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  color: var(--amber);
  vertical-align: middle;
  margin-left: 4px;
  border: 1px solid var(--amber-dim);
  border-radius: 999px;
  padding: 2px 7px;
  font-family: var(--font-mono);
  font-weight: 600;
}

.tag {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 0.65rem;
}

.side-block {
  padding: 12px 0;
  border-bottom: 1px solid rgba(58, 66, 46, 0.7);
}

.side-block h2 {
  font-family: var(--font-display);
  font-size: 0.82rem;
  margin: 0 0 10px;
  letter-spacing: 0.06em;
  color: var(--muted);
  text-transform: uppercase;
}

.transport-block {
  background: linear-gradient(180deg, rgba(226, 161, 38, 0.07), transparent 70%);
  margin: 0 -14px;
  padding: 14px 14px 16px;
  border-bottom: 1px solid var(--line);
}

.transport-stack {
  display: grid;
  gap: 8px;
  margin-bottom: 12px;
}

.transport-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.transport-stack .btn {
  width: 100%;
}

.meter {
  text-align: left;
  margin-bottom: 10px;
}

.meter-label {
  color: var(--muted);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
}

.meter-value {
  font-family: var(--font-display);
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--amber);
  line-height: 1.1;
  margin: 2px 0 8px;
}

.step-grid {
  display: grid;
  grid-template-columns: repeat(16, 1fr);
  gap: 2px;
}

.step-grid span {
  height: 7px;
  border-radius: 2px;
  background: var(--bg2);
  border: 1px solid var(--line);
}

.step-grid span.on {
  background: var(--amber);
  border-color: #f0c46a;
  box-shadow: 0 0 10px rgba(226,161,38,0.55);
  animation: tick-flash 120ms ease;
}

@keyframes tick-flash {
  from { filter: brightness(1.6); }
  to { filter: brightness(1); }
}

.status-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}

.pulse-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--bg2);
  border: 1px solid var(--line);
  transition: background 80ms ease, box-shadow 80ms ease;
}

.pulse-dot.tick {
  background: var(--green);
  border-color: var(--green);
  box-shadow: 0 0 10px var(--green);
}

.seed-box {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.seed {
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--green);
  word-break: break-all;
}

.side-chain {
  margin-top: auto;
  padding-top: 14px;
}

.chain-title {
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  color: var(--muted);
  margin-bottom: 8px;
}

.chain-mini {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  font-size: 0.68rem;
}

.node {
  border: 1px solid var(--line);
  background: var(--bg2);
  padding: 4px 8px;
  border-radius: 999px;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.node.hot {
  border-color: var(--amber);
  color: var(--amber);
}

.arrow { color: var(--muted); }

.hint {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.68rem;
  line-height: 1.4;
}

.hint.hotkeys {
  letter-spacing: 0.02em;
}

.error {
  color: var(--red);
  font-size: 0.7rem;
  margin: 6px 0 0;
  min-height: 1em;
}

/* ——— Controls ——— */

.btn {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--bg2);
  color: var(--text);
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  padding: 11px 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: transform 120ms ease, background 120ms ease, border-color 120ms ease;
}

.btn:hover:not(:disabled) { border-color: var(--amber-dim); transform: translateY(-1px); }
.btn:active:not(:disabled) { transform: translateY(0); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn.primary {
  background: linear-gradient(180deg, #d9a030, #a86f12);
  border-color: #f0c46a;
  color: #1a1204;
}
.btn.danger {
  background: #3a1d16;
  border-color: #8a3a28;
  color: #f0b5a4;
}
.btn.ghost { background: transparent; }
.btn.small { padding: 7px 9px; font-size: 0.65rem; }
.btn.active {
  background: #2a351c;
  border-color: var(--green);
  color: var(--green);
}
.btn.solo-on {
  background: #2a2818;
  border-color: var(--amber);
  color: var(--amber);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: flex-end;
  margin-bottom: 8px;
}
.btn-row.left { justify-content: flex-start; }

label {
  display: grid;
  gap: 5px;
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
}

select, input[type="range"], input[type="text"] {
  width: 100%;
}

select, input[type="text"] {
  appearance: none;
  background: var(--bg0);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px 10px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

input[type="text"]:focus, select:focus {
  outline: 1px solid var(--amber-dim);
  border-color: var(--amber-dim);
}

.bpm-row { margin-bottom: 10px; }
#bpm-val, #swing-val { color: var(--amber); }

input[type="range"] {
  accent-color: var(--amber);
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 10px;
  letter-spacing: 0.08em;
  font-size: 0.68rem;
  color: var(--muted);
}

.pill::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--muted);
}

.pill.live {
  border-color: #4a6a28;
  color: var(--green);
}
.pill.live::before {
  background: var(--green);
  box-shadow: 0 0 10px var(--green);
  animation: pulse-mark 1s ease-in-out infinite;
}

/* ——— Main ——— */

.main {
  min-width: 0;
  flex: 1;
  padding: 18px 24px 48px;
}

.main-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.main-title h2 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin: 0;
  letter-spacing: 0.04em;
}

.main-title .hint { margin: 4px 0 0; }

.legend-inline {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.72rem;
  color: var(--muted);
}

.legend-inline span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.swatch {
  width: 14px;
  height: 8px;
  border-radius: 2px;
  display: inline-block;
}
.swatch.bass { background: #d9a030; }
.swatch.lead { background: #8fbf4a; }
.swatch.pads { background: #6aa6c9; }
.swatch.drums { background: #d65a3a; }

.panel { margin-bottom: 20px; }

.pattern-panel {
  background: var(--bg1);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  box-shadow: var(--shadow);
}

.tracks-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 10px;
}

.tracks-head h2 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  margin: 0;
  letter-spacing: 0.04em;
}

.tracks-head .hint { margin: 0; }

.tracks {
  display: grid;
  gap: 10px;
}

.track {
  display: grid;
  grid-template-columns: 110px 1fr 80px 90px 1fr auto;
  gap: 10px;
  align-items: center;
  background: var(--bg1);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px 14px;
  transition: border-color 160ms ease, opacity 160ms ease;
}

.track.muted { opacity: 0.45; }
.track.disabled { opacity: 0.35; }
.track.soloed {
  border-color: var(--amber-dim);
  box-shadow: inset 0 0 0 1px rgba(226, 161, 38, 0.15);
}

.track-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
}

.ch {
  color: var(--amber);
  font-size: 0.78rem;
}

.track label { margin: 0; }

.track-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  justify-content: flex-end;
}

.pattern-lanes {
  display: grid;
  gap: 10px;
}

.pattern-lane {
  display: grid;
  grid-template-columns: 168px 1fr;
  gap: 12px;
  align-items: stretch;
  background: var(--bg0);
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 8px 10px;
}

.pattern-lane.off { opacity: 0.35; }
.pattern-lane.muted { opacity: 0.45; }
.pattern-lane.soloed {
  border-color: rgba(226, 161, 38, 0.35);
}
.pattern-lane.locked {
  border-color: rgba(143, 191, 74, 0.35);
}

.lane-meta { min-width: 0; }
.lane-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
}
.lane-sub {
  color: var(--muted);
  font-size: 0.68rem;
  margin-top: 4px;
}
.lane-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 8px;
}
.lane-actions .btn {
  padding: 5px 8px;
  font-size: 0.62rem;
}

.lane-step.editable {
  cursor: pointer;
}
.lane-step.editable:hover {
  background: rgba(226, 161, 38, 0.1);
  border-color: rgba(226, 161, 38, 0.35);
}

.rand-opts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  margin: 8px 0 10px;
}

.chk {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 0;
  color: var(--muted);
  font-size: 0.68rem;
  letter-spacing: 0.03em;
  cursor: pointer;
  user-select: none;
}

.chk input {
  width: auto;
  accent-color: var(--amber);
}

/* ——— Modal editor ——— */

.modal.hidden { display: none; }

.modal {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
  padding: 20px;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.62);
  backdrop-filter: blur(4px);
}

.modal-card {
  position: relative;
  z-index: 1;
  width: min(960px, 100%);
  max-height: min(90vh, 900px);
  overflow: auto;
  background: linear-gradient(180deg, #1c2017, #12140f);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 18px 18px 22px;
}

.modal-head {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 12px;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.modal-head h2 {
  font-family: var(--font-display);
  margin: 0;
  font-size: 1.25rem;
}

.modal-head .hint { margin: 4px 0 0; }

.modal-settings {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px 12px;
  margin-bottom: 12px;
}

.modal-toggles {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: end;
  padding-bottom: 4px;
}

.modal-tools { margin-bottom: 12px; }

.modal-grid-wrap .meter-label { margin-bottom: 8px; }

.modal-grid {
  min-height: 96px;
  gap: 4px;
  padding: 10px;
  background: var(--bg0);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow-x: auto;
}

.modal-grid .lane-step {
  min-height: 80px;
}

@media (max-width: 800px) {
  .modal-settings { grid-template-columns: 1fr 1fr; }
}

.lane-grid {
  display: grid;
  gap: 3px;
  min-height: 64px;
  align-items: end;
}

.lane-step {
  position: relative;
  min-height: 58px;
  border-radius: 4px;
  background: rgba(255,255,255,0.03);
  border: 1px solid transparent;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 2px;
}

.lane-step.playhead {
  border-color: rgba(226, 161, 38, 0.7);
  background: rgba(226, 161, 38, 0.12);
  box-shadow: inset 0 0 12px rgba(226, 161, 38, 0.15);
}

.hit {
  width: 70%;
  border-radius: 3px 3px 1px 1px;
  min-height: 10px;
  transition: height 120ms ease, opacity 120ms ease;
}

.role-bass .hit { background: linear-gradient(180deg, #f0c46a, #d9a030); }
.role-lead .hit { background: linear-gradient(180deg, #b6e06e, #8fbf4a); }
.role-pads .hit { background: linear-gradient(180deg, #9ecce6, #6aa6c9); }
.role-drums .hit { background: linear-gradient(180deg, #f08a6e, #d65a3a); }

.hit.long { width: 85%; }

.hit-label {
  position: absolute;
  top: 3px;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 0.55rem;
  color: var(--muted);
  pointer-events: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mobile-only { display: none; }

@media (max-width: 1200px) {
  .topbar-body {
    grid-template-columns: 1fr 1fr;
  }
  .legend-group { display: none; }
}

@media (max-width: 980px) {
  .shell {
    grid-template-columns: 1fr;
  }

  .sidebar-left {
    position: fixed;
    left: 0;
    top: 0;
    width: min(320px, 92vw);
    z-index: 50;
    transform: translateX(-105%);
    transition: transform 180ms ease;
    box-shadow: var(--shadow);
  }

  body.sidebar-open .sidebar-left {
    transform: translateX(0);
  }

  .topbar {
    position: sticky;
  }

  .topbar-body {
    display: none;
    grid-template-columns: 1fr;
  }

  body.topbar-open .topbar-body {
    display: grid;
  }

  body.sidebar-open::after,
  body.topbar-open::before {
    content: "";
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 40;
  }

  body.topbar-open::before {
    z-index: 15;
    pointer-events: none;
    opacity: 0;
  }

  .mobile-only { display: inline-flex; }

  .topbar-head {
    flex-wrap: wrap;
  }

  .main { padding: 14px 14px 40px; }

  .track {
    grid-template-columns: 1fr 1fr;
  }
  .track-actions { grid-column: 1 / -1; }

  .pattern-lane {
    grid-template-columns: 1fr;
  }

  .top-fields,
  .presets-fields {
    grid-template-columns: 1fr;
  }
}