:root {
  color-scheme: dark;
  --bg: #07100f;
  --panel: #101b1a;
  --panel-2: #172827;
  --line: #335653;
  --text: #f4fff8;
  --muted: #a9c8c1;
  --accent: #ffd24a;
  --accent-2: #ff5f7a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input,
select {
  font: inherit;
}

button,
select,
input {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel-2);
  color: var(--text);
}

button {
  min-height: 38px;
  padding: 0 14px;
  cursor: pointer;
}

button:hover,
button:focus-visible {
  border-color: var(--accent);
}

.shell {
  width: min(1180px, calc(100vw - 24px));
  margin: 0 auto;
  padding: 20px 0 32px;
}

.topbar,
.panel,
.grid-head,
.step {
  display: grid;
  gap: 12px;
  align-items: center;
}

.topbar {
  grid-template-columns: 1fr auto;
  margin-bottom: 16px;
}

.topbar p {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 6vw, 4.5rem);
  line-height: 0.9;
}

.panel {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  padding: 14px;
  margin-bottom: 14px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.performance {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 0.85rem;
}

input,
select {
  min-height: 36px;
  padding: 0 8px;
}

input[type="range"] {
  padding: 0;
}

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

.sequencer {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.grid-head,
.step {
  grid-template-columns: 54px 120px 1fr 72px;
  min-width: 520px;
}

.grid-head {
  position: sticky;
  top: 0;
  padding: 10px 12px;
  background: #0b1514;
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.steps {
  display: grid;
}

.step {
  padding: 8px 12px;
  border-top: 1px solid color-mix(in srgb, var(--line) 55%, transparent);
}

.step:nth-child(8n + 1),
.step:nth-child(8n + 2),
.step:nth-child(8n + 3),
.step:nth-child(8n + 4) {
  background: rgba(255, 255, 255, 0.025);
}

.step-number {
  color: var(--accent);
  font-weight: 700;
}

.accent-cell {
  display: flex;
  align-items: center;
  justify-content: center;
}

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

@media (max-width: 760px) {
  .panel,
  .performance,
  .topbar {
    grid-template-columns: 1fr;
  }

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