:root {
  --bg: #0a0b0f;
  --panel: #14151b;
  --panel-strong: #1a1b24;
  --border: #2c2f3a;
  --text: #e6e8ef;
  --muted: #9aa0b1;
  --accent: #b6bfcc;
  --accent-strong: #e2e7f0;
  --warning: #2d2019;
  --warning-border: #5a3d2b;
  --radius: 14px;
  --shadow: 0 18px 32px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Space Grotesk", "Inter", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
}

code {
  font-family: "SF Mono", "JetBrains Mono", monospace;
  font-size: 0.85em;
}

.app {
  min-height: 100vh;
  padding: 28px clamp(16px, 4vw, 36px) 48px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.app-header {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  align-items: flex-start;
}

.kicker {
  text-transform: uppercase;
  letter-spacing: 0.4em;
  font-size: 0.65rem;
  color: var(--muted);
  margin: 0 0 6px;
}

.app-header h1 {
  margin: 0 0 8px;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  letter-spacing: 0.04em;
}

.subhead {
  margin: 0;
  max-width: 680px;
  color: var(--muted);
  line-height: 1.6;
  font-size: 0.95rem;
}

.header-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  transition: 0.2s ease;
}

.btn:hover {
  border-color: var(--accent-strong);
  color: var(--accent-strong);
}

.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #0c0d12;
}

.btn.primary:hover {
  background: var(--accent-strong);
  border-color: var(--accent-strong);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn.tiny {
  padding: 8px 12px;
  border-radius: 12px;
  letter-spacing: 0.1em;
}

.warning-banner {
  padding: 14px 18px;
  border-radius: var(--radius);
  background: var(--warning);
  border: 1px solid var(--warning-border);
  color: #f2d3bd;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
}

.layout {
  display: grid;
  grid-template-columns: minmax(280px, 360px) minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.panel-section h2 {
  margin: 0 0 12px;
  text-transform: uppercase;
  letter-spacing: 0.24em;
  font-size: 0.65rem;
  color: var(--muted);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--muted);
}

.field span {
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

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

select {
  flex: 1;
  background: var(--panel-strong);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 10px;
  border-radius: 10px;
}

.toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--text);
}

.toggle input {
  accent-color: var(--accent);
  transform: scale(1.1);
}

.slider-row {
  display: flex;
  gap: 12px;
  align-items: center;
}

input[type="range"] {
  width: 100%;
  appearance: none;
  height: 6px;
  border-radius: 999px;
  background: #2c2f3a;
}

input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid #0c0d12;
  cursor: pointer;
}

.value {
  min-width: 70px;
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--accent-strong);
}

.segmented {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(90px, 1fr));
  gap: 8px;
}

.segmented button {
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel-strong);
  color: var(--muted);
  padding: 8px 10px;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  cursor: pointer;
}

.segmented button.active {
  background: var(--accent);
  color: #0c0d12;
  border-color: var(--accent);
}

.limiter-readout {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
  background: var(--panel-strong);
  padding: 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
}

.limiter-readout span {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.6rem;
  color: var(--muted);
}

.limiter-readout strong {
  font-size: 1rem;
  letter-spacing: 0.06em;
}

.hud {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
}

.hud-card {
  background: var(--panel-strong);
  border-radius: 12px;
  border: 1px solid var(--border);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.hud-card span {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.6rem;
  color: var(--muted);
}

.hud-card strong {
  font-size: 1rem;
  letter-spacing: 0.06em;
}

.visuals canvas {
  width: 100%;
  height: auto;
  background: #0a0c12;
  border-radius: 12px;
  border: 1px solid var(--border);
}

.grid-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.grid-meta {
  font-size: 0.7rem;
  color: var(--muted);
}

.tile-grid {
  display: grid;
  grid-template-columns: repeat(10, minmax(0, 1fr));
  gap: 6px;
}

.tile {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px;
  min-height: 64px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: background 0.2s ease, box-shadow 0.2s ease;
}

.tile .tile-index {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
}

.tile .tile-freq {
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.8);
}

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