:root {
  --bg: #121820;
  --panel: rgb(18, 21, 26);
  --panel-2: rgb(12, 14, 18);
  --text: #d7dde6;
  --muted: #8b93a0;
  --accent: #6ec8ff;
  --accent-2: #9bb0ff;
  --shadow: rgba(0, 0, 0, 0.5);
  --radius: 10px;
  --font: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  user-select: none;
}

#stage {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  background: var(--bg);
}

.control-strip {
  position: fixed;
  top: 18px;
  left: 18px;
  z-index: 20;
  width: min(320px, calc(100vw - 36px));
  padding: 14px 14px 12px;
  border-radius: var(--radius);
  background: linear-gradient(160deg, var(--panel), var(--panel-2));
  border: 1px solid rgba(180, 190, 205, 0.14);
  box-shadow: 0 12px 36px var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.05);
  transition: opacity 0.22s ease, transform 0.22s ease;
}

.control-strip.is-hidden {
  opacity: 0;
  transform: translateY(-8px);
  pointer-events: none;
}

.brand {
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 10px;
  font-weight: 600;
}

.row {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
}

.btn {
  appearance: none;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(40, 44, 52, 0.9);
  color: var(--text);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 12px;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.btn:hover {
  background: rgba(54, 60, 70, 0.95);
  border-color: rgba(255, 255, 255, 0.18);
}

.btn.primary {
  background: linear-gradient(180deg, rgba(48, 110, 150, 0.95), rgba(32, 74, 108, 0.95));
  border-color: rgba(110, 200, 255, 0.35);
}

.btn.primary:hover {
  border-color: rgba(140, 220, 255, 0.5);
}

.btn.active {
  border-color: rgba(201, 146, 90, 0.55);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.field.grow {
  width: 100%;
}

.field em {
  font-style: normal;
  color: var(--text);
  margin-left: 4px;
}

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

.field select {
  appearance: none;
  background: rgba(18, 20, 24, 0.95);
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 12px;
  text-transform: none;
  letter-spacing: 0;
}

.field input[type="range"] {
  accent-color: var(--accent);
  height: 18px;
}

.hint {
  margin-top: 2px;
  font-size: 11px;
  color: var(--muted);
}

.hint kbd {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font-size: 10px;
}

/* Phone-only: always-reachable strip toggle. Hidden on desktop. */
.mobile-controls-toggle {
  display: none;
}

@media (max-width: 768px) {
  .mobile-controls-toggle {
    display: block;
    position: fixed;
    top: 12px;
    right: 12px;
    z-index: 30;
    appearance: none;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background: rgba(18, 21, 26, 0.92);
    color: var(--text);
    border-radius: 8px;
    padding: 8px 12px;
    font-size: 11px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    cursor: pointer;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    transition: background 0.15s ease, border-color 0.15s ease, opacity 0.22s ease;
  }

  .mobile-controls-toggle:active {
    background: rgba(40, 44, 52, 0.95);
    border-color: rgba(255, 255, 255, 0.22);
  }

  .control-strip {
    transition: opacity 0.22s ease, transform 0.22s ease, max-height 0.22s ease;
  }
}