:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #14141f;
  --bg-tertiary: #1e1e2e;
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-muted: #606070;
  --accent: #00d4ff;
  --accent-secondary: #00ff88;
  --danger: #ff4466;
  --focus-ring: #00d4ff;
  --focus-glow: rgba(0, 212, 255, 0.4);
  --radius-md: 12px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html, body {
  width: 600px; height: 600px; overflow: hidden;
  background: #000;
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}
#app { width: 100%; height: 100%; position: relative; }
.screen { width: 100%; height: 100%; position: absolute; top: 0; left: 0; display: flex; flex-direction: column; }
.screen.hidden { display: none; }
.focusable { transition: all 0.15s ease; border: 2px solid transparent; cursor: pointer; outline: none; }
.focusable:focus { border-color: var(--focus-ring); box-shadow: 0 0 20px var(--focus-glow); }
.hidden { display: none !important; }

/* Header */
.header {
  height: 60px; flex: 0 0 60px;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 18px;
  background: var(--bg-primary);
  border-bottom: 1px solid #22222e;
}
.header .title { font-size: 22px; font-weight: 700; letter-spacing: 0.3px; }
.hdr-right { display: flex; flex-direction: column; align-items: flex-end; gap: 2px; }
.status { font-size: 13px; font-weight: 700; color: var(--text-secondary); letter-spacing: 0.5px; }
.status.s-rec { color: var(--danger); }
.status.s-play { color: var(--accent); }
.kit-name { font-size: 12px; color: var(--accent); letter-spacing: 1.5px; font-weight: 600; }

/* Pad grid */
.pad-grid {
  flex: 1 1 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: 10px;
  padding: 12px 16px;
}
.pad {
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 12px;
  position: relative;
  border: 2px solid transparent;
}
.pad-dot {
  width: 14px; height: 14px; border-radius: 50%;
  box-shadow: 0 0 12px currentColor;
}
.pad-label {
  font-size: 17px; font-weight: 700; letter-spacing: 0.5px;
  color: var(--text-primary); text-align: center;
}
.pad.active {
  background: var(--pad-color);
  box-shadow: 0 0 28px var(--pad-color);
  transform: scale(0.96);
}
.pad.active .pad-label { color: #0a0a0f; }
.pad.active .pad-dot { background: #0a0a0f !important; box-shadow: none; }
/* keep focus ring visible even while flashing */
.pad.focusable:focus { border-color: var(--focus-ring); box-shadow: 0 0 20px var(--focus-glow); }

/* Controls row */
.controls { flex: 0 0 auto; display: flex; gap: 8px; padding: 8px 16px 16px; }
.ctrl-btn {
  flex: 1; min-height: 68px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 5px;
  color: var(--text-secondary);
}
.ctrl-ico { font-size: 22px; line-height: 1; color: var(--text-primary); }
.ctrl-lbl { font-size: 12px; font-weight: 700; letter-spacing: 0.5px; }
.ctrl-btn.on { color: var(--accent); }
.ctrl-btn.on .ctrl-ico { color: var(--accent); }
.ctrl-btn.rec-on { color: var(--danger); }
.ctrl-btn.rec-on .ctrl-ico { color: var(--danger); animation: blink 0.8s steps(2, start) infinite; }
@keyframes blink { 50% { opacity: 0.25; } }

/* Kit list */
.list { flex: 1; display: flex; flex-direction: column; gap: 12px; padding: 20px; }
.kit-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  min-height: 92px;
  display: flex; flex-direction: column; justify-content: center; gap: 6px;
}
.kit-card-name { font-size: 21px; font-weight: 700; letter-spacing: 0.5px; }
.kit-card-desc { font-size: 13px; color: var(--text-secondary); }
.kit-card.selected { background: #13241d; }
.kit-card.selected .kit-card-name { color: var(--accent-secondary); }

/* Help */
.help-body {
  flex: 1; padding: 16px 22px; overflow: auto;
  color: var(--text-secondary); font-size: 15px; line-height: 1.55;
}
.help-body h3 { color: var(--text-primary); font-size: 16px; margin: 14px 0 6px; }
.help-body h3:first-child { margin-top: 0; }
.help-body p { margin-bottom: 8px; }
.help-body b { color: var(--text-primary); }
.key {
  display: inline-block;
  background: var(--bg-tertiary);
  border-radius: 6px; padding: 2px 9px;
  color: var(--text-primary); font-weight: 700; font-size: 13px;
  margin-right: 3px;
}