/* NISPS Playground - Dark theme, mobile-first */

:root {
  --bg: #0d0d0d;
  --bg-surface: #1a1a1a;
  --bg-elevated: #252525;
  --text: #ccc;
  --text-dim: #666;
  --accent: #00ff88;
  --accent-dim: #00cc6a;
  --danger: #ff3366;
  --good: #00ff88;
  --bad: #ff6644;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro', 'Segoe UI', system-ui, sans-serif;
  font-size: 14px;
  height: 100%;
  overflow: hidden;
  touch-action: manipulation;
  -webkit-user-select: none;
  user-select: none;
}

/* --- Layout --- */
.app {
  display: grid;
  grid-template-rows: auto 1fr auto auto auto;
  height: 100vh;
  height: 100dvh;
  max-width: 600px;
  margin: 0 auto;
}

/* Header */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  border-bottom: 1px solid #222;
}

.header h1 {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: var(--accent);
}

.header button {
  background: none;
  border: 1px solid #333;
  color: var(--text-dim);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 14px;
}

/* Visual canvas */
.visual-container {
  position: relative;
  min-height: 0;
}

.visual-container canvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* Preset pills */
.presets {
  position: absolute;
  top: 8px;
  left: 8px;
  display: flex;
  gap: 6px;
  z-index: 2;
}

.preset-pill {
  background: rgba(26, 26, 26, 0.8);
  border: 1px solid #333;
  color: var(--text-dim);
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 11px;
  cursor: pointer;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.preset-pill:active {
  background: rgba(0, 255, 136, 0.15);
  border-color: var(--accent-dim);
  color: var(--accent);
}

/* Parameter display */
.param-container {
  padding: 6px 12px;
  background: var(--bg-surface);
  border-top: 1px solid #222;
}

.param-row {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 22px;
}

.param-label {
  width: 42px;
  font-size: 10px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  flex-shrink: 0;
}

.param-track {
  flex: 1;
  height: 8px;
  background: #222;
  border-radius: 4px;
  overflow: hidden;
  position: relative;
}

.draggable .param-track {
  cursor: ew-resize;
  height: 14px;
  border: 1px solid #333;
}

.draggable .param-track:active {
  border-color: var(--accent-dim);
}

.param-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.05s ease-out;
}

.param-value {
  width: 32px;
  font-size: 10px;
  color: var(--text-dim);
  text-align: right;
  font-family: monospace;
  flex-shrink: 0;
}

/* Controls area */
.controls-area {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 12px;
  background: var(--bg-surface);
  border-top: 1px solid #222;
}

#joystick-container {
  flex-shrink: 0;
}

#controls-container {
  flex: 1;
  min-width: 0;
}

.controls-mode-toggle {
  display: flex;
  gap: 4px;
  margin-bottom: 8px;
}

.mode-btn {
  flex: 1;
  padding: 6px 0;
  background: var(--bg-elevated);
  border: 1px solid #333;
  color: var(--text-dim);
  font-size: 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s;
}

.mode-btn.active {
  background: rgba(0, 255, 136, 0.1);
  border-color: var(--accent-dim);
  color: var(--accent);
}

.controls-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 8px;
}

.btn {
  padding: 8px 14px;
  background: var(--bg-elevated);
  border: 1px solid #333;
  color: var(--text);
  font-size: 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.1s;
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.96);
}

.btn-primary {
  background: rgba(0, 255, 136, 0.12);
  border-color: var(--accent-dim);
  color: var(--accent);
}

.btn-primary:active {
  background: rgba(0, 255, 136, 0.25);
}

.btn-danger {
  color: var(--danger);
  border-color: #552233;
}

.btn-danger:active {
  background: rgba(255, 51, 102, 0.15);
}

.btn-good {
  background: rgba(0, 255, 136, 0.12);
  border-color: var(--accent-dim);
  color: var(--good);
  font-size: 18px;
  padding: 8px 20px;
}

.btn-good:active {
  background: rgba(0, 255, 136, 0.3);
}

.btn-bad {
  background: rgba(255, 102, 68, 0.1);
  border-color: #553322;
  color: var(--bad);
  font-size: 18px;
  padding: 8px 20px;
}

.btn-bad:active {
  background: rgba(255, 102, 68, 0.25);
}

.flash {
  animation: flash-anim 0.2s ease-out;
}

@keyframes flash-anim {
  0% { box-shadow: 0 0 12px var(--accent); }
  100% { box-shadow: none; }
}

.controls-status {
  display: flex;
  gap: 12px;
  font-size: 11px;
  color: var(--text-dim);
  font-family: monospace;
  margin-bottom: 8px;
}

.metrics-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 3px 10px;
  font-size: 10px;
  margin-bottom: 8px;
  font-family: monospace;
}

.metric-label {
  color: #707070;
}

.metric-value {
  color: #b5b5b5;
  text-align: right;
}

.loss-plot-wrap {
  width: 100%;
  border: 1px solid #2a2a2a;
  border-radius: 8px;
  overflow: hidden;
}

#loss-plot {
  width: 100%;
  height: 86px;
  display: block;
}

.hidden { display: none !important; }

/* Help overlay */
.help-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.help-content {
  background: var(--bg-surface);
  border: 1px solid #333;
  border-radius: 12px;
  padding: 20px;
  max-width: 360px;
  max-height: 80vh;
  overflow-y: auto;
  font-size: 13px;
  line-height: 1.5;
}

.help-content h2 {
  color: var(--accent);
  font-size: 16px;
  margin-bottom: 12px;
}

.help-content h3 {
  color: var(--text);
  font-size: 13px;
  margin-top: 14px;
  margin-bottom: 4px;
}

.help-content p, .help-content li {
  color: var(--text-dim);
  margin-bottom: 6px;
}

.help-content ol {
  padding-left: 18px;
}

/* Responsive: wider screens (foldable inner, tablet) */
@media (min-width: 500px) {
  .app {
    max-width: 800px;
  }

  .controls-area {
    padding: 12px 16px;
  }

  .param-container {
    padding: 8px 16px;
  }
}