/* === Variables === */
:root {
  --bg-dark: #0a0a0f;
  --bg-gradient: radial-gradient(ellipse at center, #1a1a2e 0%, #0a0a0f 70%);
  --accent-cyan: #00fff2;
  --accent-magenta: #ff00aa;
  --accent-yellow: #ffea00;
  --accent-green: #00ff88;
  --text-primary: #e0e0e0;
  --text-muted: #888;
  --canvas-bg-inner: #1a1a2e;
  --canvas-bg-outer: #0a0a0f;
  --highlight-color: rgba(255, 255, 255, 0.5);
  --graph-bg: rgba(10, 10, 15, 0.9);
  --graph-grid: rgba(255, 255, 255, 0.1);
}

/* === Themes === */
[data-theme="dark"] {
  --bg-dark: #0a0a0f;
  --bg-gradient: radial-gradient(ellipse at center, #1a1a2e 0%, #0a0a0f 70%);
  --text-primary: #e0e0e0;
  --text-muted: #888;
  --canvas-bg-inner: #1a1a2e;
  --canvas-bg-outer: #0a0a0f;
  --highlight-color: rgba(255, 255, 255, 0.5);
  --graph-bg: rgba(10, 10, 15, 0.9);
  --graph-grid: rgba(255, 255, 255, 0.1);
}

[data-theme="light"] {
  --bg-dark: #d0d0dc;
  --bg-gradient: radial-gradient(ellipse at center, #e8e8f0 0%, #d0d0dc 70%);
  --text-primary: #1a1a2e;
  --text-muted: #666;
  --canvas-bg-inner: #e8e8f0;
  --canvas-bg-outer: #d0d0dc;
  --highlight-color: rgba(0, 0, 0, 0.3);
  --graph-bg: rgba(220, 220, 230, 0.9);
  --graph-grid: rgba(0, 0, 0, 0.1);
}

[data-theme="light"] body {
  background: var(--bg-gradient);
}

[data-theme="light"] .wizard,
[data-theme="light"] .container {
  color: var(--text-primary);
}

[data-theme="light"] canvas {
  background: radial-gradient(circle at 30% 30%, var(--canvas-bg-inner) 0%, var(--canvas-bg-outer) 100%);
}

[data-theme="light"] .canvas-wrapper {
  box-shadow:
    0 0 60px rgba(0, 100, 120, 0.2),
    0 0 120px rgba(100, 0, 80, 0.1),
    inset 0 0 60px rgba(255, 255, 255, 0.3);
}

[data-theme="light"] button {
  background: rgba(255, 255, 255, 0.3);
}

[data-theme="light"] button.secondary {
  background: rgba(255, 255, 255, 0.2);
}

[data-theme="light"] .keyboard-hints {
  color: var(--text-muted);
}

[data-theme="light"] input,
[data-theme="light"] select {
  background: rgba(255, 255, 255, 0.8);
  color: #1a1a2e;
}

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

body {
  min-height: 100vh;
  background: var(--bg-dark);
  background-image: var(--bg-gradient);
  font-family: 'Rajdhani', sans-serif;
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

/* === Skip Navigation === */
.skip-to-main {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-cyan);
  color: #000;
  padding: 0.8rem 1.5rem;
  font-family: 'Orbitron', sans-serif;
  font-size: 0.8rem;
  z-index: 10000;
  border-radius: 0 0 8px 8px;
  text-decoration: none;
}

.skip-to-main:focus {
  top: 0;
}

/* === Wizard === */
.wizard {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  padding: 2rem;
  max-height: 100vh;
  overflow-y: auto;
}

.wizard h1 {
  font-family: 'Orbitron', sans-serif;
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-magenta));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.wizard-subtitle {
  color: var(--text-muted);
  font-size: 1.1rem;
  letter-spacing: 0.1em;
}

.wizard-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  background: rgba(255, 255, 255, 0.03);
  padding: 2rem;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  min-width: 320px;
}

.presets {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.preset-btn {
  flex: 1;
  padding: 0.6rem 0.8rem;
  font-size: 0.75rem;
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: transparent;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.2s;
}

.preset-btn:hover {
  border-color: var(--accent-cyan);
  background: rgba(0, 255, 242, 0.1);
}

.preset-btn.active {
  border-color: var(--accent-cyan);
  background: rgba(0, 255, 242, 0.2);
  color: var(--accent-cyan);
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.input-group label {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.input-group input {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 0.8rem 1rem;
  font-family: 'Rajdhani', sans-serif;
  font-size: 1.2rem;
  color: var(--text-primary);
  border-radius: 6px;
  outline: none;
  transition: border-color 0.3s;
}

.input-group input[type="number"] {
  -moz-appearance: textfield;
  appearance: textfield;
}

.input-group input[type="number"]::-webkit-inner-spin-button,
.input-group input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  appearance: none;
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-wrapper input {
  width: 100%;
  padding-right: 2.5rem;
}

.spinner-btns {
  position: absolute;
  right: 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  opacity: 0;
  transition: opacity 0.2s;
}

.input-wrapper:hover .spinner-btns,
.input-wrapper:focus-within .spinner-btns {
  opacity: 1;
}

.spinner-btn {
  width: 20px;
  height: 14px;
  background: rgba(0, 255, 242, 0.2);
  border: 1px solid var(--accent-cyan);
  border-radius: 3px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  padding: 0;
}

.spinner-btn:hover {
  background: rgba(0, 255, 242, 0.4);
}

.spinner-btn svg {
  width: 10px;
  height: 10px;
  fill: var(--accent-cyan);
}

.input-group input:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 15px rgba(0, 255, 242, 0.2);
}

.input-group select {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 0.8rem 1rem;
  font-family: 'Rajdhani', sans-serif;
  font-size: 1.2rem;
  color: var(--text-primary);
  border-radius: 6px;
  outline: none;
  transition: border-color 0.3s;
  width: 100%;
  cursor: pointer;
}

.input-group select:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 15px rgba(0, 255, 242, 0.2);
}

.input-group select option {
  background: #0a0a0f;
  color: var(--text-primary);
}

.advanced-settings {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

#advancedToggle {
  font-size: 0.75rem;
  width: 100%;
  text-align: center;
}

.save-load-row {
  display: flex;
  gap: 0.5rem;
}

.save-load-row button {
  flex: 1;
  font-size: 0.75rem;
}

#savedConfigsList {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.saved-config-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.6rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.03);
}

.saved-config-item .config-name {
  flex: 1;
  font-family: 'Rajdhani', sans-serif;
  font-size: 0.9rem;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.saved-config-item button {
  padding: 0.3rem 0.6rem;
  font-size: 0.65rem;
}

.saved-config-item .delete-config-btn {
  padding: 0.3rem 0.5rem;
  font-size: 0.8rem;
  line-height: 1;
}

#startBtn {
  margin-top: 1rem;
  padding: 1rem 2rem;
  font-size: 1rem;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-magenta));
  border: none;
  color: #000;
  font-weight: 700;
}

#startBtn:hover {
  box-shadow: 0 0 40px rgba(0, 255, 242, 0.5);
}

/* === Simulation === */
.container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
}

.container h1 {
  font-size: 1.8rem;
  letter-spacing: 0.2em;
}

h1 {
  font-family: 'Orbitron', sans-serif;
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-magenta));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 0 40px rgba(0, 255, 242, 0.3);
  animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.8; }
}

.canvas-wrapper {
  position: relative;
  border-radius: 50%;
  padding: 4px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-magenta));
  box-shadow:
    0 0 60px rgba(0, 255, 242, 0.3),
    0 0 120px rgba(255, 0, 170, 0.2),
    inset 0 0 60px rgba(0, 0, 0, 0.5);
  max-width: 90vw;
  max-height: 70vh;
  aspect-ratio: 1;
}

.canvas-wrapper.shape-circle {
  border-radius: 50%;
}

.canvas-wrapper.shape-rectangle {
  border-radius: 12px;
}

.canvas-wrapper.shape-hexagon {
  border-radius: 0;
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
}

canvas#simulation {
  display: block;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, var(--canvas-bg-inner) 0%, var(--canvas-bg-outer) 100%);
  cursor: crosshair;
  touch-action: none;
  max-width: 100%;
  height: auto;
  position: relative;
  z-index: 1;
}

.starfield-canvas {
  position: absolute;
  top: 4px;
  left: 4px;
  width: calc(100% - 8px);
  height: calc(100% - 8px);
  pointer-events: none;
  z-index: 0;
  border-radius: 50%;
}

.shape-rectangle .starfield-canvas {
  border-radius: 8px;
}

.shape-hexagon .starfield-canvas {
  border-radius: 0;
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
}

.shape-rectangle canvas {
  border-radius: 8px;
}

.shape-hexagon canvas {
  border-radius: 0;
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
}

.stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
  font-family: 'Orbitron', sans-serif;
  font-size: 1rem;
  letter-spacing: 0.1em;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-cyan);
  text-shadow: 0 0 20px var(--accent-cyan);
}

.stat-value.magenta { color: var(--accent-magenta); text-shadow: 0 0 20px var(--accent-magenta); }
.stat-value.yellow { color: var(--accent-yellow); text-shadow: 0 0 20px var(--accent-yellow); }
.stat-value.green { color: var(--accent-green); text-shadow: 0 0 20px var(--accent-green); }

.controls {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

button {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.6rem 1.2rem;
  border: 1px solid var(--accent-cyan);
  background: transparent;
  color: var(--accent-cyan);
  cursor: pointer;
  transition: all 0.3s ease;
}

button:hover {
  background: rgba(0, 255, 242, 0.1);
  box-shadow: 0 0 20px rgba(0, 255, 242, 0.3);
}

button.active {
  background: rgba(0, 255, 242, 0.3);
  box-shadow: 0 0 20px rgba(0, 255, 242, 0.5);
}

button.secondary {
  border-color: var(--text-muted);
  color: var(--text-muted);
}

button.secondary:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

button.danger {
  border-color: var(--accent-magenta);
  color: var(--accent-magenta);
}

button.danger:hover {
  background: rgba(255, 0, 170, 0.1);
  box-shadow: 0 0 20px rgba(255, 0, 170, 0.3);
}

button.danger.active {
  background: rgba(255, 0, 170, 0.3);
}

.controls-secondary {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 0.5rem;
}

.controls-secondary select {
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid var(--text-muted);
  color: var(--text-primary);
  padding: 0.5rem 0.8rem;
  font-family: 'Orbitron', sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  cursor: pointer;
  outline: none;
}

.controls-secondary select:hover,
.controls-secondary select:focus {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.controls-secondary select option {
  background: var(--bg-dark);
  color: var(--text-primary);
}

.mode-indicator {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
  min-height: 1.2rem;
}

.mode-indicator.active {
  color: var(--accent-yellow);
}

.keyboard-hints {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
  letter-spacing: 0.05em;
}

@media (hover: none) {
  .keyboard-hints {
    display: none;
  }
}

.paused-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: 'Orbitron', sans-serif;
  font-size: 2rem;
  color: var(--accent-cyan);
  text-shadow: 0 0 30px var(--accent-cyan);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s;
}

.paused-overlay.visible {
  opacity: 1;
}

/* === Fullscreen === */
body:fullscreen, body:-webkit-full-screen {
  background: var(--bg-dark);
}

:fullscreen .container, :-webkit-full-screen .container {
  transform: scale(1.1);
}

:fullscreen .audio-panel, :-webkit-full-screen .audio-panel {
  top: auto;
  bottom: 1rem;
  right: 50%;
  transform: translateX(50%);
}

/* === Audio === */
.audio-panel {
  position: fixed;
  top: 1rem;
  right: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.7rem;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  z-index: 100;
  transition: opacity 0.3s;
}

.audio-panel:hover {
  border-color: rgba(0, 255, 242, 0.3);
}

.audio-panel button {
  padding: 0.3rem 0.5rem;
  font-size: 0.85rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  min-width: 2rem;
  text-align: center;
  line-height: 1;
}

.audio-panel button.active {
  border-color: var(--accent-cyan);
  background: rgba(0, 255, 242, 0.2);
}

.audio-panel select {
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--text-primary);
  padding: 0.3rem 0.4rem;
  font-family: 'Rajdhani', sans-serif;
  font-size: 0.75rem;
  border-radius: 8px;
  cursor: pointer;
  outline: none;
  max-width: 140px;
}

.audio-panel select:hover,
.audio-panel select:focus {
  border-color: var(--accent-cyan);
}

.audio-panel select option,
.audio-panel select optgroup {
  background: #0a0a0f;
  color: var(--text-primary);
}

.audio-panel select optgroup {
  font-weight: 700;
  font-size: 0.75rem;
  color: var(--accent-cyan);
}

.volume-slider {
  display: flex;
  align-items: center;
}

.volume-slider input[type="range"] {
  width: 60px;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 2px;
  outline: none;
}

.volume-slider input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 10px;
  height: 10px;
  background: var(--accent-cyan);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 8px var(--accent-cyan);
}

.volume-slider input[type="range"]::-moz-range-thumb {
  width: 10px;
  height: 10px;
  background: var(--accent-cyan);
  border-radius: 50%;
  cursor: pointer;
  border: none;
  box-shadow: 0 0 8px var(--accent-cyan);
}

/* === Graph === */
.graph-container {
  background: rgba(0, 0, 0, 0.3);
  border-radius: 8px;
  padding: 0.8rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.graph-title {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
  text-align: center;
}

.graph-canvas {
  display: block;
  border-radius: 4px;
}

/* === Modal === */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s;
}

.modal-overlay.visible {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--bg-dark);
  border: 1px solid var(--accent-cyan);
  border-radius: 12px;
  padding: 1.5rem;
  max-width: 450px;
  width: 90%;
  box-shadow: 0 0 60px rgba(0, 255, 242, 0.3);
}

.modal h2 {
  font-family: 'Orbitron', sans-serif;
  font-size: 1.1rem;
  color: var(--accent-cyan);
  margin-bottom: 1rem;
  letter-spacing: 0.1em;
}

.share-preview {
  margin-bottom: 1rem;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.share-preview canvas {
  display: block;
  width: 100%;
  height: auto;
}

.share-stats {
  background: rgba(0, 0, 0, 0.3);
  padding: 0.8rem;
  border-radius: 6px;
  margin-bottom: 1rem;
  font-size: 0.8rem;
  line-height: 1.6;
}

.share-stats .stat-row {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding: 0.3rem 0;
}

.share-stats .stat-row:last-child {
  border-bottom: none;
}

.share-stats .stat-label {
  color: var(--text-muted);
}

.share-stats .stat-value {
  color: var(--accent-cyan);
  font-family: 'Orbitron', sans-serif;
}

.share-section {
  margin-bottom: 1rem;
}

.share-section label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.3rem;
}

.modal-input {
  width: 100%;
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 0.6rem;
  color: var(--text-primary);
  font-family: monospace;
  font-size: 0.75rem;
  border-radius: 6px;
  word-break: break-all;
}

.modal-buttons {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.modal-buttons button {
  flex: 1;
  min-width: 80px;
  font-size: 0.7rem;
  padding: 0.5rem 0.8rem;
}

/* === Toast === */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--accent-green);
  color: #000;
  padding: 0.8rem 1.5rem;
  border-radius: 8px;
  font-family: 'Orbitron', sans-serif;
  font-size: 0.8rem;
  opacity: 0;
  transition: all 0.3s;
  z-index: 1001;
}

.toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast.error {
  background: var(--accent-magenta);
}

/* === Tooltip === */
.ball-tooltip {
  position: fixed;
  z-index: 1000;
  background: rgba(10, 10, 20, 0.92);
  border: 1px solid var(--accent-cyan);
  border-radius: 6px;
  padding: 8px 12px;
  font-family: 'Rajdhani', sans-serif;
  font-size: 0.8rem;
  color: var(--text-primary);
  pointer-events: none;
  box-shadow: 0 0 12px rgba(0, 255, 242, 0.2);
  min-width: 110px;
}

[data-theme="light"] .ball-tooltip {
  background: rgba(240, 240, 250, 0.95);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}

.ball-tooltip-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  line-height: 1.5;
}

.ball-tooltip-row span {
  color: var(--text-muted);
}

.ball-tooltip-row strong {
  color: var(--accent-cyan);
}

/* === Recording === */
#recordingIndicator {
  display: none;
  font-family: 'Orbitron', sans-serif;
  font-size: 0.75rem;
  color: #ff4444;
  letter-spacing: 0.1em;
  text-align: center;
}

#recordingIndicator.active {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  animation: recBlink 1s ease-in-out infinite;
}

#recordingIndicator.active::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #ff4444;
  animation: recDot 1s ease-in-out infinite;
}

@keyframes recBlink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes recDot {
  0%, 100% { box-shadow: 0 0 4px #ff4444; }
  50% { box-shadow: 0 0 10px #ff4444, 0 0 20px rgba(255, 68, 68, 0.4); }
}

/* === Achievements === */
.achievement-toast {
  position: fixed;
  top: 60px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  z-index: 8000;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  background: rgba(12, 12, 22, 0.95);
  border: 1px solid var(--accent-yellow);
  border-radius: 10px;
  box-shadow: 0 0 20px rgba(255, 234, 0, 0.25), 0 6px 24px rgba(0, 0, 0, 0.4);
  font-family: 'Rajdhani', sans-serif;
  color: var(--text-primary);
  opacity: 0;
  pointer-events: none;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  white-space: nowrap;
}

[data-theme="light"] .achievement-toast {
  background: rgba(245, 245, 255, 0.97);
}

.achievement-toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.achievement-toast-icon {
  font-size: 1.5rem;
}

.achievement-toast div {
  display: flex;
  flex-direction: column;
}

.achievement-toast strong {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.75rem;
  color: var(--accent-yellow);
  letter-spacing: 0.08em;
}

.achievement-toast small {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.achievement-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 7000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0);
  transition: background 0.3s ease;
}

.achievement-modal-overlay.visible {
  background: rgba(0, 0, 0, 0.6);
}

.achievement-modal {
  background: rgba(12, 12, 22, 0.97);
  border: 1px solid var(--accent-cyan);
  border-radius: 12px;
  padding: 20px 24px;
  max-width: 500px;
  width: 90vw;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 0 30px rgba(0, 255, 242, 0.15);
  text-align: center;
  transform: scale(0.95);
  opacity: 0;
  transition: all 0.3s ease;
}

.achievement-modal-overlay.visible .achievement-modal {
  transform: scale(1);
  opacity: 1;
}

[data-theme="light"] .achievement-modal {
  background: rgba(245, 245, 255, 0.98);
}

.achievement-modal h2 {
  font-family: 'Orbitron', sans-serif;
  font-size: 1rem;
  color: var(--accent-cyan);
  margin-bottom: 14px;
  letter-spacing: 0.1em;
}

.achievement-count {
  color: var(--accent-yellow);
  font-size: 0.75rem;
}

.achievement-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 8px;
}

.achievement-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 10px 6px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.03);
  opacity: 0.35;
  transition: all 0.2s ease;
}

.achievement-card.unlocked {
  opacity: 1;
  border-color: rgba(255, 234, 0, 0.3);
  background: rgba(255, 234, 0, 0.05);
}

.achievement-card-icon {
  font-size: 1.4rem;
}

.achievement-card strong {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.65rem;
  color: var(--text-primary);
  letter-spacing: 0.05em;
}

.achievement-card small {
  font-family: 'Rajdhani', sans-serif;
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.2;
}

/* Time control */
.time-control {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'Orbitron', sans-serif;
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
}

.time-control input[type="range"] {
  width: 80px;
  accent-color: var(--accent-cyan);
  cursor: pointer;
}

#timeScaleValue {
  min-width: 2.5em;
  text-align: center;
  color: var(--accent-cyan);
  font-weight: 700;
}

/* FPS counter */
#fpsCounter {
  display: none;
  position: fixed;
  top: 4px;
  left: 8px;
  font-family: 'Orbitron', sans-serif;
  font-size: 0.7rem;
  color: var(--accent-green);
  opacity: 0.7;
  z-index: 200;
  pointer-events: none;
  letter-spacing: 0.05em;
}

/* === Walkthrough === */
.wt-overlay {
  position: fixed;
  inset: 0;
  z-index: 9000;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.wt-overlay.active {
  pointer-events: auto;
}

.wt-backdrop {
  position: fixed;
  inset: 0;
  z-index: 9001;
  transition: opacity 0.3s ease;
}

.wt-spotlight {
  position: fixed;
  z-index: 9002;
  border-radius: 8px;
  box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.75);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
}

.wt-spotlight.round {
  border-radius: 50%;
}

.wt-spotlight::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: inherit;
  border: 2px solid var(--accent-cyan);
  opacity: 0.6;
  animation: wt-pulse-ring 2s ease-in-out infinite;
}

@keyframes wt-pulse-ring {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 0.3; transform: scale(1.02); }
}

.wt-card {
  position: fixed;
  z-index: 9010;
  width: 340px;
  max-width: calc(100vw - 32px);
  background: rgba(12, 12, 22, 0.96);
  border: 1px solid var(--accent-cyan);
  border-radius: 12px;
  padding: 20px 22px 16px;
  box-shadow:
    0 0 30px rgba(0, 255, 242, 0.15),
    0 8px 32px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  opacity: 0;
  transform: translateY(8px);
}

.wt-card.visible {
  opacity: 1;
  transform: translateY(0);
}

[data-theme="light"] .wt-card {
  background: rgba(240, 240, 250, 0.97);
  box-shadow:
    0 0 30px rgba(0, 100, 120, 0.1),
    0 8px 32px rgba(0, 0, 0, 0.15);
}

.wt-card-step {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-magenta);
  margin-bottom: 6px;
}

.wt-card-title {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-cyan);
  margin-bottom: 8px;
  line-height: 1.3;
}

.wt-card-body {
  font-family: 'Rajdhani', sans-serif;
  font-size: 0.9rem;
  font-weight: 300;
  color: var(--text-primary);
  line-height: 1.5;
  margin-bottom: 16px;
}

.wt-card-body kbd {
  display: inline-block;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 4px;
  padding: 1px 6px;
  font-family: 'Orbitron', sans-serif;
  font-size: 0.65rem;
  color: var(--accent-yellow);
  vertical-align: middle;
}

[data-theme="light"] .wt-card-body kbd {
  background: rgba(0, 0, 0, 0.07);
  border-color: rgba(0, 0, 0, 0.15);
}

.wt-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.wt-dots {
  display: flex;
  gap: 5px;
}

.wt-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: all 0.3s ease;
}

.wt-dot.active {
  background: var(--accent-cyan);
  box-shadow: 0 0 6px var(--accent-cyan);
}

.wt-dot.done {
  background: var(--accent-green);
}

.wt-card-buttons {
  display: flex;
  gap: 6px;
}

.wt-btn {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 6px 14px;
  border: 1px solid var(--accent-cyan);
  background: transparent;
  color: var(--accent-cyan);
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s ease;
  line-height: 1;
}

.wt-btn:hover {
  background: rgba(0, 255, 242, 0.15);
  box-shadow: 0 0 12px rgba(0, 255, 242, 0.2);
}

.wt-btn.primary {
  background: rgba(0, 255, 242, 0.2);
}

.wt-btn.skip {
  border-color: var(--text-muted);
  color: var(--text-muted);
}

.wt-btn.skip:hover {
  border-color: var(--text-primary);
  color: var(--text-primary);
  background: transparent;
  box-shadow: none;
}

#walkthroughBtn {
  font-size: 0.85rem;
  min-width: auto;
  padding: 0.4rem 0.7rem;
  line-height: 1;
}

/* === Responsive === */
@media (max-width: 768px) {
  body {
    overflow-x: hidden;
    overflow-y: auto;
    justify-content: flex-start;
  }

  .wizard h1 {
    font-size: 1.8rem;
    letter-spacing: 0.15em;
  }

  .wizard-form {
    min-width: 0;
    width: 90vw;
    max-width: 400px;
  }

  .container {
    gap: 0.8rem;
    padding: 0.8rem;
    width: 100%;
  }

  .container h1 {
    font-size: 1.3rem;
    letter-spacing: 0.1em;
  }

  .canvas-wrapper {
    max-height: 55vh;
    max-width: 85vw;
  }

  .stats {
    gap: 0.8rem;
  }

  .stat-value {
    font-size: 1.2rem;
  }

  .controls {
    gap: 0.4rem;
  }

  .controls-secondary {
    gap: 0.4rem;
  }

  .audio-panel {
    top: auto;
    bottom: 0.5rem;
    right: 50%;
    transform: translateX(50%);
  }

  .wt-card {
    width: 280px;
  }

  .achievement-grid {
    grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  }
}

@media (max-width: 480px) {
  .wizard {
    padding: 1rem;
    gap: 1rem;
  }

  .wizard h1 {
    font-size: 1.3rem;
    letter-spacing: 0.1em;
  }

  .wizard-form {
    padding: 1.2rem;
    gap: 1rem;
  }

  .presets {
    flex-wrap: wrap;
  }

  .preset-btn {
    min-width: calc(50% - 0.25rem);
  }

  .container {
    gap: 0.6rem;
    padding: 0.5rem;
  }

  .container h1 {
    font-size: 1rem;
    letter-spacing: 0.08em;
  }

  .canvas-wrapper {
    max-height: 45vh;
    max-width: 95vw;
  }

  .stats {
    gap: 0.5rem 1rem;
  }

  .stat-label {
    font-size: 0.65rem;
  }

  .stat-value {
    font-size: 1rem;
  }

  button {
    padding: 0.5rem 0.8rem;
    font-size: 0.65rem;
  }

  .controls {
    gap: 0.3rem;
  }

  .controls-secondary {
    gap: 0.3rem;
  }

  .controls-secondary select {
    font-size: 0.6rem;
    padding: 0.4rem 0.6rem;
  }

  .keyboard-hints {
    display: none;
  }

  .audio-panel {
    gap: 0.3rem;
    padding: 0.3rem 0.5rem;
    max-width: 95vw;
  }

  .audio-panel select {
    max-width: 100px;
    font-size: 0.65rem;
  }

  .volume-slider input[type="range"] {
    width: 40px;
  }

  .graph-container {
    padding: 0.5rem;
  }

  .modal {
    padding: 1rem;
  }

  .modal-buttons button {
    font-size: 0.6rem;
    padding: 0.4rem 0.6rem;
    min-width: 60px;
  }

  .wt-card {
    width: calc(100vw - 24px);
    padding: 14px 16px 12px;
  }

  .achievement-grid {
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 6px;
  }

  .achievement-card {
    padding: 8px 4px;
  }

  .time-control {
    font-size: 0.6rem;
  }

  .time-control input[type="range"] {
    width: 60px;
  }
}