:root {
  color-scheme: dark;
  --bg: #070811;
  --panel-bg: rgba(10, 14, 28, 0.92);
  --panel-border: rgba(82, 232, 255, 0.35);
  --accent: #52e8ff;
  --text: #e9f4ff;
  --muted: #8aa3c4;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  overscroll-behavior: none;
}

#game-canvas {
  display: block;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

.hidden {
  display: none !important;
}

/* Hidden Debug Panel */
#debug-panel {
  position: fixed;
  top: max(10px, env(safe-area-inset-top));
  left: max(10px, env(safe-area-inset-left));
  width: min(330px, calc(100vw - 20px));
  max-height: calc(100vh - 24px);
  overflow-y: auto;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  padding: 12px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 12px;
  color: var(--text);
  z-index: 50;
  backdrop-filter: blur(8px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.6);
  touch-action: pan-y;
}

#debug-panel .dbg-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

#debug-panel .dbg-title {
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.06em;
}

#debug-panel .dbg-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px 8px;
  margin-bottom: 10px;
  padding: 6px 8px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 6px;
  color: var(--muted);
}

#debug-panel .dbg-stats strong {
  color: var(--text);
}

#debug-panel .dbg-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-bottom: 10px;
}

#debug-panel button {
  min-height: 34px;
  padding: 6px 8px;
  border-radius: 6px;
  border: 1px solid rgba(82, 232, 255, 0.35);
  background: rgba(82, 232, 255, 0.1);
  color: var(--text);
  font-family: inherit;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
}

#debug-panel button.active {
  background: rgba(82, 232, 255, 0.35);
  border-color: var(--accent);
  color: #ffffff;
}

#debug-panel button:hover {
  background: rgba(82, 232, 255, 0.22);
}

#debug-panel .dbg-sliders {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

#debug-panel .dbg-row {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

#debug-panel .dbg-row label {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 11px;
}

#debug-panel .dbg-row label span:last-child {
  color: var(--accent);
}

#debug-panel input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

/* Clipboard fallback modal */
#copy-fallback {
  position: fixed;
  inset: 0;
  background: rgba(4, 6, 14, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 80;
  padding: max(20px, env(safe-area-inset-top)) max(20px, env(safe-area-inset-right)) max(20px, env(safe-area-inset-bottom)) max(20px, env(safe-area-inset-left));
}

.copy-box {
  width: min(440px, 100%);
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 16px;
}

.copy-title {
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--accent);
}

#copy-textarea {
  width: 100%;
  background: rgba(0, 0, 0, 0.45);
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  padding: 10px;
  font-family: ui-monospace, monospace;
  font-size: 13px;
  resize: none;
  user-select: text;
  -webkit-user-select: text;
}

.copy-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 12px;
}

.copy-actions button {
  min-height: 48px;
  min-width: 96px;
  padding: 0 16px;
  border-radius: 8px;
  border: 1px solid var(--panel-border);
  background: rgba(82, 232, 255, 0.16);
  color: var(--text);
  font-weight: 600;
  cursor: pointer;
}

/* Mock Ad Placeholder Overlay */
#ad-overlay {
  position: fixed;
  inset: 0;
  background: rgba(4, 6, 14, 0.94);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 90;
  padding: max(20px, env(safe-area-inset-top)) max(20px, env(safe-area-inset-right)) max(20px, env(safe-area-inset-bottom)) max(20px, env(safe-area-inset-left));
}

.ad-box {
  width: min(460px, 100%);
  background: var(--panel-bg);
  border: 2px solid #ffd166;
  border-radius: 14px;
  padding: 24px;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.75);
}

.ad-title {
  font-weight: 900;
  font-size: 18px;
  letter-spacing: 0.08em;
  color: #ffd166;
  margin-bottom: 10px;
}

.ad-desc {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.4;
  margin: 0 0 18px;
}

.ad-progress-track {
  width: 100%;
  height: 10px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 14px;
}

.ad-progress-fill {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, #52e8ff, #ffd166);
  transition: width 70ms linear;
}

.ad-countdown {
  font-family: ui-monospace, monospace;
  font-size: 14px;
  color: var(--text);
  margin-bottom: 18px;
}

.ad-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
}

.ad-actions button {
  min-height: 48px;
  min-width: 140px;
  padding: 0 18px;
  border-radius: 8px;
  border: 1px solid rgba(255, 110, 140, 0.55);
  background: rgba(255, 90, 120, 0.16);
  color: #ffd8e0;
  font-weight: 700;
  cursor: pointer;
}