:root {
  --rg-bg: #0d0d1a;
  --rg-surface: #141428;
  --rg-text: #f1f0ff;
  --rg-muted: #8b8aa8;
  --rg-accent: #f59e0b;
}

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

body.rg-app {
  font-family: 'Nunito', sans-serif;
  background: var(--rg-bg);
  color: var(--rg-text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.rg-nav {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border-bottom: 1px solid rgba(245, 158, 11, 0.25);
  background: rgba(13, 13, 26, 0.95);
  position: sticky;
  top: 0;
  z-index: 20;
}

.rg-back {
  color: #fbbf24;
  text-decoration: none;
  font-weight: 800;
  font-size: 0.85rem;
}

.rg-restart-nav {
  border: 1px solid rgba(245, 158, 11, 0.45);
  background: var(--rg-surface);
  color: #fbbf24;
  font-weight: 900;
  font-size: 1rem;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  cursor: pointer;
}

.rg-restart-fab {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 30;
  width: 48px;
  height: 48px;
  border-radius: 999px;
  border: none;
  background: linear-gradient(90deg, #f59e0b, #ec4899);
  color: #1a0a00;
  font-weight: 900;
  font-size: 1.2rem;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
}

.rg-modal {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: rgba(0, 0, 0, 0.72);
}

.rg-modal[hidden] { display: none; }

.rg-modal-card {
  background: var(--rg-surface);
  border: 2px solid rgba(245, 158, 11, 0.35);
  border-radius: 16px;
  padding: 20px;
  max-width: 340px;
  width: 100%;
  text-align: center;
}

.rg-modal-card p {
  font-weight: 800;
  line-height: 1.45;
  margin-bottom: 16px;
}

.rg-modal-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.rg-title-wrap { flex: 1; text-align: center; }
.rg-title { font-size: 1rem; font-weight: 900; }
.rg-sub { font-size: 0.72rem; color: var(--rg-muted); }

.rg-hud {
  display: flex;
  justify-content: center;
  gap: 16px;
  padding: 8px 16px;
  font-weight: 800;
  font-size: 0.9rem;
  color: #fbbf24;
}

.rg-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 12px 16px 24px;
}

.rg-canvas-wrap {
  position: relative;
  max-width: 100%;
}

.rg-canvas-wrap canvas {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  border: 3px solid var(--rg-surface);
  touch-action: none;
}

.rg-board {
  display: grid;
  gap: 2px;
  touch-action: manipulation;
}

.rg-cell {
  width: 28px;
  height: 28px;
  border: none;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 800;
  cursor: pointer;
  background: #334155;
  color: var(--rg-text);
}

.rg-cell.revealed { background: #1e293b; }
.rg-cell.mine-hit { background: #dc2626; }
.rg-cell.flagged::after { content: '🚩'; font-size: 0.65rem; }

.rg-cell.revealed:empty {
  background: #0f172a;
}

.oh-board {
  display: grid;
  gap: 4px;
  align-items: center;
  justify-content: center;
}

.oh-hint {
  font-size: 0.75rem;
  font-weight: 900;
  color: #fbbf24;
  text-align: center;
}

.oh-cell {
  width: 36px;
  height: 36px;
}

.oh-cell.oh-on {
  background: #e11d48;
}

.oh-cell.oh-mark::after {
  content: '●';
  color: #fbbf24;
  font-size: 1rem;
}

.rg-controls {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}

.rg-btn {
  border: none;
  border-radius: 10px;
  padding: 10px 14px;
  font-weight: 800;
  font-size: 0.85rem;
  cursor: pointer;
  background: var(--rg-surface);
  color: var(--rg-text);
  touch-action: manipulation;
}

.rg-btn-primary {
  background: linear-gradient(90deg, #f59e0b, #ec4899);
  color: #1a0a00;
}

.rg-hint {
  margin-top: 10px;
  font-size: 0.75rem;
  color: var(--rg-muted);
  text-align: center;
  max-width: 360px;
  line-height: 1.4;
}

.rg-guide-dual {
  margin-top: 14px;
  width: 100%;
  max-width: 520px;
  padding: 12px 14px;
  border-radius: 12px;
  background: var(--rg-surface);
  border: 1px solid rgba(245, 158, 11, 0.25);
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--rg-text);
}

.rg-guide-title {
  font-size: 0.85rem;
  font-weight: 900;
  color: #fbbf24;
  margin-bottom: 10px;
  text-align: center;
}

.rg-guide-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.rg-guide-grid h3 {
  font-size: 0.75rem;
  font-weight: 900;
  color: var(--rg-muted);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.rg-guide-grid ol {
  margin: 0;
  padding-left: 1.05rem;
}

.rg-guide-grid li { margin-bottom: 5px; }

.rg-guide-grid li:last-child { margin-bottom: 0; }

@media (max-width: 520px) {
  .rg-guide-grid { grid-template-columns: 1fr; }
}

.rg-legacy-guide-wrap {
  max-width: 520px;
  width: 100%;
  margin: 20px auto 24px;
  padding: 0 16px;
}

.rg-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.65);
  border-radius: 12px;
  font-weight: 900;
  font-size: 1.2rem;
  text-align: center;
  padding: 16px;
}

.rg-coop-keys {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 8px;
  font-size: 0.72rem;
  color: var(--rg-muted);
  max-width: 640px;
  padding: 0 16px;
}

.rg-coop-touch-ui {
  padding: 8px 16px 16px;
  max-width: 640px;
  margin: 0 auto;
}

.rg-coop-touch-ui[hidden] {
  display: none !important;
}

.rg-coop-touch-title {
  font-size: 0.75rem;
  font-weight: 800;
  color: #fbbf24;
  text-align: center;
  margin-bottom: 8px;
}

.rg-coop-paddle-zones {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  min-height: 140px;
}

.rg-coop-watch-only canvas {
  pointer-events: none;
  touch-action: none;
}

.rg-coop-canvas-wrap.rg-coop-watch-only::after {
  content: '👀 Watch here';
  display: block;
  text-align: center;
  font-size: 0.65rem;
  font-weight: 800;
  color: var(--rg-muted);
  margin-top: 4px;
}

.rg-coop-zone {
  border-radius: 12px;
  border: 2px dashed rgba(255, 255, 255, 0.2);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  touch-action: none;
  user-select: none;
  min-height: 130px;
  padding: 8px 10px;
}

.rg-coop-zone-l {
  background: rgba(52, 211, 153, 0.12);
  border-color: rgba(52, 211, 153, 0.45);
}

.rg-coop-zone-r {
  background: rgba(96, 165, 250, 0.12);
  border-color: rgba(96, 165, 250, 0.45);
}

.rg-coop-label {
  font-weight: 900;
  font-size: 0.85rem;
}

.rg-coop-hint {
  font-size: 0.7rem;
  color: var(--rg-muted);
}

.rg-coop-track {
  position: relative;
  width: 36px;
  flex: 1;
  min-height: 72px;
  max-height: 100px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.rg-coop-knob {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 28px;
  height: 28px;
  margin: -14px 0 0 -14px;
  border-radius: 999px;
  background: #fbbf24;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
  pointer-events: none;
}

.rg-coop-zone-l .rg-coop-knob {
  background: #34d399;
}

.rg-coop-zone-r .rg-coop-knob {
  background: #60a5fa;
}

.rg-coop-dpad-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.rg-dpad {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 8px;
  border-radius: 12px;
}

.rg-dpad-green {
  background: rgba(52, 211, 153, 0.1);
  border: 1px solid rgba(52, 211, 153, 0.35);
}

.rg-dpad-blue {
  background: rgba(96, 165, 250, 0.1);
  border: 1px solid rgba(96, 165, 250, 0.35);
}

.rg-dpad-mid {
  display: flex;
  gap: 28px;
}

.rg-dpad-btn {
  width: 52px;
  height: 52px;
  border: none;
  border-radius: 12px;
  background: var(--rg-surface);
  color: var(--rg-text);
  font-size: 1.2rem;
  font-weight: 900;
  cursor: pointer;
  touch-action: manipulation;
}

.rg-dpad-btn:active {
  background: rgba(251, 191, 36, 0.25);
  transform: scale(0.95);
}

@media (max-width: 480px) {
  .rg-coop-keys-desktop:not([hidden]) {
    display: none;
  }
}

@media (max-width: 480px) {
  .rg-cell { width: 24px; height: 24px; }
}

.rg-rhythm-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 0 16px;
}

.rg-rhythm-keys {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  width: min(360px, 100%);
}

.rg-rhythm-key {
  border: 2px solid rgba(251, 191, 36, 0.45);
  background: var(--rg-surface);
  color: var(--rg-text);
  font-weight: 800;
  font-size: 0.72rem;
  padding: 8px 4px;
  border-radius: 10px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.rg-note-glyph {
  font-size: 1.35rem;
  line-height: 1;
}

.rg-rhythm-key:active {
  background: rgba(251, 191, 36, 0.25);
  transform: scale(0.96);
}

.rg-paint-toolbar {
  padding: 8px 16px 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.rg-paint-stamps-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.rg-paint-label {
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--rg-muted);
}

.rg-paint-stamps {
  display: flex;
  gap: 6px;
}

.rg-paint-stamp {
  min-width: 36px;
  height: 36px;
  border-radius: 8px;
  border: 2px solid rgba(255, 255, 255, 0.12);
  background: var(--rg-surface);
  color: var(--rg-text);
  font-size: 1.1rem;
  cursor: pointer;
}

.rg-paint-stamp.active,
.rg-paint-stamp:active {
  border-color: #fbbf24;
  background: rgba(251, 191, 36, 0.15);
}

.rg-paint-swatches {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.rg-paint-swatch {
  width: 28px;
  height: 28px;
  border-radius: 999px;
  border: 2px solid transparent;
  cursor: pointer;
}

.rg-paint-swatch.active {
  border-color: #fbbf24;
  box-shadow: 0 0 0 2px rgba(251, 191, 36, 0.35);
}

.rg-paint-tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.rg-paint-size {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--rg-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.rg-paint-wrap canvas {
  background: #fff;
  cursor: crosshair;
}

.rg-btn.active {
  border-color: #fbbf24;
  color: #fbbf24;
}

.rg-c4-cols {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
  max-width: 420px;
  margin: 8px auto 16px;
  padding: 0 16px;
}

.rg-c4-col {
  min-height: 44px;
}

.rg-dg-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  padding: 8px 16px 16px;
  max-width: 420px;
  margin: 0 auto;
}

.rg-dg-opt {
  font-size: 0.75rem;
  padding: 10px 8px;
}