body {
  font-family: "Segoe UI", "Hiragino Sans", sans-serif;
  overflow: auto;
  height: auto;
}

#settings-screen {
  background: transparent;
}

.settings-card {
  width: min(560px, 100%);
}

.settings-card h1 {
  font-size: 2.4rem;
  letter-spacing: -1px;
  margin-bottom: 36px;
}

.mode-toggle {
  width: 100%;
}

.mode-btn {
  flex: 1;
  padding: 8px 12px;
  white-space: nowrap;
}

.mode-btn:hover:not(.active) {
  filter: brightness(1.08);
}

#start-btn:hover {
  filter: brightness(1.08);
}

#game-screen {
  display: none;
  flex-direction: column;
  align-items: center;
  position: static;
  width: min(1360px, calc(100vw - 32px));
  height: auto;
  min-height: 760px;
  overflow-y: auto;
  padding: 20px 16px 32px;
}

#app {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  width: 100%;
  max-width: 760px;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.title {
  font-size: 2.6rem;
  font-weight: 700;
  color: var(--md-primary);
  letter-spacing: -1px;
}

.scores {
  display: flex;
  gap: 8px;
}

.score-box {
  background: var(--md-surface-container-high);
  border-radius: var(--md-shape-sm);
  padding: 6px 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 68px;
  box-shadow: var(--md-elev-1);
}

.score-label {
  font-size: 0.6rem;
  font-weight: 600;
  color: var(--md-on-surface-variant);
  letter-spacing: 0.08em;
}

.score-value {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--md-on-primary-container);
}

.controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 12px;
}

.hints {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.hint {
  font-size: 0.72rem;
  color: var(--md-on-surface-variant);
}

kbd {
  background: rgba(255, 240, 191, 0.92);
  border-radius: 4px;
  padding: 1px 5px;
  font-size: 0.68rem;
  font-family: monospace;
}

.controls-btns {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.btn-primary {
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  border-radius: var(--md-shape-full);
  padding: 10px 20px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: filter 0.15s;
  white-space: nowrap;
}

.btn-secondary {
  background: var(--md-secondary-container);
  color: var(--md-on-secondary-container);
  border-radius: var(--md-shape-full);
  padding: 10px 16px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: filter 0.15s;
  white-space: nowrap;
}

.btn-primary:hover,
.btn-secondary:hover {
  filter: brightness(1.08);
}

.btn-primary:active,
.btn-secondary:active {
  filter: brightness(0.94);
}

#board-container {
  position: relative;
  width: 100%;
  height: 560px;
  cursor: grab;
  border-radius: var(--md-shape-sm);
  overflow: hidden;
  user-select: none;
}

#board-container:active {
  cursor: grabbing;
}

#board-container canvas {
  display: block;
}

#hint-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hint-dir {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  transform: translate(-50%, -50%);
  background: rgba(93, 75, 29, 0.92);
  border: 1px solid rgba(255, 249, 227, 0.42);
  border-radius: var(--md-shape-sm);
  padding: 4px 10px;
  backdrop-filter: blur(6px);
  transition: opacity 0.12s;
  white-space: nowrap;
}

.hint-dir-key {
  font-size: 0.82rem;
  font-weight: 700;
  color: #fff8e4;
  line-height: 1.1;
}

.hint-dir-sub {
  font-size: 0.58rem;
  color: #ffeab6;
  line-height: 1;
}

.overlay {
  position: absolute;
  inset: 0;
  background: rgba(47, 38, 15, 0.72);
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(6px);
  z-index: 500;
}

.overlay.hidden {
  display: none;
}

.overlay-content {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

#overlay-message {
  font-size: 2rem;
  font-weight: 700;
  color: var(--md-primary);
}

@media (max-width: 480px) {
  #board-container {
    height: 360px;
  }

  .title {
    font-size: 2rem;
  }

  .settings-card {
    padding: 28px 20px;
  }

  .settings-card h1 {
    font-size: 1.9rem;
    margin-bottom: 24px;
  }

  .mode-btn {
    padding: 8px 6px;
    font-size: 0.75rem;
  }
}