.Chess {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  min-height: 100vh;
  padding: 16px;
  background: #3E2723;
  color: #D7CCC8;
  font-family: Georgia, serif;
  user-select: none;
}
.Chess[data-screen=menu] .Chess-Play {
  display: none;
}
.Chess[data-screen=playing] .Chess-Menu {
  display: none;
}
.Chess-Menu {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.Chess-Menu[data-menu-page=mode] [data-page=difficulty] {
  display: none;
}
.Chess-Menu[data-menu-page=difficulty] [data-page=mode] {
  display: none;
}
.Chess-MenuPage {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.Chess-MenuTitle {
  margin-bottom: 4px;
  color: rgba(215, 204, 200, 0.6);
  font-size: 13px;
  letter-spacing: 2px;
}
.Chess-MenuButton {
  width: 100%;
  max-width: 280px;
  padding: 12px 24px;
  border: 1px solid #8D6E63;
  border-radius: 6px;
  background: #5D4037;
  color: #D7CCC8;
  font-family: Georgia, serif;
  font-size: 15px;
  letter-spacing: 1px;
  text-align: center;
  cursor: pointer;
  transition: background 0.2s;
}
.Chess-MenuButton:hover {
  background: #6D4C41;
}
.Chess-MenuButton[data-variant=level] {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 20px;
}
.Chess-MenuButton[data-variant=back] {
  margin-top: 8px;
  background: transparent;
  font-size: 13px;
}
.Chess-MenuButton-Name {
  font-weight: bold;
}
.Chess-MenuButton-Detail {
  color: rgba(215, 204, 200, 0.6);
  font-size: 13px;
}
.Chess-Play {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  width: 100%;
  max-width: 560px;
}
.Chess-Status {
  min-height: 22px;
  color: #D7CCC8;
  font-size: 15px;
  font-weight: bold;
  letter-spacing: 1px;
  text-align: center;
}
.Chess-Status[data-state=over] {
  color: #FFD54F;
}
.Chess-Status[data-state=check] {
  color: #EF9A9A;
}
.Chess-Status[data-state=thinking] {
  color: #A5D6A7;
}
.Chess-StatusLevel {
  margin-left: 8px;
  opacity: 0.5;
  font-size: 12px;
}
.Chess-Capture {
  display: flex;
  align-items: center;
}
.Chess-CaptureCanvas {
  display: block;
  flex-shrink: 0;
}
.Chess-CaptureAdvantage {
  margin-left: 4px;
  color: #A5D6A7;
  font-size: 12px;
  font-weight: bold;
  flex-shrink: 0;
}
.Chess-Board {
  display: block;
  border-radius: 4px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
  cursor: pointer;
  touch-action: none;
}
.Chess-Controls {
  display: flex;
  gap: 10px;
  margin-top: 4px;
}
.Chess-Button {
  padding: 7px 20px;
  border: 1px solid #8D6E63;
  border-radius: 6px;
  background: #5D4037;
  color: #D7CCC8;
  font-family: Georgia, serif;
  font-size: 13px;
  letter-spacing: 1px;
  cursor: pointer;
  transition: background 0.2s;
}
.Chess-Button:hover {
  background: #6D4C41;
}
.Chess-Button[data-variant=menu] {
  background: transparent;
}
.Chess-Button[data-variant=menu]:hover {
  background: rgba(255, 255, 255, 0.06);
}