html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  box-sizing: border-box;
}

body {
  font-family: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
  height: 100dvh;
  width: 100vw;
  background-color: #f5f5f7;
  color: #333;
  overflow: hidden;
}

*, *::before, *::after {
  box-sizing: inherit;
}


#headerArea {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 10px 0;
}

#titleText {
  margin: 0;
  font-size:clamp(1.1rem, 4vw, 1.4rem);
}

.headerBtn {
  position: absolute;
  right: 5%;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  gap: 5px;
}

button {
  border-radius: 10px;
  border: 1px solid #ccc;
  background-color: #fff;
  font-size: 12px;
  font-weight: bold;
  color: #555;
  cursor: pointer;
  pointer-events: auto;
}
button:hover {
  background-color: #eee;
}
button:disabled {
  opacity: 0;
  cursor: not-allowed;
  pointer-events: none;
}


/* メインレイアウト */
#mainArea {
  width: 80%;
  height: 75dvh;
  margin: 0 auto;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
  text-align: center;
  position: relative;
  margin-top: 10px;
}

#actionArea {
  position: relative;
  height: 100%;
  width: 100%;
}


.card-container {
  min-height: 110px;
  border-radius: 8px;
  background: #fff;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
}

#fieldArea {
  position: relative;
  height: 100%;
  box-sizing: border-box;
  border: 1px solid #aaa;
  background-color: #fff;
}


/* action上のオーバーレイ */
.mainOverlay {
  width: 100%;
  z-index: 10;
  padding: 6px 10px 8px 10px;
  border-radius: 8px;
  box-sizing: border-box;
  pointer-events: none;
}

#ueno {
  position: absolute;
  top: 0;
  left: 0;
}

#shitano {
  position: absolute;
  bottom: 0;
  left: 0;
}

/* 上の */
#gameValue {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  margin-top: 1%;
}

#score {
  justify-self: start;
  margin: 0;
  white-space: nowrap;
  font-size: 0.88rem;
  font-weight: bold;
}

#center {
  justify-self: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  white-space: nowrap;
}

#gameTimer {
  justify-self: end;
  margin: 0;
  white-space: nowrap;
  font-size: 0.88rem;
  font-weight: bold;
}

#targetDisplay {
  font-size: 1.3rem;
  font-weight: bold;
  color: #d9534f;
  line-height: 1.1;
}

#currentSum {
  font-size: 0.85rem;
  font-weight: bold;
  color: #333;
}


/* 横幅が狭い場合のレイアウト */
@media screen and (max-width: 600px) {
  #gameValue {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
  }

  #score {
    order: 1;
  }

  #gameTimer {
    order: 2;
  }

  #center {
    order: 3;
    width: 100%;
    margin-top: 4px;
  }

  #targetDisplay {
    font-size: 1.2rem;
  }
}



/* 下の */
.mainBtn {
  display: flex;
  justify-content: center;
  gap: 5px;
  margin: 5px 0;
}

#prepareArea {
  border: 1px solid #ddd;
  border-radius: 8px;
  background-color: #fafafa;
  pointer-events: auto;
}

#prepareHeader {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4px 10px;
  gap: 5px;
  background-color: #f0f0f0;
  user-select: none;
}

#tefuda {
  margin: 0;
  color: #333;
  font-size: 0.95rem;
  pointer-events: none;
}

#toggleHandBtn {
  padding: 2px 8px;
  font-size: 0.75rem;
  line-height: 1;
  background: #fff;
  border: 1px solid #bbb;
  border-radius: 4px;
}

#handAreaWrapper {
  max-height: 200px;
  transition: max-height 0.1s ease-in-out, opacity 0.2s ease;
  opacity: 1;
}

#prepareArea.closed #handAreaWrapper {
  max-height: 0;
  opacity: 0;
}

#handArea {
  border-top: 1px solid #bbb;
  height: 100%;
  padding: 6px;
  background-color: #fff;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
}


/* カードの見た目 */
.card {
  width: 75px;
  height: 50px;
  background: #fff;
  border: 2px solid #333;
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  cursor: grab;
  user-select: none;
  transition: transform 0.1s;
  box-sizing: border-box;
  touch-action: none;
}

.card:hover:not(.disabled) {
  transform: translateY(-2px);
}

.card:active:not(.disabled) {
  cursor: grabbing;
}

/* 手札で使用済みカード */
.card.disabled {
  opacity: 0.35;
  cursor: not-allowed;
  filter: grayscale(80%);
  pointer-events: none;
  transform: none;
  box-shadow: none;
}

#fieldArea .card {
  position: absolute;
  margin: 0;
  cursor: grab;
}


.card .era-name {
  font-size: 1rem;
  font-weight: bold;
  line-height: 1.1;
  pointer-events: none;
}

.card .era-year {
  font-size: 0.8rem;
  color: #666;
  margin-top: 4px;
  pointer-events: none;
}





/* モーダル */
#modalOverlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.25);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

#modalContent {
    background-color: white;
    padding: 20px;
    width: 75%;
    max-width: 600px;
    max-height: 75%;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    position: relative;
    display: flex;
    flex-direction: column;
}

#modalOverlay.active {
    display: flex;
}

#modalTitle{
    align-self: center;
    line-height: 1.2;
}

#modalBody {
    flex: 1;
    overflow-y: auto;
    margin-bottom: 10px;
    padding-right: 10px;
    border-bottom: 1px solid #eee;
    padding-top: 10px;
    padding-bottom: 10px;
}

#closeModalBtn {
    align-self: center;
    padding: 8px 24px;
    cursor: pointer;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    flex-shrink: 0;
}

/* 元号一覧 */
.eraInputWrap {
  margin: 15px 0;
  text-align: center;
}

#inputYYYYMMDD {
  padding: 6px;
  font-size: 1rem;
  width: 100px;
  border: 1px solid #ccc;
  border-radius: 4px;
}

.listGrid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 8px;
  margin-top: 10px;
}

.listItem {
  border: 1px solid #ccc;
  padding: 4px;
  border-radius: 6px;
  text-align: center;
  background: #fafafa;
}