/* ========================================
   カード共通スタイル
   ======================================== */
.card {
  background-color: var(--color-bg-lighter);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all 0.3s ease;
  cursor: pointer;
  position: relative;
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

/* キャラクター別カラーボーダー */
.card-red {
  border-top: 4px solid var(--color-red);
}

.card-green {
  border-top: 4px solid var(--color-green);
}

.card-blue {
  border-top: 4px solid var(--color-blue);
}

.card-purple {
  border-top: 4px solid var(--color-purple);
}

/* カードタイプ別背景グラデーション */
.card-attack {
  background: linear-gradient(to bottom, rgba(196, 30, 58, 0.1) 0%, var(--color-bg-lighter) 50%);
}

.card-skill {
  background: linear-gradient(to bottom, rgba(45, 139, 87, 0.1) 0%, var(--color-bg-lighter) 50%);
}

.card-power {
  background: linear-gradient(to bottom, rgba(147, 112, 219, 0.1) 0%, var(--color-bg-lighter) 50%);
}

/* ========================================
   カードコスト表示
   ======================================== */
.card-cost {
  position: absolute;
  top: 8px;
  left: 8px;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, #2196f3 0%, #1565c0 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 700;
  color: white;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
  z-index: 2;
}

/* X コスト */
.card-cost[data-cost="X"] {
  background: linear-gradient(135deg, #9c27b0 0%, #6a1b9a 100%);
}

/* 0 コスト */
.card[data-cost="0"] .card-cost {
  background: linear-gradient(135deg, #4caf50 0%, #2e7d32 100%);
}

/* ========================================
   レアリティ表示
   ======================================== */
.card-rarity {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  z-index: 2;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.card-rarity.basic {
  background-color: var(--color-basic);
  color: white;
}

.card-rarity.common {
  background-color: rgba(255, 255, 255, 0.2);
  color: var(--color-common);
  border: 1px solid var(--color-common);
}

.card-rarity.uncommon {
  background-color: rgba(79, 195, 247, 0.2);
  color: var(--color-uncommon);
  border: 1px solid var(--color-uncommon);
}

.card-rarity.rare {
  background: linear-gradient(135deg, #ffd700 0%, #ff8c00 100%);
  color: #000;
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.8; }
}

/* ========================================
   カード画像エリア
   ======================================== */
.card-image {
  width: 100%;
  height: 140px;
  background-color: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 0.3s ease;
  opacity: 0;
}

.card-img[src] {
  opacity: 1;
}

/* 画像読み込み中のプレースホルダー */
.card-img:not([src])::before {
  content: '🎴';
  position: absolute;
  font-size: 3rem;
  opacity: 0.4;
}

/* 画像読み込みエラー時 */
.card-img[src=""]:after,
.card-img[alt]:after {
  content: attr(alt);
  position: absolute;
  font-size: 0.7rem;
  color: var(--color-text-dim);
  text-align: center;
  padding: var(--spacing-sm);
}

/* ========================================
   カードコンテンツ
   ======================================== */
.card-content {
  padding: var(--spacing-md);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-name {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text);
  line-height: 1.3;
}

.card-description {
  font-size: 0.8rem;
  color: var(--color-text-dim);
  line-height: 1.4;
  flex: 1;
}

/* カード説明内のキーワードハイライト */
.card-description .keyword {
  color: var(--color-primary);
  font-weight: 600;
}

/* カード説明内の数値ハイライト */
.card-description .card-value {
  color: #ffd700;
  font-weight: 700;
  text-shadow: 0 0 4px rgba(255, 215, 0, 0.5);
}

/* ========================================
   アップグレードトグルボタン
   ======================================== */
.card-upgrade-toggle {
  position: absolute;
  top: 8px;
  left: 50px;
  padding: 4px 8px;
  background: rgba(0, 0, 0, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-sm);
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.card-upgrade-toggle span::after {
  content: ' ↑';
  opacity: 0.7;
}

.card-upgrade-toggle:hover {
  background: rgba(33, 150, 243, 0.9);
  transform: translateY(-2px);
  border-color: var(--color-primary);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

.card.upgraded .card-upgrade-toggle {
  background: var(--color-success);
  border-color: var(--color-success);
}

.card.upgraded .card-upgrade-toggle span::after {
  content: ' ✓';
  opacity: 1;
}

/* ========================================
   カード追加ボタン
   ======================================== */
.card-add-buttons {
  display: flex;
  gap: 4px;
  width: 100%;
}

.card-add-btn {
  flex: 1;
  padding: var(--spacing-sm);
  color: white;
  font-size: 0.8rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.card-add-normal {
  background-color: var(--color-success);
}

.card-add-normal:hover {
  background-color: #388e3c;
}

.card-add-normal:active {
  background-color: #2e7d32;
}

.card-add-upgraded {
  background: linear-gradient(135deg, #ffd700 0%, #ff8c00 100%);
}

.card-add-upgraded:hover {
  background: linear-gradient(135deg, #ffed4e 0%, #ffa726 100%);
}

.card-add-upgraded:active {
  background: linear-gradient(135deg, #ffb300 0%, #f57c00 100%);
}

/* ========================================
   手札カード（シミュレーター用）
   ======================================== */
.hand-card {
  min-width: 140px;
  max-width: 160px;
  background-color: var(--color-bg-lighter);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.hand-card:hover {
  transform: translateY(-12px) scale(1.05);
  box-shadow: var(--shadow-lg);
  z-index: 10;
}

.hand-card:active {
  transform: translateY(-8px) scale(1.02);
}

/* プレイ不可能なカード（エネルギー不足） */
.hand-card.unplayable {
  opacity: 0.5;
  cursor: not-allowed;
}

.hand-card.unplayable:hover {
  transform: none;
}

.hand-card-cost {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, #2196f3 0%, #1565c0 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  color: white;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
  margin: 0 auto;
}

.hand-card-name {
  font-size: 0.95rem;
  font-weight: 600;
  text-align: center;
  color: var(--color-text);
}

.hand-card-description {
  font-size: 0.75rem;
  color: var(--color-text-dim);
  text-align: center;
  line-height: 1.3;
}

/* 手札カードのキャラクター別ボーダー */
.hand-card.card-red {
  border: 2px solid var(--color-red);
}

.hand-card.card-green {
  border: 2px solid var(--color-green);
}

.hand-card.card-blue {
  border: 2px solid var(--color-blue);
}

.hand-card.card-purple {
  border: 2px solid var(--color-purple);
}

/* ========================================
   アップグレード表示
   ======================================== */
.card.upgraded {
  border: 2px solid var(--color-success);
  box-shadow: 0 0 12px rgba(76, 175, 80, 0.5);
}

.card.upgraded .card-name {
  color: var(--color-success);
}

.deck-card.upgraded::before {
  content: '+';
  position: absolute;
  top: 50%;
  right: 8px;
  transform: translateY(-50%);
  width: 24px;
  height: 24px;
  background-color: var(--color-success);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

/* ========================================
   カードステータス効果
   ======================================== */
.card.exhausted {
  opacity: 0.3;
  filter: grayscale(100%);
  cursor: not-allowed;
}

.card.selected {
  border: 3px solid var(--color-warning);
  box-shadow: 0 0 20px rgba(255, 152, 0, 0.5);
}

/* ========================================
   カードアニメーション
   ======================================== */
@keyframes card-draw {
  from {
    opacity: 0;
    transform: translateY(100px) scale(0.5);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes card-play {
  0% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px) scale(1.1);
  }
  100% {
    opacity: 0;
    transform: translateY(-100px) scale(0.5);
  }
}

.card.drawing {
  animation: card-draw 0.5s ease-out;
}

.card.playing {
  animation: card-play 0.6s ease-in-out;
}

/* ========================================
   カードホバー効果の詳細情報
   ======================================== */
.card-tooltip {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-bg-light);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-lg);
  z-index: 100;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  margin-top: var(--spacing-xs);
}

.card:hover .card-tooltip {
  opacity: 1;
}

.card-tooltip::before {
  content: '';
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 8px solid transparent;
  border-bottom-color: var(--color-border);
}

/* ========================================
   レスポンシブ調整
   ======================================== */
@media (max-width: 600px) {
  .card {
    min-width: 100px;
  }

  .card-image {
    height: 80px;
  }

  .card-image-placeholder {
    font-size: 2rem;
  }

  .card-cost {
    width: 28px;
    height: 28px;
    font-size: 1rem;
  }

  .card-name {
    font-size: 0.85rem;
  }

  .card-description {
    font-size: 0.75rem;
  }

  .hand-card {
    min-width: 100px;
    max-width: 120px;
    padding: var(--spacing-sm);
  }

  .hand-card-cost {
    width: 28px;
    height: 28px;
    font-size: 1rem;
  }

  .hand-card-name {
    font-size: 0.85rem;
  }

  .hand-card-description {
    font-size: 0.7rem;
  }
}