/* ============================================
   Game Pieces — タワーフィル専用: ピース・ストック・ドラッグ操作
   ============================================ */

/* --- Stock Area Container --- */
.stock-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
    /* 元の隙間に戻す */
    width: 600px;
    flex-shrink: 0;
}

/* --- Stock Area (Portfolio Grid) --- */
.stock-area {
    width: 100%;
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: 8px;
    padding: 16px;
    max-height: calc(100vh - 220px);
    /* 少し短くして回転ゾーンを確保 */
    overflow-y: auto;
    backdrop-filter: blur(10px);
    position: relative;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.piece-stock {
    display: grid;
    grid-template-columns: repeat(auto-fill, var(--stock-cell-size));
    grid-auto-rows: var(--stock-cell-size);
    position: relative;
    width: 100%;
    min-height: 800px;

    /* 背景グリッドを透明に（構造は維持） */
    background-image:
        linear-gradient(transparent 1px, transparent 1px),
        linear-gradient(90deg, transparent 1px, transparent 1px);
    background-size: var(--stock-cell-size) var(--stock-cell-size);
}

.stock-controls {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    width: 100%;
    margin-bottom: -8px;
    /* 隙間の分だけマイナスして、ボタンだけを下げる */
    position: relative;
    z-index: 10;
}

.stock-header {
    display: flex;
    gap: 4px;
    background: rgba(255, 255, 255, 0.9);
    padding: 4px 16px;
    border-radius: 8px 8px 0 0;
    /* 下側だけ直角に */
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
    /* 影は上方向のみ */
    border: 1px solid var(--border);
    border-bottom: none;
    /* 下の線を消して一体化 */
    margin-bottom: -2px;
    /* ピース置き場の枠線と重ねる */
    z-index: 5;
    position: relative;
    align-items: center;
    /* 中央揃え */
}

.stock-divider {
    width: 1px;
    height: 16px;
    background-color: var(--border);
    margin: 0 4px;
    opacity: 0.5;
}

.stock-action-btn {
    background: transparent;
    border: none;
    color: #00838f;
    font-size: 0.85rem;
    padding: 6px 4px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    white-space: nowrap;
}

.stock-action-btn:hover {
    color: var(--blue-neon);
    transform: translateY(-1px);
}

.stock-action-btn:active {
    transform: translateY(0);
}

/* --- Rotate Zone (Minimalist 10:88 SVG Design) --- */
.rotate-zone {
    width: 60%;
    height: 50px;
    background-color: transparent;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    cursor: pointer;
    position: relative;
    border: none;
    margin-bottom: 12px;
    /* 少し上に浮かせる */
    /* 10:88の黄金比で究極のコントラストを追求したミニマル・ループ (PCサイズ最適化) */
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='50' viewBox='0 0 300 50'%3E%3C!-- 青い矢印 (内側にオフセットして削れを防止) --%3E%3Cpolyline points='270,5 295,5 295,45 36,45' fill='none' stroke='%230288d1' stroke-width='4' stroke-linejoin='round'/%3E%3Cpath d='M42,40 L30,45 L42,50' fill='%230288d1'/%3E%3C!-- 緑の矢印 (内側にオフセットして削れを防止) --%3E%3Cpolyline points='30,45 5,45 5,5 264,5' fill='none' stroke='%2343a047' stroke-width='4' stroke-linejoin='round'/%3E%3Cpath d='M258,0 L270,5 L258,10' fill='%2343a047'/%3E%3C/svg%3E");
    background-size: 100% 100%;
}

.rotate-zone:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.rotate-hint {
    font-size: 1.1rem;
    color: var(--text-primary);
    font-weight: 800;
    letter-spacing: 2px;
}

/* 回転時のフラッシュエフェクト */
.rotate-zone.flash-active {
    background-color: rgba(2, 136, 209, 0.2) !important;
    transform: scale(1.05);
}

.piece-container {
    display: flex;
    cursor: grab;
    transition: opacity var(--transition-normal);
    pointer-events: auto;
    transform-origin: top left;
    filter: drop-shadow(0 2px 5px rgba(0, 0, 0, 0.2));
    z-index: 20;
    /* メモ(10)より上に表示 */
}

.piece-container:hover {
    filter: drop-shadow(0 4px 15px var(--green-glow-strong));
    z-index: 100;
}

.piece-container.selected-piece {
    border-color: var(--green-neon);
    box-shadow: 0 0 20px var(--green-glow);
}

.piece-container.placed-piece {
    opacity: 1.0;
    pointer-events: none;
}

.piece-container.drag-placeholder {
    opacity: 0;
    pointer-events: none;
}

.piece-grid {
    display: inline-grid;
    gap: 0;
    /* 1px gapがあると背景グリッドとズレるため0に */
}

.piece-cell {
    width: var(--stock-cell-size);
    height: var(--stock-cell-size);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 2px;
    font-family: var(--font-title);
    font-size: 0.72rem;
    /* 0.6remから20%増加 */
    color: #fff;
    /* 盤面と同じ白に統一 */
    font-weight: 700;
    transition: all var(--transition-fast);
}

.piece-cell.filled {
    border: 1px solid rgba(255, 255, 255, 0.2);
    opacity: 1.0 !important;
    /* 透かしを完全に排除 */
}

.piece-cell.blank {
    background: transparent !important;
    border: none !important;
}

/* --- Dragging --- */
.dragging-piece {
    position: fixed;
    pointer-events: none;
    z-index: 1000;
    opacity: 1.0;
    filter: drop-shadow(0 0 20px var(--green-glow));
}

.dragging-piece .piece-cell {
    width: var(--cell-size);
    height: var(--cell-size);
    font-size: 1.1rem;
}

/* --- Stock Drop Highlight --- */
.stock-preview-cell {
    position: absolute;
    width: var(--stock-cell-size);
    height: var(--stock-cell-size);
    pointer-events: none;
    z-index: 5;
    border-radius: 2px;
}

.stock-preview-cell.valid {
    background: rgba(0, 255, 65, 0.2);
    border: 1px solid var(--green-neon);
}

.stock-preview-cell.invalid {
    background: rgba(255, 82, 82, 0.2);
    border: 1px solid var(--danger);
}