/* ====== 全体レイアウト（シンプル） ====== */
body {
    font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
    margin: 20px;
}

.app {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 24px;
    align-items: start;
    max-width: 900px;
}

/* ====== タイトル ====== */
.title {
    font-weight: 800;
    font-size: 28px;
    margin-bottom: 14px;
    letter-spacing: 0.5px;
}

/* ====== 左側パネル ====== */
.panel {
    border: 1px solid #ddd;
    padding: 14px;
}

.section {
    margin-bottom: 16px;
}

.label {
    font-size: 12px;
    color: #555;
    margin-bottom: 6px;
}

/* ====== カラーピッカー ====== */
.palette {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.color-chip {
    width: 28px;
    height: 28px;
    border: 2px solid #ccc;
    cursor: pointer;
    box-sizing: border-box;
}

.color-chip.selected {
    border: 3px solid #000;
}

/* ====== 描画グリッド（8x8） ====== */
#grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 2px;
    width: min(360px, 90vw);
}

.cell {
    aspect-ratio: 1 / 1;
    /* 正方形固定 */
    background: #fff;
    border: 1px solid #e0e0e0;
    cursor: pointer;
    box-sizing: border-box;
}

/* ====== ボタン ====== */
.btns {
    display: flex;
    gap: 8px;
}

button {
    padding: 8px 10px;
    cursor: pointer;
    border: 1px solid #ccc;
    background: #fff;
}

/* ====== 右側：保存領域（1件） ====== */
.save-panel {
    border: 1px solid #ddd;
    padding: 14px;
}

#savePreview {
    border: 1px dashed #bbb;
    padding: 8px;
    min-height: 120px;
}

/* 縮小表示の8x8 */
.mini-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 1px;
    width: 160px;
}

.mini-cell {
    aspect-ratio: 1 / 1;
    border: 1px solid #eee;
    background: #fff;
    box-sizing: border-box;
}

.hint {
    font-size: 11px;
    color: #666;
    margin-top: 8px;
    line-height: 1.4;
}