/* ===== ベース（jihou.css の body flex を上書き） ===== */
body {
    display: block;
    min-height: unset;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ===== ヘッダー ===== */
.header {
    background: black;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    position: relative;
    width: 100%;
    min-height: 64px;
    padding: 12px 16px;
}

.header .title {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.header nav {
    margin-left: auto;
}

.header-image {
    height: 40px;
    width: auto;
    object-fit: contain;
}

/* ===== ページレイアウト ===== */
.page-wrapper {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
}

.game-container {
    max-width: 1024px;
    margin: 0 auto;
}

/* ===== アプリエリア ===== */
.app-container {
    position: relative;
    display: flex;
    justify-content: center;
    padding: 24px 16px;
}

/* jihou.css の position:fixed を上書きしてアプリ部分のみカバー */
#overlay {
    position: absolute;
}

/* ===== 関連アプリ ===== */
.right-column {
    width: 100%;
    flex-basis: 100%;
}

#link-list li a {
    flex-direction: row;
}

/* ===== 説明文 ===== */
.game-description > h2 {
    font-size: 1.1rem;
    font-weight: 700;
    color: #475569;
    margin-bottom: 16px;
    padding-left: 4px;
}

.game-description {
    margin: 30px auto 0;
    padding: 0 20px 20px;
    max-width: 900px;
    color: #222;
}

.game-description-inner {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.game-description article {
    background: #f5f5f5;
    border-radius: 8px;
    padding: 16px 20px;
}

.game-description h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 10px;
    border-left: 4px solid #555;
    padding-left: 8px;
}

.game-description ul {
    padding-left: 1.4em;
    line-height: 1.7;
    font-size: 1.05rem;
}

/* ===== メモ帳 ===== */
.memo-block {
    margin: 24px auto 20px;
    padding: 0 20px;
    max-width: 900px;
    color: #222;
}

.memo-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 6px;
}

.memo-header label {
    font-size: 13px;
    color: #64748b;
    letter-spacing: 1px;
}

.memo-saved-msg {
    font-size: 12px;
    color: #0e7490;
    background: #e0f2fe;
    border-radius: 999px;
    padding: 2px 10px;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.memo-saved-msg.show {
    opacity: 1;
}

#memo {
    width: 100%;
    height: 160px;
    background-color: white;
    border: 1px solid #adb5bd;
    border-radius: 6px;
    padding: 8px 10px;
    line-height: 1.6;
    font-family: inherit;
    font-size: 15px;
    resize: vertical;
    box-sizing: border-box;
}

#memo:focus {
    outline: none;
    border-color: #6b7280;
}

/* ===== Thanks ===== */
.acknowledgement {
    margin: 0 auto 30px;
    padding: 0 20px;
    max-width: 900px;
    color: #222;
}

.acknowledgement-inner {
    background: #f5f5f5;
    border-radius: 8px;
    padding: 16px 20px;
    font-size: 1.05rem;
    line-height: 1.7;
}

.acknowledgement h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 10px;
    border-left: 4px solid #555;
    padding-left: 8px;
}

/* ===== デスクトップ (1025px+) ===== */
@media (min-width: 1025px) {
    .page-wrapper {
        flex-wrap: nowrap;
    }

    .page-wrapper > main {
        flex: 1 1 auto;
        min-width: 0;
    }

    .right-column {
        flex: 0 0 280px;
        width: 280px;
        align-self: flex-start;
    }
}