:root {
    --bg: #f4f7f6; --card: #ffffff; --primary: #2c3e50; 
    --accent: #3498db; --success: #27ae60; --danger: #e74c3c;
    --border: #dcdde1; 
    
    /* カテゴリカラーの定義 */
    --cat-core: #2980b9;    /* 共通 */
    --cat-adv: #9a7d0a;     /* 専攻 */
    --cat-rel: #8e44ad;     /* 関連 */
    --cat-prac: #e67e22;    /* 演習 */
    --cat-res: #2e86c1;     /* 研究 */
    --cat-other: #7f8c8d;   /* 他専攻・他関連 */
    --cat-manual: #34495e;  /* 手動入力 */

    /* 背景用淡色 */
    --major-core: #e8f4fd; --major-adv: #fef9e7; --related: #f4ecf7;
}

body { font-family: 'Helvetica Neue', Arial, sans-serif; background: var(--bg); color: var(--primary); margin: 0; padding: 15px; }

/* --- PCレイアウト設定 --- */
.wrapper { 
    max-width: 1550px; 
    margin: 0 auto; 
    display: grid; 
    /* 左(320px)・中央(1fr)・右(300px)の3カラム */
    grid-template-columns: 320px 1fr 300px; 
    gap: 15px; 
}

/* ツール名を最上部全幅に固定 */
.main-header {
    grid-column: 1 / -1;
}

/* 使い方セクションを最下部全幅に固定 */
.full-width {
    grid-column: 1 / -1;
}

/* 各エリアの基本スタイル */
.card { background: var(--card); border-radius: 10px; padding: 15px; box-shadow: 0 4px 10px rgba(0,0,0,0.06); margin-bottom: 15px; }
h2 { font-size: 0.85rem; margin-top: 0; border-bottom: 2px solid var(--border); padding-bottom: 6px; margin-bottom: 10px; }
select, input[type="text"] { width: 100%; padding: 8px; border: 1px solid var(--border); border-radius: 5px; font-size: 0.85rem; box-sizing: border-box; }
.label-sm { font-size: 0.7rem; color: #7f8c8d; display: block; margin-bottom: 4px; font-weight: bold; }
.catalog-scroll { max-height: 50vh; overflow-y: auto; padding-right: 5px; }

/* カタログアイテム */
.item { padding: 6px 8px; border: 1px solid var(--border); border-radius: 5px; margin-bottom: 4px; font-size: 0.75rem; cursor: pointer; background: #fff; line-height: 1.2; position: relative; transition: all 0.2s; }
.item:hover { border-color: var(--accent); background: #f0f7ff; }
.item.selected { background: #f8f9fa; color: #bdc3c7; border-style: dashed; }
.item.selected::after { content: "✓"; position: absolute; right: 8px; top: 50%; transform: translateY(-50%); color: var(--success); font-weight: bold; }

.item.core { border-left: 4px solid var(--cat-core); }
.item.adv { border-left: 4px solid #f1c40f; }
.item.rel { border-left: 4px solid var(--cat-rel); }
.item.prac { border-left: 4px solid var(--cat-prac); }
.item.res { border-left: 4px solid var(--cat-res); }

/* タブ */
.tabs-container { display: flex; flex-direction: column; gap: 5px; margin-bottom: 12px; }
.tab-row { display: flex; gap: 5px; }
.tab { flex: 1; padding: 10px; text-align: center; cursor: pointer; background: #ddd; border-radius: 6px; font-weight: bold; font-size: 0.8rem; }
.tab.active { background: var(--accent); color: white; }

/* 時間割テーブル */
table { width: 100%; border-collapse: collapse; table-layout: fixed; background: #fff; }
th, td { border: 1px solid var(--border); text-align: center; height: 65px; font-size: 0.7rem; vertical-align: top; padding: 2px; }
th { background: #f8f9fa; color: #666; height: 25px; vertical-align: middle; }
.cell { cursor: pointer; overflow-y: auto; }
.cell.active-target { outline: 3px solid var(--accent); outline-offset: -3px; background: #f0f7ff; }

/* 講義タイル */
.lecture-tile { background: #f8f9fa; border: 1px solid #eee; border-radius: 3px; margin-bottom: 2px; padding: 2px; font-size: 0.65rem; text-align: left; position: relative; }
.special-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 10px; margin-top: 10px; }
.special-box { border: 2px dashed var(--border); border-radius: 8px; min-height: 50px; display: flex; flex-direction: column; align-items: center; justify-content: center; cursor: pointer; position: relative; font-size: 0.75rem; background: #fff; text-align: center; padding: 5px; }
.special-label { position: absolute; top: -8px; left: 8px; background: var(--bg); padding: 0 5px; font-size: 0.6rem; font-weight: bold; color: #95a5a6; }

.cat-tag { font-size: 0.55rem; padding: 0px 2px; border-radius: 2px; font-weight: bold; display: inline-block; margin-top: 1px; }
.tag-core { background: var(--major-core); color: var(--cat-core); }
.tag-adv { background: var(--major-adv); color: var(--cat-adv); }
.tag-rel { background: var(--related); color: var(--cat-rel); }
.tag-prac { background: #fdf2e9; color: var(--cat-prac); }
.tag-res { background: #ebf5fb; color: var(--cat-res); }
.tag-other { background: #eee; color: var(--cat-other); }
.tag-manual { background: #e5e8e8; color: var(--cat-manual); }

/* 修了要件・通知 */
.stat-row { display: flex; flex-direction: column; padding: 6px 0; border-bottom: 1px solid #f1f1f1; font-size: 0.78rem; }
.badge { font-size: 0.65rem; padding: 2px 6px; border-radius: 10px; color: white; }
.bg-ok { background: var(--success); }
.bg-no { background: #bdc3c7; }

#msg-space { font-size: 0.7rem; color: #e67e22; line-height: 1.4; }
.msg-item { margin-bottom: 5px; padding-left: 10px; position: relative; }
.msg-item::before { content: "!"; position: absolute; left: 0; font-weight: bold; }

/* ダイアログ・エディタ */
dialog { border: none; border-radius: 12px; box-shadow: 0 10px 40px rgba(0,0,0,0.3); width: 320px; padding: 20px; }
dialog::backdrop { background: rgba(0,0,0,0.5); }
#editor { display: none; position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: #fff; padding: 20px; border-radius: 12px; z-index: 1000; width: 320px; box-shadow: 0 10px 40px rgba(0,0,0,0.3); border: 2px solid var(--accent); }

/* エディタ内ボタンの改善 */
#lecture-edit-list button {
    min-width: 44px;
    min-height: 36px;
    padding: 5px 10px;
    font-size: 0.75rem;
    cursor: pointer;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: #fff;
    margin-left: 5px;
}
#lecture-edit-list button:last-child {
    color: var(--danger);
    border-color: var(--danger);
}

/* 使い方セクション */
.usage-container { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 5px; }
.usage-section h3 { font-size: 0.8rem; color: var(--accent); margin: 0 0 8px 0; display: flex; align-items: center; }
.usage-section h3::before { content: "●"; font-size: 0.6rem; margin-right: 6px; }
.usage-list { margin: 0; padding-left: 18px; font-size: 0.72rem; line-height: 1.6; color: #555; }
.usage-list li { margin-bottom: 4px; }

/* --- スマホ・タブレット対応 (Responsive) --- */
@media (max-width: 1024px) {
    .wrapper {
        display: flex; /* PCのグリッドを解除し、順序制御を可能にする */
        flex-direction: column;
        padding: 10px;
    }

    /* 要求に基づきツール名を常に最上部へ(order: 1) */
    .main-header { order: 1; margin-bottom: 10px; }
    
    /* 順序：所属・カタログ(2) -> データ・通知(3) -> 時間割(4) -> 使い方(5) */
    .wrapper > aside:nth-of-type(1) { order: 2; } 
    .wrapper > aside:nth-of-type(2) { order: 3; }
    .wrapper > main { order: 4; }
    .full-width { order: 5; }

    .card:has(table) {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    table { min-width: 600px; }
    .special-grid { grid-template-columns: 1fr 1fr; }
    .usage-container { grid-template-columns: 1fr; }
    #editor, dialog { width: 90%; max-width: none; }
    
    /* モバイル操作性の強化 */
    select, input[type="text"], #editor button {
        min-height: 44px;
    }
    #lecture-edit-list button {
        min-width: 60px;
        min-height: 44px;
        font-size: 0.85rem;
    }
}