/**
 * style.css - サイネージ表示用メインスタイル
 *
 * 目次:
 * 1. CSSカスタムプロパティ
 * 2. リセット・ベース
 * 3. メインレイアウト
 * 4. ヘッダー
 * 5. コンテンツグリッド
 * 6. カード共通
 * 7. スケジュールセクション
 * 8. 連絡セクション
 * 9. 提出物セクション
 * 10. フッター
 * 11. 広告エリア
 * 12. 更新通知バナー
 * 13. 起動画面
 * 14. 音声ステータス
 * 15. 自動スクロール
 * 16. レスポンシブ（タブレット）
 * 17. レスポンシブ（スマホ）
 * 18. レスポンシブ（ランドスケープ）
 * 19. 大画面モニター対応
 */

/* =====================
   1. CSSカスタムプロパティ
   ===================== */
:root {
    --bg-color: #f0f2f5;
    --primary-color: #2c3e50;
    --accent-color: #3498db;
    --urgent-color: #e74c3c;
    --text-color: #333;
    --text-muted: #999;
    --border-color: #eee;
    --font-base: "Noto Sans JP", "Helvetica Neue", Arial, sans-serif;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --radius-sm: 8px;
    --radius-md: 12px;
    --content-gap: 10px;
    
    /* 大画面スケーリング用 */
    --scale-factor: 1;
    --base-font-size: 16px;
}

/* =====================
   リセット・ベース
   ===================== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* スクロールバー非表示（サイネージ用） */
::-webkit-scrollbar {
    display: none;
}

* {
    -ms-overflow-style: none;
    scrollbar-width: none;
}

html, body {
    font-family: var(--font-base);
    background-color: var(--bg-color);
    color: var(--text-color);
    width: 100%;
    height: 100%;
    overflow: hidden;
    /* 画面サイズに応じてベースフォントサイズをスケール */
    font-size: calc(var(--base-font-size) * var(--scale-factor));
}

/* =====================
   メインレイアウト（デフォルト - 横長画面用）
   縦長画面は下部のメディアクエリでオーバーライド
   ===================== */
.container {
    display: grid;
    grid-template-columns: 68fr 32fr;
    grid-template-areas: "info ad";
    width: 100%;
    height: 100vh;
    max-height: 100vh;
    overflow: hidden;
    background-color: var(--bg-color);
}

.info-area {
    grid-area: info;
    padding: 1vmin;
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-height: 100vh;
    overflow: hidden;
    background-color: var(--bg-color);
}

/* =====================
   広告エリア上部のヘッダー
   ===================== */
.ad-header {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 6px 10px;
    background: rgba(0, 0, 0, 0.5);
    color: white;
    z-index: 20;
    backdrop-filter: blur(5px);
}

.date-text {
    font-size: clamp(0.7rem, 1vw, 0.9rem);
    font-weight: 600;
}

.day-badge {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.1em 0.3em;
    border-radius: 3px;
    font-size: clamp(0.6rem, 0.9vw, 0.8rem);
}

.time-text {
    font-size: clamp(0.7rem, 1vw, 0.9rem);
    font-weight: 500;
    margin-left: 0.3rem;
    padding-left: 0.5rem;
    border-left: 1px solid rgba(255, 255, 255, 0.4);
    font-family: "Roboto", monospace;
}

.class-title {
    font-size: clamp(0.7rem, 1vw, 0.9rem);
    font-weight: 600;
    margin-left: 0.3rem;
    padding-left: 0.5rem;
    border-left: 1px solid rgba(255, 255, 255, 0.4);
}

/* =====================
   コンテンツグリッド
   サイネージモード: 予定を最優先、他は残りスペースに収める
   ===================== */
.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto 1fr;
    gap: var(--content-gap);
    flex: 1;
    min-height: 0;
    margin-top: calc(var(--content-gap) * 0.5);
    overflow: hidden;
}

/* =====================
   カード共通
   ===================== */
.card {
    background: white;
    border-radius: var(--radius-md);
    padding: 0.8vmin 1.2vmin;
    box-shadow: var(--shadow-sm);
    border-top: 3px solid var(--accent-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-height: 0;
}

.card h2 {
    font-size: clamp(0.75rem, 1.2vw, 1rem);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.2rem;
    margin-bottom: 0.3rem;
    flex-shrink: 0;
    font-weight: 700;
    color: var(--primary-color);
}

.card h2 .icon {
    margin-right: 0.3rem;
    font-size: 0.9em;
}

/* =====================
   スケジュールセクション
   サイネージモード: 予定を最優先、内容に応じて高さを確保
   ===================== */
.schedule-section {
    grid-column: 1 / -1;
    min-height: auto;
    max-height: 60vh;
}

.schedule-grid-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1vmin;
    flex: 1;
    min-height: 120px;
    overflow: visible;
}

.schedule-day-column {
    background-color: #f8f9fa;
    border-radius: var(--radius-sm);
    padding: 0.8vmin;
    border: 1px solid #e9ecef;
    display: flex;
    flex-direction: column;
    overflow: visible;
    min-height: 100px;
}

.schedule-date-header {
    text-align: center;
    font-weight: 700;
    border-bottom: 2px solid var(--accent-color);
    margin-bottom: 0.3rem;
    font-size: clamp(1rem, 1.6vw, 1.4rem);
    padding: 0.25rem;
    flex-shrink: 0;
    color: var(--primary-color);
}

.is-today .schedule-date-header {
    background-color: var(--accent-color);
    color: white;
    border-radius: 4px;
}

.schedule-scroll-area {
    flex: 1;
    overflow: visible;
    min-height: 80px;  /* 3行分の最小高さを確保 */
}

.schedule-list-item {
    font-size: clamp(0.95rem, 1.5vw, 1.4rem);
    padding: 0.4rem 0;
    border-bottom: 1px dotted #ccc;
    line-height: 1.4;
}

.schedule-time {
    display: block;
    font-size: 0.75em;
    color: var(--accent-color);
    font-weight: 700;
}

.schedule-content {
    display: block;
    font-weight: 600;
}

.no-schedule {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    padding: 10px;
    min-height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 空欄プレースホルダー（3行分確保用） */
.schedule-placeholder {
    visibility: hidden;
    border-bottom: 1px dotted transparent !important;
}

/* =====================
   連絡セクション
   ===================== */
.notice-section {
    border-top-color: #27ae60;
}

.list-group {
    list-style-type: disc;
    padding-left: 1.5rem;
    flex: 1;
    min-height: 0;
    max-height: 100%;
    overflow-y: auto;
    overflow-x: hidden;
}

.list-group li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
    font-size: clamp(1rem, 1.6vw, 1.5rem);
    line-height: 1.4;
    font-weight: 600;
}

.no-notice {
    color: var(--text-muted);
    list-style: none;
}

/* 重要ハイライト */
.highlight {
    color: var(--urgent-color);
    font-weight: bold;
    background-color: #fff5f5;
    border-left: 4px solid var(--urgent-color);
    padding-left: 10px !important;
    margin-left: -1.5rem;
    list-style: none;
    animation: flash 2s infinite;
}

@keyframes flash {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* =====================
   提出物セクション
   ===================== */
.assignment-section {
    border-top-color: var(--urgent-color);
}

.table-wrapper {
    flex: 1;
    min-height: 0;
    max-height: 100%;
    overflow-y: auto;
    overflow-x: hidden;
}

.task-table {
    width: 100%;
    border-collapse: collapse;
}

.task-table th {
    background: #f8f9fa;
    padding: 0.4rem;
    text-align: left;
    font-size: clamp(0.8rem, 1.2vw, 1rem);
    position: sticky;
    top: 0;
    z-index: 1;
    font-weight: 600;
    color: var(--text-muted);
}

.task-table td {
    padding: 0.5rem;
    border-bottom: 1px solid var(--border-color);
    font-size: clamp(0.95rem, 1.5vw, 1.4rem);
    font-weight: 600;
}

.no-assignment {
    text-align: center;
    color: var(--text-muted);
}

.days-left {
    font-weight: bold;
    color: var(--accent-color);
}

.days-urgent {
    color: var(--urgent-color);
    font-weight: bold;
}

/* 期限切れの行 */
.overdue-row {
    background-color: rgba(231, 76, 60, 0.1);
}

.overdue-row td {
    opacity: 0.8;
}

/* =====================
   フッター
   ===================== */
.branding {
    text-align: right;
    font-size: 0.8rem;
    color: #888;
    font-weight: bold;
    padding-top: 0.5rem;
    flex-shrink: 0;
}

/* =====================
   広告エリア
   ===================== */
.ad-area {
    grid-area: ad;
    background: linear-gradient(-45deg, #141E30, #243B55, #2c3e50, #4ca1af);
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    overflow: hidden;
    position: relative;
    height: 100vh;
    max-height: 100vh;
    min-height: 100%;
}

@keyframes gradientBG {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.ad-area::after {
    content: "Edix Signage";
    position: absolute;
    color: rgba(255, 255, 255, 0.1);
    font-size: clamp(1.5rem, 4vw, 3rem);
    font-weight: bold;
    font-family: sans-serif;
    z-index: 0;
    pointer-events: none;
    letter-spacing: 0.1em;
}

.ad-container {
    width: 100%;
    flex: 1;
    position: relative;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 10px;
}

.ad-area img {
    max-width: 100%;
    max-height: 100vh;
    width: auto;
    height: auto;
    object-fit: contain;
    position: relative;
    z-index: 11;
}

.ad-area img[src=""],
.ad-area img:not([src]) {
    display: none;
}

/* 授業時間モード（広告非表示） */
.ad-area.quiet-mode::after {
    content: "📚 授業中";
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    color: rgba(255, 255, 255, 0.5);
}

.ad-area.quiet-mode img {
    display: none !important;
}

/* =====================
   カレンダーボタン
   ===================== */
.calendar-toggle-btn {
    float: right;
    background: linear-gradient(135deg, var(--accent-color), #2980b9);
    border: none;
    border-radius: 6px;
    padding: 0.2rem 0.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.calendar-toggle-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 3px 8px rgba(0,0,0,0.2);
}

.calendar-toggle-btn:active {
    transform: scale(0.98);
}

.calendar-toggle-btn .calendar-icon {
    font-size: 0.9em;
}

/* =====================
   カレンダーモーダル
   ===================== */
.calendar-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    z-index: 10001;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease;
}

.calendar-modal.show {
    display: flex;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.calendar-modal-content {
    background: white;
    border-radius: 16px;
    width: 90%;
    max-width: 450px;
    max-height: 85vh;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.calendar-modal-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 1rem;
    background: linear-gradient(135deg, var(--accent-color), #2980b9);
    color: white;
    position: relative;
}

.calendar-modal-header h3 {
    margin: 0;
    font-size: 1.2rem;
    font-weight: 600;
}

.calendar-nav-btn {
    background: rgba(255,255,255,0.2);
    border: none;
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.2s;
}

.calendar-nav-btn:hover {
    background: rgba(255,255,255,0.3);
}

.calendar-close-btn {
    position: absolute;
    right: 0.8rem;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,0.2);
    border: none;
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.3rem;
    line-height: 1;
    transition: all 0.2s;
}

.calendar-close-btn:hover {
    background: rgba(255,255,255,0.3);
}

.calendar-grid {
    padding: 1rem;
}

.calendar-weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    text-align: center;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.calendar-weekdays span:first-child {
    color: #e74c3c;
}

.calendar-weekdays span:last-child {
    color: #3498db;
}

.calendar-days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
}

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.9rem;
    position: relative;
}

.calendar-day:hover {
    background: #f0f0f0;
}

.calendar-day.other-month {
    color: #ccc;
}

.calendar-day.today {
    background: var(--accent-color);
    color: white;
    font-weight: bold;
}

.calendar-day.selected {
    background: #2c3e50;
    color: white;
}

.calendar-day.has-schedule::after {
    content: '';
    position: absolute;
    bottom: 4px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #27ae60;
}

.calendar-day.today.has-schedule::after,
.calendar-day.selected.has-schedule::after {
    background: white;
}

.calendar-day.sunday {
    color: #e74c3c;
}

.calendar-day.saturday {
    color: #3498db;
}

.calendar-day.other-month.sunday,
.calendar-day.other-month.saturday {
    opacity: 0.5;
}

.calendar-schedule-detail {
    padding: 1rem;
    background: #f8f9fa;
    border-top: 1px solid #eee;
    max-height: 200px;
    overflow-y: auto;
}

.calendar-detail-placeholder {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    padding: 1rem 0;
}

.calendar-detail-date {
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.calendar-detail-item {
    display: flex;
    gap: 0.5rem;
    padding: 0.4rem 0;
    border-bottom: 1px dotted #ddd;
    font-size: 0.9rem;
}

.calendar-detail-item:last-child {
    border-bottom: none;
}

.calendar-detail-time {
    color: var(--accent-color);
    font-weight: 600;
    min-width: 60px;
}

.calendar-detail-content {
    flex: 1;
}

.calendar-no-schedule {
    text-align: center;
    color: var(--text-muted);
    padding: 0.5rem 0;
}

/* =====================
   更新通知バナー
   ===================== */
#update-banner {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(-100px);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 12px 25px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: bold;
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.4);
    z-index: 9999;
    opacity: 0;
    transition: transform 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55), 
                opacity 0.3s ease;
    pointer-events: none;
}

#update-banner.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
    animation: pulse-banner 1.5s ease-in-out infinite;
}

@keyframes pulse-banner {
    0%, 100% { box-shadow: 0 4px 20px rgba(102, 126, 234, 0.4); }
    50% { box-shadow: 0 4px 30px rgba(102, 126, 234, 0.7); }
}

/* =====================
   起動画面
   ===================== */
#startup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    cursor: pointer;
    transition: opacity 0.5s ease;
}

#startup-overlay.fade-out {
    opacity: 0;
    pointer-events: none;
}

.startup-content {
    text-align: center;
    color: white;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.startup-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    animation: pulse-icon 2s ease-in-out infinite;
}

@keyframes pulse-icon {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.startup-content h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(90deg, #667eea, #764ba2, #f093fb);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.startup-content p {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    opacity: 0.9;
}

.startup-hint {
    font-size: 0.9rem;
    opacity: 0.6;
    margin-top: 1rem;
}

.startup-countdown {
    font-size: 3rem;
    font-weight: bold;
    margin: 1rem 0;
    background: linear-gradient(90deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.startup-content::after {
    content: '';
    display: block;
    width: 50px;
    height: 50px;
    margin: 1.5rem auto 0;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    animation: tap-ring 2s ease-out infinite;
}

@keyframes tap-ring {
    0% { transform: scale(0.8); opacity: 1; }
    100% { transform: scale(1.5); opacity: 0; }
}

/* =====================
   音声ステータス
   ===================== */
#audio-status {
    position: fixed;
    bottom: 10px;
    right: 10px;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    z-index: 9999;
    cursor: pointer;
    transition: all 0.3s;
}

/* =====================
   自動スクロール一時停止インジケーター
   ===================== */
.scroll-paused-indicator {
    position: absolute;
    top: 5px;
    right: 5px;
    background: rgba(0,0,0,0.5);
    color: white;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 10px;
    opacity: 0;
    transition: opacity 0.3s;
}

.scroll-paused .scroll-paused-indicator {
    opacity: 1;
}

/* =====================
   サイネージモード（大きめタブレット以上: 幅900px-1024px）
   ===================== */
@media (min-width: 900px) and (max-width: 1024px) {
    html, body {
        overflow: hidden;
        height: 100vh;
        max-height: 100vh;
        background-color: var(--bg-color);
    }

    .info-area {
        height: 100vh;
        max-height: 100vh;
        background-color: var(--bg-color);
    }

    .ad-area {
        height: 100vh;
        max-height: 100vh;
    }

    .ad-header {
        padding: 5px 10px;
        gap: 0.4rem;
    }

    .date-text {
        font-size: 0.65rem;
    }

    .day-badge {
        font-size: 0.55rem;
    }

    .time-text {
        font-size: 0.65rem;
    }

    .class-title {
        font-size: 0.65rem;
    }

    .content-grid {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: minmax(0, 35fr) minmax(0, 65fr);
        flex: 1;
        overflow: hidden;
    }

    .card h2 {
        font-size: 0.7rem;
    }

    .schedule-list-item {
        font-size: 1rem;
    }

    .list-group li {
        font-size: 1rem;
    }

    .task-table td {
        font-size: 0.9rem;
    }
}

/* =====================
   モバイルモード（幅900px未満: スマホ縦横・小さめタブレット）
   広告を上部に、その下にコンテンツを縦並びで表示
   JSでvertical-modeクラスが付与された場合に適用
   ===================== */
@media (max-width: 899px) {
    html, body {
        overflow: auto !important;
        height: auto !important;
        min-height: 100vh;
        background-color: var(--bg-color) !important;
    }

    /* スクロールバーを表示（手動スクロール用） */
    html::-webkit-scrollbar,
    body::-webkit-scrollbar {
        display: block;
        width: 8px;
    }

    html::-webkit-scrollbar-track,
    body::-webkit-scrollbar-track {
        background: #f1f1f1;
    }

    html::-webkit-scrollbar-thumb,
    body::-webkit-scrollbar-thumb {
        background: #888;
        border-radius: 4px;
    }

    html, body {
        -ms-overflow-style: auto;
        scrollbar-width: thin;
    }

    .container {
        display: flex !important;
        flex-direction: column !important;
        grid-template-columns: unset !important;
        grid-template-areas: unset !important;
        height: auto !important;
        min-height: 100vh !important;
        max-height: none !important;
        overflow: visible !important;
        background-color: var(--bg-color) !important;
    }

    /* 広告エリア: vertical-modeクラスで制御するため、CSSメディアクエリでは非表示 */
    .ad-area {
        display: none !important;
    }

    /* コンテンツエリア */
    .info-area {
        order: 1 !important;
        grid-area: unset !important;
        width: 100% !important;
        height: auto !important;
        max-height: none !important;
        min-height: auto !important;
        overflow: visible !important;
        padding: 2vmin !important;
        background-color: var(--bg-color) !important;
    }

    /* コンテンツグリッドを縦1列に */
    .content-grid {
        display: flex !important;
        flex-direction: column !important;
        grid-template-columns: none !important;
        grid-template-rows: none !important;
        gap: 2vmin;
        height: auto !important;
        overflow: visible !important;
    }

    /* スマホ（レスポンシブ）モード: 全て表示、スクロールで閲覧 */
    .schedule-section {
        order: 1 !important;
        grid-column: auto !important;
        min-height: auto !important;
        max-height: none !important;
        overflow: visible !important;
    }

    .notice-section {
        order: 2 !important;
        max-height: none !important;
        overflow: visible !important;
    }

    .assignment-section {
        order: 3 !important;
        max-height: none !important;
        overflow: visible !important;
    }

    /* プレースホルダー行（空データ）のスタイル */
    .notice-placeholder,
    .assignment-placeholder {
        visibility: hidden;
    }

    /* カード共通（縦長用） */
    .card {
        height: auto !important;
        min-height: auto;
        max-height: none !important;
        overflow: visible !important;
        padding: 2vmin;
    }

    .card h2 {
        font-size: clamp(1rem, 3vw, 1.4rem);
        padding-bottom: 0.5rem;
        margin-bottom: 0.5rem;
    }

    /* スマホ用スケジュールグリッド: 全て表示 */
    /* min-heightはJSで動的に設定（3行分の領域確保） */
    .schedule-grid-container {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 4px;
        /* min-heightはJSで設定 */
        max-height: none !important;
        overflow: visible !important;
    }

    .schedule-day-column {
        /* min-heightはJSで設定 */
        max-height: none !important;
        overflow: visible !important;
        display: flex !important;
        flex-direction: column !important;
    }

    .schedule-scroll-area {
        flex: 1 !important;
        /* min-heightはJSで設定 */
        max-height: none !important;
        overflow: visible !important;
    }

    .schedule-date-header {
        font-size: clamp(0.75rem, 2.5vw, 0.95rem);
        padding: 0.3rem;
        flex-shrink: 0 !important;
    }

    .schedule-list-item {
        font-size: clamp(0.8rem, 3vw, 1rem);
        padding: 0.4rem 0;
        line-height: 1.4;
    }

    .no-schedule {
        /* min-heightはJSで親要素に設定 */
        padding: 15px !important;
        display: flex;
        align-items: center;
        justify-content: center;
        height: 100%;
    }

    /* 連絡リスト */
    .list-group {
        height: auto !important;
        max-height: none !important;
        overflow: visible !important;
    }

    .list-group li {
        font-size: clamp(1rem, 3vw, 1.3rem);
        padding: 0.5rem 0;
    }

    /* 提出物テーブル */
    .table-wrapper {
        height: auto !important;
        max-height: none !important;
        overflow: visible !important;
    }

    .task-table th,
    .task-table td {
        font-size: clamp(0.9rem, 2.5vw, 1.1rem);
        padding: 0.5rem;
    }

    /* フッター - 余白を削減 */
    .branding {
        font-size: 0.75rem;
        padding: 8px 0;
        margin-bottom: 0;
    }

    /* ページ下部の余白を削除 */
    .info-area {
        padding-bottom: 0 !important;
    }

    .content-grid {
        gap: 10px !important;
    }
}

/* 小さい画面（スマホ: 幅600px以下） */
@media (max-width: 600px) {
    .info-area {
        padding: 1.5vmin;
    }

    .card {
        padding: 1.5vmin;
    }

    .card h2 {
        font-size: clamp(0.9rem, 4vw, 1.1rem);
    }

    .schedule-date-header {
        font-size: clamp(0.75rem, 3.5vw, 0.95rem);
    }

    .schedule-list-item {
        font-size: clamp(0.8rem, 3.5vw, 1rem);
    }

    .list-group li {
        font-size: clamp(0.85rem, 4vw, 1.1rem);
    }

    .task-table th,
    .task-table td {
        font-size: clamp(0.75rem, 3vw, 0.9rem);
    }
}

/* =====================
   大画面モニター対応（50インチ以上）
   フルHD解像度（1920x1080）の大型モニター向け
   ===================== */
@media (min-width: 1920px) and (min-height: 1080px) {
    :root {
        --scale-factor: 1.4;
        --content-gap: 15px;
    }
}

/* 1920x1080 フルHD（大型TVサイネージ向け） */
@media (min-width: 1800px) and (max-width: 1920px) {
    :root {
        --scale-factor: 1.3;
        --content-gap: 12px;
    }

    /* 広告ヘッダーは控えめに */
    .ad-header {
        padding: 8px 12px;
    }

    .date-text {
        font-size: 0.95rem;
    }

    .day-badge {
        font-size: 0.85rem;
    }

    .time-text {
        font-size: 0.95rem;
    }

    .class-title {
        font-size: 0.95rem;
    }

    .card h2 {
        font-size: 1rem;
    }

    .schedule-date-header {
        font-size: 1.2rem;
    }

    .schedule-list-item {
        font-size: 1.3rem;
    }

    .schedule-time {
        font-size: 0.8em;
    }

    .list-group li {
        font-size: 1.3rem;
        padding: 0.5rem 0;
    }

    .task-table th {
        font-size: 0.9rem;
    }

    .task-table td {
        font-size: 1.2rem;
        padding: 0.5rem;
    }

    .no-schedule,
    .no-notice,
    .no-assignment {
        font-size: 1rem;
    }

    .branding {
        font-size: 0.9rem;
    }
}

/* 4K解像度対応（3840x2160） */
@media (min-width: 3000px) {
    :root {
        --scale-factor: 2;
        --content-gap: 20px;
    }

    /* 広告ヘッダーは控えめに */
    .ad-header {
        padding: 10px 15px;
    }

    .date-text {
        font-size: 1.2rem;
    }

    .day-badge {
        font-size: 1rem;
    }

    .time-text {
        font-size: 1.2rem;
    }

    .class-title {
        font-size: 1.2rem;
    }

    .card h2 {
        font-size: 1.3rem;
    }

    .schedule-date-header {
        font-size: 1.6rem;
    }

    .schedule-list-item {
        font-size: 1.8rem;
    }

    .schedule-time {
        font-size: 0.75em;
    }

    .list-group li {
        font-size: 1.8rem;
        padding: 0.6rem 0;
    }

    .task-table th {
        font-size: 1.1rem;
    }

    .task-table td {
        font-size: 1.6rem;
        padding: 0.6rem;
    }
}