/* matching-card 専用スタイル */

/* ============================================
   共通カード
============================================ */
.mc-card {
    background: var(--white);
    border-radius: var(--border-radius-large);
    box-shadow: var(--shadow-large);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

/* ============================================
   index.php（教員：セッション作成）
============================================ */
.mc-count-input {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
    flex-wrap: wrap;
}

.mc-count-input input[type="number"] {
    width: 100px;
    padding: 12px 14px;
    font-size: 1.4rem;
    font-weight: 700;
    text-align: center;
    border: 2px solid var(--primary-color);
    border-radius: var(--border-radius);
    background: var(--white);
}

.mc-count-input input[type="range"] {
    flex: 1;
    min-width: 200px;
}

.mc-count-label {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--gray-darker);
}

.mc-teacher-hint {
    font-size: 1rem;
    padding: var(--spacing-md);
    background: #fff8e1;
    border-left: 4px solid var(--warning-color);
    border-radius: var(--border-radius-small);
    margin-top: var(--spacing-md);
    color: #333;
}

.mc-teacher-hint.hidden {
    display: none;
}

.mc-create-btn-wrap {
    text-align: center;
    margin: var(--spacing-xl) 0 var(--spacing-md);
}

.mc-url-box {
    background: var(--gray-light);
    border-radius: var(--border-radius);
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.mc-url-box label {
    font-size: 0.9em;
    font-weight: 700;
    color: var(--gray-darker);
    display: block;
    margin-bottom: 6px;
}

.mc-url-box-teacher {
    border-left: 4px solid var(--primary-color);
    background: rgba(0, 96, 100, 0.05);
}

.mc-url-row {
    display: flex;
    gap: 8px;
    align-items: center;
}

.mc-url-row input[type="text"] {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid var(--gray);
    border-radius: var(--border-radius-small);
    font-size: 0.9em;
    background: var(--white);
    color: var(--text-color);
}

.mc-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-top: var(--spacing-lg);
}

/* ============================================
   play.php（生徒：カード表示）
============================================ */
.mc-play-body {
    background: var(--background-color);
}

.mc-play-container {
    max-width: 560px;
    margin: 0 auto;
    padding: var(--spacing-md);
}

.mc-play-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.mc-card-number {
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--primary-color);
    line-height: 1;
    margin: 0;
}

.mc-card-number-label {
    font-size: 0.95rem;
    color: var(--gray-darker);
    margin-top: 4px;
}

.mc-teacher-badge {
    display: inline-block;
    background: var(--warning-color);
    color: var(--white);
    font-weight: 700;
    font-size: 0.9rem;
    padding: 4px 12px;
    border-radius: 12px;
    margin-top: 8px;
}

.mc-items {
    list-style: none;
    padding: 0;
    margin: 0;
}

.mc-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--gray-light);
}

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

.mc-item-answer {
    flex: 0 0 52px;
    height: 52px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--white);
}

.mc-item-answer.yes {
    background: var(--success-color);
}

.mc-item-answer.no {
    background: var(--danger-color);
}

.mc-item-text {
    flex: 1;
    font-size: 1.15rem;
    line-height: 1.4;
}

.mc-item-text .mc-item-type {
    display: inline-block;
    background: var(--gray-light);
    color: var(--gray-darker);
    font-size: 0.8rem;
    padding: 2px 8px;
    border-radius: 4px;
    margin-right: 6px;
    vertical-align: middle;
}

.mc-hint-toggle {
    margin-top: var(--spacing-md);
    text-align: center;
}

.mc-hint-toggle button {
    background: transparent;
    border: 1.5px dashed var(--gray-dark);
    color: var(--gray-darker);
    padding: 8px 16px;
    border-radius: var(--border-radius);
    font-size: 0.95rem;
    cursor: pointer;
}

.mc-hint-box {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(0, 151, 167, 0.08);
    border-radius: var(--border-radius);
    font-size: 1rem;
    line-height: 1.8;
}

.mc-hint-box.hidden {
    display: none;
}

.mc-hint-box ul {
    margin: 0;
    padding-left: 1.4em;
}

/* 画面を隠すボタン */
.mc-hide-btn {
    position: fixed;
    right: 16px;
    bottom: 16px;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 50px;
    padding: 14px 22px;
    font-size: 1rem;
    font-weight: 700;
    box-shadow: var(--shadow-large);
    cursor: pointer;
    z-index: 50;
}

.mc-mask-overlay {
    position: fixed;
    inset: 0;
    background: var(--primary-color);
    color: var(--white);
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    z-index: 1000;
    font-size: 1.5rem;
    text-align: center;
    padding: var(--spacing-xl);
}

.mc-mask-overlay.active {
    display: flex;
}

.mc-mask-overlay .mc-mask-title {
    font-size: 2.4rem;
    font-weight: 900;
    margin-bottom: var(--spacing-md);
}

.mc-mask-overlay .mc-mask-sub {
    font-size: 1rem;
    opacity: 0.85;
    margin-bottom: var(--spacing-xl);
}

.mc-mask-tap-btn {
    background: var(--white);
    color: var(--primary-color);
    border: none;
    border-radius: 50px;
    padding: 14px 28px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
}

/* マッチ申請エリア */
.mc-claim-section {
    margin-top: var(--spacing-lg);
}

.mc-claim-section h2 {
    font-size: 1.15rem;
    color: var(--primary-color);
    margin: 0 0 var(--spacing-sm);
}

.mc-claim-row {
    display: flex;
    gap: var(--spacing-sm);
    align-items: stretch;
}

.mc-claim-row input[type="number"] {
    flex: 1;
    padding: 14px;
    font-size: 1.4rem;
    font-weight: 700;
    text-align: center;
    border: 2px solid var(--primary-color);
    border-radius: var(--border-radius);
    background: var(--white);
}

.mc-claim-row button {
    flex: 0 0 auto;
    padding: 14px 24px;
    font-size: 1.1rem;
    font-weight: 700;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
}

.mc-claim-row button:disabled {
    background: var(--gray);
    cursor: not-allowed;
}

.mc-result {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    font-weight: 700;
    text-align: center;
    min-height: 3em;
    display: none;
}

.mc-result.show {
    display: block;
}

.mc-result.matched {
    background: rgba(76, 175, 80, 0.15);
    color: #2e7d32;
    border: 2px solid var(--success-color);
}

.mc-result.mismatch {
    background: rgba(244, 67, 54, 0.12);
    color: #b71c1c;
    border: 2px solid var(--danger-color);
}

.mc-result.already {
    background: rgba(245, 124, 0, 0.12);
    color: #bf360c;
    border: 2px solid var(--warning-color);
}

.mc-matched-done {
    margin-top: var(--spacing-md);
    padding: var(--spacing-lg);
    background: rgba(76, 175, 80, 0.12);
    border: 2px solid var(--success-color);
    border-radius: var(--border-radius);
    text-align: center;
}

.mc-matched-done .emoji {
    font-size: 3rem;
    display: block;
    margin-bottom: var(--spacing-sm);
}

.mc-matched-done .mc-partner {
    font-size: 2.4rem;
    font-weight: 900;
    color: var(--success-color);
}

.mc-matched-done .mc-msg {
    margin-top: var(--spacing-md);
    font-size: 1.05rem;
    line-height: 1.6;
}

.mc-error-box {
    padding: var(--spacing-lg);
    background: rgba(244, 67, 54, 0.1);
    border: 2px solid var(--danger-color);
    border-radius: var(--border-radius);
    text-align: center;
    font-size: 1.1rem;
    color: #b71c1c;
}

/* ============================================
   host.php（教員ダッシュボード）
============================================ */
.mc-dashboard {
    max-width: 1100px;
    margin: 0 auto;
}

.mc-dashboard-head {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.mc-stat-box {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-small);
    padding: var(--spacing-md);
    text-align: center;
}

.mc-stat-label {
    font-size: 0.9rem;
    color: var(--gray-darker);
    margin-bottom: 6px;
}

.mc-stat-value {
    font-size: 2rem;
    font-weight: 900;
    color: var(--primary-color);
    line-height: 1.1;
}

.mc-progress-bar {
    width: 100%;
    height: 12px;
    background: var(--gray-light);
    border-radius: 6px;
    overflow: hidden;
    margin-top: 8px;
}

.mc-progress-fill {
    height: 100%;
    background: var(--success-color);
    transition: width 0.4s ease;
}

.mc-timer-controls {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-top: var(--spacing-sm);
    flex-wrap: wrap;
}

.mc-timer-controls button {
    padding: 8px 16px;
    border: 1px solid var(--primary-color);
    background: var(--white);
    color: var(--primary-color);
    border-radius: var(--border-radius-small);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
}

.mc-timer-controls button:hover {
    background: var(--primary-color);
    color: var(--white);
}

.mc-timer-value.warning {
    color: var(--warning-color);
}

.mc-timer-value.danger {
    color: var(--danger-color);
    animation: mc-pulse 1s infinite;
}

@keyframes mc-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.mc-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.mc-card-tile {
    background: var(--white);
    border: 2px solid var(--danger-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-sm);
    text-align: center;
    position: relative;
    min-height: 72px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.mc-card-tile.matched {
    background: rgba(76, 175, 80, 0.12);
    border-color: var(--success-color);
}

.mc-card-tile.teacher {
    border-style: dashed;
}

.mc-card-tile.unmatched-alert {
    animation: mc-pulse 1s infinite;
}

.mc-card-tile-num {
    font-size: 1.6rem;
    font-weight: 900;
    color: var(--text-color);
}

.mc-card-tile-status {
    font-size: 0.75rem;
    color: var(--gray-darker);
    margin-top: 2px;
}

.mc-card-tile.matched .mc-card-tile-status {
    color: #2e7d32;
    font-weight: 700;
}

.mc-card-tile-teacher-mark {
    position: absolute;
    top: 2px;
    right: 4px;
    font-size: 0.7rem;
    color: var(--warning-color);
    font-weight: 700;
}

.mc-legend {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    justify-content: center;
    font-size: 0.9rem;
    color: var(--gray-darker);
    margin-top: var(--spacing-md);
}

.mc-legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.mc-legend-swatch {
    width: 16px;
    height: 16px;
    border: 2px solid;
    border-radius: 3px;
}

.mc-legend-swatch.matched {
    background: rgba(76, 175, 80, 0.12);
    border-color: var(--success-color);
}

.mc-legend-swatch.unmatched {
    background: var(--white);
    border-color: var(--danger-color);
}

.mc-legend-swatch.teacher {
    background: var(--white);
    border-style: dashed;
    border-color: var(--warning-color);
}

/* ============================================
   print.php（印刷カード）
============================================ */
.mc-print-info {
    margin: 0 auto var(--spacing-lg);
    max-width: 900px;
    padding: var(--spacing-md);
    background: rgba(0, 151, 167, 0.1);
    border-radius: var(--border-radius);
    font-size: 0.95rem;
    line-height: 1.6;
}

.mc-print-sheet {
    max-width: 900px;
    margin: 0 auto;
}

.mc-print-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8mm;
}

.mc-print-card {
    border: 2px dashed #999;
    border-radius: 4mm;
    padding: 6mm;
    display: flex;
    flex-direction: column;
    gap: 3mm;
    break-inside: avoid;
    page-break-inside: avoid;
    background: var(--white);
}

.mc-print-card-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    border-bottom: 1px solid #ccc;
    padding-bottom: 3mm;
}

.mc-print-card-num {
    font-size: 20pt;
    font-weight: 900;
    color: #000;
    line-height: 1;
}

.mc-print-card-num-label {
    font-size: 9pt;
    color: #666;
}

.mc-print-teacher-badge {
    background: #F57C00;
    color: #fff;
    padding: 2mm 3mm;
    border-radius: 3mm;
    font-weight: 700;
    font-size: 10pt;
}

.mc-print-items {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 2mm;
}

.mc-print-item {
    display: flex;
    align-items: center;
    gap: 3mm;
    font-size: 11pt;
    line-height: 1.3;
}

.mc-print-answer {
    flex: 0 0 8mm;
    height: 8mm;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14pt;
    font-weight: 900;
    color: #fff;
}

.mc-print-answer.yes { background: #4CAF50; }
.mc-print-answer.no  { background: #F44336; }

.mc-print-item-type {
    font-size: 9pt;
    color: #666;
    font-weight: 700;
    margin-right: 2mm;
}

.mc-print-footer {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-top: auto;
    padding-top: 3mm;
    border-top: 1px solid #ccc;
}

.mc-print-qr canvas {
    width: 22mm;
    height: 22mm;
}

.mc-print-qr-label {
    font-size: 8pt;
    color: #666;
    text-align: center;
    margin-top: 1mm;
}

.mc-print-instruction {
    font-size: 8.5pt;
    color: #444;
    line-height: 1.4;
    flex: 1;
    margin-right: 3mm;
}

@media print {
    body {
        background: #fff !important;
    }
    .no-print, .ad-left, .ad-right, .ad-horizontal, header, footer,
    .class-mode-toggle, .mc-print-info, .site-wrapper > .container > header {
        display: none !important;
    }
    .site-wrapper,
    .container {
        display: block !important;
        max-width: 100% !important;
        padding: 0 !important;
        margin: 0 !important;
        box-shadow: none !important;
    }
    .mc-print-sheet {
        max-width: 100%;
    }
    .mc-print-grid {
        grid-template-columns: 1fr 1fr;
        gap: 6mm;
    }
    .mc-print-card {
        border: 1.5px dashed #666;
        page-break-inside: avoid;
    }
    @page {
        size: A4;
        margin: 10mm;
    }
}

/* ============================================
   index.php モード選択
============================================ */
.mc-mode-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.mc-mode-btn {
    background: var(--white);
    border: 2px solid var(--gray);
    border-radius: var(--border-radius-large);
    padding: var(--spacing-lg);
    cursor: pointer;
    text-align: left;
    transition: transform 0.15s, border-color 0.15s, box-shadow 0.15s;
    color: var(--text-color);
    font-family: inherit;
}

.mc-mode-btn:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-large);
}

.mc-mode-icon {
    font-size: 2.4rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.mc-mode-title {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 6px;
}

.mc-mode-desc {
    font-size: 0.95rem;
    line-height: 1.55;
    color: var(--gray-darker);
    margin-bottom: var(--spacing-sm);
}

.mc-mode-meta {
    font-size: 0.85rem;
    color: var(--gray-darker);
    background: var(--gray-light);
    padding: 6px 10px;
    border-radius: var(--border-radius-small);
    display: inline-block;
}

.mc-url-box-student {
    border-left: 4px solid var(--success-color);
    background: rgba(76, 175, 80, 0.06);
}

/* ============================================
   print.php 紙モード追加分
============================================ */
.mc-print-pairs {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    flex-wrap: wrap;
}

.mc-print-pairs input[type="number"] {
    width: 80px;
    padding: 6px 10px;
    font-size: 1.1rem;
    font-weight: 700;
    text-align: center;
    border: 2px solid var(--primary-color);
    border-radius: var(--border-radius-small);
    background: var(--white);
}

.mc-print-card-paper {
    border: 2px dashed #888;
    min-height: 60mm;
}

.mc-print-footer-paper {
    margin-top: auto;
    padding-top: 3mm;
    border-top: 1px solid #ccc;
    font-size: 9pt;
    color: #555;
    text-align: center;
}

/* ============================================
   play.php 追加分（参加フォーム / アクションタブ / QR）
============================================ */
.mc-card-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--gray-darker);
    margin-top: 6px;
}

.mc-join-title {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.mc-join-label {
    display: block;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--gray-darker);
    margin-bottom: 6px;
    margin-top: var(--spacing-md);
}

.mc-join-input {
    width: 100%;
    padding: 14px;
    font-size: 1.2rem;
    border: 2px solid var(--primary-color);
    border-radius: var(--border-radius);
    background: var(--white);
    box-sizing: border-box;
}

.mc-join-input[type="number"] {
    text-align: center;
    font-weight: 700;
    font-size: 1.6rem;
}

.mc-join-btn {
    width: 100%;
    padding: 16px;
    margin-top: var(--spacing-lg);
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: var(--border-radius);
    font-size: 1.2rem;
    font-weight: 800;
    cursor: pointer;
}

.mc-join-btn:disabled {
    background: var(--gray);
    cursor: not-allowed;
}

.mc-join-hint {
    margin-top: var(--spacing-md);
    font-size: 0.9rem;
    color: var(--gray-darker);
    text-align: center;
    line-height: 1.5;
}

.mc-action-tabs {
    display: flex;
    gap: 4px;
    margin-top: var(--spacing-lg);
    background: var(--gray-light);
    border-radius: var(--border-radius);
    padding: 4px;
}

.mc-action-tab {
    flex: 1;
    background: transparent;
    border: none;
    padding: 12px 8px;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--gray-darker);
    cursor: pointer;
    border-radius: var(--border-radius-small);
    line-height: 1.3;
}

.mc-action-tab.active {
    background: var(--white);
    color: var(--primary-color);
    box-shadow: var(--shadow-small);
}

.mc-action-panel {
    margin-top: var(--spacing-md);
    min-height: 200px;
}

.mc-action-section {
    display: none;
}

.mc-action-section.active {
    display: block;
}

.mc-action-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.mc-panel-hint {
    font-size: 0.9rem;
    color: var(--gray-darker);
    text-align: center;
    margin-top: var(--spacing-sm);
    line-height: 1.5;
}

.mc-myqr-wrap {
    display: flex;
    justify-content: center;
    padding: var(--spacing-md);
    background: var(--white);
    border: 2px solid var(--primary-color);
    border-radius: var(--border-radius);
}

.mc-myqr-wrap canvas {
    width: 240px;
    height: 240px;
    max-width: 100%;
}

.mc-scan-wrap {
    position: relative;
    background: #000;
    border-radius: var(--border-radius);
    overflow: hidden;
    aspect-ratio: 1 / 1;
    max-width: 320px;
    margin: 0 auto;
}

.mc-scan-wrap video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.mc-scan-frame {
    position: absolute;
    inset: 12%;
    border: 3px solid rgba(255, 255, 255, 0.85);
    border-radius: var(--border-radius);
    pointer-events: none;
    box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.35);
}

.mc-scan-btn {
    display: block;
    margin: var(--spacing-md) auto 0;
    padding: 12px 24px;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
}

.mc-scan-btn.secondary {
    background: var(--gray);
}

.mc-partner-name {
    font-size: 1.4rem;
    font-weight: 700;
    color: #2e7d32;
    margin-top: 4px;
}

.mc-matched-title {
    font-size: 1.6rem;
    font-weight: 900;
    color: var(--success-color);
    margin-bottom: var(--spacing-sm);
}

.mc-matched-detail {
    font-size: 1.05rem;
    line-height: 1.7;
    margin-top: var(--spacing-sm);
}

/* ============================================
   host.php 追加分（生徒タイル）
============================================ */
.mc-students-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.mc-student-tile {
    background: var(--white);
    border: 2px solid var(--danger-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-sm);
    text-align: center;
    position: relative;
    min-height: 90px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
}

.mc-student-tile.matched {
    background: rgba(76, 175, 80, 0.12);
    border-color: var(--success-color);
}

.mc-student-tile.teacher {
    border-style: dashed;
}

.mc-student-tile.unmatched-alert {
    animation: mc-pulse 1s infinite;
}

.mc-student-num {
    font-size: 1.3rem;
    font-weight: 900;
    color: var(--text-color);
    line-height: 1;
}

.mc-student-name {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--gray-darker);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.mc-student-status {
    font-size: 0.78rem;
    color: var(--gray-darker);
}

.mc-student-tile.matched .mc-student-status {
    color: #2e7d32;
    font-weight: 700;
}

.mc-student-teacher-mark {
    position: absolute;
    top: 2px;
    right: 4px;
    font-size: 0.7rem;
    color: var(--warning-color);
    font-weight: 700;
}

.mc-teacher-joined {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(245, 124, 0, 0.08);
    border: 2px dashed var(--warning-color);
    border-radius: var(--border-radius);
    text-align: center;
}

.mc-teacher-joined.done {
    background: rgba(76, 175, 80, 0.1);
    border-color: var(--success-color);
    border-style: solid;
}

/* === 手順ヒント（QR読み取り導線説明） === */
.mc-howto {
    margin: 0 0 var(--spacing-md) 0;
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) 2.2em;
    background: rgba(33, 150, 243, 0.06);
    border-left: 4px solid var(--primary-color);
    border-radius: var(--border-radius);
    list-style: decimal;
    color: var(--text-color);
    font-size: 1rem;
    line-height: 1.7;
}
.mc-howto li {
    margin: 4px 0;
}
.mc-howto strong {
    color: var(--primary-color);
}

/* === マッチ後の次の流れ === */
.mc-next-steps {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: #fff;
    border: 2px solid var(--success-color);
    border-radius: var(--border-radius);
    text-align: left;
}
.mc-next-title {
    font-weight: 700;
    color: var(--success-color);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
    text-align: center;
}
.mc-next-list {
    margin: 0;
    padding-left: 1.4em;
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-color);
}
.mc-next-list li {
    margin: 6px 0;
}

/* === セッション終了通知（生徒画面） === */
.mc-session-ended {
    margin: var(--spacing-lg) auto;
    padding: var(--spacing-lg);
    background: #fff;
    border: 3px solid var(--text-light, #999);
    border-radius: var(--border-radius);
    text-align: center;
    color: var(--text-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}
.mc-ended-icon {
    font-size: 3rem;
    color: var(--text-light, #888);
    margin-bottom: var(--spacing-sm);
}
.mc-ended-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}
.mc-ended-msg {
    font-size: 1.05rem;
    line-height: 1.8;
    margin: 0;
}

/* ============================================
   文法選択（index.php / grammarSelectCard）
============================================ */
.form-group {
    margin: var(--spacing-md) 0;
}

.form-group label {
    display: block;
    font-size: 1rem;
    font-weight: 700;
    color: var(--gray-darker);
    margin-bottom: var(--spacing-xs);
}

.select-input {
    width: 100%;
    padding: 12px 14px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-color);
    background: var(--white);
    border: 2px solid var(--primary-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23555'><path d='M7 10l5 5 5-5z'/></svg>");
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 22px;
    padding-right: 40px;
}

.select-input:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 122, 204, 0.15);
}

#grammarPreview {
    color: var(--text-light, #777);
    font-size: 0.95rem;
    font-style: italic;
}

/* ============================================
   ダッシュボード：使用中の文法バッジ
============================================ */
.mc-grammar-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    margin-bottom: var(--spacing-md);
    background: #eef6fc;
    border: 1px solid #b6d8ec;
    border-radius: var(--border-radius);
    font-size: 0.95rem;
    color: var(--gray-darker);
}
.mc-grammar-badge i {
    color: var(--primary-color);
}
.mc-grammar-badge-label {
    font-weight: 600;
}
.mc-grammar-badge-name {
    font-weight: 700;
}

/* ============================================
   印刷画面：現在の文法表示
============================================ */
.mc-print-grammar {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    margin: var(--spacing-sm) 0;
    background: #eef6fc;
    border: 1px solid #b6d8ec;
    border-radius: var(--border-radius);
    font-size: 0.95rem;
    color: var(--gray-darker);
}
.mc-print-grammar i {
    color: var(--primary-color);
}
.mc-print-grammar-label {
    font-weight: 600;
}
.mc-print-grammar-name {
    font-weight: 700;
}