/**
 * 復習管理ウィジェット スタイル
 * 画面右下にフローティング表示、折りたたみ可能
 */

.review-tracker-widget {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 220px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.4);
    font-family: 'Hiragino Kaku Gothic Pro', 'メイリオ', sans-serif;
    font-size: 13px;
    z-index: 9999;
    overflow: hidden;
    transition: all 0.3s ease;
}

.review-tracker-widget.collapsed {
    width: 140px;
}

.review-tracker-widget.collapsed .review-tracker-body {
    display: none;
}

/* ヘッダー */
.review-tracker-header {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 12px;
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    cursor: pointer;
    user-select: none;
}

.review-tracker-icon {
    font-size: 16px;
}

.review-tracker-title {
    flex: 1;
    font-weight: bold;
    font-size: 13px;
}

.review-tracker-toggle {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: #fff;
    width: 24px;
    height: 24px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.review-tracker-toggle:hover {
    background: rgba(255, 255, 255, 0.35);
}

/* ボディ */
.review-tracker-body {
    padding: 12px;
    background: #fff;
    border-radius: 0 0 12px 12px;
}

/* 統計行 */
.review-tracker-stat {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 0;
    border-bottom: 1px solid #eee;
}

.review-tracker-stat:last-of-type {
    border-bottom: none;
    margin-bottom: 8px;
}

.stat-label {
    color: #666;
    font-size: 12px;
}

.stat-value {
    color: #333;
    font-weight: 500;
    font-size: 12px;
    text-align: right;
}

/* 次回復習の状態表示 */
.next-review .stat-value {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 2px;
}

.status-badge {
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 10px;
    font-weight: bold;
}

.next-review.overdue .status-badge {
    background: #fee2e2;
    color: #dc2626;
}

.next-review.today .status-badge {
    background: #fef3c7;
    color: #d97706;
}

.next-review.soon .status-badge {
    background: #dbeafe;
    color: #2563eb;
}

.next-review.ok .status-badge {
    background: #dcfce7;
    color: #16a34a;
}

/* クリアボタン */
.review-tracker-clear {
    width: 100%;
    padding: 8px;
    background: #f5f5f5;
    border: 1px solid #ddd;
    border-radius: 6px;
    color: #666;
    font-size: 11px;
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 4px;
}

.review-tracker-clear:hover {
    background: #eee;
    color: #333;
    border-color: #ccc;
}

/* モバイル対応 - ウィジェット全体を非表示 */
@media (max-width: 768px) {
    .review-tracker-widget {
        display: none !important;
    }
}


/* 印刷時は非表示 */
@media print {
    .review-tracker-widget {
        display: none !important;
    }
}