/* 統計ダッシュボード専用スタイル */

.stats-section {
    margin-bottom: 3rem;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--secondary);
}

/* ローディング表示 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.95);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-overlay.hidden {
    display: none;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid #e5e7eb;
    border-top: 4px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-overlay p {
    margin-top: 1rem;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* 統計グリッド */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    border: 2px solid var(--border);
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
    border-color: var(--primary);
}

.stat-icon {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-trend {
    font-size: 0.85rem;
    margin-top: 0.5rem;
}

.stat-trend.up {
    color: #10b981;
}

.stat-trend.down {
    color: #ef4444;
}

/* チャートコンテナ */
.chart-container {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    margin-bottom: 2rem;
    height: 400px;
}

.chart-container-small {
    background: white;
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    height: 300px;
}

/* カテゴリリスト */
.category-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
}

.category-item {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    border-left: 4px solid var(--primary);
}

.category-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.category-name {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.category-count {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.category-bar {
    width: 100%;
    height: 8px;
    background: #e5e7eb;
    border-radius: 4px;
    overflow: hidden;
    margin-top: 0.5rem;
}

.category-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 4px;
    transition: width 0.5s ease;
}

.category-percentage {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.3rem;
}

/* ランキングリスト */
.ranking-list {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

.ranking-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    transition: background 0.2s ease;
}

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

.ranking-item:hover {
    background: #f8fafc;
}

.ranking-number {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 700;
    color: white;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    flex-shrink: 0;
}

.ranking-number.top3 {
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
}

.ranking-content {
    flex: 1;
}

.ranking-purpose {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.3rem;
}

.ranking-category {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.ranking-count {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary);
    flex-shrink: 0;
}

/* 2カラムグリッド */
.two-column-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

/* 最近のプロンプト */
.recent-prompts {
    display: grid;
    gap: 1.5rem;
}

.recent-prompt-card {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    border-left: 4px solid var(--primary);
}

.recent-prompt-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.recent-prompt-category {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    color: var(--primary);
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
}

.recent-prompt-date {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.recent-prompt-purpose {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.8rem;
}

.recent-prompt-preview {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* CTAセクション */
.cta-section {
    text-align: center;
    margin: 4rem 0;
}

.cta-button {
    display: inline-block;
    padding: 1.2rem 3rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    text-decoration: none;
    border-radius: 12px;
    font-size: 1.2rem;
    font-weight: 700;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.4);
}

/* レスポンシブ */
@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .two-column-grid {
        grid-template-columns: 1fr;
    }

    .chart-container {
        height: 300px;
        padding: 1rem;
    }

    .chart-container-small {
        height: 250px;
        padding: 1rem;
    }

    .category-list {
        grid-template-columns: 1fr;
    }

    .stat-value {
        font-size: 2rem;
    }

    .section-title {
        font-size: 1.3rem;
    }
}