/* --- 最新レポートエリア (Hero Section) --- */
.latest-report-section {
    margin-bottom: 60px;
}

.latest-report-card {
    display: flex;
    flex-direction: column;
    background-color: var(--white);
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    border: 1px solid #e0e0e0;
}

@media (min-width: 768px) {
    .latest-report-card {
        flex-direction: row;
    }
}

/* 左側：表紙画像エリア */
.report-cover-area {
    background-color: #f0f2f5;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    min-width: 280px;
    border-right: 1px solid #eee;
}

/* 画像がない場合のプレースホルダー */
.cover-placeholder {
    width: 180px;
    height: 255px; /* A4比率 */
    background: linear-gradient(135deg, #fff, #f8f9fa);
    border: 1px solid #d0d0d0;
    box-shadow: 5px 5px 15px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 20px;
}

.cover-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    box-shadow: 2px 2px 5px rgba(0,0,0,0.2);
}

.cover-year {
    font-size: 40px;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
    margin-bottom: 10px;
}

.cover-text {
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: #999;
}

/* 右側：情報＆アクションエリア */
.report-info-area {
    padding: 32px;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.report-badge {
    display: inline-block;
    background-color: var(--accent-color);
    color: #fff;
    font-size: 14px;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 20px;
    margin-bottom: 12px;
    width: fit-content;
}

.report-title {
    font-size: 28px;
    margin: 0 0 16px;
    color: var(--text-color-dark);
    line-height: 1.4;
}

.report-description {
    font-size: 16px;
    color: var(--text-color);
    margin-bottom: 32px;
}

/* --- メインのPDFダウンロードボタン（チャコールグレー） --- */
.btn-download-primary {
    display: flex;
    align-items: center;
    background-color: #3c4043; /* 濃いグレー */
    color: #fff;
    padding: 16px 24px;
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(60, 64, 67, 0.3);
}

.btn-download-primary:hover {
    background-color: #202124;
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(60, 64, 67, 0.4);
}

.btn-download-primary .icon-box {
    font-size: 32px;
    color: #ff6b6b; /* 赤いアイコンでPDF感を強調 */
    margin-right: 16px;
}

.btn-download-primary .text-box {
    flex: 1;
}

.btn-download-primary .main-text {
    font-size: 18px;
    font-weight: 700;
}

.download-arrow {
    font-size: 20px;
    opacity: 0.5;
}

/* --- 章別リストレイアウト --- */
.chapter-section {
    margin-top: 40px;
}

.section-heading-left {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-color-dark);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-heading-left i {
    color: var(--secondary-color);
}

/* リスト形式 */
.chapter-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* リストアイテム */
.chapter-item {
    display: flex;
    align-items: center;
    background-color: #fff;
    border: 1px solid var(--light-gray);
    border-radius: 8px;
    padding: 16px 20px;
    text-decoration: none;
    color: var(--text-color-dark);
    transition: all 0.2s ease;
}

.chapter-item:hover {
    border-color: var(--accent-color);
    background-color: #fff8ff;
    transform: translateX(4px);
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

/* 項番 (01, 02...) */
.chapter-number {
    font-size: 16px;
    font-weight: 700;
    color: #b0b0b0;
    margin-right: 16px;
    font-family: 'Roboto', sans-serif;
    min-width: 24px;
}

.chapter-item:hover .chapter-number {
    color: var(--accent-color);
}

.chapter-name {
    flex: 1;
    font-size: 16px;
    font-weight: 500;
    line-height: 1.5;
}

.download-icon {
    font-size: 20px;
    color: var(--light-gray);
    margin-left: 16px;
    transition: color 0.2s;
}

.chapter-item:hover .download-icon {
    color: var(--accent-color);
}

/* --- アーカイブエリア (アコーディオン廃止・リスト化) --- */
.archive-section {
    margin-top: 60px;
    border-top: 1px solid var(--border-color);
    padding-top: 40px;
}

.archive-heading {
    text-align: center;
    font-size: 24px;
    color: var(--text-color-dark);
    margin-bottom: 32px;
}

.archive-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.archive-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #fff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px 24px;
    text-decoration: none;
    transition: all 0.3s ease;
    color: var(--text-color-dark);
}

.archive-item:hover {
    border-color: var(--text-color-dark); /* ダークグレーで枠強調 */
    background-color: #fff8ff;
    transform: translateY(-2px);
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.archive-info {
    display: flex;
    align-items: baseline;
    gap: 12px;
}

.archive-year {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-color-dark);
}

.archive-title {
    font-size: 16px;
    color: var(--text-color);
}

.archive-action {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 700;
    color: var(--text-color-dark);
}

.archive-action i {
    font-size: 18px;
}

/* アーカイブのホバー時のみテキスト色を変える場合 */
.archive-item:hover .archive-action {
    color: var(--accent-color);
}

/* スマホ対応 */
@media (max-width: 600px) {
    .archive-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .archive-action {
        background-color: #f1f3f4;
        width: 100%;
        padding: 8px;
        border-radius: 4px;
        justify-content: center;
        color: var(--text-color-dark);
    }
}