:root {
    --primary-color: #336699;
    --secondary-color: #4d4bab;
    --accent-color: #aaccee;
    --text-color: #1c272d;
    --background-color: #eef4fb;
    --card-background: rgba(255, 255, 255, 0.35);
    --card-border: rgba(170, 204, 238, 0.5);
    --card-hover-background: rgba(204, 224, 245, 0.35);

    --font-base: 16px;
    --font-small: 14px;
    --font-large: 20px;
    --font-weight-regular: 400;
    --font-weight-bold: 600;

    --border-radius: 8px;
    --box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
    --blur-value: 8px;

    --transition-duration: 0.2s;
}

/* 左サイドラッパー */
.left-wrapper {
    width: 25%;
    display: flex;
    flex-shrink: 1;
}

/* 左余白部分 (縮小優先) */
.left-margin {
    width: 60%;
    min-width: 0px;
    flex-shrink: 1;
}

/* 左サイドバー本体 */
.left-sidebar {
    width: 40%;
    min-width: 100px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    max-height: calc(100vh + 10vh);
    padding: 1rem;
    background-color: transparent;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--accent-color) transparent;
}


/* 右サイドラッパー */
.right-wrapper {
    width: 25%;
    display: flex;
    flex-shrink: 1;
}

/* 右余白部分 (縮小優先) */
.right-margin {
    width: 60%;
    min-width: 0px;
    flex-shrink: 1;
}

/* 右サイドバー本体 */
.right-sidebar {
    width: 40%;
    min-width: 100px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    max-height: calc(100vh + 10vh);
    padding: 1rem;
    background-color: transparent;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--accent-color) transparent;
}

.sidebar::-webkit-scrollbar {
    width: 8px;
}

.sidebar::-webkit-scrollbar-thumb {
    background-color: var(--accent-color);
    border-radius: 4px;
}

/* === �J�[�h�^�����N (�^�O�E���C�^�[�E���m�点) === */

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

.sidebar-link {
    background-color: var(--card-background);
    backdrop-filter: blur(var(--blur-value));
    -webkit-backdrop-filter: blur(var(--blur-value));
    border: 1px solid var(--card-border);
    box-shadow: var(--box-shadow);
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-bottom: 1rem;
    text-align: center;
    font-size: var(--font-base);
    color: var(--text-color);
    text-decoration: none;
    transition: transform var(--transition-duration), background-color var(--transition-duration);
}

.sidebar-link:hover {
    transform: scale(1.05);
    background-color: var(--card-hover-background);
}

/* === �T�C�h�o�[�p �L���J�[�h (�ŐV�L���E�֘A�L��) === */
.sidebar-article {
    display: flex;
    flex-direction: column;
    background-color: var(--card-background);
    backdrop-filter: blur(var(--blur-value));
    -webkit-backdrop-filter: blur(var(--blur-value));
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    margin-bottom: 12px;
    transition: transform var(--transition-duration), background-color var(--transition-duration);
}

.sidebar-article:hover {
    transform: scale(1.02);
    background-color: var(--card-hover-background);
}

.sidebar-article-image {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
}

.sidebar-article-content {
    padding: 10px 14px;
}

.sidebar-article-content h2 {
    margin: 0.3em 0 0;
    font-size: 0.85rem;
    color: var(--text-color);
    line-height: 1.3em;
}

/* === SNS �A�C�R�� === */

.sns-icons {
    display: flex;
    gap: 8px;
    margin-top: 0.5rem;
}

.sns-icon {
    width: 24px;
    height: 24px;
    transition: transform 0.2s ease;
}

.sns-icon:hover {
    transform: scale(1.2);
}

ul.category-list {
    list-style: none;
    margin: 0;

    background-color: var(--card-background);
    backdrop-filter: blur(var(--blur-value));
    -webkit-backdrop-filter: blur(var(--blur-value));
    border: 1px solid var(--card-border);
    box-shadow: var(--box-shadow);
    border-radius: var(--border-radius);
    padding: 0.3rem;
    margin-bottom: 1rem;
    text-align: center;
    font-size: var(--font-base);
    color: var(--text-color);
    text-decoration: none;
    transition: transform var(--transition-duration), background-color var(--transition-duration);
}


ul.category-list li {
    border-bottom: 1px solid #ddd;
    padding: 2px;
    padding-left: 8px;
    display: flex;
    font-size: var(--font-small);
    font-weight: var(--font-weight-regular);
    text-align: start;
}
ul.category-list li::before {
    content: "＞";
    color: green;
    margin: 4px;
}
ul.category-list li a {
    text-decoration: none;
    color: #333;
    flex: 1;
}
ul.category-list li.category-list-header {
    width: 100%;
    height: 1.8rem;
    display: block;
    font-size: var(--font-base);
    font-weight: var(--font-weight-bold);
    margin-bottom: 0.2rem;
    color: var(--primary-color);
    text-align: start;
}
.category-list-header::before {
    display: none;
}