/* リセットCSS */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* カラーパレット */
:root {
    --warm-white: #FDFDFC;
    --washi-beige: #F7F5F2;
    --dark-brown: #4A413C;
    --sumi-black: #1A1A1A;
    --ember-orange: #D96704;
    --soft-ember: #E89A5C;
    --celadon: #6A8E7F;
    --border-light: #EAE5DA;
    --text-gray: #666666;
    --light-gray: #999999;
    /* 熾火の表現用の色を追加 */
    --ember-glow: #D35400; 
}

/* 基本設定 */
body {
    font-family: 'Noto Sans JP', sans-serif;
    background-color: var(--warm-white);
    color: var(--dark-brown);
    line-height: 1.9;
}

/* 和紙テクスチャ（控えめ） */
.subtle-texture {
    position: relative;
}

.subtle-texture::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 100px,
            rgba(0, 0, 0, 0.01) 100px,
            rgba(0, 0, 0, 0.01) 101px
        );
    pointer-events: none;
    opacity: 0.5;
}

/* ヘッダー */
.header {
    background: linear-gradient(to bottom, var(--warm-white), rgba(253, 253, 252, 0.95));
    padding: 2rem 0;
    position: sticky;
    top: 0;
    z-index: 50;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    transition: all 0.3s ease;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-title {
    /* フォントを「はんなり明朝」に変更 */
    font-family: 'Hannari Mincho', serif;
    font-size: 2.5rem; /* 少し大きくして可読性を調整 */
    font-weight: normal; /* フォントの持ち味を活かす */
    color: var(--sumi-black);
    text-decoration: none;
    letter-spacing: 0.08em; /* 文字間を少し広げる */
    position: relative;
    transition: color 0.3s ease;
}

.site-title:hover {
    color: var(--ember-orange);
}

.site-title::after {
    content: '🔥';
    position: absolute;
    right: -35px; /* 位置を調整 */
    top: 50%;
    transform: translateY(-50%);
    font-size: 1rem;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.site-title:hover::after {
    opacity: 0.7;
}

.site-subtitle {
    font-size: 0.75rem;
    color: var(--light-gray);
    letter-spacing: 0.15em;
    margin-top: 0.25rem;
}

/* ナビゲーション */
.nav {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-gray);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    position: relative;
    padding-bottom: 4px;
    transition: color 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    /* 熾火の色を適用 */
    background-color: var(--ember-glow);
    transition: width 0.3s ease;
}

.nav-link:hover {
    color: var(--dark-brown);
}

.nav-link:hover::after {
    width: 100%;
}

/* メインコンテナ */
.main-container {
    max-width: 1200px;
    margin: 4rem auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 4rem;
}

/* 記事カード */
.article-card {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 3rem;
    box-shadow: 0 3px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    border: 1px solid var(--border-light);
}

.article-card:hover {
    transform: translateY(-5px);
    /* 熾火の表現: カードの影を暖色系のグロー（発光）に変更 */
    border-color: var(--soft-ember);
    box-shadow: 0 8px 25px rgba(211, 84, 0, 0.2);
}

/* === イメージ画像セクションは変更しない === */
.article-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
    position: relative;
    overflow: hidden;
}

.fire-visual {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--celadon) 0%, var(--dark-brown) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.fire-icon {
    font-size: 3rem;
    opacity: 0.3;
    color: var(--soft-ember);
    animation: gentle-glow 3s ease-in-out infinite;
}

@keyframes gentle-glow {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.05); }
}
/* ======================================= */

.article-content {
    padding: 2rem 2.5rem 2.5rem;
}

.post-date {
    font-size: 0.875rem;
    color: var(--light-gray);
    margin-bottom: 0.75rem;
}

.post-category {
    display: inline-block;
    font-size: 0.75rem;
    color: var(--ember-orange);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
}

.post-title {
    font-family: 'Noto Serif JP', serif;
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--sumi-black);
    margin-bottom: 1rem;
    line-height: 1.4;
}

.post-title a {
    color: inherit;
    text-decoration: none;
    transition: color 0.3s ease;
}

.post-title a:hover {
    color: var(--ember-orange);
}

.post-excerpt {
    font-size: 0.95rem;
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.read-more {
    color: var(--ember-orange);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.read-more:hover {
    gap: 0.75rem;
    /* 熾火の表現: リンクの文字色と影 */
    color: var(--ember-glow);
    text-shadow: 0 0 5px rgba(211, 84, 0, 0.4);
}

/* サイドバー */
.sidebar {
    position: sticky;
    top: 8rem;
    height: fit-content;
}

.widget {
    background: white;
    padding: 2rem;
    margin-bottom: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border-light);
}

.widget-title {
    font-family: 'Noto Serif JP', serif;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--sumi-black);
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    /* 熾火の表現: 見出しの下線を暖かい色に */
    border-bottom: 2px solid var(--soft-ember);
}

.profile-text {
	line-height: 1.5rem;
	max-height: 7rem;
	overflow: hidden;
	text-overflow: ellipsis;
	display: -webkit-box;
	-webkit-line-clamp: 4;
	-webkit-box-orient: vertical;
    font-size: 0.9rem;
    line-height: 1.8;
    color: var(--text-gray);
}

.fireband-note {
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 0.85rem;
    color: var(--ember-orange);
    margin-top: 1rem;
    opacity: 0.8;
    font-weight: 500;
}

/* カテゴリーリスト */
.category-list {
    list-style: none;
}

.category-item {
    padding: 0.75rem 0;
    border-bottom: 1px dotted var(--border-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.category-link {
    color: var(--text-gray);
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    position: relative;
    padding-left: 0;
}

.category-link:hover {
    color: var(--ember-orange);
    padding-left: 0.5rem;
}

.category-count {
    font-size: 0.85rem;
    color: var(--light-gray);
}

/* 検索ボックス */
.search-box {
    position: relative;
    margin-bottom: 1rem;
}

.search-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-light);
    border-radius: 25px;
    font-size: 0.9rem;
    transition: border-color 0.3s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--ember-orange);
}

.search-icon {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--light-gray);
}

/* フッター */
.footer {
    background: var(--washi-beige);
    padding: 4rem 0 2rem;
    margin-top: 6rem;
    text-align: center;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    /* 熾火の表現: フッターの区切り線をグローに */
    background: linear-gradient(to right, transparent, var(--ember-glow), transparent);
    opacity: 0.6;
}

.footer-title {
    /* フォントを「はんなり明朝」に変更 */
    font-family: 'Hannari Mincho', serif;
    font-size: 2rem; /* サイズ調整 */
    font-weight: normal; /* フォントの持ち味を活かす */
    color: var(--dark-brown);
    margin-bottom: 0.5rem;
    letter-spacing: 0.08em;
}

.footer-subtitle {
    font-size: 0.9rem;
    color: var(--text-gray);
    margin-bottom: 2rem;
}

.footer-fireband {
    font-size: 0.75rem;
    color: var(--light-gray);
    letter-spacing: 0.2em;
    opacity: 0.7;
}

/* アニメーション */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* レスポンシブ */
@media (max-width: 1024px) {
    .main-container {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

    .site-title {
        font-size: 2.2rem;
    }

    .site-title::after {
        display: none;
    }
    
    .footer-title {
        font-size: 1.8rem;
    }

    .nav {
        gap: 1rem;
        justify-content: center;
        flex-wrap: wrap;
    }

    .nav-link {
        font-size: 0.875rem;
    }

    .article-content {
        padding: 1.5rem;
    }

    .post-title {
        font-size: 1.5rem;
    }
}