/**
 * 「今、空いてる」CMS 公開サイト用スタイル
 * Design Concept: 静かな贅沢 - Quiet Luxury
 * Redesigned: 2025-11
 */

:root {
    /* Primary - 深いネイビー */
    --color-primary: #1a2a3a;
    --color-primary-dark: #0d1821;
    --color-primary-light: #2c3e50;

    /* Accent - 控えめなゴールド */
    --color-accent: #b8860b;
    --color-accent-light: #d4a84b;
    --color-accent-subtle: rgba(184, 134, 11, 0.1);

    /* Success - 上品なエメラルド（空いてる表示用） */
    --color-success: #2e7d6f;
    --color-success-light: #e8f5f2;

    /* Neutrals - 上質なグレー */
    --color-text-main: #1a1a1a;
    --color-text-secondary: #555555;
    --color-text-light: #888888;
    --color-text-white: #ffffff;

    /* Backgrounds */
    --color-bg-body: #fafafa;
    --color-bg-white: #ffffff;
    --color-bg-cream: #f8f6f3;
    --color-bg-dark: #1a2a3a;

    /* Borders */
    --border-color: #e8e8e8;
    --border-color-dark: #d0d0d0;

    /* Typography */
    --font-display: 'Noto Serif JP', 'Times New Roman', serif;
    --font-body: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 48px;
    --spacing-xxl: 80px;

    /* Layout */
    --container-width: 1200px;
    --content-width: 800px;
    --header-height: 80px;

    /* Transitions */
    --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   リセット・基本設定
   ========================================================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.8;
    color: var(--color-text-main);
    background-color: var(--color-bg-body);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.3s var(--transition-smooth);
}

a:hover {
    color: var(--color-accent);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ==========================================================================
   コンテナ
   ========================================================================== */

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ==========================================================================
   ヘッダー
   ========================================================================== */

.site-header {
    background-color: var(--color-bg-white);
    height: var(--header-height);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    transition: box-shadow 0.3s var(--transition-smooth);
}

.site-header.scrolled {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.site-title {
    margin: 0;
}

.site-title a {
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 500;
    color: var(--color-primary);
    letter-spacing: 0.08em;
    text-decoration: none;
}

.site-title a:hover {
    color: var(--color-primary);
}

.site-nav ul {
    display: flex;
    list-style: none;
    gap: 40px;
}

.site-nav a {
    color: var(--color-text-secondary);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.04em;
    padding: 8px 0;
    position: relative;
}

.site-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: width 0.3s var(--transition-smooth);
}

.site-nav a:hover {
    color: var(--color-primary);
}

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

/* ==========================================================================
   ヒーローセクション（写真背景）
   ========================================================================== */

.hero {
    position: relative;
    min-height: 520px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    margin-bottom: var(--spacing-xxl);
    /* フォールバック背景（画像がない場合） */
    background: linear-gradient(135deg, var(--color-bg-dark) 0%, var(--color-primary-light) 100%);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 1;
}

/* ダークオーバーレイ */
.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        135deg,
        rgba(26, 42, 58, 0.8) 0%,
        rgba(26, 42, 58, 0.6) 50%,
        rgba(44, 62, 80, 0.5) 100%
    );
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    color: var(--color-text-white);
    max-width: 700px;
    padding: 0 24px;
}

.hero-title {
    font-family: var(--font-display);
    font-size: 44px;
    font-weight: 500;
    margin-bottom: 20px;
    letter-spacing: 0.06em;
    line-height: 1.4;
}

.hero-description {
    font-size: 17px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 28px;
    line-height: 1.8;
    letter-spacing: 0.02em;
}

/* 「空いてる」バッジ */
.availability-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--color-text-white);
    padding: 10px 20px;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.04em;
}

.availability-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    background-color: var(--color-success);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
    box-shadow: 0 0 8px var(--color-success);
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.7;
        transform: scale(0.9);
    }
}

/* ==========================================================================
   メインコンテンツ
   ========================================================================== */

.site-main {
    min-height: calc(100vh - var(--header-height) - 200px);
    padding-bottom: var(--spacing-xxl);
}

/* ==========================================================================
   セクション
   ========================================================================== */

.posts-section {
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-family: var(--font-display);
    font-size: 26px;
    font-weight: 500;
    margin-bottom: 48px;
    text-align: center;
    color: var(--color-primary);
    letter-spacing: 0.06em;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -16px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 1px;
    background: var(--color-accent);
}

/* ==========================================================================
   記事グリッド
   ========================================================================== */

.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 32px;
    margin-bottom: 60px;
}

/* ==========================================================================
   記事カード
   ========================================================================== */

.post-card {
    background: var(--color-bg-white);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    overflow: hidden;
    transition: all 0.4s var(--transition-smooth);
}

.post-card:hover {
    border-color: var(--color-accent);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.08);
    transform: translateY(-4px);
}

/* サムネイル */
.post-card-thumbnail {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16 / 9;
}

.post-card-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s var(--transition-smooth);
}

.post-card:hover .post-card-thumbnail img {
    transform: scale(1.03);
}

/* サムネイル上のオーバーレイ（ホバー時） */
.post-card-thumbnail::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        180deg,
        transparent 60%,
        rgba(26, 42, 58, 0.3) 100%
    );
    opacity: 0;
    transition: opacity 0.4s var(--transition-smooth);
    pointer-events: none;
}

.post-card:hover .post-card-thumbnail::after {
    opacity: 1;
}

/* エリアバッジ */
.post-card-area-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    z-index: 2;
    background: var(--color-primary);
    color: var(--color-text-white);
    padding: 6px 14px;
    border-radius: 2px;
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.06em;
}

.post-card-area-badge a {
    color: var(--color-text-white);
}

/* カードコンテンツ */
.post-card-content {
    padding: 28px;
}

.post-card-title {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 500;
    margin-bottom: 12px;
    line-height: 1.5;
    letter-spacing: 0.02em;
}

.post-card-title a {
    color: var(--color-text-main);
}

.post-card-title a:hover {
    color: var(--color-primary);
}

.post-card-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.post-area {
    display: inline-block;
    background: var(--color-primary);
    color: var(--color-text-white);
    padding: 4px 12px;
    border-radius: 2px;
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.04em;
}

.post-area a {
    color: var(--color-text-white);
}

.post-card-date {
    color: var(--color-text-light);
    font-size: 12px;
    letter-spacing: 0.02em;
}

/* タグ */
.post-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.tag {
    display: inline-block;
    color: var(--color-text-light);
    padding: 4px 12px;
    border: 1px solid var(--border-color);
    border-radius: 2px;
    font-size: 12px;
    letter-spacing: 0.02em;
    transition: all 0.3s var(--transition-smooth);
}

.tag:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-text-white);
}

/* ==========================================================================
   ページヘッダー（一覧ページ用）
   ========================================================================== */

.page-header {
    text-align: center;
    padding: 60px 0 48px;
    margin-bottom: 40px;
}

.page-title {
    font-family: var(--font-display);
    font-size: 32px;
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: 16px;
    letter-spacing: 0.06em;
}

.page-description {
    color: var(--color-text-secondary);
    font-size: 15px;
    letter-spacing: 0.02em;
}

/* ==========================================================================
   記事詳細ページ
   ========================================================================== */

.post-detail {
    background: var(--color-bg-white);
    border-radius: 4px;
    padding: 0;
    max-width: 900px;
    margin: 0 auto;
    border: 1px solid var(--border-color);
}

/* アイキャッチ画像 */
.post-eyecatch {
    width: 100%;
    max-height: 450px;
    object-fit: cover;
}

/* サムネイル画像（記事詳細ページ用） */
.post-thumbnail {
    margin-bottom: 32px;
}

.post-thumbnail img {
    width: 100%;
    max-height: 450px;
    object-fit: cover;
    border-radius: 4px;
}

.post-header {
    padding: 48px 60px 40px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.post-meta-top {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
    font-size: 13px;
    color: var(--color-text-light);
}

.post-title {
    font-family: var(--font-display);
    font-size: 32px;
    font-weight: 500;
    margin-bottom: 24px;
    line-height: 1.5;
    color: var(--color-primary);
    letter-spacing: 0.04em;
}

.post-tags {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
}

/* 記事本文 */
.post-content {
    padding: 48px 60px;
    font-size: 16px;
    line-height: 2;
    color: var(--color-text-main);
}

.post-content h2 {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 500;
    margin-top: 56px;
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
    color: var(--color-primary);
    letter-spacing: 0.04em;
}

.post-content h3 {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 500;
    margin-top: 40px;
    margin-bottom: 16px;
    padding-left: 16px;
    border-left: 3px solid var(--color-accent);
    color: var(--color-primary);
}

.post-content p {
    margin-bottom: 24px;
}

.post-content ul,
.post-content ol {
    margin-bottom: 24px;
    padding: 28px 36px;
    background: var(--color-bg-cream);
    border-radius: 4px;
}

.post-content li {
    margin-bottom: 10px;
    padding-left: 8px;
}

.post-content li:last-child {
    margin-bottom: 0;
}

.post-content blockquote {
    margin: 36px 0;
    padding: 24px 32px;
    background: var(--color-bg-cream);
    border-left: 3px solid var(--color-accent);
    font-style: normal;
    color: var(--color-text-secondary);
    border-radius: 0 4px 4px 0;
}

.post-content blockquote p {
    margin-bottom: 0;
}

/* 記事内の画像 */
.post-content img {
    width: 100%;
    border-radius: 4px;
    margin: 40px 0;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}

.post-content figure {
    margin: 40px 0;
}

.post-content figcaption {
    text-align: center;
    color: var(--color-text-light);
    font-size: 13px;
    margin-top: 12px;
    letter-spacing: 0.02em;
}

.post-content pre {
    background: var(--color-primary-dark);
    color: #f1f2f6;
    padding: 24px;
    border-radius: 4px;
    overflow-x: auto;
    margin-bottom: 28px;
    font-size: 14px;
    line-height: 1.6;
}

.post-content code {
    font-family: 'Consolas', 'Monaco', monospace;
}

.post-content p code {
    background: var(--color-bg-cream);
    padding: 2px 8px;
    border-radius: 3px;
    color: var(--color-accent);
    font-size: 0.9em;
}

/* 記事フッター */
.post-footer {
    padding: 40px 60px;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

/* ==========================================================================
   ボタン
   ========================================================================== */

.btn {
    display: inline-block;
    padding: 14px 36px;
    border-radius: 2px;
    font-weight: 500;
    font-size: 14px;
    letter-spacing: 0.06em;
    text-align: center;
    transition: all 0.3s var(--transition-smooth);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-text-white);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    color: var(--color-text-white);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(26, 42, 58, 0.2);
}

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

.btn-secondary:hover {
    background: var(--color-primary);
    color: var(--color-text-white);
}

/* ==========================================================================
   ページネーション
   ========================================================================== */

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 24px;
    margin-top: 48px;
}

.pagination-prev,
.pagination-next {
    padding: 10px 24px;
    border: 1px solid var(--border-color);
    border-radius: 2px;
    font-size: 14px;
    color: var(--color-text-secondary);
    transition: all 0.3s var(--transition-smooth);
}

.pagination-prev:hover,
.pagination-next:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.pagination-info {
    color: var(--color-text-light);
    font-size: 14px;
    letter-spacing: 0.04em;
}

/* ==========================================================================
   フッター
   ========================================================================== */

.site-footer {
    background: var(--color-bg-dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 60px 0 40px;
    margin-top: var(--spacing-xxl);
}

.site-footer .container {
    text-align: center;
}

.footer-nav {
    margin-bottom: 24px;
}

.footer-nav ul {
    display: flex;
    justify-content: center;
    gap: 32px;
    list-style: none;
}

.footer-nav a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 13px;
    letter-spacing: 0.04em;
    transition: color 0.3s var(--transition-smooth);
}

.footer-nav a:hover {
    color: var(--color-text-white);
}

.site-footer p {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
    letter-spacing: 0.02em;
}

/* ==========================================================================
   ユーティリティ
   ========================================================================== */

.no-posts {
    text-align: center;
    padding: 60px 20px;
    color: var(--color-text-light);
}

/* フェードインアニメーション */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s var(--transition-smooth) forwards;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   レスポンシブ
   ========================================================================== */

@media (max-width: 768px) {
    :root {
        --spacing-xl: 32px;
        --spacing-xxl: 48px;
    }

    .site-header {
        height: auto;
        padding: 16px 0;
        position: relative;
    }

    .site-header .container {
        flex-direction: column;
        gap: 12px;
    }

    .site-nav ul {
        gap: 20px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero {
        min-height: 400px;
        margin-bottom: var(--spacing-xl);
    }

    .hero-title {
        font-size: 28px;
    }

    .hero-description {
        font-size: 15px;
    }

    .posts-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .page-header {
        padding: 40px 0 32px;
    }

    .page-title {
        font-size: 26px;
    }

    .post-detail {
        border-radius: 0;
        border-left: none;
        border-right: none;
    }

    .post-header {
        padding: 32px 20px 28px;
    }

    .post-title {
        font-size: 24px;
    }

    .post-content {
        padding: 32px 20px;
        font-size: 15px;
    }

    .post-content h2 {
        font-size: 20px;
    }

    .post-content h3 {
        font-size: 18px;
    }

    .post-footer {
        padding: 28px 20px;
    }

    .section-title {
        font-size: 22px;
        margin-bottom: 36px;
    }

    .footer-nav ul {
        flex-wrap: wrap;
        gap: 16px 24px;
    }
}

@media (max-width: 480px) {
    .availability-badge {
        font-size: 12px;
        padding: 8px 16px;
    }

    .post-card-content {
        padding: 20px;
    }

    .post-card-title {
        font-size: 16px;
    }
}