/*
Theme Name: CoAI Theme
Theme URI: https://example.com/coai-theme
Author: Your Name
Author URI: https://example.com
Description: AI情報系サイト「CoAI」用カスタムテーマ
Version: 1.0
Text Domain: coai
*/

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;700&display=swap');

/* ---------- 基本設定 ---------- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --accent: #f59e0b;
    --success: #10b981;
    --white: #fff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --font: 'Noto Sans JP', sans-serif;
    --transition: 0.2s ease-in-out;
    --chatgpt-color: #10a37f;
    --midjourney-color: #8b5cf6;
    --claude-color: #10b981;
}

body {
    font-family: var(--font);
    line-height: 1.7;
    color: var(--gray-800);
    background: var(--gray-50);
}

.container {
    max-width: 1200px;
    margin: auto;
    padding: 0 1rem;
}

/* ---------- 共通ボタン ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
}

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-700);
}

.btn-secondary:hover {
    background: var(--gray-300);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

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

.btn-back {
    background: var(--gray-200);
    color: var(--gray-700);
    margin-bottom: 1rem;
}

.btn-back:hover {
    background: var(--gray-300);
}

/* ---------- ヘッダー ---------- */
.header {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
}

.logo h1 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.logo a {
    text-decoration: none;
    color: inherit;
}

.search-container {
    display: flex;
    align-items: center;
    background: var(--gray-100);
    border-radius: 1.5rem;
    padding: 0.5rem;
    flex: 1;
    max-width: 270px;
    margin: 0 1.5rem;
}

.search-input {
    flex: 1;
    border: none;
    background: transparent;
    padding: 0.5rem 1rem;
    font-size: 1rem;
    outline: none;
}

.search-btn {
    background: var(--primary);
    border: none;
    border-radius: 0.5rem;
    color: var(--white);
    padding: 0.5rem 1rem;
    cursor: pointer;
    transition: var(--transition);
}

.search-btn:hover {
    background: var(--primary-hover);
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 0;
    margin: 0;
    padding: 0;
}

.nav-link {
    display: block;
    padding: 1rem 1.5rem;
    color: var(--gray-600);
    font-weight: 500;
    text-decoration: none;
    border-bottom: 3px solid transparent;
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--gray-700);
    cursor: pointer;
}

/* ---------- メインコンテンツ ---------- */
.main {
    padding: 2rem 0;
}

.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
    color: var(--white);
    padding: 3rem 0;
    text-align: center;
    border-radius: 1rem;
    margin-bottom: 2rem;
}

.hero h2 {
    font-size: 2.25rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.125rem;
    opacity: 0.9;
}

/* ---------- パンくずリスト ---------- */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--gray-600);
    margin-bottom: 1.5rem;
    padding: 0.75rem 0;
}

.breadcrumb a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}

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

/* ---------- コンテンツレイアウト ---------- */
.content-wrapper {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 2rem;
}

.sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.sidebar-section {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 1rem;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.sidebar-section h3 {
    font-size: 1.125rem;
    margin-bottom: 1rem;
    color: var(--gray-800);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.category-list {
    list-style: none;
    padding: 0;
}

.category-list a {
    display: block;
    color: var(--gray-600);
    padding: 0.5rem 0;
    text-decoration: none;
    transition: var(--transition);
}

.category-list a:hover {
    color: var(--primary);
    padding-left: 0.5rem;
}

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    background: var(--gray-100);
    color: var(--gray-700);
    padding: 0.25rem 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

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

/* ---------- カードスタイル ---------- */
.service-card, .article-card, .tutorial-card, .interview-card {
    background: var(--white);
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    margin-bottom: 1.5rem;
}

.service-card:hover, .article-card:hover, .tutorial-card:hover, .interview-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

/* ---------- サービスカード ---------- */
.service-header {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.service-icon {
    width: 80px;
    height: 80px;
    border-radius: 1rem;
    object-fit: cover;
}

.service-icon-placeholder {
    width: 80px;
    height: 80px;
    background: var(--gray-200);
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-600);
}

.service-info h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.service-category {
    color: var(--gray-500);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.service-rating {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.stars {
    color: var(--accent);
}

.service-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1rem 0;
}

.feature-tag {
    background: var(--gray-100);
    padding: 0.25rem 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.75rem;
}

.service-pricing {
    display: flex;
    align-items: baseline;
    gap: 0.25rem;
    margin-bottom: 1rem;
}

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

.service-actions {
    display: flex;
    gap: 1rem;
}

/* ---------- グリッドレイアウト ---------- */
.services-grid, .articles-grid, .tutorials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 1.5rem;
}

.interviews-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* ---------- 記事カード ---------- */
.article-image {
    position: relative;
    height: 200px;
    overflow: hidden;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
}

.article-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.article-category {
    position: absolute;
    top: 0.75rem;
    left: 0.75rem;
    background: var(--primary);
    color: var(--white);
    padding: 0.25rem 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.75rem;
}

.article-content h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.article-content h3 a {
    text-decoration: none;
    color: inherit;
}

.article-content h3 a:hover {
    color: var(--primary);
}

.article-content p {
    color: var(--gray-600);
    margin-bottom: 1rem;
}

.article-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--gray-500);
}

/* ---------- チュートリアルカード ---------- */
.tutorial-image {
    position: relative;
    height: 200px;
    overflow: hidden;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
}

.tutorial-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.tutorial-duration, .tutorial-level {
    position: absolute;
    top: 0.75rem;
    padding: 0.25rem 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.75rem;
    color: var(--white);
}

.tutorial-duration {
    right: 0.75rem;
    background: var(--gray-800);
}

.tutorial-level {
    left: 0.75rem;
}

.beginner {
    background: var(--success);
}

.intermediate {
    background: var(--accent);
}

.advanced {
    background: #ef4444;
}

.tutorial-steps {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 1rem 0;
}

.tutorial-progress {
    flex: 1;
    height: 6px;
    background: var(--gray-200);
    border-radius: 0.25rem;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--success);
}

/* ---------- インタビューカード ---------- */
.interview-card {
    display: flex;
    gap: 1.5rem;
    padding: 1.5rem;
}

.expert-photo {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.interview-content {
    flex: 1;
}

.interview-header h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.interview-header h3 a {
    text-decoration: none;
    color: inherit;
}

.interview-header h3 a:hover {
    color: var(--primary);
}

.expert-title {
    color: var(--primary);
    font-weight: 500;
    margin-bottom: 0.75rem;
}

.interview-excerpt {
    color: var(--gray-600);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.interview-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-bottom: 1rem;
}

.interview-tags {
    display: flex;
    gap: 0.5rem;
}

/* ---------- フィルターセクション ---------- */
.filter-section {
    margin-bottom: 2rem;
}

.filter-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--gray-300);
    background: var(--white);
    color: var(--gray-600);
    border-radius: 0.5rem;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

/* ---------- 個別記事ページ ---------- */
.news-article, .tutorial-article, .interview-article {
    background: var(--white);
    border-radius: 1rem;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
    overflow: hidden;
    margin-bottom: 2rem;
}

.news-hero, .tutorial-hero, .interview-hero {
    width: 100%;
    height: 320px;
    object-fit: cover;
    display: block;
}

.news-header, .tutorial-header, .interview-header {
    padding: 2rem 2rem 1rem;
}

.news-title, .tutorial-title, .interview-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.news-meta, .tutorial-meta, .interview-meta {
    color: var(--gray-600);
    font-size: 0.95rem;
    margin-bottom: 1.25rem;
}

.news-meta .tag, .tutorial-meta .tag, .interview-meta .tag {
    background: var(--gray-200);
    padding: 2px 1em;
    border-radius: 1em;
    color: var(--primary);
    margin-right: 0.5em;
}

.news-lead, .tutorial-lead, .interview-lead {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    color: var(--gray-700);
}

.news-body, .tutorial-body, .interview-body {
    padding: 0 2rem 2rem;
    font-size: 1rem;
}

.news-body h2, .tutorial-body h2, .interview-body h2 {
    font-size: 1.25rem;
    color: var(--gray-800);
    margin: 2.5rem 0 1rem;
}

.news-body p, .tutorial-body p, .interview-body p {
    margin-bottom: 1.3rem;
}

.news-body blockquote, .tutorial-body blockquote, .interview-body blockquote {
    background: var(--gray-100);
    border-left: 4px solid var(--primary);
    padding: 1rem 1.5rem;
    font-style: italic;
    margin: 2rem 0;
    border-radius: 0 0.5rem 0.5rem 0;
}

.news-tags, .tutorial-tags, .interview-tags {
    display: flex;
    gap: 0.5em;
    margin-top: 1.5rem;
    font-size: 0.85rem;
}

.news-tags .tag, .tutorial-tags .tag, .interview-tags .tag {
    background: var(--gray-100);
    color: var(--gray-800);
    border-radius: 1em;
    padding: 4px 1em;
}

/* ---------- サービス詳細ページ ---------- */
.service-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 3rem;
}

.service-main {
    background: var(--white);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.service-header {
    background: rgb(255, 255, 255);
    color: rgba(0, 0, 0, 1);
    /* padding: 3rem 2rem 2rem; */
    text-align: center;
}

.service-logo {
    width: 120px;
    height: 120px;
    background: var(--white);
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

.service-logo img {
    width: 80px;
    height: 80px;
    object-fit: contain;
}

.service-logo-text {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary);
}

.service-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.service-subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 2rem;
}

.service-actions {
    display: flex;
    gap: 1rem;
    /* justify-content: center; */
    flex-wrap: wrap;
}

/* .service-content {
    padding: 3rem;
} */

.section {
    margin-bottom: 3rem;
}

.section h2 {
    font-size: 1.75rem;
    color: var(--gray-800);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.section h3 {
    font-size: 1.25rem;
    color: var(--gray-800);
    margin: 2rem 0 1rem;
}

.section p {
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.section ul {
    margin: 1.5rem 0;
    padding-left: 2rem;
}

.section li {
    margin-bottom: 0.5rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.feature-card {
    background: var(--gray-50);
    padding: 1.5rem;
    border-radius: 1rem;
    text-align: center;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.feature-card h4 {
    color: var(--gray-800);
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--gray-600);
    font-size: 0.875rem;
}

/* ---------- サービスサイドバー ---------- */
.service-sidebar {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.specs-list {
    list-style: none;
    padding: 0;
}

.specs-list li {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--gray-200);
}

.specs-list li:last-child {
    border-bottom: none;
}

.spec-label {
    font-weight: 500;
    color: var(--gray-700);
}

.spec-value {
    color: var(--gray-600);
}

/* ---------- 固定ページ ---------- */
.page-content {
    background: var(--white);
    border-radius: 1rem;
    padding: 3rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.page-header {
    text-align: center;
    margin-bottom: 3rem;
}

.page-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.page-body h2 {
    font-size: 1.75rem;
    margin: 2rem 0 1rem;
}

.page-body h3 {
    font-size: 1.25rem;
    margin: 1.5rem 0 1rem;
}

.page-body p {
    margin-bottom: 1.5rem;
}

.page-body ul {
    margin: 1.5rem 0;
    padding-left: 2rem;
}

/* ---------- エラーページ ---------- */
.error-404 {
    text-align: center;
    padding: 3rem;
    background: var(--white);
    border-radius: 1rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.error-404 h1 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--gray-800);
}

.error-404 p {
    color: var(--gray-600);
    margin-bottom: 2rem;
}

.error-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

/* ---------- ページネーション ---------- */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin: 2rem 0;
}

.page-numbers {
    padding: 0.5rem 1rem;
    border: 1px solid var(--gray-300);
    border-radius: 0.5rem;
    text-decoration: none;
    color: var(--gray-600);
    transition: var(--transition);
}

.page-numbers:hover,
.page-numbers.current {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

/* ---------- フッター ---------- */
.footer {
    background: var(--gray-800);
    color: var(--white);
    padding: 3rem 0 2rem;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
}

.footer-section p {
    color: var(--gray-400);
}

.footer-section ul {
    list-style: none;
    padding: 0;
}

.footer-section a {
    color: var(--gray-400);
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    border-top: 1px solid var(--gray-700);
    padding-top: 2rem;
    color: var(--gray-400);
    font-size: 0.875rem;
}

/* ---------- レスポンシブ ---------- */
@media (max-width: 1024px) {
    .content-wrapper {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .sidebar {
        order: -1;
        flex-direction: row;
        overflow-x: auto;
    }
    
    .sidebar-section {
        flex-shrink: 0;
        min-width: 250px;
    }
    
    .service-layout {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .service-sidebar {
        order: -1;
        flex-direction: row;
        overflow-x: auto;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-wrap: wrap;
        gap: 1rem;
    }
    
    .search-container {
        order: 3;
        flex-basis: 100%;
        margin: 0;
        max-width: none;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .nav-list {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        border-bottom: 1px solid var(--gray-200);
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    }
    
    .nav-list.active {
        display: flex;
    }
    
    .nav-link {
        border-bottom: 1px solid var(--gray-200);
        border-right: none;
    }
    
    .nav-link:last-child {
        border-bottom: none;
    }
    
    .hero h2 {
        font-size: 1.75rem;
    }
    
    .services-grid, .articles-grid, .tutorials-grid {
        grid-template-columns: 1fr;
    }
    
    .interview-card {
        flex-direction: column;
        text-align: center;
    }
    
    .service-header {
        padding: 2rem 1.5rem;
    }
    
    .service-title {
        font-size: 2rem;
    }
    
    .service-content {
        padding: 2rem 1.5rem;
    }
    
    .service-sidebar {
        flex-direction: column;
    }
    
    .news-header, .news-body,
    .tutorial-header, .tutorial-body,
    .interview-header, .interview-body {
        padding: 1rem;
    }
    
    .news-title, .tutorial-title, .interview-title {
        font-size: 1.5rem;
    }
    
    .news-hero, .tutorial-hero, .interview-hero {
        height: 180px;
    }
    
    .page-content {
        padding: 2rem 1.5rem;
    }
    
    .page-title {
        font-size: 2rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .error-actions {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .hero h2 {
        font-size: 1.5rem;
    }
    
    .service-title {
        font-size: 1.75rem;
    }
    
    .news-title, .tutorial-title, .interview-title {
        font-size: 1.25rem;
    }
    
    .page-title {
        font-size: 1.75rem;
    }
}