/* Core Design Variables */
:root {
    --bg-color: #fcfaf7;
    /* Warm off-white */
    --card-bg: #ffffff;
    --text-primary: #4a3a33;
    /* Soft dark brown */
    --text-secondary: #7d6b63;
    --accent-blue: #5599ff;
    /* Muted blue for technology */
    --accent-gold: #d4a373;
    /* Cafe latte / Gold */
    --accent-green: #7ca982;
    /* Soft green */
    --container-width: 1100px;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

h1,
h2,
h3 {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

.text-center {
    text-align: center;
}

.section-padding {
    padding: 80px 0;
}

/* アンカーリンクでヘッダーに隠れないよう余白確保 */
section[id] {
    scroll-margin-top: 130px;
}

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

/* Header & Nav */
header {
    background: rgba(252, 250, 247, 0.9);
    backdrop-filter: blur(10px);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 2px solid var(--accent-gold);
}

header nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 120px;
    /* ロゴ 100px に合わせてヘッダーを 120px に調整 */
}

.logo {
    display: flex;
    align-items: center;
    padding: 10px 0;
}

.logo img {
    height: 100px;
    /* ご指定通り、表示高さを 100px に設定 */
    width: auto;
    display: block;
    transition: transform 0.3s ease;
}

.logo img:hover {
    transform: scale(1.03);
    /* 看板に触れた時に少し浮き上がる演出 */
}

.logo a {
    text-decoration: none;
    display: flex;
    align-items: center;
}

header ul {
    display: flex;
    list-style: none;
}

header li {
    margin-left: 30px;
}

header a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 600;
    transition: color 0.3s;
}

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

/* Hero Section */
.hero {
    padding: 180px 0 100px;
    /* ヘッダーが 120px になったため、余白を広げて重なりを解消 */
    background: #f4efeb;
    /* Soft cafe color */
    text-align: center;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-image {
    width: 250px;
    height: auto;
    margin-bottom: 20px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.hero h1 {
    font-size: clamp(2.2rem, 8vw, 3.5rem);
    line-height: 1.2;
    margin-bottom: 25px;
    color: var(--text-primary);
}

.hero-desc {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto 35px;
}

.badge {
    display: inline-block;
    background: #ffffff;
    color: var(--accent-gold);
    padding: 6px 18px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    border: 2px solid var(--accent-gold);
}

/* News Section */
.section-header-with-icon {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 40px;
}

.section-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: 2px solid var(--accent-gold);
}

.section-title {
    font-size: 1.8rem;
    margin-bottom: 0;
    padding-left: 15px;
    border-left: 5px solid var(--accent-gold);
    color: var(--text-primary);
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.news-item {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    gap: 20px;
    border: 1px solid #eee;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.03);
    transition: transform 0.3s, border-color 0.3s;
    cursor: pointer;
}

.news-item:hover {
    transform: translateY(-3px);
    border-color: var(--accent-gold);
}

.news-item .date {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.news-item .category {
    background: var(--accent-gold);
    color: #ffffff;
    padding: 3px 12px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
}

.news-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.news-link:hover .news-item {
    border-color: var(--accent-gold);
    background: #fffcf9;
}

/* Bridge Section (Grid & Content Box) */
.content-box {
    background: white;
    padding: 50px;
    border-radius: 30px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.03);
}

.character-say {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    margin-bottom: 40px;
    background: #fff9f0;
    padding: 30px;
    border-radius: 20px;
    border: 1px dashed var(--accent-gold);
}

.chat-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    flex-shrink: 0;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.bubble p {
    margin-bottom: 10px;
    color: var(--text-primary);
    font-size: 1.1rem;
    line-height: 1.7;
}

.grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 20px;
    border: 1px solid #f0f0f0;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.05);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.card h3 {
    margin-bottom: 15px;
    color: var(--text-primary);
}

.card p {
    font-size: 1rem;
    color: var(--text-secondary);
}

.lead {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--accent-gold);
}

/* Buttons & CTA */
.btn {
    display: inline-block;
    padding: 16px 45px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    transition: transform 0.3s, background 0.3s, box-shadow 0.3s;
}

.btn-primary {
    background: var(--accent-gold);
    color: white;
    box-shadow: 0 6px 15px rgba(212, 163, 115, 0.3);
}

.btn:hover {
    transform: translateY(-3px);
    background: #c29262;
    box-shadow: 0 10px 20px rgba(212, 163, 115, 0.4);
}

.cta h2 {
    margin-bottom: 20px;
    font-size: 2.2rem;
    color: var(--text-primary);
}

.cta p {
    margin-bottom: 40px;
    color: var(--text-secondary);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Technical Card Link */
.card-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.card-link:hover .card {
    border-color: var(--accent-gold);
}

/* Exchange Cards */
.exchange-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(350px, 100%), 1fr));
    gap: 30px;
    margin-top: 20px;
}

.exchange-card {
    background: #ffffff;
    border-radius: 25px;
    padding: 40px;
    border: 2px solid #f0f0f0;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    transition: transform 0.3s, border-color 0.3s;
}

.exchange-card.featured {
    border-color: var(--accent-gold);
    background: #fffcf9;
}

.featured-badge {
    position: absolute;
    top: -15px;
    left: 40px;
    background: var(--accent-gold);
    color: white;
    padding: 5px 20px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 700;
}

.exch-info h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.exch-info p {
    margin-bottom: 25px;
    color: var(--text-secondary);
}

.check-list {
    list-style: none;
    margin-bottom: 30px;
}

.check-list li {
    margin-bottom: 10px;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.btn-full {
    width: 100%;
    text-align: center;
}

.btn-outline {
    background: white;
    color: var(--accent-gold);
    border: 2px solid var(--accent-gold);
}

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

/* Blog & Column Styles */
.blog-commentary {
    background: #fff9f0;
    border: 2px solid var(--accent-gold);
    border-radius: 20px;
    padding: 30px;
    margin: 30px 0;
    position: relative;
    display: flex;
    gap: 20px;
    align-items: flex-start;
}


.blog-commentary img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.blog-news-source {
    background: #f8f9fa;
    border-left: 4px solid #dee2e6;
    padding: 20px;
    margin: 20px 0;
    font-size: 0.95rem;
}

.blog-news-source h4 {
    margin-bottom: 10px;
    font-size: 1rem;
    color: var(--text-primary);
}

/* Archive Page Specific Styles */
#archiveSearch:focus {
    border-color: var(--accent-gold) !important;
}

.archive-month-group {
    margin-bottom: 20px;
    border: 1px solid #eee;
    border-radius: 10px;
    overflow: hidden;
    background: #fff;
    box-shadow: 0 4px 10px rgba(0,0,0,0.02);
}

.archive-month-header {
    width: 100%;
    padding: 15px 25px;
    background: #fdfaf0;
    border: none;
    border-bottom: 1px solid #eee;
    text-align: left;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s;
}

.archive-month-header:hover {
    background: #f8f4e6;
}

.archive-month-content {
    display: none;
    padding: 15px 20px;
}

.archive-group-open .archive-month-content {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.archive-month-content .news-item {
    border: none;
    border-bottom: 1px dashed #eee;
    border-radius: 0;
    box-shadow: none;
    padding: 15px 10px;
}

.archive-month-content .news-link:last-child .news-item {
    border-bottom: none;
}

/* Footer */
footer {
    padding: 60px 0;
    border-top: 1px solid #eee;
    background: #fcfaf7;
}

footer p {
    margin-bottom: 12px;
    color: var(--text-secondary);
}

footer a {
    color: var(--accent-gold);
    text-decoration: none;
    font-weight: 600;
}

/* Hamburger Button */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 6px;
    width: 44px;
    height: 44px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 0;
    z-index: 1100;
}

.hamburger span {
    display: block;
    width: 26px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 3px;
    transition: all 0.3s ease;
}

.hamburger.open span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}
.hamburger.open span:nth-child(2) {
    opacity: 0;
}
.hamburger.open span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

/* Mobile Drawer Nav - PC では完全非表示 */
.mobile-nav,
.mobile-overlay {
    display: none;
}

/* Responsive (Mobile) */
@media (max-width: 768px) {
    header ul {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    /* ドロワーナビ */
    .mobile-nav {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 0;
        right: 0;
        width: 75%;
        max-width: 300px;
        height: 100vh;
        background: rgba(252, 250, 247, 0.98);
        backdrop-filter: blur(10px);
        z-index: 1050;
        padding: 130px 30px 40px;
        gap: 10px;
        box-shadow: -5px 0 30px rgba(0, 0, 0, 0.15);
        border-left: 2px solid var(--accent-gold);
        /* 閉じた状態: 左側にスライドして避鮣 */
        transform: translateX(110%);
        transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .mobile-nav.open {
        transform: translateX(0);
    }

    .mobile-nav a {
        font-size: 1.1rem;
        font-weight: 700;
        color: var(--text-primary);
        text-decoration: none;
        padding: 16px 0;
        border-bottom: 1px solid #e8e0d8;
        transition: color 0.2s, padding-left 0.2s;
    }

    .mobile-nav a:last-child {
        border-bottom: none;
    }

    .mobile-nav a:hover {
        color: var(--accent-gold);
        padding-left: 8px;
    }

    /* オーバーレイ */
    .mobile-overlay {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.4);
        z-index: 1040;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.35s ease;
    }

    .mobile-overlay.open {
        opacity: 1;
        pointer-events: auto;
    }

    .news-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .hero {
        padding: 150px 0 60px;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

    .section-padding {
        padding: 50px 0;
    }

    /* もふねこ会話エリア: モバイルで縦並び */
    .character-say {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 20px;
        gap: 15px;
    }

    .bubble {
        text-align: left;
    }

    /* content-box: モバイルはパディングを縮小 */
    .content-box {
        padding: 25px 18px;
        border-radius: 20px;
    }

    .grid {
        grid-template-columns: 1fr;
    }
}

/* Lesson Hub Box Styles */
.lesson-hub-box {
    background: #ffffff;
    border: 2px solid var(--accent-gold);
    border-radius: 25px;
    padding: 30px;
    margin: 40px 0;
    box-shadow: 0 10px 30px rgba(212, 163, 115, 0.1);
    position: relative;
    display: flex;
    align-items: center;
    gap: 30px;
}

.lesson-hub-box::before {
    content: "🐾 もふねこのおすすめ講義";
    position: absolute;
    top: -15px;
    left: 20px;
    background: var(--accent-gold);
    color: white;
    padding: 2px 15px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 700;
}

.lesson-hub-icon {
    width: 70px;
    height: 70px;
    background: #fffcf0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    border: 1px solid var(--accent-gold);
    flex-shrink: 0;
}

.lesson-hub-content {
    flex: 1;
}

.lesson-hub-content h4 {
    margin-bottom: 8px;
    font-size: 1.2rem;
    color: var(--text-primary);
}

.lesson-hub-content p {
    font-size: 0.95rem;
    margin-bottom: 0;
    line-height: 1.6;
}

.lesson-hub-btn {
    flex-shrink: 0;
}

.pc-ad {
    display: block;
}

.sp-ad {
    display: none;
}

@media (max-width: 768px) {
    .lesson-hub-box {
        flex-direction: column;
        text-align: center;
        padding-top: 40px;
    }

    .lesson-hub-btn {
        width: 100%;
    }

    .pc-ad {
        display: none !important;
    }

    .sp-ad {
        display: block !important;
    }
}

/* --- News & Guide Detail Page Styles --- */
.news-detail-page main {
    padding-top: 140px;
    padding-bottom: 80px;
}

.news-article, .guide-container {
    background: white;
    padding: 60px;
    border-radius: 30px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.03);
    max-width: 900px;
    margin: 0 auto;
}

.news-meta {
    margin-bottom: 30px;
    display: flex;
    gap: 15px;
    align-items: center;
}

.news-article h1, .guide-container h1 {
    font-size: 2.2rem;
    color: var(--text-primary);
    line-height: 1.4;
    margin-bottom: 40px;
}

.news-body, .guide-container {
    color: var(--text-primary);
    font-size: 1.1rem;
    line-height: 2.0; /* 読みやすさ向上のため行間を拡大 */
}

.news-body p, .guide-container p {
    margin-bottom: 30px;
}

.news-body h2, .guide-container h2 {
    margin-top: 60px;
    margin-bottom: 25px;
    font-size: 1.6rem;
    border-left: 6px solid var(--accent-gold);
    padding-left: 20px;
}

.news-body h3, .guide-container h3 {
    margin-top: 40px;
    margin-bottom: 20px;
    font-size: 1.3rem;
}

.news-body ul, .news-body ol, .guide-container ul, .guide-container ol {
    margin-bottom: 30px;
    padding-left: 1.5rem;
}

.news-body li, .guide-container li {
    margin-bottom: 15px;
}

/* Commentary & Boxes */
.blog-commentary {
    display: flex;
    gap: 25px;
    background: #fffcf0;
    padding: 35px;
    border-radius: 20px;
    border: 1px solid #ffeeba;
    margin: 40px 0;
    align-items: flex-start;
    position: relative;
}


.blog-commentary p {
    margin-bottom: 0 !important;
}

/* Alert & Info Cards */
.alert-box {
    background: #fff0f0;
    padding: 30px;
    border-radius: 16px;
    border: 2px solid #e53e3e;
    margin: 35px 0;
}

.alert-box .alert-title {
    color: #c53030;
    font-weight: 700;
    margin-bottom: 15px;
    display: block;
}

.info-card {
    background: linear-gradient(135deg, #fffbea 0%, #fff8e1 100%);
    border: 1px solid #f5c842;
    border-radius: 16px;
    padding: 30px;
    margin: 35px 0;
}

.info-card .card-title {
    font-weight: 700;
    color: #b8860b;
    margin-bottom: 15px;
    display: block;
}

/* Links */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 50px;
    color: var(--accent-gold);
    text-decoration: none;
    font-weight: 700;
    transition: color 0.3s;
}

.back-link:hover {
    color: #c29262;
    text-decoration: underline;
}

.source-credit {
    margin-top: 60px;
    padding-top: 30px;
    border-top: 1px solid #eee;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

@media (max-width: 768px) {
    /* ニュース記事ページ: モバイルではヘッダー分だけ確保 */
    .news-detail-page main {
        padding-top: 130px;
    }

    .news-article, .guide-container {
        padding: 25px 16px;
        border-radius: 0;
    }
    
    .news-article h1, .guide-container h1 {
        font-size: 1.5rem;
    }
    
    .blog-commentary {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 30px 20px;
    }

    /* blog-commentary内のテキストは左寄せに */
    .blog-commentary div {
        text-align: left;
        width: 100%;
    }

    /* exchange-card: モバイルでは padding を縮小 */
    .exchange-card {
        padding: 28px 20px;
    }
}