/* リセットとベース設定 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: '游明朝', 'Yu Mincho', '游明朝体', 'YuMincho', 'Hiragino Mincho Pro', 'MS P明朝', serif;
    line-height: 1.8;
    color: #e8e8e8;
    background-color: #111111;
}

/* ヘッダー */
header {
    background: #000000;
    color: white;
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(255,255,255,0.1);
    border-bottom: 1px solid #333333;
}

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

nav h1 {
    font-size: 2rem;
    font-weight: 500;
    letter-spacing: 1px;
}

nav h1 a {
    color: #ffffff;
    text-decoration: none;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 1.5rem;
}

nav a {
    color: #cccccc;
    text-decoration: none;
    transition: all 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: 4px;
}

nav a:hover, nav a.active {
    color: #ffd700;
    border-bottom: 2px solid #ffd700;
    background-color: rgba(255, 215, 0, 0.1);
}

/* ハンバーガーメニューボタン */
.hamburger {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: #ffffff;
    margin: 3px 0;
    transition: all 0.3s ease;
    border-radius: 3px;
}

.hamburger.active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

/* メインコンテンツ */
main {
    margin-top: 80px;
    padding: 2rem;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

/* ページヘッダー */
.page-header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 3rem 0;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 50%, #404040 100%);
    color: white;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.5);
    border: 1px solid #444444;
}

.page-header h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 300;
    letter-spacing: 2px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.7);
    color: #ffd700;
}

.page-header p {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
    color: #cccccc;
}

/* ヒーローセクション（トップページ） */
.hero {
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 50%, #404040 100%);
    color: white;
    padding: 4rem 2rem;
    border-radius: 15px;
    margin-bottom: 4rem;
    box-shadow: 0 8px 20px rgba(0,0,0,0.5);
    border: 1px solid #444444;
}

.hero-content {
    display: flex;
    align-items: center;
    gap: 3rem;
    max-width: 1000px;
    margin: 0 auto;
}

.profile-photo {
    flex-shrink: 0;
    position: relative;
}

.profile-photo img {
    width: 250px;
    height: 300px;
    object-fit: cover;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.7);
    border: 2px solid #444444;
}

.photo-placeholder {
    width: 250px;
    height: 300px;
    background: rgba(255,255,255,0.1);
    border: 2px dashed rgba(255,255,255,0.3);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    backdrop-filter: blur(5px);
    color: #cccccc;
}

.hero-text h1 {
    font-size: 3.5rem;
    margin-bottom: 0.5rem;
    font-weight: 300;
    letter-spacing: 3px;
    color: #ffd700;
}

.hero-text .title {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
    color: #ffd700;
    font-weight: 600;
}

.hero-text .subtitle {
    font-size: 1rem;
    margin-bottom: 1.5rem;
    opacity: 0.8;
    color: #cccccc;
}

.hero-text .description {
    font-size: 1.1rem;
    line-height: 1.7;
    opacity: 0.9;
    color: #e8e8e8;
}

/* セクション */
section {
    margin-bottom: 4rem;
    padding: 2rem 0;
}

h2 {
    font-size: 2.2rem;
    margin-bottom: 1.5rem;
    color: #ffd700;
    text-align: center;
    position: relative;
    padding-bottom: 1rem;
}

h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: linear-gradient(135deg, #ffd700, #ffed4e);
    border-radius: 2px;
}

h3 {
    color: #ffd700;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

h4 {
    color: #cccccc;
    margin: 1.5rem 0 0.8rem;
    font-size: 1.1rem;
    border-left: 4px solid #ffd700;
    padding-left: 1rem;
}

/* ページリンク */
.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.link-card {
    background: #1a1a1a;
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
    text-decoration: none;
    color: inherit;
    border-left: 5px solid #ffd700;
    border: 1px solid #333333;
    position: relative;
    overflow: hidden;
}

.link-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.5);
    border-color: #ffd700;
    background: #222222;
}

.card-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    text-align: center;
}

.card-arrow {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    font-size: 1.5rem;
    color: #ffd700;
    transition: transform 0.3s ease;
}

.link-card:hover .card-arrow {
    transform: translateX(5px);
}

/* ニュースセクション */
.recent-news {
    background: #1a1a1a;
    padding: 3rem;
    border-radius: 15px;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
    border: 1px solid #333333;
}

.news-preview {
    display: grid;
    gap: 1.5rem;
    margin-top: 2rem;
}

.news-item {
    padding: 1.5rem;
    border-left: 4px solid #ffd700;
    background: #222222;
    border-radius: 0 8px 8px 0;
    transition: all 0.3s ease;
    border: 1px solid #333333;
}

.news-item:hover {
    background: #2a2a2a;
    border-left-color: #ffed4e;
}

.news-item time {
    font-size: 0.9rem;
    color: #888888;
    font-weight: 600;
}

.news-item h3 {
    margin: 0.5rem 0;
    color: #e8e8e8;
}

.news-item h3 a {
    color: #ffffff;
    text-decoration: none;
    transition: color 0.3s ease;
}

.news-item h3 a:hover {
    color: #ffd700;
}

.news-more {
    text-align: center;
    margin-top: 2rem;
}

.more-link {
    display: inline-block;
    padding: 0.8rem 2rem;
    background: linear-gradient(135deg, #ffd700, #ffed4e);
    color: #000000;
    text-decoration: none;
    border-radius: 25px;
    transition: all 0.3s ease;
    font-weight: 600;
}

.more-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(255, 215, 0, 0.4);
}

/* About section */
.about-brief {
    background: #1a1a1a;
    padding: 3rem;
    border-radius: 15px;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
    border: 1px solid #333333;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 2rem;
}

.about-text ul, .major-works ul {
    list-style-type: none;
    padding-left: 0;
}

.about-text li, .major-works li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    border-bottom: 1px solid #333333;
    color: #cccccc;
}

.about-text li:before, .major-works li:before {
    content: '▶';
    position: absolute;
    left: 0;
    color: #ffd700;
}

/* ニュースページ */
.news-categories {
    margin-bottom: 2rem;
}

.category-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 0.8rem 1.5rem;
    background: #1a1a1a;
    border: 2px solid #ffd700;
    color: #ffd700;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
    font-weight: 600;
}

.tab-btn.active, .tab-btn:hover {
    background: #ffd700;
    color: #000000;
}

.news-list {
    display: grid;
    gap: 2rem;
}

.news-article {
    background: #1a1a1a;
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
    border: 1px solid #333333;
}

.news-article:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
}

.news-date {
    display: inline-block;
    background: #ffd700;
    color: #000000;
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.news-content h2 {
    text-align: left;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
}

.news-content h2::after {
    display: none;
}

.news-content h2 a {
    color: #e8e8e8;
    text-decoration: none;
    transition: color 0.3s ease;
}

.news-content h2 a:hover {
    color: #ffd700;
}

.news-category-tag {
    display: inline-block;
    padding: 0.2rem 0.8rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.news-category-tag.lectures {
    background: #4a9eff;
    color: white;
}

.news-category-tag.books {
    background: #50c878;
    color: white;
}

.news-category-tag.media {
    background: #ff6b6b;
    color: white;
}

.news-meta {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid #333333;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.news-meta span {
    background: #2a2a2a;
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.9rem;
    color: #cccccc;
    border: 1px solid #444444;
}

/* 地図ページ */
.maps-intro {
    background: #1a1a1a;
    padding: 3rem;
    border-radius: 15px;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
    margin-bottom: 3rem;
    border: 1px solid #333333;
}

/* Coming Soonセクション */
.coming-soon {
    background: #1a1a1a;
    padding: 4rem 3rem;
    border-radius: 15px;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
    text-align: center;
    border: 1px solid #333333;
}

.coming-soon-content {
    max-width: 800px;
    margin: 0 auto;
}

.coming-soon-icon {
    font-size: 5rem;
    margin-bottom: 2rem;
    opacity: 0.8;
}

.coming-soon h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: #ffd700;
}

.coming-soon > p {
    font-size: 1.3rem;
    margin-bottom: 3rem;
    color: #cccccc;
    line-height: 1.8;
}

.preview-topics {
    text-align: left;
    background: #222222;
    padding: 2.5rem;
    border-radius: 12px;
    margin: 3rem 0;
    border: 1px solid #333333;
}

.preview-topics h3 {
    text-align: center;
    margin-bottom: 2rem;
    color: #ffd700;
    font-size: 1.4rem;
}

.preview-topics ul {
    list-style-type: none;
    padding-left: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.preview-topics li {
    padding: 0.8rem 1rem;
    background: #2a2a2a;
    border-radius: 8px;
    border-left: 4px solid #ffd700;
    color: #cccccc;
    transition: all 0.3s ease;
}

.preview-topics li:hover {
    background: #333333;
    transform: translateX(5px);
}

.notification {
    background: #2a2a2a;
    padding: 1.5rem;
    border-radius: 10px;
    border: 2px solid #ffd700;
    margin-top: 3rem;
}

.notification p {
    margin: 0;
    color: #e8e8e8;
    font-size: 1.1rem;
}

.notification a {
    color: #ffd700;
    text-decoration: none;
    font-weight: 600;
}

.notification a:hover {
    color: #ffed4e;
    text-decoration: underline;
}

.maps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.map-card {
    background: #1a1a1a;
    border-radius: 15px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
    cursor: pointer;
    overflow: hidden;
    border: 1px solid #333333;
}

.map-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.5);
}

.map-image {
    height: 200px;
    position: relative;
    overflow: hidden;
}

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

.map-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 50%, #404040 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
}

.map-icon {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

.map-placeholder h3 {
    color: #ffd700;
    font-size: 1.2rem;
    text-align: center;
}

.map-info {
    padding: 1.5rem;
}

.map-info h3 {
    color: #ffd700;
    margin-bottom: 0.8rem;
}

.map-info p {
    color: #cccccc;
}

.map-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.tag {
    background: #ffd700;
    color: #000000;
    padding: 0.2rem 0.6rem;
    border-radius: 10px;
    font-size: 0.8rem;
    font-weight: 600;
}

.maps-legend {
    background: #1a1a1a;
    padding: 3rem;
    border-radius: 15px;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
    margin-top: 3rem;
    border: 1px solid #333333;
}

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

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.8rem;
    background: #222222;
    border-radius: 8px;
    border: 1px solid #333333;
    color: #cccccc;
}

.legend-color {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    flex-shrink: 0;
}

.legend-line {
    width: 30px;
    height: 3px;
    background: #cccccc;
    position: relative;
    flex-shrink: 0;
}

.legend-line::after {
    content: '';
    position: absolute;
    right: -3px;
    top: -2px;
    width: 0;
    height: 0;
    border-left: 6px solid #cccccc;
    border-top: 3px solid transparent;
    border-bottom: 3px solid transparent;
}

/* お問い合わせページ */
.contact-info-section {
    background: #1a1a1a;
    padding: 3rem;
    border-radius: 15px;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
    margin-bottom: 3rem;
    border: 1px solid #333333;
}

.contact-types {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.contact-type {
    padding: 1.5rem;
    border: 2px solid #ffd700;
    border-radius: 12px;
    background: #222222;
}

.contact-type h3 {
    color: #ffd700;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.contact-type ul {
    list-style-type: none;
    padding-left: 0;
}

.contact-type li {
    padding: 0.3rem 0;
    padding-left: 1.2rem;
    position: relative;
    font-size: 0.95rem;
    color: #cccccc;
}

.contact-type li:before {
    content: '•';
    position: absolute;
    left: 0;
    color: #ffd700;
    font-weight: bold;
}

.contact-form-section {
    background: #1a1a1a;
    padding: 3rem;
    border-radius: 15px;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
    margin-bottom: 3rem;
    border: 1px solid #333333;
}

.contact-form {
    max-width: 800px;
    margin: 2rem auto 0;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.8rem;
    font-weight: 600;
    color: #cccccc;
    font-size: 1rem;
}

.required {
    color: #ff6b6b;
    font-weight: bold;
}

.form-group input, .form-group textarea, .form-group select {
    width: 100%;
    padding: 1rem;
    border: 2px solid #333333;
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease;
    background-color: #222222;
    color: #e8e8e8;
}

.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
    outline: none;
    border-color: #ffd700;
    box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.1);
}

.form-group textarea {
    height: 150px;
    resize: vertical;
}

.form-group select {
    cursor: pointer;
}

.privacy-agreement {
    margin: 2rem 0;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    cursor: pointer;
    color: #cccccc;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin: 0;
}

.checkbox-label a {
    color: #4a9eff;
    text-decoration: underline;
}

.checkbox-label a:hover {
    color: #6bb6ff;
}

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

.submit-btn {
    background: linear-gradient(135deg, #ffd700, #ffed4e);
    color: #000000;
    padding: 1rem 3rem;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(255, 215, 0, 0.3);
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(255, 215, 0, 0.4);
}

.submit-note {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: #888888;
}

.contact-notes {
    background: #1a1a1a;
    padding: 3rem;
    border-radius: 15px;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
    border: 1px solid #333333;
}

.notes-content ul {
    list-style-type: none;
    padding-left: 0;
    margin-top: 1rem;
}

.notes-content li {
    padding: 0.8rem 0;
    padding-left: 2rem;
    position: relative;
    border-bottom: 1px solid #333333;
    line-height: 1.6;
    color: #cccccc;
}

.notes-content li:before {
    content: '⚠️';
    position: absolute;
    left: 0;
    top: 0.8rem;
}

/* フッター */
footer {
    background: #000000;
    color: white;
    text-align: center;
    padding: 3rem 2rem;
    margin-top: 4rem;
    border-top: 1px solid #333333;
}

footer p {
    margin-bottom: 0.5rem;
    opacity: 0.9;
}

footer p:last-child {
    font-size: 0.9rem;
    opacity: 0.7;
    color: #888888;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    nav {
        padding: 0 1rem;
    }

    nav h1 {
        font-size: 1.3rem;
    }

    /* ハンバーガーボタンを表示 */
    .hamburger {
        display: flex;
    }

    /* メニューをデフォルトで非表示 */
    nav .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: #000000;
        width: 100%;
        text-align: center;
        transition: left 0.3s ease;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.5);
        border-top: 1px solid #333333;
        padding: 2rem 0;
        gap: 0;
    }

    nav .nav-menu.active {
        left: 0;
    }

    nav .nav-menu li {
        padding: 1rem 0;
        border-bottom: 1px solid #333333;
    }

    nav .nav-menu li:last-child {
        border-bottom: none;
    }

    nav .nav-menu a {
        display: block;
        width: 100%;
        padding: 0.5rem 1rem;
    }

    main {
        padding: 1rem;
        margin-top: 80px;
    }
    
    .page-header h1, .hero-text h1 {
        font-size: 2rem;
    }
    
    .page-header p, .hero-text .description {
        font-size: 1rem;
    }
    
    .hero {
        padding: 3rem 1rem;
    }
    
    .hero-content {
        flex-direction: column;
        text-align: center;
        gap: 2rem;
    }
    
    .profile-photo img, .photo-placeholder {
        width: 200px;
        height: 240px;
    }
    
    .links-grid, .maps-grid, .contact-types, .about-content {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
    
    .contact-info-section, .contact-form-section, .contact-notes, 
    .maps-intro, .recent-news, .about-brief, .coming-soon {
        padding: 2rem 1.5rem;
    }
    
    h2 {
        font-size: 1.8rem;
    }
    
    .category-tabs {
        gap: 0.5rem;
    }
    
    .tab-btn {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }
    
    .coming-soon-icon {
        font-size: 4rem;
    }
    
    .coming-soon h2 {
        font-size: 2rem;
    }
    
    .preview-topics ul {
        grid-template-columns: 1fr;
    }
    
    .preview-topics {
        padding: 2rem 1.5rem;
    }
}

@media (max-width: 480px) {
    .hero-text h1 {
        font-size: 1.8rem;
        letter-spacing: 1px;
    }
    
    .page-header h1 {
        font-size: 1.8rem;
        letter-spacing: 1px;
    }
    
    .news-meta {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .legend-content {
        grid-template-columns: 1fr;
    }
    
    .map-card {
        min-width: auto;
    }
    
    .coming-soon-icon {
        font-size: 3rem;
    }
    
    .coming-soon h2 {
        font-size: 1.8rem;
    }
    
    .coming-soon > p {
        font-size: 1.1rem;
    }
}

/* ニュース詳細ページ用スタイル */
.news-detail {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}

.news-detail header {
    position: static;
    background: none;
    box-shadow: none;
    border: none;
    padding: 0;
    margin-bottom: 2rem;
}

.news-detail main {
    margin-top: 0;
}

.detail-header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem 0;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 50%, #404040 100%);
    border-radius: 15px;
    border: 1px solid #444444;
}

.detail-header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 300;
    letter-spacing: 1px;
    color: #ffd700;
}

.detail-date {
    font-size: 1.1rem;
    color: #cccccc;
    margin-top: 1rem;
}

.detail-content {
    background: #1a1a1a;
    padding: 3rem;
    border-radius: 15px;
    border: 1px solid #333333;
    margin-bottom: 2rem;
}

.detail-content h2 {
    color: #ffd700;
    margin-bottom: 1.5rem;
    margin-top: 2rem;
    font-size: 1.8rem;
    border-bottom: 2px solid #ffd700;
    padding-bottom: 0.5rem;
}

.detail-content h2:first-child {
    margin-top: 0;
}

.detail-content h3 {
    color: #ffffff;
    margin-bottom: 1rem;
    margin-top: 1.5rem;
    font-size: 1.4rem;
}

.detail-info {
    display: grid;
    gap: 1.5rem;
    margin: 2rem 0;
}

.info-item {
    background: #222222;
    padding: 1.5rem;
    border-radius: 10px;
    border-left: 4px solid #ffd700;
}

.info-item h3 {
    color: #ffd700;
    margin: 0 0 0.5rem 0;
    font-size: 1.1rem;
}

.info-item p {
    margin: 0;
    color: #e8e8e8;
}

.external-link {
    margin: 2rem 0;
    text-align: center;
}

.external-link a {
    display: inline-block;
    background: #ffd700;
    color: #111111;
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.external-link a:hover {
    background: #ffed4e;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(255, 215, 0, 0.3);
}

.detail-navigation {
    text-align: center;
    margin: 2rem 0;
}

.back-link {
    display: inline-block;
    background: #333333;
    color: #ffffff;
    padding: 0.8rem 1.5rem;
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.back-link:hover {
    background: #444444;
    transform: translateY(-1px);
}

.lecture-image {
    text-align: center;
    margin: 2rem 0;
}

.lecture-image img {
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.5);
}

@media (max-width: 768px) {
    .news-detail {
        padding: 1rem;
    }
    
    .detail-content {
        padding: 2rem 1.5rem;
    }
    
    .detail-header h1 {
        font-size: 2rem;
    }
    
    .info-item {
        padding: 1rem;
    }
}