/* リセットとベーススタイル */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Hiragino Sans', 'ヒラギノ角ゴシック', 'Yu Gothic', '游ゴシック', 'Meiryo', 'メイリオ', sans-serif;
    line-height: 1.7;
    color: #333;
    background-color: #ffffff;
}

/* ヘッダー */
header {
    background-color: #ffffff;
    border-bottom: 2px solid #16327B;
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 4px rgba(22, 50, 123, 0.1);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.logo-link {
    display: inline-block;
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.logo-link:hover {
    opacity: 0.8;
}

.logo {
    height: 60px;
    width: auto;
}

/* メインコンテンツ */
main {
    width: 100%;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ヒーローセクション */
.hero {
    background: linear-gradient(135deg, #16327B 0%, #0f2459 100%);
    color: #ffffff;
    padding: 6rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 2rem;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
    color: #ffffff;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.8rem;
    font-weight: 300;
    margin-bottom: 2rem;
    color: #e8f0fe;
}

.hero-intro {
    max-width: 900px;
    margin: 0 auto 3rem auto;
    text-align: left;
}

.hero-intro p {
    font-size: 1.2rem;
    line-height: 1.8;
    margin-bottom: 2rem;
    color: #f0f4f8;
}

.hero-quote {
    margin: 2rem 0;
    padding: 2rem;
    background-color: rgba(255, 255, 255, 0.1);
    border-left: 4px solid #ffffff;
    border-radius: 0 8px 8px 0;
    font-style: italic;
    color: #ffffff;
    text-align: center;
}

.hero-quote p {
    font-size: 1.3rem;
    line-height: 1.6;
    margin: 0;
    font-weight: 500;
}

.hero-cta {
    margin-top: 3rem;
}

.cta-button {
    display: inline-block;
    background-color: #ffffff;
    color: #16327B;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.cta-button:hover {
    background-color: #f8f9fa;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* アプローチセクション */
.approach-section {
    padding: 4rem 0 4rem 0;
    background-color: #ffffff;
}

.approach-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.approach-content h2 {
    color: #16327B;
    font-size: 2.5rem;
    margin-bottom: 2rem;
}

.approach-content p {
    font-size: 1.2rem;
    line-height: 1.8;
    color: #555;
    margin-bottom: 1.5rem;
}

/* クリーンな活用セクション */
.clean-usage-section {
    padding: 4rem 0 4rem 0;
    background-color: #f8f9fa;
}

.clean-usage-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.clean-usage-content h2 {
    color: #16327B;
    font-size: 2.5rem;
    margin-bottom: 2rem;
}

.clean-usage-content p {
    font-size: 1.2rem;
    line-height: 1.8;
    color: #555;
    margin-bottom: 1.5rem;
}

.principles {
    margin: 2rem 0;
    padding-left: 0;
    list-style: none;
    text-align: left;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.principles li {
    margin-bottom: 1rem;
    font-size: 1.3rem;
    font-weight: bold;
    color: #16327B;
    padding: 1rem;
    background-color: #ffffff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(22, 50, 123, 0.1);
    position: relative;
    padding-left: 3rem;
}

.principles li::before {
    content: '✓';
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #16327B;
    font-weight: bold;
    font-size: 1.2rem;
}

/* 私たちの立場セクション */
.our-position-section {
    padding: 4rem 0 4rem 0;
    background-color: #ffffff;
}

.our-position-section h2 {
    text-align: center;
    font-size: 2.5rem;
    color: #16327B;
    margin-bottom: 2rem;
}

.position-intro {
    text-align: center;
    font-size: 1.2rem;
    color: #555;
    margin-bottom: 4rem;
}

.position-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.position-card {
    background-color: #f8f9fa;
    padding: 2.5rem 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(22, 50, 123, 0.1);
    transition: all 0.3s ease;
    border-top: 4px solid #16327B;
}

.position-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(22, 50, 123, 0.15);
}

.position-card h3 {
    color: #16327B;
    font-size: 1.4rem;
    margin-bottom: 1rem;
    font-weight: bold;
}

.position-card p {
    color: #555;
    line-height: 1.6;
    margin: 0;
    font-size: 1.1rem;
}

/* 教育現場セクション */
.education-section {
    padding: 4rem 0 4rem 0;
    background-color: #f8f9fa;
}

.education-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.education-content h2 {
    color: #16327B;
    font-size: 2.5rem;
    margin-bottom: 2rem;
}

.education-content p {
    font-size: 1.2rem;
    line-height: 1.8;
    color: #555;
    margin-bottom: 2rem;
}

.highlight-quote {
    margin: 3rem 0;
    padding: 2.5rem;
    background-color: #ffffff;
    border-left: 6px solid #16327B;
    border-radius: 0 12px 12px 0;
    font-style: italic;
    color: #16327B;
    text-align: center;
    box-shadow: 0 4px 20px rgba(22, 50, 123, 0.1);
}

.highlight-quote p {
    font-size: 1.4rem;
    line-height: 1.6;
    margin: 0;
    font-weight: bold;
}

/* おわりにセクション */
.conclusion-section {
    padding: 6rem 0;
    background-color: #ffffff;
}

.conclusion-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.conclusion-content h2 {
    color: #16327B;
    font-size: 2.5rem;
    margin-bottom: 2rem;
}

.conclusion-content p {
    font-size: 1.2rem;
    line-height: 1.8;
    color: #555;
    margin-bottom: 1.5rem;
}

/* タイトルと日付 */
h1 {
    color: #16327B;
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.date {
    color: #666;
    font-size: 1rem;
    margin-bottom: 2rem;
    font-style: italic;
}

/* イントロ部分 */
.intro {
    margin-bottom: 3rem;
    padding: 2rem;
    background-color: #f8f9fa;
    border-left: 4px solid #16327B;
    border-radius: 0 8px 8px 0;
}

.intro p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

/* 引用 */
blockquote {
    margin: 2rem 0;
    padding: 1.5rem;
    background-color: #ffffff;
    border-left: 4px solid #16327B;
    border-radius: 0 8px 8px 0;
    font-style: italic;
    color: #555;
}

blockquote.highlight {
    background-color: #e8f0fe;
    border-left-color: #16327B;
    font-weight: bold;
    text-align: center;
    font-size: 1.2rem;
}

/* 目次 */
.toc {
    margin-bottom: 3rem;
    padding: 2rem;
    background-color: #f8f9fa;
    border-radius: 8px;
}

.toc h2 {
    color: #16327B;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.toc ul {
    list-style: none;
}

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

.toc a {
    color: #16327B;
    text-decoration: none;
    padding: 0.5rem 1rem;
    display: block;
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

.toc a:hover {
    background-color: #e8f0fe;
}

/* セクション */
section {
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid #e0e0e0;
}

section:last-of-type {
    border-bottom: none;
}

h2 {
    color: #16327B;
    font-size: 2rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #16327B;
}

h3 {
    color: #16327B;
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

/* 原則リスト */
.principles {
    margin: 1.5rem 0;
    padding-left: 2rem;
}

.principles li {
    margin-bottom: 0.8rem;
    font-size: 1.1rem;
    font-weight: bold;
    color: #16327B;
}

/* 立場グリッド */
.position-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.position-item {
    background-color: #f8f9fa;
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid #16327B;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.position-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(22, 50, 123, 0.15);
}

.position-item h3 {
    margin-bottom: 1rem;
    color: #16327B;
}

.position-item p {
    margin-bottom: 0;
    font-size: 1rem;
}

/* 参考資料セクション */
.references-section {
    padding: 6rem 0;
    background-color: #f8f9fa;
}

/* 参考リンクのスタイル */
.reference-link {
    color: #16327B;
    text-decoration: none;
    font-size: 0.9rem;
    display: inline-block;
    margin-top: 0.5rem;
    padding: 0.25rem 0.5rem;
    background: rgba(22, 50, 123, 0.1);
    border-radius: 4px;
    transition: all 0.3s ease;
    border-left: 3px solid #16327B;
}

.reference-link:hover {
    background: rgba(22, 50, 123, 0.2);
    transform: translateX(4px);
    text-decoration: none;
    color: #0f2561;
}

.references-section h2 {
    text-align: center;
    font-size: 2.5rem;
    color: #16327B;
    margin-bottom: 4rem;
}

.reference-content {
    max-width: 1000px;
    margin: 0 auto;
}

.reference-content > p {
    text-align: center;
    font-size: 1.2rem;
    color: #555;
    margin-bottom: 3rem;
}

.reference-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.reference-item {
    background-color: #ffffff;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(22, 50, 123, 0.1);
    transition: all 0.3s ease;
    border-left: 4px solid #16327B;
}

.reference-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(22, 50, 123, 0.15);
}

.reference-item h3 {
    color: #16327B;
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    font-weight: bold;
}

.reference-item ul {
    margin: 0;
    padding-left: 1.5rem;
}

.reference-item li {
    margin-bottom: 0.8rem;
    font-size: 0.95rem;
    line-height: 1.6;
    color: #555;
}

.reference-item strong {
    color: #16327B;
    font-weight: bold;
}

.reference-note {
    font-style: italic;
    color: #666;
    font-size: 1rem;
    margin-top: 2rem;
    padding: 2rem;
    background-color: #ffffff;
    border-radius: 8px;
    border-left: 4px solid #16327B;
    text-align: center;
    box-shadow: 0 2px 10px rgba(22, 50, 123, 0.1);
}

/* フッター */
footer {
    background-color: #16327B;
    color: #ffffff;
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.4rem;
    }
    
    .hero-intro p {
        font-size: 1.1rem;
    }
    
    .hero-quote p {
        font-size: 1.1rem;
    }
    
    .approach-content h2,
    .clean-usage-content h2,
    .our-position-section h2,
    .education-content h2,
    .conclusion-content h2,
    .references-section h2 {
        font-size: 2rem;
    }
    
    .position-grid,
    .reference-grid {
        grid-template-columns: 1fr;
    }
    
    .position-card,
    .reference-item {
        padding: 2rem 1.5rem;
    }
    
    .principles li {
        font-size: 1.1rem;
        padding: 0.8rem;
        padding-left: 2.5rem;
    }
    
    .highlight-quote p {
        font-size: 1.2rem;
    }
    
    .header-container {
        padding: 0 1rem;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    .hero {
        padding: 4rem 0;
    }
    
    .approach-section,
    .clean-usage-section,
    .our-position-section,
    .education-section,
    .conclusion-section,
    .references-section {
        padding: 4rem 0;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .hero-quote p {
        font-size: 1rem;
    }
    
    .logo {
        height: 50px;
    }
    
    .position-card,
    .reference-item {
        padding: 1.5rem 1rem;
    }
    
    .principles li {
        font-size: 1rem;
        padding: 0.7rem;
        padding-left: 2.2rem;
    }
    
    .highlight-quote p {
        font-size: 1.1rem;
    }
    
    .cta-button {
        padding: 0.8rem 2rem;
        font-size: 1rem;
    }
}

/* アニメーション */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.main-content {
    animation: fadeInUp 0.6s ease-out;
}

/* スクロール時のスムーズな動作 */
html {
    scroll-behavior: smooth;
}

/* フォーカス時のアクセシビリティ */
a:focus,
button:focus {
    outline: 2px solid #16327B;
    outline-offset: 2px;
}

/* 選択時の色 */
::selection {
    background-color: #16327B;
    color: #ffffff;
}

/* 画像表示コンテナ */
.image-display-container {
    margin: 2rem 0 1rem 0;
    padding: 1.5rem;
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(22, 50, 123, 0.1);
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

/* スライドショーコンテナ */
.slideshow-container {
    position: relative;
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(22, 50, 123, 0.15);
}

.slideshow-wrapper {
    position: relative;
    width: 100%;
    height: 300px;
    overflow: hidden;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: stretch;
    justify-content: center;
    background: #ffffff;
}

.slide.active {
    opacity: 1;
    transform: translateX(0);
}

.slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px;
}

/* スライドショーコントロール */
.slideshow-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem;
    background: rgba(22, 50, 123, 0.05);
    border-top: 1px solid rgba(22, 50, 123, 0.1);
}

.prev-btn,
.next-btn {
    background: #16327B;
    color: white;
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 1px 4px rgba(22, 50, 123, 0.3);
}

.prev-btn:hover,
.next-btn:hover {
    background: #0f2561;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(22, 50, 123, 0.4);
}

.prev-btn:active,
.next-btn:active {
    transform: translateY(0);
}

.prev-btn:disabled,
.next-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* スライドインジケーター */
.slide-indicators {
    display: flex;
    gap: 0.3rem;
    align-items: center;
}

.indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    border: 1px solid #16327B;
    background: transparent;
    cursor: pointer;
    transition: all 0.3s ease;
}

.indicator.active {
    background: #16327B;
    transform: scale(1.2);
}

.indicator:hover {
    background: rgba(22, 50, 123, 0.5);
    transform: scale(1.1);
}

/* スライドショーアニメーション */
@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideOutRight {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

@keyframes slideOutLeft {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(-100%);
    }
}

.image-wrapper {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.image-title {
    font-size: 1.8rem;
    font-weight: bold;
    color: #16327B;
    margin-bottom: 0.5rem;
    text-shadow: 0 2px 4px rgba(22, 50, 123, 0.1);
}

.image-description {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 2rem;
    font-style: italic;
}

.image-gallery {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.image-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(22, 50, 123, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
    background: #ffffff;
    padding: 1rem;
}

.image-item:hover {
    transform: scale(1.05) translateY(-5px);
    box-shadow: 0 10px 30px rgba(22, 50, 123, 0.2);
}

.image-item img {
    width: 100%;
    height: auto;
    max-width: 300px;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.image-item:hover img {
    transform: scale(1.02);
}

/* モーダル表示 */
.image-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
    background: #ffffff;
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 2rem;
    color: #666;
    cursor: pointer;
    z-index: 1001;
    transition: color 0.3s ease;
}

.modal-close:hover {
    color: #16327B;
}

.modal-content img {
    max-width: 100%;
    max-height: 70vh;
    border-radius: 8px;
}

.modal-caption {
    margin-top: 1rem;
    text-align: center;
    color: #666;
    font-size: 1rem;
}

.modal-image-container {
    text-align: center;
    margin-bottom: 1rem;
}

.modal-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
}

.modal-action-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.5rem;
    background-color: #16327B;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: bold;
    transition: all 0.3s ease;
}

.modal-action-btn:hover {
    background-color: #0f2459;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(22, 50, 123, 0.3);
}

.modal-content {
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

/* アニメーション効果 */
@keyframes imageFadeIn {
    from {
        opacity: 0;
        transform: scale(0.8) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

@keyframes imageSlideIn {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.image-item {
    animation: imageFadeIn 0.6s ease forwards;
}

.image-item:nth-child(1) { animation-delay: 0.1s; }
.image-item:nth-child(2) { animation-delay: 0.2s; }
.image-item:nth-child(3) { animation-delay: 0.3s; }
.image-item:nth-child(4) { animation-delay: 0.4s; }

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .image-display-container {
        margin: 2rem 0;
        padding: 1.5rem;
    }
    
    .image-title {
        font-size: 1.5rem;
    }
    
    .image-description {
        font-size: 1rem;
    }
    
    .image-gallery {
        gap: 1rem;
    }
    
    .image-item {
        padding: 0.8rem;
    }
    
    .image-item img {
        max-width: 250px;
    }
    
    .modal-content {
        padding: 1.5rem;
        margin: 1rem;
    }
}

@media (max-width: 480px) {
    .image-display-container {
        margin: 1.5rem 0;
        padding: 1rem;
    }
    
    .image-title {
        font-size: 1.3rem;
    }
    
    .image-description {
        font-size: 0.9rem;
    }
    
    .image-gallery {
        flex-direction: column;
        gap: 1rem;
    }
    
    .image-item img {
        max-width: 200px;
    }
}

/* ソフトバンクスタイルの装飾 */
.image-display-container::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, #16327B, #0f2459, #16327B);
    border-radius: 18px;
    z-index: -1;
    opacity: 0.1;
}

.image-item::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(22, 50, 123, 0.05) 0%, transparent 50%);
    border-radius: 12px;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.image-item:hover::after {
    opacity: 0;
}