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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    color: #ffffff;
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 10px;
}

/* ヘッダー */
.header {
    text-align: center;
    padding: 20px 20px 40px;
    margin-bottom: 50px;
}

.header h1 {
    font-size: 3.5rem;
    margin-bottom: 10px;
    background: linear-gradient(135deg, #ff6b6b 0%, #4ecdc4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

.header .subtitle {
    font-size: 1.3rem;
    color: #b0b0b0;
    font-weight: 300;
}

/* ポートフォリオグリッド */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 60px;
}

/* ポートフォリオブロック */
.portfolio-block {
    position: relative;
    cursor: pointer;
    height: 400px;
    border-radius: 15px;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(255, 107, 107, 0.1) 0%, rgba(78, 205, 196, 0.1) 100%);
    border: 2px solid rgba(255, 255, 255, 0.1);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.portfolio-block:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    border-color: rgba(255, 255, 255, 0.3);
}

/* デフォルト表示 */
.block-default {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, rgba(42, 42, 42, 0.9) 0%, rgba(60, 60, 60, 0.9) 100%);
    padding: 30px;
    text-align: center;
    z-index: 10;
    transition: opacity 0.4s ease, visibility 0.4s ease;
    opacity: 1;
    visibility: visible;
}

.portfolio-block:hover .block-default {
    opacity: 0;
    visibility: hidden;
}

.block-default h2 {
    font-size: 2rem;
    margin-bottom: 15px;
    background: linear-gradient(135deg, #ff6b6b 0%, #4ecdc4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.block-default p {
    font-size: 1.1rem;
    color: #b0b0b0;
}

/* コンテンツ表示 */
.block-content {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    padding: 20px;
    background: linear-gradient(135deg, rgba(26, 26, 26, 0.98) 0%, rgba(45, 45, 45, 0.98) 100%);
    overflow-y: auto;
    z-index: 5;
    transition: opacity 0.4s ease, visibility 0.4s ease;
    opacity: 0;
    visibility: hidden;
}

.portfolio-block:hover .block-content {
    opacity: 1;
    visibility: visible;
}

/* 作品グリッド */
.works-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 10px;
}

.work-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    animation: fadeInUp 0.5s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 作品サムネイル */
.work-thumbnail {
    width: 100%;
    max-width: 300px;
    height: auto;
    border-radius: 8px;
    object-fit: cover;
    border: 2px solid rgba(255, 255, 255, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.work-thumbnail:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 30px rgba(255, 107, 107, 0.3);
}

/* 動画 */
.work-video {
    width: 100%;
    max-width: 300px;
    height: auto;
    border-radius: 8px;
    border: 2px solid rgba(255, 255, 255, 0.1);
    background: #000;
}

/* 作品タイトル */
.work-title {
    font-size: 0.95rem;
    color: #e0e0e0;
    text-align: center;
    font-weight: 500;
}

/* デザインブロック特有 */
.design-content .works-grid {
    grid-template-columns: 1fr;
}

.design-content .work-item {
    flex-direction: column;
}

/* アニメーション・プラグインブロック特有 */
.animation-content .works-grid,
.plugin-content .works-grid {
    grid-template-columns: 1fr;
}

/* フッター */
.footer {
    text-align: center;
    padding: 40px 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #808080;
    font-size: 0.95rem;
}

/* スクロールバーのスタイル */
.block-content::-webkit-scrollbar {
    width: 8px;
}

.block-content::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
}

.block-content::-webkit-scrollbar-thumb {
    background: rgba(255, 107, 107, 0.5);
    border-radius: 10px;
    transition: background 0.3s ease;
}

.block-content::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 107, 107, 0.8);
}

/* レスポンシブデザイン */
@media (max-width: 1024px) {
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .portfolio-block {
        height: 350px;
    }

    .header h1 {
        font-size: 2.5rem;
    }
}

@media (max-width: 768px) {
    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .portfolio-block {
        height: 300px;
    }

    .header {
        padding: 40px 20px 30px;
        margin-bottom: 30px;
    }

    .header h1 {
        font-size: 2rem;
    }

    .header .subtitle {
        font-size: 1rem;
    }

    .block-default h2 {
        font-size: 1.5rem;
    }

    .block-default p {
        font-size: 0.95rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 10px;
    }

    .header {
        padding: 30px 10px 20px;
        margin-bottom: 20px;
    }

    .header h1 {
        font-size: 1.5rem;
    }

    .portfolio-grid {
        gap: 15px;
    }

    .portfolio-block {
        height: 250px;
    }

    .block-default h2 {
        font-size: 1.2rem;
    }

    .work-title {
        font-size: 0.85rem;
    }
}

/* アクセシビリティ */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}