/**
 * @file top.css
 * @description トップページのスタイル定義
 * @summary
 *   - ヒーローセクション（背景スライドショー含む）
 *   - サイドパネル
 *   - プロフィールセクション
 *   - コンテンツカード
 *   - おすすめブログセクション
 *   - 最近の更新（サイドバー）
 * @recent_changes
 *   - ファイル先頭に説明コメントを追加
 */

/* ==========================================================================
   1. ヒーローセクション
   ========================================================================== */
.hero {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2.25rem;
    align-items: stretch;
    margin-bottom: 2.5rem;
}

.hero-main {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    padding: 3rem 2.5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    border: 1px solid var(--color-border);
    background:
        radial-gradient(
            circle at 80% 20%,
            rgba(var(--color-accent-rgb), 0.15) 0%,
            transparent 60%
        ),
        radial-gradient(
            circle at 0% 100%,
            rgba(var(--color-accent-dark-rgb), 0.1) 0%,
            transparent 50%
        ),
        var(--color-panel);
    box-shadow: var(--shadow-lg);
    isolation: isolate;
}

.hero-main::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background-image:
        radial-gradient(
            circle at 0% 0%,
            rgba(var(--color-accent), 0.2),
            transparent 40%
        ),
        radial-gradient(
            circle at 100% 100%,
            rgba(var(--color-accent-dark), 0.2),
            transparent 40%
        );
    pointer-events: none;
    z-index: 2;
}

/* グリッド + 斜めの動き */
.hero-main::before {
    content: "";
    position: absolute;
    inset: -40%;
    background-image:
        linear-gradient(
            to right,
            rgba(255, 255, 255, 0.1) 1px,
            transparent 1px
        ),
        linear-gradient(
            to bottom,
            rgba(255, 255, 255, 0.05) 1px,
            transparent 1px
        );
    background-size: 2rem 2rem;
    opacity: 0.4;
    mix-blend-mode: overlay;
    transform: translate3d(0, 0, 0) rotate(5deg);
    animation: hero-grid-shift 30s linear infinite;
}

.hero-main > * {
    position: relative;
    z-index: 1;
}

/* 背景スライドショー */
.hero-slideshow {
    position: absolute;
    inset: 0;
    z-index: -2;
    overflow: hidden;
    border-radius: inherit;
    pointer-events: none;
}

.hero-bg-overlay {
    position: absolute;
    inset: 0;
    z-index: -1;
    background: rgba(16, 18, 23, 0.8);
    border-radius: inherit;
    pointer-events: none;
    backdrop-filter: blur(2px);
}

.hero-slide {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transform: scale(1);
    transition:
        opacity 2s ease-in-out,
        transform 10s linear;
    will-change: opacity, transform;
}

.hero-slide.active {
    opacity: 1;
    transform: scale(1.1);
}

@keyframes hero-grid-shift {
    0% {
        transform: translate3d(0, 0, 0) rotate(5deg);
    }
    100% {
        transform: translate3d(40px, 40px, 0) rotate(5deg);
    }
}

.hero-main h1 {
    margin: 0 0 0.5rem;
    font-size: 2.5rem;
    line-height: 1.1;
    color: var(--color-heading);
}

.hero-main .hero-subtitle {
    margin: 0 0 1rem;
    color: var(--color-text-muted);
    font-size: 1.125rem;
}

.hero-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0;
}

.hero-badge {
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.hero-social {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.hero-social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-social-link:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    background: var(--color-panel);
    transform: translateY(-3px) scale(1.05);
    box-shadow: var(--shadow-glow);
}

.hero-actions {
    display: none;
}

/* ==========================================================================
   3. サイドパネル
   ========================================================================== */
.hero-side {
    background: var(--color-panel);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
}

.hero-side h2 {
    margin: 0 0 1rem;
    font-size: 1.5rem;
    color: var(--color-heading);
}

.home-latest {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
}

.home-latest-block {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    border: 1px solid var(--color-border-soft);
    box-shadow: var(--shadow-md);
    flex-grow: 1;
}

.home-latest-title {
    margin: 0 0 0.75rem;
    font-size: 1.2rem;
    color: var(--color-heading);
}

.home-latest-list {
    height: 400px;
    list-style: none;
    margin: 0;
    padding: 0;
    font-size: 0.95rem;
}

.home-latest-item + .home-latest-item {
    margin-top: 0.75rem;
}

.home-latest-link {
    text-decoration: none;
    color: var(--color-text);
    display: block;
    transition: var(--transition-smooth);
}

.home-latest-link:hover {
    color: var(--color-accent);
    transform: translateX(4px);
}

.home-latest-link-title {
    display: block;
    font-weight: 500;
    margin-bottom: 0.2rem;
}

.home-latest-link-meta {
    display: block;
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* ==========================================================================
   4. プロフィールセクション & Featuresセクション
   ========================================================================== */
.section--profile {
    margin-top: 2.5rem;
}

.profile-grid {
    display: grid;
    grid-template-columns: repeat(
        auto-fit,
        minmax(280px, 1fr)
    );
    gap: 1.25rem;
}

/* 共通カード（layout.css）への拡張 */
.card--profile {
    padding: 1.5rem;
}

/* カード内タイトル */
.card--profile .card__title,
.section--feature .card h3 {
    margin: 0 0 1rem;
    font-size: 1.3rem;
    color: var(--color-heading);
}

.profile-list {
    list-style: none;
    margin: 0 0 1rem;
    padding: 0;
    font-size: 1rem;
}

.profile-list li {
    display: flex;
    flex-direction: column;
    margin-bottom: 0.6rem;
}

.profile-label {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--color-text);
    margin-bottom: 0.2rem;
}

.profile-value {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.profile-note {
    margin: 1rem 0 0;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    line-height: 1.5;
}

.profile-tagset {
    margin-bottom: 0.8rem;
}

.profile-tagset-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: 0.4rem;
}

.profile-taglist {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.profile-tag {
    font-size: 0.8rem;
    padding: 0.25rem 0.7rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    background: var(--color-accent-soft);
    color: var(--color-text);
}

/* ==========================================================================
   5. レスポンシブデザイン
   ========================================================================== */
@media (max-width: 768px) {
    .hero {
        grid-template-columns: 1fr;
        gap: 2rem;
        margin-bottom: 2rem;
    }
    .hero-main {
        padding: 1.5rem;
    }
    .hero-main h1 {
        font-size: 2rem;
    }
    .hero-main .hero-subtitle {
        font-size: 1rem;
    }

    .hero-side {
        padding: 1.5rem;
    }
    .hero-side h2 {
        font-size: 1.3rem;
    }
    .home-latest {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    .home-latest-block {
        padding: 1rem;
    }
    .home-latest-title {
        font-size: 1.1rem;
        margin-bottom: 0.5rem;
    }
    .home-latest-list {
        font-size: 0.9rem;
    }
    .profile-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    .card--profile {
        padding: 1.2rem;
    }
    .card--profile .card__title {
        font-size: 1.15rem;
        margin-bottom: 0.8rem;
    }
    .profile-list {
        font-size: 0.95rem;
    }
    .profile-note {
        font-size: 0.8rem;
        margin-top: 0.8rem;
    }
    .profile-tagset-label {
        font-size: 0.8rem;
    }
    .profile-tag {
        font-size: 0.75rem;
        padding: 0.2rem 0.6rem;
    }
}

/* ==========================================================================
   6. トップ下のコンテンツカード
   ========================================================================== */
.section--top-grid .card-list {
    grid-template-columns: repeat(
        auto-fit,
        minmax(280px, 1fr)
    );
}

/* コンテンツカードのリンク化対応 */
.section--top-grid .card-list li {
    display: flex;
}

.card--link {
    display: flex;
    flex-direction: column;
    width: 100%;
    height: 100%;
    text-decoration: none;
    color: var(--color-text);
}

.card--link h3 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    color: var(--color-heading);
    transition: color 0.2s ease;
}

.card--link p {
    flex-grow: 1;
}

.card__more {
    margin-top: 1.25rem;
    color: var(--color-accent);
    font-weight: 600;
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    transition: transform 0.2s ease;
}

/* ホバー時の挙動 */
.card--link:hover h3 {
    color: var(--color-accent);
}

.card--link:hover .card__more {
    transform: translateX(6px);
    text-decoration: underline;
}

/* ==========================================================================
   7. おすすめブログセクション
   ========================================================================== */
.section--recommend {
    margin-top: 3rem;
    margin-bottom: 3rem;
}

/* ==========================================================================
   8. 最近の更新（サイドバー）
   ========================================================================== */
.home-latest-item {
    height: 30%;
    background: var(--color-surface);
    border: 1px solid var(--color-border-soft);
    border-radius: var(--radius-md);
    padding: 1rem;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

.home-latest-item:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
    background: var(--color-panel);
}

.home-latest-link:hover {
    transform: none;
    color: inherit;
}

.home-latest-link-title {
    color: var(--color-heading);
    font-weight: 600;
    margin-bottom: 0.3rem;
}

.home-latest-item:hover .home-latest-link-title {
    color: var(--color-accent);
}

@property --mask-percent {
    syntax: "<percentage>";
    initial-value: 30%;
    inherits: false;
}

.home-latest-link-thumbnail {
    position: absolute;
    top: 0;
    right: 0;
    width: 40%;
    height: 100%;
    pointer-events: none;
    --mask-percent: 30%;

    mask-image: linear-gradient(
        to right,
        transparent var(--mask-percent),
        black 100%
    );
    -webkit-mask-image: linear-gradient(
        to right,
        transparent var(--mask-percent),
        black 100%
    );
    transition: --mask-percent 0.2s ease;
}

.home-latest-link-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.5;
    transition: opacity 0.2s ease;
}

.home-latest-item:hover .home-latest-link-thumbnail {
    --mask-percent: 10%;
}

.home-latest-item:hover .home-latest-link-thumbnail img {
    opacity: 1;
}