/* ==========================================================================
   Liquid Glass Effect
   ========================================================================== */

.card-glass {
    position: relative;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(12px) saturate(120%);
    -webkit-backdrop-filter: blur(12px) saturate(120%);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.4);
    box-shadow:
        0 8px 32px rgba(159, 161, 66, 0.08),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
    padding: var(--space-6);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.card-glass::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background: linear-gradient(135deg,
            rgba(255, 255, 255, 0.6),
            rgba(255, 255, 255, 0.1));
    -webkit-mask:
        linear-gradient(#fff 0 0) content-box,
        linear-gradient(#fff 0 0);
    mask:
        linear-gradient(#fff 0 0) content-box,
        linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

.card-glass:hover {
    transform: translateY(-4px);
    box-shadow:
        0 12px 48px rgba(159, 161, 66, 0.12),
        inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

/* 記事一覧のカードレイアウト */
.posts-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-6);
    margin-bottom: var(--space-8);
}

@media (min-width: 768px) {
    .posts-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .posts-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.posts-grid article {
    display: flex;
    flex-direction: column;
}

.posts-grid .post-thumbnail {
    margin-bottom: var(--space-4);
    border-radius: 8px;
    overflow: hidden;
}

.posts-grid .post-thumbnail img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.3s ease;
}

.posts-grid article:hover .post-thumbnail img {
    transform: scale(1.05);
}

.posts-grid .entry-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-2);
}

.posts-grid .entry-title a {
    color: var(--color-text-primary);
    text-decoration: none;
}

.posts-grid .entry-title a::after {
    display: none;
}

.posts-grid .entry-title a:hover {
    color: var(--color-accent);
}

.posts-grid .entry-meta {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-3);
}

.posts-grid .entry-summary {
    flex-grow: 1;
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-text-secondary);
}

.posts-grid .entry-footer {
    margin-top: var(--space-4);
    padding-top: var(--space-3);
    border-top: 1px solid var(--color-border-light);
    font-size: var(--font-size-sm);
}

.posts-grid .cat-links a {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(159, 161, 66, 0.1);
    border-radius: 4px;
    color: var(--color-primary-dark);
    text-decoration: none;
    transition: background 0.2s ease;
}

.posts-grid .cat-links a::after {
    display: none;
}

.posts-grid .cat-links a:hover {
    background: rgba(159, 161, 66, 0.2);
}

/* Safari フォールバック（backdrop-filter未対応の場合） */
@supports not (backdrop-filter: blur(12px)) {
    .card-glass {
        background: rgba(255, 255, 255, 0.95);
    }
}