/* Main Content */
.main-content {
    margin-top: 100px;
    position: relative;
    z-index: 10;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Page Header — 独自の背景帯を撤去し、共通のダーク背景に統一（landscape と同様） */
.page-header {
    text-align: center;
    padding: 4rem 0 2rem;
    background: transparent;
    margin: 2rem 0 2.5rem;
}

.page-title {
    font-size: 3rem;
    font-weight: 900;
    margin-bottom: 1rem;
    color: #ffffff;
}

.page-description {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.8);
    max-width: 600px;
    margin: 0 auto;
}

/* Blog Section */
.blog-section {
    padding-bottom: 3rem;
}

/* Blog Grid */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.blog-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 0;
    overflow: hidden;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
}

.blog-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(14, 165, 233, 0.2);
}

.thumbnail {
    width: 100%;
    height: 0;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    position: relative;
    overflow: hidden;
}

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

.thumbnail-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    color: white;
    font-size: 3rem;
    font-weight: bold;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

.card-content {
    padding: 0.8rem 1rem;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.card-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #ffffff;
    /* 共通CSSの .card-title グラデーション（白→シアン）を打ち消して白文字に固定 */
    background: none;
    -webkit-text-fill-color: #ffffff;
    flex: 1;
}

.card-summary {
    display: none;
}

.card-meta {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.5);
    margin-top: auto;
    padding-top: 0.8rem;
}

.date {
    background: rgba(14, 165, 233, 0.2);
    padding: 0.3rem 0.8rem;
    border-radius: 0;
    color: #ffffff;
}

.read-more {
    display: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    .page-title {
        font-size: 2rem;
    }

    .blog-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .container {
        padding: 0 15px;
    }
}

@media (max-width: 480px) {
    .page-title {
        font-size: 1.8rem;
    }

    .card-content {
        padding: 1rem;
    }
}