/* Article */
.single-post-sec {
    padding: 80px 0;
}
.single-post-sec .container {
    max-width: 800px;
}

/* Meta */
.post-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}
.post-meta time {
    font-family: var(--font-en);
    font-size: 15px;
    color: var(--color-text-light);
    letter-spacing: 0.1em;
}
.post-cat-tag {
    display: inline-block;
    background: var(--color-main);
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 4px 14px;
    letter-spacing: 0.08em;
    transition: opacity 0.3s;
}
.post-cat-tag:hover { opacity: 0.8; color: white; }

/* Thumbnail */
.post-thumbnail {
    margin-bottom: 2.5rem;
}
.post-thumbnail img {
    width: 100%;
    height: auto;
}

/* Content */
.post-content {
    font-size: 15px;
    line-height: 2.2;
    letter-spacing: 0.08em;
    color: var(--color-text);
}
.post-content p {
    margin-bottom: 1.5rem;
}
.post-content img {
    max-width: 100%;
    height: auto;
    margin: 1.5rem 0;
}
.post-content h2 {
    font-size: 1.4rem;
    font-weight: 700;
    margin: 2.5rem 0 1rem;
    padding-bottom: 0.8rem;
    border-bottom: 1px solid var(--color-border);
}
.post-content h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin: 2rem 0 0.8rem;
}
.post-content a {
    color: var(--color-main);
    text-decoration: underline;
}

/* Navigation */
.post-nav {
    display: flex;
    gap: 16px;
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
}
.post-nav-link {
    flex: 1;
    padding: 20px;
    border: 1px solid var(--color-border);
    transition: all 0.3s;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.post-nav-link:hover {
    border-color: var(--color-main);
    background: var(--color-main-light);
}
.post-nav-link.next { text-align: right; }
.nav-label {
    font-size: 0.75rem;
    color: var(--color-accent);
    letter-spacing: 0.1em;
    font-weight: 700;
}
.nav-title {
    font-size: 0.9rem;
    font-weight: 500;
    line-height: 1.6;
    color: var(--color-text);
}

@media (max-width: 767px) {
    .single-post-sec { padding: 60px 0; }
    .post-nav { flex-direction: column; }
}