/* =========================================================
   REMIUM Blog Styles
   トップページのデザイントークン（css/style.css）を継承
   ========================================================= */

/* ---------- Body ---------- */
.blog-body {
    background-color: var(--color-white);
    color: var(--color-text-on-light);
}

/* ---------- Header override (常に白背景) ---------- */
.header--blog {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
}
.header--blog .logo-img { filter: none; }
.header--blog .nav-links a { color: var(--color-text-on-light); }
.header--blog .hamburger-line { background-color: var(--color-dark); }

/* ---------- Blog Hero ---------- */
.blog-hero {
    background-color: var(--color-dark);
    color: var(--color-text-on-dark);
    padding: calc(var(--header-height) + 4rem) var(--container-padding) 4rem;
    position: relative;
    overflow: hidden;
}
.blog-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 20%, rgba(196, 168, 130, 0.15), transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(91, 164, 207, 0.10), transparent 50%);
    pointer-events: none;
}
.blog-hero-inner {
    position: relative;
    max-width: var(--container-max, 1200px);
    margin: 0 auto;
    text-align: center;
}
.blog-breadcrumb {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-family: var(--font-en);
    font-size: 0.8rem;
    letter-spacing: 0.05em;
    color: var(--color-text-on-dark-secondary);
    margin-bottom: 2rem;
}
.blog-breadcrumb a {
    color: var(--color-text-on-dark-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}
.blog-breadcrumb a:hover { color: var(--color-accent-warm); }
.blog-breadcrumb [aria-current="page"] { color: var(--color-text-on-dark); }
.blog-hero-label {
    font-family: var(--font-en);
    font-size: clamp(0.7rem, 1.2vw, 0.85rem);
    font-weight: var(--fw-semibold);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-accent-warm);
    margin-bottom: 1rem;
}
.blog-hero-title {
    font-family: var(--font-ja);
    font-size: clamp(1.8rem, 4.5vw, 3rem);
    font-weight: var(--fw-bold);
    line-height: 1.3;
    letter-spacing: -0.02em;
    color: var(--color-text-on-dark);
    margin-bottom: 1.5rem;
}
.blog-hero-lead {
    font-size: clamp(0.9rem, 1.4vw, 1.05rem);
    line-height: 1.9;
    color: var(--color-text-on-dark-secondary);
    max-width: 760px;
    margin: 0 auto;
}

/* ---------- Blog Section ---------- */
.blog-section {
    background-color: var(--color-light);
    padding: 5rem var(--container-padding);
}
.blog-container {
    max-width: var(--container-max, 1200px);
    margin: 0 auto;
}

/* ---------- Filter ---------- */
.blog-filter {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 3.5rem;
}
.blog-filter-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-ja);
    font-size: 0.88rem;
    font-weight: var(--fw-medium);
    padding: 0.65rem 1.4rem;
    border-radius: 999px;
    border: 1px solid var(--color-border-light);
    background: var(--color-white);
    color: var(--color-text-on-light-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}
.blog-filter-btn i { font-size: 0.85em; }
.blog-filter-btn:hover {
    border-color: var(--color-accent-warm);
    color: var(--color-accent-warm);
}
.blog-filter-btn.is-active {
    background: var(--color-dark);
    border-color: var(--color-dark);
    color: var(--color-white);
}

/* ---------- Blog Grid ---------- */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
}

/* ---------- Blog Card ---------- */
.blog-card {
    background: var(--color-white);
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}
.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}
.blog-card-link {
    display: flex;
    flex-direction: column;
    height: 100%;
    text-decoration: none;
    color: inherit;
}
.blog-card-thumb {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: linear-gradient(135deg, #1A1A1A, #2A2A2A);
    margin: 0;
}
.blog-card-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.blog-card:hover .blog-card-thumb img { transform: scale(1.05); }
.blog-card-thumb-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: rgba(255, 255, 255, 0.2);
    pointer-events: none;
}
.blog-card-thumb img + .blog-card-thumb-placeholder { display: none; }
.blog-card-body {
    padding: 1.5rem 1.5rem 1.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    flex: 1;
}
.blog-card-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}
.blog-card-category {
    display: inline-block;
    font-family: var(--font-en);
    font-size: 0.72rem;
    font-weight: var(--fw-semibold);
    letter-spacing: 0.05em;
    padding: 0.25rem 0.7rem;
    border-radius: 3px;
    color: var(--color-white);
    background: var(--color-dark);
}
.cat-ai-training { background: #2C5F8D; }
.cat-dx          { background: #1E7A6C; }
.cat-subsidy     { background: #B8853F; }
.cat-case        { background: #7A3F8D; }
.cat-column      { background: #4A4A4A; }
.blog-card-date {
    font-family: var(--font-en);
    font-size: 0.78rem;
    color: var(--color-text-on-light-secondary);
    letter-spacing: 0.03em;
}
.blog-card-title {
    font-family: var(--font-ja);
    font-size: 1.1rem;
    font-weight: var(--fw-bold);
    line-height: 1.5;
    color: var(--color-text-on-light);
    margin: 0;
}
.blog-card-excerpt {
    font-size: 0.88rem;
    line-height: 1.75;
    color: var(--color-text-on-light-secondary);
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.blog-card-readmore {
    margin-top: auto;
    font-family: var(--font-en);
    font-size: 0.82rem;
    font-weight: var(--fw-semibold);
    color: var(--color-accent-warm);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition: gap 0.2s ease;
    padding-top: 0.5rem;
}
.blog-card:hover .blog-card-readmore { gap: 0.7rem; }

/* ---------- Empty ---------- */
.blog-empty {
    text-align: center;
    padding: 4rem 1rem;
    color: var(--color-text-on-light-secondary);
    font-size: 0.95rem;
}
.blog-empty i {
    display: block;
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--color-text-on-light-muted);
}

/* ---------- CTA ---------- */
.blog-cta {
    background-color: var(--color-dark);
    color: var(--color-text-on-dark);
    padding: 5rem var(--container-padding);
    text-align: center;
}
.blog-cta-inner {
    max-width: 760px;
    margin: 0 auto;
}
.blog-cta-label {
    font-family: var(--font-en);
    font-size: 0.78rem;
    font-weight: var(--fw-semibold);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-accent-warm);
    margin-bottom: 1rem;
}
.blog-cta-title {
    font-family: var(--font-ja);
    font-size: clamp(1.5rem, 3.2vw, 2.2rem);
    font-weight: var(--fw-bold);
    line-height: 1.45;
    color: var(--color-text-on-dark);
    margin-bottom: 1.25rem;
}
.blog-cta-lead {
    font-size: 0.95rem;
    line-height: 1.9;
    color: var(--color-text-on-dark-secondary);
    margin-bottom: 2.5rem;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
    .blog-hero { padding: calc(var(--header-height) + 2rem) var(--container-padding) 3rem; }
    .blog-section { padding: 3rem var(--container-padding); }
    .blog-grid { grid-template-columns: 1fr; gap: 1.5rem; }
    .blog-filter { gap: 0.4rem; }
    .blog-filter-btn { font-size: 0.8rem; padding: 0.55rem 1rem; }
    .blog-cta { padding: 3.5rem var(--container-padding); }
}