/* ==========================================
   BLOG POST (칼럼 상세) — blog-post.css
   blog.css 와 별개 — 상세 페이지 전용
   ========================================== */

   :root {
    --ink: #111111;
    --ink-2: #444444;
    --ink-3: #888888;
    --rule: #e2e2e2;
    --accent: #2563eb;
    --bg: #ffffff;
    --col: 720px;
}

/* HERO */
.blog-post-hero {
    padding: 120px 0 0;
    background: #ffffff;
}
.blog-post-hero__content {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}
.blog-post-hero__inner {
    max-width: var(--col);
    padding-bottom: 56px;
}
.blog-post-hero__divider {
    height: 4px;
    background: var(--accent);
    margin-top: 0;
}
.blog-post-hero__highlight {
    display: inline-block;
    background: #FFBC29;
    padding: 2px 6px 0;
    line-height: 1;
}
.blog-post-hero__breadcrumb {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 40px;
    font-size: 11px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ink-3);
}
.blog-post-hero__breadcrumb a { color: var(--ink-3); text-decoration: none; }
.blog-post-hero__breadcrumb a:hover { color: var(--ink); }
.blog-post-hero__breadcrumb svg { width: 10px; height: 10px; opacity: 0.35; }
.blog-post-hero__meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}
.blog-post-hero__number {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--ink-3);
}
.blog-post-hero__number::after { content: '·'; margin-left: 12px; opacity: 0.3; }
.blog-post-hero__category {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ink);
    display: flex;
    align-items: center;
    gap: 6px;
}
.blog-post-hero__category::before {
    content: '';
    display: inline-block;
    width: 8px;
    height: 8px;
    background: #FFBC29;
    flex-shrink: 0;
}
.blog-post-hero__title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    color: var(--ink);
    line-height: 1.25;
    margin-bottom: 24px;
    letter-spacing: -0.035em;
}
.blog-post-hero__highlight {
    background: linear-gradient(to bottom, transparent 60%, #FFBC29 60%);
    display: inline;
    padding-bottom: 2px;
}
.blog-post-hero__excerpt {
    font-size: 1.05rem;
    color: var(--ink-2);
    line-height: 1.8;
    margin-bottom: 40px;
    max-width: 600px;
}
.blog-post-hero__accent-bar { display: none; }
.blog-post-hero__info {
    display: flex;
    align-items: center;
    gap: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--rule);
}
.blog-post-hero__date,
.blog-post-hero__reading-time {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    letter-spacing: 0.04em;
    color: var(--ink-3);
}
.blog-post-hero__date svg,
.blog-post-hero__reading-time svg { width: 13px; height: 13px; opacity: 0.5; }

/* 2-COL LAYOUT */
.blog-post-content { padding: 60px 0 120px; background: #fafaf9; }
.blog-post-layout {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: var(--col) 1fr;
    gap: 80px;
    align-items: start;
}
.blog-post-article { min-width: 0; }

/* STICKY TOC */
.blog-toc { position: sticky; top: 96px; }
.blog-toc__label {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--ink-3);
    margin-bottom: 16px;
    display: block;
}
.blog-toc__list { list-style: none; padding: 0; margin: 0; }
.blog-toc__item { margin-bottom: 2px; }
.blog-toc__link {
    display: block;
    font-size: 12.5px;
    line-height: 1.5;
    color: var(--ink-3);
    text-decoration: none;
    padding: 5px 0;
    transition: color 0.15s;
}
.blog-toc__link:hover { color: var(--ink); }
.blog-toc__link.is-active { color: var(--accent); font-weight: 600; }
.blog-toc__progress { margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--rule); }
.blog-toc__progress-label {
    font-size: 10px;
    color: var(--ink-3);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
}
.blog-toc__progress-bar { height: 1px; background: var(--rule); position: relative; }
.blog-toc__progress-fill {
    position: absolute; top: 0; left: 0;
    height: 100%; background: var(--accent);
    width: 0%; transition: width 0.1s linear;
}

/* ARTICLE */
.blog-post__hook {
    font-size: 1.1rem;
    font-style: italic;
    color: var(--ink-2);
    padding-bottom: 32px;
    margin-bottom: 48px;
    line-height: 1.8;
    border-bottom: 1px solid var(--rule);
}
.blog-post__body h2 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--ink);
    margin: 64px 0 20px;
    padding-top: 40px;
    border-top: 1px solid var(--rule);
    line-height: 1.3;
    letter-spacing: -0.025em;
}
.blog-post__body h2:first-of-type { margin-top: 0; padding-top: 0; border-top: none; }
.blog-post__body h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--ink);
    margin: 40px 0 12px;
    line-height: 1.4;
    letter-spacing: -0.01em;
}
.blog-post__body p {
    font-size: 0.975rem;
    line-height: 1.9;
    color: var(--ink-2);
    margin-bottom: 20px;
}
.blog-post__body p strong { color: var(--ink); font-weight: 600; }
.blog-post__body ul,
.blog-post__body ol { margin: 20px 0; padding-left: 0; list-style: none; }
.blog-post__body li {
    font-size: 0.975rem;
    line-height: 1.8;
    color: var(--ink-2);
    margin-bottom: 10px;
    padding-left: 20px;
    position: relative;
}
.blog-post__body li::before {
    content: '—'; position: absolute; left: 0;
    color: var(--ink-3); font-size: 0.85rem;
}
.blog-post__body li strong { color: var(--ink); }

/* TABLE */
.blog-post__body table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0 32px;
    font-size: 0.9rem;
}
.blog-post__body table th {
    background: #f4f4f3;
    padding: 12px 16px;
    text-align: left;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ink-3);
    border-bottom: 2px solid var(--rule);
}
.blog-post__body table td {
    padding: 14px 16px;
    color: var(--ink-2);
    border-bottom: 1px solid var(--rule);
    line-height: 1.7;
    vertical-align: top;
    font-size: 0.9rem;
}
.blog-post__body table tr:last-child td { border-bottom: none; }
.blog-post__body table tr:hover td { background: #f9f9f8; }
@media (max-width: 768px) {
    .blog-post__body table { font-size: 0.82rem; }
    .blog-post__body table th,
    .blog-post__body table td { padding: 10px 12px; }
}

/* DEFINITION */
.blog-post__definition {
    font-size: 0.975rem;
    color: var(--ink-2);
    padding: 24px 0;
    margin: 0 0 40px;
    line-height: 1.8;
    border-top: 1px solid var(--rule);
    border-bottom: 1px solid var(--rule);
}
.blog-post__definition strong {
    display: block;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ink-3);
    margin-bottom: 10px;
}

/* KEY SENTENCE */
.blog-post__key-sentence {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--ink);
    margin: 36px 0;
    line-height: 1.65;
    letter-spacing: -0.02em;
}

/* SCOPE GRID */
.blog-post__scope-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1px;
    margin: 24px 0;
    background: var(--rule);
    border: 1px solid var(--rule);
}
.blog-post__scope-item {
    padding: 18px 20px;
    background: var(--bg);
    font-size: 0.875rem;
    color: var(--ink-2);
    line-height: 1.65;
}
.blog-post__scope-item strong {
    display: block;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 6px;
}

/* COMPARE */
.blog-post__compare {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1px;
    margin: 24px 0;
    background: var(--rule);
    border: 1px solid var(--rule);
}
.blog-post__compare-item {
    padding: 20px 22px;
    background: var(--bg);
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--ink-2);
}
.blog-post__compare-item--bad { background: #fafafa; }
.blog-post__compare-item--good { background: #eff6ff; }
.blog-post__compare-item strong {
    display: block;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 8px;
}
.blog-post__compare-item--bad strong { color: var(--ink-3); }
.blog-post__compare-item--good strong { color: var(--accent); font-size: 11px; }

/* CHECKLIST */
.blog-post__checklist {
    margin: 24px 0;
    padding: 20px 24px;
    background: #eff6ff;
}
.blog-post__checklist-label {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 10px;
    display: block;
}
.blog-post__checklist p {
    font-size: 0.975rem;
    color: var(--ink);
    margin-bottom: 0;
    font-weight: 600;
    line-height: 1.7;
}

/* SYMPTOM LIST */
.blog-post__symptom-list { margin: 20px 0; padding: 0; list-style: none; }
.blog-post__symptom-list li {
    font-size: 0.975rem;
    line-height: 1.75;
    color: var(--ink-2);
    padding: 12px 0 12px 20px;
    border-bottom: 1px solid var(--rule);
    position: relative;
}
.blog-post__symptom-list li:first-child { border-top: 1px solid var(--rule); }
.blog-post__symptom-list li::before { content: '—'; position: absolute; left: 0; color: var(--ink-3); }

/* CONCLUSION */
.blog-post__conclusion {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--ink);
    padding: 40px 0;
    margin: 48px 0;
    line-height: 1.65;
    text-align: center;
    border-top: 1px solid var(--ink);
    border-bottom: 1px solid var(--ink);
    letter-spacing: -0.02em;
}

/* INTERNAL LINKS */
.blog-post__internal-link {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0;
    padding: 16px 20px;
    border-bottom: 1px solid var(--rule);
    font-size: 0.9rem;
    font-weight: 600;
    color: #fff;
    background: var(--accent);
    text-decoration: none;
    transition: background 0.15s;
}
.blog-post__internal-link:first-of-type { border-top: none; }
.blog-post__internal-link:hover { background: #1d4ed8; color: #fff; }
.blog-post__internal-link svg { width: 14px; height: 14px; flex-shrink: 0; margin-left: auto; opacity: 0.7; }
.blog-post__internal-link--secondary {
    background: transparent;
    color: var(--accent);
    border: 1px solid #dbeafe;
    margin-top: 6px;
    font-weight: 500;
}
.blog-post__internal-link--secondary:hover { background: #eff6ff; color: var(--accent); }
.blog-post__internal-link--secondary svg { opacity: 0.5; }

/* FAQ ACCORDION */
.blog-post__faq { margin: 56px 0 0; }
.blog-post__faq-title {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--ink-3);
    margin-bottom: 0;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--rule);
}
.blog-post__faq-item { border-bottom: 1px solid var(--rule); }
.blog-post__faq-trigger {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    width: 100%;
    background: none;
    border: none;
    padding: 20px 0;
    cursor: pointer;
    text-align: left;
}
.blog-post__faq-trigger:hover .blog-post__faq-q { color: var(--accent); }
.blog-post__faq-q {
    font-size: 0.975rem;
    font-weight: 700;
    color: var(--ink);
    line-height: 1.5;
    letter-spacing: -0.01em;
    transition: color 0.15s;
    margin: 0;
}
.blog-post__faq-q::before { content: none; }
.blog-post__faq-icon {
    flex-shrink: 0;
    width: 16px;
    height: 16px;
    color: var(--ink-3);
    transition: transform 0.25s ease;
}
.blog-post__faq-item.is-open .blog-post__faq-icon {
    transform: rotate(45deg);
    color: var(--accent);
}
.blog-post__faq-body {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.25s ease;
}
.blog-post__faq-item.is-open .blog-post__faq-body {
    grid-template-rows: 1fr;
}
.blog-post__faq-body-inner { overflow: hidden; }
.blog-post__faq-a {
    font-size: 0.925rem;
    color: var(--ink-2);
    line-height: 1.85;
    margin: 0;
    padding-bottom: 20px;
}

/* TAGS */
.blog-post__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0;
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid var(--rule);
}
.blog-post__tag {
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.06em;
    color: var(--accent);
    background: #eff6ff;
    padding: 4px 10px;
    margin-right: 6px;
    margin-bottom: 4px;
    text-decoration: none;
    display: inline-block;
}

/* BOTTOM NAV */
.blog-post-nav { max-width: 1100px; margin: 0 auto; padding: 40px 24px 0; }
.blog-post-nav__links {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--rule);
    padding-top: 32px;
}
.blog-post-nav__back,
.blog-post-nav__prev {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    letter-spacing: 0.04em;
    color: var(--ink-3);
    text-decoration: none;
    transition: color 0.15s;
}
.blog-post-nav__back:hover,
.blog-post-nav__prev:hover { color: var(--accent); }
.blog-post-nav__back svg,
.blog-post-nav__prev svg { width: 14px; height: 14px; }

/* RESPONSIVE */
@media (max-width: 1080px) {
    .blog-post-layout { grid-template-columns: 1fr; max-width: var(--col); }
    .blog-toc { display: none; }
}
@media (max-width: 768px) {
    .blog-post-hero { padding: 100px 0 44px; }
    .blog-post-hero__title { font-size: clamp(1.7rem, 6vw, 2.2rem); }
    .blog-post-hero__info { flex-direction: column; align-items: flex-start; gap: 8px; }
    .blog-post__body h2 { margin: 48px 0 16px; padding-top: 32px; }
    .blog-post__compare { grid-template-columns: 1fr; }
    .blog-post__scope-grid { grid-template-columns: 1fr; }
    .blog-post-nav__links { flex-direction: column; gap: 16px; align-items: flex-start; }
    .blog-post-layout { padding: 0 16px; }
}

/* ─── ENTRANCE ANIMATIONS ─── */

.blog-post-hero__breadcrumb,
.blog-post-hero__meta,
.blog-post-hero__title,
.blog-post-hero__excerpt,
.blog-post-hero__info {
    opacity: 0;
    transform: translateY(14px);
}

.blog-post-hero__divider {
    transform-origin: left center;
    transform: scaleX(0);
}

.blog-post-content {
    opacity: 0;
    transform: translateY(24px);
}

.is-ready .blog-post-hero__breadcrumb {
    animation: heroFadeUp 0.45s cubic-bezier(0.22,1,0.36,1) 0.05s forwards;
}
.is-ready .blog-post-hero__meta {
    animation: heroFadeUp 0.45s cubic-bezier(0.22,1,0.36,1) 0.15s forwards;
}
.is-ready .blog-post-hero__title {
    animation: heroFadeUp 0.55s cubic-bezier(0.22,1,0.36,1) 0.25s forwards;
}
.is-ready .blog-post-hero__excerpt {
    animation: heroFadeUp 0.45s cubic-bezier(0.22,1,0.36,1) 0.38s forwards;
}
.is-ready .blog-post-hero__info {
    animation: heroFadeUp 0.4s cubic-bezier(0.22,1,0.36,1) 0.48s forwards;
}
.is-ready .blog-post-hero__divider {
    animation: dividerSlide 0.6s cubic-bezier(0.76,0,0.24,1) 0.62s forwards;
}
.is-ready .blog-post-content {
    animation: contentRise 0.55s cubic-bezier(0.22,1,0.36,1) 0.88s forwards;
}

@keyframes heroFadeUp {
    to { opacity: 1; transform: translateY(0); }
}
@keyframes dividerSlide {
    to { transform: scaleX(1); }
}
@keyframes contentRise {
    to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
    .blog-post-hero__breadcrumb,
    .blog-post-hero__meta,
    .blog-post-hero__title,
    .blog-post-hero__excerpt,
    .blog-post-hero__info,
    .blog-post-hero__divider,
    .blog-post-content {
        opacity: 1 !important;
        transform: none !important;
        animation: none !important;
    }
}