/* ── CONTENT MAX-WIDTH for hub / category / 404 ── */
.explain-hub,
.explain-category-page,
.explain-404 {
  max-width: 1140px;
  margin-left: auto;
  margin-right: auto;
}

/* ═══════════════════════════════════════════════════════════
   BREADCRUMB
═══════════════════════════════════════════════════════════ */
.explain-breadcrumb { padding: 20px 0 0; margin-bottom: 32px; }
.explain-breadcrumb ol { display: flex; align-items: center; flex-wrap: wrap; list-style: none; gap: 0; }
.explain-breadcrumb li { display: flex; align-items: center; font-size: 12px; font-weight: 600; letter-spacing: .04em; color: var(--c-text3); }
.explain-breadcrumb li + li::before { content: '/'; margin: 0 8px; opacity: .4; }
.explain-breadcrumb a { color: var(--c-text3); transition: color var(--t-fast); }
.explain-breadcrumb a:hover { color: var(--c-text2); }
.explain-breadcrumb [aria-current="page"] { color: var(--c-text2); }

/* ═══════════════════════════════════════════════════════════
   HUB
═══════════════════════════════════════════════════════════ */
.explain-hub { padding: 48px 0 96px; }

.explain-hub-header { position: relative; margin-bottom: 48px; padding-bottom: 48px; }
.explain-hub-header::after {
  content: ''; position: absolute; bottom: 0; left: 0; width: 100%; height: 1px;
  background: linear-gradient(90deg, var(--c-red) 0%, rgba(229,9,26,.2) 30%, transparent 60%);
}
.explain-hub-header h1 { font-family: var(--font-display); font-size: clamp(52px, 6vw, 88px); line-height: .9; letter-spacing: .02em; color: var(--c-text1); margin-bottom: 16px; }
.explain-hub-header p  { font-size: 16px; color: var(--c-text2); max-width: 480px; line-height: 1.6; }

.explain-categories-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }

.explain-category-card {
  position: relative; background: var(--c-bg2); border: 1px solid var(--c-border);
  border-radius: var(--r-lg); padding: 28px 28px 36px;
  text-decoration: none; color: var(--c-text1); display: flex; flex-direction: column; gap: 10px;
  overflow: hidden; transition: border-color var(--t-fast), background var(--t-fast), transform var(--t-fast), box-shadow var(--t-fast);
  opacity: 0; animation: exCardReveal .4s ease forwards;
}
.explain-category-card:nth-child(1){animation-delay:.04s} .explain-category-card:nth-child(2){animation-delay:.08s}
.explain-category-card:nth-child(3){animation-delay:.12s} .explain-category-card:nth-child(4){animation-delay:.16s}
.explain-category-card:nth-child(5){animation-delay:.20s} .explain-category-card:nth-child(6){animation-delay:.24s}
.explain-category-card:nth-child(7){animation-delay:.28s} .explain-category-card:nth-child(8){animation-delay:.32s}
.explain-category-card:nth-child(9){animation-delay:.36s}
@keyframes exCardReveal { from{opacity:0;transform:translateY(14px)} to{opacity:1;transform:translateY(0)} }

.explain-category-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--c-red), transparent); opacity: 0; transition: opacity var(--t-fast);
}
.explain-category-card:hover { border-color: rgba(229,9,26,.3); background: var(--c-bg3); transform: translateY(-2px); box-shadow: 0 8px 32px rgba(0,0,0,.3); }
.explain-category-card:hover::before { opacity: 1; }
.explain-category-card h2 { font-family: var(--font-display); font-size: 26px; letter-spacing: .04em; color: var(--c-text1); line-height: 1; transition: color var(--t-fast); }
.explain-category-card:hover h2 { color: #fff; }
.explain-category-card p { font-size: 13px; color: var(--c-text3); line-height: 1.55; flex: 1; }
.explain-category-card::after {
  content: '→'; position: absolute; bottom: 22px; right: 24px;
  font-size: 16px; color: var(--c-red); opacity: 0; transform: translateX(-4px);
  transition: opacity var(--t-fast), transform var(--t-fast);
}
.explain-category-card:hover::after { opacity: 1; transform: translateX(0); }

/* ═══════════════════════════════════════════════════════════
   CATEGORY PAGE
═══════════════════════════════════════════════════════════ */
.explain-category-page { padding: 0 0 96px; }
.explain-cat-header { padding: 32px 0 36px; border-bottom: 1px solid var(--c-border); margin-bottom: 8px; }
.explain-cat-header h1 { font-family: var(--font-display); font-size: clamp(40px, 5vw, 68px); line-height: .92; letter-spacing: .03em; color: var(--c-text1); margin-bottom: 12px; }
.explain-cat-header p  { font-size: 15px; color: var(--c-text2); max-width: 520px; line-height: 1.6; }

.explain-article-list { list-style: none; padding: 0; margin: 0; }
.explain-article-list-item { border-bottom: 1px solid var(--c-border); }
.explain-article-list-item:first-child { border-top: 1px solid var(--c-border); }
.explain-article-list-item a {
  display: grid; grid-template-columns: 1fr auto; grid-template-rows: auto auto;
  column-gap: 24px; row-gap: 6px; padding: 22px 0; text-decoration: none; color: inherit;
}
.explain-article-list-item a:hover .explain-list-title   { color: #fff; }
.explain-article-list-item a:hover .explain-list-excerpt { color: var(--c-text2); }
.explain-list-title   { grid-column: 1; grid-row: 1; font-size: 17px; font-weight: 700; color: var(--c-text1); line-height: 1.3; transition: color var(--t-fast); }
.explain-list-excerpt {
  grid-column: 1; grid-row: 2; font-size: 13px; color: var(--c-text3); line-height: 1.5;
  transition: color var(--t-fast); display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 2; overflow: hidden;
}
.explain-list-meta {
  grid-column: 2; grid-row: 1 / 3; align-self: center;
  font-size: 11px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--c-text3);
  white-space: nowrap; padding: 4px 10px; border: 1px solid var(--c-border); border-radius: 20px; background: rgba(255,255,255,.03);
}

/* ═══════════════════════════════════════════════════════════
   ARTICLE — 3-col grid centers 680px reading column
═══════════════════════════════════════════════════════════ */
.explain-article { display: grid; grid-template-columns: 1fr min(920px, 100%) 1fr; padding-bottom: 96px; }
.explain-article > * { grid-column: 2; }

.explain-article-header { padding: 16px 0 32px; border-bottom: 1px solid var(--c-border); margin-bottom: 40px; position: relative; }
.explain-article-header::before {
  content: ''; position: absolute; left: -20px; top: 16px; bottom: 32px; width: 3px;
  background: linear-gradient(to bottom, var(--c-red) 0%, rgba(229,9,26,.1) 100%); border-radius: 3px;
}
.explain-article-header h1 { font-family: var(--font-display); font-size: clamp(36px, 5vw, 64px); line-height: .95; letter-spacing: .02em; color: var(--c-text1); margin-bottom: 18px; }
.explain-excerpt { font-size: 17px; color: var(--c-text2); line-height: 1.65; margin-bottom: 20px; }
.explain-meta { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; font-size: 12px; font-weight: 600; letter-spacing: .04em; color: var(--c-text3); }
.explain-meta span { display: flex; align-items: center; gap: 6px; }
.explain-meta i { font-size: 11px; }
.explain-lang-switch a { display: inline-block; padding: 3px 10px; border: 1px solid var(--c-border); border-radius: 20px; font-size: 11px; font-weight: 700; color: var(--c-red); text-decoration: none; background: rgba(229,9,26,.06); transition: background var(--t-fast), color var(--t-fast); }
.explain-lang-switch a:hover { background: rgba(229,9,26,.15); color: #ff4d5a; }

/* ── Body typography ── */
.explain-body { font-size: 16px; line-height: 1.8; color: var(--c-text2); margin-bottom: 56px; }
.explain-body h2 { font-size: 22px; font-weight: 800; color: var(--c-text1); margin: 40px 0 12px; line-height: 1.2; letter-spacing: -.01em; }
.explain-body h3 { font-size: 18px; font-weight: 700; color: var(--c-text1); margin: 28px 0 10px; line-height: 1.3; }
.explain-body h4 { font-size: 14px; font-weight: 700; color: var(--c-text2); margin: 20px 0 8px; text-transform: uppercase; letter-spacing: .08em; }
.explain-body p  { margin-bottom: 20px; }
.explain-body p:last-child { margin-bottom: 0; }
.explain-body strong { color: var(--c-text1); font-weight: 700; }
.explain-body em     { font-style: italic; }

/* Autolinks */
.explain-body a { color: var(--c-red); text-decoration: underline; text-decoration-color: rgba(229,9,26,.35); text-underline-offset: 3px; transition: color var(--t-fast), text-decoration-color var(--t-fast); }
.explain-body a:hover { color: #ff4d5a; text-decoration-color: rgba(229,9,26,.7); }

/* ── Lists ── */
.explain-body ul,
.explain-body ol {
  list-style: none; padding: 0; margin: 0 0 24px;
  display: flex; flex-direction: column; gap: 10px;
}
.explain-body li {
  display: block;
  position: relative;
  padding-left: 18px;
  font-size: 15px; color: var(--c-text2); line-height: 1.7;
}
/* Red glowing dot for ul */
.explain-body ul li::before {
  content: '';
  position: absolute; left: 0; top: 10px;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--c-red); box-shadow: 0 0 6px rgba(229,9,26,.4);
}
/* Numbered circle for ol */
.explain-body ol { counter-reset: ol-counter; }
.explain-body ol li { counter-increment: ol-counter; padding-left: 34px; }
.explain-body ol li::before {
  content: counter(ol-counter);
  position: absolute; left: 0; top: 2px;
  width: 22px; height: 22px; border-radius: 50%;
  background: rgba(229,9,26,.12); border: 1px solid rgba(229,9,26,.3);
  color: var(--c-red); font-size: 11px; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
}

/* Blockquote */
.explain-body blockquote {
  margin: 28px 0; padding: 18px 20px 18px 24px;
  background: rgba(229,9,26,.05); border: 1px solid rgba(229,9,26,.15);
  border-left: 3px solid var(--c-red); border-radius: 0 var(--r-md) var(--r-md) 0;
  font-size: 15px; color: var(--c-text2); font-style: italic; line-height: 1.7;
}
.explain-body blockquote strong { color: var(--c-text1); }

/* Code */
.explain-body code { font-family: var(--font-mono); font-size: .875em; background: var(--c-bg3); border: 1px solid var(--c-border2); padding: 2px 6px; border-radius: 4px; color: #f5c518; }
.explain-body pre { background: var(--c-bg2); border: 1px solid var(--c-border); border-radius: var(--r-md); padding: 20px 24px; overflow-x: auto; margin: 0 0 24px; }
.explain-body pre code { background: none; border: none; padding: 0; font-size: 13px; color: var(--c-text2); }

/* Tables */
.explain-body table { width: 100%; border-collapse: collapse; margin: 0 0 28px; font-size: 14px; }
.explain-body th { text-align: left; padding: 10px 14px; background: var(--c-bg3); border: 1px solid var(--c-border2); font-size: 11px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; color: var(--c-text3); }
.explain-body td { padding: 10px 14px; border: 1px solid var(--c-border); color: var(--c-text2); vertical-align: top; }
.explain-body tr:hover td { background: rgba(255,255,255,.02); }

/* ── FAQ ── */
.explain-faq { padding-top: 40px; border-top: 1px solid var(--c-border); margin-bottom: 40px; }
.explain-faq h2 { font-family: var(--font-display); font-size: 24px; letter-spacing: .08em; color: var(--c-text1); margin-bottom: 20px; }
.explain-faq-list { margin: 0; padding: 0; }
.explain-faq-item { background: var(--c-bg2); border: 1px solid var(--c-border); border-radius: var(--r-md); padding: 20px 24px; margin-bottom: 12px; }
.explain-faq-item dt { font-size: 16px; font-weight: 700; color: var(--c-text1); margin-bottom: 8px; }
.explain-faq-item dd { font-size: 15px; line-height: 1.7; color: var(--c-text2); margin: 0; }

/* ── Related articles ── */
.explain-related { padding-top: 40px; border-top: 1px solid var(--c-border); margin-bottom: 40px; }
.explain-related h2 { font-family: var(--font-display); font-size: 24px; letter-spacing: .08em; color: var(--c-text1); margin-bottom: 20px; }
.explain-cards-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.explain-card { background: var(--c-bg2); border: 1px solid var(--c-border); border-radius: var(--r-lg); overflow: hidden; text-decoration: none; color: inherit; display: flex; flex-direction: column; transition: border-color var(--t-fast), transform var(--t-fast), box-shadow var(--t-fast); }
.explain-card:hover { border-color: rgba(229,9,26,.25); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,.3); }
.explain-card:hover .explain-card-body h3 { color: #fff; }
.explain-card img { width: 100%; height: 140px; object-fit: cover; display: block; }
.explain-card-body { padding: 14px 16px; flex: 1; display: flex; flex-direction: column; gap: 8px; }
.explain-card-body h3 { font-size: 14px; font-weight: 700; color: var(--c-text1); line-height: 1.35; transition: color var(--t-fast); display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 2; overflow: hidden; }
.explain-card-body p  { font-size: 12px; color: var(--c-text3); line-height: 1.5; flex: 1; display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 2; overflow: hidden; }
.explain-card-read-time { font-size: 10px; font-weight: 700; letter-spacing: .07em; text-transform: uppercase; color: var(--c-text3); padding: 3px 8px; border: 1px solid var(--c-border); border-radius: 20px; align-self: flex-start; background: rgba(255,255,255,.03); }

/* ── Back link ── */
.explain-back-link a { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 700; letter-spacing: .04em; color: var(--c-text3); text-decoration: none; padding: 8px 0; transition: color var(--t-fast); }
.explain-back-link a:hover { color: var(--c-red); }

/* ═══════════════════════════════════════════════════════════
   404
═══════════════════════════════════════════════════════════ */
.explain-404 { display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; min-height: 70vh; padding: 60px 24px; gap: 16px; }
.explain-404 h1 { font-family: var(--font-display); font-size: clamp(48px, 8vw, 96px); letter-spacing: .04em; line-height: 1; color: transparent; -webkit-text-stroke: 2px rgba(229,9,26,.6); text-shadow: 0 0 40px rgba(229,9,26,.3); }
.explain-404 p { font-size: 15px; color: var(--c-text2); max-width: 360px; }
.explain-404 a { margin-top: 8px; display: inline-flex; align-items: center; gap: 8px; padding: 11px 22px; background: var(--c-red); border-radius: var(--r-md); font-size: 13px; font-weight: 700; color: #fff; text-decoration: none; transition: background var(--t-fast); box-shadow: 0 4px 16px rgba(229,9,26,.3); }
.explain-404 a:hover { background: var(--c-red2); }

/* ═══════════════════════════════════════════════════════════
   SUBCATEGORY SECTIONS (hub page)
═══════════════════════════════════════════════════════════ */
.explain-hub-body { margin-bottom: 48px; padding-bottom: 48px; border-bottom: 1px solid var(--c-border); }
.explain-subcat-section { margin-bottom: 8px; }
.explain-subcat-heading {
  font-family: var(--font-display); font-size: 20px; letter-spacing: .04em;
  color: var(--c-text1); padding: 24px 0 12px; display: flex; align-items: center; gap: 12px;
}
.explain-subcat-count {
  font-size: 11px; font-weight: 800; letter-spacing: .06em;
  color: var(--c-text3); background: var(--c-bg3); border: 1px solid var(--c-border);
  padding: 2px 8px; border-radius: 20px;
}
.explain-article-list-item.is-upcoming { opacity: .5; }
.explain-list-upcoming {
  display: grid; grid-template-columns: 1fr auto; align-items: center;
  gap: 24px; padding: 22px 0; color: inherit;
}

/* ═══════════════════════════════════════════════════════════
   EMPTY STATE
═══════════════════════════════════════════════════════════ */
.explain-empty { padding: 48px 0; font-size: 14px; color: var(--c-text3); font-style: italic; }

/* ═══════════════════════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════════════════════ */
@media (max-width: 1024px) {
  .explain-categories-grid { grid-template-columns: repeat(2, 1fr); }
  .explain-cards-grid       { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .explain-hub             { padding: 24px 0 48px; }
  .explain-categories-grid { grid-template-columns: 1fr; gap: 10px; }
  .explain-category-card   { padding: 22px 20px; }
  .explain-article         { grid-template-columns: 1fr; }
  .explain-article > *     { grid-column: 1; }
  .explain-article > .explain-breadcrumb { grid-column: 1; }
  .explain-article-header::before { display: none; }
  .explain-cards-grid      { grid-template-columns: 1fr; }
  .explain-article-list-item a { grid-template-columns: 1fr; grid-template-rows: auto auto auto; }
  .explain-list-meta { grid-column: 1; grid-row: 3; justify-self: flex-start; margin-top: 4px; }
}

@media (max-width: 480px) {
  .main { padding: 0 16px 70px !important; }
  .explain-body { font-size: 15px; }
  .explain-meta { gap: 12px; }
}