/* ============================================================
 * IT LEARN — Blog public styles
 *   List grid, post card, single post layout, pagination, prose
 * ============================================================ */

/* Body theme — dùng red+navy default (page-blog không override) */
body.page-blog {
  --bg-glow-1: rgba(220, 38, 38, .35);
  --bg-glow-2: rgba(37, 99, 235, .30);
  --bg-glow-3: rgba(220, 38, 38, .12);
}

/* ─── Hero ─── */
.blog-hero {
  padding: 70px 24px 40px;
  text-align: center;
}
.blog-hero h1 { margin: 18px auto 0; max-width: 18ch; }
.blog-hero .lead { margin-top: 16px; }

/* ─── Category pills ─── */
.blog-cats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  flex: 1;
  min-width: 0;
}
.blog-cats a {
  font-size: 13.5px;
  padding: 8px 16px;
  border-radius: 999px;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--line);
  color: var(--text-dim);
  transition: all .2s;
}
.blog-cats a:hover {
  border-color: var(--line-strong);
  color: var(--text);
}
.blog-cats a.active {
  background: var(--grad);
  color: #fff;
  border-color: transparent;
  box-shadow: var(--shadow-red);
}
/* Hover trên active: giữ nền gradient + chữ trắng (override light-mode :hover
   của kiemthu.css), thêm brightness + lift cho feedback rõ ràng */
.blog-cats a.active:hover {
  background: var(--grad);
  color: #fff;
  border-color: transparent;
  filter: brightness(1.08);
  transform: translateY(-1px);
  box-shadow: 0 14px 28px -8px rgba(220, 38, 38, .55);
}

/* ─── List ─── */
.blog-list {
  padding: 12px 24px 80px;
  max-width: 1240px;
  margin: 0 auto;
  transition: opacity .2s ease;
}
.blog-list.is-loading { opacity: .45; pointer-events: none; }
.empty-state {
  text-align: center;
  color: var(--text-dim);
  padding: 60px 0;
}
.post-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}
@media (min-width: 720px)  { .post-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1080px) { .post-grid { grid-template-columns: repeat(3, 1fr); } }

/* ─── Post card ─── */
.post-card {
  background: rgba(255,255,255,.03);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: transform .3s ease, border-color .25s, box-shadow .35s;
}
.post-card:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  box-shadow: 0 30px 70px -30px rgba(0,0,0,.6);
}
.post-card-link { display: block; color: inherit; }
.post-card-cover {
  margin: 0;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: rgba(255,255,255,.04);
}
.post-card-cover img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .55s ease;
}
.post-card:hover .post-card-cover img { transform: scale(1.04); }
.post-card-cover-empty {
  display: grid; place-items: center;
  background: var(--grad);
}
.post-card-cover-empty span {
  font-family: var(--display);
  font-size: 64px;
  font-weight: 600;
  color: rgba(255,255,255,.85);
}
.post-card-body { padding: 22px 22px 24px; }
.post-card-cat {
  display: inline-block;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--red-bright);
  padding: 4px 10px;
  border: 1px solid currentColor;
  border-radius: 999px;
  margin-bottom: 12px;
}
.post-card-title {
  font-family: var(--display);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: .005em;
  margin: 0 0 12px;
  color: var(--text);
}
.post-card-summary {
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.75;
  letter-spacing: .01em;
  margin: 0 0 16px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.post-card-meta {
  display: flex; gap: 8px;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text-mute);
  letter-spacing: .04em;
}

/* ─── Pagination ─── */
.pagination {
  display: flex; gap: 6px;
  justify-content: center;
  margin: 50px 0 0;
}
.pagination a {
  min-width: 38px;
  height: 38px;
  border-radius: 10px;
  display: grid; place-items: center;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--line);
  color: var(--text-dim);
  font-size: 14px;
  font-family: var(--mono);
  transition: all .2s;
}
.pagination a:hover {
  border-color: var(--line-strong);
  color: var(--text);
}
.pagination a.active {
  background: var(--grad);
  color: #fff;
  border-color: transparent;
}

/* ─── Single post ─── */
.blog-post {
  position: relative;
  padding: 60px 24px 80px;
}

/* ─── Floating share rail (Facebook + Copy link) ─── */
.post-share-rail {
  position: absolute;
  top: 60px;          /* khớp padding-top của .blog-post */
  left: -84px;
  width: 60px;
  height: calc(100% - 60px);
  pointer-events: none;
}
.post-share {
  position: sticky;
  top: 110px;         /* dưới header */
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: auto;
}
.post-share-btn {
  position: relative;
  width: 44px; height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--text-dim);
  cursor: pointer;
  text-decoration: none;
  transition: background .15s, border-color .15s, color .15s, transform .15s;
}
.post-share-btn:hover {
  background: rgba(220,38,38,.10);
  border-color: var(--red-bright);
  color: var(--red-bright);
  transform: translateY(-2px);
}
.post-share-btn .icon-check { display: none; }
.post-share-btn.copied {
  background: rgba(16,185,129,.14);
  border-color: var(--green-bright);
  color: var(--green-bright);
}
.post-share-btn.copied .icon-link { display: none; }
.post-share-btn.copied .icon-check { display: block; }
[data-theme="light"] .post-share-btn {
  background: #fff;
  box-shadow: 0 1px 2px rgba(15,23,42,.06);
}

/* Tooltip "Đã copy!" cho button copy */
.post-share-btn[data-copy-link]::after {
  content: "Đã copy!";
  position: absolute;
  left: calc(100% + 12px);
  top: 50%;
  transform: translateY(-50%) translateX(-6px);
  background: var(--green-bright);
  color: #052e16;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .05em;
  padding: 5px 10px;
  border-radius: 6px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s, transform .2s;
}
.post-share-btn.copied::after {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}

/* Viewport hẹp — không đủ chỗ cho rail bên trái → fallback ngang trên đầu post */
@media (max-width: 1240px) {
  .post-share-rail {
    position: static;
    width: auto;
    height: auto;
    margin: 0 0 24px;
    pointer-events: auto;
  }
  .post-share {
    position: static;
    flex-direction: row;
    justify-content: flex-start;
  }
  .post-share-btn[data-copy-link]::after {
    left: 50%;
    top: calc(100% + 8px);
    transform: translateX(-50%) translateY(-4px);
  }
  .post-share-btn[data-copy-link].copied::after {
    transform: translateX(-50%) translateY(0);
  }
}
.post-cat-pill {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--red-bright);
  padding: 6px 14px;
  border: 1px solid currentColor;
  border-radius: 999px;
  margin-bottom: 18px;
}
.post-title {
  font-family: var(--display);
  font-size: clamp(32px, 4.4vw, 52px);
  letter-spacing: -.02em;
  line-height: 1.1;
  margin: 0 0 18px;
}
.post-meta {
  display: flex; gap: 8px; flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-mute);
  letter-spacing: .04em;
  margin-bottom: 32px;
}
.post-cover {
  margin: 0 0 32px;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.03);
}
.post-cover img { width: 100%; height: auto; display: block; }
.post-summary {
  font-size: 18px;
  line-height: 1.6;
  color: var(--text);
  padding: 18px 0 24px;
  margin: 0 0 24px;
  border-bottom: 1px solid var(--line);
  font-family: var(--display);
  font-weight: 400;
  font-style: italic;
}

/* ─── Prose: nội dung post từ TinyMCE ─── */
.post-content {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text);
}
.post-content > * + * { margin-top: 1em; }
.post-content h2 {
  font-family: var(--display);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 600;
  letter-spacing: -.02em;
  line-height: 1.2;
  margin-top: 1.6em;
  margin-bottom: .4em;
}
.post-content h3 {
  font-family: var(--display);
  font-size: 22px;
  font-weight: 600;
  margin-top: 1.4em;
  margin-bottom: .3em;
}
.post-content h4 {
  font-family: var(--display);
  font-size: 18px;
  font-weight: 600;
  margin-top: 1.2em;
  margin-bottom: .3em;
}
.post-content p { color: var(--text); }
.post-content a {
  color: var(--red-bright);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
.post-content a:hover { color: var(--text); }
.post-content strong, .post-content b { color: var(--text); font-weight: 700; }
.post-content em, .post-content i { font-style: italic; }
.post-content ul, .post-content ol {
  padding-left: 1.5em;
  color: var(--text);
}
.post-content li { margin: .35em 0; }
.post-content blockquote {
  border-left: 3px solid var(--red-bright);
  padding: 4px 18px;
  margin: 1.2em 0;
  color: var(--text-dim);
  font-style: italic;
  background: rgba(248,113,113,.04);
  border-radius: 0 8px 8px 0;
}
.post-content code {
  font-family: var(--mono);
  font-size: .92em;
  background: rgba(255,255,255,.06);
  padding: 2px 7px;
  border-radius: 5px;
  color: var(--red-bright);
}
.post-content pre {
  background: rgba(8,13,31,.7);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 20px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.6;
}
.post-content pre code { background: none; padding: 0; color: var(--text); }
.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  margin: 1.4em auto;
  display: block;
  border: 1px solid var(--line);
}
.post-content figure { margin: 1.4em 0; }
.post-content figure img { margin: 0 auto; }
.post-content figcaption {
  text-align: center;
  font-size: 13px;
  color: var(--text-mute);
  margin-top: 8px;
  font-style: italic;
}
.post-content hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 2em 0;
}
.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.4em 0;
  font-size: 15px;
}
.post-content th, .post-content td {
  padding: 10px 14px;
  border: 1px solid var(--line);
  text-align: left;
}
.post-content th { background: rgba(255,255,255,.04); font-weight: 600; }

/* ─── Series — list ngang dọc đánh số, current highlight ─── */
.blog-series {
  padding: 36px 24px 0;
  margin: 24px auto 0;
}
.series-head {
  margin-bottom: 18px;
}
.series-eyebrow {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--red-bright);
  background: rgba(220,38,38,.10);
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
}
.series-title {
  font-family: var(--display);
  font-size: 22px;
  font-weight: 700;
  margin: 0 0 6px;
  letter-spacing: -.01em;
  line-height: 1.3;
}
.series-desc {
  margin: 0;
  color: var(--text-dim);
  font-size: 14.5px;
  line-height: 1.6;
}
.series-list {
  list-style: none;
  padding: 0;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  background: rgba(255,255,255,.02);
}
.series-list-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0;
  border-bottom: 1px solid var(--line);
}
.series-list-item:last-child { border-bottom: none; }
.series-list-num {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-left: 14px;
  font-family: var(--mono);
  font-weight: 600;
  font-size: 14px;
  color: var(--text-mute);
  background: rgba(255,255,255,.04);
  border: 1px solid var(--line);
  border-radius: 50%;
}
.series-list-link {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px 14px 0;
  color: var(--text);
  font-weight: 500;
  font-size: 15.5px;
  line-height: 1.4;
  transition: color .15s;
}
a.series-list-link:hover { color: var(--red-bright); }
a.series-list-link:hover .series-list-meta { color: var(--text); }
.series-list-post-title {
  flex: 1;
}
.series-list-meta {
  flex-shrink: 0;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text-mute);
  font-weight: 400;
  letter-spacing: .03em;
}
.series-list-current-tag {
  flex-shrink: 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--red-bright);
  background: rgba(220,38,38,.14);
  border: 1px solid rgba(220,38,38,.4);
  padding: 4px 10px;
  border-radius: 999px;
}
.series-list-item.is-current {
  background: linear-gradient(90deg, rgba(220,38,38,.08), transparent);
}
.series-list-item.is-current .series-list-num {
  color: #fff;
  background: var(--red-bright);
  border-color: var(--red-bright);
  box-shadow: 0 0 0 4px rgba(220,38,38,.18);
}
.series-list-item.is-current .series-list-link {
  cursor: default;
}
.series-list-item.is-current .series-list-post-title {
  color: var(--text);
  font-weight: 600;
}
[data-theme="light"] .series-list {
  background: rgba(15,23,42,.02);
}
[data-theme="light"] .series-list-num {
  background: rgba(15,23,42,.04);
}
@media (max-width: 640px) {
  .series-list-link {
    flex-wrap: wrap;
    padding-right: 14px;
  }
  .series-list-meta { font-size: 11px; }
  .series-list-current-tag { font-size: 10px; padding: 3px 8px; }
}

/* ─── Related ─── */
.blog-related {
  padding: 40px 24px 80px;
  max-width: 1240px;
  margin: 40px auto 0;
  border-top: 1px solid var(--line);
}
.related-title {
  font-family: var(--display);
  font-size: 26px;
  font-weight: 600;
  margin: 0 0 28px;
  text-align: center;
}

/* ─── Preview banner (chỉ admin login thấy) ─── */
.preview-banner {
  position: sticky;
  top: 64px;
  z-index: 50;
  max-width: 1100px;
  margin: 16px auto 0;
  padding: 12px 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  background: linear-gradient(135deg, rgba(245,158,11,.18), rgba(245,158,11,.08));
  border: 1px solid rgba(245,158,11,.45);
  border-radius: 12px;
  color: #fde68a;
  font-size: 14px;
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 24px -8px rgba(245,158,11,.35);
}
.preview-banner-icon {
  font-size: 20px;
  line-height: 1;
}
.preview-banner-text {
  flex: 1;
  line-height: 1.5;
}
.preview-banner-text strong {
  color: #fbbf24;
  font-weight: 700;
}
.preview-banner-edit {
  flex-shrink: 0;
  padding: 6px 14px;
  border: 1px solid rgba(245,158,11,.5);
  border-radius: 8px;
  color: #fbbf24;
  font-weight: 500;
  text-decoration: none;
  transition: background .15s;
}
.preview-banner-edit:hover {
  background: rgba(245,158,11,.18);
}
[data-theme="light"] .preview-banner {
  background: linear-gradient(135deg, rgba(245,158,11,.18), rgba(245,158,11,.06));
  color: #92400e;
}
[data-theme="light"] .preview-banner-text strong,
[data-theme="light"] .preview-banner-edit { color: #b45309; }
[data-theme="light"] .preview-banner-edit { border-color: rgba(180,83,9,.5); }
[data-theme="light"] .preview-banner-edit:hover { background: rgba(245,158,11,.12); }
@media (max-width: 640px) {
  .preview-banner {
    flex-wrap: wrap;
    top: 56px;
    font-size: 13px;
  }
  .preview-banner-edit { margin-left: auto; }
}

/* ============================================================
   COMMENTS SECTION
   ============================================================ */
.blog-comments {
  margin: 64px auto 80px;
  padding: 0 24px;
}
.comments-title {
  font-family: var(--display, "Bricolage Grotesque", sans-serif);
  font-size: 28px;
  font-weight: 600;
  margin: 0 0 24px;
  color: var(--text, #f1f5f9);
}
.comments-count {
  color: var(--text-mute, #64748b);
  font-weight: 400;
  font-size: 20px;
}
.comments-empty {
  color: var(--text-dim, #94a3b8);
  font-size: 15px;
  padding: 24px 0;
  border-top: 1px solid var(--line, rgba(255, 255, 255, .08));
  border-bottom: 1px solid var(--line, rgba(255, 255, 255, .08));
  text-align: center;
  margin-bottom: 32px;
}

/* ── Comment list ── */
.comment-list,
.comment-replies {
  list-style: none;
  margin: 0 0 32px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.comment-replies {
  margin: 14px 0 0 32px;
  padding-left: 16px;
  border-left: 2px solid rgba(248, 113, 113, .25);
  gap: 14px;
}
.comment-item {
  background: rgba(255, 255, 255, .03);
  border: 1px solid var(--line, rgba(255, 255, 255, .08));
  border-radius: 12px;
  padding: 14px 16px;
}
.comment-item.is-reply {
  background: rgba(255, 255, 255, .02);
  padding: 12px 14px;
}
.comment-meta {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 6px;
  flex-wrap: wrap;
}
.comment-author {
  color: var(--red-bright, #f87171);
  font-weight: 600;
  font-size: 14px;
}
.comment-time {
  color: var(--text-mute, #64748b);
  font-size: 12px;
}
.comment-body {
  color: var(--text, #f1f5f9);
  font-size: 14.5px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-wrap: break-word;
}
.comment-actions {
  display: flex;
  gap: 8px;
  margin-top: 10px;
  flex-wrap: wrap;
}
.comment-react,
.comment-reply-btn {
  background: rgba(255, 255, 255, .04);
  border: 1px solid var(--line, rgba(255, 255, 255, .08));
  color: var(--text-dim, #94a3b8);
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 13px;
  cursor: pointer;
  transition: background .15s, border-color .15s, color .15s;
  font-family: inherit;
}
.comment-react:hover,
.comment-reply-btn:hover {
  background: rgba(248, 113, 113, .1);
  border-color: rgba(248, 113, 113, .3);
  color: var(--text, #f1f5f9);
}
.comment-react.is-active {
  background: rgba(248, 113, 113, .18);
  border-color: var(--red-bright, #f87171);
  color: var(--red-bright, #f87171);
}
.comment-react .react-count {
  margin-left: 4px;
  font-weight: 500;
}
.comment-react[disabled] { opacity: .6; cursor: wait; }

/* ── Comment form ── */
.comment-form {
  background: linear-gradient(180deg, rgba(26, 18, 48, .6), rgba(14, 16, 36, .6));
  border: 1px solid rgba(248, 113, 113, .25);
  border-radius: 16px;
  padding: 24px 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.comment-form.is-replying {
  border-color: var(--red-bright, #f87171);
  box-shadow: 0 0 0 3px rgba(248, 113, 113, .15);
}
.comment-form-title {
  font-family: var(--display, "Bricolage Grotesque", sans-serif);
  font-size: 18px;
  font-weight: 600;
  margin: 0;
  color: var(--text, #f1f5f9);
}
.comment-form-note {
  font-size: 13px;
  color: var(--text-mute, #64748b);
  margin: 0;
  line-height: 1.5;
}
.comment-form .field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.comment-form .field > span {
  font-size: 13px;
  color: var(--text-dim, #94a3b8);
  font-weight: 500;
}
.comment-form .field em {
  color: var(--red-bright, #f87171);
  font-style: normal;
}
.comment-form textarea,
.comment-form input[type="text"] {
  background: rgba(255, 255, 255, .04);
  border: 1px solid var(--line-strong, rgba(255, 255, 255, .14));
  border-radius: 10px;
  padding: 12px 14px;
  font-family: inherit;
  font-size: 14px;
  color: var(--text, #f1f5f9);
  width: 100%;
  transition: border-color .2s, background .2s;
}
.comment-form textarea {
  resize: vertical;
  min-height: 96px;
  line-height: 1.5;
}
.comment-form textarea:focus,
.comment-form input[type="text"]:focus {
  outline: 0;
  border-color: var(--red-bright, #f87171);
  background: rgba(255, 255, 255, .06);
}

/* Honeypot — invisible to humans, visible to bots */
.hp-field {
  position: absolute !important;
  left: -10000px !important;
  width: 1px !important;
  height: 1px !important;
  opacity: 0 !important;
  pointer-events: none !important;
}

/* ── Captcha row ── */
.comment-captcha {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: end;
}
.captcha-img-wrap {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.captcha-img-wrap img {
  display: block;
  width: 180px;
  height: 60px;
  border-radius: 8px;
  border: 1px solid var(--line-strong, rgba(255, 255, 255, .14));
  background: #1a1230;
}
.captcha-refresh {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 24px; height: 24px;
  border-radius: 50%;
  background: rgba(0, 0, 0, .6);
  color: #fff;
  border: 0;
  font-size: 14px;
  cursor: pointer;
  display: grid; place-items: center;
  transition: background .15s, transform .3s;
}
.captcha-refresh:hover { background: rgba(0, 0, 0, .85); }
.captcha-refresh.is-spinning { transform: rotate(360deg); }
.captcha-input-field { min-width: 0; }

/* ── Feedback ── */
.comment-feedback {
  font-size: 13px;
  line-height: 1.5;
}
.comment-feedback:not(:empty) {
  padding: 10px 14px;
  border-radius: 8px;
}
.comment-feedback.error {
  background: rgba(220, 38, 38, .12);
  color: #fca5a5;
  border: 1px solid rgba(220, 38, 38, .3);
}
.comment-feedback.success {
  background: rgba(16, 185, 129, .12);
  color: #6ee7b7;
  border: 1px solid rgba(16, 185, 129, .3);
}

@media (max-width: 520px) {
  .comment-captcha { grid-template-columns: 1fr; }
  .captcha-img-wrap img { width: 100%; max-width: 240px; }
  .comment-replies { margin-left: 16px; padding-left: 12px; }
}

/* ============================================================
   LIGHT MODE — comments
   ============================================================ */
[data-theme="light"] .comments-title { color: #0f172a; }
[data-theme="light"] .comments-count,
[data-theme="light"] .comment-time   { color: #64748b; }
[data-theme="light"] .comments-empty {
  color: #475569;
  border-color: rgba(15, 23, 42, .08);
}
[data-theme="light"] .comment-item {
  background: #f8fafc;
  border-color: rgba(15, 23, 42, .08);
}
[data-theme="light"] .comment-item.is-reply { background: #f1f5f9; }
[data-theme="light"] .comment-author { color: #dc2626; }
[data-theme="light"] .comment-body   { color: #0f172a; }
[data-theme="light"] .comment-replies { border-left-color: rgba(220, 38, 38, .25); }
[data-theme="light"] .comment-react,
[data-theme="light"] .comment-reply-btn {
  background: #fff;
  border-color: rgba(15, 23, 42, .12);
  color: #475569;
}
[data-theme="light"] .comment-react:hover,
[data-theme="light"] .comment-reply-btn:hover {
  background: rgba(220, 38, 38, .06);
  border-color: rgba(220, 38, 38, .35);
  color: #0f172a;
}
[data-theme="light"] .comment-react.is-active {
  background: rgba(220, 38, 38, .12);
  border-color: #dc2626;
  color: #dc2626;
}
[data-theme="light"] .comment-form {
  background: #ffffff;
  border-color: rgba(15, 23, 42, .12);
  box-shadow: 0 6px 24px -16px rgba(15, 23, 42, .25);
}
[data-theme="light"] .comment-form-title { color: #0f172a; }
[data-theme="light"] .comment-form-note  { color: #64748b; }
[data-theme="light"] .comment-form .field > span { color: #475569; }
[data-theme="light"] .comment-form textarea,
[data-theme="light"] .comment-form input[type="text"] {
  background: #f8fafc;
  border-color: rgba(15, 23, 42, .14);
  color: #0f172a;
}
[data-theme="light"] .comment-form textarea:focus,
[data-theme="light"] .comment-form input[type="text"]:focus {
  background: #ffffff;
  border-color: #ef4444;
}
[data-theme="light"] .captcha-img-wrap img {
  background: #fff;
  border-color: rgba(15, 23, 42, .14);
}
[data-theme="light"] .comment-feedback.error {
  background: rgba(220, 38, 38, .10);
  color: #991b1b;
  border-color: rgba(220, 38, 38, .35);
}
[data-theme="light"] .comment-feedback.success {
  background: rgba(16, 185, 129, .10);
  color: #065f46;
  border-color: rgba(16, 185, 129, .35);
}

/* ====================================
 * POST TOC — Mục lục bài viết
 * Tự sinh từ H2/H3 trong content (xem build_toc() trong helpers.php).
 * Hiển thị khi bài có ≥ 3 headings — giúp user skim + AI hiểu cấu trúc.
 * ==================================== */
.post-toc {
  margin: 24px 0 32px;
  padding: 18px 22px;
  background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
  border: 1px solid var(--line, rgba(255,255,255,.08));
  border-left: 3px solid var(--red, #dc2626);
  border-radius: 10px;
}
.post-toc-title {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text-dim, #94a3b8);
  font-family: var(--mono, ui-monospace, monospace);
}
.post-toc-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: h2-num;
}
.post-toc-list li {
  margin: 6px 0;
  font-size: 14px;
  line-height: 1.5;
  padding-left: 32px;
  position: relative;
}
.post-toc-list li::before {
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--mono, ui-monospace, monospace);
  font-size: 12px;
  color: var(--red-bright, #f87171);
  font-weight: 600;
}
.post-toc-list .post-toc-h2 {
  counter-increment: h2-num;
  counter-reset: h3-num;
}
.post-toc-list .post-toc-h2::before {
  content: counter(h2-num) ".";
}
.post-toc-list .post-toc-h3 {
  counter-increment: h3-num;
  padding-left: 52px;
  font-size: 13px;
  color: var(--text-dim, #94a3b8);
}
.post-toc-list .post-toc-h3::before {
  content: counter(h2-num) "." counter(h3-num);
  left: 24px;
  font-size: 11px;
  color: var(--text-mute, #64748b);
}
.post-toc-list a {
  color: var(--text, #f1f5f9);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .15s, color .15s;
}
.post-toc-list a:hover {
  color: var(--red-bright, #f87171);
  border-bottom-color: currentColor;
}
[data-theme="light"] .post-toc {
  background: #f8fafc;
  border-color: rgba(15,23,42,.08);
  border-left-color: var(--red, #dc2626);
}
[data-theme="light"] .post-toc-list a { color: #0f172a; }

/* Scroll-margin để anchor link không bị header che. */
.post-content h2[id],
.post-content h3[id] { scroll-margin-top: 80px; }

/* ─── FAQ (cuối bài viết) ─── */
.post-faq { margin: 48px 0 8px; }
.post-faq-title {
  font-size: 1.5rem;
  margin: 0 0 18px;
}
.faq-item {
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 12px;
  margin-bottom: 12px;
  background: rgba(255,255,255,.03);
  overflow: hidden;
}
.faq-item > .faq-q {
  list-style: none;
  cursor: pointer;
  padding: 16px 48px 16px 18px;
  position: relative;
  font-weight: 600;
  font-size: 1.02rem;
  color: var(--text, #e5e7eb);
}
.faq-q::-webkit-details-marker { display: none; }
.faq-q::after {
  content: "+";
  position: absolute; right: 18px; top: 50%;
  transform: translateY(-50%);
  font-size: 1.4rem; font-weight: 400; line-height: 1;
  color: var(--red-bright, #f87171);
}
.faq-item[open] > .faq-q::after { content: "\2212"; /* − */ }
.faq-item[open] > .faq-q { color: var(--red-bright, #f87171); }
.faq-a {
  padding: 0 18px 18px;
  color: var(--text-dim, #9ca3af);
  line-height: 1.7;
}
[data-theme="light"] .faq-item {
  border-color: rgba(15,23,42,.1);
  background: #f8fafc;
}
[data-theme="light"] .faq-item > .faq-q { color: #0f172a; }
[data-theme="light"] .faq-a { color: #334155; }

/* ─── Author byline + hộp tác giả cuối bài ─── */
.post-meta-author { color: inherit; font-weight: 600; }
.post-meta-author:hover { color: var(--red-bright, #f87171); }

.author-box {
  display: flex;
  gap: 18px;
  margin: 48px 0 8px;
  padding: 22px;
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 16px;
  background: rgba(255,255,255,.03);
}
.author-box-avatar {
  width: 84px; height: 84px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}
.author-box-eyebrow {
  display: block;
  font-size: .72rem; letter-spacing: .08em; text-transform: uppercase;
  color: var(--red-bright, #f87171);
  margin-bottom: 4px;
}
.author-box-name {
  font-size: 1.2rem; font-weight: 700;
  color: var(--text, #e5e7eb);
}
.author-box-name:hover { color: var(--red-bright, #f87171); }
.author-box-title { margin: 2px 0 8px; font-size: .92rem; color: var(--text-dim, #9ca3af); }
.author-box-bio { margin: 0 0 10px; line-height: 1.7; color: var(--text-dim, #9ca3af); }
.author-box-more { font-size: .9rem; font-weight: 600; }

/* ─── Trang hồ sơ tác giả (/blog/author/{slug}) ─── */
.author-hero { text-align: center; padding: 40px 0 8px; }
.author-hero-avatar {
  width: 120px; height: 120px;
  border-radius: 50%; object-fit: cover;
  margin: 0 auto 16px; display: block;
  border: 3px solid rgba(255,255,255,.12);
}
.author-hero-name { font-size: 2rem; margin: 0 0 6px; }
.author-hero-title { font-size: 1.05rem; color: var(--red-bright, #f87171); margin: 0 0 14px; font-weight: 600; }
.author-hero-bio { max-width: 640px; margin: 0 auto 16px; line-height: 1.75; color: var(--text-dim, #9ca3af); }
.author-hero-social { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; font-size: .9rem; }

[data-theme="light"] .author-box {
  border-color: rgba(15,23,42,.1);
  background: #f8fafc;
}
[data-theme="light"] .author-box-name { color: #0f172a; }
[data-theme="light"] .author-box-title,
[data-theme="light"] .author-box-bio,
[data-theme="light"] .author-hero-bio { color: #334155; }

/* ============================================================
   MAGAZINE — homepage modules (nổi bật + block chuyên mục)
   ============================================================ */
#blog-home-modules { margin-top: 8px; }
#blog-home-modules[hidden] { display: none; }
.blog-hero[hidden] { display: none; }

/* ─── Khối nổi bật ─── */
.mag-featured {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  max-width: 1240px;
  margin: 0 auto 44px;
  padding: 0 24px;
}
@media (min-width: 900px) { .mag-featured { grid-template-columns: 1.7fr 1fr; align-items: stretch; } }

.mag-lead-link {
  display: block;
  color: inherit;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: rgba(255,255,255,.03);
  transition: transform .3s ease, border-color .25s, box-shadow .35s;
}
.mag-lead-link:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  box-shadow: 0 30px 70px -30px rgba(0,0,0,.6);
}
.mag-lead-media {
  aspect-ratio: 16 / 10;
  background-size: cover; background-position: center;
}
.mag-lead-media.is-empty { display: grid; place-items: center; background: var(--grad); }
.mag-lead-media.is-empty span { font-family: var(--display); font-size: 90px; color: rgba(255,255,255,.85); }
.mag-lead-body { padding: 20px 22px 24px; }
.mag-lead-title {
  font-family: var(--display);
  font-size: clamp(22px, 2.4vw, 30px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -.01em;
  margin: 12px 0 10px;
  color: var(--text);
}
.mag-lead-link:hover .mag-lead-title { color: var(--red-bright); }
.mag-lead-meta { color: var(--text-mute); margin-bottom: 12px; }
.mag-lead-author { color: var(--text-dim); font-weight: 600; }
.mag-lead-sum {
  color: var(--text-dim);
  font-size: 14.5px;
  line-height: 1.7;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ─── Tag + meta dùng chung ─── */
.mag-tag {
  align-self: flex-start;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: #fff;
  background: var(--grad);
  padding: 4px 10px;
  border-radius: 5px;
}
.mag-tag-sm { background: transparent; color: var(--red-bright); padding: 0; font-size: 10px; }
.mag-meta {
  display: flex; gap: 8px; flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: rgba(255,255,255,.82);
}
.mag-meta-sm { color: var(--text-mute); font-size: 11px; }

/* ─── Cột bài phụ ─── */
.mag-side { display: flex; flex-direction: column; height: 100%; }
.mag-side-item { flex: 1 1 0; display: flex; align-items: center; }
.mag-side-item + .mag-side-item { border-top: 1px solid var(--line); margin-top: 14px; padding-top: 14px; }
.mag-side-link { display: flex; gap: 14px; width: 100%; align-items: center; }
.mag-side-media {
  flex: 0 0 112px;
  height: 80px;
  border-radius: 10px;
  overflow: hidden;
  background-size: cover; background-position: center;
  border: 1px solid var(--line);
}
.mag-side-media.is-empty { display: grid; place-items: center; background: var(--grad); border: 0; }
.mag-side-media.is-empty span { font-family: var(--display); font-size: 28px; color: rgba(255,255,255,.85); }
.mag-side-body { min-width: 0; display: flex; flex-direction: column; }
.mag-side-title {
  font-family: var(--display);
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.35;
  margin: 5px 0 6px;
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.mag-side-link:hover .mag-side-title { color: var(--red-bright); }

/* ─── Block chuyên mục ─── */
.mag-block { max-width: 1240px; margin: 0 auto 44px; padding: 0 24px; }
.mag-block-head {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  margin: 0 auto 22px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--line);
}
.mag-block-head.wrap { max-width: 1240px; padding-left: 24px; padding-right: 24px; }
.mag-block-title {
  position: relative;
  font-family: var(--display);
  font-size: 20px;
  font-weight: 700;
  margin: 0;
  padding-left: 14px;
}
.mag-block-title::before {
  content: "";
  position: absolute; left: 0; top: 50%;
  transform: translateY(-50%);
  width: 5px; height: 22px;
  background: var(--grad);
  border-radius: 3px;
}
.mag-block-title a { color: var(--text); }
.mag-block-title a:hover { color: var(--red-bright); }
.mag-block-more { flex-shrink: 0; font-family: var(--mono); font-size: 12px; letter-spacing: .04em; color: var(--text-dim); }
.mag-block-more:hover { color: var(--red-bright); }
.mag-block-grid { display: grid; grid-template-columns: 1fr; gap: 22px; }
@media (min-width: 560px) { .mag-block-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 980px) { .mag-block-grid { grid-template-columns: repeat(4, 1fr); } }

/* ============================================================
   SEARCH — tìm kiếm bài viết
   ============================================================ */
/* Thanh điều hướng: filter pills (trái) + nút mở tìm kiếm (phải) */
.blog-nav {
  display: flex;
  align-items: center;
  gap: 14px;
  max-width: 1240px;
  margin: 28px auto 30px;
  padding: 0 24px;
}
.blog-search-toggle {
  flex-shrink: 0;
  width: 42px; height: 42px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--line);
  color: var(--text-dim);
  cursor: pointer;
  transition: background .15s, border-color .15s, color .15s;
}
.blog-search-toggle:hover { border-color: var(--red-bright); color: var(--red-bright); }
.blog-search-toggle svg { width: 18px; height: 18px; }

/* Overlay tìm kiếm (bật khi click icon kính lúp) */
.blog-search-overlay {
  position: fixed; inset: 0; z-index: 1200;
  display: flex; align-items: flex-start; justify-content: center;
  padding: 120px 24px 24px;
  background: rgba(8,13,31,.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.blog-search-overlay[hidden] { display: none; }
.blog-search-close {
  position: absolute; top: 24px; right: 24px;
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: rgba(255,255,255,.06);
  border: 1px solid var(--line);
  color: var(--text);
  font-size: 26px; line-height: 1;
  cursor: pointer;
  transition: border-color .15s, color .15s;
}
.blog-search-close:hover { border-color: var(--red-bright); color: var(--red-bright); }
[data-theme="light"] .blog-search-overlay { background: rgba(241,245,249,.94); }

.blog-search {
  width: 100%;
  max-width: 640px;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 10px;
}
@media (max-width: 600px) {
  .blog-search-overlay { padding-top: 84px; }
}
.blog-search-box {
  position: relative;
  flex: 1;
  display: flex;
  align-items: center;
}
.blog-search-icon {
  position: absolute;
  left: 16px;
  width: 18px; height: 18px;
  color: var(--text-mute);
  pointer-events: none;
}
.blog-search input[type="search"] {
  width: 100%;
  padding: 12px 42px 12px 44px;
  border-radius: 999px;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--line);
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  transition: border-color .2s, background .2s;
}
.blog-search input[type="search"]::placeholder { color: var(--text-mute); }
.blog-search input[type="search"]:focus {
  outline: 0;
  border-color: var(--red-bright);
  background: rgba(255,255,255,.06);
}
/* Bỏ nút × mặc định của trình duyệt — dùng nút custom .blog-search-clear */
.blog-search input[type="search"]::-webkit-search-cancel-button { -webkit-appearance: none; appearance: none; }
.blog-search-clear {
  position: absolute;
  right: 8px;
  width: 28px; height: 28px;
  display: grid; place-items: center;
  border: 0;
  border-radius: 50%;
  background: rgba(255,255,255,.06);
  color: var(--text-dim);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  transition: background .15s, color .15s;
}
.blog-search-clear:hover { background: rgba(220,38,38,.12); color: var(--red-bright); }
.blog-search-btn {
  flex-shrink: 0;
  padding: 0 22px;
  border: 0;
  border-radius: 999px;
  background: var(--grad);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  box-shadow: var(--shadow-red);
  transition: filter .15s, transform .15s;
}
.blog-search-btn:hover { filter: brightness(1.08); transform: translateY(-1px); }
[data-theme="light"] .blog-search input[type="search"] { background: #fff; }
[data-theme="light"] .blog-search-clear { background: rgba(15,23,42,.06); }
@media (max-width: 480px) {
  .blog-search-btn { padding: 0 16px; }
}

/* ============================================================
   TOOLBAR — đổi layout Card / List
   ============================================================ */
.blog-toolbar {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px 6px;
  display: flex;
  justify-content: flex-end;
}
.view-toggle {
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--line);
  border-radius: 12px;
}
.view-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 34px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--text-mute);
  cursor: pointer;
  transition: background .15s, color .15s;
}
.view-toggle-btn:hover { color: var(--text); }
.view-toggle-btn.is-active {
  background: var(--grad);
  color: #fff;
}
.view-toggle-btn svg { width: 18px; height: 18px; }
[data-theme="light"] .view-toggle { background: #fff; }

/* ─── Layout dạng danh sách (ngang) ─── */
.post-grid.is-list {
  grid-template-columns: 1fr;
  gap: 16px;
}
.post-grid.is-list .post-card-link {
  display: flex;
  align-items: stretch;
}
.post-grid.is-list .post-card-cover {
  flex: 0 0 clamp(150px, 26%, 280px);
  aspect-ratio: 16 / 11;
}
.post-grid.is-list .post-card-cover-empty span { font-size: 44px; }
.post-grid.is-list .post-card-body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  padding: 18px 22px;
}
.post-grid.is-list .post-card-cat { align-self: flex-start; }
.post-grid.is-list .post-card-title { font-size: 21px; }
.post-grid.is-list .post-card-summary {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.post-grid.is-list .post-card-meta { margin-top: auto; }
@media (max-width: 600px) {
  .post-grid.is-list .post-card-link { flex-direction: column; }
  .post-grid.is-list .post-card-cover { flex-basis: auto; aspect-ratio: 16 / 10; }
}

/* ─── Lazy-load: sentinel + spinner ─── */
.blog-loadmore {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 28px 0 8px;
  min-height: 48px;
}
.blog-loadmore-spinner {
  width: 26px; height: 26px;
  border: 3px solid var(--line-strong, rgba(255,255,255,.14));
  border-top-color: var(--red-bright, #f87171);
  border-radius: 50%;
  opacity: 0;
  transition: opacity .2s;
}
.blog-loadmore.is-loading .blog-loadmore-spinner {
  opacity: 1;
  animation: blog-spin .7s linear infinite;
}
@keyframes blog-spin { to { transform: rotate(360deg); } }