/* ═══════════════════════════════════════
   KIEN THUC PAGE STYLES
═══════════════════════════════════════ */

/* ── PAGE HERO ── */
.kt-hero {
  min-height: 420px;
  display: flex; align-items: center;
  position: relative; overflow: hidden;
  padding: 140px 0 80px;
  background: var(--bg-2);
}
.kt-hero__bg { position: absolute; inset: 0; pointer-events: none; }
.kt-hero__inner { position: relative; z-index: 1; max-width: 700px; }
.kt-hero__label {
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--red); margin-bottom: 16px;
}
.kt-hero__title {
  font-family: var(--ff-display);
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 900; line-height: 0.95;
  color: var(--text); margin-bottom: 20px;
}
.kt-hero__title em {
  font-style: italic;
  background: linear-gradient(135deg, var(--red), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.kt-hero__desc {
  color: var(--text-3); font-size: 1rem;
  line-height: 1.75; margin-bottom: 32px;
  max-width: 560px;
}
.kt-hero__stats {
  display: flex; gap: 40px; flex-wrap: wrap;
}
.kt-stat span {
  display: block;
  font-family: var(--ff-display);
  font-size: 2.2rem; font-weight: 900;
  color: var(--red); line-height: 1;
}
.kt-stat p {
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text-3); margin-top: 4px;
}

/* ── MAIN LAYOUT ── */
.kt-main { padding: 72px 0 100px; background: var(--bg); }
.kt-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 380px;
  gap: 48px;
  align-items: start;
}

/* ── TABS ── */
.kt-tabs {
  display: flex; gap: 8px;
  flex-wrap: wrap; margin-bottom: 24px;
}
.kt-tab {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 20px;
  border: 1.5px solid var(--border);
  background: transparent; color: var(--text-3);
  border-radius: 100px; font-family: var(--ff-body);
  font-size: 12px; font-weight: 600;
  cursor: none; transition: var(--t);
}
.kt-tab:hover { border-color: var(--red); color: var(--text); }
.kt-tab.active {
  background: var(--red); border-color: var(--red);
  color: #fff; box-shadow: 0 4px 16px var(--red-glow);
}
.kt-tab__count {
  background: rgba(255,255,255,0.2);
  border-radius: 100px; padding: 1px 7px;
  font-size: 10px; font-weight: 700;
}
.kt-tab.active .kt-tab__count { background: rgba(255,255,255,0.25); }

/* ── CATEGORY FILTER ── */
.kt-catfilter {
  display: none; gap: 6px;
  flex-wrap: wrap; margin-bottom: 28px;
}
.kt-catfilter.visible { display: flex; }
.kt-cat {
  padding: 5px 14px;
  border: 1px solid var(--border);
  background: transparent; color: var(--text-3);
  border-radius: 100px; font-family: var(--ff-body);
  font-size: 11px; font-weight: 600;
  cursor: none; transition: var(--t);
}
.kt-cat:hover { border-color: var(--red); color: var(--text); }
.kt-cat.active { background: var(--red); border-color: var(--red); color: #fff; }

/* ── FEATURED ARTICLE ── */
.kt-featured {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 28px;
  transition: transform var(--t), border-color var(--t), box-shadow var(--t);
}
.kt-featured:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow);
}
.kt-featured__img {
  position: relative;
  aspect-ratio: 1/1;
  background: var(--bg-4);
  overflow: hidden;
}
.kt-featured__img img {
  width: 100%; height: 100%;
  object-fit: contain;
  transition: transform .5s ease;
}
.kt-featured:hover .kt-featured__img img { transform: scale(1.05); }
.kt-featured__badge {
  position: absolute; top: 14px; left: 14px;
  padding: 5px 14px; border-radius: 100px;
  background: var(--red); color: #fff;
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.04em;
}
.kt-featured__body {
  padding: 28px;
  display: flex; flex-direction: column;
  justify-content: center; gap: 12px;
}
.kt-featured__cat {
  font-size: 10px; font-weight: 700;
  letter-spacing: 0.15em; text-transform: uppercase;
  color: var(--red);
}
.kt-featured__body h2 {
  font-family: var(--ff-display);
  font-size: 1.4rem; font-weight: 900;
  color: var(--text); line-height: 1.3;
}
.kt-featured__body p {
  font-size: .88rem; color: var(--text-3);
  line-height: 1.7;
}
.kt-featured__meta {
  display: flex; gap: 14px;
  font-size: .75rem; color: var(--text-dim);
  flex-wrap: wrap;
}

/* ── ARTICLE LIST ── */
.kt-list { display: flex; flex-direction: column; gap: 16px; }
.kt-item {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 20px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--t), border-color var(--t), box-shadow var(--t);
}
.kt-item:hover {
  transform: translateX(6px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow);
}
.kt-item.hidden { display: none; }

.kt-item__img {
  position: relative;
  aspect-ratio: 4/3;
  background: var(--bg-4);
  overflow: hidden;
  flex-shrink: 0;
}
.kt-item__img img {
  width: 100%; height: 100%;
  object-fit: contain;
  transition: transform .5s ease;
}
.kt-item:hover .kt-item__img img { transform: scale(1.06); }
.kt-item__badge {
  position: absolute; top: 8px; left: 8px;
  width: 28px; height: 28px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px;
  backdrop-filter: blur(8px);
}
.kt-item__badge.news { background: rgba(230,48,34,0.8); }
.kt-item__badge.knowledge { background: rgba(99,179,237,0.8); }

.kt-item__body {
  padding: 18px 20px 18px 0;
  display: flex; flex-direction: column; gap: 6px;
}
.kt-item__cat {
  font-size: 10px; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--red);
}
.kt-item__body h3 {
  font-size: .95rem; font-weight: 700;
  color: var(--text); line-height: 1.4;
}
.kt-item__body p {
  font-size: .8rem; color: var(--text-3);
  line-height: 1.6; flex: 1;
}
.kt-item__meta {
  display: flex; gap: 12px;
  font-size: .72rem; color: var(--text-dim);
}

/* ── PAGINATION ── */
.kt-pagination {
  display: flex; flex-wrap: wrap;
  justify-content: center; gap: 10px;
  margin-top: 32px;
}
.kt-page-btn {
  width: 38px; height: 38px;
  border-radius: 50%;
  background: var(--bg-3);
  border: 1px solid var(--border);
  color: var(--text-2);
  font-family: var(--ff-body);
  font-size: 14px; font-weight: 600;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: all var(--t);
}
.kt-page-btn:hover {
  background: transparent;
  border-color: var(--red);
  color: var(--red);
}
.kt-page-btn.active {
  background: var(--red);
  border-color: var(--red);
  color: #fff;
}

/* ── SIDEBAR ── */
.kt-sidebar { position: sticky; top: 100px; display: flex; flex-direction: column; gap: 24px; }

.kt-widget {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.kt-widget__title {
  font-size: .85rem; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text-2); margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.kt-widget__list { display: flex; flex-direction: column; gap: 14px; }
.kt-widget__item {
  display: grid; grid-template-columns: 56px 1fr;
  gap: 12px; align-items: center;
  transition: opacity var(--t);
}
.kt-widget__item:hover { opacity: .75; }
.kt-widget__img {
  width: 56px; height: 42px;
  border-radius: var(--radius-sm);
  overflow: hidden; background: var(--bg-4);
  flex-shrink: 0;
}
.kt-widget__img img { width: 100%; height: 100%; object-fit: contain; }
.kt-widget__item p {
  font-size: .8rem; color: var(--text-2);
  line-height: 1.4; font-weight: 500;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.kt-widget__item span {
  font-size: .7rem; color: var(--text-dim);
}

/* ── CATEGORIES GRID ── */
.kt-categories {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.kt-cat-btn {
  display: flex;
  align-items: center;
  gap: 10px;

  padding: 14px 16px;

  min-width: 0;
}

.kt-cat-btn__icon {
  flex-shrink: 0;
}

.kt-cat-btn__name {
  flex: 1;

  font-size: 13px;
  font-weight: 600;

  color: var(--text-2);

  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.kt-cat-btn__count {
  flex-shrink: 0;
  margin-left: auto;
}

/* Tablet */
@media (max-width: 1100px) {
  .kt-layout {
    grid-template-columns: minmax(0, 1fr) 300px;
  }
}

/* Mobile */
@media (max-width: 768px) {
  .kt-categories {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 520px) {
  .kt-categories {
    grid-template-columns: 1fr;
  }
}

/* ── TAGS ── */
.kt-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.kt-tags span {
  padding: 4px 12px;
  background: var(--bg-4);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 11px; font-weight: 500;
  color: var(--text-3); cursor: default;
  transition: var(--t);
}
.kt-tags span:hover {
  border-color: var(--red); color: var(--text);
}

/* ═══ ARTICLE DETAIL ═══ */
.art-hero {
  padding: 140px 0 60px;
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
}
.art-hero__back { margin-bottom: 24px; }
.art-hero__meta {
  display: flex; gap: 10px; align-items: center;
  margin-bottom: 16px; flex-wrap: wrap;
}
.art-type {
  padding: 4px 14px; border-radius: 100px;
  font-size: 11px; font-weight: 700;
}
.art-type.news { background: rgba(230,48,34,0.15); color: var(--red); border: 1px solid rgba(230,48,34,0.3); }
.art-type.knowledge { background: rgba(99,179,237,0.15); color: #63B3ED; border: 1px solid rgba(99,179,237,0.3); }
.art-cat {
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-3);
}
.art-hero__title {
  font-family: var(--ff-display);
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 900; color: var(--text);
  line-height: 1.15; margin-bottom: 18px;
}
.art-hero__desc {
  font-size: 1.05rem; color: var(--text-3);
  max-width: 680px; line-height: 1.75; margin-bottom: 24px;
}
.art-hero__info {
  display: flex; gap: 20px;
  font-size: .82rem; color: var(--text-dim);
  flex-wrap: wrap;
}
.art-cover {
  width: 100%; height: auto; display: block;
  border-radius: var(--radius);
  margin: 40px 0; border: 1px solid var(--border);
  background: var(--bg-4);
}

/* ── ARTICLE LAYOUT ── */
.art-body { padding: 60px 0 100px; background: var(--bg); }
.art-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 48px; align-items: start;
}
.art-sidebar { position: sticky; top: 100px; display: flex; flex-direction: column; gap: 20px; }

/* ── ARTICLE CONTENT ── */
.art-content {
  font-size: .98rem; color: var(--text-3);
  line-height: 1.85;
}
.art-content h2 {
  font-family: var(--ff-display);
  font-size: 1.6rem; font-weight: 900;
  color: var(--text); margin: 40px 0 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid rgba(230,48,34,0.2);
}
.art-content h3 {
  font-size: 1.15rem; font-weight: 700;
  color: var(--text); margin: 28px 0 12px;
}
.art-content p { margin-bottom: 18px; }
.art-content strong { color: var(--text); }
.art-content em { color: var(--red); font-style: normal; }
.art-content ul, .art-content ol {
  padding-left: 0; margin-bottom: 20px;
  display: flex; flex-direction: column; gap: 8px;
}
.art-content li {
  padding-left: 20px; position: relative;
  font-size: .92rem;
}
.art-content ul li::before {
  content: '';
  position: absolute; left: 0; top: 9px;
  width: 5px; height: 5px;
  background: var(--red); border-radius: 50%;
}
.art-content ol { counter-reset: list; }
.art-content ol li::before {
  content: counter(list) '.';
  counter-increment: list;
  position: absolute; left: 0;
  color: var(--red); font-weight: 700; font-size: .8rem;
}
.art-content blockquote {
  border-left: 3px solid var(--red);
  padding: 16px 20px; margin: 24px 0;
  background: rgba(230,48,34,0.05);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic; color: var(--text-2);
}
.art-content .highlight-box {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
  margin: 24px 0;
}

/* ── ARTICLE LINKS ── */
.art-content a {
  color: var(--red);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 600;
  transition: opacity var(--t);
}
.art-content a:hover {
  opacity: 0.8;
}
.art-content .read-more-box {
  display: flex; flex-direction: column; gap: 6px;
  background: rgba(230,48,34,0.05);
  border-left: 3px solid var(--red);
  padding: 16px 20px; margin: 28px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.art-content .read-more-box span {
  color: var(--text-2); font-size: 0.9rem;
}
.art-content .read-more-box a {
  text-decoration: none; font-size: 1.05rem;
}
.art-content .read-more-box a:hover {
  text-decoration: underline;
}

/* ── ARTICLE WIDGETS ── */
.art-widget {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius); padding: 22px;
}
.art-widget h3 {
  font-size: .82rem; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text-2); margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

/* Share buttons */
.art-share { display: flex; flex-direction: column; gap: 8px; }
.share-btn {
  display: block; text-align: center;
  padding: 9px 16px; border-radius: var(--radius-sm);
  font-size: 12px; font-weight: 700;
  cursor: none; transition: var(--t); border: none;
  font-family: var(--ff-body);
}
.share-btn.facebook { background: rgba(24,119,242,0.15); color: #1877F2; border: 1px solid rgba(24,119,242,0.3); }
.share-btn.facebook:hover { background: rgba(24,119,242,0.25); }
.share-btn.linkedin { background: rgba(10,102,194,0.15); color: #0A66C2; border: 1px solid rgba(10,102,194,0.3); }
.share-btn.linkedin:hover { background: rgba(10,102,194,0.25); }
.share-btn.copy { background: var(--bg-4); color: var(--text-2); border: 1px solid var(--border); cursor: none; }
.share-btn.copy:hover { border-color: var(--red); color: var(--red); }

/* Related */
.art-related { display: flex; flex-direction: column; gap: 14px; }
.art-related__item {
  display: grid; grid-template-columns: 52px 1fr;
  gap: 10px; align-items: center;
  transition: opacity var(--t);
}
.art-related__item:hover { opacity: .75; }
.art-related__img {
  width: 52px; height: 40px;
  border-radius: var(--radius-sm);
  overflow: hidden; background: var(--bg-4);
}
.art-related__img img { width: 100%; height: 100%; object-fit: contain; }
.art-related__cat {
  display: block; font-size: 9px; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--red); margin-bottom: 3px;
}
.art-related__item p {
  font-size: .78rem; color: var(--text-2);
  line-height: 1.4; font-weight: 500;
}

/* CTA widget */
.art-cta-widget {
  background: linear-gradient(135deg, rgba(230,48,34,0.08), rgba(255,107,53,0.05));
  border-color: rgba(230,48,34,0.2);
  text-align: center;
}
.art-cta-widget p {
  font-size: .88rem; color: var(--text-3);
  margin-bottom: 14px; line-height: 1.6;
}

/* ── NO IMAGE FALLBACK ── */
.no-img { background: var(--bg-4) !important; min-height: 120px; }

/* ── RESPONSIVE ── */
@media (max-width: 1024px) {
  .kt-layout { grid-template-columns: 1fr; }
  .kt-sidebar { position: static; }
  .art-layout { grid-template-columns: 1fr; }
  .art-sidebar { position: static; }
  .kt-featured { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .kt-hero { padding: 110px 0 60px; }
  .kt-item { grid-template-columns: 110px 1fr; }
  .kt-categories { grid-template-columns: 1fr 1fr; }
  .kt-hero__stats { gap: 24px; }
}
@media (max-width: 480px) {
  .kt-item { grid-template-columns: 1fr; }
  .kt-item__body { padding: 16px; }
}
/* ======================
   ANTI COPY
====================== */

body {
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
img {
  -webkit-user-drag: none;
  user-drag: none;
  pointer-events: none;
}
button,
a,
.btn,
input,
textarea {
  pointer-events: auto;
}
body::after {
  content: "DECAZ TRẦN";
  position: fixed;
  inset: 0;

  display: flex;
  align-items: center;
  justify-content: center;

  font-size: 10vw;
  font-weight: 900;

  opacity: 0.02;

  pointer-events: none;

  z-index: 999999;

  transform: rotate(-20deg);
}