/* ============================================================
   Tiếng Việt — Nội dung Ôn luyện Design System
   Prefix: .tvtl-page
   Chủ đề: Tiếng Việt tiểu học — Ôn luyện
   ============================================================ */

.tvtl-page {
  /* --- Palette Tiếng Việt --- */
  --tvtl-primary:        #4f46e5;   /* indigo — ngôn ngữ */
  --tvtl-primary-light:  #6366f1;
  --tvtl-primary-dark:   #3730a3;
  --tvtl-accent:         #e11d48;   /* hồng đỏ — nhấn mạnh */
  --tvtl-gold:           #b45309;
  --tvtl-gold-light:     #f59e0b;
  --tvtl-text:           #1c1917;
  --tvtl-text-secondary: #374151;
  --tvtl-muted:          #6b7280;
  --tvtl-border:         #e0e7ff;
  --tvtl-border-accent:  #a5b4fc;
  --tvtl-bg-warm:        #eef2ff;
  --tvtl-bg-surface:     #f8f9ff;
  --tvtl-shadow-sm:      0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --tvtl-shadow:         0 4px 16px rgba(0,0,0,0.07), 0 1px 4px rgba(0,0,0,0.04);
  --tvtl-shadow-lg:      0 12px 40px rgba(0,0,0,0.09), 0 4px 12px rgba(0,0,0,0.05);
  --tvtl-radius:         16px;
  --tvtl-radius-lg:      24px;

  /* Màu 8 chủ đề */
  --tvtl-t1: #0284c7;   /* xanh dương — đọc hiểu */
  --tvtl-t2: #7c3aed;   /* tím — dấu câu, kiểu câu */
  --tvtl-t3: #0d9488;   /* teal — thành phần câu */
  --tvtl-t4: #15803d;   /* xanh lá — từ và nghĩa */
  --tvtl-t5: #d97706;   /* cam — từ loại */
  --tvtl-t6: #dc2626;   /* đỏ — tu từ & cảm thụ */
  --tvtl-t7: #4338ca;   /* indigo — chính tả */
  --tvtl-t8: #059669;   /* emerald — viết đoạn */

  font-size: 1rem;
  line-height: 1.7;
  color: var(--tvtl-text);
}

/* ---- Transitions ---- */
.tvtl-page .tvtl-event-card,
.tvtl-page .accordion-item {
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}

/* ============================================================
   Hero
   ============================================================ */
.tvtl-page .tvtl-hero {
  margin-bottom: 48px;
}
.tvtl-page .tvtl-hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 32px;
}
@media (max-width: 900px) {
  .tvtl-page .tvtl-hero-inner { grid-template-columns: 1fr; }
}

.tvtl-page .tvtl-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 999px;
  background: var(--tvtl-bg-warm);
  color: var(--tvtl-primary);
  font-size: 0.92rem;
  font-weight: 700;
  border: 1px solid var(--tvtl-border-accent);
  margin-bottom: 18px;
  letter-spacing: 0.01em;
}

.tvtl-page .tvtl-hero-left h1 {
  font-size: clamp(1.7rem, 3vw, 2.5rem);
  line-height: 1.15;
  letter-spacing: -0.025em;
  margin: 0 0 16px;
  font-weight: 800;
  color: var(--tvtl-primary);
}

.tvtl-page .tvtl-hero-left p {
  color: var(--tvtl-text-secondary);
  font-size: 1.05rem;
  margin: 0 0 20px;
  line-height: 1.75;
}

.tvtl-page .tvtl-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}

.tvtl-page .tvtl-hero-note {
  background: var(--tvtl-bg-warm);
  border: 1px solid var(--tvtl-border-accent);
  border-radius: 10px;
  padding: 12px 18px;
  font-size: 0.93rem;
  color: var(--tvtl-primary-dark);
  line-height: 1.6;
}

/* ---- Buttons ---- */
.tvtl-page .tvtl-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 12px;
  padding: 11px 22px;
  font-weight: 700;
  font-size: 0.97rem;
  transition: all 0.22s ease;
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none;
}
.tvtl-page .tvtl-btn-primary {
  background: var(--tvtl-primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
}
.tvtl-page .tvtl-btn-primary:hover {
  background: var(--tvtl-primary-light);
  color: #fff;
  transform: translateY(-1px);
}
.tvtl-page .tvtl-btn-outline {
  border-color: var(--tvtl-border-accent);
  background: #fff;
  color: var(--tvtl-primary);
  box-shadow: var(--tvtl-shadow-sm);
}
.tvtl-page .tvtl-btn-outline:hover {
  border-color: var(--tvtl-primary);
  background: var(--tvtl-bg-warm);
  color: var(--tvtl-primary);
}

/* ============================================================
   Hero Card (Panel)
   ============================================================ */
.tvtl-page .tvtl-hero-right {
  display: flex;
  flex-direction: column;
}
.tvtl-page .tvtl-hero-card {
  background: #fff;
  border: 1px solid var(--tvtl-border);
  border-radius: var(--tvtl-radius-lg);
  padding: 26px;
  box-shadow: var(--tvtl-shadow);
  position: relative;
  overflow: hidden;
  flex: 1;
}
.tvtl-page .tvtl-hero-card::before {
  content: "";
  position: absolute;
  width: 260px;
  height: 260px;
  top: -100px;
  right: -80px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(79,70,229,0.07) 0%, transparent 70%);
  pointer-events: none;
}
.tvtl-page .tvtl-hero-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--tvtl-border);
}
.tvtl-page .tvtl-hero-card-title {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--tvtl-primary);
}
.tvtl-page .tvtl-status {
  padding: 5px 13px;
  border-radius: 10px;
  font-size: 0.84rem;
  font-weight: 700;
  background: var(--tvtl-bg-warm);
  color: var(--tvtl-primary);
  border: 1px solid var(--tvtl-border-accent);
  white-space: nowrap;
}
.tvtl-page .tvtl-topic-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.tvtl-page .tvtl-topic-row {
  display: grid;
  grid-template-columns: 62px 1fr;
  gap: 12px;
  align-items: start;
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--tvtl-bg-surface);
  border: 1px solid var(--tvtl-border);
}
.tvtl-page .tvtl-topic-row:hover {
  border-color: var(--tvtl-border-accent);
  background: var(--tvtl-bg-warm);
}
.tvtl-page .tvtl-topic-label {
  font-weight: 800;
  font-size: 0.85rem;
  line-height: 1.4;
  text-align: center;
}
.tvtl-page .tvtl-topic-label.c1 { color: var(--tvtl-t1); }
.tvtl-page .tvtl-topic-label.c2 { color: var(--tvtl-t2); }
.tvtl-page .tvtl-topic-label.c3 { color: var(--tvtl-t3); }
.tvtl-page .tvtl-topic-label.c4 { color: var(--tvtl-t4); }
.tvtl-page .tvtl-topic-label.c5 { color: var(--tvtl-t5); }
.tvtl-page .tvtl-topic-label.c6 { color: var(--tvtl-t6); }
.tvtl-page .tvtl-topic-label.c7 { color: var(--tvtl-t7); }
.tvtl-page .tvtl-topic-label.c8 { color: var(--tvtl-t8); }
.tvtl-page .tvtl-topic-row h4 {
  margin: 0 0 3px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--tvtl-text);
  line-height: 1.35;
}
.tvtl-page .tvtl-topic-row small {
  color: var(--tvtl-muted);
  font-size: 0.8rem;
}

/* ============================================================
   Section
   ============================================================ */
.tvtl-page .tvtl-section {
  margin-bottom: 44px;
}
.tvtl-page .tvtl-section-header {
  margin-bottom: 24px;
}
.tvtl-page .tvtl-section-header h2 {
  font-size: clamp(1.3rem, 2.4vw, 1.85rem);
  font-weight: 800;
  color: var(--tvtl-primary);
  line-height: 1.25;
  margin: 0 0 10px;
}
.tvtl-page .tvtl-section-header p {
  font-size: 1rem;
  color: var(--tvtl-text-secondary);
  line-height: 1.7;
  margin: 0;
}

/* ============================================================
   Topic block
   ============================================================ */
.tvtl-page .tvtl-topic-block {
  background: #fff;
  border: 1px solid var(--tvtl-border);
  border-radius: var(--tvtl-radius-lg);
  margin-bottom: 24px;
  overflow: hidden;
  box-shadow: var(--tvtl-shadow-sm);
}
.tvtl-page .tvtl-topic-block-title {
  font-size: 1.05rem;
  font-weight: 800;
  padding: 18px 24px;
  border-bottom: 1px solid var(--tvtl-border);
  color: #fff;
}
.tvtl-page .tvtl-topic-block-title.t1 { background: var(--tvtl-t1); }
.tvtl-page .tvtl-topic-block-title.t2 { background: var(--tvtl-t2); }
.tvtl-page .tvtl-topic-block-title.t3 { background: var(--tvtl-t3); }
.tvtl-page .tvtl-topic-block-title.t4 { background: var(--tvtl-t4); }
.tvtl-page .tvtl-topic-block-title.t5 { background: var(--tvtl-t5); }
.tvtl-page .tvtl-topic-block-title.t6 { background: var(--tvtl-t6); }
.tvtl-page .tvtl-topic-block-title.t7 { background: var(--tvtl-t7); }
.tvtl-page .tvtl-topic-block-title.t8 { background: var(--tvtl-t8); }

/* ============================================================
   Event grid / cards
   ============================================================ */
.tvtl-page .tvtl-event-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 18px;
  padding: 20px 22px;
}
.tvtl-page .tvtl-event-grid.tvtl-event-grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.tvtl-page .tvtl-event-grid.tvtl-event-grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
@media (max-width: 1100px) {
  .tvtl-page .tvtl-event-grid.tvtl-event-grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (max-width: 780px) {
  .tvtl-page .tvtl-event-grid.tvtl-event-grid-2 { grid-template-columns: 1fr; }
}
@media (max-width: 700px) {
  .tvtl-page .tvtl-event-grid             { grid-template-columns: 1fr; padding: 14px; }
  .tvtl-page .tvtl-event-grid.tvtl-event-grid-2 { grid-template-columns: 1fr; }
  .tvtl-page .tvtl-event-grid.tvtl-event-grid-3 { grid-template-columns: 1fr; }
  .tvtl-page .tvtl-event-card             { padding: 16px; }
  .tvtl-page .tvtl-topic-block-title      { padding: 14px 16px; }
  .tvtl-page .tvtl-table-wrap             { padding: 0 14px 14px; }
  .tvtl-page .tvtl-hero-card              { padding: 18px 16px; }
  .tvtl-page .tvtl-section               { margin-bottom: 28px; }
  .tvtl-page .tvtl-topic-block           { margin-bottom: 16px; }
  .tvtl-page .tvtl-hero-card-head        { flex-wrap: wrap; gap: 8px; }
  .tvtl-page .tvtl-event-card-top        { flex-wrap: wrap; }
}
@media (max-width: 480px) {
  .tvtl-page .tvtl-hero-left h1          { font-size: 1.55rem; }
  .tvtl-page .tvtl-section-header h2     { font-size: 1.2rem; }
  .tvtl-page .tvtl-topic-block-title     { font-size: 0.95rem; }
  .tvtl-page .tvtl-event-card            { padding: 14px 12px; }
  .tvtl-page .tvtl-event-card-top h4     { font-size: 0.97rem; }
  .tvtl-page .tvtl-event-card p,
  .tvtl-page .tvtl-event-card ul,
  .tvtl-page .tvtl-event-card ol         { font-size: 0.9rem; }
  .tvtl-page .tvtl-table                 { font-size: 0.82rem; }
  .tvtl-page .tvtl-table th,
  .tvtl-page .tvtl-table td              { padding: 8px 10px; }
  .tvtl-page .tvtl-hero-card             { padding: 14px 12px; }
  .tvtl-page .tvtl-highlight-note        { padding: 10px 14px; }
  .tvtl-page .tvtl-btn                   { padding: 10px 16px; font-size: 0.9rem; }
}

.tvtl-page .tvtl-event-card {
  background: #fff;
  border: 1px solid var(--tvtl-border);
  border-radius: var(--tvtl-radius);
  padding: 20px 22px;
  box-shadow: var(--tvtl-shadow-sm);
  position: relative;
}
.tvtl-page .tvtl-event-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--tvtl-shadow);
}

/* Border top color per topic */
.tvtl-page .tvtl-event-card.t1 { border-top: 3px solid var(--tvtl-t1); }
.tvtl-page .tvtl-event-card.t2 { border-top: 3px solid var(--tvtl-t2); }
.tvtl-page .tvtl-event-card.t3 { border-top: 3px solid var(--tvtl-t3); }
.tvtl-page .tvtl-event-card.t4 { border-top: 3px solid var(--tvtl-t4); }
.tvtl-page .tvtl-event-card.t5 { border-top: 3px solid var(--tvtl-t5); }
.tvtl-page .tvtl-event-card.t6 { border-top: 3px solid var(--tvtl-t6); }
.tvtl-page .tvtl-event-card.t7 { border-top: 3px solid var(--tvtl-t7); }
.tvtl-page .tvtl-event-card.t8 { border-top: 3px solid var(--tvtl-t8); }

.tvtl-page .tvtl-event-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}
.tvtl-page .tvtl-event-card-top h4 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--tvtl-text);
  line-height: 1.3;
}
.tvtl-page .tvtl-event-tag {
  padding: 3px 10px;
  border-radius: 8px;
  font-size: 0.75rem;
  font-weight: 700;
  background: var(--tvtl-bg-warm);
  color: var(--tvtl-primary);
  border: 1px solid var(--tvtl-border-accent);
  white-space: nowrap;
  flex-shrink: 0;
}
.tvtl-page .tvtl-event-card p {
  font-size: 0.95rem;
  color: var(--tvtl-text-secondary);
  line-height: 1.7;
  margin: 0 0 10px;
}
.tvtl-page .tvtl-event-card p:last-child { margin-bottom: 0; }
.tvtl-page .tvtl-event-card ul,
.tvtl-page .tvtl-event-card ol {
  margin: 0 0 12px;
  padding-left: 22px;
  font-size: 0.95rem;
  color: var(--tvtl-text-secondary);
  line-height: 1.7;
}
.tvtl-page .tvtl-event-card li { margin-bottom: 4px; }

/* ---- Content Tags ---- */
.tvtl-page .tvtl-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 8px;
  font-size: 0.74rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.tvtl-page .tvtl-tag-khai-niem {
  background: #eff6ff;
  color: #1d4ed8;
  border: 1px solid #bfdbfe;
}
.tvtl-page .tvtl-tag-thuc-hanh {
  background: #ecfdf5;
  color: #059669;
  border: 1px solid #a7f3d0;
}
.tvtl-page .tvtl-tag-ghi-nho {
  background: #fef3c7;
  color: #b45309;
  border: 1px solid #fcd34d;
}
.tvtl-page .tvtl-tag-mau-cau {
  background: #f5f3ff;
  color: #7c3aed;
  border: 1px solid #c4b5fd;
}
.tvtl-page .tvtl-tag-de-nham {
  background: #fef2f2;
  color: #dc2626;
  border: 1px solid #fecaca;
}
.tvtl-page .tvtl-tag-hay-gap {
  background: #ecfeff;
  color: #0891b2;
  border: 1px solid #a5f3fc;
}

/* ============================================================
   Highlight note
   ============================================================ */
.tvtl-page .tvtl-highlight-note {
  background: linear-gradient(135deg, #eef2ff 0%, #f5f3ff 100%);
  border: 1px solid var(--tvtl-border-accent);
  border-left: 4px solid var(--tvtl-primary);
  border-radius: 10px;
  padding: 14px 18px;
  margin-top: 12px;
}
.tvtl-page .tvtl-highlight-note:last-child { margin-bottom: 0; }
.tvtl-page .tvtl-highlight-label {
  font-size: 0.74rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--tvtl-primary-dark);
  margin-bottom: 4px;
}
.tvtl-page .tvtl-highlight-note p {
  font-size: 0.9rem;
  color: var(--tvtl-primary-dark);
  line-height: 1.65;
  margin: 0;
  font-weight: 500;
}

/* ---- Example box (Ví dụ nhanh) ---- */
.tvtl-page .tvtl-example-box {
  background: #f8f9ff;
  border: 1px dashed var(--tvtl-border-accent);
  border-radius: 8px;
  padding: 12px 16px;
  margin-top: 10px;
  font-size: 0.92rem;
  color: var(--tvtl-text-secondary);
  line-height: 1.65;
}
.tvtl-page .tvtl-example-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--tvtl-primary);
  margin-bottom: 4px;
}
.tvtl-page .tvtl-checkbox {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.15em;
  height: 1.15em;
  border: 1.5px solid #43a047;
  border-radius: 4px;
  background: #e8f5e9;
  vertical-align: middle;
  margin-right: 0.4em;
  flex-shrink: 0;
  color: #2e7d32;
  font-size: 0.82em;
  font-weight: 900;
  line-height: 1;
}
.tvtl-page .tvtl-checkbox::after {
  content: '✓';
}
.tvtl-page li:has(> .tvtl-checkbox) {
  list-style: none;
}

/* ============================================================
   Table
   ============================================================ */
.tvtl-page .tvtl-table-wrap {
  overflow-x: auto;
  padding: 0 22px 22px;
}
.tvtl-page .tvtl-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  line-height: 1.6;
}
.tvtl-page .tvtl-table th,
.tvtl-page .tvtl-table td {
  padding: 12px 16px;
  border: 1px solid var(--tvtl-border);
  vertical-align: top;
}
.tvtl-page .tvtl-table thead th {
  background: var(--tvtl-primary);
  color: #fff;
  font-weight: 700;
  text-align: left;
}
.tvtl-page .tvtl-table tbody tr:nth-child(even) {
  background: var(--tvtl-bg-surface);
}
.tvtl-page .tvtl-table tbody tr:hover {
  background: var(--tvtl-bg-warm);
}

/* stand-alone table */
.tvtl-page > .tvtl-table-wrap {
  background: #fff;
  border: 1px solid var(--tvtl-border);
  border-radius: var(--tvtl-radius);
  margin-bottom: 24px;
  box-shadow: var(--tvtl-shadow-sm);
  padding: 18px;
}

/* ============================================================
   Steps
   ============================================================ */
.tvtl-page .tvtl-steps {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 20px 22px;
}
.tvtl-page .tvtl-step {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--tvtl-bg-surface);
  border: 1px solid var(--tvtl-border);
  border-radius: 12px;
  padding: 14px 18px;
  font-size: 0.95rem;
  color: var(--tvtl-text-secondary);
  line-height: 1.65;
  transition: border-color 0.2s;
}
.tvtl-page .tvtl-step:hover {
  border-color: var(--tvtl-border-accent);
  background: var(--tvtl-bg-warm);
}
.tvtl-page .tvtl-step > span {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  min-width: 30px;
  border-radius: 50%;
  background: var(--tvtl-primary);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 800;
  line-height: 1;
  flex-shrink: 0;
}

/* ============================================================
   FAQ Accordion
   ============================================================ */
.tvtl-page .accordion {
  border-radius: var(--tvtl-radius);
  overflow: hidden;
}
.tvtl-page .accordion-item {
  border: 1px solid var(--tvtl-border) !important;
  margin-bottom: 8px;
  border-radius: 12px !important;
  overflow: hidden;
}
.tvtl-page .accordion-item:last-child { margin-bottom: 0; }
.tvtl-page .accordion-button {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--tvtl-text);
  padding: 16px 20px;
  background: #fff;
  line-height: 1.5;
}
.tvtl-page .accordion-button:not(.collapsed) {
  background: var(--tvtl-bg-warm);
  color: var(--tvtl-primary);
  box-shadow: none;
}
.tvtl-page .accordion-button:focus {
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}
.tvtl-page .accordion-body {
  font-size: 0.93rem;
  color: var(--tvtl-text-secondary);
  line-height: 1.75;
  padding: 16px 20px;
}

/* ============================================================
   CTA Box
   ============================================================ */
.tvtl-page .tvtl-cta-box {
  display: grid;
  grid-template-columns: 1fr 2fr auto;
  align-items: center;
  gap: 28px;
  background: linear-gradient(135deg, var(--tvtl-primary-dark) 0%, var(--tvtl-primary) 100%);
  border-radius: var(--tvtl-radius-lg);
  padding: 36px 40px;
  margin-top: 32px;
}
@media (max-width: 860px) {
  .tvtl-page .tvtl-cta-box { grid-template-columns: 1fr; text-align: center; padding: 28px 20px; }
  .tvtl-page .tvtl-cta-actions { align-items: center; }
}
.tvtl-page .tvtl-cta-title h3 {
  font-size: 1.25rem;
  font-weight: 800;
  margin: 0;
  line-height: 1.35;
  color: #fff;
}
.tvtl-page .tvtl-cta-desc p {
  color: rgba(255,255,255,0.88);
  font-size: 0.95rem;
  line-height: 1.7;
  margin: 0;
}
.tvtl-page .tvtl-cta-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex-shrink: 0;
}
.tvtl-page .tvtl-btn-light {
  background: #fff;
  color: var(--tvtl-primary);
  border: 1px solid rgba(255,255,255,0.6);
  font-weight: 700;
}
.tvtl-page .tvtl-btn-ghost {
  color: #fff;
  border: 1px solid rgba(255,255,255,0.35);
  background: rgba(255,255,255,0.12);
}
.tvtl-page .tvtl-btn-ghost:hover {
  background: rgba(255,255,255,0.22);
  color: #fff;
}

/* ============================================================
   Responsive Grid Utilities
   Dùng thay thế inline display:grid;grid-template-columns:1fr 1fr
   để bảng/cặp ví dụ tự stack trên màn hình nhỏ
   ============================================================ */
.tvtl-page .tvtl-col2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
}
.tvtl-page .tvtl-col4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

/* Tablet nhỏ: bảng 4 cột → 2 cột */
@media (max-width: 720px) {
  .tvtl-page .tvtl-col4 {
    grid-template-columns: 1fr 1fr;
  }
  .tvtl-page .tvtl-col4 > *:nth-child(2n) {
    border-right: none !important;
  }
}

/* Điện thoại: bảng 2 cột → 1 cột, bảng 4 cột → 1 cột */
@media (max-width: 600px) {
  .tvtl-page .tvtl-col2 {
    grid-template-columns: 1fr;
  }
  .tvtl-page .tvtl-col2 > * {
    border-right: none !important;
  }
}
@media (max-width: 480px) {
  .tvtl-page .tvtl-col4 {
    grid-template-columns: 1fr;
  }
  .tvtl-page .tvtl-col4 > * {
    border-right: none !important;
  }
}