/* ==============================================
   COMPONENTS: Series Box, TOC, Code Block, Callouts, Sidebar Panel
   ============================================== */

/* --- Series Box --- */
.series-box {
    background: var(--color-primary-light);
    border-left: 4px solid var(--color-primary);
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
    padding: var(--space-4) var(--space-6);
    margin: var(--space-6) 0;
}

.series-box-header {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.series-box-icon {
    font-size: var(--text-2xl);
    line-height: 1;
    flex-shrink: 0;
}

.series-box-label {
    display: block;
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-primary);
    margin-bottom: var(--space-1);
}

.series-box-title {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    margin: 0 0 var(--space-1);
    line-height: var(--leading-tight);
}

.series-box-title a {
    color: var(--color-text);
    text-decoration: none;
}

.series-box-title a:hover {
    color: var(--color-primary);
}

.series-box-count {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.series-box-posts {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.series-box-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    text-decoration: none;
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.series-box-item:hover {
    background: rgba(37, 99, 235, 0.08);
    color: var(--color-primary);
}

.series-box-item:focus-visible {
    outline: 2px solid var(--color-primary, #6366f1);
    outline-offset: 2px;
}

.series-box-item.is-current {
    background: var(--color-primary);
    color: white;
    font-weight: var(--font-medium);
}

.series-item-check {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-sm);
}

.series-box-item.is-read .series-item-check::before {
    content: '✓';
    color: var(--color-success);
}

.series-box-more {
    margin-top: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: none;
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-md);
    color: var(--color-primary);
    font-size: var(--text-sm);
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.series-box-more:hover {
    background: var(--color-primary);
    color: white;
}

/* --- TOC (Table of Contents — Sidebar) --- */
.sidebar-toc {
    background: var(--color-bg-subtle);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    margin-bottom: var(--space-6);
}

.sidebar-toc-title {
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-muted);
    margin: 0 0 var(--space-3);
}

.toc-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.toc-item {
    margin-bottom: var(--space-1);
}

.toc-item-h3 {
    padding-left: var(--space-4);
}

.toc-link {
    display: block;
    padding: var(--space-1) var(--space-2);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    text-decoration: none;
    border-left: 2px solid transparent;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
    line-height: var(--leading-snug);
}

.toc-link:hover {
    color: var(--color-primary);
    background: var(--color-primary-light);
}

.toc-link.is-active {
    color: var(--color-primary);
    border-left-color: var(--color-primary);
    font-weight: var(--font-medium);
}

/* --- Sidebar Series Panel --- */
.sidebar-series-panel {
    background: var(--color-bg-subtle);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    margin-bottom: var(--space-6);
}

.sidebar-series-title {
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-muted);
    margin: 0 0 var(--space-4);
}

.sidebar-series-title a {
    color: inherit;
    text-decoration: none;
}

.sidebar-chapter {
    margin-bottom: var(--space-2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.sidebar-chapter-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: var(--color-bg);
    border: none;
    cursor: pointer;
    text-align: left;
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-text);
    transition: background var(--transition-fast);
}

.sidebar-chapter-toggle:hover {
    background: var(--color-bg-muted);
}

.sidebar-chapter-name {
    flex: 1;
}

.sidebar-chapter-count {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    background: var(--color-bg-muted);
    padding: 2px 6px;
    border-radius: var(--radius-full);
}

.sidebar-chapter-arrow {
    color: var(--color-text-subtle);
    transition: transform var(--transition-fast);
}

.sidebar-chapter.is-open .sidebar-chapter-arrow {
    transform: rotate(90deg);
}

.sidebar-chapter-posts {
    list-style: none;
    margin: 0;
    padding: 0;
    display: none;
}

.sidebar-chapter-posts.is-open {
    display: block;
}

.sidebar-post-item a {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    text-decoration: none;
    border-top: 1px solid var(--color-border-subtle);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.sidebar-post-item a:hover {
    background: var(--color-bg-muted);
    color: var(--color-primary);
}

.sidebar-post-item.is-current a {
    color: var(--color-primary);
    font-weight: var(--font-medium);
    background: var(--color-primary-light);
}

.sidebar-post-check {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-full);
    transition: background var(--transition-fast), border-color var(--transition-fast);
}

.sidebar-post-item.is-read .sidebar-post-check {
    background: var(--color-success);
    border-color: var(--color-success);
}

/* --- Code Block Override ---
   NOTE: scoped to .ghit-callout only — .ghit-codeblock (single.css) already
   owns generic <pre>/<pre code> styling; an unscoped rule here would collide. */
.ghit-callout pre {
    position: relative;
    background: var(--color-code-bg) !important;
    border-radius: var(--radius-lg) !important;
    padding: var(--space-6) !important;
    overflow-x: auto;
    margin: var(--space-6) 0 !important;
    border: 1px solid rgba(255, 255, 255, 0.1) !important;
}

.ghit-callout pre code {
    font-family: var(--font-code) !important;
    font-size: 13.5px !important;
    line-height: 1.7 !important;
    color: var(--color-code-text) !important;
    background: none !important;
    padding: 0 !important;
}

/* Language label */
pre[class*="language-"]::before {
    content: attr(data-language);
    position: absolute;
    top: var(--space-3);
    left: var(--space-4);
    font-family: var(--font-code);
    font-size: var(--text-xs);
    color: var(--color-text-subtle);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

/* Copy button */
.code-copy-btn {
    position: absolute;
    top: var(--space-2);
    right: var(--space-2);
    padding: var(--space-1) var(--space-3);
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-text-subtle);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    font-family: var(--font-body);
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast);
    white-space: nowrap;
}

.code-copy-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.code-copy-btn.copied {
    color: #86efac; /* green-300 */
    border-color: #86efac;
}

/* --- Callout Boxes --- */
.callout {
    display: flex;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    border-radius: var(--radius-lg);
    margin: var(--space-6) 0;
    border-left: 4px solid;
}

.callout-info {
    background: var(--color-primary-light);
    border-left-color: var(--color-primary);
}

.callout-warning {
    background: #fffbeb;
    border-left-color: var(--color-warning);
}

.callout-tip {
    background: #f0fdf4;
    border-left-color: var(--color-success);
}

.callout-danger {
    background: #fef2f2;
    border-left-color: var(--color-danger);
}

.callout-icon {
    font-size: var(--text-lg);
    flex-shrink: 0;
    line-height: 1.5;
}

.callout-content {
    flex: 1;
    min-width: 0;
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
}

.callout-content p:last-child {
    margin-bottom: 0;
}

/* ── ghit-callout (Block Patterns + Shortcode) ── */
.ghit-callout {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 10px 14px;
  border-radius: 16px;
  padding: 18px 20px;
  margin: 28px 0;
  border: 1px solid;
  align-items: start;
}
.ghit-callout > * {
  grid-column: 2;
  min-width: 0;
}
.ghit-callout p { margin: 0; font-size: 15px; line-height: 1.65; color: #475569; }
.ghit-callout p:last-child { margin: 0; }

/* Phòng ngừa lồng callout nhầm (2 pattern chèn vào nhau) — bỏ khung/nền lớp trong,
   tránh cộng dồn padding+border gây "hố" trắng lớn. */
.ghit-callout .ghit-callout {
  border: none;
  border-radius: 0;
  padding: 0;
  margin: 8px 0 0;
}
.ghit-callout .ghit-callout::before { display: none; }

/* Icon pseudo — cột 1, span tất cả rows */
.ghit-callout::before {
  content: '';
  grid-column: 1;
  grid-row: 1;
  align-self: start;
  width: 36px;
  height: 36px;
  border-radius: 11px;
  border: 1px solid;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  line-height: 1;
}

/* goal */
.ghit-callout--goal {
  background: linear-gradient(135deg, #F1ECFB, #EFF6FF);
  border-color: #E9D5FF;
}
.ghit-callout--goal::before {
  content: 'ℹ';
  background: #F1ECFB;
  border-color: #E9D5FF;
  color: #7C3AED;
}
.ghit-callout--goal strong { color: #5B21B6; }

/* tip */
.ghit-callout--tip {
  background: #ECFDF5;
  border-color: #A7F3D0;
}
.ghit-callout--tip::before {
  content: '💡';
  background: #ECFDF5;
  border-color: #A7F3D0;
}
.ghit-callout--tip strong { color: #0F766E; }

/* warning */
.ghit-callout--warning {
  background: #FFFBEB;
  border-color: #FDE68A;
}
.ghit-callout--warning::before {
  content: '⚠';
  background: #FFFBEB;
  border-color: #FDE68A;
  color: #B45309;
}
.ghit-callout--warning strong { color: #92400E; }

/* info */
.ghit-callout--info {
  background: #EFF6FF;
  border-color: #BFDBFE;
}
.ghit-callout--info::before {
  content: '🔔';
  background: #EFF6FF;
  border-color: #BFDBFE;
}
.ghit-callout--info strong { color: #1E40AF; }

/* ref (tài liệu tham khảo) — kiểu danh sách trích dẫn/bibliography, nhẹ nhàng hơn callout cảnh báo */
.ghit-callout--ref {
  background: #F8FAFC;
  border-color: #E2E8F0;
}
.ghit-callout--ref::before {
  content: '📚';
  background: #EFF6FF;
  border-color: #BFDBFE;
}
.ghit-callout--ref strong {
  color: #0F172A;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  font-family: var(--font-mono);
}
.ghit-callout--ref ul,
.ghit-callout--ref ol {
  list-style: none;
  counter-reset: ghit-ref;
  margin: 10px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.ghit-callout--ref li {
  counter-increment: ghit-ref;
  position: relative;
  font-size: 14.5px;
  line-height: 1.6;
  color: #334155;
  text-align: left;
  background: #fff;
  border: 1px solid #E2E8F0;
  border-radius: 10px;
  padding: 10px 14px 10px 40px;
  transition: border-color .15s, box-shadow .15s;
}
.ghit-callout--ref li:hover {
  border-color: #BFDBFE;
  box-shadow: 0 4px 12px -6px rgba(15,23,42,.15);
}
.ghit-callout--ref li::before {
  content: counter(ghit-ref);
  position: absolute;
  left: 12px;
  top: 10px;
  width: 20px;
  height: 20px;
  border-radius: 99px;
  background: #EFF6FF;
  color: #1D4ED8;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.ghit-callout--ref a {
  color: #1D4ED8;
  font-weight: 600;
  text-decoration: none;
  border-bottom: none;
}
.ghit-callout--ref a:hover { text-decoration: underline; }
.ghit-callout--ref a[href^="http"]::after {
  content: '↗';
  display: inline-block;
  margin-left: 4px;
  font-weight: 400;
  opacity: .6;
}

/* Code blocks inside callouts */
.callout .ghit-codeblock-wrap,
.callout .ghit-codeblock,
.ghit-callout .ghit-codeblock-wrap,
.ghit-callout .ghit-codeblock {
  margin-top: 10px;
  margin-bottom: 0;
}
.callout .ghit-codeblock-wrap:last-child,
.callout .ghit-codeblock:last-child,
.ghit-callout .ghit-codeblock-wrap:last-child,
.ghit-callout .ghit-codeblock:last-child {
  margin-bottom: 4px;
}

/* ══════════════════════════════════════════════
   LIGHTBOX
   ══════════════════════════════════════════════ */

#ghit-lb {
  position: fixed;
  inset: 0;
  z-index: var(--z-lightbox, 9100);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity .22s ease;
}
#ghit-lb.is-open {
  opacity: 1;
  pointer-events: all;
}

.ghit-lb__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(9, 9, 18, .92);
  backdrop-filter: blur(6px);
}

/* Stage */
.ghit-lb__stage {
  position: relative;
  z-index: 1;
  max-width: calc(100vw - 120px);
  max-height: calc(100vh - 100px);
  max-height: calc(100dvh - 100px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.ghit-lb__img {
  max-width: 100%;
  max-height: calc(100vh - 100px);
  max-height: calc(100dvh - 100px);
  object-fit: contain;
  border-radius: 12px;
  box-shadow: 0 40px 80px rgba(0,0,0,.6);
  transform-origin: center center;
  transition: transform .18s ease;
  user-select: none;
  cursor: zoom-in;
  display: block;
}
.ghit-lb__img[style*="scale(1)"] { cursor: zoom-in; }

/* Close */
.ghit-lb__close {
  position: absolute;
  top: 18px;
  right: 20px;
  z-index: 2;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.15);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background .15s;
}
.ghit-lb__close:hover { background: rgba(255,255,255,.2); }

/* Nav arrows */
.ghit-lb__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.15);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background .15s, transform .15s;
}
.ghit-lb__nav:hover { background: rgba(255,255,255,.22); }
.ghit-lb__prev { left: 18px; }
.ghit-lb__next { right: 18px; }
.ghit-lb__prev:hover { transform: translateY(-50%) translateX(-2px); }
.ghit-lb__next:hover { transform: translateY(-50%) translateX(2px); }

/* Footer: counter + caption */
.ghit-lb__footer {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 16px 24px 20px;
  background: linear-gradient(transparent, rgba(0,0,0,.55));
}
.ghit-lb__counter {
  font-family: var(--font-mono, monospace);
  font-size: 11.5px;
  font-weight: 600;
  color: rgba(255,255,255,.5);
  letter-spacing: .08em;
}
.ghit-lb__caption {
  font-size: 13.5px;
  color: rgba(255,255,255,.82);
  text-align: center;
  max-width: 600px;
  line-height: 1.5;
}
.ghit-lb__zoom-hint {
  font-size: 11px;
  color: rgba(255,255,255,.3);
}

/* Mobile */
@media (max-width: 600px) {
  .ghit-lb__stage { max-width: 100vw; }
  .ghit-lb__nav { width: 38px; height: 38px; border-radius: 10px; }
  .ghit-lb__prev { left: 8px; }
  .ghit-lb__next { right: 8px; }
  .ghit-lb__zoom-hint { display: none; }
}

/* ==============================================
   PAGE: Static page hero + content
   ============================================== */

.ghit-page-hero {
  position: relative;
  background: linear-gradient(135deg, #1E1B4B, #312E81 48%, #0F766E);
  border-radius: 26px;
  padding: 52px 56px 48px;
  overflow: hidden;
  margin-top: 28px;
  margin-bottom: 48px;
}

.ghit-page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255,255,255,.13) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: .55;
  pointer-events: none;
}

.ghit-page-hero__glow1 {
  position: absolute;
  top: -50px; right: -20px;
  width: 320px; height: 240px;
  background: radial-gradient(rgba(167,139,250,.5), transparent 70%);
  filter: blur(38px);
  pointer-events: none;
}

.ghit-page-hero__glow2 {
  position: absolute;
  bottom: -70px; left: 35%;
  width: 280px; height: 220px;
  background: radial-gradient(rgba(45,212,191,.38), transparent 70%);
  filter: blur(42px);
  pointer-events: none;
}

.ghit-page-hero__label {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: #A78BFA;
  margin-bottom: 14px;
}

.ghit-page-hero__title {
  position: relative;
  font-size: 40px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -.025em;
  line-height: 1.15;
  margin: 0 0 12px;
}

.ghit-page-hero__desc {
  position: relative;
  font-size: 16px;
  color: rgba(255,255,255,.72);
  max-width: 600px;
  line-height: 1.65;
  margin: 0;
}

.ghit-page-body {
  max-width: 780px;
  margin: 0 auto;
  padding-bottom: 72px;
}

@media (max-width: 768px) {
  .ghit-page-hero { padding: 36px 28px 32px; border-radius: 18px; }
  .ghit-page-hero__title { font-size: 30px; }
}

@media (max-width: 480px) {
  .ghit-page-hero { padding: 28px 20px 26px; border-radius: 14px; }
  .ghit-page-hero__title { font-size: 24px; }
  .ghit-page-hero__desc { font-size: 14.5px; }
}

/* ── Page 2-col layout ── */
.ghit-page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 40px;
  align-items: start;
  padding-bottom: 72px;
}

.ghit-page-content {
  min-width: 0;
}

.ghit-page-sidebar {
  position: sticky;
  top: calc(var(--topbar-h) + var(--header-h) + 20px);
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: 20px;
}


@media (max-width: 900px) {
  .ghit-page-layout {
    grid-template-columns: 1fr;
  }
  .ghit-page-sidebar {
    position: static;
  }
}

/* ── Contact Form 7 override ── */
.wpcf7-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.wpcf7-form label {
  display: flex;
  flex-direction: column;
  gap: 7px;
  font-size: 14px;
  font-weight: 600;
  color: #334155;
  margin: 0;
}

.wpcf7-form .wpcf7-form-control-wrap {
  display: block;
}

.wpcf7-form input[type="text"],
.wpcf7-form input[type="email"],
.wpcf7-form textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid #E2E8F0;
  border-radius: 10px;
  font-family: var(--font-sans);
  font-size: 14.5px;
  color: #0F172A;
  background: #FAFAFA;
  outline: none;
  transition: border-color .15s, box-shadow .15s, background .15s;
  box-sizing: border-box;
}

.wpcf7-form input[type="text"]:focus,
.wpcf7-form input[type="email"]:focus,
.wpcf7-form textarea:focus {
  border-color: var(--color-purple);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(124,58,237,.12);
}

.wpcf7-form textarea {
  min-height: 130px;
  resize: vertical;
  line-height: 1.6;
}

/* Validation error state */
.wpcf7-form input.wpcf7-not-valid,
.wpcf7-form textarea.wpcf7-not-valid {
  border-color: #EF4444;
  background: #FFF5F5;
  box-shadow: 0 0 0 3px rgba(239,68,68,.1);
}

.wpcf7-not-valid-tip {
  display: block;
  margin-top: 5px;
  font-size: 12.5px;
  font-weight: 500;
  color: #EF4444;
}

/* Submit button */
.wpcf7-form input[type="submit"] {
  align-self: flex-start;
  padding: 11px 28px;
  background: var(--color-purple);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 14.5px;
  font-weight: 700;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: background .15s, transform .1s, box-shadow .15s;
  box-shadow: 0 2px 10px rgba(124,58,237,.25);
}

.wpcf7-form input[type="submit"]:hover {
  background: #6D28D9;
  box-shadow: 0 4px 16px rgba(124,58,237,.35);
  transform: translateY(-1px);
}

.wpcf7-form input[type="submit"]:active {
  transform: translateY(0);
}

/* Spinner */
.wpcf7-spinner {
  display: inline-block;
  margin-left: 10px;
  vertical-align: middle;
}

/* Response messages */
.wpcf7-response-output {
  margin: 0 !important;
  padding: 12px 16px !important;
  border-radius: 10px !important;
  font-size: 14px !important;
  font-weight: 500 !important;
  border: none !important;
}

.wpcf7-form.sent .wpcf7-response-output {
  background: #F0FDF4;
  color: #15803D;
  border: 1.5px solid #BBF7D0 !important;
}

.wpcf7-form.failed .wpcf7-response-output,
.wpcf7-form.aborted .wpcf7-response-output,
.wpcf7-form.spam .wpcf7-response-output {
  background: #FFF5F5;
  color: #DC2626;
  border: 1.5px solid #FECACA !important;
}

.wpcf7-form.invalid .wpcf7-response-output {
  background: #FFFBEB;
  color: #B45309;
  border: 1.5px solid #FDE68A !important;
}

/* --- App promo card (sidebar: homepage + single post) ---
   Cấu trúc "glowing rotating border": .ghit-app-promo (outer, padding=độ dày viền)
   chứa .ghit-app-promo__spin (conic-gradient xoay tràn viền) phía sau
   .ghit-app-promo__inner (nội dung thật, nền đặc che phần giữa, chỉ để lộ viền xoay). */
.ghit-app-promo {
  position: relative;
  display: block;
  padding: 2.5px;
  border-radius: 18px;
  overflow: hidden;
  text-decoration: none;
  box-shadow: 0 22px 46px -18px rgba(234,88,12,.6);
  transition: transform var(--t-fast), box-shadow var(--t-fast);
}
.ghit-app-promo:hover {
  transform: translateY(-3px) scale(1.015);
  box-shadow: 0 30px 58px -14px rgba(234,88,12,.8);
}
.ghit-app-promo__spin {
  position: absolute;
  inset: -60%;
  background: conic-gradient(from 0deg, #FBBF24, #F97316, #F43F5E, #EC4899, #FBBF24);
  animation: ghit-app-promo-spin 3.5s linear infinite;
}
@keyframes ghit-app-promo-spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  .ghit-app-promo__spin { animation: none; }
}
.ghit-app-promo__inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15.5px;
  border-radius: 16px;
  background: linear-gradient(135deg, #F97316 0%, #EA580C 45%, #DB2777 100%);
  overflow: hidden;
}
.ghit-app-promo__inner::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 30%, rgba(255,255,255,.28) 45%, rgba(255,255,255,.28) 50%, transparent 65%);
  background-size: 250% 250%;
  background-position: 200% 0;
  pointer-events: none;
  animation: ghit-app-promo-shimmer 2.6s ease-in-out infinite;
}
@keyframes ghit-app-promo-shimmer {
  0%   { background-position: 200% 0; }
  55%  { background-position: -50% 0; }
  100% { background-position: -50% 0; }
}
@media (prefers-reduced-motion: reduce) {
  .ghit-app-promo__inner::after { animation: none; }
}
.ghit-app-promo__badge {
  position: absolute;
  top: 6px;
  right: 10px;
  z-index: 2;
  padding: 3px 9px;
  border-radius: 99px;
  background: linear-gradient(90deg, #FBBF24, #FDE047);
  color: #7C2D12;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .04em;
  box-shadow: 0 0 14px rgba(253,224,71,.8);
  animation: ghit-app-promo-badge 1.1s ease-in-out infinite;
}
@keyframes ghit-app-promo-badge {
  0%, 100% { transform: scale(1) rotate(-2deg); }
  50%      { transform: scale(1.15) rotate(2deg); }
}
@media (prefers-reduced-motion: reduce) {
  .ghit-app-promo__badge { animation: none; }
}
.ghit-app-promo__glow {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}
.ghit-app-promo__glow--1 {
  top: -45%;
  right: -15%;
  width: 150px;
  height: 150px;
  background: radial-gradient(circle, rgba(253,224,71,.55), transparent 70%);
  animation: ghit-app-promo-glow1 2.4s ease-in-out infinite;
}
.ghit-app-promo__glow--2 {
  bottom: -60%;
  left: -10%;
  width: 130px;
  height: 130px;
  background: radial-gradient(circle, rgba(255,255,255,.35), transparent 70%);
  animation: ghit-app-promo-glow2 3s ease-in-out infinite;
}
@keyframes ghit-app-promo-glow1 {
  0%, 100% { opacity: .7; transform: scale(1); }
  50%      { opacity: 1; transform: scale(1.3); }
}
@keyframes ghit-app-promo-glow2 {
  0%, 100% { opacity: .4; transform: scale(1); }
  50%      { opacity: .8; transform: scale(1.35); }
}
@media (prefers-reduced-motion: reduce) {
  .ghit-app-promo__glow--1, .ghit-app-promo__glow--2 { animation: none; }
}
.ghit-app-promo__icon {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  flex-shrink: 0;
  border-radius: 12px;
  background: rgba(255,255,255,.22);
  color: #fff;
  box-shadow: 0 6px 16px -4px rgba(0,0,0,.3);
  animation: ghit-app-promo-wiggle 2s ease-in-out infinite;
}
@keyframes ghit-app-promo-wiggle {
  0%, 100% { transform: rotate(0deg); }
  10%      { transform: rotate(-8deg); }
  20%      { transform: rotate(8deg); }
  30%      { transform: rotate(-6deg); }
  40%      { transform: rotate(0deg); }
}
@media (prefers-reduced-motion: reduce) {
  .ghit-app-promo__icon { animation: none; }
}
.ghit-app-promo__icon-ring {
  position: absolute;
  inset: -4px;
  border-radius: 15px;
  border: 1.5px solid rgba(255,255,255,.8);
  animation: ghit-app-promo-ring 1.6s ease-out infinite;
}
@keyframes ghit-app-promo-ring {
  0%   { opacity: .9; transform: scale(1); }
  100% { opacity: 0; transform: scale(1.45); }
}
@media (prefers-reduced-motion: reduce) {
  .ghit-app-promo__icon-ring { animation: none; opacity: 0; }
}
.ghit-app-promo__body {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}
.ghit-app-promo__title {
  font-weight: 800;
  font-size: 14px;
  color: #fff;
  letter-spacing: -.01em;
  text-shadow: 0 1px 6px rgba(0,0,0,.25);
}
.ghit-app-promo__desc {
  font-size: 11.5px;
  line-height: 1.4;
  color: rgba(255,255,255,.85);
}
.ghit-app-promo__arrow {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 27px;
  height: 27px;
  flex-shrink: 0;
  margin-left: auto;
  border-radius: 99px;
  background: rgba(255,255,255,.22);
  color: #fff;
  animation: ghit-app-promo-arrow-bounce 1.4s ease-in-out infinite;
}
@keyframes ghit-app-promo-arrow-bounce {
  0%, 100% { transform: translateX(0); }
  50%      { transform: translateX(3px); }
}
@media (prefers-reduced-motion: reduce) {
  .ghit-app-promo__arrow { animation: none; }
}
.ghit-app-promo:focus-visible {
  outline: 2px solid var(--color-primary, #6366f1);
  outline-offset: 3px;
}

/* Biến thể cuối bài viết — full-width, nổi bật ấn tượng hơn cả bản sidebar:
   giữ nguyên viền xoay + shimmer + badge + glow + wiggle của bản gốc, thêm
   hiệu ứng "thở" (breathing) toàn card + dải lấp lánh ✨ bay ngang để tăng
   độ chú ý, phù hợp không gian rộng hơn cột sidebar hẹp. */
.ghit-app-promo--below-post {
  max-width: 640px;
  margin: 48px auto 0;
  box-shadow: 0 26px 54px -20px rgba(234,88,12,.55);
  animation: ghit-app-promo-breathe 3.2s ease-in-out infinite;
}
.ghit-app-promo--below-post:hover {
  animation-play-state: paused;
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 34px 64px -16px rgba(234,88,12,.75);
}
@keyframes ghit-app-promo-breathe {
  0%, 100% { box-shadow: 0 26px 54px -20px rgba(234,88,12,.55); }
  50%      { box-shadow: 0 30px 60px -16px rgba(253,224,71,.65); }
}
@media (prefers-reduced-motion: reduce) {
  .ghit-app-promo--below-post { animation: none; }
}
.ghit-app-promo--below-post .ghit-app-promo__inner {
  padding: 22px 26px;
  gap: 16px;
}
.ghit-app-promo--below-post .ghit-app-promo__title {
  font-size: 16.5px;
}
.ghit-app-promo--below-post .ghit-app-promo__desc {
  font-size: 13px;
}
.ghit-app-promo--below-post .ghit-app-promo__icon {
  width: 50px;
  height: 50px;
}
.ghit-app-promo--below-post .ghit-app-promo__arrow {
  width: 32px;
  height: 32px;
}
.ghit-app-promo--below-post .ghit-app-promo__badge {
  top: 4px;
  right: 20px;
}
/* Dải lấp lánh ✨ bay ngang — điểm nhấn riêng chỉ có ở bản cuối bài, không
   trùng lặp hoàn toàn với bản sidebar dù dùng chung khung hiệu ứng gốc. */
.ghit-app-promo--below-post .ghit-app-promo__inner::before {
  content: '✨';
  position: absolute;
  z-index: 2;
  top: 8px;
  left: -10%;
  font-size: 16px;
  opacity: 0;
  animation: ghit-app-promo-sparkle-fly 4s ease-in-out infinite;
  pointer-events: none;
}
@keyframes ghit-app-promo-sparkle-fly {
  0%   { left: -10%; top: 70%; opacity: 0; transform: scale(.6) rotate(0deg); }
  15%  { opacity: 1; transform: scale(1) rotate(20deg); }
  50%  { left: 50%; top: 10%; opacity: 1; transform: scale(1.2) rotate(180deg); }
  85%  { opacity: 1; }
  100% { left: 110%; top: 60%; opacity: 0; transform: scale(.6) rotate(340deg); }
}
@media (prefers-reduced-motion: reduce) {
  .ghit-app-promo--below-post .ghit-app-promo__inner::before { animation: none; opacity: 0; }
}