/*
Theme Name: TopAIHay
Theme URI: https://topaihay.com
Author: TopAIHay Team
Author URI: https://topaihay.com
Description: Theme chuyên biệt cho AI Tool Directory - thị trường Việt Nam. Thiết kế dark tech với accent vàng/cam neon, tối ưu SEO và tốc độ tải trang.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.7
Requires PHP: 8.0
License: GPL v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: topaihay
Tags: ai-directory, dark, technology, vietnamese, seo-optimized, custom-menu, featured-images, responsive-layout
*/

/* ============================================================
   CSS CUSTOM PROPERTIES
   ============================================================ */
:root {
  /* Brand Colors */
  --clr-bg:           #080C14;
  --clr-bg-2:         #0D1424;
  --clr-bg-card:      #111827;
  --clr-bg-card-hover:#16202E;
  --clr-border:       rgba(255,255,255,0.07);
  --clr-border-glow:  rgba(245,158,11,0.25);

  /* Accent — Amber/Gold */
  --clr-accent:       #F59E0B;
  --clr-accent-light: #FCD34D;
  --clr-accent-dim:   rgba(245,158,11,0.15);
  --clr-accent-glow:  0 0 24px rgba(245,158,11,0.35);

  /* Secondary — Cyan */
  --clr-cyan:         #22D3EE;
  --clr-cyan-dim:     rgba(34,211,238,0.12);

  /* Text */
  --clr-text:         #E2E8F0;
  --clr-text-muted:   #64748B;
  --clr-text-dim:     #94A3B8;
  --clr-white:        #FFFFFF;

  /* Category Colors */
  --cat-writing:      #F59E0B;
  --cat-design:       #EC4899;
  --cat-video:        #8B5CF6;
  --cat-code:         #22D3EE;
  --cat-business:     #10B981;
  --cat-education:    #3B82F6;

  /* Spacing */
  --space-xs:   0.25rem;
  --space-sm:   0.5rem;
  --space-md:   1rem;
  --space-lg:   1.5rem;
  --space-xl:   2rem;
  --space-2xl:  3rem;
  --space-3xl:  5rem;

  /* Typography */
  --font-display: 'Syne', 'Be Vietnam Pro', sans-serif;
  --font-body:    'Be Vietnam Pro', 'DM Sans', sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', monospace;

  /* Border Radius */
  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  18px;
  --radius-xl:  24px;
  --radius-full: 9999px;

  /* Transitions */
  --trans-fast:   0.15s ease;
  --trans-normal: 0.25s ease;
  --trans-slow:   0.4s cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-card:  0 4px 24px rgba(0,0,0,0.4);
  --shadow-glow:  0 0 0 1px rgba(245,158,11,0.3), 0 8px 32px rgba(245,158,11,0.15);
}

/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-body);
  background-color: var(--clr-bg);
  color: var(--clr-text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--clr-accent); text-decoration: none; transition: color var(--trans-fast); }
a:hover { color: var(--clr-accent-light); }
ul, ol { list-style: none; }

/* ============================================================
   TYPOGRAPHY
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  color: var(--clr-white);
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: clamp(1.125rem, 2vw, 1.5rem); }
h4 { font-size: 1.125rem; }

p { color: var(--clr-text-dim); margin-bottom: var(--space-md); }

.text-accent { color: var(--clr-accent); }
.text-cyan   { color: var(--clr-cyan); }
.text-muted  { color: var(--clr-text-muted); }

/* ============================================================
   LAYOUT CONTAINERS
   ============================================================ */
.container {
  width: 100%;
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: var(--space-xl);
}

.container--wide {
  max-width: 1440px;
  margin-inline: auto;
  padding-inline: var(--space-xl);
}

.section { padding-block: var(--space-3xl); }

/* Grid layouts */
.grid-tools {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.grid-tools--featured {
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
}

/* ============================================================
   NOISE TEXTURE OVERLAY
   ============================================================ */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
  opacity: 0.4;
}

/* ============================================================
   HEADER
   ============================================================ */
#site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(8,12,20,0.85);
  backdrop-filter: blur(20px) saturate(1.5);
  -webkit-backdrop-filter: blur(20px) saturate(1.5);
  border-bottom: 1px solid var(--clr-border);
  transition: all var(--trans-normal);
}

#site-header.scrolled {
  background: rgba(8,12,20,0.95);
  border-bottom-color: rgba(245,158,11,0.15);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  height: 68px;
}

/* Logo */
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-shrink: 0;
  text-decoration: none;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--clr-accent) 0%, #F97316 100%);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: var(--clr-accent-glow);
  position: relative;
  overflow: hidden;
}

.logo-icon::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 60%);
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--clr-white);
  letter-spacing: -0.03em;
}

.logo-text span { color: var(--clr-accent); }

/* Navigation */
#primary-nav {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

#primary-nav ul {
  display: flex;
  gap: var(--space-xs);
  align-items: center;
}

#primary-nav ul li a {
  display: block;
  padding: 0.4rem 0.875rem;
  color: var(--clr-text-dim);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-full);
  transition: all var(--trans-fast);
  text-decoration: none;
}

#primary-nav ul li a:hover,
#primary-nav ul li.current-menu-item > a {
  color: var(--clr-white);
  background: rgba(255,255,255,0.07);
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-shrink: 0;
}

.btn-search-toggle {
  width: 36px;
  height: 36px;
  background: transparent;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  color: var(--clr-text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--trans-fast);
  font-size: 0.875rem;
}

.btn-search-toggle:hover {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
}

.btn-submit-tool {
  background: linear-gradient(135deg, var(--clr-accent) 0%, #F97316 100%);
  color: #000 !important;
  font-weight: 700;
  font-size: 0.8125rem;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  transition: all var(--trans-fast);
  white-space: nowrap;
  box-shadow: 0 2px 12px rgba(245,158,11,0.3);
}

.btn-submit-tool:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(245,158,11,0.45);
  color: #000 !important;
}

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  width: 36px;
  height: 36px;
  cursor: pointer;
  color: var(--clr-text);
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero {
  position: relative;
  padding-block: var(--space-3xl) 4rem;
  overflow: hidden;
  text-align: center;
}

/* Animated grid background */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(245,158,11,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245,158,11,0.04) 1px, transparent 1px);
  background-size: 50px 50px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 40%, transparent 100%);
}

/* Glow orbs */
.hero::after {
  content: '';
  position: absolute;
  width: 600px;
  height: 600px;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(245,158,11,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  background: var(--clr-accent-dim);
  border: 1px solid rgba(245,158,11,0.3);
  color: var(--clr-accent);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.3rem 0.875rem;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-lg);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  animation: pulse-badge 3s ease-in-out infinite;
}

@keyframes pulse-badge {
  0%, 100% { box-shadow: 0 0 0 0 rgba(245,158,11,0.2); }
  50% { box-shadow: 0 0 0 6px rgba(245,158,11,0); }
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  background: var(--clr-accent);
  border-radius: 50%;
  animation: blink 1.5s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.hero-title {
  margin-bottom: var(--space-lg);
  position: relative;
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, var(--clr-accent) 0%, #F97316 40%, var(--clr-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--clr-text-muted);
  max-width: 600px;
  margin-inline: auto;
  margin-bottom: var(--space-2xl);
  line-height: 1.7;
}

/* Hero Stats */
.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--space-2xl);
  margin-top: var(--space-2xl);
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--clr-border);
}

.stat-item { text-align: center; }
.stat-number {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  color: var(--clr-accent);
  line-height: 1;
  margin-bottom: 0.25rem;
}
.stat-label {
  font-size: 0.8rem;
  color: var(--clr-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ============================================================
   SEARCH BAR
   ============================================================ */
.search-wrapper {
  position: relative;
  max-width: 640px;
  margin-inline: auto;
}

.search-form {
  display: flex;
  align-items: center;
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: 0.375rem 0.375rem 0.375rem 1.25rem;
  transition: all var(--trans-normal);
  gap: var(--space-sm);
}

.search-form:focus-within {
  border-color: var(--clr-accent);
  box-shadow: var(--shadow-glow);
}

.search-icon {
  color: var(--clr-text-muted);
  font-size: 0.95rem;
  flex-shrink: 0;
}

.search-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--clr-white);
  font-family: var(--font-body);
  font-size: 1rem;
  placeholder-color: var(--clr-text-muted);
}

.search-input::placeholder { color: var(--clr-text-muted); }

.search-submit {
  background: linear-gradient(135deg, var(--clr-accent), #F97316);
  border: none;
  color: #000;
  font-weight: 700;
  font-size: 0.875rem;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--trans-fast);
  white-space: nowrap;
  flex-shrink: 0;
}

.search-submit:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(245,158,11,0.4);
}

/* ============================================================
   CATEGORY PILLS
   ============================================================ */
.category-pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
  margin-block: var(--space-xl);
}

.cat-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.4rem 1rem;
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-full);
  color: var(--clr-text-dim);
  font-size: 0.8125rem;
  font-weight: 500;
  text-decoration: none;
  transition: all var(--trans-normal);
  cursor: pointer;
}

.cat-pill:hover,
.cat-pill.active {
  border-color: var(--cat-color, var(--clr-accent));
  color: var(--cat-color, var(--clr-accent));
  background: rgba(var(--cat-rgb, 245,158,11), 0.1);
  transform: translateY(-2px);
}

.cat-pill .cat-icon { font-size: 0.875rem; }
.cat-pill .cat-count {
  background: rgba(255,255,255,0.07);
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  color: var(--clr-text-muted);
}

/* ============================================================
   TOOL CARDS
   ============================================================ */
.tool-card {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  transition: all var(--trans-slow);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  cursor: pointer;
}

.tool-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--card-accent, rgba(245,158,11,0.05)) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--trans-normal);
  pointer-events: none;
  z-index: 1;
}

.tool-card:hover {
  border-color: var(--card-accent-border, rgba(245,158,11,0.25));
  background: var(--clr-bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.4), 0 0 0 1px var(--card-accent-border, rgba(245,158,11,0.15));
}

.tool-card:hover::before { opacity: 1; }

/* ---- Thumbnail 16:9 ---- */
.card-thumb {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--clr-bg-2);
  flex-shrink: 0;
}

.card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.tool-card:hover .card-thumb img {
  transform: scale(1.04);
}

/* Placeholder khi không có ảnh */
.card-thumb--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--clr-bg-2) 0%, #1a2535 100%);
}

.card-thumb--placeholder span {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 800;
  color: rgba(245,158,11,0.25);
  line-height: 1;
  user-select: none;
}

/* Overlay gradient phía dưới thumb để chữ dễ đọc */
.card-thumb::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 40%;
  background: linear-gradient(to top, rgba(8,12,20,0.6) 0%, transparent 100%);
  pointer-events: none;
}

/* ---- Card Body (phần dưới thumbnail) ---- */
.card-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding: var(--space-md);
  flex: 1;
}

/* Card Header — logo nhỏ + tên */
.card-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* Logo icon nhỏ 32×32 (1:1) hiển thị cạnh tên */
.tool-logo-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  flex-shrink: 0;
  border: 1px solid var(--clr-border);
  background: var(--clr-bg-2);
}

.tool-logo-icon--placeholder {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--clr-accent-dim), var(--clr-bg-2));
  border: 1px solid var(--clr-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 800;
  color: var(--clr-accent);
  flex-shrink: 0;
}

.tool-meta { flex: 1; min-width: 0; }

.tool-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--clr-white);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.3;
}

.tool-tagline {
  font-size: 0.75rem;
  color: var(--clr-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 1px;
}

/* Badges */
.badge-row {
  display: flex;
  gap: 0.375rem;
  flex-wrap: wrap;
}

.badge {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-full);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.badge--free    { background: rgba(16,185,129,0.15); color: #34D399; border: 1px solid rgba(16,185,129,0.2); }
.badge--paid    { background: rgba(245,158,11,0.12); color: #FCD34D; border: 1px solid rgba(245,158,11,0.2); }
.badge--freemium { background: rgba(34,211,238,0.1); color: var(--clr-cyan); border: 1px solid rgba(34,211,238,0.2); }
.badge--new     { background: rgba(139,92,246,0.15); color: #A78BFA; border: 1px solid rgba(139,92,246,0.2); }
.badge--hot     { background: rgba(249,115,22,0.15); color: #FB923C; border: 1px solid rgba(249,115,22,0.2); }
.badge--vn      { background: rgba(220,38,38,0.12); color: #F87171; border: 1px solid rgba(220,38,38,0.2); }

/* Tool Description */
.tool-desc {
  font-size: 0.8125rem;
  color: var(--clr-text-dim);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 0;
}

/* Card Footer */
.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-sm);
  border-top: 1px solid var(--clr-border);
  margin-top: auto;
}

.rating {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.stars { color: var(--clr-accent); font-size: 0.75rem; letter-spacing: -1px; }
.rating-num { font-size: 0.8125rem; font-weight: 600; color: var(--clr-white); }
.rating-count { font-size: 0.75rem; color: var(--clr-text-muted); }

.cat-tag {
  font-size: 0.75rem;
  color: var(--clr-text-muted);
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

/* Featured card variant */
.tool-card--featured {
  border-color: rgba(245,158,11,0.2);
}

.tool-card--featured .card-thumb::before {
  content: '⭐ Nổi bật';
  position: absolute;
  top: 10px;
  right: 10px;
  background: rgba(8,12,20,0.8);
  border: 1px solid rgba(245,158,11,0.4);
  color: var(--clr-accent);
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  z-index: 2;
  backdrop-filter: blur(8px);
}

/* ============================================================
   SECTION HEADINGS
   ============================================================ */
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: var(--space-xl);
  gap: var(--space-md);
}

.section-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-accent);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.section-label::before {
  content: '';
  width: 20px;
  height: 2px;
  background: var(--clr-accent);
  display: inline-block;
}

.section-title { margin-bottom: 0; }

.view-all-link {
  color: var(--clr-text-muted);
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 0.375rem;
  white-space: nowrap;
  transition: color var(--trans-fast);
}

.view-all-link:hover { color: var(--clr-accent); }

/* ============================================================
   CATEGORIES GRID
   ============================================================ */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-md);
}

.category-card {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  text-decoration: none;
  transition: all var(--trans-slow);
  display: flex;
  align-items: center;
  gap: var(--space-md);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--cat-color);
  opacity: 0;
  transition: opacity var(--trans-normal);
}

.category-card:hover {
  border-color: rgba(var(--cat-rgb), 0.25);
  transform: translateY(-3px);
  background: var(--clr-bg-card-hover);
}

.category-card:hover::before { opacity: 1; }

.cat-icon-wrap {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: rgba(var(--cat-rgb), 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.cat-info { min-width: 0; }
.cat-name {
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--clr-white);
  margin-bottom: 0.2rem;
}
.cat-count-text {
  font-size: 0.775rem;
  color: var(--clr-text-muted);
}

/* ============================================================
   NEWSLETTER / CTA SECTION
   ============================================================ */
.cta-section {
  background: linear-gradient(135deg, rgba(245,158,11,0.08) 0%, rgba(249,115,22,0.05) 50%, rgba(34,211,238,0.05) 100%);
  border: 1px solid rgba(245,158,11,0.15);
  border-radius: var(--radius-xl);
  padding: var(--space-3xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(245,158,11,0.06) 0%, transparent 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.newsletter-form {
  display: flex;
  gap: var(--space-sm);
  max-width: 480px;
  margin-inline: auto;
  margin-top: var(--space-xl);
}

.newsletter-input {
  flex: 1;
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: 0.75rem 1rem;
  color: var(--clr-white);
  font-family: var(--font-body);
  font-size: 0.9rem;
  outline: none;
  transition: border-color var(--trans-fast);
}

.newsletter-input:focus { border-color: var(--clr-accent); }
.newsletter-input::placeholder { color: var(--clr-text-muted); }

.newsletter-btn {
  background: linear-gradient(135deg, var(--clr-accent), #F97316);
  border: none;
  color: #000;
  font-weight: 700;
  font-size: 0.875rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--trans-fast);
  white-space: nowrap;
}

.newsletter-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(245,158,11,0.4);
}

/* ============================================================
   SIDEBAR
   ============================================================ */
.content-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--space-2xl);
  align-items: start;
}

.sidebar {
  position: sticky;
  top: 88px;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.sidebar-widget {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

.widget-title {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--clr-text-muted);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--clr-border);
}

/* ============================================================
   TOOL SINGLE PAGE
   ============================================================ */

/* Banner 16:9 full-width ở đầu trang single */
.tool-banner-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  max-height: 480px;
  overflow: hidden;
  background: var(--clr-bg-2);
}

.tool-banner-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.tool-banner-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(8,12,20,0.1) 0%,
    rgba(8,12,20,0.5) 70%,
    rgba(8,12,20,0.88) 100%
  );
}

.tool-hero {
  background: linear-gradient(180deg, rgba(245,158,11,0.04) 0%, transparent 100%);
  border-bottom: 1px solid var(--clr-border);
  padding-block: var(--space-2xl);
}

.tool-hero-inner {
  display: flex;
  gap: var(--space-xl);
  align-items: flex-start;
}

.tool-logo-large {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--clr-border);
  flex-shrink: 0;
  object-fit: cover;
}

.tool-info-main { flex: 1; }
.tool-title-large {
  font-size: clamp(1.375rem, 5vw, 2.25rem); /* co từ 22px → 36px tùy viewport */
  margin-bottom: 0.5rem;
  word-break: break-word; /* phòng tên tool dài không có khoảng trắng */
}

.tool-actions {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
  flex-wrap: wrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--clr-accent), #F97316);
  color: #000;
  font-weight: 700;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.9rem;
  transition: all var(--trans-fast);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  white-space: nowrap; /* tránh text bị xuống dòng giữa nút */
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(245,158,11,0.4);
  color: #000;
}

.btn-secondary {
  background: transparent;
  color: var(--clr-text-dim);
  font-weight: 600;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--clr-border);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.9rem;
  transition: all var(--trans-fast);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  white-space: nowrap;
}

.btn-secondary:hover {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
}

/* Specs table */
.tool-specs {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.tool-specs tr {
  border-bottom: 1px solid var(--clr-border);
}

.tool-specs tr:last-child { border-bottom: none; }

.tool-specs th {
  padding: 0.65rem 0.75rem;
  text-align: left;
  font-weight: 600;
  color: var(--clr-text-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  width: 42%; /* rộng hơn để nhãn tiếng Việt không bị cắt */
  white-space: nowrap;
}

.tool-specs td {
  padding: 0.65rem 0.75rem;
  color: var(--clr-text);
  word-break: break-word; /* URL hoặc giá dài không tràn */
}

/* ============================================================
   PAGINATION
   ============================================================ */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding-top: var(--space-2xl);
}

.page-link {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  color: var(--clr-text-dim);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: all var(--trans-fast);
}

.page-link:hover,
.page-link.active {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
  background: var(--clr-accent-dim);
}

/* ============================================================
   FOOTER
   ============================================================ */
#site-footer {
  background: var(--clr-bg-2);
  border-top: 1px solid var(--clr-border);
  padding-top: var(--space-3xl);
  margin-top: var(--space-3xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  padding-bottom: var(--space-2xl);
}

.footer-brand .footer-desc {
  font-size: 0.875rem;
  color: var(--clr-text-muted);
  line-height: 1.7;
  margin-top: var(--space-md);
  margin-bottom: var(--space-lg);
}

.footer-social {
  display: flex;
  gap: var(--space-sm);
}

.social-link {
  width: 36px;
  height: 36px;
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-text-muted);
  font-size: 0.875rem;
  text-decoration: none;
  transition: all var(--trans-fast);
}

.social-link:hover {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
}

.footer-col-title {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--clr-white);
  margin-bottom: var(--space-md);
}

.footer-links { display: flex; flex-direction: column; gap: 0.625rem; }
.footer-links a {
  color: var(--clr-text-muted);
  font-size: 0.875rem;
  text-decoration: none;
  transition: color var(--trans-fast);
}
.footer-links a:hover { color: var(--clr-accent); }

.footer-bottom {
  border-top: 1px solid var(--clr-border);
  padding-block: var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.footer-copy {
  font-size: 0.8125rem;
  color: var(--clr-text-muted);
}

.footer-bottom-links {
  display: flex;
  gap: var(--space-lg);
}

.footer-bottom-links a {
  font-size: 0.8125rem;
  color: var(--clr-text-muted);
  text-decoration: none;
  transition: color var(--trans-fast);
}
.footer-bottom-links a:hover { color: var(--clr-accent); }

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.animate-in {
  animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }

/* Skeleton loading */
.skeleton {
  background: linear-gradient(90deg, var(--clr-bg-card) 25%, rgba(255,255,255,0.04) 50%, var(--clr-bg-card) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ============================================================
   SCROLLBAR
   ============================================================ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--clr-bg); }
::-webkit-scrollbar-thumb {
  background: rgba(245,158,11,0.3);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(245,158,11,0.6);
}

/* ============================================================
   SELECTION
   ============================================================ */
::selection {
  background: rgba(245,158,11,0.25);
  color: var(--clr-white);
}

/* ============================================================
   UTILITIES
   ============================================================ */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.hidden { display: none !important; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.mt-auto { margin-top: auto; }
.text-center { text-align: center; }
.w-full { width: 100%; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .content-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; }
}

@media (max-width: 768px) {
  :root {
    --space-3xl: 3rem;
    --space-2xl: 2rem;
  }

  .container { padding-inline: var(--space-md); }
  #primary-nav { display: none; }
  #primary-nav.open { display: flex; position: absolute; top: 68px; left: 0; right: 0; background: var(--clr-bg-2); border-bottom: 1px solid var(--clr-border); padding: var(--space-md); }
  #primary-nav.open ul { flex-direction: column; width: 100%; }
  .menu-toggle { display: flex; }
  .hero-stats { gap: var(--space-lg); }
  .stat-number { font-size: 1.5rem; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .grid-tools { grid-template-columns: 1fr; }
  .categories-grid { grid-template-columns: repeat(2, 1fr); }
  .newsletter-form { flex-direction: column; }
  .tool-hero-inner { flex-direction: column; }

  /* Bước 4 — Quick Specs box: bỏ min-width cứng khi collapse thành cột */
  .tool-hero-inner > div[style*="min-width"] { min-width: 0 !important; width: 100% !important; }

  /* Bước 4 — Actions: nút full-width trên mobile nhỏ */
  .tool-actions { flex-direction: column; }
  .tool-actions .btn-primary,
  .tool-actions .btn-secondary { width: 100%; justify-content: center; }

  /* 16:9 banner trang single — giới hạn chiều cao trên mobile */
  .tool-banner-wrap { max-height: 220px; }

  /* Card thumbnail trên mobile vẫn giữ 16:9 */
  .card-thumb { aspect-ratio: 16 / 9; }
}

@media (max-width: 480px) {
  .hero-stats { flex-direction: column; gap: var(--space-md); }
  .categories-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   SEARCH OVERLAY
   ============================================================ */
.search-overlay {
  position: fixed;
  inset: 0;
  background: rgba(8,12,20,0.96);
  backdrop-filter: blur(24px);
  z-index: 200;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 15vh;
  animation: fadeIn 0.2s ease;
}

.search-overlay[hidden] { display: none; }

.search-overlay-inner {
  width: 100%;
  max-width: 600px;
  padding-inline: var(--space-lg);
}

.search-overlay-close-wrap {
  display: flex;
  justify-content: flex-end;
  margin-bottom: var(--space-lg);
}

.search-overlay-close-wrap button {
  background: transparent;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-text-muted);
  cursor: pointer;
  transition: all var(--trans-fast);
}

.search-overlay-close-wrap button:hover {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
}

.search-overlay .search-form {
  border-color: rgba(245,158,11,0.3);
  box-shadow: var(--shadow-glow);
}

.search-hint {
  font-size: .8125rem;
  color: var(--clr-text-muted);
  text-align: center;
  margin-top: 1rem;
  margin-bottom: 0;
}

/* ============================================================
   PROSE (tool content)
   ============================================================ */
.prose h2 { font-size: 1.5rem; color: var(--clr-white); margin: 2rem 0 1rem; padding-bottom: .5rem; border-bottom: 1px solid var(--clr-border); }
.prose h3 { font-size: 1.2rem; color: var(--clr-white); margin: 1.5rem 0 .75rem; }
.prose p  { color: var(--clr-text-dim); margin-bottom: 1rem; }
.prose ul, .prose ol { color: var(--clr-text-dim); padding-left: 1.5rem; margin-bottom: 1rem; }
.prose li { list-style: disc; margin-bottom: .375rem; }
.prose ol li { list-style: decimal; }
.prose a { color: var(--clr-accent); }
.prose a:hover { color: var(--clr-accent-light); text-decoration: underline; }
.prose strong { color: var(--clr-white); font-weight: 600; }
.prose code { background: var(--clr-bg-2); border: 1px solid var(--clr-border); border-radius: 4px; padding: .15rem .4rem; font-family: var(--font-mono); font-size: .85em; color: var(--clr-cyan); }
.prose pre { background: var(--clr-bg-2); border: 1px solid var(--clr-border); border-radius: var(--radius-md); padding: 1rem; overflow-x: auto; margin-bottom: 1rem; }
.prose blockquote { border-left: 3px solid var(--clr-accent); padding-left: 1rem; color: var(--clr-text-muted); font-style: italic; margin: 1.5rem 0; }
.prose img { border-radius: var(--radius-md); border: 1px solid var(--clr-border); }
.prose table { width: 100%; border-collapse: collapse; margin-bottom: 1.5rem; }
.prose th, .prose td { padding: .75rem 1rem; border: 1px solid var(--clr-border); text-align: left; font-size: .875rem; }
.prose th { background: var(--clr-bg-2); font-weight: 600; color: var(--clr-white); }

/* Related tool hover */
.related-tool-link:hover > div > div:first-child { color: var(--clr-accent) !important; }

/* ============================================================
   POST CARD — bài viết post_type=post
   ============================================================ */
.post-card {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--trans-slow);
  position: relative;
}

.post-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--cat-color, var(--clr-accent));
  opacity: 0;
  transition: opacity var(--trans-normal);
}

.post-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255,255,255,0.12);
  box-shadow: 0 12px 40px rgba(0,0,0,0.4);
}

.post-card:hover::before { opacity: 1; }

/* Thumbnail 16:9 */
.post-card__thumb-link { display: block; overflow: hidden; }

.post-card__thumb {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--clr-bg-2);
  display: block;
  width: 100%;
}

.post-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.post-card:hover .post-card__thumb img { transform: scale(1.04); }

.post-card__thumb--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--clr-bg-2), #1a2535);
  font-size: 2.5rem;
}

/* Body */
.post-card__body {
  padding: var(--space-md) var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1;
}

.post-card__cat {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--cat-color, var(--clr-accent));
  text-decoration: none;
  transition: opacity var(--trans-fast);
}
.post-card__cat:hover { opacity: 0.75; }

.post-card__title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.35;
  margin: 0;
}
.post-card__title a { color: var(--clr-white); text-decoration: none; }
.post-card__title a:hover { color: var(--cat-color, var(--clr-accent)); }
.post-card__title--lg { font-size: 1.375rem; }

.post-card__excerpt {
  font-size: 0.8375rem;
  color: var(--clr-text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0;
}

.post-card__meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding-top: 0.625rem;
  border-top: 1px solid var(--clr-border);
  margin-top: auto;
  flex-wrap: wrap;
}

.post-card__author {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.775rem;
  color: var(--clr-text-muted);
}

.post-card__avatar {
  width: 20px !important;
  height: 20px !important;
  border-radius: 50%;
}

.post-card__date,
.post-card__read {
  font-size: 0.775rem;
  color: var(--clr-text-muted);
}

.post-card__sep { color: var(--clr-border); font-size: 0.9rem; }

/* Featured variant */
.post-card--featured {
  border-color: rgba(245,158,11,0.15);
}

.post-card--featured .post-card__thumb {
  aspect-ratio: 16 / 7;
}

/* ============================================================
   POSTS GRID
   ============================================================ */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
}

/* ============================================================
   POST LAYOUT (content + sidebar)
   ============================================================ */
.post-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--space-2xl);
  align-items: start;
}

.post-content-wrap { min-width: 0; }
.post-sidebar { position: sticky; top: 88px; }

/* ============================================================
   SINGLE POST — BANNER
   ============================================================ */
.post-banner {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  max-height: 520px;
  overflow: hidden;
  background: var(--clr-bg-2);
}

.post-banner__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.post-banner__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(8,12,20,0.05) 0%,
    rgba(8,12,20,0.55) 65%,
    rgba(8,12,20,0.92) 100%
  );
}

.post-banner__cat {
  position: absolute;
  top: 1.25rem;
  left: 1.25rem;
  z-index: 2;
  background: rgba(8,12,20,0.75);
  backdrop-filter: blur(8px);
  border: 1px solid var(--cat-color, var(--clr-accent));
  color: var(--cat-color, var(--clr-accent));
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  text-decoration: none;
}

/* ============================================================
   SINGLE POST — HEADER
   ============================================================ */
.post-header {
  border-bottom: 1px solid var(--clr-border);
  padding-block: var(--space-xl) var(--space-2xl);
}

.post-header__inner { max-width: 800px; }

.post-cats {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: var(--space-md);
}

.post-cat-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  background: rgba(var(--cat-rgb, 245,158,11), 0.12);
  border: 1px solid var(--cat-color, var(--clr-accent));
  color: var(--cat-color, var(--clr-accent));
  text-decoration: none;
  transition: all var(--trans-fast);
}
.post-cat-badge:hover { opacity: 0.8; }

.post-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  line-height: 1.2;
  margin-bottom: var(--space-md);
}

.post-excerpt {
  font-size: 1.125rem;
  color: var(--clr-text-dim);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}

.post-meta-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.post-author {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--clr-text-dim);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
}
.post-author:hover { color: var(--clr-accent); }
.post-author__avatar {
  width: 36px !important;
  height: 36px !important;
  border-radius: 50%;
  border: 2px solid var(--clr-border);
}

.post-date, .post-readtime {
  font-size: 0.875rem;
  color: var(--clr-text-muted);
}
.post-meta-sep { color: var(--clr-border); }

/* ============================================================
   TABLE OF CONTENTS
   ============================================================ */
.toc-box {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-left: 3px solid var(--clr-accent);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.toc-box__title {
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--clr-white);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: var(--space-md);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

#toc-nav ol { list-style: none; padding: 0; margin: 0; }
#toc-nav li { margin-bottom: 0.375rem; }
#toc-nav a {
  font-size: 0.875rem;
  color: var(--clr-text-muted);
  text-decoration: none;
  transition: color var(--trans-fast);
  display: block;
  padding: 0.2rem 0;
  border-left: 2px solid transparent;
  padding-left: 0.75rem;
}
#toc-nav a:hover,
#toc-nav a.active {
  color: var(--clr-accent);
  border-left-color: var(--clr-accent);
}
#toc-nav .toc-h3 { padding-left: 1.75rem; font-size: 0.8125rem; }

/* ============================================================
   POST TAGS & SHARE
   ============================================================ */
.post-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  padding: var(--space-lg);
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  margin-top: var(--space-2xl);
}

.post-tags__label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--clr-text-muted);
  margin-right: 0.25rem;
}

.post-tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--clr-bg-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-full);
  color: var(--clr-text-dim);
  font-size: 0.8rem;
  text-decoration: none;
  transition: all var(--trans-fast);
}
.post-tag:hover {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
}

/* Share */
.post-share {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  flex-wrap: wrap;
  margin-top: var(--space-lg);
}

.post-share__label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--clr-text-muted);
  margin-right: 0.25rem;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  font-family: var(--font-body);
  cursor: pointer;
  text-decoration: none;
  border: 1px solid var(--clr-border);
  transition: all var(--trans-fast);
  background: transparent;
  color: var(--clr-text-dim);
}

.share-btn:hover { transform: translateY(-1px); }
.share-btn--fb:hover  { border-color: #1877F2; color: #1877F2; background: rgba(24,119,242,0.08); }
.share-btn--tw:hover  { border-color: var(--clr-white); color: var(--clr-white); background: rgba(255,255,255,0.06); }
.share-btn--copy:hover { border-color: var(--clr-accent); color: var(--clr-accent); background: var(--clr-accent-dim); }

/* ============================================================
   AUTHOR BOX
   ============================================================ */
.author-box {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin-top: var(--space-2xl);
}

.author-box__avatar {
  width: 72px !important;
  height: 72px !important;
  border-radius: 50%;
  border: 2px solid var(--clr-border);
  flex-shrink: 0;
}

.author-box__name {
  font-weight: 700;
  font-size: 1rem;
  color: var(--clr-white);
  margin-bottom: 0.5rem;
}
.author-box__name a { color: inherit; text-decoration: none; }
.author-box__name a:hover { color: var(--clr-accent); }

.author-box__bio {
  font-size: 0.875rem;
  color: var(--clr-text-muted);
  line-height: 1.65;
  margin-bottom: 0.75rem;
}

.author-box__link {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--clr-accent);
}

/* ============================================================
   POST NAVIGATION
   ============================================================ */
.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-top: var(--space-2xl);
}

.post-nav__item {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md) var(--space-lg);
  text-decoration: none;
  transition: all var(--trans-normal);
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.post-nav__item:hover {
  border-color: var(--clr-accent);
  background: var(--clr-bg-card-hover);
}

.post-nav__item--next { text-align: right; }

.post-nav__dir {
  font-size: 0.75rem;
  color: var(--clr-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.post-nav__ttl {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--clr-white);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ============================================================
   RELATED POSTS
   ============================================================ */
.related-posts { margin-top: var(--space-2xl); }
.related-posts__title {
  font-size: 1.125rem;
  margin-bottom: var(--space-lg);
  color: var(--clr-white);
}

.related-posts__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

/* ============================================================
   CATEGORY PAGE HEADER
   ============================================================ */
.cat-page-header {
  position: relative;
  padding-block: 3rem 2.5rem;
  border-bottom: 1px solid var(--clr-border);
  overflow: hidden;
}

.cat-page-header__bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
    rgba(var(--cat-rgb, 245,158,11), 0.06) 0%,
    transparent 60%
  );
  border-bottom: 1px solid rgba(var(--cat-rgb, 245,158,11), 0.1);
}

/* CSS var workaround for rgb — set inline on element */
.cat-page-header { --cat-rgb: 245,158,11; }

.cat-page-header__inner { position: relative; }

.cat-page-header__content {
  display: flex;
  align-items: flex-start;
  gap: var(--space-lg);
  margin-top: var(--space-md);
  margin-bottom: var(--space-lg);
}

.cat-page-header__icon {
  font-size: 3rem;
  line-height: 1;
  flex-shrink: 0;
  margin-top: 0.25rem;
}

.cat-page-header__title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: 0.5rem;
}

.cat-page-header__desc {
  color: var(--clr-text-muted);
  font-size: 1rem;
  max-width: 600px;
  margin-bottom: 0.5rem;
}

.cat-page-header__meta {
  font-size: 0.8125rem;
  color: var(--clr-text-muted);
}

/* Sub-category nav pills */
.cat-sub-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.cat-sub-nav__pill {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.4rem 1rem;
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-full);
  color: var(--clr-text-dim);
  font-size: 0.8125rem;
  font-weight: 500;
  text-decoration: none;
  transition: all var(--trans-normal);
}

.cat-sub-nav__pill:hover,
.cat-sub-nav__pill.active {
  border-color: var(--cat-color, var(--clr-accent));
  color: var(--cat-color, var(--clr-accent));
  background: rgba(var(--cat-rgb, 245,158,11), 0.08);
}

.cat-sub-nav__count {
  background: rgba(255,255,255,0.07);
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  color: var(--clr-text-muted);
}

/* ============================================================
   ARCHIVE HEADER
   ============================================================ */
.arc-header {
  padding-block: 2.5rem 2rem;
  border-bottom: 1px solid var(--clr-border);
  background: linear-gradient(180deg, rgba(245,158,11,0.04) 0%, transparent 100%);
}

.arc-header__inner { }
.arc-header__content {
  display: flex;
  align-items: flex-start;
  gap: var(--space-lg);
  margin-top: var(--space-md);
}

.arc-header__icon {
  font-size: 2.5rem;
  line-height: 1;
  flex-shrink: 0;
}

.arc-header__title {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  margin-bottom: 0.5rem;
}

.arc-header__desc {
  color: var(--clr-text-muted);
  font-size: 0.9375rem;
  max-width: 600px;
  margin-bottom: 0;
}

.arc-header__count {
  font-size: 0.8125rem;
  color: var(--clr-text-muted);
  display: block;
  margin-top: 0.5rem;
}

.arc-author-box {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-top: var(--space-lg);
  padding: var(--space-md);
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  max-width: 500px;
}

.arc-author-box__avatar {
  width: 80px !important;
  height: 80px !important;
  border-radius: 50%;
  border: 2px solid var(--clr-border);
  flex-shrink: 0;
}

.arc-author-box strong { color: var(--clr-white); display: block; margin-bottom: 0.375rem; }
.arc-author-box p { font-size: 0.875rem; color: var(--clr-text-muted); margin: 0; }

/* ============================================================
   BLOG HEADER
   ============================================================ */
.blog-header {
  padding-block: 3rem 2rem;
  border-bottom: 1px solid var(--clr-border);
  background: linear-gradient(180deg, rgba(245,158,11,0.04) 0%, transparent 100%);
}

.blog-header__inner { }
.blog-header__title {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: var(--space-sm);
}

.blog-header__desc {
  color: var(--clr-text-muted);
  font-size: 1.0625rem;
  max-width: 560px;
  margin-bottom: var(--space-xl);
}

.blog-cat-pills { justify-content: flex-start; margin-top: 0; }

/* ============================================================
   SIDEBAR — bài viết
   ============================================================ */
.sidebar-cat-list {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.sidebar-cat-item {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.5rem 0.625rem;
  border-radius: var(--radius-md);
  color: var(--clr-text-dim);
  font-size: 0.875rem;
  text-decoration: none;
  transition: all var(--trans-fast);
}

.sidebar-cat-item:hover {
  background: rgba(255,255,255,0.04);
  color: var(--cat-color, var(--clr-accent));
}

.sidebar-cat-item__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cat-color, var(--clr-accent));
  flex-shrink: 0;
}

.sidebar-cat-item__count {
  margin-left: auto;
  font-size: 0.75rem;
  color: var(--clr-text-muted);
  background: rgba(255,255,255,0.05);
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-full);
}

/* Sidebar posts (numbered) */
.sidebar-posts { display: flex; flex-direction: column; gap: 0.25rem; }

.sidebar-post-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.625rem 0;
  border-bottom: 1px solid var(--clr-border);
  text-decoration: none;
  transition: all var(--trans-fast);
}

.sidebar-post-item:last-child { border-bottom: none; }
.sidebar-post-item:hover .sidebar-post-item__title { color: var(--clr-accent); }

.sidebar-post-item__num {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 800;
  color: rgba(245,158,11,0.2);
  line-height: 1;
  flex-shrink: 0;
  width: 24px;
  text-align: center;
  margin-top: 2px;
}

.sidebar-post-item__body { min-width: 0; }
.sidebar-post-item__cat {
  display: block;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.25rem;
}

.sidebar-post-item__title {
  display: block;
  font-size: 0.8375rem;
  font-weight: 600;
  color: var(--clr-white);
  line-height: 1.4;
  margin-bottom: 0.25rem;
  transition: color var(--trans-fast);
}

.sidebar-post-item__date {
  font-size: 0.7375rem;
  color: var(--clr-text-muted);
}

/* Sidebar tools (16:9 thumb) */
.sidebar-tools { display: flex; flex-direction: column; gap: 0.625rem; }

.sidebar-tool-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  transition: all var(--trans-fast);
  padding: 0.375rem;
  border-radius: var(--radius-md);
  margin: -0.375rem;
}

.sidebar-tool-item:hover { background: rgba(255,255,255,0.04); }
.sidebar-tool-item:hover .sidebar-tool-item__name { color: var(--clr-accent); }

.sidebar-tool-item__thumb {
  width: 80px;
  height: 45px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
  background: var(--clr-bg-2);
  border: 1px solid var(--clr-border);
}

.sidebar-tool-item__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.sidebar-tool-item__thumb--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: rgba(245,158,11,0.3);
  font-weight: 800;
  font-family: var(--font-display);
}

.sidebar-tool-item__info { min-width: 0; }
.sidebar-tool-item__name {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--clr-white);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color var(--trans-fast);
}

.sidebar-tool-item__price {
  display: block;
  font-size: 0.7375rem;
  color: var(--clr-text-muted);
  margin-top: 2px;
}

.sidebar-widget__more {
  display: block;
  font-size: 0.8125rem;
  color: var(--clr-accent);
  margin-top: var(--space-sm);
  text-align: right;
}

/* Tag cloud */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
}

.tag-cloud__item {
  display: inline-block;
  padding: 0.25rem 0.625rem;
  background: var(--clr-bg-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-full);
  color: var(--clr-text-muted);
  font-size: 0.775rem;
  text-decoration: none;
  transition: all var(--trans-fast);
}

.tag-cloud__item:hover {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
  background: var(--clr-accent-dim);
}

/* ============================================================
   BREADCRUMB
   ============================================================ */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--clr-text-muted);
  flex-wrap: wrap;
  margin-bottom: var(--space-lg);
}

.breadcrumb a {
  color: var(--clr-text-muted);
  text-decoration: none;
  transition: color var(--trans-fast);
}
.breadcrumb a:hover { color: var(--clr-accent); }
.breadcrumb span:last-child { color: var(--clr-white); }

/* ============================================================
   EMPTY STATE
   ============================================================ */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--clr-text-muted);
}

.empty-state__icon {
  font-size: 4rem;
  margin-bottom: 1rem;
  display: block;
}

.empty-state h2 { margin-bottom: 0.75rem; }
.empty-state p { max-width: 400px; margin-inline: auto; margin-bottom: 1.5rem; }

/* ============================================================
   COMMENTS
   ============================================================ */
.comments-section { margin-top: var(--space-2xl); }

.comments-section .comment-list { list-style: none; padding: 0; }

.comments-section .comment {
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--clr-border);
}

.comments-section .comment-author .avatar {
  width: 44px !important;
  height: 44px !important;
  border-radius: 50%;
  border: 2px solid var(--clr-border);
}

.comments-section .comment-content p {
  color: var(--clr-text-dim);
  font-size: 0.9375rem;
}

.comments-section #respond {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin-top: var(--space-xl);
}

.comments-section #respond input[type="text"],
.comments-section #respond input[type="email"],
.comments-section #respond textarea {
  background: var(--clr-bg-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  color: var(--clr-white);
  font-family: var(--font-body);
  padding: 0.75rem 1rem;
  width: 100%;
  outline: none;
  transition: border-color var(--trans-fast);
}

.comments-section #respond input:focus,
.comments-section #respond textarea:focus {
  border-color: var(--clr-accent);
}

.comments-section #respond #submit {
  background: linear-gradient(135deg, var(--clr-accent), #F97316);
  border: none;
  color: #000;
  font-weight: 700;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.9rem;
  transition: all var(--trans-fast);
}

.comments-section #respond #submit:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(245,158,11,0.4);
}

/* ============================================================
   RESPONSIVE — bài viết & category
   ============================================================ */
@media (max-width: 1024px) {
  .post-layout { grid-template-columns: 1fr; }
  .post-sidebar { position: static; }
  .related-posts__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .post-banner { max-height: 240px; }
  .post-nav { grid-template-columns: 1fr; }
  .post-nav__item--next { text-align: left; }
  .related-posts__grid { grid-template-columns: 1fr; }
  .posts-grid { grid-template-columns: 1fr; }
  .author-box { flex-direction: column; }
  .arc-author-box { flex-direction: column; }
  .cat-page-header__content { flex-direction: column; gap: var(--space-sm); }
  .cat-page-header__icon { font-size: 2rem; }
}

/* ============================================================
   POST CARD — CATEGORY BADGE OVERLAY (trên thumbnail)
   ============================================================ */
.post-card__thumb {
  position: relative;
}

.post-card__cat-badge {
  position: absolute;
  bottom: 10px;
  left: 10px;
  background: rgba(8,12,20,0.80);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--clr-accent);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.22rem 0.55rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(245,158,11,0.3);
  line-height: 1.4;
  pointer-events: none;
  z-index: 2;
  white-space: nowrap;
}

/* ============================================================
   POST HERO CARD — bài đầu tiên dạng wide featured
   ============================================================ */
.post-hero-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--clr-bg-card);
  transition: all var(--trans-slow);
  margin-bottom: var(--space-lg);
}

.post-hero-card:hover {
  border-color: rgba(245,158,11,0.2);
  box-shadow: 0 16px 48px rgba(0,0,0,0.4);
  transform: translateY(-3px);
}

.post-hero-card__thumb-link {
  display: block;
  overflow: hidden;
}

.post-hero-card__thumb {
  width: 100%;
  height: 100%;
  min-height: 300px;
  background-color: var(--clr-bg-2);
  background-size: cover;
  background-position: center;
  position: relative;
  transition: transform var(--trans-slow);
}

.post-hero-card:hover .post-hero-card__thumb {
  transform: scale(1.03);
}

.post-hero-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(8,12,20,0.3) 0%, transparent 100%);
}

.post-hero-card__body {
  padding: var(--space-2xl);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-md);
}

.post-hero-card__title {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  line-height: 1.25;
  margin-bottom: 0;
}

.post-hero-card__title a {
  color: var(--clr-white);
  text-decoration: none;
  transition: color var(--trans-fast);
}

.post-hero-card__title a:hover { color: var(--clr-accent); }

.post-hero-card__excerpt {
  font-size: 0.9375rem;
  color: var(--clr-text-dim);
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0;
}

@media (max-width: 768px) {
  .post-hero-card {
    grid-template-columns: 1fr;
  }
  .post-hero-card__thumb {
    min-height: 200px;
    aspect-ratio: 16/9;
    height: auto;
  }
  .post-hero-card__body {
    padding: var(--space-lg);
  }
}

/* ============================================================
   WIDGET POSTS — Recent Posts Widget (sidebar)
   ============================================================ */
.widget-posts {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.widget-post {
  display: flex;
  gap: var(--space-sm);
  padding: 0.625rem 0;
  border-bottom: 1px solid var(--clr-border);
  text-decoration: none;
  align-items: flex-start;
  transition: background var(--trans-fast);
  border-radius: var(--radius-sm);
}

.widget-post:last-child { border-bottom: none; }

.widget-post:hover .widget-post__title {
  color: var(--clr-accent);
}

.widget-post__thumb {
  width: 80px;
  height: 45px;         /* 16:9 */
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
  background: var(--clr-bg-2);
  border: 1px solid var(--clr-border);
}

.widget-post__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--trans-normal);
}

.widget-post:hover .widget-post__thumb img { transform: scale(1.05); }

.widget-post__thumb-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  color: rgba(245,158,11,0.25);
  background: linear-gradient(135deg, var(--clr-bg-2), #1a2535);
}

.widget-post__info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.widget-post__cat {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--clr-accent);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.widget-post__title {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--clr-white);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color var(--trans-fast);
}

.widget-post__date {
  font-size: 0.7125rem;
  color: var(--clr-text-muted);
  margin-top: 2px;
}

/* ============================================================
   CAT PAGE — Sub-navigation pills
   ============================================================ */
.cat-sub-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255,255,255,0.06);
}

.cat-sub-nav__pill {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.35rem 0.875rem;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-full);
  color: var(--clr-text-dim);
  font-size: 0.8rem;
  font-weight: 500;
  text-decoration: none;
  transition: all var(--trans-fast);
}

.cat-sub-nav__pill:hover,
.cat-sub-nav__pill.active {
  background: rgba(245,158,11,0.12);
  border-color: rgba(245,158,11,0.3);
  color: var(--clr-accent);
}

.cat-sub-nav__count {
  background: rgba(255,255,255,0.07);
  padding: 0.1rem 0.375rem;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  color: var(--clr-text-muted);
}

/* ============================================================
   SINGLE POST — share buttons
   ============================================================ */
.post-share {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--clr-border);
  border-bottom: 1px solid var(--clr-border);
  margin-block: var(--space-xl);
}

.post-share__label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--clr-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-right: var(--space-xs);
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--trans-fast);
  font-family: var(--font-body);
}

.share-btn--fb {
  background: rgba(24,119,242,0.12);
  border: 1px solid rgba(24,119,242,0.25);
  color: #60A5FA;
}
.share-btn--fb:hover { background: rgba(24,119,242,0.2); color: #93C5FD; }

.share-btn--tw {
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--clr-border);
  color: var(--clr-text-dim);
}
.share-btn--tw:hover { border-color: var(--clr-accent); color: var(--clr-accent); }

.share-btn--copy {
  background: rgba(245,158,11,0.1);
  border: 1px solid rgba(245,158,11,0.2);
  color: var(--clr-accent);
}
.share-btn--copy:hover { background: rgba(245,158,11,0.18); }

/* ============================================================
   SINGLE POST — meta row (dùng trong header bài viết)
   ============================================================ */
.post-meta-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--clr-text-muted);
  margin-top: var(--space-lg);
}

.post-author {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--clr-text-dim);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--trans-fast);
}
.post-author:hover { color: var(--clr-accent); }

.post-author__avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 2px solid var(--clr-border);
  object-fit: cover;
}

.post-meta-sep { color: var(--clr-border); }

.post-date,
.post-readtime { color: var(--clr-text-muted); font-size: 0.875rem; }

/* ============================================================
   SINGLE POST — category badges (dưới breadcrumb)
   ============================================================ */
.post-cats {
  display: flex;
  gap: 0.375rem;
  flex-wrap: wrap;
  margin-bottom: var(--space-md);
}

.post-cat-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  background: rgba(245,158,11,0.1);
  border: 1px solid rgba(245,158,11,0.25);
  border-radius: var(--radius-full);
  color: var(--cat-color, var(--clr-accent));
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  text-decoration: none;
  transition: all var(--trans-fast);
  border-color: color-mix(in srgb, var(--cat-color, var(--clr-accent)) 40%, transparent);
  background: color-mix(in srgb, var(--cat-color, var(--clr-accent)) 10%, transparent);
}

.post-cat-badge:hover {
  background: color-mix(in srgb, var(--cat-color, var(--clr-accent)) 18%, transparent);
  color: var(--cat-color, var(--clr-accent));
}

/* ============================================================
   TOC BOX (Table of Contents)
   ============================================================ */
.toc-box {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-left: 3px solid var(--clr-accent);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.toc-box__title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--clr-accent);
  margin-bottom: var(--space-md);
}

#toc-nav {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

#toc-nav a {
  font-size: 0.875rem;
  color: var(--clr-text-dim);
  text-decoration: none;
  padding: 0.25rem 0;
  border-radius: var(--radius-sm);
  transition: color var(--trans-fast);
  display: block;
  line-height: 1.4;
}

#toc-nav a:hover { color: var(--clr-accent); }
#toc-nav a.toc-h3 { padding-left: 1rem; font-size: 0.8125rem; color: var(--clr-text-muted); }
#toc-nav a.toc-h3:hover { color: var(--clr-accent); }

/* ============================================================
   COMMENTS SECTION
   ============================================================ */
.comments-section {
  margin-top: var(--space-2xl);
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--clr-border);
}

.comments-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--clr-white);
  margin-bottom: var(--space-lg);
}

.comment-list { list-style: none; }

.comment {
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--clr-border);
}

.comment-author img {
  border-radius: 50%;
  border: 2px solid var(--clr-border);
  vertical-align: middle;
  margin-right: 0.5rem;
}

.comment-meta { font-size: 0.8125rem; color: var(--clr-text-muted); margin-bottom: var(--space-sm); }
.comment-body p { font-size: 0.9375rem; color: var(--clr-text-dim); }

.comment-form label { display: block; font-size: 0.875rem; color: var(--clr-text-dim); margin-bottom: 0.375rem; }
.comment-form input[type="text"],
.comment-form input[type="email"],
.comment-form input[type="url"],
.comment-form textarea {
  width: 100%;
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  color: var(--clr-white);
  font-family: var(--font-body);
  font-size: 0.9rem;
  padding: 0.65rem 1rem;
  outline: none;
  transition: border-color var(--trans-fast);
  margin-bottom: var(--space-md);
}
.comment-form input:focus,
.comment-form textarea:focus { border-color: var(--clr-accent); }
.comment-form textarea { min-height: 120px; resize: vertical; }

.comment-form .submit {
  background: linear-gradient(135deg, var(--clr-accent), #F97316);
  border: none;
  color: #000;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.7rem 1.75rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  font-family: var(--font-body);
  transition: all var(--trans-fast);
}
.comment-form .submit:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(245,158,11,0.4);
}


/* ============================================================
   HOME BLOG SECTION — layout bài viết mới nhất trang chủ
   ============================================================ */

/* Grid tổng: hero trái (2/3) + list phải (1/3) */
.home-blog-grid {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: var(--space-xl);
  align-items: start;
}

/* ── Hero card (bên trái) ── */
.home-blog-hero .post-hero-card {
  height: 100%;
}

.home-blog-hero .post-hero-card__thumb {
  min-height: 380px;
}

/* ── List bên phải ── */
.home-blog-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--clr-bg-card);
}

/* ── Mỗi item trong list ── */
.home-blog-item {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--clr-border);
  text-decoration: none;
  transition: background var(--trans-fast);
  align-items: flex-start;
}

.home-blog-item:last-of-type {
  border-bottom: none;
}

.home-blog-item:hover {
  background: rgba(255,255,255,0.03);
}

.home-blog-item:hover .home-blog-item__title {
  color: var(--clr-accent);
}

/* Thumbnail 16:9 nhỏ */
.home-blog-item__thumb {
  width: 120px;
  height: 68px;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--clr-bg-2);
  border: 1px solid var(--clr-border);
}

.home-blog-item__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--trans-normal);
}

.home-blog-item:hover .home-blog-item__thumb img {
  transform: scale(1.05);
}

.home-blog-item__thumb-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  color: rgba(245,158,11,0.2);
  background: linear-gradient(135deg, var(--clr-bg-2), #1a2535);
}

/* Body text */
.home-blog-item__body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
  justify-content: center;
}

.home-blog-item__cat {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.home-blog-item__title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--clr-white);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color var(--trans-fast);
  margin: 0;
}

.home-blog-item__meta {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.72rem;
  color: var(--clr-text-muted);
  margin-top: 2px;
}

/* "Xem tất cả" ở cuối list */
.home-blog-more-link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: var(--space-md) var(--space-lg);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--clr-accent);
  text-decoration: none;
  background: rgba(245,158,11,0.06);
  border-top: 1px solid var(--clr-border);
  transition: background var(--trans-fast), gap var(--trans-fast);
}

.home-blog-more-link:hover {
  background: rgba(245,158,11,0.12);
  gap: 0.65rem;
}

/* Responsive */
@media (max-width: 1024px) {
  .home-blog-grid {
    grid-template-columns: 1fr 320px;
    gap: var(--space-lg);
  }
}

@media (max-width: 768px) {
  .home-blog-grid {
    grid-template-columns: 1fr;
  }

  .home-blog-hero .post-hero-card__thumb {
    min-height: 200px;
  }
}

/* ============================================================
   PAGE TEMPLATE
   ============================================================ */

/* Container full-width page — rộng hơn post thường, tối đa 900px */
.container--page-full {
  max-width: 900px;
}

/* Wrapper full-width page */
.page-full-wrap {
  width: 100%;
}

/* page-body: cho phép nội dung WP editor + custom HTML tah-tos */
.page-body {
  width: 100%;
}

/* Tắt max-width mặc định của .prose khi ở trong full page */
.page-full-wrap .prose {
  max-width: 100%;
}

/* ── Post Header full-width ─────────────────────────────────── */
.post-header--full .post-header__inner {
  max-width: 100%;
}

/* ── Post Banner — dạng page (thêm content overlay) ─────────── */
.post-banner--page {
  max-height: 400px;
  position: relative;
}

.post-banner__content {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding-bottom: 2.5rem;
}

.post-banner__content .post-title {
  color: var(--clr-white);
  text-shadow: 0 2px 12px rgba(0,0,0,0.6);
}

.post-title--banner {
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  margin-bottom: 0.5rem;
}

/* ── Breadcrumb light (trên banner tối) ──────────────────────── */
.breadcrumb--light a,
.breadcrumb--light span {
  color: rgba(255,255,255,0.75);
}

.breadcrumb--light a:hover {
  color: var(--clr-accent);
}

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 768px) {
  .container--page-full {
    max-width: 100%;
  }

  .post-banner--page {
    max-height: 280px;
  }

  .post-banner__content {
    padding-bottom: 1.5rem;
  }
}