/* ============================================================
   VÂN THIÊN LONG - Main Frontend CSS v4.1 (clean rebuild)
   ============================================================ */

/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; overflow-x: hidden; }
body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  color: #fff;
  background: #0a0a0a;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  max-width: 100vw;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }

:root {
  --accent: #D4841A;
  --accent-dark: #B36F0E;
  --white: #fff;
  --dark: #0a0a0a;
  --dark2: #141414;
  --gray: #888;
  --gray-light: #ccc;
  --gray-border: rgba(255,255,255,.08);
  --radius: 6px;
  --header-h: 76px;
  --transition: .2s ease;
}

.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
@media (max-width: 640px) { .container { padding: 0 20px; } }
@media (max-width: 380px) { .container { padding: 0 16px; } }

h1, h2, h3, h4 { margin: 0 0 16px; line-height: 1.3; font-weight: 700; }
h1 { font-size: 2.5rem; }
h2 { font-size: 1.875rem; }
h3 { font-size: 1.25rem; }
@media (max-width: 768px) { h1 { font-size: 1.875rem; } h2 { font-size: 1.5rem; } }
p { margin: 0 0 16px; }
.text-center { text-align: center; }
.mb-2 { margin-bottom: 8px; } .mb-4 { margin-bottom: 16px; } .mb-6 { margin-bottom: 24px; }
.mt-2 { margin-top: 8px; } .mt-4 { margin-top: 16px; } .mt-6 { margin-top: 24px; } .mt-8 { margin-top: 32px; }
.text-muted { color: var(--gray); }
.form-hint { color: var(--gray); font-size: .78rem; margin-top: 4px; display: block; }

/* ===== HEADER ===== */
.site-header {
  position: sticky; top: 0; left: 0; right: 0;
  background: var(--dark);
  border-bottom: 1px solid var(--gray-border);
  z-index: 900;
  height: var(--header-h);
}
.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.site-logo { display: inline-flex; align-items: center; gap: 12px; flex-shrink: 0; }
.logo-img { height: 44px; width: auto; }
.site-brand { display: flex; flex-direction: column; line-height: 1.1; }
.site-brand-name { font-size: 1.1rem; font-weight: 800; color: #fff; letter-spacing: .08em; }
.site-brand-tagline { font-size: .7rem; color: var(--accent); letter-spacing: .18em; text-transform: uppercase; margin-top: 2px; font-weight: 600; }
@media (max-width: 640px) {
  .site-brand-name { font-size: .95rem; }
  .site-brand-tagline { font-size: .62rem; letter-spacing: .12em; }
  .logo-img { height: 36px; }
}

/* ===== NAVIGATION (clean v4.1) ===== */
.main-nav { display: flex; align-items: center; }
.main-nav .nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.main-nav .nav-list li { margin: 0; padding: 0; }
.nav-link {
  display: inline-block;
  padding: 8px 14px;
  font-size: .875rem;
  font-weight: 500;
  color: var(--gray-light);
  border-radius: var(--radius);
  transition: var(--transition);
  cursor: pointer;
}
.nav-link:hover, .nav-link.active { color: #fff; }
.nav-link.cta-nav {
  background: var(--accent);
  color: #fff;
  margin-left: 8px;
  padding: 8px 20px;
}
.nav-link.cta-nav:hover { background: var(--accent-dark); color: #fff; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  background: none;
  border: none;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: var(--transition);
}

.nav-has-dropdown { position: relative; }
.nav-toggle-caret {
  display: inline-block;
  font-size: .7rem;
  margin-left: 4px;
  transition: transform .2s;
}
.nav-submenu {
  display: none;
  list-style: none;
  margin: 0;
  padding: 0;
}

/* DESKTOP nav */
@media (min-width: 901px) {
  .nav-submenu {
    position: absolute;
    top: calc(100% + 4px);
    left: 50%;
    transform: translateX(-50%);
    min-width: 240px;
    background: #1a1a1a;
    border: 1px solid #303030;
    border-radius: 8px;
    padding: 8px 0;
    box-shadow: 0 12px 32px rgba(0,0,0,.6);
    z-index: 1001;
  }
  .nav-submenu::before {
    content: '';
    position: absolute;
    top: -10px;
    left: 0;
    right: 0;
    height: 10px;
  }
  .nav-has-dropdown:hover > .nav-submenu,
  .nav-has-dropdown.is-open > .nav-submenu { display: block; }
  .nav-submenu li { display: block; }
  .nav-submenu a {
    display: block;
    padding: 10px 18px;
    color: #ddd;
    font-size: .92rem;
    font-weight: 500;
    text-decoration: none;
    white-space: nowrap;
    transition: background .15s, color .15s;
  }
  .nav-submenu a:hover { background: rgba(212,132,26,.12); color: var(--accent); }
  .nav-has-dropdown:hover .nav-toggle-caret,
  .nav-has-dropdown.is-open .nav-toggle-caret { transform: rotate(180deg); }
}

/* MOBILE nav */
@media (max-width: 900px) {
  .hamburger { display: flex; }
  .main-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    height: 100dvh;
    background: var(--dark2);
    padding: 84px 16px 24px;
    transition: right .3s ease;
    z-index: 950;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
  }
  .main-nav.open { right: 0; box-shadow: -4px 0 40px rgba(0,0,0,.6); }
  .main-nav .nav-list {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 2px;
    width: 100%;
    margin: 0;
    padding: 0;
    list-style: none;
  }
  .main-nav .nav-list > li {
    width: 100%;
    margin: 0;
  }
  .nav-link {
    display: block;
    width: 100%;
    font-size: 1rem;
    padding: 13px 16px;
    border-radius: 6px;
  }
  .nav-link:hover, .nav-link.active { background: rgba(212,132,26,.08); }
  .nav-link.cta-nav {
    margin-left: 0;
    margin-top: 12px;
    text-align: center;
    background: var(--accent);
    color: #fff;
  }
  .nav-submenu {
    display: none;
    background: rgba(255,255,255,.04);
    border-radius: 6px;
    margin: 2px 0 0;
    padding: 4px 0;
  }
  .nav-has-dropdown.is-open > .nav-submenu { display: block; }
  .nav-submenu li { display: block; width: 100%; }
  .nav-submenu a {
    display: block;
    padding: 10px 28px;
    color: #ccc;
    font-size: .9rem;
    text-decoration: none;
  }
  .nav-submenu a:hover, .nav-submenu a:active { color: var(--accent); background: rgba(212,132,26,.1); }
  .nav-has-dropdown.is-open .nav-toggle-caret { transform: rotate(180deg); }
}

main { min-height: 60vh; }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  font-size: .9rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); }
.btn-outline { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
.btn-outline:hover { background: var(--accent); color: #fff; }
.btn-outline-light { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,.3); }
.btn-outline-light:hover { background: rgba(255,255,255,.1); }
.btn-lg { padding: 14px 32px; font-size: 1rem; }
.btn-sm { padding: 7px 14px; font-size: .82rem; }

/* ===== HERO ===== */
.hero {
  position: relative;
  min-height: 600px;
  display: flex;
  align-items: center;
  background: var(--dark);
  overflow: hidden;
}
/* Background image layer - render real banner image */
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  z-index: 1;
}
.hero-bg-default {
  background:
    linear-gradient(135deg, rgba(212,132,26,.12) 0%, transparent 60%),
    radial-gradient(ellipse at 70% 30%, rgba(212,132,26,.15) 0%, transparent 50%),
    linear-gradient(135deg, #1a1a1a 0%, #0a0a0a 70%) !important;
}
.hero-bg-default::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(45deg, rgba(212,132,26,.03) 0 1px, transparent 1px 80px),
    repeating-linear-gradient(-45deg, rgba(212,132,26,.03) 0 1px, transparent 1px 80px);
  pointer-events: none;
}
/* Overlay for text contrast - đủ tối để chữ đọc được nhưng không đè kín ảnh */
.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(0,0,0,.75) 0%, rgba(0,0,0,.45) 50%, rgba(0,0,0,.25) 100%);
  z-index: 2;
}
.hero-content {
  position: relative;
  z-index: 3;
  max-width: 720px;
  padding-top: 80px;
  padding-bottom: 80px;
}
.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(212,132,26,.15);
  color: var(--accent);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .15em;
  border-radius: 100px;
  margin-bottom: 16px;
  text-transform: uppercase;
}
.hero-title { font-size: 3.5rem; font-weight: 800; line-height: 1.15; margin-bottom: 20px; word-wrap: break-word; overflow-wrap: break-word; }
.hero-title-accent { color: var(--accent); display: block; }
.hero-desc { font-size: 1.05rem; color: #ddd; margin-bottom: 28px; }
.hero-cta, .hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-hotline { margin-top: 24px; font-size: 1rem; color: #fff; }
.hero-hotline a { color: var(--accent); font-weight: 700; }
@media (max-width: 768px) {
  .hero { min-height: 500px; }
  .hero-content { padding-top: 60px; padding-bottom: 60px; }
  .hero-title { font-size: 2rem; line-height: 1.2; }
  .hero-desc { font-size: .92rem; }
  .hero-cta, .hero-actions { gap: 14px; }
  .hero-cta .btn, .hero-actions .btn { flex: 1 1 100%; text-align: center; margin: 0; }
  .hero-cta .btn + .btn, .hero-actions .btn + .btn { margin-top: 0; }
}
@media (max-width: 480px) {
  .hero-title { font-size: 1.75rem; }
  .hero-content { padding-top: 48px; padding-bottom: 48px; }
}

.section { padding: 80px 0; }
.section-bg-dark, .bg-dark { background: var(--dark2); }
.section-header { margin-bottom: 48px; }
.section-label {
  font-size: .78rem;
  color: var(--accent);
  letter-spacing: .2em;
  text-transform: uppercase;
  font-weight: 700;
  margin-bottom: 8px;
}
.section-title { font-size: 2.25rem; font-weight: 800; }
.section-header-flex {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}
@media (max-width: 768px) {
  .section { padding: 40px 0; }
  .section-title { font-size: 1.75rem; }
  .section-header { margin-bottom: 28px; }
  .section-header-flex {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 22px;
  }
  .section-header-flex > a.btn,
  .section-header-flex > .btn {
    align-self: stretch;
    text-align: center;
  }
}
@media (max-width: 480px) {
  .section { padding: 32px 0; }
  .section-header { margin-bottom: 22px; }
}

/* ===== INTRO ===== */
.intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.intro-image {
  position: relative;
  display: block;
  width: 100%;
  max-width: 100%;
}
.intro-img-wrap, .intro-img-wrapper {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  aspect-ratio: 4/3;
  background: #1a1a1a;
  width: 100%;
  min-height: 300px;
}
.intro-img-wrap img, .intro-img-wrapper img, .intro-img-photo {
  width: 100% !important;
  height: 100% !important;
  aspect-ratio: 4/3;
  object-fit: cover;
  display: block !important;
  position: absolute;
  inset: 0;
}
.intro-img-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #444;
}
/* Badge nằm ĐÈ LÊN ảnh xưởng, góc dưới phải, trong khung ảnh */
.intro-img-badge {
  position: absolute;
  bottom: 24px;
  right: 24px;
  background: var(--accent);
  color: #fff;
  padding: 14px 22px;
  border-radius: 8px;
  font-size: .95rem;
  z-index: 4;
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  box-shadow: 0 8px 24px rgba(0,0,0,.4);
  max-width: calc(100% - 48px);
}
.intro-img-badge strong { font-weight: 800; font-size: 1rem; }
.intro-img-badge span { font-size: .82rem; opacity: .92; margin-top: 2px; }
@media (max-width: 900px) {
  .intro-grid { grid-template-columns: 1fr; gap: 32px; }
  .intro-text { word-wrap: break-word; overflow-wrap: break-word; }
  .intro-img-wrap, .intro-img-wrapper { min-height: 240px; }
}
@media (max-width: 480px) {
  .intro-img-badge { bottom: 12px; right: 12px; padding: 10px 14px; }
  .intro-img-badge strong { font-size: .88rem; }
  .intro-img-badge span { font-size: .72rem; }
  .intro-img-wrap, .intro-img-wrapper { min-height: 200px; }
  .intro-text h2 { font-size: 1.5rem; line-height: 1.2; }
}

/* ===== SERVICES ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.service-card {
  padding: 32px 24px;
  background: var(--dark2);
  border: 1px solid var(--gray-border);
  border-radius: 8px;
  transition: var(--transition);
}
.service-card:hover { border-color: var(--accent); transform: translateY(-4px); }
.service-icon {
  width: 56px; height: 56px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(212,132,26,.1);
  color: var(--accent);
  border-radius: 8px;
  margin-bottom: 16px;
}
.service-card h3 { font-size: 1.15rem; margin-bottom: 8px; }
.service-card p { color: var(--gray); font-size: .9rem; margin-bottom: 14px; }
.service-link { color: var(--accent); font-weight: 600; font-size: .9rem; }

/* ===== PROJECTS ===== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}
.projects-grid-page { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.project-card { background: var(--dark2); border-radius: 8px; overflow: hidden; transition: var(--transition); }
.project-card:hover { transform: translateY(-4px); }
.project-card-inner { display: block; color: inherit; text-decoration: none; }
.project-img-wrap { position: relative; aspect-ratio: 4/3; overflow: hidden; background: #1a1a1a; }
.project-img-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s; }
.project-card:hover .project-img-wrap img { transform: scale(1.05); }
.project-img-placeholder {
  width: 100%; height: 100%;
  background-color: #161616;
  position: relative;
  overflow: hidden;
}
.project-img-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: var(--vtl-placeholder-logo, url('../images/placeholder-vtl.svg'));
  background-size: 60% auto;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0.15;
  filter: grayscale(0.3);
}
.project-img-placeholder svg { display: none; }
.project-cat-badge {
  position: absolute;
  top: 12px; left: 12px;
  background: rgba(0,0,0,.7);
  backdrop-filter: blur(4px);
  color: #fff;
  padding: 4px 10px;
  font-size: .72rem;
  border-radius: 4px;
  font-weight: 600;
  z-index: 2;
}
.project-info { padding: 20px; }
.project-title { font-size: 1.05rem; font-weight: 700; margin-bottom: 6px; line-height: 1.35; }
.project-meta { display: flex; gap: 12px; color: var(--gray); font-size: .82rem; margin: 0 0 12px; flex-wrap: wrap; }
.project-link-text { color: var(--accent); font-weight: 600; font-size: .85rem; }

/* ===== POSTS ===== */
.posts-tabs-header {
  display: flex; align-items: end; justify-content: space-between;
  margin-bottom: 36px; gap: 24px; flex-wrap: wrap;
}
.posts-tabs-links { display: flex; gap: 10px; }
.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.post-card { background: var(--dark2); border: 1px solid var(--gray-border); border-radius: 8px; overflow: hidden; transition: var(--transition); }
.post-card:hover { border-color: var(--accent); transform: translateY(-4px); }
.post-card a { display: block; color: inherit; text-decoration: none; }
.post-img-wrap { aspect-ratio: 16/9; background: #1a1a1a; overflow: hidden; }
.post-img-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s; }
.post-card:hover .post-img-wrap img { transform: scale(1.05); }
.post-img-placeholder {
  width: 100%; height: 100%;
  background-color: #161616;
  position: relative;
  overflow: hidden;
}
.post-img-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: var(--vtl-placeholder-logo, url('../images/placeholder-vtl.svg'));
  background-size: 55% auto;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0.15;
  filter: grayscale(0.3);
}
.post-body { padding: 20px; }
.post-type-label, .post-cat-label {
  display: inline-block;
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}
.post-title { font-size: 1.05rem; font-weight: 700; line-height: 1.4; margin-bottom: 8px; }
.post-excerpt { color: var(--gray); font-size: .88rem; margin-bottom: 12px; line-height: 1.55; }
.post-date { color: var(--gray); font-size: .8rem; }

.posts-layout { display: grid; grid-template-columns: 1fr 280px; gap: 40px; align-items: start; }
.posts-main { min-width: 0; }
.post-detail-footer {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--gray-border);
  margin-bottom: 16px;
}
.posts-sidebar { position: sticky; top: calc(var(--header-h) + 20px); }
.sidebar-widget { background: var(--dark2); border-radius: 8px; padding: 20px; margin-bottom: 20px; }
.sidebar-widget-title { font-size: .82rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: #fff; margin-bottom: 12px; }
.sidebar-widget ul { list-style: none; padding: 0; margin: 0; }
.sidebar-widget li { margin-bottom: 8px; }
.sidebar-widget a { color: var(--gray-light); font-size: .9rem; }
.sidebar-widget a:hover { color: var(--accent); }
.sidebar-cta { background: var(--accent); padding: 24px; border-radius: 8px; }
.sidebar-cta h3 { font-size: 1.1rem; color: #fff; margin-bottom: 8px; }
.sidebar-cta p { color: rgba(255,255,255,.85); font-size: .9rem; margin-bottom: 14px; }
.sidebar-cta a { display: block; padding: 10px; background: #fff; color: var(--accent); text-align: center; border-radius: 6px; font-weight: 700; }
@media (max-width: 900px) {
  .posts-layout { grid-template-columns: 1fr; gap: 28px; }
  .posts-sidebar { position: static; margin-top: 8px; }
  .post-detail-footer { margin-bottom: 28px; }
}

.filter-cats { display: flex; flex-wrap: wrap; gap: 8px; }
.filter-btn {
  display: inline-block;
  padding: 8px 16px;
  background: var(--dark2);
  color: var(--gray-light);
  border: 1px solid var(--gray-border);
  border-radius: 100px;
  font-size: .85rem;
  text-decoration: none;
  transition: var(--transition);
}
.filter-btn:hover, .filter-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.search-form { display: flex; gap: 0; max-width: 480px; }
.search-input {
  flex: 1;
  padding: 10px 16px;
  background: var(--dark2);
  border: 1px solid var(--gray-border);
  border-right: none;
  border-radius: 6px 0 0 6px;
  color: #fff;
  font-size: .9rem;
}
.search-input:focus { outline: none; border-color: var(--accent); }
.search-btn {
  padding: 10px 16px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 0 6px 6px 0;
}

.pagination { display: flex; justify-content: center; gap: 6px; margin-top: 40px; flex-wrap: wrap; }
.pagination a, .pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  padding: 8px 12px;
  background: var(--dark2);
  color: var(--gray-light);
  border-radius: 6px;
  text-decoration: none;
  font-size: .9rem;
}
.pagination .active { background: var(--accent); color: #fff; font-weight: 700; }
.pagination a:hover { background: rgba(212,132,26,.2); color: var(--accent); }

.breadcrumb-bar { background: var(--dark2); border-bottom: 1px solid var(--gray-border); padding: 12px 0; }
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: .82rem;
  color: var(--gray);
  list-style: none;
  padding: 0;
  margin: 0;
}
.breadcrumb li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb li + li::before {
  content: '›';
  color: #555;
  font-size: 1rem;
  line-height: 1;
}
.breadcrumb a { color: var(--accent); }
.breadcrumb-sep { color: #555; }
@media (max-width: 480px) {
  .breadcrumb { font-size: .75rem; gap: 6px; }
  .breadcrumb li + li::before { font-size: .9rem; }
}

.page-section { padding: 56px 0; }
.page-header { margin-bottom: 40px; }
.page-title { font-size: 2.25rem; font-weight: 800; margin: 0; }
.empty-state { padding: 60px 24px; text-align: center; color: var(--gray); }

.post-detail-hero {
  padding: 48px 0 24px;
  background: linear-gradient(180deg, var(--dark2) 0%, transparent 100%);
}
.post-meta-bar { display: flex; gap: 14px; color: var(--gray); font-size: .85rem; margin-bottom: 14px; flex-wrap: wrap; }
.post-detail-title { font-size: 2.25rem; font-weight: 800; line-height: 1.25; margin-bottom: 20px; }
.post-detail-excerpt { font-size: 1.05rem; color: var(--gray-light); border-left: 3px solid var(--accent); padding-left: 18px; margin-bottom: 24px; }
.post-detail-img { width: 100%; aspect-ratio: 16/9; object-fit: cover; border-radius: 8px; margin-bottom: 32px; }
.post-detail-content { font-size: 1.02rem; line-height: 1.8; color: #ddd; }
.post-detail-content h2 { font-size: 1.5rem; margin: 32px 0 16px; color: #fff; }
.post-detail-content h3 { font-size: 1.2rem; margin: 24px 0 12px; color: #fff; }
.post-detail-content p { margin-bottom: 16px; }
.post-detail-content a { color: var(--accent); text-decoration: underline; }
.post-detail-content img { max-width: 100%; height: auto; border-radius: 6px; margin: 20px 0; }
.post-detail-content ul, .post-detail-content ol { padding-left: 28px; margin-bottom: 16px; }
.post-detail-content li { margin-bottom: 8px; }
.post-detail-content blockquote {
  border-left: 4px solid var(--accent);
  padding-left: 20px;
  margin: 20px 0;
  color: var(--gray-light);
  font-style: italic;
}
.post-back-link { display: inline-block; margin-top: 32px; color: var(--accent); font-weight: 600; }
.hero-cat-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(212,132,26,.15);
  color: var(--accent);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  border-radius: 100px;
  margin-bottom: 16px;
}

.project-hero-img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 32px;
}
.project-detail-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
  background: var(--dark2);
  padding: 24px;
  border-radius: 8px;
  margin-bottom: 32px;
}
.meta-item-label { font-size: .72rem; color: var(--gray); text-transform: uppercase; letter-spacing: .12em; margin-bottom: 4px; }
.meta-item-value { font-size: 1rem; color: #fff; font-weight: 600; }
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
  margin-top: 24px;
}
.gallery-grid img { aspect-ratio: 4/3; object-fit: cover; border-radius: 6px; }

.why-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 32px; }
.why-item { padding: 24px; }
.why-icon { font-size: 2rem; font-weight: 800; color: var(--accent); margin-bottom: 12px; }
.why-item h3 { font-size: 1.05rem; }
.why-item p { color: var(--gray); font-size: .9rem; margin: 0; }

.cta-section { padding: 64px 0; background: var(--accent); text-align: center; }
.cta-section h2 { color: #fff; }
.cta-section p { color: rgba(255,255,255,.9); font-size: 1.05rem; margin-bottom: 28px; }
.cta-buttons { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.cta-section .btn-primary { background: #fff; color: var(--accent); }
.cta-section .btn-primary:hover { background: var(--dark); color: #fff; }

.form-row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: .85rem; font-weight: 600; margin-bottom: 6px; color: var(--gray-light); }
.form-control {
  width: 100%;
  padding: 10px 14px;
  background: var(--dark2);
  border: 1px solid var(--gray-border);
  border-radius: 6px;
  color: #fff;
  font-family: inherit;
  font-size: .92rem;
}
.form-control:focus { outline: none; border-color: var(--accent); }
textarea.form-control { resize: vertical; min-height: 100px; }
@media (max-width: 640px) { .form-row-2, .form-row-3 { grid-template-columns: 1fr; } }

.alert { padding: 14px 18px; border-radius: 6px; margin-bottom: 20px; }
.alert-success { background: rgba(16,185,129,.1); color: #10b981; border-left: 3px solid #10b981; }
.alert-error { background: rgba(220,38,38,.1); color: #f87171; border-left: 3px solid #dc2626; }
.alert-info { background: rgba(212,132,26,.1); color: var(--accent); border-left: 3px solid var(--accent); }

/* ===== CONTACT PAGE ===== */
.contact-layout {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 48px;
  align-items: start;
}
.contact-form-wrap h2,
.contact-info-wrap h2 {
  font-size: 1.4rem;
  font-weight: 800;
  margin: 0 0 20px;
}
.contact-form-wrap { padding-bottom: 8px; }
.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px;
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.06);
  border-radius: 10px;
  transition: border-color .15s, background .15s;
}
.contact-info-item:hover { border-color: rgba(212,132,26,.4); background: rgba(212,132,26,.04); }
.contact-info-icon {
  flex: 0 0 40px;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: rgba(212,132,26,.12);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
}
.contact-info-item > div:last-child { flex: 1; min-width: 0; }
.contact-info-item strong {
  display: block;
  font-size: .82rem;
  color: var(--gray);
  font-weight: 600;
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.contact-info-item p {
  margin: 0;
  color: #fff;
  font-size: .95rem;
  line-height: 1.4;
  word-break: break-word;
}
.contact-info-item a { color: var(--accent); text-decoration: none; }
.contact-info-item a:hover { text-decoration: underline; }
.contact-map {
  margin-top: 24px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--gray-border);
}
.contact-map iframe { display: block; width: 100%; min-height: 280px; border: 0; }

@media (max-width: 900px) {
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .contact-form-wrap { padding-bottom: 16px; border-bottom: 1px solid var(--gray-border); }
}
@media (max-width: 480px) {
  .contact-info-item { padding: 14px; gap: 12px; }
  .contact-info-icon { flex: 0 0 36px; width: 36px; height: 36px; }
  .contact-info-icon svg { width: 18px; height: 18px; }
}

/* ===== CTA SECTION ===== */
.section-cta { background: linear-gradient(135deg, #0f0f0f 0%, #1a1a1a 100%); }
.cta-box {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
  align-items: center;
  padding: 48px 40px;
  background: rgba(212,132,26,.04);
  border: 1px solid rgba(212,132,26,.18);
  border-radius: 14px;
}
.cta-content h2 { font-size: 1.85rem; font-weight: 800; margin: 0 0 12px; line-height: 1.2; }
.cta-content p { color: #bbb; margin: 0; line-height: 1.6; }
.cta-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.cta-actions .btn { width: 100%; text-align: center; justify-content: center; }
@media (max-width: 768px) {
  .cta-box {
    grid-template-columns: 1fr;
    padding: 32px 22px;
    gap: 24px;
  }
  .cta-content h2 { font-size: 1.5rem; }
  .cta-content p { font-size: .92rem; }
}

/* ===== FOOTER (clean v4.1) ===== */
.site-footer {
  background: var(--dark);
  border-top: 1px solid var(--gray-border);
  color: var(--gray-light);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.4fr;
  gap: 48px;
  padding: 56px 0 40px;
}
.footer-brand { display: flex; flex-direction: column; gap: 20px; }
.footer-brand-link { display: flex; align-items: center; gap: 12px; text-decoration: none; color: inherit; }
.footer-logo { width: 48px; height: 48px; flex-shrink: 0; object-fit: contain; }
.footer-brand-text { display: flex; flex-direction: column; gap: 2px; }
.footer-brand-name { font-size: 1rem; font-weight: 800; color: #fff; letter-spacing: .04em; line-height: 1.2; }
.footer-brand-slogan { font-size: .72rem; color: #888; font-style: italic; letter-spacing: .03em; text-transform: uppercase; }

.footer-hotline {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  background: rgba(212,132,26,.08);
  border-left: 3px solid var(--accent);
  border-radius: 4px;
}
.footer-hotline-label {
  font-size: .68rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.footer-hotline-number {
  color: var(--accent);
  font-size: 1.35rem;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: .02em;
}
.footer-hotline-number:hover { color: #E89B3F; }

.footer-social { display: flex; gap: 10px; }
.footer-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: rgba(255,255,255,.06);
  color: #aaa;
  border-radius: 6px;
  transition: .15s;
}
.footer-social a:hover { background: var(--accent); color: #fff; }

.footer-heading {
  font-size: .82rem;
  font-weight: 700;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: .06em;
  margin: 0 0 16px;
}
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin: 0 0 10px; }
.footer-links a { color: #aaa; text-decoration: none; font-size: .9rem; transition: color .15s; }
.footer-links a:hover { color: var(--accent); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 20px 0;
}
.footer-bottom-grid {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.footer-bottom-text { flex: 1; min-width: 280px; }
.footer-bottom-text p { margin: 0; font-size: .85rem; color: #aaa; line-height: 1.6; }
.footer-bottom-small { font-size: .78rem !important; color: #777 !important; margin-top: 4px !important; }
@media (max-width: 768px) {
  .footer-bottom-grid {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 16px;
  }
  .footer-bottom-text { min-width: 0; }
}

.footer-bct-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  background: transparent;
  padding: 6px 0;
  border-radius: 6px;
  transition: transform .15s;
  max-width: 240px;
  height: 56px;
  box-sizing: border-box;
}
.footer-bct-badge:hover { transform: scale(1.04); }
.footer-bct-badge img {
  display: block;
  width: auto !important;
  height: 44px !important;
  max-height: 44px !important;
  max-width: 220px !important;
  object-fit: contain;
  /* Loại bỏ background trắng quanh logo PNG (giữ phần màu) */
  mix-blend-mode: screen;
  background: transparent;
  filter: drop-shadow(0 1px 2px rgba(0,0,0,.3));
}
.footer-bct-badge svg { flex-shrink: 0; width: 40px; height: 40px; }
.footer-bct-text { display: flex; flex-direction: column; line-height: 1; }
.footer-bct-text strong { color: #e8eaed; font-size: .78rem; font-weight: 800; }
.footer-bct-text small { color: #b0b3b8; font-size: .7rem; font-weight: 600; }

@media (max-width: 1024px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; } }
@media (max-width: 600px) {
  .footer-grid {
    /* footer-brand = full width row 1, sau đó 2 col cho 3 col còn lại */
    grid-template-columns: 1fr 1fr;
    gap: 28px 20px;
    padding: 36px 0 24px;
  }
  .footer-brand { grid-column: 1 / -1; }
  .footer-col h4, .footer-col-title { font-size: .85rem; margin-bottom: 12px; }
  .footer-links li { margin-bottom: 8px; }
  .footer-links a { font-size: .85rem; }
  .footer-bct-badge { max-width: 200px; height: 48px; }
  .footer-bct-badge img { height: 36px !important; max-height: 36px !important; max-width: 180px !important; }
}
@media (max-width: 380px) {
  .footer-grid { gap: 24px 16px; }
}

.floating-zalo, .floating-phone {
  position: fixed;
  right: 20px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  z-index: 800;
  box-shadow: 0 4px 20px rgba(0,0,0,.4);
  transition: var(--transition);
}
.floating-zalo { bottom: 90px; background: #0068FF; }
.floating-phone { bottom: 20px; background: var(--accent); }
.floating-zalo:hover, .floating-phone:hover { transform: scale(1.08); }
@media (max-width: 480px) {
  .floating-zalo, .floating-phone { width: 50px; height: 50px; right: 14px; }
  .floating-zalo { bottom: 76px; }
  .floating-phone { bottom: 14px; }
}
/* Đảm bảo content không bị float button che - thêm padding-bottom cho main */
@media (max-width: 768px) {
  body { padding-bottom: 12px; }
}