/* ============================================================
   TRUONG THCS - THPT HAI BA TRUNG - DESIGN SYSTEM
   Dua tren khung framework/, tuy chinh mau sac/typography/
   them cac khoi rieng: mega-dropdown, hero SVG, chuong trinh
   giao duc, thong ke, bao chi, hoc phi, timeline lich su...
   ============================================================ */

:root {
  /* ---- 1. Brand ---- */
  --color-primary: #7a1f2b;        /* do do / maroon truyen thong */
  --color-primary-dark: #55141d;   /* maroon dam hon cho gradient/footer */
  --color-secondary: #c9a35d;      /* vang dong / gold nhe */
  --color-secondary-light: #e4cb96;
  --color-bg: #faf6ee;             /* nen kem am */
  --color-surface: #ffffff;
  --color-text: #2a1e1c;
  --color-text-muted: #6c5f56;
  --color-border: #e7dcc9;

  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, sans-serif;

  --radius-sm: 6px;
  --radius-md: 14px;
  --radius-lg: 28px;

  --container-width: 1180px;
  --section-padding: clamp(56px, 8vw, 120px);

  --shadow-soft: 0 10px 40px rgba(85, 20, 29, 0.10);
  --shadow-strong: 0 20px 60px rgba(85, 20, 29, 0.22);

  --transition: 0.25s ease;
}

/* ---- 2. Reset co ban ---- */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.25;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: var(--section-padding) 0; }
.section--alt { background: var(--color-surface); }
.section--maroon {
  background: linear-gradient(160deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
}
.section--maroon .section-title { color: #fff; }
.section--maroon .section-desc { color: rgba(255,255,255,0.82); }
.section--maroon .eyebrow { color: var(--color-secondary-light); }

.eyebrow {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-secondary);
  font-weight: 700;
  margin-bottom: 12px;
}
.section-title { font-size: clamp(28px, 4vw, 42px); margin-bottom: 16px; }
.section-desc { color: var(--color-text-muted); max-width: 640px; }
.section-head { text-align: center; margin: 0 auto 48px; max-width: 760px; }
.section-head.align-left { text-align: left; margin: 0 0 40px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.02em;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}
.btn--primary {
  background: var(--color-secondary);
  color: #2a1e1c;
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-soft); }
.btn--outline {
  border: 1.5px solid rgba(255,255,255,0.6);
  color: inherit;
}
.btn--outline:hover { border-color: var(--color-secondary); color: var(--color-secondary); }
.btn--outline-dark {
  border: 1.5px solid var(--color-border);
  color: var(--color-text);
}
.btn--outline-dark:hover { border-color: var(--color-primary); color: var(--color-primary); }

/* ---- 3. Header / Nav / Mega menu ---- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(250, 246, 238, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), background var(--transition);
}
.site-header.is-scrolled { border-color: var(--color-border); box-shadow: 0 2px 18px rgba(85,20,29,0.06); }
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 84px;
}
.brand {
  font-family: var(--font-heading);
  font-size: 19px;
  font-weight: 700;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 10px;
  line-height: 1.2;
}
.brand-mark { flex-shrink: 0; object-fit: contain; }
.brand-name-full { display: flex; flex-direction: column; }
.brand-name-full small { font-family: var(--font-body); font-weight: 500; font-size: 11px; color: var(--color-text-muted); letter-spacing: 0.04em; }

.nav { display: flex; align-items: center; gap: 30px; }
.nav > a, .nav-item > .nav-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.nav > a:hover, .nav-item > .nav-link:hover { color: var(--color-primary); }
.nav-item { position: relative; }
.nav-item .caret { font-size: 9px; opacity: 0.6; }

.mega-dropdown {
  position: absolute;
  top: calc(100% + 18px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-strong);
  padding: 18px;
  min-width: 300px;
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(6px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  z-index: 50;
}
.nav-item:hover .mega-dropdown,
.nav-item:focus-within .mega-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.mega-dropdown a { display: block; font-size: 13.5px; font-weight: 500; padding: 9px 10px; border-radius: 8px; color: var(--color-text); }
.mega-dropdown a:hover { background: var(--color-bg); color: var(--color-primary); }

.nav-cta { margin-left: 6px; }

.lang-toggle { display: none; }
.nav-toggle { display: none; }

/* ---- 4. Hero (khong dung anh that - SVG + gradient) ---- */
.hero {
  position: relative;
  min-height: 94vh;
  display: flex;
  align-items: center;
  color: #fff;
  overflow: hidden;
  background: linear-gradient(150deg, var(--color-primary-dark) 0%, var(--color-primary) 55%, #8a2733 100%);
  padding-top: 84px;
}
.hero-pattern {
  position: absolute;
  inset: 0;
  opacity: 0.16;
  pointer-events: none;
}
.hero-pattern svg { width: 100%; height: 100%; }
.hero .container {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}
.hero-content { max-width: 640px; }
.hero .eyebrow { color: var(--color-secondary-light); }
.hero h1 { font-size: clamp(32px, 5vw, 54px); color: #fff; margin-bottom: 20px; }
.hero p { font-size: 17px; color: rgba(255,255,255,0.88); margin-bottom: 32px; max-width: 560px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 40px; }
.hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  max-width: 480px;
}
.hero-stat {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.22);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  backdrop-filter: blur(4px);
}
.hero-stat .num { font-family: var(--font-heading); font-size: 26px; color: var(--color-secondary-light); display:block; }
.hero-stat .label { font-size: 12.5px; color: rgba(255,255,255,0.82); line-height: 1.4; }
.hero-visual { position: relative; display: flex; align-items: center; justify-content: center; }
.hero-visual img {
  width: 100%;
  max-width: 340px;
  aspect-ratio: 685 / 884;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-strong);
}

/* ---- 5. About / mission teaser ---- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.about-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  min-height: 340px;
}
.about-media img { width: 100%; height: 100%; min-height: 340px; object-fit: cover; display: block; }
.about-stats { display: flex; gap: 40px; margin-top: 32px; flex-wrap: wrap; }
.stat-num { font-family: var(--font-heading); font-size: 32px; color: var(--color-primary); }
.stat-label { font-size: 13px; color: var(--color-text-muted); }

/* ---- 6. Program / value cards ---- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.card-grid--2 { grid-template-columns: repeat(2, 1fr); }
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-soft); border-color: var(--color-secondary); }
.card-icon {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: rgba(122, 31, 43, 0.08);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
  color: var(--color-primary);
  font-size: 20px;
  font-family: var(--font-heading);
  font-weight: 700;
}
.card h3 { font-size: 19px; margin-bottom: 10px; color: var(--color-primary); }
.card p { color: var(--color-text-muted); font-size: 14.5px; }
.card .card-link { display: inline-block; margin-top: 14px; font-size: 13px; font-weight: 700; color: var(--color-secondary); }

/* ---- 7. Values / philosophy list ---- */
.value-list { display: flex; flex-direction: column; gap: 18px; }
.value-item {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 22px 24px;
}
.value-item .num {
  font-family: var(--font-heading);
  font-size: 22px;
  color: var(--color-secondary);
  flex-shrink: 0;
  width: 40px;
}
.value-item p { color: var(--color-text); font-size: 15px; line-height: 1.6; }
.value-item strong { color: var(--color-primary); }

/* ---- 8. Timeline (lich su) ---- */
.timeline { position: relative; padding-left: 32px; border-left: 2px solid var(--color-border); }
.timeline-item { position: relative; padding-bottom: 32px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: '';
  position: absolute;
  left: -38px; top: 4px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--color-secondary);
  border: 3px solid var(--color-bg);
  box-shadow: 0 0 0 2px var(--color-primary);
}
.timeline-item h4 { color: var(--color-primary); font-size: 17px; margin-bottom: 6px; }
.timeline-item p { color: var(--color-text-muted); font-size: 14.5px; }

/* ---- 9. Motto / quote banner ---- */
.motto-banner {
  text-align: center;
  padding: 48px 32px;
  border: 1px dashed rgba(255,255,255,0.4);
  border-radius: var(--radius-lg);
}
.motto-banner p { font-family: var(--font-heading); font-size: clamp(18px, 2.4vw, 26px); font-style: italic; line-height: 1.5; }

/* ---- 10. Gallery / event grid (SVG placeholders thay anh) ---- */
.event-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.event-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.event-media {
  height: 180px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  position: relative;
  overflow: hidden;
}
.event-media img { width: 100%; height: 100%; object-fit: cover; display: block; }
.event-body { padding: 22px 24px; }
.event-body h3 { color: var(--color-primary); font-size: 17.5px; margin-bottom: 8px; }
.event-body p { color: var(--color-text-muted); font-size: 14px; }
.event-tag {
  position: absolute; top: 14px; left: 14px;
  z-index: 2;
  background: rgba(0,0,0,0.35);
  border: 1px solid rgba(255,255,255,0.4);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 5px 10px;
  border-radius: 20px;
}

.activity-list { display: flex; flex-direction: column; gap: 14px; }
.activity-row {
  display: flex; gap: 16px; align-items: flex-start;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 18px 22px;
}
.activity-row .dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--color-secondary);
  margin-top: 7px; flex-shrink: 0;
}
.activity-row h4 { font-size: 15.5px; color: var(--color-primary); margin-bottom: 4px; }
.activity-row p { font-size: 14px; color: var(--color-text-muted); }

/* ---- 11. Press / bao chi ---- */
.press-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}
.press-pill {
  border: 1px solid var(--color-border);
  border-radius: 24px;
  padding: 10px 22px;
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-surface);
}

/* ---- 12. Testimonials ---- */
.testimonial-track { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.testimonial-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 32px;
  border: 1px solid var(--color-border);
  position: relative;
}
.testimonial-card::before {
  content: '\201C';
  font-family: var(--font-heading);
  font-size: 56px;
  color: var(--color-secondary-light);
  position: absolute;
  top: 8px; left: 20px;
  line-height: 1;
}
.testimonial-quote { font-style: italic; margin-bottom: 20px; color: var(--color-text); position: relative; z-index: 1; font-size: 14.5px; }
.testimonial-name { font-weight: 700; font-size: 14px; color: var(--color-primary); }
.testimonial-role { font-size: 12.5px; color: var(--color-text-muted); }

/* ---- 13. Admission / tuition ---- */
.fee-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px;
}
.fee-included { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px 24px; margin: 24px 0 32px; }
.fee-included li { display: flex; gap: 10px; align-items: flex-start; font-size: 14.5px; color: var(--color-text); }
.fee-included li::before { content: '✓'; color: var(--color-secondary); font-weight: 700; flex-shrink: 0; }
.fee-highlight {
  background: rgba(122, 31, 43, 0.06);
  border: 1px solid rgba(122, 31, 43, 0.18);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-bottom: 20px;
}
.fee-highlight .amount { font-family: var(--font-heading); font-size: 28px; color: var(--color-primary); }
.fee-note {
  background: var(--color-bg);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  font-size: 14px;
  color: var(--color-text-muted);
}
.fee-note strong { color: var(--color-primary); }

.admission-scope { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 8px; }
.scope-item { text-align: center; padding: 26px 18px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); }
.scope-item .ico { font-size: 26px; margin-bottom: 10px; }
.scope-item h4 { color: var(--color-primary); font-size: 15.5px; margin-bottom: 6px; }
.scope-item p { font-size: 13.5px; color: var(--color-text-muted); }

/* ---- 14. Contact ---- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; }
.contact-info-item { display: flex; gap: 16px; margin-bottom: 24px; }
.contact-info-item .ico {
  width: 40px; height: 40px; flex-shrink: 0;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
}
.map-embed {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  margin-top: 28px;
}
.map-embed iframe { width: 100%; height: 280px; border: 0; display: block; }

.form-field { margin-bottom: 18px; }
.form-row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-field label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.form-field input, .form-field textarea, .form-field select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 14px;
  background: var(--color-surface);
}
.form-field input:focus, .form-field textarea:focus, .form-field select:focus {
  outline: none;
  border-color: var(--color-secondary);
}

/* ---- 15. Footer ---- */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255,255,255,0.8);
  padding: 64px 0 32px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.site-footer h4 { color: #fff; font-size: 15px; margin-bottom: 16px; }
.site-footer a:hover { color: var(--color-secondary-light); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.15);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  font-size: 12.5px;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---- 16. Responsive ---- */
@media (max-width: 900px) {
  .nav { position: fixed; top: 84px; left: 0; right: 0; bottom: 0; background: var(--color-bg);
    flex-direction: column; justify-content: flex-start; align-items: flex-start; padding: 32px 24px; gap: 8px;
    transform: translateX(100%); transition: transform var(--transition); overflow-y: auto; }
  .nav.is-open { transform: translateX(0); }
  .nav-toggle { display: block; font-size: 22px; color: var(--color-primary); }
  .nav-item { width: 100%; }
  .nav-item > .nav-link { width: 100%; justify-content: space-between; padding: 14px 0; }
  .mega-dropdown {
    position: static; transform: none; opacity: 1; visibility: visible; box-shadow: none;
    border: none; padding: 0 0 0 14px; display: none; min-width: 0;
  }
  .nav-item.is-open .mega-dropdown { display: block; }
  .nav > a { padding: 14px 0; width: 100%; }
  .nav-cta { margin: 12px 0 0; }

  .hero .container { grid-template-columns: 1fr; }
  .hero-visual { order: -1; max-width: 220px; margin: 0 auto 12px; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .card-grid, .card-grid--2, .testimonial-track, .event-grid, .admission-scope, .fee-included { grid-template-columns: 1fr; }
  .form-row-2 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
}

/* ============================================================
   CHAT WIDGET - style dung chung, KHONG doi khi tao site moi
   ============================================================ */
.chat-launcher {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 60px; height: 60px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-strong);
  z-index: 200;
  font-size: 24px;
  transition: transform var(--transition);
}
.chat-launcher:hover { transform: scale(1.06); }

.chat-window {
  position: fixed;
  right: 24px;
  bottom: 96px;
  width: 360px;
  max-width: calc(100vw - 32px);
  height: 520px;
  max-height: calc(100vh - 140px);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-strong);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  z-index: 200;
  opacity: 0;
  transform: translateY(16px);
  pointer-events: none;
  transition: opacity var(--transition), transform var(--transition);
}
.chat-window.is-open { opacity: 1; transform: translateY(0); pointer-events: auto; }

.chat-header {
  background: var(--color-primary);
  color: #fff;
  padding: 16px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.chat-header-title { font-weight: 700; font-size: 14.5px; }
.chat-header-sub { font-size: 11.5px; color: rgba(255,255,255,0.7); }
.chat-close { color: #fff; font-size: 18px; }

.chat-body {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: var(--color-bg);
}
.chat-msg { max-width: 84%; padding: 10px 14px; border-radius: 14px; font-size: 13.5px; line-height: 1.5; }
.chat-msg--bot {
  align-self: flex-start;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-bottom-left-radius: 4px;
}
.chat-msg--user {
  align-self: flex-end;
  background: var(--color-secondary);
  color: #2a1e1c;
  border-bottom-right-radius: 4px;
}
.chat-msg--bot a {
  color: var(--color-primary);
  font-weight: 700;
  text-decoration: underline;
}
.chat-msg--typing { display: flex; gap: 4px; align-items: center; }
.chat-msg--typing span {
  width: 6px; height: 6px; border-radius: 50%; background: var(--color-text-muted);
  animation: chatTyping 1s infinite ease-in-out;
}
.chat-msg--typing span:nth-child(2) { animation-delay: 0.15s; }
.chat-msg--typing span:nth-child(3) { animation-delay: 0.3s; }
@keyframes chatTyping { 0%, 60%, 100% { opacity: 0.3; } 30% { opacity: 1; } }

.chat-quick-replies { display: flex; flex-wrap: wrap; gap: 8px; padding: 0 16px 12px; }
.chat-quick-replies button {
  font-size: 12px;
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 7px 12px;
  background: var(--color-surface);
  transition: border-color var(--transition), color var(--transition);
}
.chat-quick-replies button:hover { border-color: var(--color-secondary); color: var(--color-primary); }

.chat-quick-replies button.chat-quick-reply--contact {
  border-color: rgba(122, 31, 43, 0.4);
  color: var(--color-primary);
  background: rgba(122, 31, 43, 0.06);
  font-weight: 600;
}
.chat-quick-replies button.chat-quick-reply--contact:hover { border-color: var(--color-primary); }

.chat-contact-card {
  align-self: stretch;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 13.5px;
}
.chat-contact-card__title { font-weight: 700; color: var(--color-primary); font-size: 13.5px; line-height: 1.4; }
.chat-contact-card label { display: block; font-size: 12px; font-weight: 600; margin-bottom: 4px; color: var(--color-text-muted); }
.chat-contact-card input,
.chat-contact-card textarea {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 13px;
  font-family: inherit;
  background: var(--color-bg);
}
.chat-contact-card input:focus,
.chat-contact-card textarea:focus { outline: none; border-color: var(--color-secondary); }
.chat-contact-card textarea { resize: vertical; min-height: 44px; }
.chat-contact-card__actions { display: flex; gap: 8px; margin-top: 2px; }
.chat-contact-card__submit {
  flex: 1;
  background: var(--color-primary);
  color: #fff;
  border-radius: 20px;
  padding: 9px 14px;
  font-size: 13px;
  font-weight: 600;
  text-align: center;
}
.chat-contact-card__submit:disabled { opacity: 0.55; cursor: not-allowed; }
.chat-contact-card__cancel {
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 9px 14px;
  font-size: 13px;
  color: var(--color-text-muted);
}
.chat-contact-card__cancel:hover { border-color: var(--color-secondary); color: var(--color-primary); }
.chat-contact-card__error { color: #b3261e; font-size: 12px; }

.chat-input-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}
.chat-input-row input {
  flex: 1;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 10px 16px;
  font-size: 13.5px;
  font-family: inherit;
}
.chat-input-row input:focus { outline: none; border-color: var(--color-secondary); }
.chat-send {
  width: 38px; height: 38px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.chat-send:disabled { opacity: 0.5; cursor: not-allowed; }

/* ============================================================
   17. TRANG NOI BO (page-hero, program blocks, badges...)
   ============================================================ */
[id] { scroll-margin-top: 104px; }

.page-hero {
  position: relative;
  min-height: 42vh;
  display: flex;
  align-items: center;
  color: #fff;
  overflow: hidden;
  background: linear-gradient(150deg, var(--color-primary-dark) 0%, var(--color-primary) 60%, #8a2733 100%);
  padding-top: 84px;
}
.page-hero .container { position: relative; z-index: 2; max-width: 760px; }
.page-hero .eyebrow { color: var(--color-secondary-light); }
.page-hero h1 { font-size: clamp(28px, 4.4vw, 46px); color: #fff; margin-bottom: 14px; }
.page-hero p { color: rgba(255,255,255,0.88); font-size: 16px; max-width: 600px; }

.quality-badges { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.quality-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid rgba(255,255,255,0.35);
  background: rgba(255,255,255,0.08);
  color: #fff;
  font-size: 12.5px;
  font-weight: 600;
  padding: 7px 14px;
  border-radius: 20px;
}

.program-block {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px 40px;
  margin-bottom: 22px;
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 28px;
  align-items: flex-start;
}
.program-block .program-num {
  font-family: var(--font-heading);
  font-size: 34px;
  color: var(--color-secondary);
  border-right: 1px solid var(--color-border);
  padding-right: 20px;
}
.program-block h2 { color: var(--color-primary); font-size: 22px; margin-bottom: 10px; }
.program-block p { color: var(--color-text-muted); font-size: 15px; }
.program-block .program-tag {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-secondary);
  margin-bottom: 8px;
}
.program-block--media { grid-template-columns: 90px 1fr 200px; }
.program-media { border-radius: var(--radius-md); overflow: hidden; align-self: stretch; }
.program-media img { width: 100%; height: 100%; min-height: 150px; object-fit: cover; display: block; }
@media (max-width: 900px) {
  .program-block--media { grid-template-columns: 90px 1fr; }
  .program-media { grid-column: 1 / -1; margin-top: 18px; }
  .program-media img { height: 200px; }
}

/* Lich su hinh thanh - anh khai giang */
.history-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  margin-bottom: 32px;
}
.history-media img { width: 100%; height: 340px; object-fit: cover; display: block; }

/* Lien he - anh co so vat chat */
.contact-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  margin-top: 24px;
}
.contact-media img { width: 100%; height: 220px; object-fit: cover; display: block; }

.badge-grid { display: flex; flex-wrap: wrap; gap: 12px; }
.quality-pill {
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  border-radius: 22px;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

.lead-text { font-size: 16.5px; color: var(--color-text-muted); max-width: 780px; margin-bottom: 40px; }

.leader-card {
  display: flex;
  gap: 22px;
  align-items: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 26px 30px;
}
.leader-avatar {
  width: 76px; height: 76px; border-radius: 50%; flex-shrink: 0;
  background: linear-gradient(150deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-secondary-light); font-family: var(--font-heading); font-size: 22px; font-weight: 700;
}
.leader-card h3 { color: var(--color-primary); font-size: 17.5px; margin-bottom: 4px; }
.leader-card span { font-size: 13.5px; color: var(--color-text-muted); }

@media (max-width: 700px) {
  .program-block { grid-template-columns: 1fr; }
  .program-block .program-num { border-right: none; border-bottom: 1px solid var(--color-border); padding-right: 0; padding-bottom: 10px; }
}