:root {
  --bg: #fffaf1;
  --surface: #ffffff;
  --surface-alt: #f5f9ef;
  --surface-tint: #fff3da;
  --primary: #ef8f44;
  --primary-dark: #d77525;
  --secondary: #7bb38d;
  --secondary-dark: #568366;
  --text: #2d2a26;
  --muted: #6c665d;
  --line: rgba(45, 42, 38, 0.08);
  --shadow: 0 20px 50px rgba(90, 62, 26, 0.08);
  --radius: 26px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Be Vietnam Pro", sans-serif;
  background: linear-gradient(180deg, #fffdf8 0%, #fffaf1 100%);
  color: var(--text);
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
iframe { width: 100%; border: 0; }
main { overflow: hidden; }

.container { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.narrow { width: min(780px, 100%); }
.center { text-align: center; }
.section { padding: 72px 0; }
.page-main { padding-top: 24px; }
.soft-band { background: linear-gradient(180deg, #f7fbf2 0%, #fbfff8 100%); }
.tint-band { background: linear-gradient(180deg, #fff7e6 0%, #fffdf8 100%); }
.eyebrow {
  display: inline-block;
  margin-bottom: 12px;
  color: var(--secondary-dark);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.78rem;
}
.section-heading { margin-bottom: 28px; }
.section-heading h2, h1, h2, h3, h4 { font-family: "Quicksand", "Be Vietnam Pro", sans-serif; line-height: 1.15; margin: 0 0 14px; }
.section-heading.split, .gallery-page-head, .contact-strip, .nav-shell, .hero-grid, .two-col, .admin-topbar { display: flex; gap: 24px; align-items: center; justify-content: space-between; }
p, li, label, input, textarea, select, button { font: inherit; }
p { color: var(--muted); line-height: 1.8; margin: 0 0 16px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 50px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  cursor: pointer;
  transition: 0.2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 12px 24px rgba(239, 143, 68, 0.24); }
.btn-primary:hover { background: var(--primary-dark); }
.btn-soft { background: #fff; color: var(--text); border-color: rgba(255,255,255,0.6); }
.btn-outline { border-color: var(--line); background: #fff; }
.full { width: 100%; }
.text-link { color: var(--secondary-dark); font-weight: 700; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(14px);
  background: rgba(255, 250, 241, 0.88);
  border-bottom: 1px solid rgba(45, 42, 38, 0.06);
}
.nav-shell { min-height: 82px; }
.brand { display: flex; align-items: center; gap: 14px; max-width: 330px; }
.brand strong { display: block; font-size: 1rem; }
.brand small { display: block; color: var(--muted); margin-top: 4px; }
.brand-mark {
  width: 52px; height: 52px; border-radius: 18px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, #ffd970 0%, #f4a261 100%);
  color: #fff; font-weight: 800;
  box-shadow: 0 12px 24px rgba(244, 162, 97, 0.28);
  overflow: hidden;
}
.brand-mark img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.main-nav { display: flex; gap: 18px; align-items: center; }
.main-nav a { color: var(--muted); font-weight: 600; }
.main-nav a.active, .main-nav a:hover { color: var(--text); }
.nav-cta { padding: 12px 18px; border-radius: 999px; background: var(--secondary); color: #fff !important; }
.nav-toggle { display: none; background: transparent; border: 0; font-size: 1.6rem; }

.hero { padding: 56px 0 40px; position: relative; }
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(circle at top left, rgba(123, 179, 141, 0.16), transparent 32%),
    radial-gradient(circle at right center, rgba(255, 216, 112, 0.24), transparent 30%);
  pointer-events: none;
}
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; align-items: center; }
.hero-copy h1 { font-size: clamp(2.6rem, 5vw, 4.8rem); margin-bottom: 18px; }
.hero-copy p { font-size: 1.05rem; max-width: 620px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin: 28px 0; }
.hero-meta { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.hero-meta div, .floating-card, .stat-card {
  background: rgba(255,255,255,0.8);
  border: 1px solid rgba(255,255,255,0.6);
  box-shadow: var(--shadow);
  border-radius: var(--radius);
  padding: 18px;
}
.hero-meta strong { display: block; margin-bottom: 8px; }
.hero-media { position: relative; padding-left: 28px; }
.hero-media img { border-radius: 34px; aspect-ratio: 4 / 4.2; object-fit: cover; box-shadow: var(--shadow); }
.floating-card { position: absolute; left: 0; bottom: 28px; width: min(320px, 80%); }

.card, .auth-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
}
.card-grid { display: grid; gap: 22px; }
.thirds { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.halves { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.feature-card, .program-card, .testimonial-card, .post-card, .video-card { min-height: 100%; }
.testimonial-card .rating { color: #f0a317; font-size: 1.2rem; margin-bottom: 10px; }
.testimonial-card span { color: var(--muted); }
.gallery-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.gallery-card { position: relative; overflow: hidden; border-radius: 30px; min-height: 360px; box-shadow: var(--shadow); }
.gallery-card img { width: 100%; height: 100%; object-fit: cover; }
.gallery-overlay {
  position: absolute; inset: auto 0 0;
  padding: 24px;
  color: #fff;
  background: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.72) 100%);
}
.two-col { display: grid; grid-template-columns: 1fr 1fr; align-items: start; }
.stack-list { display: grid; gap: 18px; }
.soft-card { background: #fffef9; }
.cta-section { background: linear-gradient(135deg, #fff1d8 0%, #f3f8eb 100%); }
.contact-strip { align-items: stretch; }
.map-frame { overflow: hidden; border-radius: 30px; min-height: 320px; box-shadow: var(--shadow); }
.map-frame iframe { height: 100%; min-height: 320px; }
.map-frame.large iframe { min-height: 460px; }

.page-hero {
  padding: 54px 0 14px;
  background:
    radial-gradient(circle at left top, rgba(255, 216, 112, 0.18), transparent 32%),
    radial-gradient(circle at right 20%, rgba(123, 179, 141, 0.18), transparent 34%);
}
.page-hero h1 { font-size: clamp(2.1rem, 4vw, 3.6rem); }
.hero-shell,
.page-hero-shell {
  isolation: isolate;
}
.content-block ul, .content-block ol { color: var(--muted); line-height: 1.8; padding-left: 18px; }
.article-layout { display: grid; grid-template-columns: minmax(0, 2fr) 340px; gap: 28px; }
.article-image { width: 100%; border-radius: 28px; margin: 20px 0; }
.related-link { display: block; padding: 12px 0; border-bottom: 1px solid var(--line); color: var(--secondary-dark); font-weight: 600; }
.gallery-page-card { overflow: hidden; }
.gallery-page-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-top: 18px; }
.gallery-page-grid img { border-radius: 20px; aspect-ratio: 1 / 1; object-fit: cover; }
.video-embed { border-radius: 22px; overflow: hidden; background: #f3f4f6; }
.video-embed iframe, .video-embed img { width: 100%; aspect-ratio: 16 / 9; }
.video-fallback {
  display: grid;
  gap: 14px;
  padding: 18px;
}
.video-fallback p {
  margin: 0;
}
.sticky-card { position: sticky; top: 110px; }
.compact-grid { margin-top: 22px; }
.post-card img, .video-card img { width: 100%; border-radius: 22px; aspect-ratio: 16 / 10; object-fit: cover; margin-bottom: 16px; }
.card-meta { display: flex; gap: 12px; color: var(--muted); font-size: 0.92rem; margin-bottom: 12px; flex-wrap: wrap; }

.footer-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 28px; }
.site-footer { margin-top: 40px; padding: 50px 0 0; background: #fff7e7; border-top: 1px solid rgba(45, 42, 38, 0.06); }
.footer-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; color: var(--muted); }
.footer-bottom { margin-top: 28px; padding: 18px; text-align: center; color: var(--muted); border-top: 1px solid rgba(45, 42, 38, 0.06); }
.social-links { display: flex; gap: 12px; flex-wrap: wrap; }

.floating-actions {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 40;
  display: grid;
  gap: 12px;
}
.floating-action {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 52px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid rgba(45, 42, 38, 0.08);
  box-shadow: 0 16px 34px rgba(48, 39, 22, 0.14);
  background: rgba(255, 255, 255, 0.96);
  color: var(--text);
  font-weight: 700;
  cursor: pointer;
}
.floating-action-icon {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.26);
  font-size: 0.95rem;
  font-weight: 800;
}
.action-call {
  background: linear-gradient(135deg, #ef8f44 0%, #f3a557 100%);
  color: #fff;
}
.action-zalo {
  background: linear-gradient(135deg, #4ca7ff 0%, #2a7de1 100%);
  color: #fff;
}
.action-top {
  background: rgba(255, 255, 255, 0.96);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
}
.action-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

input, textarea, select {
  width: 100%;
  margin-top: 8px;
  border-radius: 16px;
  border: 1px solid rgba(45, 42, 38, 0.12);
  padding: 14px 16px;
  background: #fff;
}
textarea { resize: vertical; }
label { display: block; color: var(--text); font-weight: 600; margin-bottom: 14px; }
.checkbox { display: flex; align-items: center; gap: 10px; }
.checkbox input { width: auto; margin: 0; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.form-card { background: rgba(255,255,255,0.86); }

.flash-stack { padding-top: 18px; display: grid; gap: 10px; }
.flash {
  border-radius: 18px;
  padding: 14px 18px;
  border: 1px solid transparent;
}
.flash-success { background: #eef9ef; color: #2e6c3d; border-color: #ccebd1; }
.flash-error { background: #fff0ee; color: #a2463b; border-color: #f4c5be; }

.auth-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background: linear-gradient(135deg, #fff2d6 0%, #eef8f0 100%);
}
.auth-card { width: min(460px, 100%); }

.admin-body { background: #f8f6f1; }
.admin-layout { display: grid; grid-template-columns: 280px minmax(0, 1fr); min-height: 100vh; }
.admin-sidebar {
  background: linear-gradient(180deg, #fff4df 0%, #fffdf8 100%);
  border-right: 1px solid var(--line);
  padding: 24px;
  position: sticky;
  top: 0;
  height: 100vh;
}
.admin-brand { margin-bottom: 28px; }
.admin-nav { display: grid; gap: 10px; }
.admin-nav a {
  padding: 12px 14px;
  border-radius: 16px;
  color: var(--muted);
  font-weight: 600;
}
.admin-nav a.active, .admin-nav a:hover { background: #fff; color: var(--text); }
.admin-logout { margin-top: 18px; width: 100%; }
.admin-main { padding: 28px; }
.admin-topbar { margin-bottom: 22px; }
.admin-topbar p { margin-bottom: 0; }
.stats-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 16px; margin-bottom: 22px; }
.stat-card strong { display: block; font-size: 2rem; margin-bottom: 6px; }
.admin-form { display: grid; gap: 14px; }
.admin-action { margin-bottom: 18px; }
.admin-table { width: 100%; border-collapse: collapse; }
.admin-table th, .admin-table td { padding: 14px 12px; text-align: left; border-bottom: 1px solid var(--line); }
.table-wrap { overflow-x: auto; }
.actions { display: flex; gap: 14px; align-items: center; }
.actions form { margin: 0; }
.actions button, .actions a { background: none; border: 0; padding: 0; color: var(--secondary-dark); font-weight: 700; cursor: pointer; }
.admin-thumb { width: 80px; height: 80px; border-radius: 18px; object-fit: cover; }
.admin-thumb.wide { width: 180px; height: 110px; }
.admin-pre {
  padding: 14px 16px;
  border-radius: 16px;
  background: #fff7ea;
  border: 1px solid rgba(45, 42, 38, 0.08);
  overflow-x: auto;
}
.upload-list {
  display: grid;
  gap: 10px;
}
.upload-list code {
  display: block;
  padding: 10px 12px;
  border-radius: 12px;
  background: #faf7f0;
  border: 1px solid rgba(45, 42, 38, 0.06);
}
.wysiwyg-shell {
  border: 1px solid rgba(45, 42, 38, 0.12);
  border-radius: 20px;
  overflow: hidden;
  background: #fff;
}
.wysiwyg-toolbar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding: 12px;
  background: #fff7ea;
  border-bottom: 1px solid rgba(45, 42, 38, 0.08);
}
.wysiwyg-toolbar button {
  min-width: 40px;
  padding: 8px 12px;
  border-radius: 12px;
  border: 1px solid rgba(45, 42, 38, 0.1);
  background: #fff;
  cursor: pointer;
}
.wysiwyg-editor {
  min-height: 220px;
  padding: 16px;
  outline: 0;
  line-height: 1.8;
}
.wysiwyg-source {
  display: none;
}

@media (max-width: 980px) {
  .hero-grid, .two-col, .article-layout, .footer-grid, .admin-layout, .gallery-grid, .stats-grid, .thirds, .halves {
    grid-template-columns: 1fr;
  }
  .hero-media { padding-left: 0; }
  .floating-card { position: static; width: 100%; margin-top: 16px; }
  .main-nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 78px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    background: #fffaf2;
    padding: 18px;
    border-radius: 24px;
    box-shadow: var(--shadow);
  }
  .main-nav.is-open { display: flex; }
  .nav-toggle { display: block; }
  .admin-sidebar { position: relative; height: auto; }
  .sticky-card { position: static; }
}

@media (max-width: 720px) {
  .form-grid, .hero-meta, .gallery-page-grid { grid-template-columns: 1fr; }
  .section { padding: 56px 0; }
  .card, .auth-card { padding: 22px; }
  .page-main { padding-top: 12px; }
  .hero {
    padding: 30px 0 22px;
  }
  .page-hero {
    padding: 26px 0 10px;
  }
  .hero .container,
  .page-hero .container {
    width: min(1120px, calc(100% - 24px));
  }
  .hero-grid,
  .page-hero .container {
    padding: 22px 18px;
    border-radius: 28px;
    background: rgba(255, 255, 255, 0.62);
    box-shadow: 0 18px 38px rgba(86, 74, 49, 0.08);
    backdrop-filter: blur(8px);
  }
  .hero-copy h1,
  .page-hero h1 {
    font-size: clamp(1.95rem, 8vw, 2.6rem);
  }
  .hero-copy p,
  .page-hero p {
    font-size: 0.98rem;
  }
  .floating-actions {
    right: 12px;
    bottom: 12px;
    gap: 10px;
  }
  .floating-action {
    min-height: 48px;
    padding: 0 14px;
    font-size: 0.92rem;
  }
  .floating-action-icon {
    width: 28px;
    height: 28px;
  }
}