:root{
    --paper:#F3EEE0;
    --paper-2:#EAE1CB;
    --ink:#232620;
    --ink-soft:#5B5E54;
    --teal-deep:#2E4A37;
    --teal:#5B9670;
    --teal-soft:#E2EFE1;
    --gold:#B4813B;
    --gold-soft:#EDE0C8;
    --white:#FFFFFF;
    --line:rgba(35,38,32,0.14);
    --radius-s:2px;
    --radius-m:6px;
    --shadow-card: 0 1px 0 rgba(35,38,32,0.06);
    color-scheme: light;
  }
  @media (prefers-color-scheme: dark){
    :root:not([data-theme="light"]){
      --paper:#181B17;
      --paper-2:#20241E;
      --ink:#EDE9DC;
      --ink-soft:#B7B6A9;
      --teal-deep:#16261B;
      --teal:#71AE84;
      --teal-soft:#20321F;
      --gold:#D3A15E;
      --gold-soft:#2A2417;
      --white:#20241E;
      --line:rgba(237,233,220,0.14);
      color-scheme: dark;
    }
  }
  :root[data-theme="dark"]{
    --paper:#181B17;
    --paper-2:#20241E;
    --ink:#EDE9DC;
    --ink-soft:#B7B6A9;
    --teal-deep:#16261B;
    --teal:#71AE84;
    --teal-soft:#20321F;
    --gold:#D3A15E;
    --gold-soft:#2A2417;
    --white:#20241E;
    --line:rgba(237,233,220,0.14);
    color-scheme: dark;
  }

  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--paper);
    color:var(--ink);
    font-family:'Inter',sans-serif;
    font-size:16px;
    line-height:1.65;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  .wrap{max-width:1180px;margin:0 auto;padding:0 28px;}
  h1,h2,h3,h4{
    font-family:'Cormorant Garamond',serif;
    font-weight:600;
    line-height:1.12;
    margin:0;
    color:var(--ink);
  }
  .eyebrow{
    font-family:'Inter',sans-serif;
    font-size:13px;
    font-weight:600;
    letter-spacing:.04em;
    color:var(--teal);
  }
  .lede{color:var(--ink-soft);font-size:17px;max-width:56ch;}
  section{padding:96px 0;}
  @media (max-width:720px){ section{padding:64px 0;} .wrap{padding:0 20px;} }
  /* !important: many views set section padding inline */
  main > section{padding-top:1rem !important;padding-bottom:2rem !important;}

  /* ---------- Nav ---------- */
  header.nav{
    /* block: Bootstrap's .nav makes this a flex row, which shrinks .mobile-menu to its content */
    display:block;
    position:sticky;top:0;z-index:50;
    background:color-mix(in srgb, var(--paper) 92%, transparent);
    backdrop-filter:blur(8px);
    border-bottom:1px solid var(--line);
  }
  .nav-inner{
    max-width:1180px;margin:0 auto;padding:16px 28px;
    display:flex;align-items:center;justify-content:space-between;gap:24px;
  }
  .brand{display:flex;align-items:center;gap:11px;}
  .brand svg{width:34px;height:34px;flex:none;}
  .brand-logo{width:34px;height:34px;flex:none;object-fit:contain;}
  .brand-name{font-family:'Cormorant Garamond',serif;font-size:22px;font-weight:600;letter-spacing:.01em;}
  .brand-name span{color:var(--teal);}
  nav.links{display:flex;align-items:center;gap:6px;}
  nav.links a{
    font-size:14px;font-weight:500;color:var(--ink-soft);
    padding:9px 12px;border-radius:999px;transition:background .15s, color .15s;
    white-space:nowrap;
  }
  nav.links a:hover{background:var(--teal-soft);color:var(--teal-deep);}
  nav.links a.active{background:var(--teal);color:#fff;}
  .nav-right{display:flex;align-items:center;gap:14px;}
  .nav-avatar{
    width:36px;height:36px;border-radius:50%;flex-shrink:0;
    display:inline-flex;align-items:center;justify-content:center;
    background:var(--teal);color:#fff;font-size:15px;font-weight:600;
    border:0;padding:0;cursor:pointer;user-select:none;
  }
  .nav-avatar:hover,.nav-avatar[aria-expanded="true"]{background:var(--teal-deep);}
  .nav-avatar:focus-visible{outline:2px solid var(--gold);outline-offset:2px;}
  .nav-user-menu{
    --bs-dropdown-bg:var(--paper);
    --bs-dropdown-color:var(--ink);
    --bs-dropdown-border-color:var(--line);
    --bs-dropdown-border-radius:var(--radius-m);
    --bs-dropdown-divider-bg:var(--line);
    --bs-dropdown-link-color:var(--ink);
    --bs-dropdown-link-hover-color:var(--teal-deep);
    --bs-dropdown-link-hover-bg:var(--teal-soft);
    --bs-dropdown-link-active-color:var(--teal-deep);
    --bs-dropdown-link-active-bg:var(--teal-soft);
    font-size:14px;min-width:200px;margin-top:8px !important;
  }
  .nav-user-name{font-weight:600;color:var(--ink-soft);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:260px;}
  .phone-pill{
    display:flex;align-items:center;gap:7px;font-size:14px;font-weight:600;color:var(--teal-deep);
  }
  .phone-pill svg{width:15px;height:15px;stroke:var(--teal);flex:none;}
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:11px 22px;border-radius:999px;font-size:14.5px;font-weight:600;
    border:1px solid transparent;cursor:pointer;transition:transform .15s, background .15s, border-color .15s;
    white-space:nowrap;
  }
  .btn-primary{background:var(--teal);color:#fff;}
  .btn-primary:hover{background:var(--teal-deep);}
  .btn-ghost{border-color:var(--line);color:var(--ink);background:transparent;}
  .btn-ghost:hover{border-color:var(--teal);color:var(--teal-deep);}
  .btn-gold{background:var(--gold);color:#fff;}
  .btn-gold:hover{background:#96682C;}
  .burger{display:none;background:none;border:none;padding:8px;cursor:pointer;}
  .burger span{display:block;width:22px;height:2px;background:var(--ink);margin:5px 0;}
  @media (max-width:1080px){
    nav.links{display:none;}
    .phone-pill{display:none;}
    .burger{display:block;}
    /* the burger menu carries Quản trị / Đăng xuất here, so the avatar is display-only */
    .nav-avatar{pointer-events:none;}
    .nav-user-menu{display:none !important;}
    .nav-login{display:none;}
  }
  .mobile-menu{display:none;flex-direction:column;padding:0 0 12px;border-top:1px solid var(--line);}
  .mobile-menu.open{display:flex;}
  .mobile-menu button{
    width:100%;text-align:left;background:none;border:0;color:inherit;cursor:pointer;
    padding:14px 20px;font-size:15px;font-weight:500;border-bottom:1px solid var(--line);
  }
  .mobile-menu button:hover{background:var(--teal-soft);color:var(--teal-deep);}
  .mobile-menu a{padding:14px 20px;font-size:15px;font-weight:500;border-bottom:1px solid var(--line);}
  .mobile-menu a:hover{background:var(--teal-soft);color:var(--teal-deep);}
  .mobile-menu a.active{color:var(--teal);font-weight:600;background:var(--teal-soft);}

  /* ---------- Home sub-nav (scroll spy) ---------- */
  .subnav{
    position:sticky;top:var(--header-h,66px);z-index:40;
    background:color-mix(in srgb, var(--paper) 92%, transparent);
    backdrop-filter:blur(8px);
    border-bottom:1px solid var(--line);
  }
  .subnav-inner{
    max-width:1180px;margin:0 auto;padding:8px 28px;
    display:flex;align-items:center;gap:6px;overflow-x:auto;
    scrollbar-width:none;
  }
  .subnav-inner::-webkit-scrollbar{display:none;}
  .subnav a{
    font-size:14px;font-weight:500;color:var(--ink-soft);
    padding:7px 14px;border-radius:999px;transition:background .15s, color .15s;
    white-space:nowrap;
  }
  .subnav a:hover{background:var(--teal-soft);color:var(--teal-deep);}
  .subnav a.active{background:var(--teal);color:#fff;}
  @media (max-width:720px){ .subnav-inner{padding:8px 20px;} }
  /* offset anchor jumps so section tops clear the sticky header + sub-nav */
  section[id]{scroll-margin-top:calc(var(--header-h,66px) + 60px);}

  /* ---------- Hero ---------- */
  .hero{padding:64px 0 90px;}
  .hero-grid{
    display:grid;grid-template-columns: 1fr 1.15fr;gap:56px;align-items:center;
  }
  @media (max-width:900px){ .hero-grid{grid-template-columns:1fr;} }
  .hero-visual{
    background:linear-gradient(160deg, var(--teal-deep), #375940 60%, var(--teal-deep));
    border-radius:var(--radius-m);
    aspect-ratio:4/5;
    position:relative;overflow:hidden;
    display:flex;align-items:center;justify-content:center;
  }
  .hero-visual svg{width:74%;height:74%;}
  .hero-visual::after{
    content:"";position:absolute;inset:0;
    background:radial-gradient(circle at 75% 12%, rgba(180,129,59,.22), transparent 45%);
  }
  .hero-copy h1{
    font-size:clamp(38px,5vw,60px);
    font-style:italic;font-weight:600;
    letter-spacing:-0.01em;
  }
  .hero-copy .eyebrow{display:block;margin-bottom:16px;}
  .hero-copy .lede{margin:22px 0 32px;font-size:18px;}
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px;}
  .hero-stats{display:flex;gap:36px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:26px;}
  .stat b{font-family:'Cormorant Garamond',serif;font-size:30px;font-weight:600;display:block;color:var(--teal-deep);}
  .stat span{font-size:13px;color:var(--ink-soft);}

  /* ---------- About ---------- */
  .about-grid{display:grid;grid-template-columns:0.9fr 1.1fr;gap:64px;align-items:start;}
  @media (max-width:860px){ .about-grid{grid-template-columns:1fr;gap:36px;} }
  .about-grid h2{font-size:clamp(30px,4vw,42px);font-style:italic;margin-bottom:20px;}
  .pillars{display:flex;flex-direction:column;gap:0;}
  .pillar{display:flex;gap:18px;padding:24px 0;border-top:1px solid var(--line);}
  .pillar:last-child{border-bottom:1px solid var(--line);}
  .pillar-num{font-family:'Cormorant Garamond',serif;font-style:italic;font-size:22px;color:var(--gold);flex:none;width:34px;}
  .pillar h3{font-size:19px;font-style:normal;font-weight:700;font-family:'Inter',sans-serif;margin-bottom:6px;}
  .pillar p{margin:0;color:var(--ink-soft);font-size:15px;}

  /* ---------- section head shared ---------- */
  .section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:44px;flex-wrap:wrap;padding:1rem;}
  .section-head h2{font-size:clamp(28px,3.6vw,38px);font-style:italic;max-width:20ch;}
  .section-head .lede{margin-top:10px;}

  /* ---------- Courses ---------- */
  .course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
  @media (max-width:860px){ .course-grid{grid-template-columns:1fr;} }
  .course-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-m);padding:34px 30px;display:flex;flex-direction:column;gap:14px;}
  .course-tag{font-size:12px;font-weight:600;letter-spacing:.03em;color:var(--teal);}
  .course-card h3{font-family:'Cormorant Garamond',serif;font-style:italic;font-size:25px;font-weight:600;}
  .course-card p{color:var(--ink-soft);font-size:14.5px;margin:0;flex:1;}
  .course-meta{display:flex;justify-content:space-between;font-size:13px;color:var(--ink-soft);border-top:1px solid var(--line);padding-top:14px;margin-top:4px;}
  .course-price{font-weight:700;color:var(--ink);}
  .course-card .btn{margin-top:6px;align-self:flex-start;}

  /* ---------- Experts ---------- */
  .expert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:34px;}
  @media (max-width:860px){ .expert-grid{grid-template-columns:1fr;} }
  .expert-card{display:flex;flex-direction:column;gap:16px;}
  .avatar{
    width:100%;aspect-ratio:1/1;border-radius:var(--radius-m);
    background:var(--teal-soft);
    display:flex;align-items:center;justify-content:center;
    font-family:'Cormorant Garamond',serif;font-style:italic;font-weight:600;font-size:56px;
    color:var(--teal-deep);
  }
  .avatar{overflow:hidden;}
  .avatar img{width:100%;height:100%;object-fit:cover;display:block;}
  .expert-card h3{font-size:20px;font-family:'Inter',sans-serif;font-weight:700;}
  .expert-role{font-size:13.5px;color:var(--teal);font-weight:600;margin-top:-10px;}
  .expert-card p{color:var(--ink-soft);font-size:14.5px;margin:0;}
  .expert-card h3,.expert-role,.expert-card p{padding:0 .5rem;}
  .expert-role{padding-top:.5rem;}
  .expert-card h3{padding-top:1.5rem;}

  /* ---------- Blog ---------- */
  .blog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:34px;}
  @media (max-width:860px){ .blog-grid{grid-template-columns:1fr;} }
  .blog-card{display:flex;flex-direction:column;gap:12px;}
  .blog-thumb{aspect-ratio:16/9;border-radius:var(--radius-m);background:linear-gradient(135deg,var(--teal-deep),var(--teal));position:relative;overflow:hidden;}
  .blog-thumb svg{position:absolute;inset:0;width:100%;height:100%;opacity:.9;}
  .blog-date{font-size:12.5px;color:var(--ink-soft);display:flex;align-items:center;gap:6px;}
  .blog-date svg{width:14px;height:14px;flex-shrink:0;fill:none;stroke:var(--teal);stroke-width:2;stroke-linecap:round;stroke-linejoin:round;}
  .blog-card h3{font-size:19px;font-family:'Inter',sans-serif;font-weight:700;line-height:1.35;}
  .blog-card p{margin:0;color:var(--ink-soft);font-size:14.5px;}
  .blog-card .read{font-size:13.5px;font-weight:600;color:var(--teal-deep);}
  /* same breakpoint as the nav burger toggle */
  @media (max-width:1080px){ .blog-date,.blog-card h3,.blog-card p,.blog-head{padding:0 1rem;} }

  /* ---------- Testimonials ---------- */
  .cam-nhan{background:var(--teal-deep);color:#F3EEE0;}
  .cam-nhan .eyebrow{color:var(--gold);}
  .cam-nhan h2{color:#F3EEE0;}
  .quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:rgba(255,255,255,0.14);margin-top:44px;border:1px solid rgba(255,255,255,0.14);}
  @media (max-width:860px){ .quote-grid{grid-template-columns:1fr;} }
  .quote-card{background:var(--teal-deep);padding:32px 28px;display:flex;flex-direction:column;gap:18px;}
  .quote-mark{font-family:'Cormorant Garamond',serif;font-size:44px;color:var(--gold);line-height:1;}
  .quote-card p{font-family:'Cormorant Garamond',serif;font-style:italic;font-size:19px;color:#F3EEE0;margin:0;line-height:1.5;}
  .quote-who{font-size:13.5px;color:#C7D6D3;}

  /* ---------- Contact / Booking ---------- */
  #lien-he{padding-bottom:1rem;}
  .contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start;}
  @media (max-width:900px){ .contact-grid{grid-template-columns:1fr;gap:44px;} }
  .contact-info h2{font-size:clamp(28px,3.6vw,38px);font-style:italic;margin-bottom:16px;}
  .info-row{display:flex;gap:16px;padding:18px 0;border-top:1px solid var(--line);}
  .info-row:last-of-type{border-bottom:1px solid var(--line);}
  .info-row svg{width:19px;height:19px;stroke:var(--teal);flex:none;margin-top:2px;}
  .info-row b{display:block;font-size:14.5px;margin-bottom:2px;}
  .info-row span{font-size:14px;color:var(--ink-soft);}
  .info-row span a{color:inherit;text-decoration:none;}
  .info-row span a:hover{text-decoration:underline;}
  .socials{display:flex;gap:10px;margin-top:24px;}
  .socials a{
    width:38px;height:38px;border-radius:50%;border:1px solid var(--line);
    display:flex;align-items:center;justify-content:center;
  }
  .socials a:hover{border-color:var(--teal);color:var(--teal);}
  .socials svg{width:16px;height:16px;}
  .socials img{width:16px;height:16px;object-fit:contain;}

  form.booking{background:var(--paper-2);padding:36px;border-radius:var(--radius-m);}
  form.booking h3{font-family:'Inter',sans-serif;font-weight:700;font-size:18px;margin-bottom:4px;}
  form.booking .sub{color:var(--ink-soft);font-size:14px;margin-bottom:22px;}
  .field{margin-bottom:16px;}
  .field label{display:block;font-size:13px;font-weight:600;margin-bottom:6px;}
  .field input, .field select, .field textarea{
    width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:var(--radius-s);
    background:var(--white);color:var(--ink);font-family:'Inter',sans-serif;font-size:14.5px;
  }
  .field input:focus, .field select:focus, .field textarea:focus{outline:2px solid var(--teal);outline-offset:1px;}
  .field-row{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
  @media (max-width:480px){ .field-row{grid-template-columns:1fr;} }

  /* Bootstrap has fw-bold but no text-bold; this is the form label style */
  .text-bold{display:block;font-weight:600;margin-bottom:6px;}
  form.booking .btn{width:100%;padding:13px;font-size:15px;margin-top:6px;}
  .form-note{font-size:12.5px;color:var(--ink-soft);margin-top:12px;}
  .form-success{display:none;font-size:14px;color:var(--teal-deep);font-weight:600;background:var(--teal-soft);padding:12px 14px;border-radius:var(--radius-s);margin-top:14px;}
  .form-success.show{display:block;}

  /* ---------- Footer ---------- */
  footer{border-top:1px solid var(--line);padding:0;}
  .footer-grid{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;}
  .footer-grid .brand-name{font-size:18px;}
  .footer-links{display:flex;gap:22px;flex-wrap:wrap;font-size:13.5px;color:var(--ink-soft);}
  .footer-contact{margin-top:28px;}
  .footer-contact .info-row{height:100%;border:none;padding:6px 0;}
  .foot-bottom{margin-top:24px;padding-top:20px;border-top:1px solid var(--line);font-size:12.5px;color:var(--ink-soft);display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;}
  .footer-disclaimer{margin-top:20px;font-size:12.5px;line-height:1.7;color:var(--ink-soft);font-style:italic;}

  @media (prefers-reduced-motion: reduce){ html{scroll-behavior:auto;} }

/* HTML from the admin WYSIWYG editor */
.rich-content { display: flow-root; }
.rich-content img { max-width: 100%; height: auto; }
.rich-content img[style*="float: left"] { margin: 0 16px 12px 0; }
.rich-content img[style*="float: right"] { margin: 0 0 12px 16px; }
@media (max-width: 600px) {
  .rich-content img[style*="float"] { float: none !important; display: block; margin: 12px auto; }
}

/* Course / blog detail pages */
.page-cover { display: block; width: 100%; aspect-ratio: 16 / 9; object-fit: cover; border-radius: var(--radius-m); margin-bottom: 32px; }
.course-actions { display: flex; justify-content: flex-end; margin-top: 24px; }
.course-facts { list-style: none; padding: 0; margin: 12px 0 20px; display: flex; flex-direction: column; gap: 8px; color: var(--ink-soft); }
.course-facts li { display: flex; align-items: center; gap: 8px; }
.course-facts svg { width: 18px; height: 18px; flex-shrink: 0; fill: none; stroke: var(--teal); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.expert-header { display: flex; align-items: center; gap: 24px; }
.expert-header .avatar { width: 140px; height: 140px; flex-shrink: 0; }
.expert-header h1 { margin: 0 0 8px; }
.expert-header .expert-role { display: block; margin-top: 0; }
@media (max-width: 600px) {
  .expert-header { flex-direction: column; align-items: flex-start; gap: 16px; }
}