/* ==========================================================================
   NGỌT — Flatsome child · phong cách theo guide NGỌT
   Mực Đen · Kem · Gold · Xanh Thép — Playfair Display / Be Vietnam Pro / DM Mono
   Mọi class có tiền tố .dca- để không đụng CSS của Flatsome / Tutor.
   ========================================================================== */
:root{
  --ink:#0A0A0A;
  --cream:#F5F0E8;
  --gold:#C9A84C;
  --gold-light:#E8C96A;
  --gold-dark:#8C6D2A;
  --warm-gray:#8A7F74;
  --steel:#3A4A5C;
  --steel-light:#6E8698;
  --forest:#2A4A3A;
  --rust:#A8756A;
  --surface:#12151A;
  --surface-2:#1A1F26;
  --line:rgba(201,168,76,.18);
  --line-soft:rgba(245,240,232,.10);
  --display:'Playfair Display',Georgia,serif;
  --body:'Be Vietnam Pro',system-ui,sans-serif;
  --mono:'DM Mono',ui-monospace,monospace;
  --radius:2px;
  --header-h:64px;
}

html{scroll-behavior:smooth;scroll-padding-top:90px}
html.dca-lock{overflow:hidden}
body.dca-site{
  background:var(--ink);color:var(--cream);
  font-family:var(--body);font-size:15px;line-height:1.65;
  overflow-x:clip;-webkit-font-smoothing:antialiased;
}
/* Flatsome đặt overflow-x:hidden cho cả html lẫn body → body thành khung cuộn, position:sticky không chạy.
   clip chặn tràn ngang mà không tạo khung cuộn. */
html:has(body.dca-site){overflow-x:clip}
body.dca-site #wrapper,body.dca-site #main{background:var(--ink)}
body.dca-site ::selection{background:var(--gold);color:var(--ink)}
body.dca-site a{color:var(--gold)}
body.dca-site a:hover{color:var(--gold-light)}
body.dca-site h1,body.dca-site h2,body.dca-site h3,body.dca-site h4,body.dca-site h5,body.dca-site h6{color:var(--cream);font-family:var(--display);font-weight:700}

/* Reset nhẹ cho mọi khối DCA (Flatsome đặt margin cho p/h/li/button) */
/* :where(khung) + :is(thẻ) = độ ưu tiên (0,0,1): thắng reset của Flatsome nhờ nạp sau, nhưng thua mọi class .dca-* */
:where(.dca,[class^="dca-"]) :is(p,h1,h2,h3,h4,h5,h6,ul,ol,li,figure){margin:0;padding:0}
:where(.dca,[class^="dca-"]) :is(ul,ol){list-style:none}
:where(.dca) :where(b,strong){font-weight:600}
:where(.dca) img{display:block;max-width:100%}
/* Flatsome đặt margin/chữ in hoa/đậm cho button; :where() để style riêng của từng nút luôn thắng */
:where(.dca,[class^="dca-"]) button,button:where([class^="dca-"]){
  -webkit-appearance:none;appearance:none;margin:0;min-height:0;line-height:normal;text-shadow:none;
  font-weight:400;letter-spacing:normal;text-transform:none;max-width:none;box-shadow:none;
}

/* ═══ CHỮ & NÚT DÙNG CHUNG ═══ */
.dca-tag{font-family:var(--mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;line-height:1.65;
  color:var(--gold);margin-bottom:14px;display:flex;align-items:center;gap:12px}
.dca-tag::after{content:'';flex:1;max-width:64px;height:1px;background:rgba(201,168,76,.4)}
.dca-tag.is-steel{color:var(--steel-light)}
.dca-tag.is-steel::after{background:rgba(110,134,152,.4)}
.dca .dca-h1,.dca-h1{font-family:var(--display);font-size:clamp(36px,5vw,64px);line-height:1.1;color:var(--cream);font-weight:700;margin:0 0 22px}
.dca .dca-h2,.dca-h2{font-family:var(--display);font-size:clamp(26px,3.2vw,42px);line-height:1.18;color:var(--cream);font-weight:700;margin:0}
.dca .dca-h3,.dca-h3{font-family:var(--display);font-size:clamp(21px,2.4vw,30px);line-height:1.28;color:var(--cream);font-weight:700;margin:0}
.dca-h1 em,.dca-h2 em,.dca-h3 em{color:var(--gold);font-style:italic}
.dca-h2 u,.dca-h3 u{color:var(--steel-light);text-decoration:none;font-style:italic}
.dca-muted{color:var(--warm-gray)}

.dca-btn,body.dca-site a.dca-btn{font-family:var(--mono);font-size:11px;font-weight:400;letter-spacing:.14em;text-transform:uppercase;line-height:1.5;
  padding:13px 22px;border-radius:var(--radius);text-decoration:none;cursor:pointer;border:1px solid var(--gold);
  background:var(--gold);color:var(--ink);transition:.22s;display:inline-flex;align-items:center;justify-content:center;gap:8px;margin:0;white-space:nowrap}
.dca-btn:hover,body.dca-site a.dca-btn:hover{background:var(--gold-light);border-color:var(--gold-light);transform:translateY(-2px);color:var(--ink)}
.dca-btn:disabled{opacity:.45;cursor:not-allowed;transform:none}
.dca-btn i{font-size:14px;line-height:1}
.dca-btn.is-sm,body.dca-site a.dca-btn.is-sm{padding:9px 14px;font-size:10px}
.dca-btn.is-block{width:100%}
.dca-btn.is-ghost,body.dca-site a.dca-btn.is-ghost{background:transparent;color:var(--gold)}
.dca-btn.is-ghost:hover,body.dca-site a.dca-btn.is-ghost:hover{background:rgba(201,168,76,.12);color:var(--gold)}
.dca-btn.is-steel,body.dca-site a.dca-btn.is-steel{background:transparent;border-color:var(--steel-light);color:var(--steel-light)}
.dca-btn.is-steel:hover,body.dca-site a.dca-btn.is-steel:hover{background:rgba(110,134,152,.14);color:var(--cream)}
.dca-btn.is-ink,body.dca-site a.dca-btn.is-ink{background:var(--ink);border-color:var(--ink);color:var(--gold)}
.dca-btn.is-ink:hover,body.dca-site a.dca-btn.is-ink:hover{background:#1c1c1c;border-color:#1c1c1c;color:var(--gold-light)}
.dca-btn.is-ink-ghost,body.dca-site a.dca-btn.is-ink-ghost{background:transparent;border-color:rgba(10,10,10,.55);color:var(--ink)}
.dca-btn.is-ink-ghost:hover,body.dca-site a.dca-btn.is-ink-ghost:hover{background:rgba(10,10,10,.08);color:var(--ink)}
.dca-btn-row{display:flex}
.dca-btn-row.is-center{justify-content:center}
.dca-btn-row.is-right{justify-content:flex-end}

.dca-chip{font-family:var(--mono);font-size:9px;letter-spacing:.14em;text-transform:uppercase;line-height:1.4;
  padding:5px 9px;border-radius:var(--radius);background:rgba(10,10,10,.78);color:var(--gold);border:1px solid var(--line);
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}
.dca-meta{display:flex;flex-wrap:wrap;gap:6px 14px;font-family:var(--mono);font-size:10.5px;letter-spacing:.06em;color:var(--warm-gray);line-height:1.5}
.dca-meta span{display:inline-flex;align-items:center;gap:5px}
.dca-meta i{font-size:12px;color:var(--steel-light)}
.dca-meta .ri-star-fill{color:var(--gold)}
.dca-noimg{display:flex;align-items:center;justify-content:center;width:100%;height:100%;
  font-family:var(--display);font-size:34px;font-weight:700;color:rgba(201,168,76,.4);background:var(--surface-2)}
.dca-noimg svg{width:22%;max-width:90px;height:auto;color:rgba(201,168,76,.35)}
.dca-empty{color:var(--warm-gray);padding:36px;border:1px dashed var(--line-soft);text-align:center;font-size:14px}

/* ═══ BỐ CỤC ═══ */
.dca-wrap{max-width:1240px;margin:0 auto;padding:0 clamp(16px,4vw,40px);position:relative}
.dca-wrap.is-full{max-width:none}
.dca-sec{padding:clamp(56px,8vw,96px) 0;position:relative}
.dca-sec.is-pad-tight{padding:clamp(32px,4.5vw,52px) 0}
.dca-sec.is-pad-none{padding:0}
.dca-sec.is-bg-surface{background:var(--surface)}
.dca-sec.is-bg-steel{background:var(--steel)}
.dca-sec.has-rule::before{content:'';position:absolute;top:0;left:50%;transform:translateX(-50%);height:1px;width:min(1120px,92%);
  background:linear-gradient(90deg,transparent,var(--line) 25%,var(--line) 75%,transparent)}
.dca-sec.is-bg-steel .dca-tag{color:var(--gold)}
.dca-sec.is-bg-steel .dca-head-desc,.dca-sec.is-bg-steel .dca-muted{color:rgba(245,240,232,.72)}

.dca-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(var(--min,260px),100%),1fr));gap:var(--gap,18px)}
.dca-grid.is-fixed{grid-template-columns:repeat(var(--cols,2),minmax(0,1fr))}
.dca-grid>*{min-width:0}

.dca-head{display:flex;align-items:flex-end;justify-content:space-between;gap:18px 32px;flex-wrap:wrap}
.dca-head-main{max-width:720px}
.dca-head.is-center{flex-direction:column;align-items:center;text-align:center}
.dca-head.is-center .dca-head-main{margin:0 auto}
.dca-head.is-center .dca-tag{justify-content:center}
.dca-head.is-center .dca-tag::before{content:'';flex:1;max-width:64px;height:1px;background:rgba(201,168,76,.4)}
.dca-head.is-center .dca-tag.is-steel::before{background:rgba(110,134,152,.4)}
.dca-head-desc{color:var(--warm-gray);font-size:15.5px;margin-top:14px!important;max-width:620px;line-height:1.65}
.dca-head.is-center .dca-head-desc{margin-left:auto!important;margin-right:auto!important}
.dca-head-desc b{color:var(--cream)}
.dca-head-link,body.dca-site a.dca-head-link{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--gold);
  display:inline-flex;align-items:center;gap:8px;padding-bottom:4px;border-bottom:1px solid var(--line);white-space:nowrap;text-decoration:none}
.dca-head-link:hover{border-color:var(--gold)}
.dca-head-link i{transition:transform .2s}
.dca-head-link:hover i{transform:translateX(3px)}

/* ═══ FLATSOME · HEADER ═══ */
body.dca-site .header-wrapper,body.dca-site .header-main,body.dca-site .header-bg-color{background:rgba(10,10,10,.94)!important}
body.dca-site .header-bg-container{-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}
body.dca-site .header-main{border-bottom:1px solid var(--line)}
body.dca-site .header-shadow .header-wrapper,body.dca-site .header-wrapper.stuck{box-shadow:none}
body.dca-site .header-main .header-inner,body.dca-site .header-bottom .flex-row{padding:0 clamp(16px,4vw,40px)}
body.dca-site #logo{width:auto!important;margin-right:18px}
body.dca-site .header-main .flex-left{flex:1;min-width:0}
body.dca-site .header-main .nav-left{width:100%;flex-wrap:nowrap}
body.dca-site .header-main li.html_top_right_text{flex:1;min-width:0;display:flex;align-items:center;gap:10px;margin:0}
body.dca-site .header-main li.html_nav_position_text_top{display:flex;align-items:center;gap:10px;margin:0}
body.dca-site .header-nav li.html{padding:0}

.dca-brand,body.dca-site a.dca-brand{display:flex;align-items:center;gap:11px;color:var(--cream);text-decoration:none;line-height:1}
.dca-brand:hover{color:var(--cream)}
.dca-brand-mark{display:block;width:30px;height:auto;color:var(--gold);flex-shrink:0}
.dca-f-brand .dca-brand-mark{width:44px}
.dca-brand-txt b{display:block;font-family:var(--display);font-size:17px;color:var(--cream);font-weight:700;letter-spacing:.04em;line-height:1.25}
.dca-brand-txt>span{font-family:var(--mono);font-weight:400;font-size:8.5px;letter-spacing:.18em;color:var(--warm-gray);text-transform:uppercase;display:block;margin-top:2px;line-height:1.4}

/* Top bar: dòng khuyến mãi */
body.dca-site #top-bar,body.dca-site .header-top{background:var(--steel)!important;min-height:0}
body.dca-site .header-top .flex-row{min-height:34px}
html.dca-promo-off body.dca-site #top-bar{display:none}
.dca-promo{display:flex;align-items:center;justify-content:center;gap:14px;font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--cream);line-height:1.5}
.dca-promo b{color:var(--gold);font-weight:500}
.dca-promo-x{border:0;background:none;color:rgba(245,240,232,.7);cursor:pointer;font-size:11px;padding:4px 6px}
.dca-promo-x:hover{color:var(--gold)}
body.dca-site .header-top .html_topbar_left{margin:0 auto}

/* Menu chính (dòng dưới) */
body.dca-site .header-bottom{background:var(--ink)!important;border-bottom:1px solid var(--line-soft);min-height:0}
body.dca-site .header-bottom .flex-row{min-height:42px}
body.dca-site .header-bottom-nav>li,body.dca-site .header-nav-main>li{margin:0 2px!important}
body.dca-site .header-bottom-nav>li>a,body.dca-site .header-nav-main>li>a{
  font-family:var(--mono);font-size:10.5px;font-weight:400;letter-spacing:.14em;text-transform:uppercase;
  color:var(--warm-gray);padding:6px 10px!important;border-radius:var(--radius);line-height:1.5;transition:.2s;min-height:0}
body.dca-site .header-bottom-nav>li>a:hover,body.dca-site .header-nav-main>li>a:hover{color:var(--cream);background:rgba(245,240,232,.05)}
body.dca-site .header-bottom-nav>li.active>a,body.dca-site .header-bottom-nav>li.current-menu-item>a{color:var(--gold)}
body.dca-site .nav-dropdown{background:var(--surface)!important;border:1px solid var(--line)!important;border-radius:var(--radius);box-shadow:0 18px 40px rgba(0,0,0,.5)}
body.dca-site .nav-dropdown>li>a{color:var(--warm-gray)!important;font-size:13px}
body.dca-site .nav-dropdown>li>a:hover{color:var(--gold)!important}
body.dca-site .nav-dropdown-default .nav-column li>a,body.dca-site .nav-dropdown.nav-dropdown-default>li>a{border-color:var(--line-soft)}

/* Nút Danh mục + dropdown */
.dca-cats{position:relative;flex-shrink:0}
.dca-cats-btn{font-weight:400;display:inline-flex;align-items:center;gap:8px;height:38px;padding:0 14px!important;border:1px solid var(--line)!important;border-radius:var(--radius);
  background:transparent;color:var(--cream);font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;cursor:pointer;transition:.2s}
.dca-cats-btn i{color:var(--gold);font-size:15px}
.dca-cats-btn:hover,.dca-cats.is-open .dca-cats-btn{border-color:var(--gold)!important;background:rgba(201,168,76,.08)}
.dca-cats-menu{position:absolute;top:calc(100% + 10px);left:0;min-width:280px;max-height:70vh;overflow:auto;padding:8px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 20px 44px rgba(0,0,0,.55);
  opacity:0;visibility:hidden;transform:translateY(6px);transition:.2s;z-index:100}
.dca-cats-menu::before{content:'';position:absolute;left:0;right:0;top:-12px;height:12px}
.dca-cats:hover .dca-cats-menu,.dca-cats.is-open .dca-cats-menu,.dca-cats:focus-within .dca-cats-menu{opacity:1;visibility:visible;transform:none}
.dca-cats-menu a,body.dca-site .dca-cats-menu a{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 12px;
  color:var(--cream);font-size:13.5px;text-decoration:none;border-radius:var(--radius);line-height:1.4;text-transform:none;letter-spacing:0}
.dca-cats-menu a:hover{background:rgba(201,168,76,.08);color:var(--gold)}
.dca-cats-menu small{font-family:var(--mono);font-size:10px;color:var(--warm-gray)}
.dca-cats-menu a.is-all{margin-top:6px;border-top:1px solid var(--line-soft);border-radius:0;padding-top:12px;
  font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--gold);justify-content:flex-start}

/* Ô tìm khóa học */
.dca-search{flex:1;min-width:0;max-width:560px;display:flex;align-items:center;height:38px;margin:0;position:relative;
  border:1px solid var(--line-soft);background:var(--surface);border-radius:var(--radius);transition:.2s}
.dca-search:focus-within{border-color:var(--gold)}
.dca-search>i{position:absolute;left:12px;color:var(--warm-gray);font-size:15px;pointer-events:none}
.dca-search input[type=search]{flex:1;min-width:0;height:100%;margin:0;border:0!important;background:transparent!important;box-shadow:none!important;
  padding:0 10px 0 36px;color:var(--cream);font-family:var(--body);font-size:13.5px}
.dca-search input::placeholder{color:var(--warm-gray);opacity:1}
.dca-search button{height:calc(100% - 8px);margin:0 4px!important;padding:0 14px!important;border:0;border-radius:var(--radius);
  background:var(--gold);color:var(--ink);font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;cursor:pointer}
.dca-search button:hover{background:var(--gold-light)}

/* Giỏ hàng + tài khoản */
.dca-cart,body.dca-site a.dca-cart{position:relative;display:inline-flex;align-items:center;gap:8px;height:38px;padding:0 10px;color:var(--cream);
  font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;text-decoration:none}
.dca-cart i{font-size:18px;color:var(--gold)}
.dca-cart:hover{color:var(--gold)}
.dca-cart-n{min-width:18px;height:18px;padding:0 5px;border-radius:9px;background:var(--gold);color:var(--ink);font-size:10px;letter-spacing:0;
  display:inline-flex;align-items:center;justify-content:center;line-height:1}
.dca-cart-n.is-empty{display:none}
.dca-acc{display:flex;align-items:center;gap:10px;position:relative}
.dca-acc-login,body.dca-site a.dca-acc-login,.dca-acc-learn,body.dca-site a.dca-acc-learn{display:inline-flex;align-items:center;gap:7px;color:var(--cream);text-decoration:none;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;white-space:nowrap;padding:8px 4px}
.dca-acc-login i{color:var(--gold);font-size:16px}
.dca-acc-login:hover,.dca-acc-learn:hover{color:var(--gold)}
.dca-acc-btn{display:inline-flex;align-items:center;gap:8px;padding:3px 8px 3px 3px!important;border:1px solid var(--line-soft)!important;border-radius:var(--radius);
  background:transparent;color:var(--cream);cursor:pointer;font-family:var(--body);font-size:13px}
.dca-acc-btn img{width:30px;height:30px;border-radius:var(--radius);object-fit:cover}
.dca-acc-btn:hover,.dca-acc.is-open .dca-acc-btn{border-color:var(--gold)!important}
.dca-acc-name{max-width:130px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.dca-acc-panel{position:absolute;right:0;top:calc(100% + 10px);width:270px;padding:8px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);box-shadow:0 20px 44px rgba(0,0,0,.55);opacity:0;visibility:hidden;transform:translateY(6px);transition:.2s;z-index:100}
.dca-acc.is-open .dca-acc-panel{opacity:1;visibility:visible;transform:none}
.dca-acc-head{display:flex;align-items:center;gap:12px;padding:10px 10px 14px;border-bottom:1px solid var(--line-soft)}
.dca-acc-head img{width:42px;height:42px;border-radius:var(--radius);object-fit:cover}
.dca-acc-head b{display:block;color:var(--cream);font-size:14px;line-height:1.3}
.dca-acc-head small{display:block;color:var(--warm-gray);font-size:11.5px;overflow:hidden;text-overflow:ellipsis;max-width:180px}
.dca-acc-group{padding:6px 0;border-bottom:1px solid var(--line-soft)}
.dca-acc-group:last-child{border-bottom:0}
.dca-acc-group a,body.dca-site .dca-acc-group a{display:flex;align-items:center;gap:10px;padding:9px 10px;color:var(--cream);font-size:13.5px;text-decoration:none;border-radius:var(--radius);line-height:1.4}
.dca-acc-group a i{color:var(--steel-light);font-size:16px}
.dca-acc-group a:hover{background:rgba(201,168,76,.08);color:var(--gold)}
.dca-acc-group a:hover i{color:var(--gold)}
.dca-acc-group a.is-logout,.dca-acc-group a.is-logout i{color:var(--rust)}

/* Off-canvas mobile menu (Flatsome) */
body.dca-site .off-canvas .mfp-content,body.dca-site .off-canvas-left .mfp-content,body.dca-site .off-canvas-right .mfp-content{background:rgba(10,10,10,.99)!important}
body.dca-site .mobile-sidebar .nav-sidebar>li>a{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--warm-gray)}
body.dca-site .mobile-sidebar .nav-sidebar>li>a:hover{color:var(--gold)}
body.dca-site .mobile-sidebar .nav-sidebar>li{border-color:var(--line-soft)}
body.dca-site .mobile-sidebar li.html{padding:14px 20px}
body.dca-site .mobile-sidebar .dca-search{max-width:none}
body.dca-site .header-main .nav-icon>a{color:var(--gold)}
body.dca-site .header-main .nav-icon>a:hover{color:var(--gold-light)}

/* ═══ HERO ═══ */
.dca-sec:has(.dca-hero){overflow:hidden}
.dca-hero{position:relative;padding:clamp(40px,6vw,76px) 0 clamp(52px,7vw,90px)}
.dca-hero::before{content:'';position:absolute;top:0;bottom:0;left:calc(50% - 50vw);right:calc(50% - 50vw);pointer-events:none;
  background:radial-gradient(ellipse 45% 45% at 78% 40%,rgba(201,168,76,.10) 0,transparent 70%),
             radial-gradient(ellipse 40% 55% at 6% 90%,rgba(58,74,92,.30) 0,transparent 65%)}
.dca-hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(30px,5vw,70px);align-items:center;position:relative}
.dca-hero.is-solo .dca-hero-grid{grid-template-columns:1fr;max-width:820px}
.dca-hero-tag{font-family:var(--mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--gold);
  margin-bottom:22px;display:flex;align-items:center;gap:12px;line-height:1.65}
.dca-hero-tag::before{content:'';width:34px;height:1px;background:var(--gold);flex-shrink:0}
.dca-hero-tag i{display:none}
.dca-hero-sub{color:var(--warm-gray);font-size:16px;line-height:1.75;max-width:520px;margin-bottom:22px!important}
.dca-hero-sub b{color:var(--cream)}
.dca-hero-hl{display:grid;gap:8px;margin-bottom:30px!important}
.dca-hero-hl li{position:relative;padding-left:24px!important;font-size:14.5px;color:var(--cream);line-height:1.6}
.dca-hero-hl li::before{content:'✓';position:absolute;left:0;top:0;color:var(--gold)}
.dca-hero-cta{display:flex;flex-wrap:wrap;gap:12px}
.dca-hero-stats{display:flex;flex-wrap:wrap;gap:0;margin-top:40px;border-top:1px solid var(--line-soft);padding-top:22px}
.dca-hero-stats>div{flex:1 1 120px;padding-right:18px;margin-right:18px;border-right:1px solid var(--line-soft)}
.dca-hero-stats>div:last-child{border-right:0;margin-right:0}
.dca-hero-stats b{display:block;font-family:var(--display);font-size:clamp(24px,2.6vw,32px);font-weight:700;color:var(--gold);line-height:1.15}
.dca-hero-stats span{display:block;font-family:var(--mono);font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--warm-gray);margin-top:6px;line-height:1.5}

.dca-hero-show{position:relative}
.dca-frame{position:relative;border:1px solid var(--line);background:var(--surface);padding:14px}
.dca-frame::before,.dca-frame::after{content:'';position:absolute;width:16px;height:16px;border:1px solid var(--gold);z-index:2}
.dca-frame::before{top:-1px;left:-1px;border-right:0;border-bottom:0}
.dca-frame::after{bottom:-1px;right:-1px;border-left:0;border-top:0}
.dca-frame>img{width:100%;height:auto;display:block}
.dca-frame-cap{margin-top:14px;text-align:center;font-family:var(--mono);font-size:9.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--warm-gray)}

.dca-carousel{position:relative}
.dca-carousel-track{display:grid}
.dca-slide{grid-area:1/1;opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .45s,transform .45s,visibility .45s}
.dca-slide.is-on{opacity:1;visibility:visible;transform:none}
.dca-slide-img{display:block;position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--surface-2)}
.dca-slide-img img{width:100%;height:100%;object-fit:cover;transition:transform .6s}
.dca-slide-img:hover img{transform:scale(1.03)}
.dca-slide-img .dca-chip{position:absolute;top:12px;left:12px}
.dca-slide-body{padding:18px 4px 4px}
.dca .dca-slide-body h3{font-family:var(--display);font-size:clamp(18px,1.8vw,22px);line-height:1.32;font-weight:700;margin-bottom:10px}
.dca-slide-body h3 a,body.dca-site .dca-slide-body h3 a{color:var(--cream);text-decoration:none}
.dca-slide-body h3 a:hover{color:var(--gold)}
.dca-slide-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:16px;padding-top:14px;border-top:1px solid var(--line-soft)}
.dca-slide-price{display:flex;align-items:baseline;gap:8px}
.dca-slide-price b{font-family:var(--display);font-size:22px;color:var(--gold);font-weight:700}
.dca-slide-price small{font-family:var(--mono);font-size:10px;color:var(--steel-light)}
.dca-dots{display:flex;gap:6px;justify-content:center;margin-top:16px}
.dca-dots button{width:22px;height:3px;padding:0!important;border:0;border-radius:2px;background:rgba(245,240,232,.18);cursor:pointer;transition:.25s}
.dca-dots button.is-on{width:36px;background:var(--gold)}

/* ═══ CARD KHÓA HỌC ═══ */
.dca-courses{display:grid;grid-template-columns:repeat(var(--cols,4),minmax(0,1fr));gap:18px}
.dca-course{display:flex;flex-direction:column;border:1px solid var(--line-soft);background:var(--surface);border-radius:var(--radius);
  overflow:hidden;transition:transform .22s,border-color .22s;min-width:0;height:100%}
.dca-course:hover{transform:translateY(-4px);border-color:var(--line)}
.dca-course-img{position:relative;display:block;aspect-ratio:16/9;overflow:hidden;background:var(--surface-2)}
.dca-course-img img{width:100%;height:100%;object-fit:cover;transition:transform .6s}
.dca-course:hover .dca-course-img img{transform:scale(1.04)}
.dca-course-img .dca-chip{position:absolute;top:10px;left:10px;max-width:calc(100% - 20px);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.dca-course-body{display:flex;flex-direction:column;gap:8px;padding:16px 16px 18px;flex:1}
.dca .dca-course-t,.dca-course-t{font-family:var(--body);font-size:15px;font-weight:600;line-height:1.45;margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:2.9em}
.dca-course-t a,body.dca-site .dca-course-t a{color:var(--cream);text-decoration:none}
.dca-course-t a:hover{color:var(--gold)}
.dca-course-by{font-size:12.5px;color:var(--warm-gray);margin:0;line-height:1.4}
.dca-course .dca-price{margin-top:auto;padding-top:12px;border-top:1px solid var(--line-soft)}

.dca-price{display:flex;align-items:baseline;flex-wrap:wrap;gap:4px 10px}
.dca-price-now{font-family:var(--display);font-size:20px;font-weight:700;color:var(--gold);line-height:1.2}
.dca-price.is-free .dca-price-now{color:var(--cream);font-style:italic}
.dca-price-old{font-family:var(--mono);font-size:11px;color:var(--warm-gray);text-decoration:line-through}
.dca-price-off{font-family:var(--mono);font-size:9.5px;letter-spacing:.08em;padding:2px 6px;border-radius:var(--radius);background:rgba(110,134,152,.18);color:var(--steel-light)}

/* ═══ DANH MỤC ═══ */
.dca-marquee{position:relative;overflow:hidden;border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);padding:16px 0;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}
.dca-marquee-track{display:flex;width:max-content;animation:dcaMarquee var(--speed,40s) linear infinite}
.dca-marquee:hover .dca-marquee-track{animation-play-state:paused}
.dca-marquee-set{display:flex;gap:10px;padding-right:10px}
.dca-marquee a,body.dca-site .dca-marquee a{display:inline-flex;align-items:center;gap:10px;padding:9px 16px;border:1px solid var(--line-soft);border-radius:var(--radius);
  font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--cream);text-decoration:none;white-space:nowrap;transition:.2s}
.dca-marquee a i{font-style:normal;color:var(--gold);font-size:9.5px}
.dca-marquee a:hover{border-color:var(--gold);color:var(--gold);background:rgba(201,168,76,.06)}
@keyframes dcaMarquee{from{transform:translateX(0)}to{transform:translateX(-50%)}}

.dca-cat,body.dca-site a.dca-cat{position:relative;display:flex;flex-direction:column;gap:6px;padding:22px 20px 20px;border:1px solid var(--line-soft);
  background:rgba(245,240,232,.02);border-radius:var(--radius);text-decoration:none;transition:.22s;min-height:130px}
.dca-cat:hover{border-color:var(--gold);background:rgba(201,168,76,.05);transform:translateY(-3px)}
.dca-cat-n{font-family:var(--mono);font-style:normal;font-size:10px;letter-spacing:.16em;color:var(--steel-light)}
.dca-cat b{font-family:var(--display);font-size:20px;font-weight:700;color:var(--cream);line-height:1.3;margin-top:auto}
.dca-cat span{font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--warm-gray)}
.dca-cat-go{position:absolute;top:18px;right:18px;color:var(--gold);opacity:.5;transition:.2s}
.dca-cat:hover .dca-cat-go{opacity:1;transform:translate(2px,-2px)}

/* ═══ THẺ NỘI DUNG · AI · CTA ═══ */
.dca-card{display:flex;flex-direction:column;gap:12px;padding:26px 26px 24px;border:1px solid var(--line-soft);background:var(--surface);border-radius:var(--radius);height:100%;transition:.22s}
.dca-card:hover{border-color:var(--line)}
.dca-card.is-steel{background:var(--steel);border-color:rgba(110,134,152,.4)}
.dca-card.is-line{background:transparent}
.dca-card-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:6px}
.dca-card-ico{width:44px;height:44px;display:flex;align-items:center;justify-content:center;border:1px solid var(--line);color:var(--gold);font-size:20px;border-radius:var(--radius)}
.dca-card-kk{font-family:var(--mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--steel-light)}
.dca-card.is-steel .dca-card-kk{color:var(--gold)}
.dca .dca-card-t{font-family:var(--display);font-size:21px;line-height:1.3;color:var(--cream);font-weight:700}
.dca-card-t em{color:var(--gold);font-style:italic}
.dca-card-d{font-size:14px;color:var(--warm-gray);line-height:1.65}
.dca-card.is-steel .dca-card-d{color:rgba(245,240,232,.75)}
.dca-card-link,body.dca-site a.dca-card-link{margin-top:auto;padding-top:10px;font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--gold);text-decoration:none;display:inline-flex;align-items:center;gap:8px}
.dca-card-link i{transition:transform .2s}
.dca-card-link:hover i{transform:translateX(3px)}

.dca-ai{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,4vw,56px);align-items:center;padding:clamp(26px,4vw,44px);
  border:1px solid var(--line);background:linear-gradient(135deg,rgba(58,74,92,.28),transparent 60%),var(--surface);border-radius:var(--radius)}
.dca-ai-form{display:flex;flex-wrap:wrap;gap:10px;position:relative}
.dca-ai-form input[type=text]{flex:1 1 220px;height:48px;margin:0;padding:0 16px;background:var(--ink)!important;border:1px solid var(--line-soft)!important;
  border-radius:var(--radius);color:var(--cream);box-shadow:none!important;font-family:var(--body)}
.dca-ai-form input::placeholder{color:var(--warm-gray);opacity:1}
.dca-ai-form .dca-btn{height:48px}
.dca-ai-note{flex-basis:100%;font-family:var(--mono);font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--steel-light)}

.dca-cta{display:flex;align-items:center;justify-content:space-between;gap:24px 40px;flex-wrap:wrap;padding:clamp(28px,5vw,56px);border-radius:var(--radius);position:relative;overflow:hidden}
.dca-cta.is-gold{background:var(--gold);color:var(--ink)}
.dca-cta.is-gold::after{content:'';position:absolute;right:-6%;top:-40%;width:38%;aspect-ratio:1;border:1px solid rgba(10,10,10,.14);border-radius:50%;pointer-events:none}
.dca-cta.is-steel{background:var(--steel)}
.dca-cta.is-dark{background:var(--surface);border:1px solid var(--line)}
.dca-cta-copy{max-width:640px;position:relative;z-index:1}
.dca-cta-kk{font-family:var(--mono);font-size:10.5px;letter-spacing:.2em;text-transform:uppercase;margin-bottom:12px;color:var(--gold)}
.dca-cta.is-gold .dca-cta-kk{color:rgba(10,10,10,.7)}
.dca .dca-cta-t{font-family:var(--display);font-size:clamp(26px,3.4vw,42px);line-height:1.15;font-weight:700;color:var(--cream)}
.dca-cta.is-gold .dca-cta-t{color:var(--ink)}
.dca-cta-t em{font-style:italic;color:var(--gold)}
.dca-cta.is-gold .dca-cta-t em{color:var(--ink)}
.dca-cta-d{margin-top:12px!important;font-size:15px;line-height:1.7;color:var(--warm-gray)}
.dca-cta.is-gold .dca-cta-d{color:rgba(10,10,10,.72)}
.dca-cta.is-steel .dca-cta-d{color:rgba(245,240,232,.78)}
.dca-cta-btns{display:flex;flex-wrap:wrap;gap:12px;position:relative;z-index:1}

/* ═══ FOOTER ═══ */
body.dca-site #footer,body.dca-site .footer-wrapper{background:var(--ink)}
body.dca-site .absolute-footer{display:none}
.dca-footer{max-width:1240px;margin:0 auto;padding:clamp(48px,6vw,70px) clamp(16px,4vw,40px) 0;border-top:1px solid var(--line)}
.dca-f-top{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:32px}
.dca-f-brand p{margin-top:18px!important;max-width:340px;color:var(--warm-gray);font-size:14px;line-height:1.7}
.dca-f-brand .dca-f-slg{font-family:var(--display);font-style:italic;color:var(--gold);font-size:16px}
body.dca-site .dca-f-col h4{font-family:var(--mono);font-size:10px;font-weight:400;letter-spacing:.2em;text-transform:uppercase;color:var(--steel-light);margin-bottom:16px!important}
.dca-f-col ul{display:grid;gap:10px}
.dca-f-col a,body.dca-site .dca-f-col a{color:var(--cream);font-size:14px;text-decoration:none;opacity:.85;transition:.2s}
.dca-f-col a:hover{color:var(--gold);opacity:1}
.dca-f-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;margin-top:44px;padding:22px 0 28px;border-top:1px solid var(--line-soft);
  font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--warm-gray)}

body.dca-site #top-link{width:42px;height:42px;min-height:0;line-height:40px;border:1px solid var(--line)!important;
  background:rgba(10,10,10,.9)!important;color:var(--gold)!important;border-radius:var(--radius)!important;right:22px;bottom:22px;
  display:flex;align-items:center;justify-content:center;padding:0;margin:0;box-shadow:none}
body.dca-site #top-link:hover{background:var(--gold)!important;color:var(--ink)!important}

/* ═══ THANH MOBILE + BẢNG DANH MỤC ═══ */
.dca-mbar{display:none}
.dca-sheet[hidden]{display:none}
.dca-sheet{position:fixed;inset:0;z-index:10001}
.dca-sheet-bg{position:absolute;inset:0;background:rgba(0,0,0,.6);opacity:0;transition:.25s}
.dca-sheet-box{position:absolute;left:0;right:0;bottom:0;max-height:78vh;display:flex;flex-direction:column;background:var(--surface);
  border-top:1px solid var(--gold);transform:translateY(100%);transition:transform .25s}
.dca-sheet.is-open .dca-sheet-bg{opacity:1}
.dca-sheet.is-open .dca-sheet-box{transform:none}
.dca-sheet-head{display:flex;align-items:center;justify-content:space-between;padding:16px 18px;border-bottom:1px solid var(--line-soft);
  font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--gold)}
.dca-sheet-head button{border:0;background:none;color:var(--cream);font-size:14px;cursor:pointer;padding:4px 8px!important}
.dca-sheet-list{overflow:auto;padding:6px 10px calc(16px + env(safe-area-inset-bottom))}
.dca-sheet-list a,body.dca-site .dca-sheet-list a{display:flex;align-items:center;justify-content:space-between;padding:13px 10px;border-bottom:1px solid var(--line-soft);
  color:var(--cream);text-decoration:none;font-size:14.5px}
.dca-sheet-list small{font-family:var(--mono);font-size:10px;color:var(--warm-gray)}
.dca-sheet-list a.is-all{color:var(--gold);font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;border-bottom:0}

/* ═══ DANH SÁCH KHÓA HỌC ═══ */
.dca-archive .dca-head{margin-bottom:28px}
.dca-archive-grid{display:grid;grid-template-columns:240px minmax(0,1fr);gap:28px;align-items:start}
.dca-filter{position:sticky;top:calc(var(--header-h) + 60px);border:1px solid var(--line-soft);background:var(--surface);padding:10px;border-radius:var(--radius)}
.dca-filter-head{display:flex;align-items:center;justify-content:space-between;padding:8px 10px 10px;font-family:var(--mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--steel-light)}
.dca-filter-head.is-sub{margin-top:8px;border-top:1px solid var(--line-soft);padding-top:16px}
.dca-filter-head button{display:none;border:0;background:none;color:var(--cream);cursor:pointer;padding:2px 6px!important}
.dca-filter-list li{margin:0}
.dca-filter-list a,body.dca-site .dca-filter-list a{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:9px 10px;border-radius:var(--radius);
  color:var(--cream);font-size:13.5px;text-decoration:none;line-height:1.4;border-left:2px solid transparent}
.dca-filter-list a small{font-family:var(--mono);font-size:10px;color:var(--warm-gray)}
.dca-filter-list a:hover{background:rgba(245,240,232,.04);color:var(--gold)}
.dca-filter-list a.is-on{border-left-color:var(--gold);background:rgba(201,168,76,.08);color:var(--gold)}
.dca-filter-bg{display:none}
.dca-toolbar{display:flex;align-items:center;justify-content:flex-end;gap:12px;margin-bottom:18px}
.dca-filter-open{display:none!important;margin-right:auto!important}
.dca-sort{display:flex;align-items:center;gap:10px;margin:0}
.dca-sort label{white-space:nowrap;font-family:var(--mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--warm-gray);margin:0;font-weight:400}
.dca-sort select{height:38px;margin:0;min-width:180px;padding:0 34px 0 12px;background-color:var(--surface)!important;border:1px solid var(--line-soft)!important;
  color:var(--cream);border-radius:var(--radius);font-size:13px;box-shadow:none}
.dca-pages{margin-top:34px}
.dca-pages .page-numbers,body.dca-site .dca-pages a.page-numbers{display:inline-flex;align-items:center;justify-content:center;min-width:38px;height:38px;padding:0 10px;margin:0 4px 6px 0;
  border:1px solid var(--line-soft);border-radius:var(--radius);color:var(--cream);font-family:var(--mono);font-size:12px;text-decoration:none}
.dca-pages .page-numbers:hover{border-color:var(--gold);color:var(--gold)}
.dca-pages .page-numbers.current{background:var(--gold);border-color:var(--gold);color:var(--ink)}
.dca-pages .page-numbers.dots{border:0}

/* ═══ CHI TIẾT KHÓA HỌC ═══ */
.dca-course-hero{position:relative;padding:clamp(36px,5vw,64px) 0 clamp(30px,4vw,48px);border-bottom:1px solid var(--line);overflow:hidden}
.dca-course-hero::before{content:'';position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(ellipse 50% 70% at 90% 10%,rgba(58,74,92,.35),transparent 70%),radial-gradient(ellipse 40% 60% at 0 100%,rgba(201,168,76,.07),transparent 70%)}
.dca-course-hero .dca-wrap>*{max-width:calc(100% - 400px)}
.dca-crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:20px;font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase}
.dca-crumb a,body.dca-site .dca-crumb a{color:var(--gold);text-decoration:none}
.dca-crumb span{color:var(--warm-gray)}
.dca-course-h1.dca-h1{font-size:clamp(28px,3.8vw,48px);margin-bottom:14px}
.dca-course-sub{font-size:16px;line-height:1.7;color:var(--warm-gray);max-width:760px;margin:0 0 22px}
.dca-course-facts{display:flex;flex-wrap:wrap;align-items:center;gap:8px 20px;font-size:13.5px;color:var(--cream);margin-bottom:22px}
.dca-course-facts>span{display:inline-flex;align-items:center;gap:6px}
.dca-course-facts i{color:var(--steel-light)}
.dca-score b{font-family:var(--display);font-size:18px;color:var(--gold)}
.dca-score i{color:var(--gold)!important}
.dca-status{font-family:var(--mono);font-size:9.5px;letter-spacing:.14em;text-transform:uppercase;padding:4px 9px;border-radius:var(--radius);border:1px solid var(--line-soft)}
.dca-status.is-enrolled{border-color:var(--gold);color:var(--gold)}
.dca-status.is-free,.dca-status.is-public{border-color:rgba(110,134,152,.5);color:var(--steel-light)}
.dca-status.is-paid{border-color:var(--line);color:var(--cream)}
.dca-teacher{display:flex;align-items:center;gap:12px}
.dca-teacher img{width:44px;height:44px;border-radius:var(--radius);border:1px solid var(--line)}
.dca-teacher small{display:block;font-family:var(--mono);font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--warm-gray)}
.dca-teacher b{display:block;color:var(--cream);font-size:15px}

.dca-course-main{padding:clamp(28px,4vw,44px) 0 clamp(56px,7vw,90px)}
.dca-course-grid{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:40px;align-items:start}
.dca-course-left{display:grid;gap:18px}
.dca-tags{display:flex;flex-wrap:wrap;gap:8px}
.dca-tags a,body.dca-site .dca-tags a{font-family:var(--mono);font-size:10.5px;letter-spacing:.08em;padding:5px 10px;border:1px solid var(--line-soft);border-radius:var(--radius);color:var(--warm-gray);text-decoration:none}
.dca-tags a:hover{color:var(--gold);border-color:var(--gold)}
.dca-box{border:1px solid var(--line-soft);background:var(--surface);padding:clamp(20px,3vw,30px);border-radius:var(--radius)}
.dca-box-head{display:flex;align-items:baseline;justify-content:space-between;flex-wrap:wrap;gap:8px 20px;margin-bottom:18px}
.dca-box-head .dca-box-t{margin-bottom:0}
.dca-box-head span{font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--warm-gray)}
body.dca-site .dca-box-t{font-family:var(--display);font-size:22px;font-weight:700;color:var(--cream);margin:0 0 18px;line-height:1.3;
  padding-bottom:14px;border-bottom:1px solid var(--line-soft)}
.dca-box-head{padding-bottom:14px;border-bottom:1px solid var(--line-soft)}
.dca-box-head .dca-box-t{padding-bottom:0;border-bottom:0}
.dca-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(280px,100%),1fr));gap:11px 26px;margin:0;padding:0;list-style:none}
.dca-list li{position:relative;padding-left:22px;margin:0;font-size:14px;line-height:1.6;color:var(--cream)}
.dca-list.is-yes li::before{content:'✓';position:absolute;left:0;color:var(--gold)}
.dca-list.is-dash li::before{content:'—';position:absolute;left:0;color:var(--gold);opacity:.65}
.dca-list.is-dash li{color:var(--warm-gray)}
.dca-curri{display:grid;gap:8px}
.dca-curri details{border:1px solid var(--line-soft);border-radius:var(--radius);background:rgba(245,240,232,.015)}
.dca-curri details[open]{border-color:var(--line)}
.dca-curri summary{display:flex;align-items:center;gap:14px;padding:14px 16px;cursor:pointer;list-style:none;color:var(--cream);font-weight:600;font-size:14.5px}
.dca-curri summary::-webkit-details-marker{display:none}
.dca-curri summary::after{content:'+';margin-left:6px;font-family:var(--mono);color:var(--gold);font-size:16px;font-weight:400}
.dca-curri details[open] summary::after{content:'−'}
.dca-curri summary span{flex:1}
.dca-curri-n{font-family:var(--mono);font-style:normal;font-size:10px;color:var(--steel-light);letter-spacing:.14em}
.dca-curri summary small{font-family:var(--mono);font-size:10px;letter-spacing:.1em;color:var(--warm-gray);font-weight:400}
.dca-curri ul{margin:0;padding:0 16px 10px;list-style:none;border-top:1px solid var(--line-soft)}
.dca-curri li{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 0 10px 28px;margin:0;border-bottom:1px solid rgba(245,240,232,.05);font-size:13.5px}
.dca-curri li:last-child{border-bottom:0}
.dca-curri li a,.dca-curri li span{display:flex;align-items:center;gap:10px;color:var(--cream);text-decoration:none}
.dca-curri li span{color:var(--warm-gray)}
.dca-curri li a:hover{color:var(--gold)}
.dca-curri li i{color:var(--steel-light);font-size:15px}
.dca-curri li small{font-family:var(--mono);font-size:9.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--warm-gray);flex-shrink:0}
.dca-prose{color:var(--cream);font-size:15px;line-height:1.8;position:relative}
.dca-prose p{margin-bottom:1em}
.dca-prose h2,.dca-prose h3,.dca-prose h4{margin:1.4em 0 .6em;line-height:1.3}
.dca-prose a{color:var(--gold)}
.dca-prose.is-collapsed{max-height:420px;overflow:hidden}
.dca-prose.is-collapsed::after{content:'';position:absolute;left:0;right:0;bottom:0;height:120px;background:linear-gradient(transparent,var(--surface))}
.dca-prose.is-collapsed.is-open{max-height:none}
.dca-prose.is-collapsed.is-open::after{display:none}
.dca-more{margin-top:14px!important;padding:9px 16px!important;border:1px solid var(--line)!important;background:transparent;color:var(--gold);cursor:pointer;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;border-radius:var(--radius)}
.dca-more:hover{background:rgba(201,168,76,.08)}

.dca-course-side{position:relative;align-self:stretch;margin-top:calc(-1 * clamp(200px,22vw,280px))}
.dca-buy{position:sticky;top:calc(var(--header-h) + 60px);border:1px solid var(--line);background:var(--surface);border-radius:var(--radius);overflow:hidden;box-shadow:0 24px 50px rgba(0,0,0,.45)}
.dca-buy-img{aspect-ratio:16/9;overflow:hidden;background:var(--surface-2)}
.dca-buy-img img{width:100%;height:100%;object-fit:cover;display:block}
.dca-buy-body{padding:22px}
.dca-buy .dca-price{margin-bottom:16px}
.dca-buy .dca-price-now{font-size:30px}
.dca-buy-meta{display:grid;gap:10px;margin:20px 0 0;padding:18px 0 0;list-style:none;border-top:1px solid var(--line-soft)}
.dca-buy-meta li{display:flex;align-items:center;gap:10px;margin:0;font-size:13.5px;color:var(--cream)}
.dca-buy-meta i{color:var(--steel-light);font-size:16px}
.dca-mini-meta{font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--warm-gray)}

/* Nút Tutor trong khối mua */
.dca-buy .tutor-btn,.dca-buy .tutor-btn-primary,.dca-buy button[type=submit]{width:100%}
body.dca-site .dca-buy .tutor-btn-primary:not(.dca-btn){background:var(--gold);border-color:var(--gold);color:var(--ink);border-radius:var(--radius);
  font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;padding:13px 22px}

/* ═══ ĐĂNG NHẬP / ĐĂNG KÝ ═══ */
.dca-auth{padding:clamp(40px,6vw,80px) 0;position:relative;overflow:hidden}
.dca-auth::before{content:'';position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(ellipse 45% 55% at 15% 30%,rgba(201,168,76,.08),transparent 70%),radial-gradient(ellipse 40% 60% at 90% 90%,rgba(58,74,92,.3),transparent 65%)}
.dca-auth-shell{display:grid;grid-template-columns:1fr minmax(0,460px);gap:clamp(30px,6vw,80px);align-items:center;position:relative}
.dca-auth-intro h1{font-family:var(--display);font-size:clamp(30px,4vw,48px);line-height:1.15;color:var(--cream);margin:0 0 16px}
.dca-auth-intro>p{color:var(--warm-gray);font-size:15.5px;line-height:1.75;max-width:480px;margin:0 0 24px}
.dca-auth-points{display:grid;gap:10px;margin:0;padding:0;list-style:none}
.dca-auth-points li{display:flex;gap:10px;align-items:flex-start;margin:0;font-size:14px;color:var(--cream)}
.dca-auth-points li i{color:var(--gold);font-size:16px;margin-top:2px}
.dca-auth-card{border:1px solid var(--line);background:var(--surface);border-radius:var(--radius);padding:clamp(24px,4vw,36px);position:relative;max-width:560px;margin:0 auto;width:100%}
.dca-auth-card::before{content:'';position:absolute;top:-1px;left:-1px;width:16px;height:16px;border-top:1px solid var(--gold);border-left:1px solid var(--gold)}
.dca-auth-card-head{margin-bottom:22px;padding-bottom:18px;border-bottom:1px solid var(--line-soft)}
.dca-auth-card-head h2{font-family:var(--display);font-size:24px;color:var(--cream);margin:0 0 6px}
.dca-auth-card-head p{margin:0;color:var(--warm-gray);font-size:13.5px}
.dca-auth-form{display:grid;gap:6px}
.dca-auth-form label{font-family:var(--mono);font-size:10px;font-weight:400;letter-spacing:.16em;text-transform:uppercase;color:var(--steel-light);margin:10px 0 2px}
.dca-auth-form .dca-btn{margin-top:14px}
.dca-fields{display:grid;grid-template-columns:1fr 1fr;gap:0 14px}
.dca-fields>div{display:grid;gap:6px}
.dca-auth-row{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:10px;font-size:13px}
.dca-auth-form label.dca-auth-check{display:inline-flex;align-items:center;gap:8px;margin:0;font-family:var(--body);font-size:13px;letter-spacing:0;text-transform:none;color:var(--cream)}
.dca-auth-check input{margin:0}
.dca-auth-foot{margin-top:16px;text-align:center;font-size:13.5px;color:var(--warm-gray)}
.dca-auth-note{font-size:12.5px;color:var(--warm-gray);margin:8px 0 0}
.dca-alert{padding:12px 14px;border:1px solid rgba(168,117,106,.5);border-left:3px solid var(--rust);background:rgba(168,117,106,.08);color:var(--cream);font-size:13.5px;margin-bottom:14px;border-radius:var(--radius)}
.dca-alert p{margin:0}

/* Ô nhập trên nền tối (form Flatsome / Tutor / trang thường) */
body.dca-site input[type=text],body.dca-site input[type=email],body.dca-site input[type=password],body.dca-site input[type=search],
body.dca-site input[type=tel],body.dca-site input[type=number],body.dca-site input[type=url],body.dca-site input[type=date],
body.dca-site textarea,body.dca-site select{
  background-color:var(--ink);border:1px solid var(--line-soft);color:var(--cream);border-radius:var(--radius);box-shadow:none}
body.dca-site input:focus,body.dca-site textarea:focus,body.dca-site select:focus{border-color:var(--gold);box-shadow:0 0 0 2px rgba(201,168,76,.15);background-color:var(--ink);color:var(--cream)}
body.dca-site ::placeholder{color:var(--warm-gray)}
body.dca-site select{background-size:10px 6px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23C9A84C'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center}
.dca-auth-form input[type=text],.dca-auth-form input[type=email],.dca-auth-form input[type=password]{height:46px;margin:0;padding:0 14px;font-size:14px}

/* Trang thường của Flatsome (Hỗ trợ, Giảng viên…) */
body.dca-site .page-wrapper,body.dca-site .blog-wrapper{color:var(--cream)}
body.dca-site .entry-content{color:var(--cream)}
body.dca-site .page-title,body.dca-site .entry-title{color:var(--cream)}
body.dca-site .is-divider{background-color:var(--line)}
body.dca-site .button.primary,body.dca-site button.primary,body.dca-site input[type=submit].primary{background:var(--gold);color:var(--ink)}
body.dca-site .button,body.dca-site button[type=submit],body.dca-site input[type=submit]{border-radius:var(--radius)}

/* ═══ TUTOR LMS ═══ */
body.dca-site{
  --tutor-color-primary:#C9A84C;
  --tutor-color-primary-rgb:201,168,76;
  --tutor-color-primary-hover:#E8C96A;
}
/* Dashboard học viên (Tutor 4) là giao diện riêng toàn màn hình, tự có nền tối — theme không can thiệp. */

/* Trang khóa học / bài học do Tutor render trên nền tối */
body.dca-site:not(.tutor-screen-frontend-dashboard) .tutor-color-black{color:var(--cream)}
body.dca-site:not(.tutor-screen-frontend-dashboard) .tutor-color-secondary,
body.dca-site:not(.tutor-screen-frontend-dashboard) .tutor-color-muted{color:var(--warm-gray)}
body.dca-site .tutor-btn-primary{border-radius:var(--radius)}
body.dca-site:not(.tutor-screen-frontend-dashboard) .tutor-btn-primary{color:var(--ink)}
body.dca-site .dca-auth .dca-btn.tutor-btn,body.dca-site .dca-auth .dca-btn.tutor-btn:hover{background:var(--gold);border:1px solid var(--gold);color:var(--ink);
  border-radius:var(--radius);font-family:var(--mono);font-size:11px;font-weight:400;letter-spacing:.14em;text-transform:uppercase;padding:14px 22px;height:auto}
body.dca-site .dca-auth .dca-btn.tutor-btn:hover{background:var(--gold-light);border-color:var(--gold-light)}
body.dca-site .dca-auth a{color:var(--gold)}
body.dca-site .dca-auth .tutor-form-control{background:var(--ink);color:var(--cream);border:1px solid var(--line-soft);border-radius:var(--radius);padding:0 14px}

/* ═══ WOOCOMMERCE (Flatsome) — chỉ có tác dụng khi Woo bật ═══ */
body.dca-site .woocommerce-cart .shop_table,body.dca-site .woocommerce-checkout .shop_table,body.dca-site .cart_totals,
body.dca-site .woocommerce-checkout-review-order,body.dca-site .checkout-sidebar{color:var(--cream)}
body.dca-site .shop_table th,body.dca-site .shop_table td{border-color:var(--line-soft)}
body.dca-site .shop_table thead th,body.dca-site .cart_totals th{font-family:var(--mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--steel-light)}
body.dca-site .woocommerce-Price-amount{color:var(--gold)}
body.dca-site .checkout-button,body.dca-site #place_order,body.dca-site .button.checkout{background:var(--gold)!important;color:var(--ink)!important;border-radius:var(--radius)}
body.dca-site .woocommerce-message,body.dca-site .woocommerce-info,body.dca-site .message-container{background:var(--surface);color:var(--cream);border-left:3px solid var(--gold)}
body.dca-site .col-inner.has-border,body.dca-site .checkout-sidebar{border-color:var(--line)!important;background:var(--surface)}

/* ═══ RESPONSIVE ═══ */
@media(max-width:1180px){
  .dca-courses[style*="--cols:4"],.dca-courses[style*="--cols:5"],.dca-courses[style*="--cols:6"]{grid-template-columns:repeat(3,minmax(0,1fr))}
  .dca-f-top{grid-template-columns:1fr 1fr 1fr}
  .dca-f-brand{grid-column:1/-1}
  .dca-acc-learn{display:none!important}
  .dca-cart-t{display:none}
}
@media(max-width:1024px){
  .dca-course-grid{grid-template-columns:minmax(0,1fr) 320px;gap:28px}
  .dca-course-hero .dca-wrap>*{max-width:calc(100% - 350px)}
}
@media(max-width:849px){
  :root{--header-h:56px}
  .dca-hero-grid,.dca-ai,.dca-auth-shell{grid-template-columns:1fr}
  .dca-hero-show{max-width:560px}
  .dca-courses{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
  .dca-grid.is-fixed.is-stack-sm{grid-template-columns:1fr}
  .dca-grid.is-fixed.is-two-sm{grid-template-columns:1fr 1fr}
  .dca-course-grid{grid-template-columns:1fr}
  .dca-course-hero .dca-wrap>*{max-width:none}
  .dca-course-side{margin-top:0;order:-1}
  .dca-buy{position:static}
  .dca-archive-grid{grid-template-columns:1fr}
  .dca-filter{position:fixed;top:0;bottom:0;left:0;z-index:10001;width:min(320px,86vw);overflow:auto;transform:translateX(-102%);transition:transform .25s;border-radius:0;border-width:0 1px 0 0}
  .dca-filter.is-open{transform:none}
  .dca-filter-head button{display:block}
  .dca-filter.is-open+.dca-filter-bg{display:block;position:fixed;inset:0;z-index:10000;background:rgba(0,0,0,.6)}
  .dca-filter-open{display:inline-flex!important}
  .dca-toolbar{justify-content:space-between}
  .dca-sort select{min-width:150px}
  .dca-auth-intro{text-align:left}

  /* Thanh mobile */
  body.dca-site.dca-has-mbar{padding-bottom:calc(62px + env(safe-area-inset-bottom))}
  body.dca-site.dca-has-mbar #top-link{bottom:calc(76px + env(safe-area-inset-bottom))}
  .dca-mbar{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:1000;height:calc(62px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);
    background:rgba(10,10,10,.97);border-top:1px solid var(--line);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}
  .dca-mbar>a,.dca-mbar>button{flex:1;position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;border:0;background:none;
    color:var(--warm-gray);text-decoration:none;font-family:var(--mono);font-size:9px;letter-spacing:.1em;text-transform:uppercase;cursor:pointer;padding:0!important;margin:0}
  .dca-mbar i{font-size:19px;line-height:1}
  .dca-mbar>a.is-on,.dca-mbar>a:hover,.dca-mbar>button:hover{color:var(--gold)}
  .dca-mbar-mid i{width:40px;height:40px;display:flex;align-items:center;justify-content:center;margin-top:-18px;background:var(--gold);color:var(--ink);border-radius:var(--radius);box-shadow:0 0 0 4px var(--ink)}
  .dca-mbar em{position:absolute;top:8px;left:calc(50% + 6px);min-width:16px;height:16px;padding:0 4px;border-radius:8px;background:var(--gold);color:var(--ink);
    font-style:normal;font-size:9px;display:flex;align-items:center;justify-content:center}
}
@media(max-width:549px){
  .dca-courses{grid-template-columns:1fr}
  .dca-courses.is-two-sm{grid-template-columns:1fr 1fr;gap:10px}
  .dca-courses.is-two-sm .dca-course-body{padding:12px}
  .dca-courses.is-two-sm .dca-course-t{font-size:13.5px}
  .dca-grid.is-fixed.is-two-sm{grid-template-columns:1fr 1fr}
  .dca-hero-stats>div{flex-basis:30%;padding-right:10px;margin-right:10px}
  .dca-hero-cta .dca-btn{flex:1}
  .dca-f-top{grid-template-columns:1fr 1fr}
  .dca-fields{grid-template-columns:1fr}
  .dca-cta-btns,.dca-cta-btns .dca-btn{width:100%}
  .dca-sort label{display:none}
}
@media(prefers-reduced-motion:reduce){
  .dca-marquee-track{animation:none}
  .dca-slide,.dca-course,.dca-btn{transition:none}
}

/* ═══ UX Builder: giữ grid khi builder bọc thêm thẻ ═══ */
.dca-grid>.uxb-element,.dca-grid>[ng-repeat]{min-width:0}