/* ==========================================================================
   HOC — CSS dùng chung cho các trang chi tiết Workshop
   Kế thừa hệ màu/font từ website HOC. Sửa 1 file này = cả 4 trang đổi theo.
   Màu logo: navy #2E3356 · cam #F2913D · cyan #45BEE8
   ========================================================================== */
:root{
  --navy:#2E3356; --navy-2:#23273f;
  --gold:#F2913D; --gold-2:#f6a95f;
  --blue:#2a9fcf; --blue-2:#45BEE8;
  --ink:#33384d; --muted:#6b7180; --line:#e7ebf2;
  --bg-soft:#f6fafd;
  --shadow:0 12px 30px rgba(20,30,60,.10);
  --shadow-lg:0 24px 60px rgba(20,30,60,.18);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Be Vietnam Pro',-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  color:var(--ink);background:#fff;line-height:1.7;font-size:17px;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 22px}
.section{padding:74px 0}
.section-alt{background:var(--bg-soft)}
.section-head{text-align:center;max-width:760px;margin:0 auto 48px}
.eyebrow{display:inline-block;color:var(--gold);font-weight:800;font-size:13px;letter-spacing:2px;text-transform:uppercase;margin-bottom:12px}
.section-head h2{font-size:36px;line-height:1.2;color:var(--navy);font-weight:800}
.section-head p{margin-top:14px;color:var(--muted);font-size:17px}

/* ---------- NÚT ---------- */
.btn{display:inline-flex;align-items:center;gap:9px;font-weight:800;font-size:15px;letter-spacing:.3px;padding:14px 28px;border-radius:50px;transition:.25s;border:none;cursor:pointer;font-family:inherit;line-height:1}
.btn svg{width:18px;height:18px;fill:currentColor}
.btn-primary{background:var(--gold);color:#3a2a05;box-shadow:0 8px 20px rgba(230,178,76,.4)}
.btn-primary:hover{background:var(--gold-2);transform:translateY(-2px)}
.btn-navy{background:var(--navy);color:#fff}
.btn-navy:hover{background:var(--navy-2);transform:translateY(-2px)}
.btn-outline{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.6)}
.btn-outline:hover{background:#fff;color:var(--navy)}
.btn-zalo{background:#0068FF;color:#fff}
.btn-zalo:hover{background:#0052cc;transform:translateY(-2px)}

/* ---------- HEADER ---------- */
.header{position:sticky;top:0;z-index:100;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 2px 14px rgba(20,30,60,.06)}
.header-row{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px;padding:12px 0}
.h-hotline{font-size:15px;color:var(--muted);white-space:nowrap}
.h-hotline b{color:var(--navy);font-weight:800}
.h-hotline .sep{margin:0 8px;color:var(--line)}
.h-logo{justify-self:center;display:flex;align-items:center}
.h-logo img{height:66px;width:auto}
.h-right{justify-self:end;display:flex;align-items:center;gap:16px}
.h-login{color:var(--navy);font-weight:700;font-size:14.5px;white-space:nowrap}
.h-login:hover{color:var(--blue-2)}
.h-cta{background:var(--navy);color:#fff;font-weight:800;font-size:14px;letter-spacing:.5px;padding:12px 24px;border-radius:50px;text-transform:uppercase;white-space:nowrap;box-shadow:0 8px 20px rgba(18,58,134,.22);transition:.25s}
.h-cta:hover{background:var(--navy-2);transform:translateY(-2px)}

/* thanh điều hướng phụ trong trang */
.subnav{background:var(--navy);border-top:1px solid rgba(255,255,255,.08)}
.subnav ul{list-style:none;display:flex;justify-content:center;flex-wrap:wrap;gap:6px}
.subnav a{display:block;color:#c9cde3;font-weight:600;font-size:14px;letter-spacing:.4px;padding:13px 18px;text-transform:uppercase;transition:.2s}
.subnav a:hover{color:#fff}
.subnav a.on,.subnav a:hover{box-shadow:inset 0 -3px 0 var(--gold)}

/* ---------- HERO ---------- */
.wh-hero{position:relative;background:linear-gradient(135deg,var(--navy) 0%,var(--navy-2) 60%,#1a1d30 100%);color:#fff;overflow:hidden}
.wh-hero::after{content:"";position:absolute;right:-120px;top:-120px;width:460px;height:460px;background:radial-gradient(circle,rgba(69,190,232,.28),transparent 70%);pointer-events:none}
.wh-hero-inner{position:relative;z-index:2;padding-top:50px;padding-bottom:50px;text-align:center}
.wh-banner{max-width:960px;margin:0 auto}
.wh-banner img{width:100%;display:block;border-radius:18px;box-shadow:0 30px 70px rgba(0,0,0,.38)}
.wh-below{max-width:960px;margin:28px auto 0;display:flex;flex-direction:column;align-items:center;gap:20px}
.wh-meta{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.wh-meta span{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);padding:9px 16px;border-radius:50px;font-size:14px;font-weight:600;color:#eef1fb}
.wh-meta svg{width:16px;height:16px;fill:var(--blue-2)}
.wh-cta{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}

/* ---------- GIỚI THIỆU ---------- */
.wintro-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.wintro-text h2{font-size:32px;color:var(--navy);font-weight:800;line-height:1.25;margin-bottom:18px}
.wintro-text h2 span{color:var(--gold)}
.wintro-text p{margin-bottom:16px;color:#40465c}
.wintro-text .who{background:var(--bg-soft);border-left:5px solid var(--gold);border-radius:0 14px 14px 0;padding:18px 22px;margin-top:22px}
.wintro-text .who b{color:var(--navy)}
.wintro-media img{width:100%;border-radius:18px;box-shadow:var(--shadow)}

/* ---------- LỘ TRÌNH / NỘI DUNG ---------- */
.wcurr{display:grid;gap:18px;max-width:900px;margin:0 auto}
.wmod{display:flex;gap:20px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px 26px;box-shadow:var(--shadow);transition:.25s}
.wmod:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:transparent}
.wmod-num{flex:none;width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,var(--gold),var(--gold-2));color:#fff;font-weight:900;font-size:22px;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 18px rgba(242,145,61,.35)}
.wmod-body h3{font-size:20px;color:var(--navy);font-weight:800;margin-bottom:6px}
.wmod-body p{color:var(--muted);font-size:15.5px}
a.wmod{text-decoration:none;color:inherit}
a.wmod-has-link:hover .wmod-link{gap:10px}
.wmod-link{display:inline-flex;align-items:center;gap:6px;margin-top:12px;color:var(--gold);font-weight:800;font-size:14.5px;transition:.2s}
a.wmod-has-link:hover .wmod-link{color:var(--gold-2);transform:translateX(3px)}

/* ---------- ĐIỂM NỔI BẬT ---------- */
.wben-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.wben{background:#fff;border-radius:16px;padding:30px 26px;box-shadow:var(--shadow);border:1px solid var(--line);text-align:center}
.wben .ic{width:60px;height:60px;border-radius:16px;background:var(--bg-soft);display:flex;align-items:center;justify-content:center;margin:0 auto 16px}
.wben .ic svg{width:30px;height:30px;fill:var(--gold)}
.wben h3{font-size:18px;color:var(--navy);font-weight:800;margin-bottom:8px}
.wben p{color:var(--muted);font-size:15px}

/* ---------- GIẢNG VIÊN ---------- */
.winst{display:flex;gap:34px;align-items:center;max-width:900px;margin:0 auto;background:#fff;border-radius:22px;box-shadow:var(--shadow);border:1px solid var(--line);overflow:hidden}
.winst-photo{flex:none;width:280px;align-self:stretch}
.winst-photo img{width:100%;height:100%;object-fit:cover;object-position:center top}
.winst-info{padding:32px 32px 32px 8px}
.winst-info .role{color:var(--gold);font-weight:800;font-size:13px;letter-spacing:1.5px;text-transform:uppercase;margin-bottom:6px}
.winst-info h3{font-size:26px;color:var(--navy);font-weight:800;margin-bottom:12px}
.winst-info p{color:#40465c;margin-bottom:10px;font-size:16px}
.winst-info ul{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.winst-info li{background:var(--bg-soft);color:var(--navy);font-weight:600;font-size:13.5px;padding:7px 14px;border-radius:50px}

/* 2 giảng viên: lưới 2 cột, thẻ dọc */
.winst-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px;max-width:960px;margin:0 auto}
.winst.compact{flex-direction:column;text-align:center;align-items:stretch}
.winst.compact .winst-photo{width:100%;height:340px}
.winst.compact .winst-info{padding:26px 28px 30px}
.winst.compact .winst-info ul{justify-content:center}
@media(max-width:680px){ .winst-grid{grid-template-columns:1fr} }

/* ---------- KIẾN THỨC (BLOG) ---------- */
.wblog-list{min-height:60px}
.course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.course-card{background:#fff;border-radius:16px;overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line);display:flex;flex-direction:column;transition:.25s}
.course-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.course-thumb{position:relative;display:block;aspect-ratio:16/10;overflow:hidden;background:var(--navy)}
.course-thumb img{width:100%;height:100%;object-fit:cover}
.course-thumb .news-noimg{width:100%;height:100%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:900;font-size:32px;letter-spacing:2px;background:linear-gradient(135deg,var(--navy),var(--blue))}
.course-tag{position:absolute;top:12px;right:12px;background:var(--gold);color:#fff;font-size:12px;font-weight:700;padding:6px 13px;border-radius:50px}
.course-tag.navy{background:var(--navy)}
.course-body{padding:20px 22px 24px;display:flex;flex-direction:column;flex:1}
.course-body h3{font-size:18px;color:var(--navy);font-weight:800;line-height:1.35;margin-bottom:10px}
.course-body p{color:var(--muted);font-size:14.5px;flex:1;margin-bottom:16px}
.wblog-empty{text-align:center;color:var(--muted);background:var(--bg-soft);border:1px dashed var(--line);border-radius:16px;padding:40px 20px}
.wblog-empty b{color:var(--navy)}
.wblog-more-wrap{text-align:center;margin-top:34px}
#wblog-more,#kt-more{cursor:pointer}
#wblog-more:disabled,#kt-more:disabled{opacity:.6;cursor:default}

/* ---------- TRANG KIẾN THỨC ---------- */
.kt-hero{background:linear-gradient(135deg,var(--navy),var(--navy-2));color:#fff;text-align:center;padding:56px 0}
.kt-hero .eyebrow{color:var(--gold-2)}
.kt-hero h1{font-size:38px;line-height:1.2;font-weight:900;margin:4px 0 12px}
.kt-hero p{color:#d3d8ef;max-width:660px;margin:0 auto;font-size:17px}
.kt-tabs{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:44px}
.kt-tab{border:1.5px solid var(--line);background:#fff;color:var(--navy);font-weight:700;font-size:14.5px;padding:10px 20px;border-radius:50px;cursor:pointer;transition:.2s;font-family:inherit}
.kt-tab:hover{border-color:var(--gold);color:var(--gold)}
.kt-tab.on{background:var(--navy);color:#fff;border-color:var(--navy)}

/* ---------- ĐĂNG KÝ ---------- */
.wreg{background:linear-gradient(135deg,var(--navy),var(--navy-2));color:#fff}
.wreg-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.wreg-info h2{font-size:32px;font-weight:800;line-height:1.25;margin-bottom:16px}
.wreg-info h2 span{color:var(--gold)}
.wreg-info p{color:#d3d8ef;margin-bottom:22px}
.wreg-info .zrow{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:14px}
.wreg-info .hot{font-size:15px;color:#c9cde3}
.wreg-info .hot b{color:#fff;font-size:19px}
.wreg-form{background:#fff;border-radius:20px;padding:32px;box-shadow:var(--shadow-lg);color:var(--ink)}
.wreg-form h3{color:var(--navy);font-size:22px;font-weight:800;margin-bottom:6px}
.wreg-form .sub{color:var(--muted);font-size:14.5px;margin-bottom:20px}
.wreg-form label{display:block;font-weight:600;font-size:14px;color:var(--navy);margin:0 0 6px}
.wreg-form input,.wreg-form textarea{width:100%;border:1.5px solid var(--line);border-radius:11px;padding:13px 15px;font-family:inherit;font-size:15px;margin-bottom:15px;transition:.2s;background:#fff;color:var(--ink)}
.wreg-form input:focus,.wreg-form textarea:focus{outline:none;border-color:var(--gold);box-shadow:0 0 0 3px rgba(242,145,61,.15)}
.wreg-form textarea{min-height:80px;resize:vertical}
.wreg-form .btn{width:100%;justify-content:center;font-size:16px;text-transform:uppercase}
.wreg-form .note{text-align:center;font-size:13px;color:var(--muted);margin-top:12px}
.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}

/* ---------- FOOTER ---------- */
.footer{background:var(--navy);color:#c9cde3;padding:56px 0 0;font-size:15px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px}
.foot-brand img{height:62px;margin-bottom:16px}
.foot-brand p{line-height:1.7;color:#aab0cf;font-size:14.5px}
.foot-social{display:flex;gap:12px;margin-top:16px}
.foot-social a{width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,.1);display:flex;align-items:center;justify-content:center;transition:.25s}
.foot-social a:hover{background:var(--gold);transform:translateY(-2px)}
.foot-social svg{width:19px;height:19px;fill:#fff}
.footer h4{color:#fff;font-size:16px;font-weight:700;margin-bottom:16px}
.foot-col ul{list-style:none}
.foot-col li{margin-bottom:11px}
.foot-col a{color:#aab0cf}
.foot-col a:hover{color:var(--gold)}
.foot-contact li{display:flex;gap:10px;align-items:flex-start;line-height:1.5}
.foot-contact svg{width:17px;height:17px;fill:var(--gold);flex:none;margin-top:3px}
.foot-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:44px;padding:20px 0;text-align:center;font-size:13.5px;color:#9298b8}
.foot-bottom span{color:#fff;font-weight:700}

/* ---------- HIỆU ỨNG CUỘN HIỆN ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- RESPONSIVE ---------- */
@media(max-width:960px){
  .wintro-grid,.wreg-grid{grid-template-columns:1fr;gap:32px}
  .wben-grid{grid-template-columns:1fr 1fr}
  .course-grid{grid-template-columns:1fr 1fr}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media(max-width:680px){
  .section{padding:52px 0}
  .h-hotline,.h-login{display:none}
  .header-row{grid-template-columns:auto 1fr;gap:10px}
  .h-logo{justify-self:start}
  .h-logo img{height:50px}
  .wh-hero-inner{padding-top:30px;padding-bottom:30px}
  .wh-below{margin-top:22px;gap:16px}
  .section-head h2,.wintro-text h2,.wreg-info h2{font-size:26px}
  .wben-grid,.course-grid,.foot-grid{grid-template-columns:1fr}
  .winst{flex-direction:column;text-align:center}
  .winst-photo{width:100%;height:320px}
  .winst-info{padding:0 26px 30px}
  .winst-info ul{justify-content:center}
  .subnav ul{justify-content:flex-start;flex-wrap:nowrap;overflow-x:auto}
}