/* ============================================================
   LiftHub — Hệ thống thiết kế website tổng
   Sửa màu, khoảng cách, bo góc ở khối :root bên dưới là đổi cả site.
   ============================================================ */

:root{
  /* ---- Nền & chữ ---- */
  --bg:#F5F7FA;
  --bg-alt:#EDF1F6;
  --surface:#FFFFFF;
  --ink:#0B1C33;
  --ink-2:#3C4F68;
  --muted:#697E97;
  --line:#DCE3EC;
  --line-2:#C3CEDB;

  /* ---- Navy nền tối ---- */
  --navy:#0A1A2F;
  --navy-2:#102841;
  --navy-3:#17395C;
  --on-navy:#E9EFF6;
  --on-navy-2:#A9BCD0;

  /* ---- Màu thương hiệu (lấy từ logo LiftHub) ---- */
  --brand:#44689E;        /* xanh thép LiftHub, đậm đủ để đạt tương phản */
  --brand-dark:#35537F;
  --brand-soft:#E7EDF6;

  /* ---- Màu nhận dạng từng sàn ---- */
  --s1:#0E8F6B;  --s1-soft:#DCF2EA;   /* Sàn thang máy  — ngọc */
  --s2:#A9712A;  --s2-soft:#F7EBDA;   /* Sàn vật tư     — đồng */
  --s3:#44689E;  --s3-soft:#E7EDF6;   /* Sàn đào tạo    — xanh thép */

  --gold:#C8A24A;
  --ok:#0E8F6B;
  --warn:#A9712A;

  /* ---- Hình khối ---- */
  --r-s:6px; --r:12px; --r-l:18px;
  --sh-1:0 1px 2px rgba(11,28,51,.06), 0 6px 18px -12px rgba(11,28,51,.3);
  --sh-2:0 2px 4px rgba(11,28,51,.07), 0 18px 40px -22px rgba(11,28,51,.45);
  --wrap:1180px;
  --gut:22px;
}

@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#070E18; --bg-alt:#0C1724; --surface:#0F1C2C;
    --ink:#E9EFF6; --ink-2:#C3D1E0; --muted:#8699AE;
    --line:#1C2B3D; --line-2:#2A3D54;
    --navy:#050B14; --navy-2:#0A1725; --navy-3:#12293F;
    --brand:#8AAAE0; --brand-dark:#6E90CB; --brand-soft:#15243A;
    --s1:#49C9A0; --s1-soft:#0C2A22;
    --s2:#D5A45E; --s2-soft:#2A2010;
    --s3:#8AAAE0; --s3-soft:#15243A;
    --gold:#DDBB68;
    --sh-1:0 1px 2px rgba(0,0,0,.5), 0 6px 18px -12px rgba(0,0,0,.9);
    --sh-2:0 2px 4px rgba(0,0,0,.55), 0 18px 40px -22px rgba(0,0,0,1);
  }
}
:root[data-theme="dark"]{
  --bg:#070E18; --bg-alt:#0C1724; --surface:#0F1C2C;
  --ink:#E9EFF6; --ink-2:#C3D1E0; --muted:#8699AE;
  --line:#1C2B3D; --line-2:#2A3D54;
  --navy:#050B14; --navy-2:#0A1725; --navy-3:#12293F;
  --brand:#8AAAE0; --brand-dark:#6E90CB; --brand-soft:#15243A;
  --s1:#49C9A0; --s1-soft:#0C2A22;
  --s2:#D5A45E; --s2-soft:#2A2010;
  --s3:#8AAAE0; --s3-soft:#15243A;
  --gold:#DDBB68;
  --sh-1:0 1px 2px rgba(0,0,0,.5), 0 6px 18px -12px rgba(0,0,0,.9);
  --sh-2:0 2px 4px rgba(0,0,0,.55), 0 18px 40px -22px rgba(0,0,0,1);
}

/* ============ Nền tảng ============ */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{animation-duration:.001ms!important;transition-duration:.001ms!important}
}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5{margin:0;line-height:1.2;letter-spacing:-.02em;text-wrap:balance}
p{margin:0}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:3px solid var(--brand);outline-offset:2px;border-radius:3px}
.num{font-variant-numeric:tabular-nums}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 var(--gut)}
.skip{position:absolute;left:-9999px;top:0;background:var(--brand);color:#fff;padding:10px 16px;z-index:999}
.skip:focus{left:8px;top:8px}

.eyebrow{
  font-size:11.5px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;
  color:var(--brand);display:inline-block;margin-bottom:12px;
}
.eyebrow.s1{color:var(--s1)} .eyebrow.s2{color:var(--s2)} .eyebrow.s3{color:var(--s3)}
.eyebrow.on-navy{color:var(--gold)}

/* ============ Nút ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 24px;border-radius:var(--r-s);font-weight:600;font-size:15px;
  border:1.5px solid transparent;cursor:pointer;transition:transform .15s,box-shadow .15s,background .15s;
  text-decoration:none;white-space:nowrap;line-height:1.3;
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--brand-dark);box-shadow:var(--sh-2)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line-2)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-on-navy{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.28);backdrop-filter:blur(6px)}
.btn-on-navy:hover{background:rgba(255,255,255,.18)}
.btn-gold{background:var(--gold);color:#1B1403}
.btn-gold:hover{filter:brightness(1.07)}
.btn-s1{background:var(--s1);color:#fff} .btn-s2{background:var(--s2);color:#fff} .btn-s3{background:var(--s3);color:#fff}
.btn-lg{padding:16px 30px;font-size:16.5px}
.btn-sm{padding:9px 16px;font-size:14px}
.btn-block{width:100%}

/* ============ Thanh trên + Header ============ */
.topbar{background:var(--navy);color:var(--on-navy-2);font-size:13px}
.topbar .wrap{display:flex;flex-wrap:wrap;gap:8px 26px;align-items:center;justify-content:space-between;padding-top:9px;padding-bottom:9px}
.topbar a{color:var(--on-navy);font-weight:500}
.topbar .tb-left{display:flex;flex-wrap:wrap;gap:8px 22px;align-items:center}
.topbar .sep{opacity:.35}

.site-header{
  position:sticky;top:0;z-index:100;background:var(--surface);
  border-bottom:1px solid var(--line);
}
.site-header .wrap{display:flex;align-items:center;gap:18px;padding-top:13px;padding-bottom:13px}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand img{height:38px;width:auto}
.brand-txt{display:flex;flex-direction:column;line-height:1.1}
.brand-txt b{font-size:19px;font-weight:800;letter-spacing:-.03em;color:var(--ink)}
.brand-txt span{font-size:10.5px;color:var(--muted);letter-spacing:.06em}

.nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav a{
  padding:9px 13px;border-radius:var(--r-s);color:var(--ink-2);
  font-weight:500;font-size:15px;white-space:nowrap;
}
.nav a:hover{background:var(--bg-alt);color:var(--ink);text-decoration:none}
.nav a[aria-current="page"]{color:var(--brand);background:var(--brand-soft);font-weight:600}
.hdr-cta{display:flex;align-items:center;gap:10px;flex-shrink:0}
.hdr-phone{display:flex;flex-direction:column;line-height:1.15;text-align:right}
.hdr-phone span{font-size:10.5px;color:var(--muted);letter-spacing:.07em;text-transform:uppercase}
.hdr-phone b{font-size:16px;font-weight:700;color:var(--ink);font-variant-numeric:tabular-nums}

.burger{
  display:none;width:42px;height:42px;border:1px solid var(--line-2);background:var(--surface);
  border-radius:var(--r-s);cursor:pointer;align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.burger i{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px}

@media (max-width:1020px){
  .nav{
    display:none;position:absolute;top:100%;left:0;right:0;background:var(--surface);
    border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;
    padding:10px var(--gut) 18px;gap:2px;box-shadow:var(--sh-2);
  }
  .nav.open{display:flex}
  .nav a{padding:13px 12px;font-size:16px}
  .burger{display:flex;margin-left:auto}
  .hdr-cta .btn{display:none}
  .hdr-phone{display:none}
}

/* ============ Hero ============ */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background:
    radial-gradient(1100px 520px at 78% -10%, rgba(27,95,224,.42), transparent 62%),
    radial-gradient(760px 480px at 8% 108%, rgba(14,143,107,.28), transparent 60%),
    linear-gradient(160deg, var(--navy-3) 0%, var(--navy-2) 42%, var(--navy) 100%);
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:58px 58px;
  mask-image:radial-gradient(900px 500px at 70% 0%,#000,transparent 72%);
  -webkit-mask-image:radial-gradient(900px 500px at 70% 0%,#000,transparent 72%);
}
.hero .wrap{position:relative;z-index:1;padding-top:76px;padding-bottom:64px}
.hero h1{
  font-size:clamp(33px,5.4vw,58px);font-weight:800;letter-spacing:-.035em;
  line-height:1.06;max-width:17ch;
}
.hero h1 .hl{
  background:linear-gradient(100deg,var(--gold),#F2DCA4);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero .sub{margin-top:20px;font-size:clamp(16px,1.8vw,19px);color:var(--on-navy-2);max-width:56ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}

.hero-stats{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));
  gap:1px;margin-top:48px;background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.14);border-radius:var(--r);overflow:hidden;
}
.hero-stats div{background:rgba(10,26,47,.72);padding:17px 19px;backdrop-filter:blur(4px)}
.hero-stats .v{font-size:27px;font-weight:800;letter-spacing:-.03em;color:#fff;font-variant-numeric:tabular-nums;line-height:1.1}
.hero-stats .l{font-size:12.5px;color:var(--on-navy-2);margin-top:3px;line-height:1.4}

/* ============ Khối chung ============ */
.sec{padding:72px 0}
.sec.alt{background:var(--bg-alt)}
.sec.navy{background:var(--navy);color:#fff}
.sec.navy .sec-title{color:#fff}
.sec.navy .sec-lead{color:var(--on-navy-2)}
.sec-head{max-width:70ch;margin-bottom:34px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-title{font-size:clamp(25px,3.6vw,38px);font-weight:800;letter-spacing:-.03em;color:var(--ink)}
.sec-lead{margin-top:13px;font-size:17px;color:var(--ink-2)}

.grid{display:grid;gap:18px}
.g-2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.g-3{grid-template-columns:repeat(auto-fit,minmax(290px,1fr))}
.g-4{grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}
/* Khoá cột ở màn hình rộng để không bị lẻ hàng */
@media (min-width:980px){
  .g-2{grid-template-columns:repeat(2,1fr)}
  .g-3{grid-template-columns:repeat(3,1fr)}
  .contact-grid{grid-template-columns:1.02fr .98fr}
  .courses{grid-template-columns:repeat(3,1fr)}
}

/* ============ Thẻ 3 sàn ============ */
.floors{display:grid;grid-template-columns:repeat(auto-fit,minmax(310px,1fr));gap:20px}
.floor{
  position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-l);overflow:hidden;display:flex;flex-direction:column;
  box-shadow:var(--sh-1);transition:transform .18s,box-shadow .18s,border-color .18s;
}
.floor:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--c)}
.floor .cap{height:5px;background:var(--c)}
.floor .ic{
  width:54px;height:54px;border-radius:var(--r);background:var(--c-soft);
  display:flex;align-items:center;justify-content:center;margin-bottom:17px;
}
.floor .ic svg{width:28px;height:28px;stroke:var(--c);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.floor .body{padding:26px 25px 22px;display:flex;flex-direction:column;flex:1}
.floor .tag{
  font-size:11px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--c);margin-bottom:9px;
}
.floor h3{font-size:22px;font-weight:800;letter-spacing:-.028em;margin-bottom:10px}
.floor p.d{font-size:15px;color:var(--ink-2);margin-bottom:17px}
.floor ul{list-style:none;margin:0 0 22px;padding:0;display:grid;gap:9px}
.floor li{display:flex;gap:10px;font-size:14.5px;color:var(--ink-2);line-height:1.5}
.floor li::before{
  content:"";flex:0 0 auto;width:7px;height:7px;border-radius:2px;
  background:var(--c);margin-top:8px;
}
.floor .acts{margin-top:auto;display:flex;flex-wrap:wrap;gap:10px}
.floor-1{--c:var(--s1);--c-soft:var(--s1-soft)}
.floor-2{--c:var(--s2);--c-soft:var(--s2-soft)}
.floor-3{--c:var(--s3);--c-soft:var(--s3-soft)}

/* ============ Thẻ thường ============ */
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  padding:24px 23px;box-shadow:var(--sh-1);
}
.card h3{font-size:18px;font-weight:700;margin-bottom:8px}
.card h4{font-size:16.5px;font-weight:700;margin-bottom:7px}
.card p{font-size:14.8px;color:var(--ink-2)}
.card .n{
  width:36px;height:36px;border-radius:9px;background:var(--brand-soft);color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:15px;margin-bottom:14px;
}
.card ul{margin:11px 0 0;padding-left:19px;font-size:14.5px;color:var(--ink-2)}
.card li{margin-bottom:7px}
.card li:last-child{margin-bottom:0}

/* ============ Khoá học ============ */
.courses{display:grid;grid-template-columns:repeat(auto-fit,minmax(272px,1fr));gap:16px}
.course{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  padding:21px 21px 19px;display:flex;flex-direction:column;transition:border-color .16s,box-shadow .16s;
}
.course:hover{border-color:var(--s3);box-shadow:var(--sh-1)}
.course .pill{
  align-self:flex-start;font-size:10.5px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;
  padding:4px 9px;border-radius:4px;background:var(--s3-soft);color:var(--s3);margin-bottom:12px;
}
.course .pill.hot{background:var(--s2-soft);color:var(--s2)}
.course .pill.new{background:var(--s1-soft);color:var(--s1)}
.course h4{font-size:17px;font-weight:700;letter-spacing:-.02em;margin-bottom:8px;line-height:1.32}
.course p{font-size:14.2px;color:var(--ink-2);margin-bottom:15px}
.course .meta{display:flex;flex-wrap:wrap;gap:6px 14px;font-size:12.8px;color:var(--muted);margin-bottom:15px}
.course .foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:14px;border-top:1px solid var(--line)}
.course .price{font-size:19px;font-weight:800;color:var(--ink);font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.course .price small{display:block;font-size:11.5px;font-weight:500;color:var(--muted);letter-spacing:0}

/* ============ Bảng ============ */
.tblwrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:var(--surface)}
table{width:100%;border-collapse:collapse;font-size:14.6px;min-width:560px}
thead th{
  text-align:left;padding:13px 16px;background:var(--bg-alt);color:var(--muted);
  font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
  border-bottom:1px solid var(--line-2);white-space:nowrap;
}
tbody td{padding:13px 16px;border-bottom:1px solid var(--line);color:var(--ink-2);vertical-align:top}
tbody tr:last-child td{border-bottom:0}
tbody td:first-child{color:var(--ink);font-weight:600}
td.n,th.n{text-align:right;font-variant-numeric:tabular-nums}

/* ============ Dải logo ============ */
.logos{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.logos span{
  padding:11px 20px;border:1px solid var(--line);border-radius:var(--r-s);
  background:var(--surface);font-weight:700;font-size:14px;color:var(--ink-2);letter-spacing:.06em;
}
.sec.navy .logos span{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.16);color:#fff}

/* ============ Dải CTA ============ */
.cta-band{
  background:linear-gradient(135deg,var(--navy-3),var(--navy));color:#fff;
  border-radius:var(--r-l);padding:44px 40px;display:flex;flex-wrap:wrap;
  gap:26px;align-items:center;justify-content:space-between;box-shadow:var(--sh-2);
}
.cta-band h2{font-size:clamp(22px,2.8vw,30px);font-weight:800;letter-spacing:-.03em;max-width:22ch}
.cta-band p{margin-top:10px;color:var(--on-navy-2);max-width:52ch;font-size:15.5px}
.cta-band .acts{display:flex;flex-wrap:wrap;gap:12px}

/* ============ Form ============ */
.form{display:grid;gap:15px}
.field{display:grid;gap:6px}
.field label{font-size:13.5px;font-weight:600;color:var(--ink)}
.field .req{color:#C0392B}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border:1.5px solid var(--line-2);border-radius:var(--r-s);
  background:var(--surface);color:var(--ink);font-family:inherit;font-size:15px;
}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand);outline:none}
.field textarea{min-height:110px;resize:vertical}
.field .hint{font-size:12.5px;color:var(--muted)}
.form-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:15px}
.form-note{font-size:13px;color:var(--muted)}

/* ============ Liên hệ ============ */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:20px}
.contact-list{list-style:none;margin:0;padding:0;display:grid;gap:17px}
.contact-list li{display:flex;gap:14px;align-items:flex-start}
.contact-list .ci{
  flex:0 0 auto;width:40px;height:40px;border-radius:10px;background:var(--brand-soft);
  display:flex;align-items:center;justify-content:center;
}
.contact-list .ci svg{width:20px;height:20px;stroke:var(--brand);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.contact-list .lab{font-size:12px;color:var(--muted);letter-spacing:.08em;text-transform:uppercase;font-weight:600}
.contact-list .val{font-size:16px;font-weight:600;color:var(--ink);word-break:break-word}
.contact-list .val a{color:var(--ink)}

/* ============ Footer ============ */
.site-footer{background:var(--navy);color:var(--on-navy-2);padding:54px 0 0;margin-top:0}
.foot-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:34px}
@media (max-width:860px){.foot-grid{grid-template-columns:repeat(auto-fit,minmax(190px,1fr))}}
.site-footer h4{color:#fff;font-size:13px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;margin-bottom:15px}
.site-footer ul{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.site-footer a{color:var(--on-navy-2);font-size:14.5px}
.site-footer a:hover{color:#fff}
.foot-brand img{height:40px;margin-bottom:15px}
.foot-brand p{font-size:14.5px;max-width:38ch;color:var(--on-navy-2)}
.foot-bottom{
  margin-top:42px;border-top:1px solid rgba(255,255,255,.12);padding:20px 0 26px;
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;font-size:13.5px;
}

/* ============ Nút nổi ============ */
.fab{position:fixed;right:17px;bottom:17px;z-index:90;display:flex;flex-direction:column;gap:10px}
.fab a{
  width:52px;height:52px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-2);color:#fff;font-weight:700;font-size:12px;
}
.fab .zalo{background:#0068FF}
.fab .tel{background:var(--s1)}
.fab svg{width:24px;height:24px;stroke:#fff;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}

/* ============ Vụn ============ */
.badge{
  display:inline-flex;align-items:center;gap:7px;padding:6px 12px;border-radius:99px;
  background:var(--brand-soft);color:var(--brand);font-size:13px;font-weight:600;
}
.badge.on-navy{background:rgba(255,255,255,.1);color:#fff}
.note-box{
  border-left:3px solid var(--brand);background:var(--brand-soft);
  padding:16px 20px;border-radius:0 var(--r-s) var(--r-s) 0;color:var(--ink-2);font-size:15px;
}
.note-box b{color:var(--ink)}
.crumb{font-size:13.5px;color:var(--muted);padding:16px 0 0}
.crumb a{color:var(--muted)}
.lead-page{padding:52px 0 10px}
.lead-page h1{font-size:clamp(29px,4.6vw,46px);font-weight:800;letter-spacing:-.033em}
.lead-page .sub{margin-top:15px;font-size:17.5px;color:var(--ink-2);max-width:62ch}

@media (max-width:620px){
  .sec{padding:54px 0}
  .hero .wrap{padding-top:52px;padding-bottom:46px}
  .cta-band{padding:30px 24px}
  .floor .body{padding:22px 20px 20px}
}

/* ---- Khoá cột khoá học ở màn hình rộng (đặt cuối để thắng cascade) ---- */
@media (min-width:980px){
  .courses{grid-template-columns:repeat(3,1fr)}
}