/* Trang đăng nhập Gemtech Education — mẫu A (chia đôi màn hình) */
.gt-login{
  --brand:#E4572E;--brand-d:#C8431D;--brand-soft:#FDEDE6;
  --ink:#24262B;--ink-2:#5C6068;--ink-3:#8D9199;
  --line:#E6E3E0;--ground:#FBFAF8;--night:#1F2127;--night-2:#2B2E36;
  margin:0;min-height:100vh;font-family:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;color:var(--ink);background:var(--ground);-webkit-font-smoothing:antialiased}
.gt-login *{box-sizing:border-box}
.gt{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);min-height:100vh}

/* Bên trái: khối thương hiệu */
.gt-side{position:relative;overflow:hidden;background:var(--night);color:#fff;padding:48px 56px;display:flex;flex-direction:column;justify-content:space-between;gap:40px}
.gt-facets{position:absolute;right:-120px;bottom:-80px;width:760px;max-width:none;opacity:.95;pointer-events:none}
.gt-glow{position:absolute;left:-200px;top:-200px;width:560px;height:560px;border-radius:50%;background:radial-gradient(closest-side,rgba(228,87,46,.28),transparent);pointer-events:none}
.gt-badge{position:relative;display:inline-flex;align-items:center;gap:10px;align-self:flex-start;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);padding:8px 14px 8px 8px;border-radius:999px;font-size:13px;font-weight:500;color:#F3E9E4}
.gt-badge i{width:26px;height:26px;border-radius:50%;background:var(--brand);display:grid;place-items:center;font-style:normal}
.gt-copy{position:relative;max-width:470px}
.gt-copy h2{font-size:44px;line-height:1.12;font-weight:800;letter-spacing:-.02em;margin:0 0 18px;text-wrap:balance}
.gt-copy h2 em{font-style:normal;color:#FF8A62}
.gt-copy p{font-size:16px;line-height:1.65;color:#C9CBD1;margin:0}
.gt-points{position:relative;display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.gt-points span{display:inline-flex;align-items:center;gap:8px;font-size:13.5px;color:#E7E8EB;background:var(--night-2);border:1px solid rgba(255,255,255,.07);padding:9px 14px;border-radius:12px}
.gt-points svg{width:16px;height:16px;color:#FF8A62}
.gt-foot{position:relative;font-size:13px;color:#8E929C}

/* Bên phải: biểu mẫu */
.gt-main{display:flex;flex-direction:column;padding:28px 40px}
.gt-top{display:flex;justify-content:space-between;align-items:center;gap:16px}
.gt-logo img{height:52px;width:auto;max-width:220px;object-fit:contain;display:block}
.gt-lang{display:inline-flex;background:#F1EFEC;border-radius:999px;padding:3px;gap:2px}
.gt-lang a{font-size:12.5px;font-weight:600;color:var(--ink-2);text-decoration:none;padding:6px 12px;border-radius:999px}
.gt-lang a[aria-current]{background:#fff;color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.08)}
.gt-form-wrap{flex:1;display:flex;align-items:center;justify-content:center;padding:32px 0}
.gt-form-shell{width:100%;max-width:400px}
.gt-form-shell h1{font-size:30px;font-weight:800;letter-spacing:-.02em;margin:0 0 6px}
.gt-sub{color:var(--ink-2);font-size:15px;margin:0 0 30px}
.gt-status{background:#E8F7EF;color:#176B3A;border-radius:12px;padding:11px 14px;font-size:14px;margin-bottom:16px}
.gt-errors{background:#FDECEC;color:#A32626;border-radius:12px;padding:11px 14px;font-size:14px;margin-bottom:16px;outline:none}
.gt-errors p{margin:0}
.gt-errors p+p{margin-top:4px}
.gt-field{margin-bottom:16px}
.gt-field label{display:block;font-size:13.5px;font-weight:600;margin-bottom:7px}
.gt-ctl{position:relative}
.gt-ic{position:absolute;left:14px;top:50%;transform:translateY(-50%);width:18px;height:18px;color:var(--ink-3);pointer-events:none}
.gt-ctl input{width:100%;height:50px;border:1.5px solid var(--line);border-radius:12px;background:#fff;padding:0 46px 0 44px;font:inherit;font-size:15px;color:var(--ink);transition:border-color .15s,box-shadow .15s}
.gt-ctl input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(228,87,46,.14)}
.gt-ctl input[aria-invalid=true]{border-color:#D94848}
.gt-eye{position:absolute;right:6px;top:50%;transform:translateY(-50%);width:38px;height:38px;border:0;background:none;border-radius:9px;color:var(--ink-3);cursor:pointer;display:grid;place-items:center}
.gt-eye:hover{background:#F4F2EF;color:var(--ink)}
.gt-eye svg{width:19px;height:19px}
.gt-row{display:flex;justify-content:space-between;align-items:center;gap:12px;margin:4px 0 22px;font-size:14px}
.gt-chk{display:inline-flex;align-items:center;gap:9px;cursor:pointer;color:var(--ink-2)}
.gt-chk input{width:18px;height:18px;accent-color:var(--brand);margin:0;border-radius:4px}
.gt-row a{color:var(--brand-d);font-weight:600;text-decoration:none}
.gt-row a:hover{text-decoration:underline}
.gt-btn{width:100%;height:52px;border:0;border-radius:12px;font:inherit;font-size:15.5px;font-weight:700;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:10px}
.gt-btn-main{background:var(--brand);color:#fff;box-shadow:0 8px 20px -8px rgba(228,87,46,.7);transition:background .15s,transform .1s}
.gt-btn-main:hover{background:var(--brand-d)}
.gt-btn-main:active{transform:translateY(1px)}
.gt-btn-main[disabled]{opacity:.75;cursor:progress}
.gt-btn-main svg{width:18px;height:18px;transition:transform .15s}
.gt-btn-main:hover svg{transform:translateX(3px)}
.gt-or{display:flex;align-items:center;gap:14px;color:var(--ink-3);font-size:13px;margin:22px 0}
.gt-or::before,.gt-or::after{content:"";flex:1;height:1px;background:var(--line)}
.gt-btn-g{background:#fff;border:1.5px solid var(--line);color:var(--ink);font-weight:600}
.gt-btn-g:not([disabled]):hover{background:#FAF9F7;border-color:#D7D3CF}
.gt-btn-g[disabled]{opacity:.6;cursor:not-allowed}
.gt-btn-g img{width:20px;height:20px}
.gt-app{margin-top:26px;display:flex;align-items:center;gap:14px;padding:14px 16px;border-radius:14px;background:var(--brand-soft);color:var(--ink);border:0;width:100%;font:inherit;cursor:pointer;text-align:left}
.gt-app:hover{background:#FBE3D8}
.gt-app-ico{width:40px;height:40px;border-radius:11px;background:#fff;display:grid;place-items:center;color:var(--brand);flex:none}
.gt-app-ico svg{width:20px;height:20px}
.gt-app b{font-size:14px}
.gt-app-go{margin-left:auto;color:var(--brand);width:18px;height:18px;flex:none}
.gt-mobile-foot{display:none;text-align:center;font-size:12.5px;color:var(--ink-3);margin:0}

@media (max-width:960px){
  .gt{grid-template-columns:1fr}
  .gt-side{display:none}
  .gt-main{padding:20px 16px}
  .gt-logo img{height:42px}
  .gt-form-shell h1{font-size:26px}
  .gt-mobile-foot{display:block}
}