/* =====================================================================================
   ĐĂNG NHẬP / ĐĂNG KÝ TRANG TIN NỘI BỘ (/InternalLogin.aspx, /InternalRegister.aspx + bản mb) —
   20/10/2026, user: "style lại chuyên trang nội bộ" (ảnh thlongbien.hanoi.edu.vn/InternalLogin).
   Trước: khung viền mảnh, nhãn đậm, ảnh mã bảo vệ lưới xanh lá to hết khung, chữ lỗi đỏ trần.
   Nay: một thẻ bo góc giữa trang — đầu thẻ có biểu tượng khoá + tên đơn vị; ô nhập có biểu tượng,
   nút hiện/ẩn mật khẩu; mã bảo vệ chung `.qi-mbv` (qi-nut.css); nút chính trải hết bề ngang theo
   màu chủ đạo đơn vị (`--mau-md`); hộp báo lỗi; dòng chuyển Đăng nhập ⇄ Đăng ký.
   Mọi luật khoá trong `.qi-nb` để không đụng skin từng mẫu giao diện.
   ===================================================================================== */
.qi-nb {
    --nb-md: var(--mau-md, #0071a6);
    --nb-vien: #e2e8f0; --nb-mo: #64748b; --nb-chu: #0f172a;
    display: flex; justify-content: center; padding: 28px 10px 40px; color: #1f2937; font-size: 15px; line-height: 1.5;
}
.qi-nb *, .qi-nb *::before, .qi-nb *::after { box-sizing: border-box; }
.qi-nb__the {
    width: 100%; max-width: 460px; background: #fff; border: 1px solid var(--nb-vien); border-radius: 16px;
    padding: 28px 28px 24px; box-shadow: 0 10px 30px -12px rgba(15, 23, 42, .18), 0 1px 2px rgba(15, 23, 42, .04);
}
.qi-nb__the--rong { max-width: 760px; }
.qi-nb__dau { display: flex; flex-direction: column; align-items: center; text-align: center; gap: 6px; margin-bottom: 22px; }
.qi-nb__khoa {
    display: inline-flex; align-items: center; justify-content: center; width: 52px; height: 52px; border-radius: 14px;
    color: var(--nb-md); background: #eef4fb; background: color-mix(in srgb, var(--nb-md) 12%, #fff); margin-bottom: 6px;
}
.qi-nb__tieude { margin: 0; font-size: 22px; font-weight: 700; line-height: 1.3; color: var(--nb-chu); }
.qi-nb__phu { margin: 0; font-size: 14px; color: var(--nb-mo); }

.qi-nb__form { display: flex; flex-direction: column; gap: 16px; }
.qi-nb__luoi { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.qi-nb__o { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.qi-nb__o--rong { grid-column: 1 / -1; }
.qi-nb label, .qi-nb .qi-mbv > label { margin: 0; font-size: 14px; font-weight: 600; color: #334155; }
.qi-nb__bb { color: #dc2626; margin-left: 2px; }
.qi-nb__goiy { font-size: 12.5px; color: var(--nb-mo); }

.qi-nb__vo { position: relative; }
.qi-nb__vo > svg { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: #94a3b8; pointer-events: none; }
html body .qi-nb .form-control {
    height: 48px; padding: 0 14px; font-size: 15px; color: var(--nb-chu);
    border: 1px solid #cbd5e1; border-radius: 10px; background: #fff; box-shadow: none;
    transition: border-color .15s, box-shadow .15s;
}
html body .qi-nb .qi-nb__vo .form-control { padding-left: 42px; }
html body .qi-nb .qi-nb__vo--mk .form-control { padding-right: 48px; }
html body .qi-nb textarea.form-control { height: auto; min-height: 96px; padding: 12px 14px; resize: vertical; }
html body .qi-nb .form-control::placeholder { color: #94a3b8; }
html body .qi-nb .form-control:focus {
    border-color: var(--nb-md); outline: 0;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, .18); box-shadow: 0 0 0 3px color-mix(in srgb, var(--nb-md) 22%, transparent);
}
html body .qi-nb .form-control.la-sai { border-color: #dc2626; }
.qi-nb__mat {
    position: absolute; right: 6px; top: 50%; transform: translateY(-50%);
    display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px;
    border: 0; border-radius: 8px; background: transparent; color: var(--nb-mo); cursor: pointer;
}
.qi-nb__mat:hover { background: #f1f5f9; color: var(--nb-chu); }
.qi-nb__mat .an { display: none; }
.qi-nb__mat.dang-hien .hien { display: none; }
.qi-nb__mat.dang-hien .an { display: inline; }

.qi-nb .qi-mbv { margin: 0; display: flex; flex-direction: column; gap: 6px; }
.qi-nb .mx-2 { margin-left: 0 !important; margin-right: 0 !important; }      /* vỏ của _MaBaoVeNoiBo */
html body .qi-nb .qi-mbv__anh img, html body .qi-nb .qi-mbv__doi { border-radius: 10px; }

.qi-nb .qi-nb__nut {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px; width: 100%;
    height: 48px; padding: 0 22px; margin-top: 4px; border: 0; border-radius: 10px;
    background: var(--nb-md); color: #fff; font-size: 15.5px; font-weight: 600; cursor: pointer; transition: filter .15s;
}
.qi-nb .qi-nb__nut:hover { filter: brightness(.92); }
.qi-nb .qi-nb__nut:focus-visible { outline: 3px solid rgba(37, 99, 235, .35); outline-offset: 2px; }
.qi-nb .qi-nb__nut[disabled] { opacity: .7; cursor: progress; }
.qi-nb__chuyen { margin: 6px 0 0; text-align: center; font-size: 14px; color: var(--nb-mo); }
.qi-nb__chuyen a { font-weight: 600; color: var(--nb-md) !important; }

.qi-nb__tb { display: flex; align-items: flex-start; gap: 10px; padding: 12px 14px; border-radius: 10px; font-size: 14.5px; font-weight: 500; }
.qi-nb__tb svg { flex: 0 0 auto; margin-top: 1px; }
.qi-nb__tb--loi { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
.qi-nb__tb--ok { background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }

@media (max-width: 575.98px) {
    .qi-nb { padding: 14px 0 28px; }
    .qi-nb__the { padding: 22px 16px 18px; border-radius: 14px; box-shadow: 0 1px 2px rgba(15, 23, 42, .04); }
    .qi-nb__tieude { font-size: 19px; }
    .qi-nb__luoi { grid-template-columns: minmax(0, 1fr); gap: 14px; }
}