/* NNG_HSNT — 3 trang phụ (đăng nhập, chưa có gói, quản trị). Tông XDV. Không dùng style nội tuyến. */
:root {
  --nen: #F8FAFC;
  --the: #FFFFFF;
  --chu: #0F172A;
  --chu-phu: #334155;
  --vien: #CBD5E1;
  --navy: #091524;
  --navy-2: #0F2550;
  --xanh: #2563EB;
  --xanh-dam: #1D4ED8;
  --xanh-nhat: #DBEAFE;
  --do: #B91C1C;
  --do-nhat: #FEE2E2;
  --luc: #166534;
  --luc-nhat: #DCFCE7;
  --vang: #854D0E;
  --vang-nhat: #FEF3C7;
  --bong: 0 1px 2px rgba(15, 23, 42, .06), 0 8px 24px rgba(15, 37, 80, .08);
}
@media (prefers-color-scheme: dark) {
  :root {
    --nen: #0A1222;
    --the: #111C33;
    --chu: #E2E8F0;
    --chu-phu: #A5B4CC;
    --vien: #2A3A5C;
    --xanh: #3B82F6;
    --xanh-dam: #60A5FA;
    --xanh-nhat: #172554;
    --do: #FCA5A5;
    --do-nhat: #3B1218;
    --luc: #86EFAC;
    --luc-nhat: #0F2A1B;
    --vang: #FCD34D;
    --vang-nhat: #33260A;
    --bong: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .35);
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--nen);
  color: var(--chu);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--xanh-dam); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--xanh); outline-offset: 2px; border-radius: 6px; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5rem; color: var(--chu); }
h1 { font-size: 1.5rem; }
h2 { font-size: 1.15rem; }
p { margin: 0 0 .75rem; color: var(--chu-phu); }

/* Logo luôn nằm trên thẻ trắng để đủ tương phản ở cả hai chế độ */
.logo-the {
  display: inline-flex; align-items: center; background: #fff; border-radius: 12px;
  padding: 8px 14px; box-shadow: var(--bong);
}
.logo-the img { display: block; height: 32px; width: auto; }

/* ---- Trang đăng nhập / chưa có gói ---- */
.khung-giua { min-height: 100vh; display: grid; place-items: center; padding: 24px 16px; }
.hop { width: 100%; max-width: 420px; }
.hop-dau { text-align: center; margin-bottom: 20px; }
.hop-dau h1 { margin-top: 14px; color: var(--chu); }
.hop-dau p { margin: 0; }
.the {
  background: var(--the); border: 1px solid var(--vien); border-radius: 16px; padding: 24px; box-shadow: var(--bong);
}
.truong { margin-bottom: 16px; }
.truong label { display: block; font-weight: 600; margin-bottom: 6px; color: var(--chu); font-size: .95rem; }
.truong input, .truong select {
  width: 100%; min-height: 44px; padding: 10px 12px; border: 1px solid var(--vien); border-radius: 12px;
  background: var(--the); color: var(--chu); font: inherit;
}
.truong input:focus, .truong select:focus { border-color: var(--xanh); }
.o-mat-khau { position: relative; }
.o-mat-khau input { padding-right: 84px; }
.o-mat-khau button {
  position: absolute; right: 6px; top: 6px; min-height: 32px; padding: 0 10px; border: 0; border-radius: 8px;
  background: transparent; color: var(--xanh-dam); font: inherit; font-weight: 600; cursor: pointer;
}
.nut {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 0 18px;
  border: 1px solid var(--xanh); border-radius: 12px; background: var(--xanh); color: #fff; font: inherit;
  font-weight: 600; cursor: pointer; text-decoration: none;
}
.nut:hover { background: var(--xanh-dam); border-color: var(--xanh-dam); }
.nut[disabled] { opacity: .6; cursor: progress; }
.nut-day { width: 100%; }
.nut-phu { background: transparent; color: var(--xanh-dam); border-color: var(--vien); }
.nut-phu:hover { background: var(--xanh-nhat); border-color: var(--xanh); }
.nut-nguy { background: var(--do-nhat); color: var(--do); border-color: var(--do); }
.nut-nguy:hover { background: var(--do); color: #fff; }
.nut-nho { min-height: 36px; padding: 0 12px; font-size: .9rem; border-radius: 10px; }
.thong-bao { padding: 10px 14px; border-radius: 12px; margin-bottom: 16px; border: 1px solid transparent; font-size: .95rem; }
.thong-bao.loi { background: var(--do-nhat); color: var(--do); border-color: var(--do); }
.thong-bao.ok { background: var(--luc-nhat); color: var(--luc); border-color: var(--luc); }
.thong-bao.tin { background: var(--xanh-nhat); color: var(--chu); border-color: var(--xanh); }
.duoi-the { margin-top: 16px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: .95rem; }
.ghi-chu { font-size: .875rem; color: var(--chu-phu); margin: 16px 0 0; }
.email-dang-nhap { font-weight: 600; color: var(--chu); word-break: break-all; }

/* ---- Đăng nhập Google ---- */
.khu-nut { display: flex; flex-direction: column; align-items: center; gap: 8px; min-height: 52px; padding: 4px 0 8px; }
.nut-google { display: flex; justify-content: center; min-height: 44px; max-height: 56px; width: 100%; overflow: hidden; color-scheme: light; }
/* CSP trang đăng nhập không cho style nội tuyến (SPEC 9.3): giữ khung nút Google trong kích thước an toàn dù Google không áp được style của nó. */
.nut-google iframe { border: 0; max-width: 100%; height: 44px; }
.nut-google svg { max-width: 24px; max-height: 24px; }
.giua { text-align: center; }
.dang-xu-ly {
  display: flex; align-items: center; justify-content: center; gap: 12px; min-height: 52px; padding: 4px 0 8px;
  color: var(--chu); font-weight: 600;
}
.quay {
  width: 22px; height: 22px; border-radius: 50%; border: 3px solid var(--vien); border-top-color: var(--xanh);
  animation: quay 0.9s linear infinite;
}
@keyframes quay { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .quay { animation-duration: 3s; } }
.khoi-thu { margin-top: 20px; padding-top: 16px; border-top: 1px dashed var(--vien); }
.khoi-thu h2 { font-size: 1rem; }
.ds-thu { list-style: none; margin: 8px 0 0; padding: 0; display: grid; gap: 6px; max-height: 260px; overflow: auto; }
.ds-thu li { display: flex; flex-direction: column; align-items: flex-start; gap: 2px; }
.nut-thu { min-height: 36px; text-align: left; word-break: break-all; }
.nhan-thu { font-size: .8rem; color: var(--chu-phu); }

/* ---- Trang quản trị ---- */
.thanh-tren { background: var(--navy); color: #fff; }
.thanh-tren-trong {
  max-width: 1120px; margin: 0 auto; padding: 12px 16px; display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
}
.thanh-tren h1 { color: #fff; font-size: 1.1rem; margin: 0; flex: 1 1 200px; }
.thanh-tren .nguoi { color: #CBD5E1; font-size: .9rem; word-break: break-all; }
.thanh-tren .nut-phu { color: #fff; border-color: #475A82; }
.thanh-tren .nut-phu:hover { background: var(--navy-2); border-color: #fff; }
main.quan-tri { max-width: 1120px; margin: 0 auto; padding: 20px 16px 64px; }
.khoi { background: var(--the); border: 1px solid var(--vien); border-radius: 16px; padding: 18px; margin-bottom: 20px; box-shadow: var(--bong); }
.khoi-dau { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.khoi-dau h2 { margin: 0; }
.luoi-form { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 12px 16px; align-items: end; }
.luoi-form .truong { margin: 0; }
.hang-nut { display: flex; gap: 8px; flex-wrap: wrap; }
table { width: 100%; border-collapse: collapse; font-size: .95rem; }
th { text-align: left; color: var(--chu-phu); font-weight: 600; font-size: .85rem; border-bottom: 2px solid var(--vien); padding: 8px 10px; }
td { padding: 10px; border-bottom: 1px solid var(--vien); vertical-align: middle; color: var(--chu); }
tr.dang-chon td { background: var(--xanh-nhat); }
.nhan { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: .8rem; font-weight: 600; }
.nhan.xanh { background: var(--luc-nhat); color: var(--luc); }
.nhan.vang { background: var(--vang-nhat); color: var(--vang); }
.nhan.do { background: var(--do-nhat); color: var(--do); }
.nhan.xam { background: var(--xanh-nhat); color: var(--chu); }
.rong { color: var(--chu-phu); padding: 14px 4px; }
td select { min-height: 36px; border: 1px solid var(--vien); border-radius: 10px; background: var(--the); color: var(--chu); font: inherit; padding: 0 8px; }
.chi-tiet-nk { font-size: .85rem; color: var(--chu-phu); word-break: break-word; }

dialog {
  border: 1px solid var(--vien); border-radius: 16px; background: var(--the); color: var(--chu); padding: 22px;
  width: min(440px, calc(100vw - 32px)); box-shadow: var(--bong);
}
dialog::backdrop { background: rgba(9, 21, 36, .6); }
dialog h2 { margin-bottom: .5rem; }
dialog .hang-nut { justify-content: flex-end; margin-top: 18px; }

@media (max-width: 720px) {
  .the { padding: 18px; }
  table, thead, tbody, tr, th, td { display: block; }
  thead { position: absolute; left: -9999px; }
  tr { border: 1px solid var(--vien); border-radius: 12px; margin-bottom: 12px; padding: 6px 10px; background: var(--the); }
  td { border: 0; padding: 6px 0; display: flex; justify-content: space-between; gap: 12px; align-items: center; text-align: right; }
  td::before { content: attr(data-nhan); color: var(--chu-phu); font-size: .85rem; text-align: left; flex: 0 0 38%; }
  td.hanh-dong { flex-wrap: wrap; justify-content: flex-end; }
  td.hanh-dong::before { flex-basis: 100%; }
  .thanh-tren-trong { gap: 10px; }
}
@media (prefers-reduced-motion: no-preference) {
  .nut, .truong input { transition: background-color .15s, border-color .15s; }
}