/* Bộ màu, chữ lấy theo Trang.html hiện tại (nền giấy ấm, màu chỉ cho ngoại lệ). */
:root{color-scheme:light;--page:#f9f9f7;--mat:#fcfcfb;--mat2:#f1f0ec;--muc:#0b0b0b;--muc2:#52514e;--muc3:#6b6a66;
  --luoi:#e1e0d9;--truc:#c3c2b7;--vien:rgba(11,11,11,.10);--nhan:#2a78d6;--nhan-chu:#1a5fb4;--do:#d03b3b;--do-chu:#c0261e;
  --vang:#fab219;--vang-chu:#7a5000;--xanh-chu:#006300;--toi:#0f2a4e;--vang-tr:#e7b91f;--hover:rgba(11,11,11,.04);--nen-xanh:#eaf1fb}
@media (prefers-color-scheme:dark){:root{color-scheme:dark;--page:#0d0d0d;--mat:#1a1a19;--mat2:#232321;--muc:#fff;--muc2:#c3c2b7;
  --muc3:#a8a69f;--luoi:#2c2c2a;--truc:#383835;--vien:rgba(255,255,255,.10);--nhan:#3987e5;--nhan-chu:#7cb2f0;--do-chu:#f4796b;
  --vang-chu:#f0b429;--xanh-chu:#4ade80;--toi:#0f2a4e;--hover:rgba(255,255,255,.06);--nen-xanh:#16263b}}
*{box-sizing:border-box}
[hidden]{display:none!important}
body{margin:0;background:var(--page);color:var(--muc);font:14px/1.5 system-ui,-apple-system,"Segoe UI",sans-serif}
h1{font-size:20px;margin:0}
h2{font-size:16px;margin:0}
a{color:var(--nhan-chu)}
.phu{color:var(--muc3);font-size:13px}
.an{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.logo-khien{width:auto;height:40px;display:block}
.logo{width:36px;height:36px;border-radius:8px;background:var(--toi);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:12px;flex:none}
.hieu{display:flex;gap:12px;align-items:center}
.hieu span:last-child{display:flex;flex-direction:column}
.hieu small{color:var(--muc3);font-size:12px}
input,select,textarea{font:inherit;color:var(--muc);background:var(--mat);border:1px solid var(--truc);border-radius:8px;padding:9px 11px;width:100%}
input[readonly]{background:var(--mat2);color:var(--muc2)}
input[type=checkbox]{width:auto}
label{display:flex;flex-direction:column;gap:5px;font-size:13px;color:var(--muc2)}
label.hang{flex-direction:row;align-items:center;gap:8px}
.nut{font:inherit;cursor:pointer;background:var(--mat);color:var(--muc);border:1px solid var(--vien);border-radius:8px;padding:9px 14px;min-height:40px}
.nut:hover{background:var(--hover)}
.nut.chinh{background:var(--nhan);color:#fff;border-color:transparent;font-weight:600}
.nut.chinh:hover{filter:brightness(1.07)}
.nut.xau{color:var(--do-chu);border-color:color-mix(in srgb,var(--do) 40%,transparent)}
.nut.nho{padding:5px 11px;min-height:32px;font-size:13px}
.nut:disabled{opacity:.6;cursor:progress}
.bao{border-radius:8px;padding:9px 12px;font-size:13px;background:var(--mat2);color:var(--muc2)}
.bao.loi{background:color-mix(in srgb,var(--do) 12%,var(--mat));color:var(--do-chu)}
.bao.ok{background:color-mix(in srgb,#0ca30c 10%,var(--mat));color:var(--xanh-chu)}
.goi-y{font-size:12px;color:var(--muc3);margin-top:-6px}
.goi-y.dat{color:var(--xanh-chu)}

/* Màn hình vào: nửa trái màu nhận diện Trường (xanh tím than, vàng của logo), nửa phải là khung đăng nhập. */
.khung-vao{min-height:100vh;display:grid;grid-template-columns:minmax(360px,5fr) minmax(0,6fr)}
.vao-trai{position:relative;overflow:hidden;background:#0f2a4e;color:#e9edf3;display:flex;flex-direction:column;justify-content:space-between;gap:32px;
  padding:48px max(48px,env(safe-area-inset-left)) 32px}
/* Dải sọc mảnh ở góc dưới, gợi các vạch trên khiên logo. Chỉ để trang trí. */
.vao-trai::after{content:"";position:absolute;right:-60px;bottom:-60px;width:340px;height:340px;opacity:.16;pointer-events:none;
  background:repeating-linear-gradient(90deg,#e7b91f 0 3px,transparent 3px 14px);border-radius:50%;
  -webkit-mask:radial-gradient(circle,#000 55%,transparent 72%);mask:radial-gradient(circle,#000 55%,transparent 72%)}
.vao-trai::before{content:"";position:absolute;left:0;right:0;top:0;height:4px;background:linear-gradient(90deg,#e7b91f,#f3d77a 50%,#e7b91f)}
.logo-ngang{width:min(420px,100%);height:auto;display:block}
.vao-gioi-thieu{max-width:460px;display:flex;flex-direction:column;gap:14px;position:relative;z-index:1}
.vao-gioi-thieu h1{font-size:30px;line-height:1.25;color:#fff;letter-spacing:-.01em}
.vao-gioi-thieu p{margin:0;color:#c9d3e0;line-height:1.65}
.vao-diem{list-style:none;margin:6px 0 0;padding:0;display:flex;flex-direction:column;gap:12px}
.vao-diem li{display:flex;gap:12px;align-items:flex-start;color:#e9edf3}
.vao-diem svg{flex:none;width:30px;height:30px;padding:6px;border-radius:8px;background:rgba(231,185,31,.14);fill:none;stroke:#e7b91f;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.vao-diem span{padding-top:4px}
.vao-chan{margin:0;font-size:12px;color:#9fb0c5;position:relative;z-index:1}
.vao-phai{display:flex;align-items:center;justify-content:center;padding:40px max(16px,env(safe-area-inset-right)) 40px 16px;background:var(--page)}
.man-vao{width:100%;display:flex;justify-content:center}
.the-vao{width:420px;max-width:100%;background:var(--mat);border:1px solid var(--vien);border-radius:16px;padding:32px;display:flex;flex-direction:column;gap:14px;
  box-shadow:0 1px 2px rgba(0,0,0,.04),0 12px 32px rgba(15,42,78,.08)}
.the-vao h2{font-size:24px;margin:0}
.the-vao p{margin:0;line-height:1.6}
.vao-nho{font-size:12px;color:var(--muc3);letter-spacing:.02em}
.the-vao .nut.chinh{background:#0f2a4e;min-height:44px}
:root .the-vao .nut.chinh:hover{filter:none;background:#183b68}
.the-vao input:focus,.the-vao .nut:focus-visible{outline:2px solid #e7b91f;outline-offset:1px}
.nut-google{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:44px}
.hang-link{display:flex;justify-content:space-between;font-size:13px}
.hoac{display:flex;align-items:center;gap:10px;color:var(--muc3);font-size:12px}
.hoac::before,.hoac::after{content:"";flex:1;height:1px;background:var(--luoi)}
.buoc{list-style:none;margin:0;padding:0;display:flex;gap:6px;counter-reset:b}
.buoc li{counter-increment:b;flex:1;font-size:12px;color:var(--muc3);padding-top:8px;border-top:3px solid var(--luoi)}
.buoc li::before{content:counter(b) ". "}
.buoc li.xong{border-color:#0f2a4e;color:var(--muc2)}
.buoc li.dang{border-color:#e7b91f;color:var(--muc);font-weight:600}
.huy-hieu{align-self:flex-start;font-size:12px;font-weight:600;border-radius:99px;padding:3px 10px}
.huy-hieu.vang{background:color-mix(in srgb,#e7b91f 20%,var(--mat));color:var(--vang-chu)}
.huy-hieu.do{background:color-mix(in srgb,var(--do) 14%,var(--mat));color:var(--do-chu)}
@media (max-width:900px){
  .khung-vao{grid-template-columns:minmax(0,1fr)}
  .vao-trai{padding:24px 20px;gap:16px}
  .vao-trai::after,.vao-diem,.vao-gioi-thieu p,.vao-chan{display:none}
  .logo-ngang{width:min(300px,100%)}
  .vao-gioi-thieu h1{font-size:20px}
  .vao-phai{align-items:flex-start;padding-top:24px}
  .the-vao{padding:22px}
}

/* Khung sau khi vào */
.dau{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;padding:12px max(24px,env(safe-area-inset-right)) 12px max(24px,env(safe-area-inset-left));border-bottom:1px solid var(--luoi)}
.nguoi{display:flex;gap:12px;align-items:center}
.nguoi span{display:flex;flex-direction:column;text-align:right}
.nguoi small{color:var(--muc3);font-size:12px}
.dieu-huong{display:flex;flex-wrap:wrap;gap:4px;align-items:center;margin:12px max(24px,env(safe-area-inset-left)) 0;padding:3px;background:var(--mat2);border:1px solid var(--vien);border-radius:10px;width:fit-content;max-width:calc(100% - 32px)}
.dieu-huong button{font:inherit;border:0;background:transparent;color:var(--muc2);padding:6px 12px;border-radius:7px;cursor:pointer}
.dieu-huong button[aria-current=page]{background:var(--mat);color:var(--muc);font-weight:600;box-shadow:0 1px 2px rgba(0,0,0,.08)}
.dieu-huong .vach{width:1px;height:18px;background:var(--truc);margin:0 4px}
.dieu-huong .nhom-ten{font-size:11px;color:var(--muc3);padding:0 4px}
.noi-dung{padding:16px max(24px,env(safe-area-inset-right)) 48px max(24px,env(safe-area-inset-left));max-width:1440px}
.the{background:var(--mat);border:1px solid var(--vien);border-radius:14px;padding:18px}
.quyen-cua-toi{background:var(--mat2);border-radius:10px;padding:12px 14px;margin:12px 0;max-width:720px}
.quyen-cua-toi p{margin:6px 0 0;color:var(--muc2)}
.dau-trang{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;margin-bottom:12px}
.hang-nut{display:flex;flex-wrap:wrap;gap:8px;justify-content:flex-end}
.loc{display:flex;flex-wrap:wrap;gap:6px;margin:12px 0}
.the-loc{font:inherit;font-size:12.5px;cursor:pointer;background:var(--mat);color:var(--muc2);border:1px solid var(--vien);border-radius:99px;padding:4px 12px}
.the-loc.dang{background:var(--muc);color:var(--page);border-color:var(--muc);font-weight:600}
.the-loc.can:not(.dang){color:var(--vang-chu);border-color:color-mix(in srgb,var(--vang) 70%,transparent);font-weight:600}
.bang-bao{padding:0;overflow:hidden}
.tim{padding:10px 14px;border-bottom:1px solid var(--luoi)}
.tim input{border:0;background:transparent;padding:4px 0}
.cuon{overflow-x:auto}
table{width:100%;border-collapse:collapse;min-width:620px;font-size:13px}
th{text-align:left;font-weight:600;font-size:12px;color:var(--muc3);padding:8px 14px;border-bottom:1px solid var(--luoi)}
td{padding:10px 14px;border-bottom:1px solid var(--luoi);vertical-align:top}
tbody tr[data-mo]{cursor:pointer}
tbody tr[data-mo]:hover,tbody tr[data-mo]:focus{background:var(--hover);outline:none}
tbody tr.dang{background:var(--nen-xanh)}
td .phu{font-size:12px}
td.canh,.canh{color:var(--vang-chu);font-weight:600}
td.xau{color:var(--do-chu)}
td.trong{text-align:center;color:var(--muc3);padding:24px}
.chan-bang{padding:10px 14px}

/* Ngăn trượt cạnh phải */
dialog{border:0;padding:0;background:var(--mat);color:var(--muc)}
dialog::backdrop{background:rgba(0,0,0,.18)}
.ngan[open]{margin:0 0 0 auto;width:min(100vw,520px);max-width:100vw;height:100vh;max-height:100vh;border-left:1px solid var(--vien);
  box-shadow:-16px 0 48px rgba(0,0,0,.14);border-radius:16px 0 0 16px;animation:ngan-vao .2s cubic-bezier(.16,1,.3,1)}
@keyframes ngan-vao{from{transform:translateX(40px);opacity:.4}to{transform:none;opacity:1}}
@media (prefers-reduced-motion:reduce){.ngan[open]{animation:none}}
.ngan form{display:flex;flex-direction:column;height:100%}
.ngan-dau{display:flex;justify-content:space-between;gap:10px;align-items:flex-start;padding:14px 22px;border-bottom:1px solid var(--luoi)}
.ngan-dau span{display:flex;flex-direction:column}
.ngan-dau b{font-size:17px}
.ngan-dau small{color:var(--muc3);font-size:12px}
.ngan-than{flex:1;overflow:auto;padding:18px 22px;display:flex;flex-direction:column;gap:14px}
.hai-cot{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.giai-thich{margin:0;background:var(--mat2);border-radius:10px;padding:12px 14px;color:var(--muc2);line-height:1.6;font-size:13px}
.nk-nguoi{font-size:12.5px;color:var(--muc2);display:flex;flex-direction:column;gap:4px;border-top:1px solid var(--luoi);padding-top:10px}
.nk-nguoi:empty{display:none}
.hop[open]{width:min(640px,94vw);border-radius:14px;padding:20px;display:flex;flex-direction:column;gap:12px}
.hop textarea{font-family:ui-monospace,monospace;font-size:12.5px}
.hop ul{margin:4px 0;padding-left:18px;font-size:12.5px}
@media (max-width:600px){.hai-cot{grid-template-columns:1fr}.nguoi span{text-align:left}}

/* Trang chủ, quản trị bổ sung (bước F1b) */
.the-chu{border-top:3px solid #e7b91f}
.chan-bang{display:flex;flex-wrap:wrap;gap:8px;align-items:center;justify-content:space-between}
.phan-trang{display:flex;flex-wrap:wrap;gap:4px}
.phan-trang .nut.dang{background:var(--muc);color:var(--page);border-color:var(--muc)}
.phan-trang .nut:disabled{opacity:.4;cursor:default}
.kiem{border:1px solid var(--luoi);border-radius:10px;padding:10px 12px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 12px;margin:0}
.hang-nut.trai{justify-content:flex-start}
.hang-them{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:12px 0}
.hang-them label{flex:1 1 260px}
.hang-them.nho{margin:8px 0 0}
.hang-them.nho input{padding:6px 10px}
.dv-ds{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:12px}
.dv-the{display:flex;flex-direction:column;gap:8px;padding:14px 16px}
.dv-dau{display:flex;gap:8px;align-items:baseline;justify-content:space-between}
.dv-dau b{font-size:15px}
.dv-lv{display:flex;flex-wrap:wrap;gap:6px}
.chip{display:inline-flex;align-items:center;gap:4px;font-size:12.5px;background:var(--mat2);border:1px solid var(--vien);border-radius:99px;padding:3px 6px 3px 10px}
.chip button{border:0;background:transparent;color:var(--muc3);cursor:pointer;font:inherit;padding:0 4px}
.chip button:hover{color:var(--do-chu)}
.luoi-ch{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:14px}
.luoi-ch .the{display:flex;flex-direction:column;gap:10px}
.ch-chep dl{display:grid;grid-template-columns:auto 1fr;gap:4px 14px;margin:0;font-size:13.5px}
.ch-chep dt{color:var(--muc3)}
.ch-chep dd{margin:0}
.trong{text-align:center;color:var(--muc3)}