/* MedExam 115 — Admin & shared. Design tokens theo prototype đã duyệt. */
:root{
  --blue:#1d6ff2; --blue-d:#1660d6; --blue-b:#1a63d8;
  --navy:#0c2c54; --navy2:#0a2440;
  --ink:#111827; --ink2:#344054; --muted:#667085; --muted2:#98a2b3;
  --line:#e7eaf0; --line2:#eef1f5; --line3:#f2f4f7;
  --bg:#f3f5f9; --bg2:#eef1f6; --card:#fff; --soft:#f8fafc;
  --green:#16a34a; --green-b:#138a3f; --amber:#b86b14; --amber-bg:#fbf0df;
  --red:#d92d20; --red-bg:#fdeceb;
  --blue-soft:#e9f1ff; --radius:14px;
  --shadow-sm:0 1px 2px rgba(16,24,40,.04);
  --shadow:0 1px 2px rgba(16,24,40,.04),0 4px 14px rgba(16,24,40,.05);
  /* Thang khoảng cách & cỡ chữ dùng chung — thay cho việc mỗi màn hình tự đặt số lẻ.
     Dùng var(--s3), var(--t-body)… thay vì gõ 12px, 14px rải rác. */
  --s1:4px; --s2:8px; --s3:12px; --s4:16px; --s5:24px; --s6:32px;
  --t-cap:11.5px; --t-sm:12.5px; --t-body:13.5px; --t-md:15px; --t-lg:18px; --t-xl:23px; --t-2xl:28px;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{font-family:'Public Sans',-apple-system,BlinkMacSystemFont,'Segoe UI',system-ui,sans-serif;
  color:var(--ink);background:var(--bg2);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}

/* Chuyển cảnh mượt giữa các trang (View Transitions API) */
@view-transition{navigation:auto}
@keyframes vt-fade-in{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
@keyframes vt-fade-out{from{opacity:1}to{opacity:0}}
::view-transition-old(root){animation:vt-fade-out .18s ease both}
::view-transition-new(root){animation:vt-fade-in .28s ease both}
@media (prefers-reduced-motion:reduce){
  ::view-transition-old(root),::view-transition-new(root){animation:none}
}
a{color:var(--blue);text-decoration:none}a:hover{color:var(--blue-d)}
.num{font-variant-numeric:tabular-nums;letter-spacing:.01em}
svg{flex-shrink:0}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:#d3dae4;border-radius:8px;border:2px solid transparent;background-clip:padding-box}

/* ---------- Layout khung quản trị ---------- */
.layout{display:flex;min-height:100vh}
.sidebar{width:252px;flex:0 0 auto;background:linear-gradient(180deg,var(--navy) 0%,var(--navy2) 100%);
  color:#a9c0dc;display:flex;flex-direction:column;padding:16px 14px;position:sticky;top:0;height:100vh}
.sidebar .brand{display:flex;align-items:center;gap:11px;padding:6px 8px 16px;color:#fff}
.sidebar .brand .logo{width:36px;height:36px;border-radius:10px;background:#fff;display:flex;align-items:center;
  justify-content:center;overflow:hidden;box-shadow:0 2px 6px rgba(0,0,0,.25)}
.sidebar .brand .logo img{width:100%;height:100%;object-fit:contain}
.sidebar .brand b{font-weight:800;font-size:16px;letter-spacing:-.02em}
.sidebar .brand b span{color:#4da3ff}
.sidebar .brand small{font-size:11px;color:#6b86ad;font-weight:500;display:block}
.nav{display:flex;flex-direction:column;gap:3px;margin-top:4px}
.nav .group{font-size:10.5px;font-weight:700;letter-spacing:.6px;color:#5c78a0;padding:14px 12px 6px}
.nav a{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;color:#a9c0dc;
  font-size:13.5px;font-weight:600;transition:background .15s,color .15s}
.nav a:hover{background:rgba(255,255,255,.06);color:#fff}
.nav a.active{background:var(--blue);color:#fff;box-shadow:0 4px 12px rgba(29,111,242,.35)}
.sidebar .me{display:flex;align-items:center;gap:11px;padding:12px 10px;background:rgba(255,255,255,.06);border-radius:12px;margin-top:auto}
.sidebar .me .av{width:36px;height:36px;border-radius:50%;background:var(--blue);display:flex;align-items:center;
  justify-content:center;font-weight:800;font-size:14px;color:#fff}
.sidebar .me b{font-size:13px;font-weight:700;color:#fff;display:block}
.sidebar .me small{font-size:11px;color:#6b86ad}
.main{flex:1;background:var(--bg);min-width:0;overflow-y:auto}
.wrap{padding:26px 30px 44px;max-width:1180px}

/* ---------- Topbar mobile + ngăn kéo sidebar + tab đáy ---------- */
.topbar-m{display:none}
.nav-backdrop{display:none}
.tabbar-m{display:none}
@media (max-width:860px){
  /* thẻ số liệu vẫn 2 cột cho gọn (giống WorkOps), nội dung khác xếp dọc */
  .grid.g4{grid-template-columns:1fr 1fr!important}
  .sidebar{position:fixed;left:0;top:0;height:100dvh;width:82vw;max-width:300px;
    transform:translateX(-100%);transition:transform .26s ease;z-index:200;box-shadow:0 0 50px rgba(6,20,40,.4)}
  .sidebar.open{transform:none}
  .nav-backdrop{position:fixed;inset:0;background:rgba(9,26,52,.5);z-index:150;opacity:0;pointer-events:none;transition:opacity .26s}
  .nav-backdrop.open{display:block;opacity:1;pointer-events:auto}
  .main{width:100%}
  .topbar-m{display:flex;align-items:center;gap:12px;position:sticky;top:0;z-index:60;
    background:#fff;border-bottom:1px solid var(--line);padding:11px 14px}
  .topbar-m .ham{width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;
    display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--ink2)}
  .topbar-m b{font-size:15px;font-weight:800;letter-spacing:-.02em}
  .topbar-m b span{color:var(--blue)}
  .topbar-m .logo{width:30px;height:30px;border-radius:8px;overflow:hidden;flex:0 0 auto}
  .topbar-m .logo img{width:100%;height:100%;object-fit:contain}
  .wrap{padding:16px 14px 40px}
  .page-head{flex-wrap:wrap;margin-bottom:18px}
  .grid{grid-template-columns:1fr!important}
  /* chừa chỗ cho thanh tab đáy */
  .main{padding-bottom:calc(62px + env(safe-area-inset-bottom))}
  /* thanh tab điều hướng đáy (kiểu WorkOps) */
  .tabbar-m{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:120;
    background:#fff;border-top:1px solid var(--line);box-shadow:0 -3px 14px rgba(16,24,40,.07);
    padding:5px 2px calc(5px + env(safe-area-inset-bottom))}
  .tabbar-m a{position:relative;flex:1 1 0;min-width:0;display:flex;flex-direction:column;align-items:center;gap:2px;
    padding:5px 2px;color:var(--muted);font-size:10.5px;font-weight:600;text-decoration:none;
    text-align:center;line-height:1.15;-webkit-tap-highlight-color:transparent}
  .tabbar-m a span.lbl{max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .tabbar-m a .ti{width:40px;height:25px;border-radius:9px;display:flex;align-items:center;justify-content:center;transition:background .15s}
  .tabbar-m a .ti svg{width:19px;height:19px}
  .tabbar-m a.active{color:var(--blue)}
  .tabbar-m a.active .ti{background:var(--blue-soft,#e9f1ff)}
  .tabbar-m a .badge-dot{position:absolute;top:2px;left:50%;margin-left:6px;min-width:15px;height:15px;
    padding:0 4px;border-radius:8px;background:#e5484d;color:#fff;font-size:9.5px;font-weight:800;
    display:flex;align-items:center;justify-content:center;box-shadow:0 0 0 2px #fff}
}

/* ---------- Nút quay lại (trang chi tiết) ---------- */
.back-link{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;
  color:var(--muted,#667085);text-decoration:none;margin-bottom:14px;padding:6px 12px 6px 9px;
  border:1px solid var(--line,#e7eaf0);border-radius:9px;background:#fff;transition:.15s}
.back-link:hover{color:var(--blue,#1d6ff2);border-color:#c9ddff;background:#f5f9ff}
.back-link svg{width:15px;height:15px}

/* ---------- Tiêu đề trang ---------- */
.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;margin-bottom:24px}
.page-head h1{font-size:23px;font-weight:800;letter-spacing:-.02em;margin:0;position:relative;padding-left:15px}
.page-head h1::before{content:"";position:absolute;left:0;top:4px;bottom:3px;width:4px;border-radius:3px;background:var(--blue)}
.page-head .sub{font-size:13.5px;color:var(--muted);margin-top:5px;padding-left:15px}

/* ---------- Nút ---------- */
.btn{display:inline-flex;align-items:center;gap:7px;border-radius:9px;padding:10px 16px;font-size:13.5px;
  font-weight:700;font-family:inherit;cursor:pointer;border:1px solid transparent;transition:filter .15s}
.btn:hover{filter:brightness(.97)}
.btn-primary{background:linear-gradient(180deg,#3b82f6,var(--blue));color:#fff;border-color:var(--blue-b);
  box-shadow:0 2px 6px rgba(29,111,242,.3)}
.btn-green{background:linear-gradient(180deg,#1fb15d,var(--green));color:#fff;border-color:var(--green-b);
  box-shadow:0 2px 6px rgba(22,163,74,.28)}
.btn-ghost{background:#fff;color:var(--ink2);border-color:var(--line)}
.btn-danger{background:#fff;color:var(--red);border-color:#fecaca}
.btn-sm{padding:8px 13px;font-size:12.5px}

/* ---------- Card & grid ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm)}
.card.pad{padding:20px}
.card.elev{box-shadow:var(--shadow)}
.grid{display:grid;gap:16px}
.g2{grid-template-columns:1fr 1fr}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:900px){.g2,.g3,.g4{grid-template-columns:1fr}}

/* ---------- Stat card ---------- */
.stat{background:#fff;border:1px solid var(--line);border-top:3px solid var(--blue);border-radius:var(--radius);
  padding:18px;box-shadow:var(--shadow)}
.stat .lbl{font-size:12.5px;color:var(--muted);font-weight:600}
.stat .val{font-size:30px;font-weight:800;margin-top:8px;letter-spacing:-.02em}
.stat .val.sm{font-size:26px}
.stat .delta{font-size:12px;font-weight:600;margin-top:2px}

/* ---------- Bảng ---------- */
.tbl-wrap{overflow-x:auto}
/* Khung cuộn cho danh sách/bảng dài — giữ trang gọn, chỉ cuộn phần danh sách */
.tbl-wrap.tall{max-height:60vh;overflow-y:auto}
.tbl-wrap.tall .tbl thead th{position:sticky;top:0;z-index:2}
.list-scroll{max-height:58vh;overflow-y:auto;overscroll-behavior:contain}
@media (max-width:860px){ .tbl-wrap.tall{max-height:70vh} .list-scroll{max-height:66vh} }
.tbl{width:100%;border-collapse:collapse;font-size:14px}
.tbl th{font-size:11px;font-weight:700;color:var(--muted2);letter-spacing:.04em;text-transform:uppercase;
  text-align:left;padding:13px 20px;background:#fafbfc;border-bottom:1px solid var(--line2);white-space:nowrap}
.tbl td{padding:16px 20px;border-bottom:1px solid var(--line3);vertical-align:middle}
.tbl tr:last-child td{border-bottom:none}
.tbl tr.clickable{cursor:pointer}.tbl tr.clickable:hover{background:var(--soft)}

/* ---------- Badge / pill ---------- */
.badge{display:inline-flex;align-items:center;gap:5px;font-size:11.5px;font-weight:700;padding:4px 10px;border-radius:999px}
.b-blue{color:#1e40af;background:var(--blue-soft)}
.b-gray{color:var(--muted);background:var(--bg)}
.b-green{color:#166534;background:#e7f6ec}
.b-amber{color:#92400e;background:var(--amber-bg)}
.b-red{color:#991b1b;background:var(--red-bg)}
.live{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;color:#166534;background:#e7f6ec;padding:6px 12px;border-radius:999px}
.live .dot{width:7px;height:7px;border-radius:50%;background:var(--green);animation:livedot 1.4s infinite}
@keyframes livedot{0%,100%{opacity:1}50%{opacity:.2}}

/* ---------- Thanh công cụ lọc danh sách ---------- */
.filter-bar{display:flex;gap:12px;align-items:center;justify-content:space-between;flex-wrap:wrap;
  padding:14px 18px;border-bottom:1px solid var(--line2);background:var(--soft)}
.list-filter{flex:1;min-width:220px;max-width:440px;padding:10px 14px;border:1px solid var(--line);border-radius:10px;
  font-family:inherit;font-size:14px;outline:none;background:#fff;color:var(--ink)}
.list-filter:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(29,111,242,.12)}
.list-count{font-size:12.5px;color:var(--muted2);white-space:nowrap;font-weight:500}
.u-hide{display:none!important}

/* ---------- Header của khối danh sách ---------- */
.card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 18px 4px}
.card-head .t{font-size:15.5px;font-weight:800;letter-spacing:-.01em;display:flex;align-items:center;gap:9px}
.card-head .t::before{content:"";width:4px;height:17px;border-radius:3px;background:var(--blue);display:inline-block}

/* ---------- Form ---------- */
.field{display:flex;flex-direction:column;gap:7px;margin-bottom:16px}
.field label{font-size:12.5px;font-weight:700;color:var(--muted)}
.field input,.field select,.field textarea{font-family:inherit;font-size:14px;color:var(--ink);
  padding:11px 13px;border:1px solid var(--line);border-radius:10px;outline:none;background:#fff;width:100%}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(29,111,242,.12)}
.field .hint{font-size:12px;color:var(--muted2)}
/* Combobox gõ-để-tìm (danh mục nhập câu hỏi) */
.combo-menu{position:absolute;left:0;right:0;top:100%;margin-top:5px;z-index:40;background:#fff;
  border:1px solid var(--line);border-radius:10px;box-shadow:0 14px 34px rgba(16,24,40,.14);
  max-height:280px;overflow-y:auto;padding:5px}
.combo-menu .ci{padding:9px 11px;border-radius:8px;font-size:13.5px;cursor:pointer;color:var(--ink);line-height:1.35}
.combo-menu .ci:hover{background:#e9f1ff;color:var(--blue)}
.combo-menu .empty{padding:11px;color:var(--muted2);font-size:12.5px;text-align:center}
.combo-caret{position:absolute;right:12px;top:50%;transform:translateY(-50%);color:var(--muted2);pointer-events:none;font-size:11px}

/* Danh sách danh mục bên trái (Ngân hàng câu hỏi) — hiện ĐỦ tên, không cắt cụt */
.cat-item{display:flex;justify-content:space-between;align-items:flex-start;gap:8px;
  padding:8px 11px;border-radius:8px;font-size:13px;font-weight:600;color:var(--ink2,#344054);
  line-height:1.35;text-decoration:none;margin-bottom:1px}
.cat-item:hover{background:#f3f5f9}
.cat-item.on{background:#e9f1ff;color:var(--blue)}
.cat-item .num{color:var(--muted2);font-weight:700;flex:0 0 auto;font-size:12px;padding-top:1px}

/* ---------- Toast: báo kết quả nổi góc, tự tắt (thay banner cố định) ---------- */
.toast-wrap{position:fixed;right:18px;bottom:18px;z-index:400;display:flex;flex-direction:column;gap:10px;
  max-width:min(380px,calc(100vw - 36px));pointer-events:none}
.toast{background:#fff;border:1px solid var(--line);border-left:3px solid var(--green);border-radius:11px;
  padding:12px 14px;box-shadow:0 8px 26px rgba(15,23,42,.18);font-size:var(--t-sm);color:var(--ink2);
  display:flex;gap:10px;align-items:flex-start;pointer-events:auto;animation:toast-in .26s ease}
.toast.err{border-left-color:var(--red)}
.toast.warn{border-left-color:var(--amber)}
.toast .ico{flex:0 0 auto;font-size:15px;line-height:1.2}
.toast .msg{flex:1;line-height:1.5}
.toast .x{flex:0 0 auto;border:none;background:none;color:var(--muted2);cursor:pointer;font-size:16px;
  line-height:1;padding:0 2px;font-family:inherit}
.toast.out{animation:toast-out .22s ease forwards}
@keyframes toast-in{from{transform:translateY(10px) scale(.98);opacity:0}to{transform:none;opacity:1}}
@keyframes toast-out{to{transform:translateY(6px);opacity:0}}
@media(max-width:860px){ .toast-wrap{right:12px;left:12px;bottom:calc(70px + env(safe-area-inset-bottom));max-width:none} }
@media(prefers-reduced-motion:reduce){ .toast,.toast.out{animation:none} }

/* ---------- Hộp xác nhận dùng chung (thay confirm() thô của trình duyệt) ---------- */
.mask{position:fixed;inset:0;background:rgba(9,26,52,.45);z-index:500;display:flex;align-items:center;
  justify-content:center;padding:16px;animation:fade .18s ease}
.dlg{background:#fff;border-radius:16px;box-shadow:0 24px 60px rgba(16,24,40,.28);width:min(440px,100%);
  padding:22px 22px 18px;animation:pop .2s ease}
.dlg .ic{width:42px;height:42px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  font-size:20px;margin-bottom:12px;background:var(--blue-soft)}
.dlg.danger .ic{background:var(--red-bg)}
.dlg h3{margin:0 0 7px;font-size:var(--t-md);font-weight:800;color:var(--ink);letter-spacing:-.01em}
.dlg p{margin:0 0 18px;font-size:var(--t-body);color:var(--muted);line-height:1.6}
.dlg .acts{display:flex;gap:9px;justify-content:flex-end;flex-wrap:wrap}
@keyframes fade{from{opacity:0}to{opacity:1}}
@keyframes pop{from{transform:scale(.96);opacity:0}to{transform:none;opacity:1}}
@media(prefers-reduced-motion:reduce){ .mask,.dlg{animation:none} }

/* ---------- Trạng thái rỗng có hướng dẫn (thay dòng chữ mờ) ---------- */
.empty-state{text-align:center;padding:44px 24px;color:var(--muted)}
.empty-state .ico{font-size:34px;line-height:1;margin-bottom:10px;opacity:.65}
.empty-state .ttl{font-size:var(--t-md);font-weight:700;color:var(--ink2);margin-bottom:5px}
.empty-state .desc{font-size:var(--t-body);max-width:420px;margin:0 auto 14px;line-height:1.6}
.empty-state .acts{display:flex;gap:9px;justify-content:center;flex-wrap:wrap}

/* Bảng gọn cho danh sách nhiều cột (ngân hàng câu hỏi) — tránh phải kéo ngang */
.tbl.compact th{padding:11px 12px;font-size:10.5px}
.tbl.compact td{padding:11px 12px;font-size:13.5px}
/* Màn hẹp: ẩn cột phụ (Dạng câu, Mức độ) — thông tin đầy đủ vẫn xem được khi mở câu hỏi */
@media (max-width:1400px){ .col-opt{display:none} }
@media (max-width:1120px){ .col-opt2{display:none} }
.alert{padding:12px 16px;border-radius:10px;font-size:13.5px;margin-bottom:16px}
.alert-err{background:var(--red-bg);color:#991b1b;border:1px solid #f6cfcc}
.alert-ok{background:#e7f6ec;color:#166534;border:1px solid #bfe6cd}

/* ---------- Progress bar ---------- */
.prog{height:8px;background:var(--line2);border-radius:6px;overflow:hidden}
.prog>i{display:block;height:100%;border-radius:6px}

/* ---------- Bar chart (phổ điểm) ---------- */
.histo{display:flex;align-items:flex-end;gap:10px;height:190px;padding-top:6px}
.histo .col{flex:1;display:flex;flex-direction:column;align-items:center;gap:8px;height:100%;justify-content:flex-end}
.histo .col i{width:100%;border-radius:7px 7px 0 0;min-height:6px;display:block}
.histo .col span{font-size:11px;color:var(--muted2);font-weight:600}

/* ---------- Đăng nhập ---------- */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px;
  background:radial-gradient(1200px 500px at 50% -10%,#dbe8fc,transparent),var(--bg2)}
.login-card{width:400px;max-width:100%;background:#fff;border:1px solid var(--line);border-radius:18px;
  padding:30px 28px;box-shadow:0 20px 50px -25px rgba(12,44,84,.4)}
.login-card .logo{width:60px;height:60px;border-radius:16px;background:#fff;display:flex;align-items:center;
  justify-content:center;box-shadow:0 10px 24px -12px rgba(29,111,242,.5);overflow:hidden;margin:0 auto 16px}
.login-card .logo img{width:48px;height:48px;object-fit:contain}