/* ============================================================
   NIMBUS — Giao diện "Vibrant Pulse" (Material Design 3)
   Chỉ thay đổi GIAO DIỆN. Giữ nguyên class/id mà app.js dùng.
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;500;600;700&display=swap');

#ddtn-root{
  --bg:#f6f8f9; --card:#ffffff; --ink:#191c1d; --muted:#6b5650; --muted2:#8a7a74;
  --line:#ece3e0; --line2:#e3e6e7; --divider:#eef0f1;
  --p:#bf3409; --p2:#d53e0b; --pt:#ac2d00; --onp:#ffffff; --p-soft:#fdeee9;
  --blue:#0a5f8f; --blue-bg:#e3eef6; --slate:#41555e; --slate-bg:#e8edf0;
  --red:#ba1a1a; --red-bg:#fbe4e1; --amber:#9c4a12; --amber-bg:#fbe7da; --neutral-bg:#eceeef;
  --r:16px; --r-sm:12px; --pill:999px;
  --sh:0 2px 10px rgba(25,28,29,.05); --sh-bar:0 2px 12px rgba(25,28,29,.10);
  font-family:'Roboto',-apple-system,BlinkMacSystemFont,'Segoe UI',Arial,sans-serif;
  color:var(--ink); background:var(--bg);
  max-width:480px; margin:0 auto; box-shadow:0 0 24px rgba(0,0,0,.05); min-height:100vh;
}
#ddtn-root *{box-sizing:border-box;}
#ddtn-root input,#ddtn-root select,#ddtn-root textarea{max-width:100%;min-width:0;box-sizing:border-box;font-family:inherit;}
#ddtn-root input[type="date"],#ddtn-root input[type="month"]{-webkit-appearance:none;appearance:none;}

/* ---------- Đăng nhập ---------- */
.ddtn-login{padding:48px 24px;text-align:center;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;min-height:100vh;}
.ddtn-login h2{font-size:24px;font-weight:700;color:var(--pt);margin:0;}
.ddtn-login p{color:var(--muted);font-size:14px;margin:0 0 12px;max-width:300px;}
#ddtn-gbtn{display:flex;justify-content:center;align-items:center;width:100%;}
#ddtn-gbtn > div,#ddtn-gbtn iframe{margin-left:auto !important;margin-right:auto !important;float:none !important;}
.ddtn-msg{font-size:13px;color:var(--muted);min-height:18px;}

/* ---------- App bar ---------- */
.ddtn-app{padding-top:60px;padding-bottom:78px;}
.ddtn-top{position:fixed;top:0;left:50%;transform:translateX(-50%);z-index:50;width:100%;max-width:480px;display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:nowrap;height:60px;padding:0 16px;background:#fff;box-shadow:0 1px 0 rgba(0,0,0,.05),0 3px 10px rgba(0,0,0,.04);}
.ddtn-brand{font-size:20px;font-weight:800;letter-spacing:.3px;color:var(--pt);white-space:nowrap;flex:0 0 auto;}
.ddtn-userbox{display:flex;align-items:center;gap:8px;min-width:0;flex:1 1 auto;justify-content:flex-end;}
.ddtn-date{display:inline-flex;align-items:center;gap:5px;white-space:nowrap;flex:0 0 auto;}
.ddtn-date label{font-size:11px;font-weight:600;color:var(--muted2);}
.ddtn-date input{width:140px;padding:6px 8px;font-size:13px;font-weight:600;color:var(--ink);border:1px solid var(--line);border-radius:10px;background:#fff;}
.ddtn-user{font-size:11.5px;color:var(--muted);max-width:84px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.ddtn-logout{position:relative;display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:999px;background:transparent;border:0;color:var(--pt);cursor:pointer;flex:0 0 auto;transition:background .15s,opacity .15s;}
.ddtn-logout:hover{background:#f4ece9;}
.ddtn-logout svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:2;}
.ddtn-logout.is-busy{background:var(--p-soft);cursor:progress;opacity:.9;}
.ddtn-logout.is-busy svg{opacity:.22;}
.ddtn-logout.is-busy::after{content:"";position:absolute;width:16px;height:16px;border:2px solid currentColor;border-right-color:transparent;border-radius:999px;animation:ddtn-spin .72s linear infinite;}
@keyframes ddtn-spin{to{transform:rotate(360deg);}}

#ddtn-view{padding:16px;display:flex;flex-direction:column;gap:14px;}

/* ---------- Bottom navigation ---------- */
.ddtn-tabs{position:fixed;left:50%;transform:translateX(-50%);bottom:0;z-index:40;width:100%;max-width:480px;display:flex;justify-content:space-around;align-items:center;gap:2px;height:64px;padding:6px 6px calc(6px + env(safe-area-inset-bottom,0px));background:#fff;box-shadow:var(--sh-bar);}
.ddtn-tab{flex:1 1 0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;height:100%;border:0;background:transparent;color:var(--slate);font-size:11px;font-weight:500;cursor:pointer;border-radius:14px;transition:color .15s;}
.ddtn-tab svg{width:24px;height:24px;stroke:currentColor;fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round;}
.ddtn-tab .ic{display:flex;align-items:center;justify-content:center;width:54px;height:30px;border-radius:999px;transition:background .18s;}
.ddtn-tab.active{color:var(--pt);font-weight:700;}
.ddtn-tab.active .ic{background:var(--p-soft);}

/* ---------- Card chung ---------- */
.ddtn-slot,.ddtn-day-block,.tui-card,.fin-box,.tch-box,.tui-box,.free-box,.hv-card,.vch-card,.quote-box{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh);}
.ddtn-empty{background:var(--card);border:1px dashed var(--line);border-radius:var(--r);padding:18px;text-align:center;color:var(--muted);font-size:14px;}
.ddtn-empty.sm{padding:12px;font-size:13px;}
.ddtn-loading,.load-row{padding:18px;text-align:center;color:var(--muted);font-size:14px;}
.ddtn-err{background:var(--red-bg);color:var(--red);border-radius:var(--r-sm);padding:12px 14px;font-size:14px;font-weight:500;}

/* ---------- Tổng quan (3 thẻ số) ---------- */
.ddtn-totals{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;}
.ddtn-totals .t-big{display:flex;flex-direction:column-reverse;align-items:center;gap:2px;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:12px 6px;font-size:11px;font-weight:600;color:var(--muted2);text-transform:uppercase;letter-spacing:.4px;box-shadow:var(--sh);}
.ddtn-totals .t-big b{font-size:24px;font-weight:800;color:var(--pt);letter-spacing:0;}

/* ---------- Chip tóm tắt trạng thái ---------- */
.ddtn-summary{display:flex;flex-wrap:wrap;gap:8px;}
.ddtn-summary .b{font-family:inherit;font-size:12px;font-weight:600;padding:6px 12px;border:0;border-radius:var(--pill);background:var(--neutral-bg);color:var(--muted);cursor:pointer;}
.ddtn-summary .b.active{box-shadow:0 0 0 2px #fff,0 0 0 4px rgba(191,52,9,.22);transform:translateY(-1px);}
#status-filter-note:empty{display:none;}
.status-filter-note{display:flex;align-items:center;justify-content:space-between;gap:8px;background:#fff;border:1px solid var(--line);border-radius:var(--r-sm);padding:10px 12px;font-size:13px;color:var(--muted);box-shadow:var(--sh);}
.status-filter-note b{color:var(--pt);}
.status-filter-note button{flex:0 0 auto;border:0;border-radius:var(--pill);background:var(--p-soft);color:var(--pt);font:inherit;font-size:12px;font-weight:700;padding:7px 10px;cursor:pointer;}
.b.s-dihoc{background:var(--blue-bg);color:var(--blue);}
.b.s-nghi{background:var(--red-bg);color:var(--red);}
.b.s-hocbu{background:var(--slate-bg);color:var(--slate);}
.b.s-hocthu{background:var(--blue-bg);color:var(--blue);}
.b.s-khong{background:var(--amber-bg);color:var(--amber);}
.b.s-chua{background:var(--neutral-bg);color:var(--muted);}

/* ---------- Khung giờ + thẻ học viên ---------- */
.ddtn-slot{overflow:hidden;}
.ddtn-slot-h{background:var(--p-soft);color:var(--pt);font-weight:700;font-size:14px;padding:11px 16px;}
.ddtn-card{display:flex;align-items:flex-start;gap:12px;padding:12px 16px;border-top:1px solid var(--divider);}
.ddtn-slot .ddtn-card:first-of-type{border-top:0;}
.ddtn-id{display:flex;align-items:center;gap:10px;flex:1 1 auto;min-width:0;}
.ddtn-name{display:block;min-width:0;flex:1 1 auto;}
.ddtn-name b{font-size:15px;font-weight:600;color:var(--ink);}
.ddtn-name .nick{display:block;font-size:12.5px;color:var(--muted2);font-weight:500;margin-top:2px;}
.ddtn-name small.ph{display:block;font-size:12px;color:var(--muted);margin-top:4px;}
.ddtn-av{width:42px;height:42px;border-radius:999px;flex:0 0 auto;align-self:flex-start;overflow:hidden;display:flex;align-items:center;justify-content:center;background:var(--blue-bg);color:var(--blue);font-weight:700;font-size:15px;}
.ddtn-av img{width:100%;height:100%;object-fit:cover;}
.ddtn-av.ini{background:var(--p-soft);color:var(--pt);}

/* tag nhỏ cạnh tên */
.tag,.tag-thu,.tag-bu{display:inline-block;font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.4px;padding:2px 7px;border-radius:var(--pill);margin-left:6px;vertical-align:middle;}
.tag-thu{background:var(--blue-bg);color:var(--blue);}
.tag-bu{background:var(--slate-bg);color:var(--slate);}

/* badge trạng thái (chế độ xem) */
.ddtn-badge{font-size:12px;font-weight:600;padding:6px 12px;border-radius:var(--pill);white-space:nowrap;flex:0 0 auto;}
.ddtn-badge.s-dihoc{background:var(--blue-bg);color:var(--blue);}
.ddtn-badge.s-nghi{background:var(--red-bg);color:var(--red);}
.ddtn-badge.s-hocbu{background:var(--slate-bg);color:var(--slate);}
.ddtn-badge.s-hocthu{background:var(--blue-bg);color:var(--blue);}
.ddtn-badge.s-khong{background:var(--amber-bg);color:var(--amber);}
.ddtn-badge.s-chua{background:var(--neutral-bg);color:var(--muted);}

/* nút điểm danh */
.ddtn-btns{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px;}
.ddtn-badge{display:inline-block;margin-top:6px;}
.bt{font-size:12.5px;font-weight:600;padding:7px 12px;border-radius:var(--pill);border:1px solid var(--line);background:#fff;color:var(--muted);cursor:pointer;transition:all .12s;}
.bt:hover{border-color:var(--p);color:var(--p);}
.bt.on.s-dihoc{background:var(--blue-bg);color:var(--blue);border-color:var(--blue);}
.bt.on.s-nghi{background:var(--red-bg);color:var(--red);border-color:var(--red);}
.bt.on.s-hocbu{background:var(--slate-bg);color:var(--slate);border-color:var(--slate);}
.bt.on.s-hocthu{background:var(--blue-bg);color:var(--blue);border-color:var(--blue);}
.bt.on.s-khong{background:var(--amber-bg);color:var(--amber);border-color:var(--amber);}
.bt.on.s-chua{background:var(--neutral-bg);color:var(--ink);border-color:var(--muted2);}

/* ---------- TKB tuần ---------- */
.ddtn-day-block{overflow:hidden;}
.ddtn-day-h{background:var(--p);color:var(--onp);font-weight:700;font-size:14px;padding:10px 16px;}
.ddtn-wslot{padding:12px 16px;border-top:1px solid var(--divider);}
.ddtn-wslot:first-of-type{border-top:0;}
.ddtn-wslot .kg{display:inline-block;font-weight:700;color:var(--pt);font-size:13px;margin-bottom:4px;}
.wline{font-size:14px;color:var(--ink);margin-top:3px;line-height:1.5;}
.wline .gv{color:var(--pt);font-weight:600;}
.wline .cnt{color:var(--muted2);font-weight:600;}
.wtags{display:inline-flex;flex-wrap:wrap;gap:5px;vertical-align:middle;}
.wtag{display:inline-block;font-size:12px;font-weight:600;line-height:1.3;padding:3px 9px;border-radius:var(--pill);background:#fff;border:1px solid var(--line);color:var(--ink);}
.wtag-bu{background:#e3f3e2;border-color:#bfe3bd;color:#1f7a3a;font-weight:700;}
.wtag-thu{background:#fff3cd;border-color:#ffe08a;color:#8a6d1d;font-weight:700;}
.week-legend{display:flex;flex-wrap:wrap;gap:8px 16px;padding:8px 0 4px;font-size:12.5px;color:var(--muted);}
.wleg-item{display:inline-flex;align-items:center;gap:5px;}

/* ---------- Thanh nút quản trị (lưới 2 cột) ---------- */
.ddtn-bar{display:grid;grid-template-columns:1fr 1fr;gap:10px;}
.ddtn-action{display:flex;align-items:center;justify-content:center;gap:6px;padding:13px 12px;background:#fff;color:var(--ink);border:1px solid var(--line);border-radius:var(--r-sm);font-size:13.5px;font-weight:600;cursor:pointer;box-shadow:var(--sh);transition:all .15s;text-align:center;}
.ddtn-action:hover{background:var(--p-soft);}
.ddtn-action.active{background:var(--p);color:#fff;border-color:var(--p);box-shadow:0 4px 12px rgba(191,52,9,.28);}

/* ---------- Nút chính / phụ ---------- */
.ddtn-primary{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;margin-top:14px;background:var(--p);color:#fff;border:0;border-radius:var(--r-sm);padding:13px;font-size:15px;font-weight:700;cursor:pointer;box-shadow:0 3px 10px rgba(191,52,9,.22);transition:background .15s;}
.ddtn-primary:hover{background:var(--p2);}
.q-actions{display:flex;gap:8px;margin-top:14px;}
.q-actions .ddtn-action,.q-actions .ddtn-primary{flex:1;margin:0;}

/* ---------- Buổi trống ---------- */
.free-box{padding:14px;}
.free-h{font-size:13px;color:var(--muted);margin-bottom:10px;}
.free-day{margin-bottom:12px;}
.free-day-h{font-weight:700;color:var(--pt);font-size:14px;margin-bottom:6px;}
.free-row{display:flex;gap:8px;align-items:flex-start;margin-bottom:8px;}
.free-kg{flex:0 0 92px;font-weight:600;font-size:12.5px;color:var(--ink);padding-top:5px;}
.free-grid{flex:1;display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:6px;}
.free-t{font-size:12.5px;font-weight:600;padding:7px 10px;border-radius:var(--pill);background:var(--blue-bg);color:var(--blue);display:flex;justify-content:space-between;gap:6px;}
.free-t.free-full{background:var(--red-bg);color:var(--red);}
.free-actions{margin-top:8px;}

/* ---------- Thông tin giáo viên ---------- */
.tch-box{padding:16px;}
.tch-headbar{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:10px;}
.tch-headbar label,.thang{font-weight:700;color:var(--pt);font-size:15px;width:100%;}
.tch-headbar input[type="month"]{flex:1 1 auto;padding:11px 12px;border:1px solid var(--line);border-radius:var(--r-sm);font-size:14px;background:#fff;}
.tch-legend{display:flex;gap:16px;font-size:12.5px;color:var(--muted);margin:4px 0 8px;}
.tch-legend .tuan::before,.tch-legend .thang::before{content:"";display:inline-block;width:11px;height:11px;border-radius:3px;margin-right:6px;vertical-align:-1px;}
.tch-legend .tuan{width:auto;color:var(--muted);font-weight:500;font-size:12.5px;}
.tch-legend .tuan::before{background:var(--slate);}
.tch-legend .thang{width:auto;color:var(--muted);font-weight:500;font-size:12.5px;}
.tch-legend .thang::before{background:var(--blue);}
.tch-row{display:flex;align-items:center;gap:10px;padding:12px 0;border-bottom:1px solid var(--divider);}
.tch-row:last-child{border-bottom:0;}
.tch-name{flex:0 0 72px;font-weight:600;font-size:13px;color:var(--ink);}
.tch-bars{flex:1;display:flex;flex-direction:column;gap:5px;min-width:0;}
.tbar{position:relative;height:24px;border-radius:var(--pill);background:var(--neutral-bg);overflow:hidden;display:flex;align-items:center;}
.tfill{position:absolute;left:0;top:0;height:100%;border-radius:var(--pill);}
.tbar.tuan .tfill{background:var(--slate);opacity:.22;}
.tbar.thang .tfill{background:var(--blue);}
.tval{position:relative;z-index:1;padding:0 10px;font-size:12px;font-weight:600;}
.tbar.tuan .tval{color:var(--ink);}
.tbar.thang .tval{color:#fff;}
.tch-vch{display:flex;align-items:center;gap:5px;flex:0 0 auto;border:1px solid var(--line);border-radius:var(--r-sm);padding:7px 10px;background:#fff;color:var(--pt);font-size:12.5px;font-weight:600;cursor:pointer;}
.tch-vch:hover{background:var(--p-soft);}
.tch-gridbtn{margin-top:12px;}

/* ---------- Thu học phí ---------- */
.tui-box,.fin-box{padding:14px;display:flex;flex-direction:column;gap:10px;}
.hv-search,.mk-search{position:relative;}
input.tui-search,.hv-search input,.mk-search input{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:var(--r-sm);font-size:14px;background:#fff;color:var(--ink);}
input.tui-search:focus,.hv-search input:focus,.mk-search input:focus{outline:none;border-color:var(--p);box-shadow:0 0 0 3px rgba(191,52,9,.12);}
.tui-card{padding:16px;}
.tui-h{font-weight:700;font-size:16px;color:var(--ink);}
.tui-nick{color:var(--muted2);font-weight:500;font-size:13px;}
.tui-info{font-size:12.5px;color:var(--muted);margin:4px 0 10px;}
.tui-con{color:var(--red);}
.tui-draft-tag{display:inline-block;font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.4px;padding:2px 8px;border-radius:var(--pill);background:var(--amber-bg);color:var(--amber);margin-left:6px;}
.tui-badges{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:2px 0 4px;}
.tui-badge{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;padding:10px 4px;border-radius:var(--r-sm);font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.2px;text-align:center;line-height:1.25;min-width:0;}
.tui-badge b,.tui-badge span{display:block;}
.bd-tong{background:var(--neutral-bg);color:var(--muted);}
.bd-da{background:var(--blue-bg);color:var(--blue);}
.bd-con{background:var(--amber-bg);color:var(--amber);}
.tui-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;margin-bottom:10px;}
.tui-grid label,.fin-row label,.q-dates label{display:block;font-size:11.5px;font-weight:600;color:var(--muted);margin-bottom:4px;}
.tui-grid input,.tui-grid select,.fin-row input,.q-dates input{width:100%;padding:11px;border:1px solid var(--line);border-radius:var(--r-sm);font-size:14px;background:#fff;}
.tui-sess-h{font-size:12.5px;font-weight:600;color:var(--pt);margin:8px 0 6px;}
.sess-row.tui-sess{display:flex;gap:6px;align-items:center;margin-bottom:6px;}
.sess-row.tui-sess .bz{flex:0 0 52px;font-size:12px;font-weight:600;color:var(--muted);}
.sess-row.tui-sess select{flex:1;min-width:0;padding:9px;border:1px solid var(--line);border-radius:10px;font-size:13px;background:#fff;}
.sess-del{flex:0 0 auto;width:34px;height:34px;border:0;border-radius:10px;background:var(--red-bg);color:var(--red);font-weight:800;cursor:pointer;}
.sess-del:disabled{opacity:.4;}
.sess-add{width:100%;margin:2px 0 4px;padding:9px;border:1px dashed var(--p);border-radius:10px;background:var(--p-soft);color:var(--pt);font-weight:600;cursor:pointer;}
.tui-qline,.quote-box{background:var(--p-soft);border-radius:var(--r-sm);padding:10px 12px;font-size:14px;margin:8px 0;color:var(--ink);}
.tui-giam{color:var(--red);font-weight:700;}
.tui-acts{margin-top:12px;}
.tui-act-top,.tui-topacts{display:flex;gap:8px;margin-bottom:8px;}
.tui-act-top button,.tui-topacts button{flex:1;margin:0;}
.tui-paid{width:100%;background:var(--p);color:#fff;border:0;border-radius:var(--r-sm);padding:12px;font-weight:700;cursor:pointer;box-shadow:0 3px 10px rgba(191,52,9,.22);}
.tui-paid:disabled{opacity:.45;box-shadow:none;}
.tui-paid.paid-done{background:#1f7a4d;}
.tui-note{font-size:12px;color:var(--muted);margin-top:6px;}

/* ---------- Thống kê thu chi ---------- */
.fin-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;margin-bottom:10px;}
.fin-cost-h{font-size:12.5px;font-weight:600;color:var(--pt);margin:6px 0;}
.fin-c{display:flex;gap:8px;align-items:center;margin-bottom:8px;flex-wrap:wrap;}
.fin-cname,.fin-cn-edit{flex:1 1 120px;font-size:13px;}
.fin-cn-edit{padding:9px;border:1px solid var(--line);border-radius:10px;}
.fin-cv{flex:1 1 auto;padding:10px;border:1px solid var(--line);border-radius:10px;font-size:14px;text-align:right;background:#fff;}
.fin-del{flex:0 0 auto;width:34px;height:34px;border:0;border-radius:10px;background:var(--red-bg);color:var(--red);font-weight:800;cursor:pointer;}
.fin-summary{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:10px;}
.fin-kpi{background:var(--card);border:1px solid var(--line);border-radius:var(--r-sm);padding:12px;}
.fin-kpi span{display:block;color:var(--muted);font-size:10.8px;font-weight:700;line-height:1.25;min-height:28px;}
.fin-kpi b{display:block;margin-top:5px;font-size:14px;line-height:1.2;word-break:break-word;}
.fin-kpi .pos,.fin-kpi b.pos{color:#1f7a4d;font-weight:800;}
.fin-kpi .neg,.fin-kpi b.neg{color:var(--red);font-weight:800;}
.fin-card{max-width:560px;}
.fin-period{display:inline-flex;align-items:center;background:var(--p-soft);color:var(--pt);border-radius:var(--pill);padding:6px 10px;font-size:12.5px;font-weight:700;margin-bottom:2px;}
.fin-top-row{grid-template-columns:repeat(4,minmax(0,1fr));}
.fin-profit-box{margin-top:12px;background:#fff8f4;border:1px solid #f0d7cf;border-radius:var(--r-sm);padding:12px;}
.fin-profit-title{font-size:12px;font-weight:800;text-transform:uppercase;color:var(--pt);letter-spacing:.2px;margin-bottom:8px;}
.fin-profit-row{grid-template-columns:repeat(3,minmax(0,1fr));margin-top:0;}
.fin-profit-row .fin-kpi{box-shadow:none;}

/* ---------- Học viên ---------- */
.hv-top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:2px;}
.hv-top h3,.step-h{font-size:16px;font-weight:700;color:var(--ink);margin:0;}
.hv-count,.ddtn-count{background:var(--p);color:#fff;font-size:12px;font-weight:700;padding:4px 12px;border-radius:var(--pill);}
.hv-card{display:flex;align-items:center;gap:12px;padding:14px 16px;}
.hv-body{flex:1 1 auto;min-width:0;}
.hv-top{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:2px;}
.hv-top b{font-size:15px;font-weight:600;color:var(--ink);}
.hv-name{font-weight:600;font-size:15px;color:var(--ink);}
.hv-ma{display:inline-block;font-size:11px;font-weight:600;color:var(--muted);background:var(--neutral-bg);border-radius:var(--pill);padding:1px 8px;}
.hv-line{font-size:12.5px;color:var(--muted);margin-top:2px;overflow:hidden;text-overflow:ellipsis;}
.hv-line.nick{color:var(--muted2);font-weight:500;}
.hv-call{flex:0 0 auto;width:42px;height:42px;border-radius:999px;background:var(--p-soft);color:var(--pt);display:flex;align-items:center;justify-content:center;text-decoration:none;}
.hv-call svg{width:20px;height:20px;fill:currentColor;stroke:none;}
.list{display:flex;flex-direction:column;gap:12px;}
.list-row{display:flex;align-items:center;gap:12px;}
.need-box{display:flex;flex-direction:column;gap:10px;margin-top:10px;}
.need-row{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:12px;border:1px solid var(--line);border-radius:var(--r-sm);background:#fff;box-shadow:var(--sh);}
.need-row b{display:block;font-size:14px;color:var(--ink);}
.need-row small{display:block;font-size:12px;color:var(--muted);margin-top:2px;}
.need-row .ddtn-action{flex:0 0 auto;min-width:84px;padding:9px 10px;box-shadow:none;}

/* ---------- Đăng ký ---------- */
.reg-tabs{display:flex;gap:8px;margin-bottom:14px;}
.reg-tab{flex:1;padding:10px;border:1px solid var(--line);border-radius:var(--pill);background:#fff;color:var(--muted);font-weight:600;font-size:13px;cursor:pointer;text-align:center;}
.reg-tab.active{background:var(--p);color:#fff;border-color:var(--p);}
.form{display:flex;flex-direction:column;gap:12px;}
.form label{font-size:12px;font-weight:600;color:var(--muted);margin-bottom:4px;display:block;}
.form input,.form select,.form textarea{width:100%;padding:12px;border:1px solid var(--line);border-radius:var(--r-sm);font-size:14px;background:#fff;}
.form input:focus,.form select:focus,.tui-grid input:focus,.fin-row input:focus{outline:none;border-color:var(--p);box-shadow:0 0 0 3px rgba(191,52,9,.12);}
.sess-row{margin-bottom:8px;}
.sess-row select{margin-top:6px;}
.q-row{display:flex;justify-content:space-between;font-size:14px;padding:3px 0;}
.q-sub{color:var(--muted);}
.q-total{font-size:16px;font-weight:800;color:var(--pt);}
.q-words{font-size:12px;color:var(--muted);font-style:italic;}
.q-dates{display:grid;grid-template-columns:1fr 1fr;gap:10px;}
.opt-full{color:var(--red);}

/* ---------- Phiếu chi (modal) ---------- */
.vch-modal{position:fixed;inset:0;background:rgba(0,0,0,.45);display:flex;align-items:center;justify-content:center;z-index:60;padding:16px;}
.vch-card{max-width:420px;width:100%;padding:18px;max-height:88vh;overflow:auto;}
.vch-card.fin-card{max-width:560px;}
.vch-h{font-size:18px;font-weight:700;color:var(--pt);margin-bottom:10px;}
.vch-line{display:flex;justify-content:space-between;font-size:14px;padding:4px 0;border-bottom:1px solid var(--divider);}
.vch-total{font-size:16px;font-weight:800;color:var(--pt);margin-top:8px;}
.vch-lessons{max-height:220px;overflow:auto;padding-right:4px;align-content:start;-webkit-overflow-scrolling:touch;}
.vch-lessons .qd{min-width:0;background:var(--neutral-bg);border-radius:var(--r-sm);padding:8px 10px;font-size:12.5px;color:var(--ink);line-height:1.35;}

/* ---------- Phụ trợ ---------- */
.form-msg,.note{font-size:13px;margin-top:6px;}
.ok,.saved{color:#1f7a4d;font-weight:600;}
.bad,.bad-line,.err{color:var(--red);font-weight:600;}
.warn{color:var(--amber);font-weight:600;}
.info-line{font-size:13px;color:var(--muted);}
.holi-note,.is-holiday,.hl{color:var(--red);font-weight:600;}
.off{color:var(--muted2);}
.q-sub.pos,.pos{color:#1f7a4d;}
.neg{color:var(--red);}

/* ---------- Responsive nhỏ ---------- */
@media (max-width:380px){
  .ddtn-date input{width:128px;}
  .ddtn-brand{font-size:18px;}
  .fin-top-row{grid-template-columns:repeat(2,minmax(0,1fr));}
  .fin-profit-row{grid-template-columns:1fr;}
  .status-filter-note{align-items:flex-start;flex-direction:column;}
  .home-row{flex-direction:column;}
  .home-row-stat{justify-content:flex-start;}
}

/* ---------- Badge vai trò AD/GV ---------- */
.ddtn-user.role{font-size:11px;font-weight:800;letter-spacing:.5px;padding:4px 9px;border-radius:var(--pill);max-width:none;overflow:visible;}
.role-ad{background:var(--p);color:#fff;}
.role-gv{background:var(--slate-bg);color:var(--slate);}
.ddtn-brand.clickable{cursor:pointer;}
.ddtn-brand.clickable:active{opacity:.7;}

/* ---------- Trang chủ (admin) ---------- */
.home-head,.feature-head{display:flex;align-items:center;justify-content:space-between;gap:10px;}
.feature-head .home-title{flex:1;}
.home-title{font-size:20px;font-weight:800;color:var(--pt);margin:0;}
.home-back{border:1px solid var(--line);background:#fff;color:var(--pt);border-radius:var(--pill);padding:7px 14px;font-weight:600;font-size:13px;cursor:pointer;}
.home-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;}
.home-kpi{display:flex;flex-direction:column;align-items:center;gap:2px;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:16px 6px;box-shadow:var(--sh);}
.home-kpi-btn{width:100%;font:inherit;color:inherit;text-align:center;-webkit-appearance:none;appearance:none;cursor:pointer;transition:border-color .15s ease,background .15s ease,transform .15s ease;}
.home-kpi-btn:hover{background:var(--p-soft);border-color:rgba(191,52,9,.32);}
.home-kpi-btn:active{transform:translateY(1px);}
.home-kpi b{font-size:26px;font-weight:800;color:var(--pt);line-height:1;}
.home-kpi span{font-size:10.5px;font-weight:600;color:var(--muted2);text-transform:uppercase;letter-spacing:.3px;text-align:center;}
.home-kpi.home-warn b{color:var(--red);}
.home-sub{font-size:15px;font-weight:700;color:var(--ink);margin:4px 0 0;}
.home-list{display:flex;flex-direction:column;gap:10px;}
.home-row{display:flex;align-items:flex-start;justify-content:space-between;gap:10px;background:#fff;border:1px solid var(--line);border-radius:var(--r-sm);padding:12px 14px;box-shadow:var(--sh);}
.home-row-main{min-width:0;flex:1 1 auto;}
.home-row-main b{font-size:14px;font-weight:600;color:var(--ink);display:block;}
.home-row-main small{font-size:12px;color:var(--muted);}
.home-row-stat{display:flex;gap:6px;flex:0 1 auto;flex-wrap:wrap;justify-content:flex-end;}
.home-chip{font-size:11.5px;font-weight:700;padding:5px 10px;border-radius:var(--pill);white-space:nowrap;}
.home-chip.nghi{background:var(--red-bg);color:var(--red);}
.home-chip.khong{background:var(--amber-bg);color:var(--amber);}
.home-chip.bu{background:var(--slate-bg);color:var(--slate);}

/* ---------- TKB tuần: nút Buổi trống đứng riêng + giãn thẻ thứ ---------- */
.free-toggle{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;padding:14px;background:#fff;color:var(--pt);border:1px solid var(--line);border-radius:var(--r);font-size:15px;font-weight:700;cursor:pointer;box-shadow:var(--sh);transition:all .15s;}
.free-toggle:hover{background:var(--p-soft);}
.free-toggle.active{background:var(--p);color:#fff;border-color:var(--p);box-shadow:0 4px 12px rgba(191,52,9,.28);}
.ddtn-week{display:flex;flex-direction:column;gap:18px;margin-top:2px;}

/* ---------- Tổng quan: nhóm chức năng quản lý ---------- */
.home-tools{display:flex;flex-direction:column;gap:10px;}
.home-tool{display:flex;align-items:center;gap:12px;width:100%;padding:14px 16px;background:#fff;color:var(--ink);border:1px solid var(--line);border-radius:var(--r-sm);font-size:15px;font-weight:600;cursor:pointer;box-shadow:var(--sh);transition:all .15s;text-align:left;}
.home-tool:hover{background:var(--p-soft);}
.home-tool.active{background:var(--p);color:#fff;border-color:var(--p);box-shadow:0 4px 12px rgba(191,52,9,.28);}
.home-tool .ht-ic{width:36px;height:36px;flex:0 0 36px;display:inline-flex;align-items:center;justify-content:center;border-radius:var(--pill);background:var(--p-soft);color:var(--pt);line-height:1;}
.home-tool .ht-ic svg{width:20px;height:20px;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;fill:none;}
.home-tool.active .ht-ic{background:rgba(255,255,255,.22);color:#fff;}
.home-tool .ht-tx{flex:1 1 auto;}
@media (max-width:430px){
  .home-stats{grid-template-columns:repeat(2,minmax(0,1fr));}
}

/* ---------- Quản trị dữ liệu ---------- */
.admin-box{background:#fff;border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh);padding:14px;display:flex;flex-direction:column;gap:12px;}
.admin-head{display:flex;align-items:center;justify-content:space-between;gap:10px;}
.admin-head h3{font-size:16px;font-weight:800;color:var(--pt);margin:0;}
.admin-toolbar{display:flex;gap:8px;align-items:center;flex-wrap:wrap;}
.admin-toolbar input{flex:1 1 150px;min-width:0;min-height:38px;box-sizing:border-box;padding:8px 10px;border:1px solid var(--line);border-radius:10px;background:#fff;font-size:13px;}
.admin-toolbar-range{align-items:center;}
.admin-toolbar .admin-search{flex:1 1 180px;}
.admin-field{flex:1 1 168px;min-width:0;min-height:38px;box-sizing:border-box;display:flex;align-items:center;gap:8px;padding:0 10px;border:1px solid var(--line);border-radius:10px;background:#fff;font-size:11.5px;font-weight:800;color:var(--muted);}
.admin-field span{flex:0 0 auto;white-space:nowrap;}
.admin-field input{width:100%;flex:1 1 auto;min-width:0;min-height:0;height:24px;box-sizing:border-box;padding:0;border:0;border-radius:0;background:transparent;font-size:13px;}
.admin-field input:focus{outline:none;box-shadow:none;}
.admin-check{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--muted);font-weight:600;}
.admin-toggle{min-height:38px;padding:8px 12px;border:1px solid var(--line);border-radius:var(--pill);background:#fff;color:var(--muted);font-size:12.5px;font-weight:800;cursor:pointer;white-space:nowrap;}
.admin-toggle.active{background:var(--p);border-color:var(--p);color:#fff;box-shadow:0 4px 12px rgba(191,52,9,.18);}
.admin-table-wrap{overflow:auto;border:1px solid var(--line);border-radius:var(--r-sm);max-width:100%;}
.admin-table{width:max-content;min-width:100%;border-collapse:collapse;background:#fff;table-layout:auto;}
.admin-table th,.admin-table td{border-bottom:1px solid var(--divider);padding:9px 10px;text-align:left;font-size:12.5px;vertical-align:top;white-space:nowrap;}
.admin-table th{background:var(--p-soft);color:var(--pt);font-weight:800;position:sticky;top:0;z-index:1;}
.admin-table tr.is-low td{background:var(--amber-bg);}
.admin-table input{width:100%;min-width:110px;padding:8px;border:1px solid var(--line);border-radius:9px;background:#fff;font-size:12.5px;}
.admin-table input.wide-text{min-width:220px;}
.admin-table input.mid-text{min-width:160px;}
.admin-table input.phone-text{min-width:145px;}
.admin-table .col-ma_hv,.admin-table .col-mahv,.admin-table .col-ma_gv{min-width:96px;}
.admin-table .col-ho_ten,.admin-table .col-hoten{min-width:220px;}
.admin-table .col-nick,.admin-table .col-nickname{min-width:150px;}
.admin-table .col-phu_huynh,.admin-table .col-phuhuynh{min-width:190px;}
.admin-table .col-sdt{min-width:145px;}
.admin-table .col-ngay,.admin-table .col-ngay_xuat,.admin-table .col-ngay_bd,.admin-table .col-ngay_kt{min-width:118px;}
.admin-table .col-giao_vien,.admin-table .col-giaovien{min-width:150px;}
.admin-table .col-khung_gio,.admin-table .col-khunggio{min-width:125px;}
.admin-table .col-ghi_chu{min-width:220px;}
.admin-table .col-ma_phieu{min-width:145px;}
.admin-table .money-col{text-align:right;font-variant-numeric:tabular-nums;}
.admin-table .admin-toggle{min-height:32px;padding:6px 10px;font-size:11.5px;}

/* ---------- Quản trị học viên dạng thẻ ---------- */
.admin-hv-list{display:flex;flex-direction:column;gap:12px;}
.ad-hv-more,.ad-issue-more{display:block;margin:12px auto 0;min-width:160px;}
.admin-hv-card{align-items:flex-start;position:relative;}
.admin-hv-card .hv-body{min-width:0;flex:1 1 auto;}
.hv-card-actions{display:flex;flex-direction:column;gap:8px;flex:0 0 112px;}
.hv-card-actions .ddtn-action{width:100%;min-height:38px;padding:9px 10px;box-shadow:none;}
.hv-chip-row{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px;}
.hv-issue-tag{display:inline-block;font-size:10.5px;font-weight:800;color:var(--red);background:var(--red-bg);border-radius:var(--pill);padding:2px 8px;margin-left:6px;}
.hv-schedule-issue{border-color:rgba(186,26,26,.38);background:linear-gradient(0deg,rgba(251,228,225,.48),#fff);}
.hv-makeup-warn{border-color:rgba(156,74,18,.35);background:linear-gradient(0deg,rgba(251,231,218,.48),#fff);}
.hv-bad-list{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px;}
.hv-bad-list span{font-size:11.5px;font-weight:700;color:var(--red);background:var(--red-bg);border-radius:var(--pill);padding:5px 9px;}
.student-edit-box .gv-fields{grid-template-columns:repeat(auto-fit,minmax(170px,1fr));}
.edit-sessions{display:flex;flex-direction:column;gap:8px;}
.admin-sess{display:grid !important;grid-template-columns:58px minmax(86px,.8fr) minmax(150px,1.2fr) auto 34px;gap:8px;align-items:center;margin-bottom:0 !important;}
.admin-sess .sess-slot,.admin-sess .sess-thu{margin-top:0 !important;}
.sess-issue{font-size:10.5px;font-weight:800;color:var(--red);background:var(--red-bg);border-radius:var(--pill);padding:5px 8px;white-space:nowrap;}
.sess-add,.sess-del{border:1px solid var(--line);background:#fff;color:var(--pt);border-radius:var(--r-sm);font-weight:800;cursor:pointer;}
.sess-add{min-height:38px;padding:9px 12px;}
.sess-del{width:34px;height:34px;}
.sess-del:disabled{opacity:.45;cursor:not-allowed;}
@media (max-width:520px){
  .admin-hv-card{flex-wrap:wrap;}
  .hv-card-actions{flex:1 1 100%;flex-direction:row;}
  .admin-sess{grid-template-columns:1fr 1fr 34px;}
  .admin-sess .bz,.admin-sess .sess-issue{grid-column:1/-1;}
  .admin-sess .sess-slot{grid-column:1/3;}
}

/* ---------- Quản trị giáo viên ---------- */
.gv-list{display:flex;flex-direction:column;gap:12px;}
.gv-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh);padding:14px;display:flex;flex-direction:column;gap:12px;}
.gv-card-h{display:flex;align-items:flex-start;justify-content:space-between;gap:10px;}
.gv-card-h b{display:block;font-size:16px;color:var(--ink);}
.gv-code{display:inline-flex;margin-bottom:4px;background:var(--neutral-bg);color:var(--muted);border-radius:var(--pill);padding:3px 8px;font-size:11px;font-weight:800;}
.gv-type{flex:0 0 auto;border-radius:var(--pill);padding:6px 10px;font-size:11.5px;font-weight:800;white-space:nowrap;}
.gv-type.in{background:var(--blue-bg);color:var(--blue);}
.gv-type.out{background:var(--amber-bg);color:var(--amber);}
.gv-fields{display:grid;grid-template-columns:repeat(auto-fit,minmax(145px,1fr));gap:10px;}
.gv-fields label{display:flex;flex-direction:column;gap:4px;font-size:11.5px;font-weight:700;color:var(--muted);}
.gv-fields input{width:100%;min-width:0;padding:10px;border:1px solid var(--line);border-radius:var(--r-sm);font-size:13.5px;background:#fff;}
.gv-fields input:focus,.slot-row input:focus,.slot-row select:focus,.slot-add input:focus,.slot-add select:focus{outline:none;border-color:var(--p);box-shadow:0 0 0 3px rgba(191,52,9,.12);}
.gv-sub{font-size:13px;font-weight:800;color:var(--pt);margin-top:2px;}
.gv-slot-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:10px;}
.gv-day{border:1px solid var(--line);border-radius:var(--r-sm);background:var(--p-soft);padding:8px;min-width:0;}
.gv-day-h{font-size:12.5px;font-weight:800;color:var(--pt);margin-bottom:6px;}
.gv-slot{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 11px;margin-top:7px;min-height:46px;font-size:13px;color:var(--ink);line-height:1.25;cursor:pointer;user-select:none;transition:border-color .16s ease,background .16s ease,box-shadow .16s ease;}
.gv-slot:hover{border-color:rgba(191,52,9,.32);background:#fffaf8;}
.gv-slot input{-webkit-appearance:none;appearance:none;width:24px;height:24px;margin:0;border:2px solid var(--line2);border-radius:7px;background:#fff;accent-color:var(--p);flex:0 0 24px;display:grid;place-content:center;transition:border-color .16s ease,background .16s ease,box-shadow .16s ease;}
.gv-slot input:checked{border-color:var(--p);background:var(--p);box-shadow:0 2px 7px rgba(191,52,9,.22);}
.gv-slot input:checked::after{content:"";width:10px;height:6px;border-left:2px solid #fff;border-bottom:2px solid #fff;transform:rotate(-45deg);margin-top:-2px;}
.gv-slot input:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(191,52,9,.16);}
.gv-slot span{font-weight:700;font-size:13px;}
.gv-slot:has(input:checked){border-color:rgba(191,52,9,.46);background:var(--p-soft);box-shadow:inset 0 0 0 1px rgba(191,52,9,.12);}
.slot-admin{background:#fff;border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh);padding:12px;display:flex;flex-direction:column;gap:12px;}
.slot-add{display:grid;grid-template-columns:1fr 104px 104px auto;gap:8px;align-items:center;background:var(--p-soft);border:1px dashed rgba(191,52,9,.28);border-radius:var(--r-sm);padding:10px;}
.slot-add label{display:flex;flex-direction:column;gap:4px;min-width:0;}
.slot-add label span{font-size:10.5px;font-weight:800;color:var(--muted);text-transform:uppercase;letter-spacing:.2px;}
.slot-note{font-size:12.5px;color:var(--muted);background:var(--neutral-bg);border-radius:var(--r-sm);padding:9px 10px;line-height:1.35;}
.slot-list{display:flex;flex-direction:column;gap:12px;}
.slot-day-group{border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:#fff;box-shadow:var(--sh);}
.slot-day-head{display:flex;align-items:center;justify-content:space-between;gap:8px;background:var(--p-soft);color:var(--pt);font-size:13.5px;font-weight:800;padding:10px 12px;}
.slot-day-head span{background:#fff;border-radius:var(--pill);padding:4px 9px;font-size:11.5px;color:var(--muted);font-weight:800;}
.slot-row{display:grid;grid-template-columns:64px minmax(96px,1fr) minmax(96px,1fr) auto auto;gap:8px;align-items:end;padding:10px 12px;border-top:1px solid var(--divider);}
.slot-row:first-of-type{border-top:0;}
.slot-ca-chip{align-self:center;display:inline-flex;align-items:center;justify-content:center;min-height:34px;border-radius:var(--pill);background:var(--blue-bg);color:var(--blue);font-size:12px;font-weight:800;white-space:nowrap;}
.slot-row label{display:flex;flex-direction:column;gap:4px;min-width:0;}
.slot-row label span{font-size:10.5px;font-weight:800;color:var(--muted);text-transform:uppercase;letter-spacing:.2px;}
.slot-row input,.slot-row select,.slot-add input,.slot-add select{width:100%;min-width:0;padding:10px;border:1px solid var(--line);border-radius:var(--r-sm);background:#fff;font-size:13px;}
@media (max-width:430px){
  .slot-add{grid-template-columns:1fr 1fr;}
  .slot-add label:first-child,.slot-add button{grid-column:1/-1;}
  .slot-row{grid-template-columns:64px 1fr 1fr;}
  .slot-row button{grid-column:auto;}
}
.admin-actions{display:flex;gap:6px;position:sticky;right:0;background:#fff;box-shadow:-8px 0 12px rgba(255,255,255,.86);}
.ddtn-action.danger{background:var(--red-bg);color:var(--red);border-color:transparent;}
#admin-msg{font-size:13px;min-height:18px;}
.hv-card.hv-low{border-color:rgba(214,125,10,.42);background:linear-gradient(0deg,rgba(255,246,226,.7),#fff);}
.hv-low-tag{display:inline-block;font-size:10.5px;font-weight:800;color:var(--amber);background:var(--amber-bg);border-radius:var(--pill);padding:2px 8px;}

/* ---------- PHỤ HUYNH MANAGEMENT ---------- */
.ph-row{border:1px solid var(--line);border-radius:var(--r);background:#fff;padding:12px 14px;margin-bottom:10px;display:flex;flex-direction:column;gap:8px;}
.ph-row-info{display:flex;align-items:baseline;gap:8px;}
.ph-row-info b{color:var(--muted);font-size:12px;font-weight:800;}
.ph-row-info span{font-size:14px;font-weight:600;color:var(--ink);}
.ph-emails{display:flex;flex-wrap:wrap;gap:6px;min-height:24px;}
.ph-email-tag{display:inline-flex;align-items:center;gap:5px;background:var(--p-soft);color:var(--pt);border-radius:var(--pill);padding:4px 10px;font-size:12.5px;font-weight:700;}
.ph-email-del{background:none;border:none;cursor:pointer;color:var(--pt);font-size:16px;line-height:1;padding:0 2px;opacity:.6;}
.ph-email-del:hover{opacity:1;}
.ph-none{font-size:12px;color:var(--muted);font-style:italic;}
.ph-add-row{display:flex;gap:8px;align-items:center;}
.ph-email-inp{flex:1;min-width:0;padding:9px 11px;border:1px solid var(--line);border-radius:var(--r-sm);font-size:13px;}

/* ---------- CHẾ ĐỘ TOÀN MÀN HÌNH: đè lên cả trang như một app mobile ---------- */
html.ddtn-fs, body.ddtn-fs{margin:0 !important;padding:0 !important;height:100%;overflow:hidden !important;background:#dfe2e6;overscroll-behavior:none;}
html.ddtn-fs #wpadminbar{display:none !important;}                 /* ẩn thanh admin WordPress nếu có */
html.ddtn-fs::before{content:"";position:fixed;inset:0;background:#dfe2e6;z-index:2147482999;}  /* phủ kín nền trang */
html.ddtn-fs #ddtn-root{position:fixed;inset:0;margin:0;height:100%;min-height:0;max-width:none;
  overflow-y:auto;overflow-x:hidden;-webkit-overflow-scrolling:touch;overscroll-behavior:contain;
  z-index:2147483000;}
/* full chiều ngang trên mọi màn (cả desktop) → header & footer cũng trải hết bề rộng */
html.ddtn-fs .ddtn-top, html.ddtn-fs .ddtn-tabs{left:0;transform:none;max-width:none;width:100%;}

/* ===================== V3.10.0 — TRẠNG THÁI "VẮNG KHÔNG PHÉP" ===================== */
.b.s-vangkp{background:#f0e4f7;color:#6d28a8;}
.ddtn-badge.s-vangkp{background:#f0e4f7;color:#6d28a8;}
.bt.on.s-vangkp{background:#f0e4f7;color:#6d28a8;border-color:#6d28a8;}

/* ===================== V3.10.0 — SẮP XẾP LỊCH HỌC TỔNG QUÁT ===================== */
.arr-open-btn{width:100%;}
.arr-hint{background:var(--blue-bg);color:var(--blue);border-radius:var(--r-sm);padding:10px 12px;font-size:13px;line-height:1.5;margin-bottom:10px;}
.arr-box .ddtn-msg{margin:0 0 8px;padding:8px 12px;border-radius:var(--r-sm);font-size:13px;font-weight:600;display:none;}
.arr-box .ddtn-msg.ok{background:#e3f3e2;color:#1f7a3a;}
.arr-box .ddtn-msg.err{background:var(--red-bg);color:var(--red);}
.arr-pick{position:sticky;top:0;z-index:20;background:#fff7e0;border:1px solid #ffe08a;color:#8a6d1d;border-radius:var(--r-sm);padding:8px 12px;font-size:13px;margin-bottom:10px;box-shadow:var(--sh-bar);}
.arr-pick button{border:1px solid #ffe08a;background:#fff;border-radius:var(--pill);padding:3px 12px;font-size:12px;font-weight:600;color:#8a6d1d;cursor:pointer;margin-left:6px;}
.arr-day{margin:14px 0 4px;}
.arr-day-h{font-size:14px;font-weight:800;color:var(--ink);text-transform:uppercase;letter-spacing:.4px;margin-bottom:6px;padding-left:2px;}
.arr-slot{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh);padding:10px;margin-bottom:10px;}
.arr-slot-h{font-size:13px;font-weight:700;color:var(--blue);margin-bottom:8px;}
.arr-cells{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px;}
.arr-cell{border:1.5px dashed var(--line2);border-radius:var(--r-sm);padding:8px;min-height:64px;background:#fbfcfc;transition:border-color .12s, background .12s;}
.arr-cell.over{border-color:var(--blue);background:var(--blue-bg);}
.arr-cell.full{border-color:#f3b0ab;background:#fff6f5;}
.arr-cell.off{opacity:.55;background:var(--neutral-bg);}
.arr-cell-h{display:flex;justify-content:space-between;align-items:center;gap:6px;font-size:12px;font-weight:700;color:var(--ink);margin-bottom:6px;}
.arr-cell-h small{font-weight:500;color:var(--muted2);}
.arr-count{font-size:11px;font-weight:700;color:var(--muted2);background:var(--neutral-bg);border-radius:var(--pill);padding:1px 8px;flex:none;}
.arr-count.max{background:var(--red-bg);color:var(--red);}
.arr-tags{display:flex;flex-wrap:wrap;gap:5px;}
.arr-empty{color:var(--muted2);font-size:12px;}
.arr-tag{display:inline-block;font-size:12px;font-weight:600;line-height:1.3;padding:4px 10px;border-radius:var(--pill);background:#fff;border:1px solid var(--line);color:var(--ink);cursor:grab;user-select:none;-webkit-user-select:none;touch-action:manipulation;}
.arr-tag.warn{background:#fff3cd;border-color:#ffe08a;color:#8a6d1d;}
.arr-tag.dragging{opacity:.4;}
.arr-tag.sel{background:var(--blue);border-color:var(--blue);color:#fff;box-shadow:0 0 0 3px var(--blue-bg);}