:root{
  --brand:#b3261e; --brand-d:#8c1d18; --brand-soft:#fdecea; --gold:#f6d365;
  --bg:#f5f3f2; --card:#fff; --text:#1f1f1f; --muted:#5f6368; --line:#dfdcdb;
  --err:#c5221f; --ok:#188038; --radius:12px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.55 "Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;-webkit-tap-highlight-color:transparent}
a{color:var(--brand)}
.muted{color:var(--muted)} .small{font-size:13px} .center{text-align:center} .nowrap{white-space:nowrap}
/* ô nhập >= 16px để iPhone không tự phóng to khi bấm vào */
input,select,textarea,button{font-size:16px}

/* ================= FORM ================= */
.wrap{max-width:720px;margin:0 auto;padding:20px 16px calc(48px + env(safe-area-inset-bottom))}
.wrap.narrow{max-width:420px;padding-top:10vh}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px;margin-bottom:12px}
.card.head{border:none;padding:0;overflow:hidden;box-shadow:0 1px 3px rgba(0,0,0,.08)}
.card.head .org{margin:0;padding:18px 24px 16px;background:linear-gradient(135deg,var(--brand),var(--brand-d));color:#fff;
  font-weight:700;font-size:15px;letter-spacing:.3px;text-align:center;text-transform:uppercase;line-height:1.4}
.card.head .org::after{content:"";display:block;width:56px;height:2px;background:var(--gold);margin:10px auto 0;border-radius:2px}
.card.head h1{margin:0;padding:20px 24px 6px;font-size:24px;font-weight:700;line-height:1.3;color:var(--brand-d);text-align:center}
.card.head .desc{margin:0;padding:6px 24px 0;color:var(--muted);font-size:15px;text-align:center}
.card.head .req-note{margin:16px 24px 0;padding:12px 0 16px;border-top:1px solid var(--line);color:var(--err);font-size:14px}
.card.head > :last-child{padding-bottom:20px}
.card.head .req-note:last-child{padding-bottom:16px}
.login .org{margin:0 0 14px;color:var(--brand);font-weight:700;font-size:13px;text-transform:uppercase;text-align:center}
.star{color:var(--err)}
.card.section{background:var(--brand-soft);border-color:#f3c7c3;border-left:5px solid var(--brand)}
.card.section h2{margin:0;font-size:18px;font-weight:700;color:var(--brand-d)}
.card.section .help{margin:4px 0 0}
.card.alert{border-color:var(--err);color:var(--err);background:#fce8e6}
.q.has-err{border-color:var(--err);box-shadow:0 0 0 1px var(--err) inset}
.qlabel{display:block;font-size:16px;font-weight:600;margin-bottom:8px}
.help{margin:0 0 8px;color:var(--muted);font-size:14px}
.inp{width:100%;font:inherit;color:inherit;border:1px solid var(--line);border-radius:8px;padding:11px 12px;background:#fff;outline:none;transition:border-color .15s,box-shadow .15s;-webkit-appearance:none;appearance:none}
.inp:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(179,38,30,.15)}
textarea.inp{resize:vertical;min-height:110px}
.sel{background:#fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%235f6368' stroke-width='2' fill='none'/%3E%3C/svg%3E") no-repeat right 14px center;padding-right:36px}
.opts{display:flex;flex-direction:column;gap:6px;margin-top:4px}
.opt{display:flex;align-items:center;gap:12px;padding:11px 12px;cursor:pointer;border:1px solid var(--line);border-radius:8px;min-height:48px}
.opt:has(input:checked){border-color:var(--brand);background:var(--brand-soft)}
.opt input[type=radio],.opt input[type=checkbox]{width:20px;height:20px;accent-color:var(--brand);margin:0;flex:none}
.opt.other{flex-wrap:wrap}
.opt .inline{flex:1;min-width:140px;padding:7px 10px}
.scale{display:grid;grid-template-columns:auto 1fr auto;grid-template-areas:"min row max";align-items:center;gap:10px;margin-top:6px}
.scale-row{grid-area:row;display:flex;gap:6px;justify-content:space-between}
.sc{flex:1;max-width:64px;position:relative;cursor:pointer}
.sc input{position:absolute;opacity:0;inset:0;margin:0;cursor:pointer}
.sc span{display:flex;align-items:center;justify-content:center;height:46px;border:1px solid var(--line);border-radius:8px;font-weight:600;transition:.15s}
.sc input:checked + span,.sc:has(input:checked) span{background:var(--brand);color:#fff;border-color:var(--brand)}
.sc input:focus-visible + span{box-shadow:0 0 0 3px rgba(179,38,30,.25)}
.sl{font-size:13px;color:var(--muted);max-width:110px;line-height:1.3}
.sl:first-child{grid-area:min;text-align:right}
.sl:last-child{grid-area:max}
.err{color:var(--err);font-size:14px;margin:8px 0 0}
.actions{display:flex;justify-content:space-between;align-items:center;margin-top:20px;gap:12px}
.btn{display:inline-flex;align-items:center;justify-content:center;background:var(--brand);color:#fff;border:none;border-radius:8px;padding:12px 26px;font:inherit;font-weight:600;cursor:pointer;text-decoration:none;min-height:46px}
.btn:hover{background:var(--brand-d)}
.btn.ghost{background:transparent;color:var(--brand)}
.btn.ghost:hover{background:var(--brand-soft)}
.btn.sm{padding:7px 14px;font-size:14px;min-height:38px}
.btn.danger{background:var(--err)}
.thanks{font-size:17px;margin:0 0 14px;text-align:center}
.thanks::before{content:"✓";display:block;width:56px;height:56px;line-height:56px;margin:0 auto 12px;border-radius:50%;background:#e6f4ea;color:var(--ok);font-size:28px;font-weight:700}
.thanks + .link{display:block;text-align:center}
.link{font-size:14px}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.login h1{margin:0;font-size:22px;font-weight:700;text-align:center}
.login .help{text-align:center}
.login .inp{margin:12px 0 16px}
.login .btn{width:100%}

/* tải tệp */
.drop{display:flex;flex-direction:column;align-items:center;gap:2px;text-align:center;border:2px dashed #d9b3b0;border-radius:10px;padding:18px 14px;cursor:pointer;background:#fffafa;position:relative;transition:.15s}
.drop:hover,.drop:focus-within{border-color:var(--brand);background:var(--brand-soft)}
.drop input{position:absolute;inset:0;opacity:0;cursor:pointer;width:100%}
.drop-ic{font-size:26px;color:var(--brand);line-height:1}
.drop-t{font-size:15px}
.drop-t b{color:var(--brand)}
.drop-s{font-size:13px;color:var(--muted)}
.files{list-style:none;margin:10px 0 0;padding:0;display:flex;flex-direction:column;gap:6px}
.files li{display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:8px;padding:6px 6px 6px 12px;font-size:14px;background:#fff}
.files li.bad{border-color:var(--err);background:#fce8e6}
.files li.warn{border:none;background:none;color:var(--err);padding:2px 0}
.files .fn{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.files .fs{color:var(--muted);font-size:13px;flex:none}
.files button{flex:none;width:36px;height:36px;border:none;background:none;color:var(--muted);border-radius:6px;cursor:pointer;font-size:15px}
.files button:hover{background:#f1efee;color:var(--err)}
.btn:disabled{opacity:.7;cursor:wait}
.att{list-style:none;margin:6px 0 0;padding:0;display:flex;flex-direction:column;gap:6px}
.att a{display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:8px;padding:8px 12px;text-decoration:none;color:var(--text);font-size:14px}
.att a:hover{border-color:var(--brand);background:var(--brand-soft)}
.att .fn{flex:1;min-width:0;overflow-wrap:anywhere}
.att .fs{color:var(--muted);font-size:13px;flex:none}
.att img{width:56px;height:56px;object-fit:cover;border-radius:6px;flex:none;background:#eee}
.clip{color:var(--muted);font-size:13px;white-space:nowrap}

/* ================= DASHBOARD ================= */
.topbar{background:linear-gradient(135deg,var(--brand),var(--brand-d));color:#fff;position:sticky;top:0;z-index:5;box-shadow:0 1px 4px rgba(0,0,0,.15)}
.tb-inner{max-width:1200px;margin:0 auto;padding:10px 16px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand{font-weight:700;font-size:16px;display:flex;align-items:center;gap:10px;min-width:0}
.bt-txt{display:flex;flex-direction:column;min-width:0;line-height:1.3}
.bt-txt small{font-size:11px;font-weight:600;opacity:.85;text-transform:uppercase;letter-spacing:.3px}
.logo{background:rgba(255,255,255,.18);border-radius:8px;width:34px;height:34px;display:inline-grid;place-items:center;font-size:18px;flex:none}
.tb-actions{display:flex;gap:16px;font-size:14px;flex:none}
.tb-actions a{text-decoration:none;color:#fff;opacity:.95}
.dash{max-width:1200px;margin:0 auto;padding:16px 16px calc(48px + env(safe-area-inset-bottom))}
.filters{display:flex;flex-wrap:wrap;gap:10px 14px;align-items:center;margin-bottom:14px;font-size:14px}
.filters label{display:flex;align-items:center;gap:6px;color:var(--muted)}
.filters input[type=date]{font:inherit;font-size:15px;border:1px solid var(--line);border-radius:8px;padding:6px 8px;background:#fff;color:var(--text);min-height:38px}
.filters .right{margin-left:auto;border:1px solid var(--brand)}
.kpis{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:12px}
.kpi{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px}
.kpi .k{display:block;color:var(--muted);font-size:13px}
.kpi b{font-size:28px;font-weight:700;line-height:1.3}
.kpi b.sm{font-size:17px}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;margin-bottom:12px}
.panel h3{margin:0 0 4px;font-size:16px;font-weight:700}
.panel.empty{text-align:center;color:var(--muted);padding:40px}
.spark{display:flex;align-items:flex-end;gap:6px;height:140px;margin-top:10px}
.spark .col{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;height:100%;min-width:0}
.spark .bar{width:100%;max-width:36px;background:var(--brand);border-radius:4px 4px 0 0;min-height:2px}
.spark .v{font-size:12px;color:var(--muted);height:18px}
.spark .d{font-size:11px;color:var(--muted);margin-top:4px;white-space:nowrap}
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin:18px 0 12px;overflow-x:auto;-webkit-overflow-scrolling:touch}
.tabs a{padding:10px 16px;text-decoration:none;color:var(--muted);border-bottom:3px solid transparent;font-weight:600;white-space:nowrap}
.tabs a.on{color:var(--brand);border-color:var(--brand)}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.grid .panel{margin:0}
.grid .panel.wide{grid-column:1/-1}
.bars{margin-top:12px;display:flex;flex-direction:column;gap:8px}
.brow{display:grid;grid-template-columns:minmax(90px,38%) 1fr 72px;align-items:center;gap:10px;font-size:14px}
.bl{overflow-wrap:anywhere}
.bl i{color:var(--muted);font-style:normal;font-size:12px}
.bt{background:#f1efee;border-radius:4px;height:22px;overflow:hidden}
.bf{display:block;height:100%;background:var(--brand);border-radius:4px}
.bn{text-align:right;font-variant-numeric:tabular-nums;font-weight:700}
.bn small{color:var(--muted);font-weight:400}
.avg{color:var(--brand);font-size:15px}
.others{margin-top:10px;font-size:14px}
.others summary{cursor:pointer;color:var(--brand)}
.texts{list-style:none;margin:10px 0 0;padding:0;max-height:360px;overflow:auto}
.texts li{background:#faf8f7;border-radius:8px;padding:9px 12px;margin-bottom:6px;font-size:14px}
.texts a{color:inherit;text-decoration:none}
.search{display:flex;gap:10px;margin-bottom:12px}
.search .inp{padding:8px 12px}
.table-wrap{overflow-x:auto}
.tbl{width:100%;border-collapse:collapse;font-size:14px}
.tbl th{text-align:left;color:var(--muted);font-weight:600;border-bottom:1px solid var(--line);padding:8px 10px;white-space:nowrap}
.tbl td{border-bottom:1px solid #eee;padding:9px 10px;vertical-align:top}
.tbl tbody tr{cursor:pointer}
.tbl tbody tr:hover{background:#faf8f7}
.paging{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}
.paging a{padding:6px 12px;border:1px solid var(--line);border-radius:8px;text-decoration:none;font-size:14px}
.paging a.on{background:var(--brand);color:#fff;border-color:var(--brand)}
.detail-head{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-bottom:12px}
.detail-head .pager{margin-left:auto;display:flex;gap:6px}
.detail{margin:0 0 14px}
.detail dt{font-weight:600;font-size:14px;color:var(--muted);margin-top:14px}
.detail dd{margin:4px 0 0;padding-bottom:10px;border-bottom:1px solid #eee;overflow-wrap:anywhere}
.ok{color:var(--ok);margin:0 0 10px}

/* ================= ĐIỆN THOẠI ================= */
@media (max-width:640px){
  .wrap{padding:12px 12px calc(32px + env(safe-area-inset-bottom))}
  .card{padding:18px 16px;margin-bottom:10px}
  .card.head .org{padding:16px 14px 14px;font-size:14px}
  .card.head h1{padding:16px 16px 4px;font-size:21px}
  .card.head .desc{padding:4px 16px 0;font-size:14px}
  .card.head .req-note{margin:14px 16px 0}
  .card.head > :last-child{padding-bottom:16px}
  /* thang điểm: nút số trải hết chiều ngang, nhãn 2 đầu nằm dưới */
  .scale{grid-template-columns:1fr 1fr;grid-template-areas:"row row" "min max";gap:8px}
  .scale-row{gap:6px}
  .sc{max-width:none}
  .sl{max-width:none}
  .sl:first-child{text-align:left}
  .sl:last-child{text-align:right}
  .actions{flex-direction:column-reverse;align-items:stretch}
  .actions .btn{width:100%}
  .actions .btn.ghost{min-height:40px;font-weight:500;font-size:15px}

  .tb-inner{padding:8px 12px}
  .brand{font-size:14px}
  .bt-txt small{font-size:10px}
  .logo{width:30px;height:30px;font-size:16px}
  .tb-actions{flex-direction:column;gap:2px;font-size:13px;text-align:right}
  .dash{padding:12px 12px calc(32px + env(safe-area-inset-bottom))}
  .filters{display:grid;grid-template-columns:1fr 1fr;gap:8px}
  .filters label{flex-direction:column;align-items:stretch;gap:2px;font-size:12px}
  .filters input[type=date]{width:100%}
  .filters .btn,.filters .right{grid-column:span 1;margin:0}
  .filters .link{align-self:center;text-align:center}
  .kpis{grid-template-columns:1fr 1fr;gap:8px}
  .kpi{padding:12px}
  .kpi b{font-size:24px}
  .kpi b.sm{font-size:15px}
  .panel{padding:14px 12px}
  .spark{gap:2px;height:120px}
  .spark .v{font-size:10px}
  .spark .d{font-size:9px;writing-mode:vertical-rl;transform:rotate(180deg);height:34px}
  .grid{grid-template-columns:1fr;gap:10px}
  .brow{grid-template-columns:1fr 64px;grid-template-areas:"l n" "t t";gap:4px 8px}
  .bl{grid-area:l} .bn{grid-area:n} .bt{grid-area:t;height:14px}
  .tabs a{padding:10px 12px;font-size:15px}
  .detail-head .pager{margin-left:0;width:100%}
  .detail-head .pager .btn{flex:1}
  /* bảng danh sách -> dạng thẻ */
  .tbl.cards thead{display:none}
  .tbl.cards,.tbl.cards tbody,.tbl.cards tr,.tbl.cards td{display:block;width:100%}
  .tbl.cards tr{border:1px solid var(--line);border-radius:10px;padding:10px 12px;margin-bottom:10px;position:relative}
  .tbl.cards td{border:none;padding:2px 0}
  .tbl.cards td.c-no{position:absolute;right:12px;top:10px;width:auto;font-size:13px}
  .tbl.cards td.c-time{font-weight:700;color:var(--brand-d);margin-bottom:4px}
  .tbl.cards td[data-label]::before{content:attr(data-label) ": ";color:var(--muted);font-size:13px}
  .tbl.cards td[data-label]:empty{display:none}
  .tbl.cards td.c-go{margin-top:6px;padding-top:8px;border-top:1px solid #eee}
}