/* Dandi Art — app "Việc của tôi" (giáo viên/trợ giảng) */
:root{
  --cam:#f79420; --vang:#ffcb04; --ngoc:#00ab80; --sanho:#ef4f5e; --tim:#6b4eff;
  --bg:#fff8f1; --card:#fff; --ink:#2b2535; --muted:#7e7889; --line:#f0e7dc;
  --r:18px; --sh:0 6px 22px rgba(120,80,30,.08);
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);
  font:15.5px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
h1,h2,h3{margin:0 0 .5em}
h1{font-size:22px}h2{font-size:18px}h3{font-size:15.5px;margin-top:18px}
.muted{color:var(--muted);font-weight:400}
.sm{font-size:13px}
.hide{display:none!important}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px;box-shadow:var(--sh);margin-bottom:12px}

/* login */
.login{min-height:100dvh;display:grid;place-items:center;padding:20px;
  background:linear-gradient(160deg,#fff5e8,#fff0f3 60%,#f3f0ff)}
.login .box{width:100%;max-width:370px;background:#fff;border-radius:22px;padding:26px 22px;box-shadow:0 16px 44px rgba(90,60,20,.14);text-align:center}
.login img{height:46px;margin-bottom:8px}
.login h1{margin-bottom:2px}
.login p{margin:0 0 16px}
label{display:block;text-align:left;font-size:12.5px;color:var(--muted);font-weight:600;margin-bottom:10px}
input,select,textarea{width:100%;margin-top:5px;padding:12px 13px;border:1px solid var(--line);
  border-radius:13px;font:inherit;font-size:16px;background:#fffdfa;color:var(--ink)}
input:focus,select:focus,textarea:focus{outline:none;border-color:#f6c98d;box-shadow:0 0 0 3px #fff3e0}
.btn{width:100%;border:0;border-radius:13px;padding:14px;font:inherit;font-size:15.5px;font-weight:700;color:#fff;
  background:linear-gradient(95deg,var(--cam),#ef7a3d);cursor:pointer;box-shadow:0 6px 16px rgba(247,148,32,.28)}
.btn.ghost{background:#fff;color:#8a5a12;border:1.5px solid var(--line);box-shadow:none}
.btn.ngoc{background:linear-gradient(95deg,var(--ngoc),#00926d);box-shadow:0 6px 16px rgba(0,171,128,.25)}
.btn.sanho{background:linear-gradient(95deg,var(--sanho),#e0364a);box-shadow:0 6px 16px rgba(239,79,94,.25)}
.btn:disabled{opacity:.55;box-shadow:none}
.msg{margin-top:10px;font-size:13.5px;color:var(--sanho);min-height:18px}
.msg.ok{color:var(--ngoc)}

/* header + tabs */
#app{max-width:640px;margin:0 auto;padding:0 14px 90px}
.top{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:14px 0 10px;position:sticky;top:0;
  background:linear-gradient(var(--bg) 70%,rgba(255,248,241,0));z-index:5}
.hello{display:flex;align-items:center;gap:8px;font-size:16px}
.pill{background:#fff3e0;color:#a4620d;border-radius:999px;padding:2px 10px;font-size:12px;font-weight:700}
.out{border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 14px;font:inherit;font-size:13.5px;color:#8a5a12}
nav.tabs{display:flex;gap:6px;overflow-x:auto;padding:2px 0 12px;scrollbar-width:none}
nav.tabs::-webkit-scrollbar{display:none}
nav.tabs button{flex:0 0 auto;border:1px solid var(--line);background:#fff;border-radius:999px;padding:9px 14px;
  font:inherit;font-size:14px;color:#6b6478}
nav.tabs button.on{background:linear-gradient(95deg,var(--cam),#ef7a3d);color:#fff;border-color:transparent;font-weight:700}
nav.tabs i{font-style:normal;background:#fff;color:#c2400f;border-radius:999px;padding:0 6px;font-size:11.5px;margin-left:4px}
nav.tabs button.on i{background:rgba(255,255,255,.28);color:#fff}

/* list */
.list{display:grid;gap:10px}
.item{background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px;box-shadow:var(--sh)}
.item .t{font-weight:700;font-size:15.5px}
.item .s{color:var(--muted);font-size:13.5px;margin-top:3px}
.item .r{display:flex;gap:8px;margin-top:10px}
.item .r .btn{padding:11px;font-size:14.5px}
.tag{display:inline-block;border-radius:999px;padding:2px 9px;font-size:11.5px;font-weight:700;margin-right:6px}
.tag.hvt{background:#eaf3ff;color:#1e5fa8}.tag.q7{background:#fff0f5;color:#b03a6a}
.tag.ok{background:#e7f8f1;color:#0c7a58}.tag.wait{background:#fff4e2;color:#9c5f0b}
.empty{color:var(--muted);font-size:14px;padding:10px 2px}
.stu{display:flex;align-items:center;gap:10px;padding:11px 12px;border:1px solid var(--line);border-radius:13px;background:#fff}
.stu.done{opacity:.55;background:#f7fff9;border-color:#cdeedd}
.stu .nm{flex:1;font-size:15px}
.stu .chk{color:var(--ngoc);font-weight:700}
.stats{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.stat{background:#fff8ef;border:1px solid var(--line);border-radius:14px;padding:12px;text-align:center}
.stat b{display:block;font-size:22px;color:#b4620a}
.stat span{font-size:12.5px;color:var(--muted)}

/* modal */
.modal{position:fixed;inset:0;background:rgba(40,25,10,.45);z-index:50;display:grid;place-items:end center;padding:0}
.modal .sheet{background:var(--bg);width:100%;max-width:640px;border-radius:20px 20px 0 0;padding:18px 16px 26px;
  max-height:92dvh;overflow:auto;box-shadow:0 -8px 30px rgba(0,0,0,.2)}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
@media(min-width:620px){ .modal{place-items:center} .modal .sheet{border-radius:20px} }