:root{
  --bg:#f6f4ef; --panel:#fff; --ink:#1d1b2e; --muted:#6c6879; --line:#e6e2d9;
  --accent:#e2611b; --accent-soft:#fdeee4; --green:#128c4a; --green-soft:#e4f5ea;
  --red:#c2362b; --red-soft:#fbe6e3; --amber:#a86a00; --amber-soft:#fdf2d8; --indigo:#2e3a8c;
  --radius:12px; --shadow:0 1px 2px rgba(0,0,0,.04),0 4px 16px rgba(0,0,0,.04);
}
*{box-sizing:border-box}
body{margin:0;font-family:Mukta,system-ui,sans-serif;background:var(--bg);color:var(--ink);font-size:15px}
.hidden{display:none!important}
a{color:var(--indigo)}
h1{font-size:24px;margin:0 0 4px}
h2{font-size:17px;margin:0 0 12px}
.sub{color:var(--muted);margin:0 0 20px}
input,select,textarea{font:inherit;padding:8px 10px;border:1px solid var(--line);border-radius:8px;background:#fff;width:100%;color:var(--ink)}
textarea{min-height:80px;resize:vertical}
input:focus,select:focus,textarea:focus{outline:2px solid var(--accent-soft);border-color:var(--accent)}
label{display:block;font-weight:500;font-size:14px;margin-bottom:12px}
label input,label select,label textarea{margin-top:4px}
.btn{font:inherit;font-weight:600;border:1px solid var(--line);background:#fff;padding:7px 14px;border-radius:8px;cursor:pointer;color:var(--ink);white-space:nowrap}
.btn:hover{background:#faf8f4}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
.btn.primary:hover{filter:brightness(.95)}
.btn.danger{color:var(--red)}
.btn.ghost{background:transparent;border-color:transparent;color:var(--muted)}
.btn.sm{padding:3px 10px;font-size:13px}
.btn.wide{width:100%}
.err{color:var(--red);min-height:1em;margin:0 0 8px;font-size:14px}

/* login */
.login{min-height:100vh;display:grid;place-items:center;padding:16px}
.login-card{background:var(--panel);padding:28px;border-radius:16px;box-shadow:var(--shadow);width:100%;max-width:360px}
.brand{display:flex;gap:10px;align-items:center;margin-bottom:20px}
.brand b{display:block;font-size:17px}.brand small{color:var(--muted)}
.logo{width:38px;height:38px;border-radius:10px;background:var(--accent);color:#fff;display:grid;place-items:center;font-weight:700;font-size:18px}

/* layout */
.app{display:grid;grid-template-columns:230px 1fr;min-height:100vh}
.side{background:#1d1b2e;color:#fff;padding:20px 14px;display:flex;flex-direction:column;position:sticky;top:0;height:100vh}
.side .brand small{color:#a9a5b8}
.side nav{display:flex;flex-direction:column;gap:2px;flex:1}
.side nav a{color:#d8d5e3;text-decoration:none;padding:9px 12px;border-radius:8px;cursor:pointer}
.side nav a:hover{background:#2c2a40}
.side nav a.active{background:var(--accent);color:#fff}
.side .btn.ghost{color:#a9a5b8}
main{padding:28px;max-width:1200px;width:100%}

.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:14px;margin-bottom:20px}
.card{background:var(--panel);border-radius:var(--radius);padding:16px 18px;box-shadow:var(--shadow);border:1px solid var(--line)}
.card .num{font-size:28px;font-weight:700;line-height:1.1}
.card .lbl{color:var(--muted);font-size:14px}
.panel{background:var(--panel);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);border:1px solid var(--line);margin-bottom:18px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.banner{padding:12px 16px;border-radius:10px;margin-bottom:18px;font-size:14px}
.banner.warn{background:var(--amber-soft);color:#6b4500}
.banner.ok{background:var(--green-soft);color:#0b5e31}
.banner.info{background:#eceefa;color:#2e3a8c}

table{width:100%;border-collapse:collapse;font-size:14px}
th{text-align:left;color:var(--muted);font-weight:500;padding:8px;border-bottom:1px solid var(--line);white-space:nowrap}
td{padding:9px 8px;border-bottom:1px solid var(--line);vertical-align:middle}
tr:last-child td{border-bottom:none}
.table-wrap{overflow-x:auto}
.pill{display:inline-block;padding:1px 9px;border-radius:999px;font-size:12px;font-weight:600}
.pill.notes{background:#e8edfb;color:#2e3a8c}.pill.imp{background:var(--amber-soft);color:var(--amber)}
.pill.pyq{background:#f3e7fb;color:#6e2d91}.pill.test{background:var(--green-soft);color:var(--green)}
.pill.info{background:#eceefa;color:#2e3a8c}.pill.warn{background:var(--amber-soft);color:var(--amber)}.pill.error{background:var(--red-soft);color:var(--red)}
.muted{color:var(--muted)}
.actions{display:flex;gap:6px;justify-content:flex-end}
.toolbar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:14px;align-items:center}
.toolbar input,.toolbar select{width:auto;flex:1;min-width:140px}
.head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;flex-wrap:wrap}

.switch{position:relative;display:inline-block;width:40px;height:22px;flex:none}
.switch input{opacity:0;width:0;height:0}
.switch span{position:absolute;inset:0;background:#cfcbd8;border-radius:22px;cursor:pointer;transition:.2s}
.switch span:before{content:"";position:absolute;width:16px;height:16px;left:3px;top:3px;background:#fff;border-radius:50%;transition:.2s}
.switch input:checked+span{background:var(--green)}
.switch input:checked+span:before{transform:translateX(18px)}
.row{display:flex;align-items:center;gap:10px}

.bars{display:flex;align-items:flex-end;gap:6px;height:140px;padding-top:8px}
.bars .b{flex:1;max-width:44px;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;height:100%;font-size:11px;color:var(--muted)}
.bars .b i{display:block;width:100%;background:var(--accent);border-radius:4px 4px 0 0;min-height:2px}

/* subjects */
.subject{border:1px solid var(--line);border-radius:10px;margin-bottom:10px;background:#fff}
.subject summary{padding:12px 14px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;list-style:none}
.subject summary::-webkit-details-marker{display:none}
.subject .body{padding:0 14px 12px}
.chapter{display:flex;align-items:center;gap:8px;padding:6px 0;border-top:1px dashed var(--line)}
.chapter .name{flex:1}

/* tester */
.phone{max-width:420px;background:#e5ddd5;border-radius:16px;overflow:hidden;border:1px solid var(--line)}
.phone .top{background:#075e54;color:#fff;padding:12px 16px;font-weight:600;display:flex;justify-content:space-between;align-items:center}
.chat{height:460px;overflow-y:auto;padding:12px;display:flex;flex-direction:column;gap:6px}
.msg{max-width:85%;padding:7px 10px;border-radius:8px;white-space:pre-wrap;font-size:14px;line-height:1.4;box-shadow:0 1px 1px rgba(0,0,0,.08)}
.msg.in{background:#fff;align-self:flex-start}
.msg.out{background:#dcf8c6;align-self:flex-end}
.msg.doc{background:#fff;align-self:flex-start;border-left:4px solid var(--red)}
.msg .btns{display:flex;flex-direction:column;gap:4px;margin-top:8px}
.msg .btns button{font:inherit;border:none;border-top:1px solid #eee;background:#fff;color:#0a7cff;padding:6px;cursor:pointer}
.compose{display:flex;gap:6px;padding:8px;background:#f0f0f0}
.compose input{border-radius:20px}

/* modal / toast */
.modal{position:fixed;inset:0;background:rgba(20,18,30,.45);display:grid;place-items:center;padding:16px;z-index:10}
.modal-card{background:#fff;border-radius:14px;padding:22px;width:100%;max-width:520px;max-height:90vh;overflow-y:auto}
.modal-card .foot{display:flex;justify-content:flex-end;gap:8px;margin-top:8px}
.toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%) translateY(80px);background:var(--ink);color:#fff;padding:10px 18px;border-radius:10px;transition:.25s;z-index:20;max-width:90vw}
.toast.show{transform:translateX(-50%) translateY(0)}
.toast.bad{background:var(--red)}
.or{text-align:center;color:var(--muted);font-size:13px;margin:-4px 0 8px}
.hint{font-size:13px;color:var(--muted);font-weight:400}
code{background:#f1eee7;padding:1px 6px;border-radius:5px;font-size:13px;word-break:break-all}

@media (max-width:820px){
  .app{grid-template-columns:1fr}
  .side{position:static;height:auto;padding:12px 16px}
  .side nav{flex-direction:row;overflow-x:auto}
  .side nav a{white-space:nowrap}
  .side .brand{margin-bottom:10px}
  main{padding:16px}
  .grid2{grid-template-columns:1fr}
}