*{box-sizing:border-box}
:root{--blue:#2f5fa8;--blue-d:#1f4380;--bg:#eef2f8;--line:#d5dbe7;--txt:#1e2430;--muted:#6b7280;--ok:#1f7a3a;--warn:#9a6700;--err:#b42318;--head:#4a8ad8}
html,body{margin:0;padding:0;font-family:"Segoe UI",Tahoma,Arial,sans-serif;font-size:13px;color:var(--txt);background:var(--bg)}
a{color:var(--blue)}
.app{min-height:100vh;display:flex;flex-direction:column}
.topbar{background:linear-gradient(90deg,var(--blue-d),var(--blue));color:#fff;display:flex;justify-content:space-between;align-items:center;padding:8px 16px}
.topbar .brand{display:flex;align-items:center;gap:8px;font-size:16px;font-weight:600}
.topbar .brand img{height:24px}
.topbar .user a{color:#fff;margin-left:14px}
.body{display:flex;flex:1}
.sidebar{width:230px;background:#fff;border-right:1px solid var(--line);padding:10px 0}
.navhead{padding:10px 14px 4px;font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);font-weight:700}
.navitem{display:block;padding:6px 14px 6px 22px;color:var(--txt);text-decoration:none;border-left:3px solid transparent}
.navitem:hover{background:#f1f5fb}
.navitem.active{border-left-color:var(--blue);background:#e8effa;font-weight:600}
.navitem.muted{color:#9aa3b2}
.content{flex:1;padding:14px 20px;min-width:0}
.pagehead{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.pagehead h1{font-size:18px;margin:0;color:var(--blue-d)}
.help{display:inline-block;width:18px;height:18px;border-radius:50%;background:var(--blue);color:#fff;text-align:center;line-height:18px;font-size:12px;cursor:help}
.footer{background:#fff;border-top:1px solid var(--line);padding:6px 16px;font-size:11px;color:var(--muted)}
.card{background:#fff;border:1px solid var(--line);border-radius:6px;padding:12px 14px;margin-bottom:12px}
.card h2,.card h3{margin:0 0 10px;font-size:14px;color:var(--blue-d)}
.msg{padding:8px 12px;border-radius:4px;margin-bottom:10px;border:1px solid}
.msg.ok{background:#e9f7ee;border-color:#9fd6b2;color:var(--ok)}
.msg.warn{background:#fff7e0;border-color:#f1d27a;color:var(--warn)}
.msg.err{background:#fdecea;border-color:#f3b0a8;color:var(--err)}
.msg.info{background:#e8effa;border-color:#b9cbea;color:var(--blue-d)}
.grid{width:100%;border-collapse:collapse;background:#fff}
.grid th{background:var(--head);color:#fff;text-align:left;padding:6px 8px;font-weight:600;font-size:12px}
.grid td{padding:5px 8px;border-bottom:1px solid var(--line);vertical-align:top}
.grid tr:nth-child(even) td{background:#f7f9fd}
.grid tr:hover td{background:#eef4fd}
.grid.compact td,.grid.compact th{padding:3px 6px}
.filters{display:flex;flex-wrap:wrap;gap:10px 16px;align-items:flex-end}
.field{display:flex;flex-direction:column;gap:3px;min-width:120px}
.field label,.lbl{font-size:11px;color:var(--muted);font-weight:600}
input[type=text],input[type=number],input[type=password],input[type=date],input[type=time],select,textarea{border:1px solid #b9c2d3;border-radius:4px;padding:5px 7px;font:inherit;background:#fff}
input[type=text]:focus,select:focus,textarea:focus{outline:2px solid #b9cbea}
textarea{width:100%;min-height:70px}
.btn{display:inline-block;background:var(--blue);color:#fff;border:0;border-radius:4px;padding:6px 12px;font:inherit;cursor:pointer;text-decoration:none;line-height:1.2}
.btn:hover{background:var(--blue-d)}
.btn.secondary{background:#fff;color:var(--blue);border:1px solid var(--blue)}
.btn.danger{background:var(--err)}
.btn.small{padding:3px 8px;font-size:12px}
.btn:disabled{opacity:.5;cursor:not-allowed}
.inline{display:inline}
.right{text-align:right}
.center{text-align:center}
.nowrap{white-space:nowrap}
.muted{color:var(--muted)}
.pill{display:inline-block;padding:1px 7px;border-radius:10px;font-size:11px;background:#e8effa;color:var(--blue-d)}
.pill.ok{background:#e9f7ee;color:var(--ok)}
.pill.warn{background:#fff7e0;color:var(--warn)}
.pill.err{background:#fdecea;color:var(--err)}
.q-row{border:1px solid var(--line);border-radius:6px;background:#fff;margin-bottom:8px}
.q-head{display:flex;gap:10px;align-items:flex-start;padding:8px 10px;background:#f3f7fd;border-bottom:1px solid var(--line);cursor:pointer}
.q-head .no{font-weight:700;min-width:60px}
.q-text{flex:1}
.q-text img{max-width:100%}
.q-body{padding:8px 12px;display:none}
.q-row.open .q-body{display:block}
.ans{padding:3px 6px;margin:2px 0;border-radius:3px}
.ans.correct{background:#dff5e4;font-weight:600}
.ans .letter{display:inline-block;width:20px;font-weight:700}
.meta{font-size:11px;color:var(--muted)}
.toolbar{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:8px 0}
.split{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media(max-width:900px){.split{grid-template-columns:1fr}.sidebar{display:none}}
.stat{display:inline-block;background:#fff;border:1px solid var(--line);border-radius:6px;padding:10px 16px;margin:0 10px 10px 0;min-width:140px}
.stat b{display:block;font-size:22px;color:var(--blue-d)}
.stat span{font-size:11px;color:var(--muted);text-transform:uppercase}
.editor{width:100%;min-height:120px;border:1px solid #b9c2d3;border-radius:4px;padding:6px;background:#fff;overflow:auto}
.editor:focus{outline:2px solid #b9cbea}
.ed-toolbar{margin-bottom:4px}
.ed-toolbar button{font:inherit;padding:2px 7px;margin-right:2px;border:1px solid #b9c2d3;background:#f7f9fd;border-radius:3px;cursor:pointer}
.opt-row{display:flex;gap:8px;align-items:flex-start;margin:6px 0}
.opt-row .letter{width:26px;font-weight:700;padding-top:6px}
.opt-row .editor{min-height:50px}
.tree ul{list-style:none;padding-left:18px;margin:2px 0}
.tree li{padding:1px 0}
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#1f4380,#7f99d1)}
.login{background:#fff;border-radius:8px;padding:26px 30px;width:380px;box-shadow:0 10px 30px rgba(0,0,0,.25)}
.login h1{margin:0 0 4px;font-size:18px;color:var(--blue-d)}
.login .field{margin-bottom:12px}
.login input{width:100%}
pre.sql{background:#f5f7fb;border:1px solid var(--line);padding:8px;font-size:11px;max-height:320px;overflow:auto}
/* candidate exam */
body.candidate{background:#dfe6f2}
.cand-wrap{max-width:1200px;margin:0 auto;padding:10px}
.cand-footer{font-size:11px;color:var(--muted);text-align:center;padding:10px}
.cand-head{background:#000;color:orange;font-size:20px;font-weight:700;padding:8px 12px;border-radius:6px 6px 0 0;display:flex;justify-content:space-between;align-items:center}
.cand-head .timer{font-size:22px;color:#fff;background:#333;padding:2px 10px;border-radius:4px}
.exam{display:grid;grid-template-columns:1fr 250px;gap:10px}
.qpad{display:flex;flex-wrap:wrap;gap:4px}
.qpad button{width:34px;height:28px;border:1px solid #888;border-radius:3px;cursor:pointer;font-size:11px;background:#cfe0ff}
.qpad button.answered{background:#8fdc9a}
.qpad button.review{background:#f19c9c}
.qpad button.current{outline:3px solid #000}
.legend span{display:inline-block;width:14px;height:14px;border:1px solid #888;vertical-align:middle;margin-right:4px}
.question-panel{background:#fff;border:1px solid var(--line);border-radius:6px;padding:14px;min-height:420px}
.question-panel .qtext{font-size:16px;line-height:1.6;margin:8px 0 14px}
.question-panel .option{display:flex;gap:10px;align-items:flex-start;padding:8px;border:1px solid var(--line);border-radius:4px;margin-bottom:6px;font-size:15px;cursor:pointer}
.question-panel .option:hover{background:#f3f7fd}
.instructions{background:#fff;border:1px solid var(--line);padding:12px 16px;border-radius:6px;font-size:14px;line-height:1.6}
.result-table td,.result-table th{border:1px solid #333;padding:4px 8px;text-align:center}
@media print{.sidebar,.topbar,.footer,.toolbar,.noprint{display:none!important}.content{padding:0}.card{border:0}}