/* ===== RM Practice Lab - corporate blue/white theme ===== */
:root{
  --blue-700:#0b3d91; --blue-600:#1453c4; --blue-500:#2967e0;
  --blue-400:#5b8af0; --blue-100:#e6effd; --blue-50:#f3f8ff;
  --ink:#13243f; --muted:#6b7a93; --line:#dbe4f2;
  --bg:#eef4fb; --card:#ffffff;
  --gold:#f4b400; --good:#1f9d55; --bad:#d9453c; --warn:#e08a00;
  --shadow:0 6px 20px rgba(20,83,196,.08);
}
*{box-sizing:border-box}
body{margin:0;font-family:Segoe UI,Roboto,system-ui,sans-serif;background:var(--bg);color:var(--ink);font-size:15px}
.banner{background:linear-gradient(120deg,var(--blue-700),var(--blue-600));color:#fff;display:flex;align-items:center;gap:14px;padding:10px 18px;position:sticky;top:0;z-index:50}
.brand{display:flex;align-items:center;gap:9px;cursor:pointer;font-weight:800;font-size:18px}
.brand-ico{font-size:22px}
.nav{display:flex;gap:6px;margin-left:14px;flex-wrap:wrap}
.nav a{color:#dce8ff;text-decoration:none;padding:8px 12px;border-radius:9px;font-size:14px;cursor:pointer}
.nav a:hover{background:rgba(255,255,255,.12)}
.nav a.active{background:#fff;color:var(--blue-700);font-weight:700}
.top-points{margin-left:auto;background:var(--gold);color:#3a2c00;font-weight:800;padding:7px 12px;border-radius:999px;font-size:14px}
main{padding:20px;max-width:1080px;margin:0 auto}
.foot{text-align:center;color:var(--muted);font-size:12px;padding:18px}
h1{font-size:24px;margin:6px 0 4px}
h3{margin:6px 0}
.muted{color:var(--muted);font-size:13px}
.pill{display:inline-block;background:var(--blue-100);color:var(--blue-700);font-size:11px;font-weight:700;padding:2px 8px;border-radius:999px;margin-left:6px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px;box-shadow:var(--shadow);margin:12px 0}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.btn{background:var(--blue-600);color:#fff;border:none;border-radius:10px;padding:11px 16px;font-size:14px;font-weight:700;cursor:pointer}
.btn:hover{background:var(--blue-500)}
.btn.gold{background:var(--gold);color:#3a2c00}
.btn.ghost{background:#fff;color:var(--blue-700);border:1px solid var(--blue-400)}
.btn.danger{background:var(--bad)}
.btn.big{font-size:16px;padding:14px 22px}
.btn:disabled{opacity:.5;cursor:not-allowed}
.fld{width:100%;border:1px solid var(--line);border-radius:9px;padding:10px;font-size:14px;margin:5px 0;font-family:inherit}
.fld:focus{outline:none;border-color:var(--blue-400);box-shadow:0 0 0 3px var(--blue-100)}
.lbl{display:block;font-size:12px;font-weight:700;color:var(--blue-700);margin-top:8px}
.mini{display:inline-block;padding:6px 10px;font-size:12px;margin:3px}

/* category grid */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:14px}
.cat{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px;cursor:pointer;box-shadow:var(--shadow);transition:.15s}
.cat:hover{transform:translateY(-3px);border-color:var(--blue-400)}
.cat .ico{font-size:32px}
.cat .t{font-weight:800;margin-top:6px;font-size:16px}
.cat .d{color:var(--muted);font-size:13px;margin-top:3px}

/* stages */
.stage{margin-top:6px}
.q-prompt{font-size:17px;font-weight:700;margin:10px 0}
.q-scenario{background:var(--blue-50);border-left:4px solid var(--blue-500);padding:12px;border-radius:8px;margin:8px 0}
.option{display:block;width:100%;text-align:left;background:#fff;border:1px solid var(--line);border-radius:10px;padding:12px;margin:7px 0;font-size:15px;cursor:pointer}
.option:hover{border-color:var(--blue-400)}
.option.selected{border-color:var(--blue-600);background:var(--blue-50)}
.option.correct{border-color:var(--good);background:#e8f7ee}
.option.wrong{border-color:var(--bad);background:#fdeceb}
.feedback{background:var(--blue-50);border:1px solid var(--blue-100);border-radius:10px;padding:12px;margin-top:10px}
.feedback.strong{border-color:var(--good);background:#e8f7ee}
.feedback.weak{border-color:var(--bad);background:#fdeceb}
.feedback.acceptable{border-color:var(--warn);background:#fff5e6}
.verdict{font-weight:800;margin-bottom:4px}
.fb-row{margin:3px 0;font-size:14px}
.best{margin-top:5px;color:var(--good);font-weight:600}

/* leaderboard */
.board{width:100%;border-collapse:collapse;margin-top:8px}
.board th,.board td{padding:9px 10px;text-align:left;border-bottom:1px solid var(--line);font-size:14px}
.board th{color:var(--muted);font-size:12px;text-transform:uppercase}
.board tr:nth-child(1) td{font-weight:800}
.rank1{color:var(--gold)}

/* live stage */
.live{background:linear-gradient(120deg,#0b3d91,#1453c4);color:#fff;border-radius:16px;padding:22px;margin-top:12px;box-shadow:var(--shadow)}
.live h2{margin:0 0 4px}
.live .step{font-size:13px;opacity:.85}
.live .big-q{font-size:22px;font-weight:800;margin:14px 0;background:rgba(255,255,255,.12);padding:14px;border-radius:12px}
.live .meta{display:flex;gap:18px;flex-wrap:wrap;font-size:14px;opacity:.95}
.stars{display:flex;gap:6px;margin:12px 0}
.star{font-size:34px;cursor:pointer;filter:grayscale(1) opacity(.5)}
.star.on{filter:none}
.trainee-pick{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0}
.tpick{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.3);color:#fff;border-radius:10px;padding:10px 14px;cursor:pointer;font-weight:700}
.tpick.sel{background:var(--gold);color:#3a2c00}
.timer{font-size:40px;font-weight:800;text-align:center;margin:6px 0}
.timer.warn{color:var(--gold)}

/* progress + stat */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:12px 0}
.stat{background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px;text-align:center}
.stat .big{font-size:26px;font-weight:800;color:var(--blue-700)}
.stat .lbl{font-size:12px;color:var(--muted)}
.bar{background:var(--line);border-radius:999px;height:10px;overflow:hidden}
.bar span{display:block;height:100%;background:var(--blue-500)}
.bar.small{height:7px}
.perf-row{margin:8px 0}
.perf-row .top{display:flex;justify-content:space-between;font-size:13px;font-weight:600}
.badges{display:flex;gap:10px;flex-wrap:wrap;margin-top:8px}
.badge{background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px;text-align:center;min-width:84px}
.badge .b-ico{font-size:26px}
.badge.locked{opacity:.4}
.note-box{background:var(--blue-50);border:1px solid var(--blue-100);border-radius:10px;padding:12px;margin:10px 0;font-size:13px}
.reco{background:#fff;border-left:4px solid var(--gold);border-radius:8px;padding:10px 12px;margin:8px 0;font-size:14px;box-shadow:var(--shadow)}
.act-list{display:grid;grid-template-columns:1fr;gap:10px;margin-top:10px}
.act{display:flex;align-items:center;gap:14px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px;cursor:pointer;box-shadow:var(--shadow)}
.act .ico{font-size:28px}
.act .meta{flex:1}
.act .t{font-weight:800}
.act .d{color:var(--muted);font-size:13px}

/* toast */
.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;padding:12px 18px;border-radius:10px;opacity:0;transition:.3s;z-index:99}
.toast.show{opacity:1}

/* responsive */
@media(max-width:880px){
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .cat-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:560px){
  .nav a{padding:7px 9px;font-size:13px}
  .cat-grid{grid-template-columns:1fr 1fr}
  .brand-name{display:none}
  .top-points{font-size:11px;padding:5px 8px}
}