/* WREXAEDGE AIBE — dark premium theme */
:root{
  --bg:#070b14; --panel:#0f1420; --panel2:#131a2a; --line:#1e2740;
  --txt:#e8ecf6; --muted:#95a2bd; --accent:#2563eb; --accent2:#3b82f6;
  --good:#34d399; --warn:#fbbf24; --bad:#f87171; --gold:#e0b23a;
  --radius:16px;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--txt);line-height:1.5;-webkit-font-smoothing:antialiased}
#app{min-height:100%}
a{color:inherit}
button{font-family:inherit;cursor:pointer}
input,select{font-family:inherit}
.muted{color:var(--muted)}
.link{color:var(--accent2);font-size:13px;font-weight:600;cursor:pointer;margin-left:auto}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid var(--line);background:var(--panel2);color:var(--txt);padding:10px 16px;border-radius:10px;font-size:14px;font-weight:600;transition:all .15s}
.btn:hover{border-color:var(--accent)}
.btn.primary{background:linear-gradient(135deg,var(--accent),var(--accent2));border-color:transparent;color:#fff}
.btn.primary:hover{filter:brightness(1.08)}
.btn.gold{background:var(--gold);border-color:transparent;color:#0d0f13;font-weight:700}
.btn.ghost{background:transparent}
.btn.danger{background:transparent;border-color:#5b2330;color:#fca5a5}
.btn.locked{background:#0b0f18;color:#c7cfe2;border-color:#2a3346}
.btn.sm{padding:7px 12px;font-size:13px}
.btn.full{width:100%}
.btn[disabled]{opacity:.4;pointer-events:none}

/* layout */
.layout{display:flex;min-height:100vh}
.sidebar{width:250px;flex-shrink:0;background:var(--panel);border-right:1px solid var(--line);display:flex;flex-direction:column;padding:18px 14px;gap:14px;position:sticky;top:0;height:100vh}
.sidebar.closed{display:none}
.sb-brand{display:flex;flex-direction:column;gap:6px;align-items:flex-start;padding:0 4px}
.sb-tag{font-size:10px;letter-spacing:2px;color:var(--muted);font-weight:700}
.sb-nav{display:flex;flex-direction:column;gap:4px;margin-top:6px}
.nav-item{display:flex;align-items:center;gap:12px;padding:11px 14px;border-radius:11px;background:transparent;border:none;color:var(--muted);font-size:14px;font-weight:600;text-align:left;width:100%;transition:all .15s}
.nav-item:hover{background:var(--panel2);color:var(--txt)}
.nav-item.active{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;box-shadow:0 8px 20px -8px rgba(109,94,252,.6)}
.nav-ico{width:20px;text-align:center}
.sb-pro{margin-top:auto;background:linear-gradient(135deg,#1a1440,#241a52);border:1px solid #362a6b;border-radius:14px;padding:16px;text-align:center}
.sb-pro-title{font-weight:800;font-size:14px}
.sb-pro-sub{font-size:11.5px;color:var(--muted);margin:4px 0 12px}
.main{flex:1;min-width:0;display:flex;flex-direction:column}

/* topbar */
.topbar{display:flex;align-items:center;gap:14px;padding:14px 26px;border-bottom:1px solid var(--line);background:rgba(15,20,32,.6);backdrop-filter:blur(8px);position:sticky;top:0;z-index:20}
.burger{background:var(--panel2);border:1px solid var(--line);color:var(--txt);width:38px;height:38px;border-radius:10px;font-size:16px}
.search{flex:1;max-width:520px;display:flex;align-items:center;gap:8px;background:var(--panel2);border:1px solid var(--line);border-radius:12px;padding:9px 14px}
.search input{flex:1;background:transparent;border:none;outline:none;color:var(--txt);font-size:14px}
.top-right{margin-left:auto;display:flex;align-items:center;gap:14px}
.streak-badge{background:#241a10;border:1px solid #4a3410;color:#f5b942;padding:7px 12px;border-radius:10px;font-size:13px;font-weight:700}
.profile{display:flex;align-items:center;gap:10px;background:transparent;border:none;color:var(--txt)}
.avatar{width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent2));display:grid;place-items:center;font-weight:800;color:#fff}
.p-name{font-size:13px;font-weight:700;text-align:left}
.p-role{font-size:11px;color:var(--muted);text-align:left}

/* content + views */
.content{padding:26px;max-width:1240px;width:100%;margin:0 auto}
.view-head h1{font-size:26px;font-weight:800;letter-spacing:-.3px}
.view-head p{color:var(--muted);margin-top:2px;margin-bottom:20px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:18px}
.grid-2{display:grid;grid-template-columns:1.3fr 1fr;gap:16px;margin-bottom:18px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:20px;margin-bottom:18px}
.card-title{display:flex;align-items:center;gap:8px;font-weight:800;font-size:16px;margin-bottom:14px}
.card.empty{color:var(--muted);text-align:center;padding:40px}

/* stat cards */
.stat-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.stat-card.v1{background:linear-gradient(135deg,#161a35,#0f1420)}
.stat-card.v2{background:linear-gradient(135deg,#0f2033,#0f1420)}
.stat-card.v3{background:linear-gradient(135deg,#0f2620,#0f1420)}
.stat-card.v4{background:linear-gradient(135deg,#231633,#0f1420)}
.sc-big{font-size:26px;font-weight:800;color:#fff}
.sc-label{font-size:12.5px;color:var(--muted);margin-top:4px}

/* subjects grid */
.subj-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:10px}
.subj-chip{display:flex;align-items:center;gap:8px;background:var(--panel2);border:1px solid var(--line);color:var(--txt);border-radius:11px;padding:11px 12px;font-size:13px;font-weight:600;text-align:left;transition:all .15s}
.subj-chip:hover{border-color:var(--accent);transform:translateY(-1px)}
.subj-ico{width:22px;height:22px;border-radius:7px;background:rgba(109,94,252,.18);color:var(--accent2);display:grid;place-items:center;font-weight:800;flex-shrink:0}
.mentor-stat{margin-top:14px;padding-top:14px;border-top:1px solid var(--line)}
.ms-big{font-size:24px;font-weight:800;color:var(--accent2)}

/* mock row (dashboard) */
.mock-row{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px}
.mock-mini{background:var(--panel2);border:1px solid var(--line);border-radius:12px;padding:14px}
.mm-name{font-weight:700;font-size:14px}
.mm-meta{font-size:12px;color:var(--muted);margin:3px 0 8px}
.mm-score{font-size:12px;margin-bottom:10px}

/* quick actions */
.qa-row{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.qa-row.wrap{grid-template-columns:repeat(auto-fill,minmax(160px,1fr))}
.qa-card{background:var(--panel2);border:1px solid var(--line);color:var(--txt);border-radius:12px;padding:16px;text-align:center;transition:all .15s}
.qa-card:hover{border-color:var(--accent);transform:translateY(-2px)}
.qa-ico{font-size:22px}
.qa-title{font-weight:700;font-size:13px;margin-top:6px}
.qa-sub{font-size:11px;color:var(--muted)}

/* pro banner */
.pro-banner{display:flex;flex-wrap:wrap;align-items:center;gap:12px;justify-content:space-between;background:linear-gradient(135deg,#161129,#0d0f13);border:1px solid var(--gold);border-radius:14px;padding:16px 18px;margin-bottom:18px}
.pb-title{font-weight:700;font-size:15px}
.pb-sub{font-size:12.5px;color:var(--muted);margin-top:2px}

/* mock tests grid */
.mt-grid,.subject-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px}
.mt-card,.sj-card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px;transition:all .15s}
.mt-card:hover,.sj-card:hover{border-color:var(--accent)}
.mt-top{display:flex;justify-content:space-between;align-items:center;font-size:11px;font-weight:700;color:var(--muted);letter-spacing:1px}
.mt-done{color:var(--good)}
.mt-new{color:var(--accent2)}
.mt-title{font-size:16px;font-weight:800;margin:8px 0 4px}
.mt-sub{font-size:12.5px;color:var(--muted);margin-bottom:14px}
.sj-ico{width:38px;height:38px;border-radius:11px;background:rgba(109,94,252,.18);color:var(--accent2);display:grid;place-items:center;font-weight:800;font-size:18px}
.sj-name{font-weight:700;font-size:14px;margin:10px 0 2px}
.sj-meta{font-size:12px;color:var(--muted);margin-bottom:12px}
.sz-row{display:flex;flex-wrap:wrap;gap:6px}

/* performance bars */
.bars{display:flex;flex-direction:column;gap:12px}
.bar-row{display:grid;grid-template-columns:130px 1fr 44px;align-items:center;gap:12px}
.bar-label{font-size:13px;font-weight:600}
.bar-track{height:9px;background:var(--panel2);border-radius:99px;overflow:hidden}
.bar-fill{height:100%;background:linear-gradient(90deg,var(--accent),var(--accent2));border-radius:99px}
.bar-pct{font-size:12px;color:var(--muted);text-align:right}

/* bookmarks + settings */
.bm-item{padding:12px 0;border-bottom:1px solid var(--line)}
.bm-q{font-size:14px;font-weight:600}
.bm-a{font-size:12.5px;color:var(--good);margin-top:4px}
.fld-label{display:block;font-size:12.5px;color:var(--muted);margin-bottom:6px}
.fld{width:100%;max-width:340px;padding:11px 12px;border-radius:10px;border:1px solid var(--line);background:var(--panel2);color:var(--txt);font-size:14px;outline:none}
.row-gap{display:flex;gap:10px;margin-top:16px;flex-wrap:wrap}

/* logo */
.logo-mark{width:38px;height:38px;display:grid;place-items:center}

/* ===== EXAM RUNNER ===== */
.exam-layout{max-width:1080px;margin:0 auto;padding:18px}
.exam-top{display:flex;align-items:center;justify-content:space-between;gap:12px;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:14px 18px;margin-bottom:16px;flex-wrap:wrap}
.exam-top .brand{display:flex;align-items:center;gap:14px}
.exam-exit{background:var(--panel2);border:1px solid var(--line);color:var(--txt);padding:8px 12px;border-radius:9px;font-weight:600}
.exam-name{font-weight:800;font-size:15px}
.exam-name-sub{font-size:12px;color:var(--muted)}
.timer{display:flex;flex-direction:column;align-items:center;background:#231a10;border:1px solid #4a3410;border-radius:11px;padding:6px 16px}
.timer-label{font-size:10px;color:#f5b942;letter-spacing:1px}
.timer-value{font-size:20px;font-weight:800;color:#f5b942}
.exam-body{display:grid;grid-template-columns:1fr 260px;gap:16px;align-items:start}
.exam-main{min-width:0}
.question-card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:22px}
.q-head{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.q-num{font-size:12.5px;color:var(--muted);font-weight:700}
.q-marked-tag{font-size:11px;color:var(--warn)}
.q-text{font-size:16.5px;font-weight:600;line-height:1.6;margin-bottom:18px}
.options{display:flex;flex-direction:column;gap:10px}
.option{display:flex;align-items:center;gap:12px;background:var(--panel2);border:1px solid var(--line);border-radius:11px;padding:13px 15px;cursor:pointer;transition:all .12s}
.option:hover{border-color:var(--accent)}
.option.selected{border-color:var(--accent);background:rgba(109,94,252,.12)}
.option input{accent-color:var(--accent);width:16px;height:16px}
.opt-letter{width:26px;height:26px;border-radius:7px;background:var(--panel);display:grid;place-items:center;font-weight:800;font-size:13px;flex-shrink:0}
.opt-text{font-size:14.5px}
.q-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.palette{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px;position:sticky;top:16px}
.palette-title{font-size:13px;font-weight:800;margin-bottom:12px}
.palette-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}
.palette-cell{aspect-ratio:1;border-radius:8px;background:var(--panel2);border:1px solid var(--line);color:var(--txt);font-size:12px;font-weight:700}
.palette-cell.answered{background:var(--good);color:#04240f;border-color:transparent}
.palette-cell.marked{background:var(--warn);color:#3a2a00;border-color:transparent}
.palette-cell.current{outline:2px solid var(--accent);outline-offset:1px}
.palette-summary{margin-top:12px}
.legend{display:flex;flex-direction:column;gap:6px;margin-top:12px;font-size:12px;color:var(--muted)}
.legend-item{display:flex;align-items:center;gap:8px}
.legend-swatch{width:14px;height:14px;border-radius:4px;display:inline-block}
.lang-toggle{display:flex;gap:4px}
.lang-btn{background:var(--panel2);border:1px solid var(--line);color:var(--muted);padding:6px 10px;border-radius:8px;font-size:12px;font-weight:700}
.lang-btn.active{background:var(--accent);color:#fff;border-color:transparent}

/* result screen */
.result{max-width:820px;margin:0 auto;padding:24px}
.result-inner{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:28px}
.score-card{text-align:center;padding:20px;background:linear-gradient(135deg,#161a35,#0f1420);border-radius:14px;margin-bottom:20px}
.score-big{font-size:46px;font-weight:900;color:#fff}
.score-label{color:var(--muted);font-size:13px}
.score-stats,.stat-box{display:flex}
.score-stats{gap:12px;justify-content:center;flex-wrap:wrap;margin-top:14px}
.stat-box{flex-direction:column;align-items:center;background:var(--panel2);border:1px solid var(--line);border-radius:11px;padding:12px 18px;min-width:92px}
.stat-val{font-size:20px;font-weight:800}
.stat-key{font-size:11px;color:var(--muted)}
.section-scores{margin-top:18px}
.sec-row{display:grid;grid-template-columns:150px 1fr 60px;align-items:center;gap:10px;margin-bottom:8px}
.sec-name{font-size:13px}
.sec-bar{height:8px;background:var(--panel2);border-radius:99px;overflow:hidden}
.sec-fill{height:100%;background:linear-gradient(90deg,var(--accent),var(--accent2))}
.sec-val{font-size:12px;color:var(--muted);text-align:right}
.result-actions{display:flex;gap:10px;justify-content:center;margin-top:22px;flex-wrap:wrap}
.review-head-bar{display:flex;align-items:center;justify-content:space-between;margin:24px 0 12px;flex-wrap:wrap;gap:10px}
.review-heading{font-weight:800;font-size:17px}
.review-filter{display:flex;gap:6px}
.rf-btn{background:var(--panel2);border:1px solid var(--line);color:var(--muted);padding:6px 12px;border-radius:8px;font-size:12px;font-weight:700}
.rf-btn.active{background:var(--accent);color:#fff;border-color:transparent}
.review-list{display:flex;flex-direction:column;gap:12px}
.review-item{background:var(--panel2);border:1px solid var(--line);border-radius:12px;padding:16px}
.review-index{font-size:12px;color:var(--muted);font-weight:700}
.review-q{font-weight:600;margin:6px 0 10px}
.review-ans{display:flex;align-items:center;gap:8px;font-size:13.5px;padding:8px 12px;border-radius:8px;margin-bottom:6px;background:var(--panel)}
.review-ans.correct{background:rgba(52,211,153,.12);color:#8ef0c4}
.review-ans.bk-btn{cursor:pointer}
.ans-line{font-size:13px}
.ans-exp{font-size:13px;color:var(--muted);margin-top:8px;padding-top:8px;border-top:1px solid var(--line)}

@media(max-width:900px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-2{grid-template-columns:1fr}
  .qa-row{grid-template-columns:repeat(2,1fr)}
  .exam-body{grid-template-columns:1fr}
  .palette{position:static}
  .sidebar{position:fixed;z-index:50;box-shadow:0 0 40px rgba(0,0,0,.6)}
}
@media(max-width:560px){
  .grid-4{grid-template-columns:1fr}
  .content{padding:16px}
  .p-name,.p-role{display:none}
}

/* revision zone */
.rev-card .rev-q{font-weight:600;font-size:14.5px;margin-bottom:8px}
.rev-your{font-size:13px;color:#fca5a5}
.rev-correct{font-size:13px;color:var(--good);margin-top:2px}
.rev-exp{font-size:12.5px;color:var(--muted);margin-top:8px;padding-top:8px;border-top:1px solid var(--line)}
/* leaderboard */
.lb-me{background:var(--panel2);border:1px solid var(--line);border-radius:11px;padding:12px 14px;font-weight:700;margin-bottom:14px}
.lb-list{display:flex;flex-direction:column;gap:6px}
.lb-row{display:flex;align-items:center;gap:12px;padding:11px 14px;background:var(--panel2);border:1px solid var(--line);border-radius:10px}
.lb-row.top{border-color:var(--accent)}
.lb-pos{font-weight:800;color:var(--muted);width:44px}
.lb-name{flex:1;font-weight:600}
.lb-score{font-weight:800;color:var(--accent2)}