@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;600;700;800&family=DM+Sans:ital,wght@0,300;0,400;0,500;0,600;1,400&display=swap');
:root{
--bg:#0b0d12;--bg2:#13151e;--bg3:#1a1d28;--card:#161923;
--border:#252836;--accent:#7c6af7;--a2:#f06292;--a3:#26d4a8;
--text:#e8eaf0;--muted:#6b7280;--sub:#9ca3af;
--danger:#ef4444;--warn:#f59e0b;--success:#22c55e;
--r:14px;--sh:0 4px 24px rgba(0,0,0,.45);
--font:'DM Sans',sans-serif;--head:'Syne',sans-serif;
}
[data-theme=light]{
--bg:#f1f3f9;--bg2:#e8eaf2;--bg3:#fff;--card:#fff;
--border:#dde1ee;--text:#1a1d28;--muted:#6b7280;--sub:#9ca3af;--sh:0 2px 16px rgba(0,0,0,.08);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{overflow-x:hidden;-webkit-overflow-scrolling:touch}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh;font-size:15px;line-height:1.6;overflow-x:hidden}
button{color:inherit;font-family:var(--font)}
::-webkit-scrollbar{width:5px;height:5px}
::-webkit-scrollbar-track{background:var(--bg2)}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}

/* ── Layout ───────────────────────────────────────────────── */
.wrap{display:flex;min-height:100vh}
.sidebar{width:240px;background:var(--bg2);border-right:1px solid var(--border);display:flex;flex-direction:column;position:fixed;top:0;left:0;height:100vh;z-index:200;transition:transform .3s ease}
.main{margin-left:240px;flex:1;display:flex;flex-direction:column;min-height:100vh}
.topbar{background:var(--bg2);border-bottom:1px solid var(--border);padding:0 20px;height:52px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:100}
.content{padding:24px;flex:1}

/* ── Sidebar ──────────────────────────────────────────────── */
.logo{padding:18px 16px 12px;display:flex;align-items:center;gap:10px;border-bottom:1px solid var(--border)}
.logo-icon{width:34px;height:34px;background:linear-gradient(135deg,var(--accent),var(--a2));border-radius:9px;display:flex;align-items:center;justify-content:center;font-size:17px;flex-shrink:0}
.logo-text{font-family:var(--head);font-weight:800;font-size:14px;line-height:1.2}
.logo-sub{font-size:10px;color:var(--muted)}
nav{padding:10px 8px;flex:1;overflow-y:auto}
.nav-sec{font-size:10px;font-weight:700;letter-spacing:.1em;color:var(--muted);padding:10px 10px 3px;text-transform:uppercase}
nav a{display:flex;align-items:center;gap:9px;padding:9px 10px;border-radius:9px;color:var(--muted);text-decoration:none;font-size:13.5px;font-weight:500;transition:all .18s;margin-bottom:1px}
nav a:hover{background:var(--bg3);color:var(--text)}
nav a.active{background:linear-gradient(135deg,rgba(124,106,247,.18),rgba(240,98,146,.08));color:var(--accent);border:1px solid rgba(124,106,247,.25)}
nav a i{width:16px;text-align:center;font-size:14px}
.sidebar-foot{padding:10px 8px;border-top:1px solid var(--border)}
.upill{display:flex;align-items:center;gap:8px;padding:8px 10px;border-radius:9px;background:var(--bg3)}
.upill img,.av{width:30px;height:30px;border-radius:50%;object-fit:cover;flex-shrink:0}
.av{background:linear-gradient(135deg,var(--accent),var(--a2));display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;color:#fff}
.uname{font-size:13px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.urole{font-size:11px;color:var(--muted)}

/* ── Topbar ───────────────────────────────────────────────── */
.page-title{font-family:var(--head);font-weight:700;font-size:15px}
.burger{display:none;background:none;border:none;color:var(--text);font-size:19px;cursor:pointer;padding:6px}
.overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:190}

/* ── Cards ────────────────────────────────────────────────── */
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:20px;box-shadow:var(--sh)}
.stats-row{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px;margin-bottom:22px}
.stat-card{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:16px;display:flex;align-items:flex-start;gap:12px;box-shadow:var(--sh)}
.stat-icon{width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0}
.stat-val{font-family:var(--head);font-size:24px;font-weight:800;line-height:1}
.stat-lbl{font-size:11px;color:var(--muted);margin-top:2px}

/* ── Quiz Cards ───────────────────────────────────────────── */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:16px}
.qcard{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:16px;display:flex;flex-direction:column;gap:10px;box-shadow:var(--sh);transition:transform .2s,box-shadow .2s;position:relative;overflow:hidden}
.qcard::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent),var(--a2))}
.qcard:hover{transform:translateY(-2px);box-shadow:0 8px 32px rgba(0,0,0,.5)}
.qcard-head{display:flex;align-items:flex-start;justify-content:space-between;gap:6px}
.qname{font-family:var(--head);font-weight:700;font-size:14px;line-height:1.3}
.tags{display:flex;flex-wrap:wrap;gap:5px}
.tag{background:var(--bg3);border:1px solid var(--border);padding:2px 8px;border-radius:20px;color:var(--muted);font-size:11px;display:inline-flex;align-items:center;gap:3px}
.tag.free{color:var(--success);border-color:rgba(34,197,94,.3);background:rgba(34,197,94,.06)}
.tag.premium{color:var(--warn);border-color:rgba(245,158,11,.3);background:rgba(245,158,11,.06)}
.qcard-acts{display:flex;gap:5px;margin-top:auto}
.ts{font-size:10px;color:var(--muted)}

/* ── Buttons ──────────────────────────────────────────────── */
.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:9px;font-size:13.5px;font-weight:600;cursor:pointer;border:none;text-decoration:none;transition:all .18s;font-family:var(--font);white-space:nowrap}
.btn-sm{padding:5px 12px;font-size:12.5px;border-radius:7px}
.btn-xs{padding:3px 9px;font-size:11.5px;border-radius:6px}
.btn-primary{background:linear-gradient(135deg,var(--accent),#8b5cf6);color:#fff;box-shadow:0 3px 12px rgba(124,106,247,.3)}
.btn-primary:hover{box-shadow:0 5px 18px rgba(124,106,247,.5);transform:translateY(-1px)}
.btn-ghost{background:var(--bg3);border:1px solid var(--border);color:var(--text)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn-danger{background:rgba(239,68,68,.1);border:1px solid rgba(239,68,68,.3);color:var(--danger)}
.btn-danger:hover{background:var(--danger);color:#fff}
.btn-success{background:rgba(34,197,94,.1);border:1px solid rgba(34,197,94,.3);color:var(--success)}
.btn-success:hover{background:var(--success);color:#000}
.btn-block{width:100%;justify-content:center}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important;box-shadow:none!important}

/* ── Forms ────────────────────────────────────────────────── */
.fg{margin-bottom:16px}
label{display:block;font-size:12px;font-weight:700;color:var(--muted);margin-bottom:5px;text-transform:uppercase;letter-spacing:.04em}
input,textarea,select{width:100%;background:var(--bg3);border:1px solid var(--border);border-radius:9px;padding:9px 13px;color:var(--text);font-family:var(--font);font-size:14px;outline:none;transition:border .18s}
input:focus,textarea:focus,select:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(124,106,247,.12)}
textarea{resize:vertical;min-height:100px}
select option{background:var(--bg2)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.hint{font-size:11px;color:var(--muted);margin-top:4px}

/* ── Modal ────────────────────────────────────────────────── */
.mbg{position:fixed;inset:0;background:rgba(0,0,0,.7);z-index:1000;display:flex;align-items:center;justify-content:center;padding:16px;backdrop-filter:blur(4px);opacity:0;pointer-events:none;transition:opacity .2s}
.mbg.open{opacity:1;pointer-events:all}
.modal{background:var(--card);border:1px solid var(--border);border-radius:16px;width:100%;max-width:640px;max-height:92vh;overflow-y:auto;box-shadow:0 24px 64px rgba(0,0,0,.6);transform:translateY(16px);transition:transform .25s}
.mbg.open .modal{transform:translateY(0)}
.mhead{padding:18px 22px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}
.mtitle{font-family:var(--head);font-size:16px;font-weight:700}
.mbody{padding:22px}
.mfoot{padding:14px 22px;border-top:1px solid var(--border);display:flex;gap:8px;justify-content:flex-end}
.xbtn{background:none;border:none;color:var(--muted);cursor:pointer;font-size:20px;line-height:1;transition:color .18s}
.xbtn:hover{color:var(--text)}

/* ── Tabs ─────────────────────────────────────────────────── */
.tabs{display:flex;gap:3px;background:var(--bg3);padding:3px;border-radius:10px;margin-bottom:18px;border:1px solid var(--border)}
.tab{flex:1;padding:7px;border-radius:8px;border:none;background:none;color:var(--muted);font-size:12.5px;font-weight:600;cursor:pointer;transition:all .18s;font-family:var(--font);text-align:center}
.tab.active{background:var(--card);color:var(--text);box-shadow:0 1px 6px rgba(0,0,0,.2)}

/* ── Alert ────────────────────────────────────────────────── */
.alert{padding:10px 14px;border-radius:9px;font-size:13px;display:flex;align-items:flex-start;gap:8px;margin-bottom:14px}
.alert-err{background:rgba(239,68,68,.1);border:1px solid rgba(239,68,68,.3);color:#f87171}
.alert-ok{background:rgba(34,197,94,.1);border:1px solid rgba(34,197,94,.3);color:var(--success)}
.alert-info{background:rgba(124,106,247,.1);border:1px solid rgba(124,106,247,.3);color:#a78bfa}

/* ── Toast ────────────────────────────────────────────────── */
#toast-wrap{position:fixed;bottom:18px;right:18px;z-index:9999;display:flex;flex-direction:column;gap:6px;pointer-events:none}
.toast{background:var(--card);border:1px solid var(--border);padding:10px 14px;border-radius:10px;font-size:13px;box-shadow:var(--sh);transform:translateX(110px);opacity:0;transition:all .25s;pointer-events:all;display:flex;align-items:center;gap:8px;min-width:200px}
.toast.show{transform:translateX(0);opacity:1}
.toast.ok{border-color:rgba(34,197,94,.3)}
.toast.err{border-color:rgba(239,68,68,.3)}
.toast.info{border-color:rgba(124,106,247,.3)}

/* ── Spinner ──────────────────────────────────────────────── */
.spin{width:18px;height:18px;border:2px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:rot .6s linear infinite;display:inline-block;flex-shrink:0}
@keyframes rot{to{transform:rotate(360deg)}}
.loading{display:flex;align-items:center;justify-content:center;padding:40px;gap:10px;color:var(--muted);font-size:14px}

/* ── Pagination ───────────────────────────────────────────── */
.pages{display:flex;gap:4px;align-items:center;justify-content:center;margin-top:20px;flex-wrap:wrap}
.pg{width:32px;height:32px;border-radius:7px;display:flex;align-items:center;justify-content:center;background:var(--card);border:1px solid var(--border);color:var(--text);cursor:pointer;font-size:13px;font-weight:600;text-decoration:none;transition:all .18s;user-select:none}
.pg:hover,.pg.on{background:var(--accent);border-color:var(--accent);color:#fff}
.pg.off{opacity:.35;pointer-events:none}

/* ── Question items ───────────────────────────────────────── */
.qi{background:var(--bg3);border:1px solid var(--border);border-radius:11px;padding:14px;margin-bottom:10px;position:relative}
.qi-num{font-size:10px;font-weight:700;color:var(--muted);margin-bottom:6px;text-transform:uppercase;letter-spacing:.05em}
.qi-q{font-size:13.5px;font-weight:500;margin-bottom:10px;white-space:pre-wrap}
.qi-img{width:100%;max-height:200px;object-fit:contain;border-radius:8px;margin-bottom:10px;border:1px solid var(--border)}
.opts-g{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.opt{padding:7px 10px;border-radius:7px;font-size:12.5px;border:1px solid var(--border);background:var(--bg2);display:flex;align-items:center;gap:7px;cursor:default}
.opt.correct{border-color:rgba(34,197,94,.4);background:rgba(34,197,94,.07);color:var(--success)}
.opt.wrong{border-color:rgba(239,68,68,.4);background:rgba(239,68,68,.07);color:var(--danger)}
.opt.selected{border-color:rgba(124,106,247,.4);background:rgba(124,106,247,.07)}
.opt-l{width:20px;height:20px;border-radius:5px;background:var(--border);display:flex;align-items:center;justify-content:center;font-size:10px;font-weight:700;flex-shrink:0}
.opt.correct .opt-l{background:var(--success);color:#000}
.opt.wrong .opt-l{background:var(--danger);color:#fff}
.exp{font-size:12px;color:var(--sub);margin-top:8px;padding-top:8px;border-top:1px solid var(--border);font-style:italic}
.qi-del,.qi-edit{position:absolute;top:10px;background:none;border:none;color:var(--muted);cursor:pointer;font-size:13px;transition:color .18s;padding:2px}
.qi-del{right:10px}.qi-edit{right:32px}
.qi-del:hover{color:var(--danger)}.qi-edit:hover{color:var(--accent)}

/* ── Quiz play / attempt ──────────────────────────────────── */
.play-wrap{max-width:700px;margin:0 auto}
.play-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;flex-wrap:wrap;gap:10px}
.timer-badge{background:var(--bg3);border:1px solid var(--border);border-radius:8px;padding:6px 14px;font-family:var(--head);font-size:18px;font-weight:700;min-width:72px;text-align:center}
.timer-badge.warn{color:var(--warn);border-color:rgba(245,158,11,.4)}
.timer-badge.danger{color:var(--danger);border-color:rgba(239,68,68,.4)}
.progress{height:5px;background:var(--bg3);border-radius:3px;overflow:hidden;margin-bottom:20px}
.progress-bar{height:100%;background:linear-gradient(90deg,var(--accent),var(--a2));border-radius:3px;transition:width .4s}
.play-opt{padding:12px 16px;border-radius:10px;font-size:14px;border:1.5px solid var(--border);background:var(--bg3);color:var(--text);display:flex;align-items:center;gap:10px;cursor:pointer;transition:all .18s;margin-bottom:8px;width:100%;text-align:left;font-family:var(--font)}
.play-opt:hover{border-color:var(--accent);background:rgba(124,106,247,.06)}
.play-opt.selected{border-color:var(--accent);background:rgba(124,106,247,.1)}
.play-opt.correct{border-color:var(--success);background:rgba(34,197,94,.08);color:var(--success)}
.play-opt.wrong{border-color:var(--danger);background:rgba(239,68,68,.08);color:var(--danger)}
.play-opt.disabled{pointer-events:none}

/* ── Leaderboard ──────────────────────────────────────────── */
.lb-row{display:flex;align-items:center;gap:12px;padding:12px 16px;border-bottom:1px solid var(--border);transition:background .18s}
.lb-row:hover{background:var(--bg3)}
.lb-rank{font-family:var(--head);font-size:16px;font-weight:800;width:28px;text-align:center;flex-shrink:0}
.lb-rank.gold{color:#fbbf24}
.lb-rank.silver{color:#9ca3af}
.lb-rank.bronze{color:#d97706}
.lb-name{flex:1;font-weight:500}
.lb-score{font-family:var(--head);font-weight:700;font-size:15px}
.lb-time{font-size:12px;color:var(--muted)}

/* ── Share card ───────────────────────────────────────────── */
.share-card{background:linear-gradient(135deg,rgba(124,106,247,.12),rgba(240,98,146,.08));border:1px solid rgba(124,106,247,.25);border-radius:var(--r);padding:16px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px}

/* ── Breadcrumb ───────────────────────────────────────────── */
.bc{display:flex;align-items:center;gap:6px;font-size:12.5px;color:var(--muted);margin-bottom:18px}
.bc a{color:var(--muted);text-decoration:none}.bc a:hover{color:var(--accent)}
.bc span{color:var(--text);font-weight:500}

/* ── Dropdown ─────────────────────────────────────────────── */
.dd{position:relative;display:inline-block}
.dd-menu{position:absolute;top:calc(100% + 5px);right:0;background:var(--card);border:1px solid var(--border);border-radius:10px;min-width:150px;z-index:300;box-shadow:0 8px 28px rgba(0,0,0,.4);overflow:hidden;opacity:0;pointer-events:none;transform:translateY(-6px);transition:all .18s}
.dd.open .dd-menu{opacity:1;pointer-events:all;transform:translateY(0)}
.ddi{padding:9px 13px;font-size:13px;cursor:pointer;display:flex;align-items:center;gap:8px;color:var(--text);text-decoration:none;transition:background .15s}
.ddi:hover{background:var(--bg3)}
.ddi.danger{color:var(--danger)}
.dd-sep{height:1px;background:var(--border);margin:3px 0}

/* ── Table ────────────────────────────────────────────────── */
.tbl-wrap{overflow-x:auto;border-radius:var(--r);border:1px solid var(--border)}
table{width:100%;border-collapse:collapse;font-size:13.5px}
th{background:var(--bg3);padding:10px 14px;text-align:left;font-size:11px;font-weight:700;letter-spacing:.05em;color:var(--muted);text-transform:uppercase;border-bottom:1px solid var(--border)}
td{padding:11px 14px;border-bottom:1px solid var(--border)}
tr:last-child td{border-bottom:none}
tbody tr:hover{background:rgba(255,255,255,.02)}

/* ── Empty ────────────────────────────────────────────────── */
.empty{text-align:center;padding:50px 20px;color:var(--muted)}
.empty i{font-size:44px;margin-bottom:14px;opacity:.25;display:block}
.empty h3{font-family:var(--head);font-size:17px;color:var(--text);margin-bottom:6px}

/* ── Login ────────────────────────────────────────────────── */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg);position:relative;overflow:hidden;padding:16px}
.login-wrap::before{content:'';position:absolute;width:500px;height:500px;border-radius:50%;background:radial-gradient(circle,rgba(124,106,247,.12),transparent 70%);top:-150px;right:-150px}
.login-wrap::after{content:'';position:absolute;width:350px;height:350px;border-radius:50%;background:radial-gradient(circle,rgba(240,98,146,.08),transparent 70%);bottom:-80px;left:-80px}
.login-box{background:var(--card);border:1px solid var(--border);border-radius:22px;padding:38px 32px;width:100%;max-width:400px;text-align:center;position:relative;z-index:1;box-shadow:0 24px 56px rgba(0,0,0,.5)}
.login-logo{width:60px;height:60px;background:linear-gradient(135deg,var(--accent),var(--a2));border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:26px;margin:0 auto 18px}
.login-title{font-family:var(--head);font-size:22px;font-weight:800;margin-bottom:6px}
.login-sub{color:var(--muted);font-size:13.5px;margin-bottom:24px;line-height:1.5}

/* ── Theme btn ────────────────────────────────────────────── */
.tbtn{background:var(--bg3);border:1px solid var(--border);border-radius:7px;width:32px;height:32px;display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--muted);font-size:14px;transition:all .18s}
.tbtn:hover{color:var(--text);border-color:var(--accent)}

/* ── Search bar ───────────────────────────────────────────── */
.search{display:flex;align-items:center;gap:8px;background:var(--bg3);border:1px solid var(--border);border-radius:9px;padding:0 12px;height:36px}
.search input{background:none;border:none;outline:none;color:var(--text);font-size:13.5px;flex:1;min-width:0}

/* ── Section header ───────────────────────────────────────── */
.sh{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;flex-wrap:wrap;gap:8px}
.sh-title{font-family:var(--head);font-size:16px;font-weight:700}

/* ── Editor grid ──────────────────────────────────────────── */
.egrid{display:grid;grid-template-columns:1fr 290px;gap:18px;align-items:start}
.esticky{position:sticky;top:76px}

/* ── Attempt result ───────────────────────────────────────── */
.result-circle{width:120px;height:120px;border-radius:50%;background:conic-gradient(var(--accent) var(--pct),var(--bg3) 0);display:flex;align-items:center;justify-content:center;margin:0 auto 16px;position:relative}
.result-circle::before{content:'';position:absolute;width:90px;height:90px;border-radius:50%;background:var(--card)}
.result-pct{position:relative;z-index:1;font-family:var(--head);font-size:22px;font-weight:800}

/* ── Responsive ───────────────────────────────────────────── */
@media(max-width:900px){.egrid{grid-template-columns:1fr!important}}
@media(max-width:768px){
  .sidebar{transform:translateX(-100%)}
  .sidebar.open{transform:translateX(0)}
  .main{margin-left:0!important}
  .burger{display:flex!important}
  .overlay{display:block;opacity:0;pointer-events:none;transition:opacity .3s}
  .overlay.show{opacity:1;pointer-events:all}
  .topbar{padding:0 14px}
  .page-title{font-size:15px}
  .content{padding:12px;overflow-x:hidden}
  .stats-row{grid-template-columns:1fr 1fr}
  .grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .opts-g{grid-template-columns:1fr}
  .egrid{grid-template-columns:1fr!important}
  .esticky{position:static!important}
  .sh{flex-direction:column;align-items:flex-start}
  .qcard-acts .btn{font-size:12px;padding:5px 8px}
  .stat-val{font-size:20px}
  .card{padding:14px}
  .mhead,.mbody,.mfoot{padding:14px 16px}
  .modal{border-radius:12px}
  table{font-size:12px}
  th,td{padding:8px 10px}
  .btn-sm{padding:5px 10px;font-size:12px}
  .play-wrap{padding:0}
  .topbar .btn-ghost.btn-sm span{display:none}
}
@media(max-width:480px){
  .stats-row{grid-template-columns:1fr 1fr}
  .tags{flex-wrap:wrap}
  .qcard-acts{flex-wrap:wrap}
  .pages{gap:2px}
  .pg{width:28px;height:28px;font-size:12px}
}
@media(max-width:360px){
  .stats-row{grid-template-columns:1fr}
  .login-box{padding:22px 16px}
  .content{padding:10px}
}

/* ── Animations ───────────────────────────────────────────── */
@keyframes fu{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}
.fu{animation:fu .35s ease both}
.fu1{animation-delay:.05s}.fu2{animation-delay:.1s}.fu3{animation-delay:.15s}