@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800&display=swap');
:root{
  --bg:#F8FAFB;--card:#FFFFFF;--hover:#F1F4F8;--input:#F3F5F8;--border:#E4E9F0;--focus:#0E2841;
  --accent:#0E2841;--accent-l:#1A3A5C;--accent-bg:rgba(14,40,65,.05);
  --mint:#00E5A0;--mint-bg:rgba(0,229,160,.06);
  --red:#DC2626;--red-bg:rgba(220,38,38,.05);--orange:#EA580C;--orange-bg:rgba(234,88,12,.05);
  --green:#059669;--green-bg:rgba(5,150,105,.05);--blue:#2563EB;--blue-bg:rgba(37,99,235,.05);
  --purple:#7C3AED;--purple-bg:rgba(124,58,237,.05);
  --t1:#111827;--t2:#4B5563;--t3:#9CA3AF;
  --sw:264px;--r:10px;
  --sh:0 1px 2px rgba(0,0,0,.04),0 1px 3px rgba(0,0,0,.03);
  --sh2:0 4px 12px rgba(0,0,0,.06),0 1px 3px rgba(0,0,0,.04);
  --sh3:0 10px 30px rgba(0,0,0,.08),0 2px 6px rgba(0,0,0,.04)
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'DM Sans',sans-serif;background:var(--bg);color:var(--t1);min-height:100vh;font-size:14px;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none;transition:color .15s}a:hover{color:var(--mint)}
::selection{background:var(--accent);color:#fff}
@keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.5}}
.anim{animation:fadeIn .35s ease-out}

/* Sidebar */
.side{position:fixed;top:0;left:0;bottom:0;width:var(--sw);background:linear-gradient(180deg,#0E2841 0%,#0A1E35 100%);display:flex;flex-direction:column;z-index:100;border-right:1px solid rgba(255,255,255,.04)}
.side-logo{padding:22px 20px;border-bottom:1px solid rgba(255,255,255,.06);display:flex;align-items:center;gap:12px}
.logo-i{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,#00E5A0,#00B8D4);display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:800;color:#0E2841;box-shadow:0 2px 8px rgba(0,229,160,.3)}
.logo-t{font-size:14px;font-weight:700;color:#fff;letter-spacing:2.5px}
.logo-s{font-size:8px;color:#00E5A0;letter-spacing:3px;font-weight:600}
.side-nav{flex:1;padding:12px 8px;display:flex;flex-direction:column;gap:1px;overflow-y:auto}
.ni{display:flex;align-items:center;gap:10px;padding:9px 14px;border-radius:8px;color:rgba(255,255,255,.45);font-size:12.5px;font-weight:500;transition:all .2s;text-decoration:none;position:relative;margin:0 4px}
.ni:hover{background:rgba(255,255,255,.06);color:rgba(255,255,255,.8)}
.ni.on{background:rgba(0,229,160,.08);color:#fff;font-weight:600}
.ni.on::before{content:'';position:absolute;left:-4px;top:50%;transform:translateY(-50%);width:3px;height:18px;background:#00E5A0;border-radius:0 3px 3px 0}
.ni .ic{font-size:15px;width:22px;text-align:center;opacity:.5}
.ni:hover .ic,.ni.on .ic{opacity:1}
.side-user{padding:16px;border-top:1px solid rgba(255,255,255,.06);display:flex;align-items:center;gap:10px}
.av{border-radius:50%;background:linear-gradient(135deg,rgba(0,229,160,.2),rgba(0,184,212,.2));display:flex;align-items:center;justify-content:center;font-weight:700;color:#fff;flex-shrink:0}
.av.adm{background:linear-gradient(135deg,rgba(234,88,12,.3),rgba(220,38,38,.2))}
.uname{font-weight:600;font-size:12px;color:#fff;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.urole{font-size:10px;color:rgba(255,255,255,.35)}
.btn-out{display:flex;align-items:center;padding:7px 10px;border-radius:8px;background:rgba(220,38,38,.1);color:#FCA5A5;border:none;font-size:11px;font-weight:600;cursor:pointer;transition:all .2s;text-decoration:none;font-family:inherit}
.btn-out:hover{background:rgba(220,38,38,.25);color:#fff}
.notif-bell{position:relative;cursor:pointer;font-size:16px;filter:grayscale(1) brightness(2);opacity:.5;transition:opacity .2s}
.notif-bell:hover{opacity:1}
.notif-count{position:absolute;top:-5px;right:-8px;background:#DC2626;color:#fff;font-size:8px;font-weight:700;width:16px;height:16px;border-radius:50%;display:flex;align-items:center;justify-content:center}

/* Main */
.main{margin-left:var(--sw);padding:28px 40px;min-height:100vh}
.pgh{display:flex;justify-content:space-between;align-items:center;margin-bottom:28px;flex-wrap:wrap;gap:14px}
.pgt{font-size:24px;font-weight:700;color:var(--t1);letter-spacing:-.3px}.pgst{color:var(--t3);font-size:13px;margin-top:3px}

/* Cards */
.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:24px;box-shadow:var(--sh);transition:box-shadow .2s}
.card-t{font-weight:700;font-size:15px;margin-bottom:18px;display:flex;align-items:center;gap:8px;color:var(--t1)}

/* Stats */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:28px}
.stat{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:20px;display:flex;align-items:center;gap:16px;box-shadow:var(--sh);transition:all .25s}
.stat:hover{box-shadow:var(--sh2);transform:translateY(-2px)}
.stat-i{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:22px}
.stat-l{font-size:11px;color:var(--t3);font-weight:500;text-transform:uppercase;letter-spacing:.5px}
.stat-v{font-size:28px;font-weight:800;line-height:1.1;letter-spacing:-.5px}

/* Forms */
.fg{margin-bottom:18px}.fl{display:block;margin-bottom:6px;font-size:12px;color:var(--t2);font-weight:600}
.fi{width:100%;padding:11px 14px;background:var(--input);border:1.5px solid var(--border);border-radius:var(--r);color:var(--t1);font-size:13px;outline:none;transition:all .2s;font-family:inherit}
.fi:focus{border-color:var(--mint);box-shadow:0 0 0 3px rgba(0,229,160,.1);background:#fff}
.fi::placeholder{color:var(--t3)}
select.fi{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10'%3E%3Cpath d='M5 7L0 2h10z' fill='%239CA3AF'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:32px}
textarea.fi{resize:vertical;min-height:80px}
.fh{font-size:10px;color:var(--t3);margin-top:4px}
.fr{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:14px}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 22px;border:none;border-radius:var(--r);font-size:13px;font-weight:600;font-family:inherit;cursor:pointer;transition:all .2s;text-decoration:none;line-height:1}
.btn-p{background:var(--accent);color:#fff}.btn-p:hover{background:var(--accent-l);transform:translateY(-1px);box-shadow:0 4px 12px rgba(14,40,65,.2)}
.btn-s{background:var(--card);color:var(--t1);border:1.5px solid var(--border)}.btn-s:hover{border-color:var(--accent);box-shadow:var(--sh)}
.btn-d{background:var(--red);color:#fff}.btn-d:hover{background:#B91C1C}
.btn-g{background:transparent;color:var(--t2);border:1.5px solid var(--border)}.btn-g:hover{color:var(--accent);border-color:var(--accent)}
.btn-sm{padding:6px 14px;font-size:12px;border-radius:8px}.btn-full{width:100%;padding:13px 20px;font-size:14px}
.btns{display:flex;gap:8px;flex-wrap:wrap}

/* Badges */
.bg{display:inline-flex;align-items:center;gap:3px;padding:4px 10px;border-radius:6px;font-size:11px;font-weight:600}
.bg-a{background:var(--accent-bg);color:var(--accent)}.bg-r{background:var(--red-bg);color:var(--red)}
.bg-g{background:var(--green-bg);color:var(--green)}.bg-o{background:var(--orange-bg);color:var(--orange)}
.bg-b{background:var(--blue-bg);color:var(--blue)}.bg-p{background:var(--purple-bg);color:var(--purple)}

/* Flash */
.flash{padding:14px 20px;border-radius:var(--r);margin-bottom:16px;font-size:13px;font-weight:500;display:flex;align-items:center;gap:10px;animation:fadeIn .3s;position:relative}
.fl-ok{background:rgba(5,150,105,.08);border:1px solid rgba(5,150,105,.15);color:#065F46}
.fl-err{background:rgba(220,38,38,.08);border:1px solid rgba(220,38,38,.15);color:#991B1B}
.fl-warn{background:rgba(234,88,12,.08);border:1px solid rgba(234,88,12,.15);color:#9A3412}
.fl-x{position:absolute;right:14px;top:50%;transform:translateY(-50%);background:none;border:none;color:inherit;font-size:18px;cursor:pointer;opacity:.5}.fl-x:hover{opacity:1}

/* Scenario cards */
.sc-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;margin-bottom:28px}
.sc-card{position:relative;background:var(--card);border:1px solid var(--border);border-radius:12px;padding:24px;cursor:pointer;transition:all .25s;overflow:hidden}
.sc-card:hover{box-shadow:var(--sh3);transform:translateY(-3px);border-color:rgba(0,229,160,.2)}
.sc-rib{position:absolute;top:0;left:0;right:0;height:3px}
.sc-title{font-weight:700;font-size:15px;margin-bottom:6px}.sc-desc{font-size:12px;color:var(--t2);line-height:1.6;margin-bottom:16px}
.sc-foot{display:flex;justify-content:space-between;align-items:center}.sc-stats{display:flex;gap:12px;font-size:11px;color:var(--t3)}

/* Play */
.play-wrap{display:grid;grid-template-columns:220px 1fr;gap:24px;min-height:60vh}
.play-side{position:sticky;top:24px;align-self:start}
.pq{display:flex;align-items:center;gap:8px;padding:10px 12px;border-radius:var(--r);border:1.5px solid var(--border);background:var(--card);cursor:pointer;font-size:12px;font-weight:500;color:var(--t2);transition:all .2s;font-family:inherit;text-align:left;width:100%;margin-bottom:4px}
.pq:hover{border-color:var(--mint)}.pq.on{background:var(--mint-bg);color:var(--accent);border-color:var(--mint);font-weight:600}
.pq.done{background:var(--green-bg);color:var(--green)}
.pqn{width:24px;height:24px;border-radius:50%;background:var(--input);display:flex;align-items:center;justify-content:center;font-size:10px;font-weight:700;flex-shrink:0}
.pq.on .pqn{background:var(--mint);color:#0E2841}.pq.done .pqn{background:var(--green);color:#fff}
.timer{font-size:24px;font-weight:800;color:var(--accent);font-family:'DM Sans',monospace}.timer.w{color:var(--orange)}.timer.d{color:var(--red);animation:pulse 1s infinite}
.pbar{height:5px;background:var(--border);border-radius:5px;overflow:hidden;margin-bottom:20px}.pbar-f{height:100%;border-radius:5px;background:linear-gradient(90deg,#00E5A0,#00B8D4);transition:width .4s}

/* Options */
.opt{display:flex;align-items:center;gap:12px;padding:13px 16px;width:100%;background:var(--card);border:2px solid var(--border);border-radius:var(--r);cursor:pointer;text-align:left;color:var(--t1);font-size:13px;transition:all .2s;margin-bottom:8px;font-family:inherit}
.opt:hover{border-color:var(--mint);background:var(--mint-bg)}.opt.sel{border-color:var(--accent);background:var(--accent-bg)}
.opt.ok{border-color:var(--green);background:var(--green-bg)}.opt.bad{border-color:var(--red);background:var(--red-bg)}
.opt-l{width:30px;height:30px;border-radius:50%;background:var(--input);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:12px;color:var(--t2);flex-shrink:0;border:1.5px solid var(--border)}
.opt.sel .opt-l{background:var(--accent);color:#fff;border-color:var(--accent)}
.opt.ok .opt-l{background:var(--green);color:#fff}.opt.bad .opt-l{background:var(--red);color:#fff}
.tf{flex:1;padding:14px;border-radius:var(--r);border:2px solid var(--border);background:var(--card);cursor:pointer;text-align:center;font-weight:600;font-size:14px;transition:all .2s;font-family:inherit}
.tf:hover{border-color:var(--mint)}.tf.sel{border-color:var(--accent);background:var(--accent-bg);color:var(--accent)}
.tf.ok{border-color:var(--green);background:var(--green-bg);color:var(--green)}.tf.bad{border-color:var(--red);background:var(--red-bg);color:var(--red)}
.expl{margin-top:16px;padding:16px 20px;background:var(--blue-bg);border:1px solid rgba(37,99,235,.1);border-radius:var(--r);display:none}
.expl-t{font-weight:700;font-size:12px;color:var(--blue);margin-bottom:4px}.expl-b{font-size:12px;color:var(--t2);line-height:1.6}
.ord-item{display:flex;align-items:center;gap:10px;padding:12px 16px;background:var(--card);border:1.5px solid var(--border);border-radius:var(--r);margin-bottom:6px;cursor:grab;font-size:13px}
.ord-item:active{cursor:grabbing;background:var(--mint-bg);border-color:var(--mint)}
.text-ans{width:100%;padding:14px;background:var(--card);border:2px solid var(--border);border-radius:var(--r);font-size:14px;color:var(--t1);outline:none;font-family:inherit}.text-ans:focus{border-color:var(--mint)}
.ctx{background:var(--input);border:1px solid var(--border);border-radius:var(--r);padding:20px;margin-bottom:20px;font-size:13px}
.ctx-body{white-space:pre-wrap;line-height:1.7;color:var(--t2);border-top:1px solid var(--border);padding-top:14px;margin-top:8px;font-family:monospace;font-size:12px}
.ransom{background:var(--red-bg);padding:18px;border-radius:var(--r);color:var(--red);white-space:pre-wrap;font-family:monospace;font-size:12px;border:1px solid rgba(220,38,38,.15)}
.res{text-align:center;padding:40px 20px}.res-score{font-size:48px;font-weight:800;font-family:'DM Sans',monospace}
.res-score.hi{color:var(--green)}.res-score.mid{color:var(--orange)}.res-score.lo{color:var(--red)}
.rev{padding:14px 18px;border-radius:var(--r);margin-bottom:8px}.rev.ok{background:var(--green-bg)}.rev.bad{background:var(--red-bg)}

/* Leaderboard */
.rk{display:flex;align-items:center;gap:12px;padding:12px 16px;border-radius:var(--r);margin-bottom:4px;transition:background .15s}
.rk:hover{background:var(--hover)}
.rk:nth-child(even){background:var(--input)}.rk.me{background:var(--mint-bg);border:1px solid rgba(0,229,160,.12)}
.pod{display:flex;justify-content:center;align-items:flex-end;gap:20px;margin-bottom:36px;padding:20px 0}
.pod-bar{width:90px;margin-top:10px;border-radius:var(--r) var(--r) 0 0}

/* Tables */
.tw{overflow-x:auto;border-radius:var(--r)}table{width:100%;border-collapse:collapse}
th{text-align:left;padding:12px 16px;font-size:11px;font-weight:600;color:var(--t3);text-transform:uppercase;letter-spacing:.5px;border-bottom:2px solid var(--border);background:var(--input)}
td{padding:12px 16px;font-size:13px;border-bottom:1px solid var(--border)}tr:hover td{background:rgba(0,229,160,.02)}

/* Auth */
.auth-page{min-height:100vh;display:flex}
.auth-left{flex:1;background:linear-gradient(135deg,#0E2841,#0A1E35);display:flex;flex-direction:column;justify-content:center;padding:60px;position:relative;overflow:hidden}
.auth-left::before{content:'';position:absolute;top:-50%;right:-30%;width:80%;height:200%;background:radial-gradient(circle,rgba(0,229,160,.04),transparent 70%);border-radius:50%}
.auth-right{flex:1;display:flex;align-items:center;justify-content:center;padding:40px;background:var(--bg)}
.auth-c{width:100%;max-width:420px}
.auth-card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:40px;box-shadow:var(--sh3)}
.auth-tabs{display:flex;gap:3px;margin-bottom:24px;background:var(--input);border-radius:var(--r);padding:4px}
.auth-tab{flex:1;padding:10px 6px;border-radius:8px;font-size:12px;font-weight:600;text-align:center;color:var(--t3);text-decoration:none;transition:all .2s}
.auth-tab:hover{color:var(--t1)}.auth-tab.on{background:var(--accent);color:#fff}

/* Utilities */
.mt1{margin-top:6px}.mt2{margin-top:14px}.mt3{margin-top:22px}
.mb1{margin-bottom:6px}.mb2{margin-bottom:14px}.mb3{margin-bottom:22px}
.tc{text-align:center}.flex{display:flex}.aic{align-items:center}.jcb{justify-content:space-between}
.g1{gap:6px}.g2{gap:14px}.g3{gap:22px}.fw{flex-wrap:wrap}
.empty{text-align:center;padding:50px;color:var(--t3)}
.notif-bell-w{position:relative;cursor:pointer;font-size:16px}

@media(max-width:1024px){.auth-left{display:none}.auth-page{justify-content:center}}
@media(max-width:900px){.side{width:200px}.main{margin-left:200px;padding:18px}.sc-grid,.play-wrap{grid-template-columns:1fr}}
@media(max-width:640px){.side{display:none}.main{margin-left:0;padding:14px}}

/* Sidebar nav */
.nav-section{margin-bottom:4px}
.nav-label{font-size:10px;font-weight:700;letter-spacing:1.5px;color:var(--t3);padding:10px 16px 6px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;user-select:none;transition:color .2s}
.nav-label:hover{color:var(--accent)}
.nav-arrow{font-size:10px;transition:transform .2s}
.nav-items{overflow:hidden}.nav-items .ni{padding-left:28px;font-size:12px}
.nav-grp{margin-bottom:2px}
.nav-lbl{display:flex;justify-content:space-between;align-items:center;padding:8px 12px;margin:8px 8px 2px;font-size:10px;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;color:rgba(255,255,255,.25);cursor:pointer;border-radius:8px;transition:all .2s;user-select:none;background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.04)}
.nav-lbl:hover{color:rgba(255,255,255,.5);background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.08)}
.nav-lbl span:first-child{display:flex;align-items:center;gap:8px}
.nav-arr{font-size:9px;color:rgba(255,255,255,.15);transition:transform .3s}
.nav-sub{padding:2px 0 4px;overflow:hidden;display:none}
.nav-sub.open{display:block}
.nav-divider{height:1px;margin:10px 16px;background:rgba(255,255,255,.05)}