:root{
  --navy:#0a0f1e; --navy2:#111827; --navy3:#1a2540; --navy4:#1e3a6e;
  --gold:#f5a623; --gold2:#fbbf24; --goldd:rgba(245,166,35,.15); --goldg:rgba(245,166,35,.3);
  --bg:#f0f4ff; --card:#fff; --card2:#f8faff;
  --border:rgba(30,58,110,.1); --border2:rgba(30,58,110,.06);
  --tx:#0a0f1e; --t2:#4a5568; --t3:#94a3b8;
  --gr:#00c896; --grb:rgba(0,200,150,.1);
  --rd:#ff4757; --rdb:rgba(255,71,87,.1);
  --sh0:0 1px 3px rgba(10,15,30,.08); --sh1:0 4px 16px rgba(10,15,30,.1); --sh2:0 10px 40px rgba(10,15,30,.15);
  --shg:0 0 0 1px var(--goldg),0 8px 32px rgba(245,166,35,.2);
  --r1:8px; --r2:14px; --r3:20px; --r4:28px; --rf:999px;
  --tr:.2s cubic-bezier(.4,0,.2,1);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent;}
html{scroll-behavior:smooth;}
body{background:var(--bg);color:var(--tx);font-family:'Inter',sans-serif;font-size:15px;line-height:1.5;overflow-x:hidden;-webkit-font-smoothing:antialiased;}
button,input,select,textarea{font-family:inherit;outline:none;border:none;}
img{display:block;max-width:100%;}

/* Typography */
.G{font-family:'Space Grotesk',sans-serif;}
.hero-title{font-family:'Space Grotesk',sans-serif;font-size:32px;font-weight:800;letter-spacing:-.5px;line-height:1.1;}
.section-title{font-family:'Space Grotesk',sans-serif;font-size:19px;font-weight:700;}
.label{font-size:11px;font-weight:700;letter-spacing:1.2px;text-transform:uppercase;color:var(--t3);}

/* Pages */
.pg{display:none;min-height:100vh;}

/* Hero */
.hero{background:linear-gradient(160deg,var(--navy) 0%,var(--navy3) 50%,#162d5e 100%);position:relative;overflow:hidden;}
.hero::before{content:'';position:absolute;top:-40%;right:-15%;width:500px;height:500px;background:radial-gradient(circle,rgba(245,166,35,.1) 0%,transparent 70%);pointer-events:none;}
.hero::after{content:'';position:absolute;bottom:-30%;left:-10%;width:350px;height:350px;background:radial-gradient(circle,rgba(30,58,110,.5) 0%,transparent 70%);pointer-events:none;}

/* Cards */
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--r3);padding:18px;box-shadow:var(--sh0);}
.card-dark{background:var(--navy2);border:1px solid rgba(255,255,255,.06);border-radius:var(--r3);padding:18px;}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 22px;border-radius:var(--r2);font-weight:700;font-size:14px;font-family:'Space Grotesk',sans-serif;cursor:pointer;transition:all var(--tr);white-space:nowrap;border:none;}
.btn:active{transform:scale(.97);}
.btn-navy{background:linear-gradient(135deg,var(--navy4),#2d5a9e);color:#fff;box-shadow:0 4px 16px rgba(30,58,110,.3);}
.btn-gold{background:linear-gradient(135deg,var(--gold),#e8960f);color:var(--navy);font-weight:800;box-shadow:0 4px 16px var(--goldg);}
.btn-outline{background:transparent;color:var(--navy4);border:1.5px solid var(--navy4);}
.btn-ghost{background:rgba(30,58,110,.06);color:var(--navy4);}
.btn-danger{background:transparent;color:var(--rd);border:1.5px solid var(--rd);}
.btn-sm{padding:9px 16px;font-size:12px;border-radius:var(--r1);}
.btn-fw{width:100%;}
.btn-icon{width:40px;height:40px;padding:0;border-radius:var(--r2);background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.15);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;}

/* Inputs */
.inp{background:var(--card2);border:1.5px solid var(--border);color:var(--tx);padding:13px 16px;border-radius:var(--r2);font-size:15px;width:100%;transition:border-color var(--tr),box-shadow var(--tr);}
.inp:focus{border-color:var(--navy4);box-shadow:0 0 0 3px rgba(30,58,110,.1);}
.inp::placeholder{color:var(--t3);}
select.inp{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;}
select.inp option{background:#ffffff;color:#0f172a;}
#landing-language-select{background:rgba(255,255,255,.08);color:#ffffff;}
#landing-language-select option{background:#0f172a;color:#ffffff;}
#profile-language-select option{background:#ffffff;color:#0f172a;}
.lbl{display:block;margin-bottom:7px;font-size:12px;font-weight:600;color:var(--t2);}

/* Badges */
.badge{display:inline-flex;align-items:center;gap:4px;padding:3px 10px;border-radius:var(--rf);font-size:11px;font-weight:700;letter-spacing:.3px;}
.badge-navy{background:rgba(30,58,110,.1);color:var(--navy4);}
.badge-gold{background:var(--goldd);color:var(--gold);border:1px solid var(--goldg);}
.badge-green{background:var(--grb);color:var(--gr);}
.badge-red{background:var(--rdb);color:var(--rd);}

/* Tabs */
.tabs{display:flex;background:var(--card2);border:1px solid var(--border);border-radius:var(--r2);padding:4px;gap:3px;margin-bottom:18px;}
.tab{flex:1;padding:9px 6px;border:none;border-radius:10px;font-size:13px;font-weight:600;background:transparent;color:var(--t3);cursor:pointer;transition:all var(--tr);}
.tab.on{background:var(--card);color:var(--navy4);box-shadow:var(--sh0);}

/* Leaderboard period tabs on dark hero */
#pg-leaderboard .tab{color:rgba(255,255,255,.6);}
#pg-leaderboard .tab.on{color:#000;}

/* Contest tabs */
.ctab{flex-shrink:0;padding:8px 16px;border-radius:var(--rf);border:1.5px solid var(--border);background:transparent;color:var(--t2);font-size:12px;font-weight:700;font-family:'Space Grotesk',sans-serif;cursor:pointer;transition:all var(--tr);}
.ctab.on{background:var(--navy4);color:#fff;border-color:var(--navy4);}
.ctab.gold{background:var(--gold);color:var(--navy);border-color:var(--gold);}

/* Quiz options */
.opt{background:var(--card);border:1.5px solid var(--border);color:var(--tx);padding:14px 18px;border-radius:var(--r2);cursor:pointer;text-align:left;font-size:14px;width:100%;display:flex;justify-content:space-between;align-items:center;transition:all var(--tr);font-weight:500;}
.opt:hover:not(:disabled){border-color:var(--navy4);background:rgba(30,58,110,.03);}
.opt.ok{border-color:var(--gr);background:var(--grb);color:var(--gr);pointer-events:none;}
.opt.ok::after{content:'✓';font-weight:800;font-size:16px;}
.opt.no{border-color:var(--rd);background:var(--rdb);color:var(--rd);pointer-events:none;}
.opt.no::after{content:'✗';font-weight:800;font-size:16px;}

/* Subscription plans */
.plan-card{border:1.5px solid var(--border);border-radius:var(--r3);padding:16px 18px;cursor:pointer;transition:all var(--tr);position:relative;display:flex;align-items:center;gap:14px;margin-bottom:10px;}
.plan-card:hover{border-color:var(--gold);background:rgba(245,166,35,.03);}
.plan-card.selected{border-color:var(--gold);background:var(--goldd);box-shadow:var(--shg);}
.plan-radio{width:22px;height:22px;border-radius:50%;border:2px solid var(--t3);flex-shrink:0;display:flex;align-items:center;justify-content:center;transition:all var(--tr);}
.plan-card.selected .plan-radio{border-color:var(--gold);background:var(--gold);}
.plan-radio-dot{width:9px;height:9px;border-radius:50%;background:#fff;display:none;}
.plan-card.selected .plan-radio-dot{display:block;}

/* Progress */
.prog-track{background:var(--border2);border-radius:var(--rf);height:6px;overflow:hidden;}
.prog-fill{height:100%;border-radius:var(--rf);transition:width .5s cubic-bezier(.4,0,.2,1);}

/* Admin */
.ai{background:#111827;border:1px solid rgba(255,255,255,.1);color:#f1f5f9;padding:10px 14px;border-radius:var(--r1);font-size:13px;width:100%;transition:border-color var(--tr);}
.ai:focus{border-color:var(--gold);}
.abtn{border-radius:var(--r1);font-size:13px;font-weight:600;padding:9px 16px;cursor:pointer;transition:all var(--tr);border:none;}
.abtn-gold{background:var(--gold);color:var(--navy);}
.abtn-ghost{background:rgba(255,255,255,.06);color:#94a3b8;}
.ac{background:#111827;border:1px solid rgba(255,255,255,.06);border-radius:var(--r2);padding:16px;margin-bottom:12px;}
.an{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:var(--r1);cursor:pointer;font-size:13px;font-weight:500;color:#64748b;transition:all var(--tr);}
.an:hover{background:rgba(255,255,255,.04);}
.an.on{color:var(--gold);background:rgba(245,166,35,.1);}

/* Misc */
@keyframes pulse-dot{0%,100%{opacity:1;transform:scale(1);}50%{opacity:.5;transform:scale(1.4);}}
.dot{width:8px;height:8px;border-radius:50%;background:var(--rd);display:inline-block;animation:pulse-dot 1.2s ease-in-out infinite;}
.wrap{padding:20px 18px 100px;}
.hf{flex-shrink:0;padding:6px 14px;border-radius:var(--rf);border:1.5px solid var(--border);background:transparent;color:var(--t3);font-size:12px;font-weight:700;cursor:pointer;transition:all var(--tr);}
.hf.on{background:var(--navy4);color:#fff;border-color:var(--navy4);}

/* Notifications */
.noti-pop{position:absolute;top:52px;right:0;width:min(320px,calc(100vw - 36px));background:#fff;border:1px solid var(--border);border-radius:18px;box-shadow:var(--sh2);overflow:hidden;z-index:120;}
.noti-pop-head{display:flex;align-items:center;justify-content:space-between;padding:14px 14px 10px;border-bottom:1px solid var(--border2);font-size:14px;font-weight:800;color:var(--navy4);}
.noti-close{width:28px;height:28px;border-radius:999px;background:var(--card2);color:var(--t2);cursor:pointer;font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center;}
.noti-list{max-height:360px;overflow:auto;padding:10px;display:flex;flex-direction:column;gap:8px;background:linear-gradient(180deg,#fff 0%,#f8fbff 100%);}
.noti-item{padding:12px;border-radius:14px;border:1px solid var(--border);background:#fff;display:flex;gap:10px;align-items:flex-start;}
.noti-item.unread{border-color:var(--goldg);background:rgba(245,166,35,.06);}
.noti-ico{width:34px;height:34px;border-radius:12px;background:var(--card2);display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:17px;}
.noti-body{flex:1;min-width:0;}
.noti-title{font-size:13px;font-weight:700;color:var(--tx);margin-bottom:3px;line-height:1.35;}
.noti-msg{font-size:12px;color:var(--t2);line-height:1.45;}
.noti-time{font-size:10px;color:var(--t3);margin-top:5px;font-weight:700;letter-spacing:.2px;}
.noti-empty{padding:18px 12px;text-align:center;color:var(--t2);font-size:13px;}

/* Nav */
#nav{position:fixed;bottom:0;left:0;right:0;background:rgba(255,255,255,.97);backdrop-filter:blur(20px);border-top:1px solid var(--border);display:none;justify-content:space-around;align-items:center;padding:8px 0 max(16px,env(safe-area-inset-bottom));z-index:9999;box-shadow:0 -4px 24px rgba(10,15,30,.08);}
#nav.on{display:flex;}
.ni{display:flex;flex-direction:column;align-items:center;gap:3px;cursor:pointer;padding:6px 12px;color:var(--t3);font-size:10px;font-weight:700;font-family:'Space Grotesk',sans-serif;transition:color var(--tr);}
.ni.on{color:var(--gold);}
.ni-bell{position:relative;}
.ni-bell-dot{position:absolute;top:2px;right:16px;width:7px;height:7px;background:var(--rd);border-radius:50%;border:2px solid white;}

/* Prize rows */
.prize-row{display:flex;justify-content:space-between;align-items:center;padding:9px 12px;border-radius:var(--r1);margin-bottom:5px;}
.prize-gold{background:linear-gradient(135deg,rgba(245,166,35,.18),rgba(245,166,35,.06));border:1px solid var(--goldg);}
.prize-std{background:var(--card2);}

/* Social links */
.social-links{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;}
.social-btn{
  width:42px;height:42px;border-radius:12px;
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.09);
  border:1px solid rgba(255,255,255,.2);
  color:#fff;
  transition:transform var(--tr),background var(--tr),border-color var(--tr);
}
.social-btn:hover{transform:translateY(-2px);background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.36);}
.social-btn svg{width:19px;height:19px;fill:currentColor;display:block;}

/* Stat */
.stat-num{font-family:'Space Grotesk',sans-serif;font-size:26px;font-weight:800;line-height:1;}
.stat-lbl{font-size:11px;color:var(--t2);margin-top:4px;}

/* Practice category buttons */
.pcat{background:var(--card2);border:1px solid var(--border);border-radius:var(--r2);padding:12px 6px;text-align:center;cursor:pointer;font-size:22px;transition:all var(--tr);}
.pcat:hover{border-color:var(--navy4);background:rgba(30,58,110,.04);}