*{box-sizing:border-box;margin:0;padding:0}
:root{
  --navy:#0a1628; --navy2:#112240; --navy3:#1a3a6e;
  --blue:#2563a8; --blue2:#3b82c4; --blue3:#60a8e0;
  --gold:#c9a84c; --gold2:#e0c068; --gold3:#f5d980;
  --bg:#ddeeff; --bg2:#cce0f5; --bg3:#bbcfe8;
  --card:#eaf4ff; --white:#f5faff;
  --tx:#0a1628; --tx70:rgba(10,22,40,.7); --tx45:rgba(10,22,40,.45);
  --bdr:rgba(10,22,40,.12); --bdr2:rgba(10,22,40,.08);
  --fd:'Fraunces',Georgia,serif; --fb:'Plus Jakarta Sans',system-ui,sans-serif;
  --s1:0 2px 12px rgba(10,22,40,.08); --s2:0 8px 32px rgba(10,22,40,.12);
  --danger:#b3261e; --ok:#1e7a3d;
}
html{scroll-behavior:smooth}
body{font-family:var(--fb);background:var(--bg);color:var(--tx);min-height:100vh;display:flex;flex-direction:column}
a{color:var(--blue)}

.hub-nav{background:var(--navy);padding:1rem 2rem;display:flex;align-items:center;justify-content:space-between}
.hub-nav .brand{font-family:var(--fd);color:#fff;font-weight:600;font-size:1.15rem;text-decoration:none}
.hub-nav .brand span{color:var(--gold3)}
.hub-nav .who{color:rgba(255,255,255,.7);font-size:.85rem;display:flex;align-items:center;gap:1rem}
.hub-nav .who a{color:rgba(255,255,255,.85);text-decoration:none;font-weight:600}
.hub-nav .who a:hover{color:var(--gold3)}

.hub-main{flex:1;width:100%;max-width:880px;margin:0 auto;padding:2.5rem 1.5rem 4rem}
.hub-title{font-family:var(--fd);font-size:1.9rem;font-weight:600;margin-bottom:.4rem}
.hub-sub{color:var(--tx70);margin-bottom:2rem}

.card{background:var(--card);border:1px solid var(--bdr);border-radius:14px;padding:1.8rem;box-shadow:var(--s1)}
.card + .card{margin-top:1.2rem}

.auth-wrap{max-width:420px;margin:3rem auto;padding:0 1.5rem}
.auth-card{background:var(--white);border:1px solid var(--bdr);border-radius:16px;padding:2.2rem;box-shadow:var(--s2)}
.auth-card h1{font-family:var(--fd);font-size:1.5rem;margin-bottom:.3rem}
.auth-card p.hint{color:var(--tx45);font-size:.88rem;margin-bottom:1.4rem}

label{display:block;font-size:.8rem;font-weight:600;letter-spacing:.02em;margin:1rem 0 .35rem}
label:first-of-type{margin-top:0}
input[type=text],input[type=email],input[type=password]{
  width:100%;padding:.75rem .9rem;border:1.5px solid var(--bdr);border-radius:8px;
  font-family:var(--fb);font-size:.95rem;background:#fff;color:var(--tx)
}
input:focus{outline:none;border-color:var(--blue2)}

.btn{font-family:var(--fb);font-weight:600;font-size:.82rem;letter-spacing:.03em;border:none;cursor:pointer;
  display:inline-flex;align-items:center;justify-content:center;border-radius:8px;transition:.25s;
  text-decoration:none;padding:.85rem 1.6rem}
.btn-solid{background:var(--navy);color:#fff;width:100%;margin-top:1.4rem}
.btn-solid:hover{background:var(--navy2)}
.btn-outline{background:transparent;color:var(--navy);border:1.5px solid var(--navy)}
.btn-outline:hover{background:var(--navy);color:#fff}
.btn[disabled]{opacity:.45;cursor:not-allowed}

.msg{padding:.8rem 1rem;border-radius:8px;font-size:.87rem;margin-bottom:1.2rem}
.msg-error{background:#fdecea;color:var(--danger);border:1px solid rgba(179,38,30,.25)}
.msg-ok{background:#eaf6ee;color:var(--ok);border:1px solid rgba(30,122,61,.25)}

.hub-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.2rem}
@media(max-width:640px){.hub-grid{grid-template-columns:1fr}}
.hub-option{background:var(--white);border:1px solid var(--bdr);border-radius:14px;padding:1.8rem;box-shadow:var(--s1);text-decoration:none;color:var(--tx);display:block;transition:.25s}
.hub-option:hover{box-shadow:var(--s2);transform:translateY(-2px)}
.hub-option h3{font-family:var(--fd);font-size:1.25rem;margin-bottom:.4rem}
.hub-option p{color:var(--tx70);font-size:.9rem}
.hub-option.disabled{opacity:.55;pointer-events:none}
.tag-soon{display:inline-block;background:var(--bg3);color:var(--tx70);font-size:.68rem;font-weight:700;letter-spacing:.05em;padding:.2rem .55rem;border-radius:6px;margin-top:.6rem;text-transform:uppercase}

.test-list{display:grid;grid-template-columns:1fr 1fr 1fr;gap:.9rem}
@media(max-width:760px){.test-list{grid-template-columns:1fr 1fr}}
@media(max-width:480px){.test-list{grid-template-columns:1fr}}
.test-card{background:var(--white);border:1px solid var(--bdr);border-radius:12px;padding:1.1rem;text-align:center}
.test-card .num{font-family:var(--fd);font-size:1.4rem;color:var(--navy)}
.test-card .btn{margin-top:.7rem;padding:.55rem 1rem;font-size:.75rem}
.attempt-note{font-size:.72rem;color:var(--tx45);margin-top:.35rem}

.q-block{background:var(--white);border:1px solid var(--bdr);border-radius:12px;padding:1.3rem 1.4rem;margin-bottom:1rem}
.q-text{font-weight:600;margin-bottom:.8rem}
.opt{display:flex;gap:.6rem;align-items:flex-start;padding:.5rem 0;cursor:pointer;font-size:.92rem}
.opt input{margin-top:.2rem}
#hub-timer{position:sticky;top:0;background:var(--gold3);color:var(--navy);text-align:center;font-weight:700;padding:.6rem;border-radius:8px;margin-bottom:1.4rem;z-index:5}

.result-summary{text-align:center;padding:2rem 1rem}
.result-score{font-family:var(--fd);font-size:3rem;font-weight:700}
.result-pass{color:var(--ok)}
.result-fail{color:var(--danger)}
.review-item{border-left:4px solid var(--ok);padding:.7rem 1rem;margin-bottom:.7rem;background:var(--white);border-radius:0 8px 8px 0}
.review-item.wrong{border-left-color:var(--danger)}
.review-item .yours{font-size:.85rem;color:var(--tx70)}

table.admin-table{width:100%;border-collapse:collapse;margin-top:1.5rem;font-size:.87rem}
table.admin-table th,table.admin-table td{text-align:left;padding:.6rem .7rem;border-bottom:1px solid var(--bdr)}
table.admin-table th{color:var(--tx45);font-size:.72rem;text-transform:uppercase;letter-spacing:.05em}
code.code{background:var(--bg3);padding:.15rem .45rem;border-radius:5px;font-weight:700;letter-spacing:.04em}

.hub-footer{text-align:center;color:var(--tx45);font-size:.78rem;padding:1.5rem}