:root{--bg:#f4f6f8;--card:#fff;--text:#15202b;--muted:#667085;--line:#dfe4ea;--primary:#155eef;--primary2:#0b4acb;--ok:#157347;--bad:#b42318;--warn:#b54708;--chip:#eef4ff;--shadow:0 10px 30px rgba(16,24,40,.08)}
[data-theme="dark"]{--bg:#0e131a;--card:#171e27;--text:#f1f5f9;--muted:#a6b0bf;--line:#2b3542;--primary:#72a1ff;--primary2:#9ab9ff;--ok:#67d89a;--bad:#ff8b83;--warn:#ffbd66;--chip:#182a49;--shadow:0 10px 30px rgba(0,0,0,.28)}
*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}button,input,select{font:inherit}.app{min-height:100vh}.topbar{position:sticky;top:0;z-index:10;background:color-mix(in srgb,var(--card) 92%, transparent);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}.topbar-inner{max-width:1100px;margin:auto;padding:12px 18px;display:flex;align-items:center;gap:12px}.brand{font-weight:800;letter-spacing:-.02em;cursor:pointer}.brand small{display:block;font-size:11px;color:var(--muted);font-weight:600}.spacer{flex:1}.iconbtn{border:1px solid var(--line);background:var(--card);color:var(--text);border-radius:12px;padding:9px 11px;cursor:pointer}.container{max-width:1100px;margin:auto;padding:22px 18px 80px}.hero{display:grid;grid-template-columns:1.6fr 1fr;gap:18px;margin-bottom:20px}.panel,.card{background:var(--card);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}.panel{padding:22px}.hero h1{font-size:clamp(28px,5vw,46px);line-height:1.02;margin:0 0 12px;letter-spacing:-.04em}.muted{color:var(--muted)}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:16px}.stat{padding:14px;border:1px solid var(--line);border-radius:14px}.stat b{display:block;font-size:22px}.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.btn{border:0;border-radius:12px;padding:11px 15px;font-weight:700;cursor:pointer;background:var(--primary);color:white}.btn:hover{filter:brightness(.96)}.btn.secondary{background:var(--card);color:var(--text);border:1px solid var(--line)}.btn.danger{background:var(--bad)}.btn:disabled{opacity:.45;cursor:not-allowed}.section-title{display:flex;align-items:end;justify-content:space-between;gap:12px;margin:26px 0 12px}.section-title h2{margin:0;font-size:22px}.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.band-card{padding:16px;cursor:pointer;transition:.15s transform}.band-card:hover{transform:translateY(-2px)}.band-num{font-size:12px;font-weight:800;color:var(--primary);text-transform:uppercase}.band-card h3{margin:7px 0;font-size:17px}.progress{height:8px;background:var(--bg);border-radius:999px;overflow:hidden;margin:10px 0}.progress>span{display:block;height:100%;background:var(--primary);border-radius:999px}.badge{display:inline-flex;align-items:center;gap:5px;padding:5px 9px;border-radius:999px;background:var(--chip);color:var(--primary);font-size:12px;font-weight:700}.toolbar{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:16px}.toolbar select,.toolbar input{border:1px solid var(--line);background:var(--card);color:var(--text);padding:10px 12px;border-radius:12px}.qwrap{max-width:820px;margin:auto}.qmeta{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:12px}.qcard{padding:22px}.qcard h2{font-size:22px;line-height:1.35;margin:6px 0 18px}.options{display:grid;gap:10px}.option{display:flex;gap:12px;align-items:flex-start;border:1.5px solid var(--line);background:var(--card);padding:13px;border-radius:14px;cursor:pointer;text-align:left;color:var(--text)}.option:hover{border-color:var(--primary)}.option.selected{border-color:var(--primary);background:var(--chip)}.option.correct{border-color:var(--ok);background:color-mix(in srgb,var(--ok) 10%,var(--card))}.option.wrong{border-color:var(--bad);background:color-mix(in srgb,var(--bad) 10%,var(--card))}.letter{font-weight:800;min-width:24px}.feedback{margin-top:16px;padding:15px;border-radius:14px;border:1px solid var(--line);line-height:1.5}.feedback.ok{border-color:color-mix(in srgb,var(--ok) 55%,var(--line))}.feedback.bad{border-color:color-mix(in srgb,var(--bad) 55%,var(--line))}.qnav{display:flex;justify-content:space-between;gap:10px;margin-top:16px}.tiny{font-size:12px}.search-results{display:grid;gap:10px}.result{padding:14px;cursor:pointer}.result strong{display:block;margin-bottom:5px}.empty{text-align:center;padding:35px;color:var(--muted)}.exam-header{display:flex;gap:10px;align-items:center;justify-content:space-between;margin-bottom:12px}.timer{font-variant-numeric:tabular-nums;font-size:20px;font-weight:800}.timer.warn{color:var(--bad)}.exam-grid{display:grid;grid-template-columns:1fr 220px;gap:16px}.palette{padding:12px;position:sticky;top:82px;height:max-content}.palette-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:6px}.pal{border:1px solid var(--line);background:var(--card);color:var(--text);border-radius:8px;padding:7px 0;cursor:pointer}.pal.answered{background:var(--chip);border-color:var(--primary)}.pal.current{outline:2px solid var(--primary)}.score{font-size:44px;font-weight:900;letter-spacing:-.04em}.review-item{padding:14px;margin-top:10px}.footer-note{margin-top:32px;color:var(--muted);font-size:12px;text-align:center}.toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);background:var(--text);color:var(--card);padding:10px 14px;border-radius:10px;z-index:30;opacity:0;pointer-events:none;transition:.2s}.toast.show{opacity:1}.install-help{font-size:13px;line-height:1.5}.hidden{display:none!important}
@media(max-width:850px){.hero{grid-template-columns:1fr}.grid{grid-template-columns:repeat(2,1fr)}.exam-grid{grid-template-columns:1fr}.palette{position:static}.palette-grid{grid-template-columns:repeat(10,1fr)}}
@media(max-width:520px){.container{padding:16px 12px 70px}.grid{grid-template-columns:1fr}.panel,.qcard{padding:16px}.stats{grid-template-columns:1fr 1fr}.stats .stat:last-child{grid-column:1/-1}.qcard h2{font-size:19px}.palette-grid{grid-template-columns:repeat(8,1fr)}}
.auth-page{min-height:100vh;display:grid;place-items:center;padding:20px;background:linear-gradient(145deg,#eef4ff,#f8fafc)}.auth-card{width:min(440px,100%);background:#fff;color:#15202b;border:1px solid #dfe4ea;border-radius:20px;padding:28px;box-shadow:0 18px 55px rgba(16,24,40,.13)}.auth-card h1{margin:14px 0 6px;font-size:34px}.auth-card form{display:grid;gap:14px;margin-top:20px}.auth-card label{display:grid;gap:6px;font-size:13px;font-weight:700}.auth-card input{width:100%;border:1px solid #d0d5dd;border-radius:12px;padding:12px;background:#fff;color:#15202b}.auth-card .btn{width:100%}.auth-message{margin-top:14px;padding:12px;border-radius:12px;background:#eef4ff;color:#0b4acb;font-size:13px;line-height:1.45}
.admin-link{border-color:var(--primary);color:var(--primary)}.admin-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:14px}.admin-table-wrap{overflow-x:auto}.admin-table{width:100%;border-collapse:collapse;min-width:760px}.admin-table th,.admin-table td{text-align:left;padding:14px;border-bottom:1px solid var(--line)}.admin-table th{font-size:12px;color:var(--muted);text-transform:uppercase}.admin-table td small{display:block;color:var(--muted);margin-top:4px}.status{display:inline-flex;padding:5px 9px;border-radius:999px;font-size:12px;font-weight:800}.status.active{background:color-mix(in srgb,var(--ok) 14%,var(--card));color:var(--ok)}.status.blocked{background:color-mix(in srgb,var(--bad) 12%,var(--card));color:var(--bad)}.btn.compact{padding:7px 10px;font-size:12px}.admin-note{margin-top:12px}.admin-loading{text-align:center;padding:40px}
.auth-access-note{text-align:center;color:#667085;font-size:12px;margin:18px 0 0}.admin-actions{margin-top:0}.modal-backdrop{position:fixed;inset:0;z-index:100;background:rgba(15,23,42,.58);display:grid;place-items:center;padding:18px}.modal-card{width:min(480px,100%);background:var(--card);border:1px solid var(--line);border-radius:20px;padding:22px;box-shadow:0 24px 80px rgba(0,0,0,.3)}.modal-head{display:flex;align-items:flex-start;justify-content:space-between;gap:15px}.modal-head h2{margin:8px 0 16px}.modal-card form{display:grid;gap:14px}.modal-card label{display:grid;gap:6px;font-size:13px;font-weight:700}.modal-card input{width:100%;border:1px solid var(--line);border-radius:12px;padding:12px;background:var(--card);color:var(--text)}
.owner-protected{display:inline-flex;padding:5px 9px;border-radius:999px;background:var(--chip);color:var(--primary);font-size:12px;font-weight:800}
@media(max-width:620px){.admin-summary{grid-template-columns:1fr}.topbar-inner{flex-wrap:wrap}.topbar-inner .brand{min-width:55%}}