:root{
  --bg:#070b14;--panel:#0f1728;--panel-2:#151f34;--text:#eef4ff;--muted:#98a8c2;
  --line:#26344f;--primary:#6ea8fe;--primary-2:#3d7be0;--danger:#ff6b7d;--warning:#ffc857;
  --success:#45d19b;--shadow:0 24px 80px rgba(0,0,0,.35);--radius:18px;--input:#0a1120;
}
body.theme-light{
  --bg:#eef3f9;--panel:#fff;--panel-2:#f7f9fc;--text:#152033;--muted:#607089;--line:#dbe3ef;
  --primary:#245fd3;--primary-2:#1747a6;--danger:#c83d50;--warning:#a86f00;--success:#17855e;
  --shadow:0 24px 70px rgba(31,58,101,.14);--input:#fff;
}
*{box-sizing:border-box}
html{min-height:100%;background:var(--bg)}
body{margin:0;min-height:100%;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:radial-gradient(circle at 20% 0%,rgba(61,123,224,.16),transparent 34%),var(--bg);color:var(--text);line-height:1.55}
a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}
button,input,textarea,select{font:inherit}
.container{width:min(1180px,calc(100% - 32px));margin:0 auto}
.narrow{width:min(760px,calc(100% - 28px));margin:0 auto}
.topbar{position:sticky;top:0;z-index:30;border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(15px)}
.topbar-inner{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;color:var(--text)}
.brand-mark{width:46px;height:46px;border-radius:14px;display:inline-grid;place-items:center;background:linear-gradient(135deg,var(--primary),#9a7bff);color:#fff;font-weight:900;letter-spacing:-.04em;box-shadow:0 10px 30px rgba(61,123,224,.3)}
.nav{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.nav a{color:var(--muted);padding:8px 10px;border-radius:10px}.nav a:hover,.nav a.active{color:var(--text);background:var(--panel-2);text-decoration:none}
main{padding:34px 0 64px}.panel{background:linear-gradient(180deg,color-mix(in srgb,var(--panel) 96%,white 4%),var(--panel));border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px}
.panel + .panel{margin-top:22px}.install-shell,.auth-shell{min-height:100vh;display:grid;place-items:center;padding:24px}.install-panel{width:min(860px,100%)}.auth-panel{width:min(500px,100%)}
.eyebrow{font-size:.78rem;letter-spacing:.14em;font-weight:800;color:var(--primary);margin:12px 0 4px}.muted{color:var(--muted)}
h1,h2,h3{line-height:1.18;margin-top:0}h1{font-size:clamp(2rem,5vw,3.2rem);letter-spacing:-.045em}h2{font-size:1.35rem;margin-top:28px}h3{font-size:1.06rem}
.form-grid{display:grid;gap:16px}.form-grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.span-2{grid-column:span 2}
label{display:block;font-weight:700;font-size:.92rem;color:var(--text)}
input,textarea,select{width:100%;margin-top:7px;border:1px solid var(--line);background:var(--input);color:var(--text);border-radius:12px;padding:12px 13px;outline:none;transition:.2s border,.2s box-shadow}
textarea{min-height:220px;resize:vertical}input:focus,textarea:focus,select:focus{border-color:var(--primary);box-shadow:0 0 0 4px color-mix(in srgb,var(--primary) 18%,transparent)}
.check-row{display:flex;gap:10px;align-items:flex-start;margin:18px 0;color:var(--muted);font-weight:600}.check-row input{width:auto;margin:4px 0 0}
.btn{appearance:none;border:0;border-radius:12px;padding:12px 17px;font-weight:800;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:.18s transform,.18s opacity,.18s background;text-decoration:none}.btn:hover{transform:translateY(-1px);text-decoration:none}.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff}.btn-secondary{background:var(--panel-2);color:var(--text);border:1px solid var(--line)}.btn-danger{background:var(--danger);color:#fff}.btn-success{background:var(--success);color:#06140f}.btn-block{width:100%}.btn-sm{padding:8px 11px;font-size:.86rem}
.alert{border:1px solid var(--line);border-left-width:5px;border-radius:12px;padding:13px 15px;margin:16px 0;background:var(--panel-2)}.alert-danger{border-left-color:var(--danger)}.alert-warning{border-left-color:var(--warning)}.alert-success{border-left-color:var(--success)}.alert-info{border-left-color:var(--primary)}
.grid{display:grid;gap:20px}.grid.cards{grid-template-columns:repeat(4,minmax(0,1fr))}.stat{padding:20px}.stat .number{font-size:2rem;font-weight:900;letter-spacing:-.04em}.stat .label{color:var(--muted);font-size:.88rem}
.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:14px}table{width:100%;border-collapse:collapse;min-width:760px}th,td{padding:13px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}th{font-size:.78rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);background:var(--panel-2)}tr:last-child td{border-bottom:0}
.badge{display:inline-flex;align-items:center;border:1px solid var(--line);background:var(--panel-2);padding:5px 9px;border-radius:999px;font-size:.78rem;font-weight:800}.badge-success{color:var(--success)}.badge-warning{color:var(--warning)}.badge-danger{color:var(--danger)}.badge-info{color:var(--primary)}
.actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.split{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
.rules{display:grid;gap:13px;margin:22px 0}.rule{display:grid;grid-template-columns:34px 1fr;gap:12px;align-items:start;padding:14px;background:var(--panel-2);border:1px solid var(--line);border-radius:14px}.rule strong{display:block}.rule-icon{width:34px;height:34px;border-radius:10px;background:color-mix(in srgb,var(--primary) 18%,transparent);display:grid;place-items:center;color:var(--primary);font-weight:900}
.theme-picker{display:grid;grid-template-columns:1fr 1fr;gap:16px}.theme-card{border:2px solid var(--line);border-radius:16px;padding:18px;cursor:pointer;background:var(--panel-2)}.theme-card input{width:auto}.theme-card:has(input:checked){border-color:var(--primary);box-shadow:0 0 0 4px color-mix(in srgb,var(--primary) 12%,transparent)}
.exam-header{position:sticky;top:0;z-index:40;background:var(--bg);border-bottom:1px solid var(--line)}.exam-header-inner{min-height:84px;display:grid;grid-template-columns:1fr auto;gap:18px;align-items:center}.progress-track{height:8px;background:var(--panel-2);border-radius:999px;overflow:hidden;margin-top:7px}.progress-bar{height:100%;background:linear-gradient(90deg,var(--primary),#9a7bff);border-radius:inherit}.timer{font-variant-numeric:tabular-nums;font-size:1.2rem;font-weight:900;padding:10px 14px;border-radius:12px;background:var(--panel);border:1px solid var(--line);min-width:120px;text-align:center}.timer.urgent{font-size:1.65rem;color:var(--danger);animation:pulse 1s infinite}@keyframes pulse{50%{box-shadow:0 0 0 8px color-mix(in srgb,var(--danger) 10%,transparent)}}
.question-card{margin-top:26px}.question-meta{display:flex;gap:10px;align-items:center;flex-wrap:wrap;color:var(--muted);font-weight:700;font-size:.88rem}.question-prompt{font-size:1.22rem;white-space:pre-line;margin:22px 0}.question-instructions{color:var(--warning);font-weight:700}.char-counter{text-align:right;color:var(--muted);font-size:.85rem;margin-top:6px}.option-list{display:grid;gap:12px}.option{display:grid;grid-template-columns:auto 1fr;gap:12px;align-items:start;border:1px solid var(--line);background:var(--panel-2);border-radius:14px;padding:15px;cursor:pointer}.option:hover{border-color:var(--primary)}.option:has(input:checked){border-color:var(--primary);box-shadow:0 0 0 3px color-mix(in srgb,var(--primary) 14%,transparent)}.option input{width:auto;margin:5px 0 0}.option-key{font-weight:900;color:var(--primary)}
.modal-backdrop{position:fixed;inset:0;z-index:100;background:rgba(1,4,10,.76);display:none;place-items:center;padding:20px}.modal-backdrop.open{display:grid}.modal{width:min(520px,100%);background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:25px;box-shadow:var(--shadow)}.modal-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:20px}
.summary-item{padding:18px;border:1px solid var(--line);background:var(--panel-2);border-radius:14px;margin-top:14px}.summary-item .answer{white-space:pre-wrap;margin-top:10px;color:var(--text)}
.kv{display:grid;grid-template-columns:180px 1fr;gap:8px 18px}.kv div:nth-child(odd){color:var(--muted);font-weight:700}.copy-box{display:flex;gap:8px}.copy-box input{margin:0}.code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.88rem}
.score-row{display:grid;grid-template-columns:100px 1fr;gap:14px;align-items:start}.score-row input{margin-top:0}.report-box{border-left:4px solid var(--primary);padding:16px 18px;background:var(--panel-2);border-radius:0 14px 14px 0}.profile-bars{display:grid;gap:12px}.profile-row{display:grid;grid-template-columns:130px 1fr 30px;gap:12px;align-items:center}.profile-bar{height:10px;background:var(--input);border-radius:999px;overflow:hidden}.profile-fill{height:100%;background:linear-gradient(90deg,var(--primary),#9a7bff)}
.footer-note{margin-top:28px;color:var(--muted);font-size:.86rem;text-align:center}
@media(max-width:900px){.grid.cards{grid-template-columns:repeat(2,1fr)}.form-grid.two{grid-template-columns:1fr}.span-2{grid-column:auto}.nav{display:none}}
@media(max-width:600px){.container,.narrow{width:min(100% - 20px,1180px)}main{padding-top:18px}.panel{padding:20px;border-radius:16px}.grid.cards{grid-template-columns:1fr}.theme-picker{grid-template-columns:1fr}.exam-header-inner{grid-template-columns:1fr auto}.timer{min-width:104px}.kv{grid-template-columns:1fr}.kv div:nth-child(odd){margin-top:8px}.modal-actions{flex-direction:column-reverse}.modal-actions .btn{width:100%}}
@media print{.topbar,.actions,.btn,.exam-header{display:none!important}body{background:#fff;color:#000}.panel,.summary-item,.report-box{box-shadow:none;border:1px solid #ccc;background:#fff;color:#000}.muted{color:#555}}