:root {
  --bg: #f6f7fb; --panel: #ffffff; --ink: #1d2433; --muted: #5d6679; --line: #e3e6ef;
  --brand: #4f46e5; --brand-ink: #ffffff; --brand-soft: #eef0ff;
  --ok: #15803d; --ok-soft: #e7f6ec; --bad: #b42318; --bad-soft: #fdecea; --warn: #b45309;
  --lv1: #16a34a; --lv2: #2563eb; --lv3: #9333ea; --lv4: #dc2626;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 4px 16px rgba(16, 24, 40, .06);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1320; --panel: #171c2c; --ink: #e8ebf4; --muted: #9aa3b8; --line: #2a3147;
    --brand: #818cf8; --brand-ink: #0f1320; --brand-soft: #232a48;
    --ok: #4ade80; --ok-soft: #13301f; --bad: #f87171; --bad-soft: #3a1717; --warn: #fbbf24;
    --lv1: #4ade80; --lv2: #60a5fa; --lv3: #c084fc; --lv4: #f87171;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4);
  }
}
:root[data-theme="dark"] {
  --bg: #0f1320; --panel: #171c2c; --ink: #e8ebf4; --muted: #9aa3b8; --line: #2a3147;
  --brand: #818cf8; --brand-ink: #0f1320; --brand-soft: #232a48;
  --ok: #4ade80; --ok-soft: #13301f; --bad: #f87171; --bad-soft: #3a1717; --warn: #fbbf24;
  --lv1: #4ade80; --lv2: #60a5fa; --lv3: #c084fc; --lv4: #f87171;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.55 Nunito, system-ui, -apple-system, Segoe UI, Roboto, sans-serif; }
a { color: var(--brand); }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5em; }
h1 { font-size: clamp(1.5rem, 4vw, 2.2rem); font-weight: 800; }
h2 { font-size: 1.3rem; }
h3 { font-size: 1.05rem; margin-top: 1.3em; }
sup { font-size: .7em; line-height: 0; }
.muted { color: var(--muted); } .small { font-size: .88rem; } .center { text-align: center; }

.topbar { position: sticky; top: 0; z-index: 5; display: flex; justify-content: space-between; align-items: center; padding: 10px 16px; background: var(--panel); border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.1rem; color: var(--ink); text-decoration: none; }
.brand small { color: var(--muted); font-weight: 600; }
.logo { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 9px; background: var(--brand); color: var(--brand-ink); }
main { max-width: 1100px; margin: 0 auto; padding: 20px 16px 40px; }
.foot { text-align: center; color: var(--muted); font-size: .85rem; padding: 20px 16px 30px; }

button, .primary, .ghost, .danger { font: inherit; font-weight: 700; border-radius: 10px; padding: 9px 16px; border: 1px solid transparent; cursor: pointer; text-decoration: none; display: inline-block; }
.primary { background: var(--brand); color: var(--brand-ink); }
.primary:disabled { opacity: .45; cursor: not-allowed; }
.ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.danger { background: var(--bad-soft); color: var(--bad); }
.big { padding: 13px 22px; font-size: 1.05rem; }
.btns { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 14px; }

.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 16px; padding: 22px; box-shadow: var(--shadow); margin-bottom: 18px; }
.eyebrow { color: var(--muted); font-weight: 700; margin: 0 0 6px; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.lead { font-size: 1.07rem; }

.hero { display: grid; grid-template-columns: 1.4fr 1fr; gap: 22px; align-items: center; background: var(--panel); border: 1px solid var(--line); border-radius: 20px; padding: 26px; box-shadow: var(--shadow); }
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.stat { background: var(--brand-soft); border-radius: 12px; padding: 12px; }
.stat b { display: block; font-size: 1.5rem; font-weight: 800; }
.stat span { color: var(--muted); font-size: .85rem; }
.bar { grid-column: 1 / -1; height: 10px; border-radius: 99px; background: var(--line); overflow: hidden; }
.bar i { display: block; height: 100%; background: var(--brand); }

.legend { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 4px; }
.chip { font-size: .8rem; font-weight: 700; padding: 3px 10px; border-radius: 99px; border: 1.5px solid currentColor; }
.lv1, .lv1-t { color: var(--lv1); } .lv2, .lv2-t { color: var(--lv2); } .lv3, .lv3-t { color: var(--lv3); } .lv4, .lv4-t { color: var(--lv4); }

.phase h2 { margin-top: 28px; display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.phase h2 small { color: var(--muted); font-size: .85rem; font-weight: 600; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 10px; }
.card { position: relative; display: flex; flex-direction: column; gap: 4px; min-height: 96px; padding: 12px; border-radius: 12px; background: var(--panel); border: 1px solid var(--line); border-top: 4px solid currentColor; text-decoration: none; transition: transform .12s; }
.card:hover { transform: translateY(-2px); }
.card .dn { font-size: .8rem; font-weight: 800; }
.card .tt { color: var(--ink); font-weight: 700; font-size: .93rem; line-height: 1.3; }
.card em { font-style: normal; font-weight: 800; font-size: .85rem; margin-top: auto; }
.card .ok { color: var(--ok); } .card .warn { color: var(--warn); }
.card.review { background: var(--brand-soft); }
.card.current { box-shadow: 0 0 0 3px var(--brand); }
.card.locked { color: var(--muted); border-top-color: var(--line); opacity: .65; }
.card.locked .tt { color: var(--muted); }

.crumbs { display: flex; gap: 16px; margin-bottom: 12px; font-weight: 700; }
.crumbs a { text-decoration: none; }
.keys li { margin: 6px 0; }
.example { background: var(--brand-soft); border-left: 4px solid var(--brand); border-radius: 10px; padding: 12px 16px; margin-top: 16px; }
.example p { margin: 6px 0 0; }
.resources { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 10px; }
.res { display: flex; align-items: center; gap: 10px; padding: 10px 14px; border: 1px solid var(--line); border-radius: 10px; text-decoration: none; color: var(--ink); font-weight: 700; }
.res span { display: grid; place-items: center; width: 30px; height: 30px; border-radius: 8px; background: var(--brand-soft); color: var(--brand); font-weight: 800; }
.res:hover { border-color: var(--brand); }
.cta { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.cta h3 { margin: 0; }

.testhead { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; position: sticky; top: 56px; z-index: 4; }
.testhead h1 { margin: 0; font-size: 1.4rem; }
.prog { font-size: 1.1rem; background: var(--brand-soft); padding: 8px 14px; border-radius: 10px; }
.qs { list-style: none; padding: 0; margin: 0; counter-reset: q; }
.q { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 18px; margin-bottom: 14px; counter-increment: q; }
.q.right { border-color: var(--ok); } .q.wrong { border-color: var(--bad); }
.qt { font-weight: 700; font-size: 1.07rem; margin-bottom: 12px; }
.qt::before { content: "Q" counter(q) ". "; color: var(--brand); font-weight: 800; }
.opts { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.opt { display: flex; align-items: center; gap: 10px; text-align: left; background: var(--bg); color: var(--ink); border: 1.5px solid var(--line); font-weight: 600; }
.opt span { flex: none; display: grid; place-items: center; width: 26px; height: 26px; border-radius: 7px; background: var(--panel); border: 1px solid var(--line); font-size: .8rem; font-weight: 800; }
.opt:hover:not(:disabled) { border-color: var(--brand); }
.opt.sel { border-color: var(--brand); background: var(--brand-soft); }
.opt.sel span { background: var(--brand); color: var(--brand-ink); }
.opt.correct { border-color: var(--ok); background: var(--ok-soft); }
.opt.chosen-wrong { border-color: var(--bad); background: var(--bad-soft); }
.opt:disabled { cursor: default; }
.explain { margin-top: 12px; padding: 10px 14px; border-radius: 10px; background: var(--bg); font-size: .95rem; }

.result { display: flex; gap: 22px; align-items: center; flex-wrap: wrap; }
.result.pass { border-color: var(--ok); } .result.fail { border-color: var(--warn); }
.result h2 { margin: 0 0 4px; } .result p { margin: 4px 0; }
.ring { --c: var(--ok); width: 110px; height: 110px; border-radius: 50%; display: grid; place-items: center; background: conic-gradient(var(--c) calc(var(--p) * 1%), var(--line) 0); flex: none; }
.fail .ring { --c: var(--warn); }
.ring b { display: grid; place-items: center; width: 84px; height: 84px; border-radius: 50%; background: var(--panel); font-size: 1.4rem; font-weight: 800; }

dialog { border: 1px solid var(--line); border-radius: 16px; background: var(--panel); color: var(--ink); padding: 22px; width: min(420px, calc(100vw - 32px)); }
dialog::backdrop { background: rgba(0, 0, 0, .45); }
dialog label { display: block; margin: 12px 0; font-weight: 700; }
dialog label.row { display: flex; gap: 8px; align-items: center; }
dialog input:not([type]) { display: block; width: 100%; margin-top: 6px; padding: 9px 12px; font: inherit; border-radius: 10px; border: 1px solid var(--line); background: var(--bg); color: var(--ink); }
dialog .btns { justify-content: space-between; }

@media (max-width: 760px) {
  .hero { grid-template-columns: 1fr; padding: 18px; }
  .opts { grid-template-columns: 1fr; }
  .panel { padding: 16px; }
  .testhead { top: 54px; }
  .brand small { display: none; }
}

/* ---------- Accounts, two-test days, reviews, admin ---------- */
.userbar { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; justify-content: flex-end; }
.userbar .ghost { padding: 7px 12px; font-size: .9rem; }
.logo.admin { background: var(--lv4); }
main.wide { max-width: 1300px; }
.sect { margin-top: 26px; display: flex; gap: 10px; align-items: baseline; flex-wrap: wrap; }
.sect small { font-size: .85rem; font-weight: 600; }
.tests { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.tcard { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin: 0; }
.tcard h3 { margin: 0; display: flex; gap: 8px; align-items: center; }
.tcard p { margin: 4px 0 0; }
.tcard.ok { border-color: var(--ok); }
.tests + .panel { margin-top: 14px; }

.ring.low { --c: var(--warn); }
.ring.empty b { color: var(--muted); }
.ring.sm { width: 84px; height: 84px; } .ring.sm b { width: 64px; height: 64px; font-size: 1.1rem; }
.review-sum { display: flex; justify-content: space-between; gap: 20px; align-items: center; flex-wrap: wrap; }
.review-sum h2 { margin: 0 0 6px; } .review-sum p { margin: 4px 0; }
.rings { display: flex; gap: 18px; }
.rcol { display: flex; flex-direction: column; align-items: center; gap: 6px; font-weight: 700; }
.ring.empty { background: var(--line); }
.treview h3 { margin: 22px 0 10px; }
.onlywrong { display: inline-flex; gap: 8px; align-items: center; font-weight: 700; margin: 4px 0 6px; cursor: pointer; }
.only-wrong .q.right { display: none; }
.ans { display: flex; gap: 10px; flex-wrap: wrap; }
.tag-ok, .tag-bad { display: inline-block; padding: 3px 10px; border-radius: 8px; font-weight: 700; font-size: .92rem; }
.tag-ok { background: var(--ok-soft); color: var(--ok); }
.tag-bad { background: var(--bad-soft); color: var(--bad); }
.datepick { margin: 0 0 14px; }

.auth { max-width: 520px; margin: 20px auto; }
.tabs { display: flex; gap: 6px; margin-bottom: 18px; background: var(--bg); padding: 4px; border-radius: 12px; }
.tabs a { flex: 1; text-align: center; padding: 8px; border-radius: 9px; font-weight: 800; text-decoration: none; color: var(--muted); }
.tabs a.on { background: var(--panel); color: var(--ink); box-shadow: var(--shadow); }
.form label { display: block; margin: 10px 0; font-weight: 700; }
.form label.row { display: flex; gap: 8px; align-items: center; }
.form input:not([type=checkbox]), .form select, .form textarea, .toolbar input, .toolbar select { display: block; width: 100%; margin-top: 5px; padding: 10px 12px; font: inherit; border-radius: 10px; border: 1px solid var(--line); background: var(--bg); color: var(--ink); }
.form .two { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form .two label { margin: 4px 0; }
.err { color: var(--bad); font-weight: 700; min-height: 1em; }
.btns.end { justify-content: flex-end; }
label.row { display: inline-flex; gap: 8px; align-items: center; font-weight: 700; }

dl.info { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 10px 20px; margin: 10px 0; }
dl.info dt { color: var(--muted); font-size: .82rem; font-weight: 700; }
dl.info dd { margin: 0; font-weight: 700; word-break: break-word; }
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 10px; margin: 12px 0 18px; }
.toolbar { display: grid; grid-template-columns: 2fr 1fr 1fr 1.3fr auto auto; gap: 10px; margin-bottom: 14px; align-items: end; }
.toolbar input, .toolbar select { margin: 0; }
.tablewrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .93rem; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { color: var(--muted); font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; white-space: nowrap; }
table.click tbody tr { cursor: pointer; }
table.click tbody tr:hover { background: var(--brand-soft); }
.mini { width: 70px; height: 6px; border-radius: 9px; background: var(--line); overflow: hidden; margin-bottom: 3px; }
.mini i { display: block; height: 100%; background: var(--brand); }
.heat { display: grid; grid-template-columns: repeat(15, 1fr); gap: 4px; }
.heat i, i.key { display: grid; place-items: center; aspect-ratio: 1; border-radius: 6px; background: var(--line); color: var(--muted); font-style: normal; font-size: .75rem; font-weight: 800; }
.heat i.g, i.key.g { background: var(--ok); color: #fff; } .heat i.y, i.key.y { background: var(--warn); color: #fff; }
i.key { display: inline-block; width: 12px; height: 12px; vertical-align: middle; margin: 0 4px 0 10px; }
code { background: var(--bg); padding: 1px 6px; border-radius: 6px; }

@media (max-width: 760px) {
  .tests, .form .two { grid-template-columns: 1fr; }
  .toolbar { grid-template-columns: 1fr 1fr; }
  .toolbar input { grid-column: 1 / -1; }
  .heat { grid-template-columns: repeat(10, 1fr); }
  .userbar .ghost { padding: 6px 9px; font-size: .82rem; }
}

.form textarea { font-family: ui-monospace, Menlo, monospace; font-size: .9rem; resize: vertical; }
.toolbar .primary { white-space: nowrap; text-align: center; }