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16px;margin-bottom:16px;line-height:2}.stem{font-size:1.22rem;font-weight:600;line-height:1.85;margin-bottom:18px}.opts{display:grid;gap:10px}.opt{display:flex;align-items:center;gap:14px;width:100%;text-align:start;background:var(--surface);border:1.5px solid var(--line);border-radius:14px;padding:12px 14px;min-height:58px;font-size:1.05rem;transition:border-color .15s,background .15s}.opt:hover{border-color:var(--accent)}.opt .b{flex:none;width:34px;height:34px;border-radius:50%;border:2px solid var(--line);display:grid;place-items:center;font-weight:700;color:var(--muted)}.opt[aria-pressed=true]{border-color:var(--accent);background:var(--accent-soft)}.opt[aria-pressed=true] .b{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}.exam-foot{position:fixed;inset-inline:0;bottom:0;z-index:15;background:var(--surface);border-top:1px solid var(--line);padding:10px 16px calc(10px + env(safe-area-inset-bottom,0px));display:flex;gap:10px}.exam-foot .btn{flex:1}@media 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env(safe-area-inset-bottom,0px));display:grid;gap:14px;max-height:80vh;overflow:auto}.confirm{display:grid;gap:10px;background:var(--sand-soft);border-radius:var(--r);padding:14px}.result-top{display:grid;gap:20px;align-items:center}@media (min-width: 760px){.result-top{grid-template-columns:auto 1fr}}.ring{width:150px;height:150px;border-radius:50%;display:grid;place-items:center;margin-inline:auto;background:conic-gradient(var(--accent) calc(var(--p) * 1%),var(--sunk) 0)}.ring>div{width:120px;height:120px;border-radius:50%;background:var(--surface);display:grid;place-content:center;text-align:center}.ring strong{font-family:var(--display);font-size:2.2rem;line-height:1.1;font-variant-numeric:tabular-nums}.rv{border-inline-start:4px solid var(--good)}.rv.wrong{border-inline-start-color:var(--bad)}.rv .q{font-weight:600;margin-block:6px 8px}.rv .why{margin-top:8px;font-size:.92rem;color:var(--muted)}.toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.toolbar .input{max-width:280px;min-height:42px}.stu-list{display:grid;gap:10px}.stu{display:grid;gap:8px;text-decoration:none;color:inherit}.stu .name{font-weight:600;font-size:1.02rem}.stu .facts{display:flex;gap:6px 14px;flex-wrap:wrap;font-size:.84rem;color:var(--muted)}.flags{display:flex;gap:6px;flex-wrap:wrap}.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:var(--surface)}table{width:100%;border-collapse:collapse;font-size:.92rem;min-width:640px}th,td{padding:10px 14px;text-align:start;border-bottom:1px solid var(--line);vertical-align:middle;font-variant-numeric:tabular-nums}th{font-size:.8rem;color:var(--muted);font-weight:600;background:var(--sunk)}tr:last-child td{border-bottom:0}.kpis{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}@media (min-width: 760px){.kpis{grid-template-columns:repeat(4,1fr)}}.kpi{text-align:start;border:1px solid var(--line);background:var(--surface);border-radius:var(--r);padding:12px 14px;display:grid;gap:2px}.kpi.on{border-color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent)}.kpi .k{font-size:.8rem;color:var(--muted)}.kpi .v{font-family:var(--display);font-size:1.6rem;font-weight:600;font-variant-numeric:tabular-nums}.qedit{display:grid;gap:12px}.opt-edit{display:grid;grid-template-columns:auto 1fr;gap:10px;align-items:center}.opt-edit input[type=radio]{width:22px;height:22px;accent-color:var(--good)}.qrow{display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:start;padding-block:12px;border-bottom:1px solid var(--line)}.qrow:last-child{border:0}.qrow .idx{width:30px;height:30px;border-radius:9px;background:var(--sunk);display:grid;place-items:center;font-size:.85rem;font-weight:600}.two{display:grid;gap:12px}@media (min-width: 640px){.two{grid-template-columns:1fr 1fr}}.prose{max-width:70ch;display:grid;gap:12px}.prose h2{font-size:1.15rem;margin-top:8px}.prose ul{margin:0;padding-inline-start:20px;display:grid;gap:4px}.spinner{width:28px;height:28px;border:3px solid var(--line);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite;margin:40px auto}@keyframes spin{to{transform:rotate(360deg)}}.toast{position:fixed;bottom:calc(80px + env(safe-area-inset-bottom,0px));inset-inline:16px;margin-inline:auto;max-width:420px;z-index:60;background:var(--ink);color:var(--bg);border-radius:12px;padding:12px 16px;text-align:center;font-weight:500}.demo-ribbon{background:var(--sand);color:#1e2a30;text-align:center;font-size:.8rem;font-weight:600;padding:4px 16px}.demo-ribbon button{background:none;border:0;text-decoration:underline;font-weight:700;color:inherit;padding:0 4px}@media (prefers-reduced-motion: reduce){*{transition:none!important;animation:none!important}}@media (min-width: 900px){.mobile-only{display:none!important}}.practice{display:grid;gap:14px;background:linear-gradient(135deg,var(--accent-soft),var(--surface) 70%);border-color:color-mix(in srgb,var(--accent) 30%,var(--line))}.price-grid{display:grid;gap:12px}@media (min-width: 760px){.price-grid{grid-template-columns:repeat(3,1fr)}}.price{display:grid;gap:10px;align-content:start}.price.featured{border-color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent)}.price .amt{font-family:var(--display);font-size:1.9rem;font-weight:700;font-variant-numeric:tabular-nums}.price-amt{position:relative;display:inline-flex;align-items:baseline;gap:6px;background:none;border:0;padding:2px 0;font:inherit;color:inherit;cursor:help}.fx-tip{position:absolute;bottom:calc(100% + 8px);inset-inline-start:0;white-space:nowrap;background:var(--ink);color:var(--bg);font-family:var(--body);font-size:.88rem;font-weight:600;padding:6px 12px;border-radius:10px;opacity:0;transform:translateY(4px);pointer-events:none;transition:.15s;box-shadow:var(--shadow)}.price-amt:hover .fx-tip,.price-amt:focus-visible .fx-tip,.price-amt.open .fx-tip{opacity:1;transform:none}.price ul{margin:0;padding-inline-start:18px;color:var(--muted);font-size:.92rem;display:grid;gap:4px}.faq details{border-bottom:1px solid var(--line);padding-block:12px}.faq details:last-child{border:0}.faq summary{cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:12px}.faq summary:after{content:"+";color:var(--accent);font-weight:700}.faq details[open] summary:after{content:"−"}.faq details p{color:var(--muted);margin-top:8px}.why{display:grid;gap:12px}@media (min-width: 760px){.why{grid-template-columns:repeat(2,1fr)}}.why .card h3{font-size:1.02rem;margin-bottom:4px}.why .card p{color:var(--muted);font-size:.92rem}.course-grid{display:grid;gap:12px}@media (min-width: 760px){.course-grid{grid-template-columns:repeat(2,1fr)}}.player{position:relative;aspect-ratio:16 / 9;max-width:100%;background:#0e1518;border-radius:var(--r);overflow:hidden;display:grid;place-items:center;color:#e4ebea;text-align:center}.player iframe{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;border:0}.player .wm{position:absolute;inset-inline-end:12px;top:10px;font-size:.78rem;opacity:.55;pointer-events:none;z-index:2;color:#fff;text-shadow:0 1px 2px #000}.course-layout{display:grid;gap:16px}@media (min-width: 900px){.course-layout{grid-template-columns:1fr 340px;align-items:start}}.lesson{display:flex;gap:12px;align-items:center;width:100%;text-align:start;background:none;border:0;border-bottom:1px solid var(--line);padding:12px 4px;color:inherit}.lesson:last-child{border-bottom:0}.lesson.on{background:var(--accent-soft);border-radius:10px}.lesson .dot{flex:none;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;font-size:.82rem;font-weight:700;background:var(--sunk);color:var(--muted)}.lesson .dot.done{background:var(--good);color:var(--surface)}.lesson .dot svg{width:15px;height:15px}.lesson[disabled]{opacity:.6;cursor:default}.tg-band{display:flex;align-items:center;gap:14px;padding:16px 18px;border-radius:var(--r);text-decoration:none;color:inherit;background:linear-gradient(135deg,color-mix(in srgb,#229ED9 14%,var(--surface)),var(--surface));border:1px solid color-mix(in srgb,#229ED9 35%,var(--line))}.tg-band strong{display:block;font-family:var(--display)}.tg-band .small{color:var(--muted)}.tg-band .btn{background:#229ed9;color:#fff}.tg-ic{flex:none;width:46px;height:46px;border-radius:14px;background:#229ed9;color:#fff;display:grid;place-items:center}.tg-ic svg{width:24px;height:24px}.sheet-grid{overflow:auto;max-height:70vh;border:1px solid var(--line);border-radius:12px;background:var(--surface)}.sheet-grid table{min-width:0;border-collapse:separate;border-spacing:0;font-size:.92rem}.sheet-grid th{position:sticky;top:0;z-index:2;background:var(--sunk);border-bottom:1px solid var(--line);border-inline-start:1px solid var(--line);padding:8px 10px;white-space:nowrap;font-size:.82rem}.sheet-grid td{padding:0;border-bottom:1px solid var(--line);border-inline-start:1px solid var(--line);vertical-align:top;background:var(--surface)}.sheet-grid .rn{width:38px;min-width:38px;text-align:center;color:var(--muted);font-size:.8rem;padding:8px 4px;background:var(--sunk);position:sticky;inset-inline-start:0;z-index:1}.sheet-grid th.rn{z-index:3}.sheet-grid td:last-child.rn{position:static;background:var(--surface)}.sheet-grid textarea,.sheet-grid select{display:block;width:100%;min-height:40px;border:0;background:transparent;padding:8px 10px;resize:vertical;line-height:1.6;outline:none;field-sizing:content;max-height:200px}.sheet-grid select{padding-inline:6px;cursor:pointer}.sheet-grid textarea:focus,.sheet-grid select:focus{box-shadow:inset 0 0 0 2px var(--accent);background:color-mix(in srgb,var(--accent-soft) 40%,var(--surface))}.sheet-grid textarea.is-correct{background:var(--good-soft);color:var(--good);font-weight:700}.sheet-grid .ok-col select{font-weight:700;color:var(--good);text-align:center}.sheet-grid tr.dirty .rn:first-child{box-shadow:inset -3px 0 0 var(--sand)}.sheet-grid tr.bad td{background:var(--bad-soft)}.sheet-grid tr.bad .rn:first-child{color:var(--bad);font-weight:700}.sheet-grid .x{border:0;background:none;color:var(--muted);font-size:1.2rem;line-height:1;padding:6px;border-radius:8px}.sheet-grid .x:hover{color:var(--bad);background:var(--bad-soft)}.save-bar{position:sticky;bottom:calc(66px + env(safe-area-inset-bottom,0px));z-index:5;display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;padding:10px 14px;border-radius:12px;background:color-mix(in srgb,var(--surface) 92%,transparent);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border:1px solid var(--line);box-shadow:var(--shadow)}@media (min-width: 760px){.save-bar{bottom:12px}}.link-box{background:var(--sunk);padding:14px;border-radius:12px;gap:10px}.teacher{display:grid;gap:24px;align-items:center}@media (min-width: 760px){.teacher{grid-template-columns:300px 1fr;gap:40px}}.teacher-photo{position:relative;isolation:isolate;justify-self:center;width:min(300px,68vw)}.teacher-photo img{display:block;width:100%;height:auto;aspect-ratio:248 / 387;object-fit:cover;object-position:top;border-radius:28px 28px 120px;box-shadow:0 20px 40px -18px #0c283073;background:var(--sunk)}.teacher-photo:before{content:"";position:absolute;top:18px;right:-14px;bottom:-14px;left:18px;z-index:-1;border-radius:28px 28px 120px;background:linear-gradient(135deg,var(--sand),var(--accent));opacity:.9}.teacher-badge{position:absolute;inset-inline-start:-10px;bottom:26px;display:flex;align-items:center;gap:10px;padding:10px 14px;border-radius:16px;background:var(--surface);box-shadow:var(--shadow);border:1px solid var(--line);max-width:210px;font-size:.82rem;font-weight:700;line-height:1.4}.teacher-badge strong{font-family:var(--display);font-size:1.9rem;font-weight:800;color:var(--sand);line-height:1}.teacher-name{font-size:clamp(1.7rem,5vw,2.3rem);font-weight:800}.teacher blockquote{margin:0;padding-inline-start:14px;border-inline-start:4px solid var(--sand);font-family:var(--display);font-size:1.15rem;font-weight:600}.teacher-points{margin:0;padding:0;list-style:none;display:grid;gap:8px}.teacher-points li{position:relative;padding-inline-start:28px;color:var(--muted)}.teacher-points li strong{color:var(--ink)}.teacher-points li:before{content:"✓";position:absolute;inset-inline-start:0;top:1px;width:20px;height:20px;border-radius:50%;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;font-size:.75rem;font-weight:800}.mode-pick{display:grid;grid-template-columns:1fr 1fr;gap:10px}.mode-card{position:relative;display:grid;justify-items:center;gap:4px;padding:16px 10px;text-align:center;border:1.5px solid var(--line);border-radius:14px;background:var(--surface);cursor:pointer;transition:border-color .15s,background .15s}.mode-card:hover{border-color:var(--accent)}.mode-card input{position:absolute;opacity:0;pointer-events:none}.mode-card:has(input:focus-visible){outline:3px solid var(--sand);outline-offset:2px}.mode-card.on{border-color:var(--accent);background:var(--accent-soft);box-shadow:inset 0 0 0 1px var(--accent)}.mode-card strong{font-family:var(--display);font-size:1.1rem}.mode-ic{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:var(--sunk);color:var(--muted)}.mode-ic svg{width:26px;height:26px}.mode-card.on .mode-ic{background:var(--accent);color:var(--accent-ink)}.color-btn{display:inline-flex;align-items:center;gap:6px;height:36px;padding:0 8px;border-radius:10px;border:1px solid var(--line);background:var(--surface);color:var(--muted)}.color-btn .dot{width:16px;height:16px;border-radius:50%;border:1px solid var(--line)}.color-pop{position:fixed;z-index:60;display:grid;gap:12px;padding:14px;border-radius:16px;background:var(--surface);border:1px solid var(--line);box-shadow:0 16px 40px -12px #0000004d}.swatches{display:grid;grid-template-columns:repeat(6,1fr);gap:8px}.sw{aspect-ratio:1;border-radius:10px;border:1px solid rgba(0,0,0,.15);cursor:pointer;padding:0}.sw.on{outline:3px solid var(--accent);outline-offset:2px}.custom-color{display:inline-flex;align-items:center;gap:8px;cursor:pointer}.custom-color input{width:36px;height:36px;padding:0;border:1px solid var(--line);border-radius:10px;background:none;cursor:pointer}.qbox{transition:background .2s,color .2s}.sheet-grid .color-cell{padding:6px;text-align:center}.analysis-head{display:flex;gap:16px;align-items:center;flex-wrap:wrap}.analysis-head p{flex:1;min-width:200px}.level-badge{display:grid;justify-items:center;gap:0;min-width:110px;padding:12px 16px;border-radius:16px;text-align:center}.level-badge .num{font-family:var(--display);font-size:2rem;font-weight:800;line-height:1.1}.level-badge.good{background:var(--good-soft);color:var(--good)}.level-badge.warn{background:var(--warn-soft);color:var(--warn)}.level-badge.bad{background:var(--bad-soft);color:var(--bad)}.analysis-points{margin:0;padding-inline-start:20px;display:grid;gap:6px}.recs{background:var(--sand-soft);border-radius:14px;padding:14px 16px;display:grid;gap:6px}.recs ol{margin:0;padding-inline-start:22px;display:grid;gap:6px}.backlink{display:inline-flex;align-items:center;gap:6px;align-self:flex-start;justify-self:start;width:fit-content;min-height:40px;padding:6px 14px 6px 12px;border-radius:99px;background:var(--surface, #fff);border:1px solid var(--line);color:var(--ink);font-weight:600;font-size:.92rem;text-decoration:none}.backlink:hover{border-color:var(--accent);color:var(--accent)}.backlink .ic{width:18px;height:18px;display:inline-flex}.backlink .ic svg{width:100%;height:100%}.topnav-out{margin-inline-start:8px;padding:6px 12px;border-radius:10px;border:1px solid var(--line);background:transparent;color:var(--muted);font:inherit;font-weight:500;cursor:pointer}.topnav-out:hover{color:var(--bad);border-color:var(--bad)}.protect{position:relative;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}.protect img{-webkit-user-drag:none;pointer-events:none}.protect .watermark{position:absolute;top:0;right:0;bottom:0;left:0;overflow:hidden;pointer-events:none;z-index:5;display:flex;flex-wrap:wrap;align-content:space-around;justify-content:space-around;gap:40px 24px;padding:20px}.protect .watermark span{transform:rotate(-24deg);font-size:.78rem;font-weight:600;color:var(--ink);opacity:.07;white-space:nowrap}.protect.is-hidden>:not(.protect-cover):not(.watermark){filter:blur(14px)}.protect-cover{position:absolute;top:0;right:0;bottom:0;left:0;z-index:6;display:grid;place-items:center;text-align:center;padding:24px;font:inherit;font-weight:700;color:var(--ink);background:transparent;border:0;cursor:pointer;width:100%}@media print{.protect{display:none!important}}.forgot-link{justify-self:center;text-align:center;padding:8px 12px;font-weight:600}.phone-row{display:flex;gap:8px}.phone-row .cc{flex:0 0 auto;width:9.5rem;padding-inline:8px;font-size:.92rem}.phone-row .grow{flex:1;min-width:0}.seg.sm{padding:3px}.seg.sm button{padding:4px 10px;font-size:.82rem}