.pt{--pt-ink: #0f172a;--pt-soft: #475569;--pt-mute: #64748b;--pt-line: #e2e8f0;--pt-card: #fff;--pt-sub: #f8fafc;--pt-brand: #276651;--pt-brand2: #5fa886;--pt-brandbg: #eef6f2;--pt-amber: #f59e0b}.dark .pt{--pt-ink: #f1f5f9;--pt-soft: #cbd5e1;--pt-mute: #94a3b8;--pt-line: #334155;--pt-card: #1e293b;--pt-sub: #0f172a;--pt-brand: #5fa886;--pt-brand2: #3f8a68;--pt-brandbg: rgba(95,168,134,.15)}.pt{color:var(--pt-ink)}.pt .mono{font-family:JetBrains Mono Variable,ui-monospace,monospace;font-variant-numeric:tabular-nums}.pt-label{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--pt-soft);font-weight:600}.pt-muted{color:var(--pt-soft);font-size:14px}.pt-small{font-size:12px;color:var(--pt-mute);margin:8px 0 0}.pt-bar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:14px}.pt-spacer{flex:1}.pt-pill{border:1px solid #cbd5e1;background:var(--pt-card);color:var(--pt-ink);border-radius:999px;padding:0 16px;min-height:44px;font-size:15px;font-weight:500}.pt-pill[aria-pressed=true]{background:var(--pt-ink);color:var(--pt-card);border-color:var(--pt-ink)}.pt-chip{border:1px solid #cbd5e1;background:var(--pt-card);color:var(--pt-ink);border-radius:8px;padding:0 12px;min-height:44px;font-size:14px;display:inline-flex;gap:8px;align-items:center}.pt-chip[aria-pressed=true]{border-color:var(--pt-brand);background:var(--pt-brandbg);color:var(--pt-brand);font-weight:600}.pt-chip--review{border-style:dashed}.pt-chip--review:disabled{opacity:.5}.pt-dot{width:8px;height:8px;border-radius:50%;background:currentColor;opacity:.6}.dark .pt-pill,.dark .pt-chip{border-color:#475569}.pt-timer-toggle{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--pt-soft);min-height:44px}.pt-timer-toggle input{width:18px;height:18px;accent-color:var(--pt-brand)}.pt-timer{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--pt-soft)}.pt-timer[hidden]{display:none}.pt-timer-bg{fill:none;stroke:var(--pt-line);stroke-width:4}.pt-timer-fg{fill:none;stroke:var(--pt-brand);stroke-width:4;stroke-linecap:round;transition:stroke-dashoffset 1s linear,stroke .3s}.pt-timer.is-low .pt-timer-fg{stroke:#ef4444}.pt-lesson{background:var(--pt-card);border:1px solid var(--pt-line);border-left:4px solid var(--pt-brand);border-radius:10px;padding:14px 18px;margin:4px 0 18px}.pt-lesson h2{font-size:18px;margin:0 0 6px;font-weight:700}.pt-lesson p{margin:0 0 6px;color:var(--pt-soft);font-size:15px;line-height:1.55}.pt-lesson-links a{color:var(--pt-brand);text-decoration:underline;text-underline-offset:2px}.pt-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:20px;align-items:start}.pt-grid>*{min-width:0}.pt-card{background:var(--pt-card);border:1px solid var(--pt-line);border-radius:14px;box-shadow:0 1px #0f172a08,0 8px 24px -12px #0f172a1f}.pt-q{padding:24px 26px 22px}.pt-qhead{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}.pt-progress{display:flex;gap:4px;flex-wrap:wrap}.pt-progress i{width:14px;height:6px;border-radius:3px;background:var(--pt-line);display:block}.pt-progress i.ok{background:var(--pt-brand2)}.pt-progress i.bad{background:#f87171}.pt-progress i.now{background:var(--pt-ink)}.pt-big{font-size:clamp(30px,6vw,56px);font-weight:700;letter-spacing:-.02em;margin:14px 0 2px;overflow-wrap:anywhere;line-height:1.1}.pt-big .pfx{color:var(--pt-brand)}.pt-ask{color:var(--pt-soft);font-size:17px;margin:6px 0 16px}.pt-bits{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:30px 0 4px}.pt-oct{display:grid;grid-template-columns:repeat(8,1fr);gap:3px;padding:6px;border-radius:10px;background:var(--pt-sub);border:1px solid var(--pt-line);position:relative}.pt-oct.hot{background:#fffbeb;border-color:var(--pt-amber);box-shadow:0 0 0 3px #f59e0b26}.dark .pt-oct.hot{background:#f59e0b1a}.pt-b{height:34px;border-radius:5px;display:grid;place-items:center;font:600 15px JetBrains Mono Variable,monospace;color:var(--pt-soft);background:var(--pt-card);border:1px solid var(--pt-line);animation:pt-flip .45s both}.pt-b.n{background:var(--pt-brand);color:#fff;border-color:var(--pt-brand)}.pt-cut{position:absolute;top:-10px;bottom:-6px;width:3px;background:var(--pt-amber);border-radius:2px}.pt-cut span{position:absolute;top:-22px;left:50%;transform:translate(-50%);background:var(--pt-amber);color:#1c1917;font:700 12px JetBrains Mono Variable,monospace;padding:2px 6px;border-radius:4px;white-space:nowrap}.pt-octlab{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;font-size:12px;color:var(--pt-mute);text-align:center}.pt-nl{margin:22px 0 6px}.pt-pinrow{position:relative;height:34px}.pt-pin{position:absolute;top:0;transform:translate(-50%);text-align:center;animation:pt-drop .55s cubic-bezier(.2,1.4,.4,1) both}.pt-pin b{display:inline-block;background:var(--pt-ink);color:var(--pt-card);font:700 13px JetBrains Mono Variable,monospace;padding:3px 8px;border-radius:6px}.pt-pin:after{content:"";display:block;width:2px;height:12px;background:var(--pt-ink);margin:0 auto}.pt-track{display:grid;height:46px;border-radius:10px;overflow:hidden;border:1px solid var(--pt-line)}.pt-seg{border-right:1px dashed #cbd5e1;display:grid;place-items:center;font:500 12px JetBrains Mono Variable,monospace;color:var(--pt-mute);background:var(--pt-card);overflow:hidden;white-space:nowrap}.pt-seg:last-child{border-right:0}.pt-seg.hit{background:linear-gradient(180deg,#d1fae5,#a7f3d0);color:#065f46;font-weight:700;animation:pt-glow 1s .3s both}.pt-nlcap{font-size:13px;color:var(--pt-soft);margin-top:6px}.pt-answers{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:10px}.pt-ans{border:1.5px solid var(--pt-line);border-radius:10px;padding:10px 12px;position:relative;display:block}.pt-ans label{display:block;font-size:12px;color:var(--pt-soft);margin-bottom:4px}.pt-ans input{width:100%;border:0;background:transparent;font:600 20px JetBrains Mono Variable,monospace;color:var(--pt-ink);padding:2px 0;outline:none}.pt-ans:focus-within{border-color:var(--pt-brand);box-shadow:0 0 0 3px #27665126}.pt-ans.ok{border-color:#34d399;background:#ecfdf5}.pt-ans.bad{border-color:#f87171;background:#fef2f2}.dark .pt-ans.ok{background:#10b9811f}.dark .pt-ans.bad{background:#ef44441f}.pt-ans.bad input{text-decoration:line-through;text-decoration-color:#b91c1c;text-decoration-thickness:2px;color:#b91c1c}.pt-tag{position:absolute;top:10px;right:10px;width:22px;height:22px;border-radius:50%;display:grid;place-items:center;color:#fff;font-size:13px;font-weight:700;animation:pt-pop .35s both}.pt-ans.ok .pt-tag{background:#10b981}.pt-ans.bad .pt-tag{background:#ef4444}.pt-fix{font:600 14px JetBrains Mono Variable,monospace;color:#065f46;margin-top:2px;overflow-wrap:anywhere}.dark .pt-fix{color:#6ee7b7}.pt-choices{grid-column:1 / -1;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.pt-choice{border:1.5px solid var(--pt-line);border-radius:10px;padding:12px 14px;min-height:52px;font:600 18px JetBrains Mono Variable,monospace;background:var(--pt-card);color:var(--pt-ink);text-align:left}.pt-choice[aria-pressed=true]{border-color:var(--pt-brand);box-shadow:0 0 0 3px #27665126}.pt-choice.ok{border-color:#34d399;background:#ecfdf5;color:#065f46}.pt-choice.bad{border-color:#f87171;background:#fef2f2;color:#991b1b;text-decoration:line-through}.dark .pt-choice.ok{background:#10b9811f;color:#6ee7b7}.dark .pt-choice.bad{background:#ef44441f;color:#fca5a5}.pt-feedback:empty{display:none}.pt-feedback{display:inline-block;margin:6px 0 4px;border-radius:12px;padding:10px 14px;font-size:15px;transform:rotate(-1deg);animation:pt-pop .35s both}.pt-feedback.good{background:#ecfdf5;color:#065f46;border:1px solid #a7f3d0}.pt-feedback.close{background:#fff7ed;color:#9a3412;border:1px solid #fed7aa}.pt-feedback.miss{background:#fef2f2;color:#991b1b;border:1px solid #fecaca}.pt-actions{display:flex;gap:10px;margin-top:18px;flex-wrap:wrap}.pt-btn{border:0;border-radius:10px;padding:0 18px;min-height:46px;font-weight:600;font-size:15px;cursor:pointer;display:inline-flex;align-items:center;text-decoration:none}.pt-btn[hidden]{display:none}.pt-btn--primary{background:var(--pt-ink);color:var(--pt-card)}.pt-btn--ghost{background:var(--pt-card);border:1px solid #cbd5e1;color:var(--pt-ink)}.pt-link{background:none;border:0;color:var(--pt-soft);font-size:12px;text-decoration:underline;padding:6px 0;cursor:pointer}.pt-sol,.pt-summary{margin-top:20px;padding:22px 26px}.pt-sol h3,.pt-summary h3{margin:0 0 14px;font-size:18px;font-weight:700}.pt-steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:12px}.pt-step{border-radius:12px;padding:14px;background:var(--pt-sub);border:1px solid var(--pt-line);animation:pt-rise .45s both}.pt-step .n{width:26px;height:26px;border-radius:50%;background:var(--pt-brand);color:#fff;display:grid;place-items:center;font-weight:700;font-size:13px;margin-bottom:8px}.pt-step p{margin:0 0 6px;font-size:13.5px;color:var(--pt-soft)}.pt-step .m{font:700 16px JetBrains Mono Variable,monospace;overflow-wrap:anywhere}.pt-step .m em{font-style:normal;color:var(--pt-brand)}.pt-and{margin-top:16px;font:500 14px/1.7 JetBrains Mono Variable,monospace;background:#0f172a;color:#cbd5e1;border-radius:12px;padding:14px 18px;overflow-x:auto;white-space:pre}.pt-and .g{color:#6ee7b7}.pt-and .y{color:#fcd34d}.pt-and .d{color:#64748b}.pt-table{width:100%;border-collapse:collapse;margin-top:14px;font-size:14px}.pt-table th{text-align:left;font-weight:600;color:var(--pt-soft);padding:6px 8px;border-bottom:1px solid var(--pt-line)}.pt-table td{padding:6px 8px;border-bottom:1px solid var(--pt-line)}.pt-table tr.me td{background:var(--pt-brandbg);font-weight:700}.pt-summary-score{font-size:48px;font-weight:800;color:var(--pt-brand)}.pt-side{display:grid;gap:16px}.pt-streak{padding:18px;display:flex;align-items:center;gap:14px;background:linear-gradient(135deg,#fff7ed,var(--pt-card))}.dark .pt-streak{background:linear-gradient(135deg,rgba(234,88,12,.15),var(--pt-card))}.pt-flame{font-size:40px;filter:drop-shadow(0 4px 8px rgba(234,88,12,.35));transition:transform .3s}.pt-flame.bump{animation:pt-pop .5s both}.pt-streak b{font-size:30px;display:block;line-height:1}.pt-ringcard{padding:18px;text-align:center}.pt-ringcard svg{display:block;margin:0 auto 6px}.pt-ring-bg{fill:none;stroke:var(--pt-line);stroke-width:12}.pt-ring-fg{fill:none;stroke:var(--pt-brand);stroke-width:12;stroke-linecap:round;transition:stroke-dashoffset .8s cubic-bezier(.2,.8,.2,1)}.pt-ring-pct{font:700 32px Archivo,sans-serif;fill:var(--pt-ink)}.pt-ring-sub{font:13px Archivo,sans-serif;fill:var(--pt-soft)}.pt-topics{padding:18px}.pt-topic{margin:12px 0;font-size:14px}.pt-topic-row{display:flex;justify-content:space-between;margin-bottom:5px}.pt-meter{height:8px;border-radius:4px;background:var(--pt-line);overflow:hidden}.pt-meter i{display:block;height:100%;border-radius:4px;background:var(--pt-brand2);transition:width .8s cubic-bezier(.2,.8,.2,1)}.pt-topic.weak .pt-meter i{background:var(--pt-amber)}.pt-weak{width:100%;margin-top:8px;justify-content:center}.pt-heat{display:grid;grid-template-columns:repeat(10,1fr);gap:4px;margin-top:10px}.pt-heat i{aspect-ratio:1;border-radius:3px;background:var(--pt-line);display:block}@keyframes pt-flip{0%{transform:rotateX(90deg);opacity:0}to{transform:none;opacity:1}}@keyframes pt-drop{0%{transform:translate(-50%,-24px);opacity:0}to{transform:translate(-50%);opacity:1}}@keyframes pt-glow{0%{filter:brightness(1.15)}to{filter:none}}@keyframes pt-pop{0%{transform:scale(.6);opacity:0}70%{transform:scale(1.08)}to{transform:scale(1);opacity:1}}@keyframes pt-rise{0%{transform:translateY(10px);opacity:0}to{transform:none;opacity:1}}@media (prefers-reduced-motion: reduce){.pt *,.pt *:before,.pt *:after{animation:none!important;transition:none!important}}@media (max-width: 860px){.pt-grid{grid-template-columns:1fr}.pt-side{grid-template-columns:1fr 1fr}.pt-topics{grid-column:1 / -1}}@media (max-width: 560px){.pt-q,.pt-sol,.pt-summary{padding:18px 16px}.pt-answers,.pt-choices{grid-template-columns:1fr}.pt-bits{grid-template-columns:1fr 1fr;-moz-column-gap:6px;column-gap:6px;row-gap:30px}.pt-octlab{display:none}.pt-b{height:28px;font-size:12px}.pt-oct{gap:2px;padding:4px}.pt-seg{font-size:9px}.pt-side{grid-template-columns:1fr}}
