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var(--brass)}.lo-step{width:22px;height:22px;color:var(--muted);background:#f1ece20f;border-radius:6px;flex:none;place-items:center;font-size:11.5px;display:grid}.lo-line.is-on .lo-step{background:var(--brass);color:var(--paper-ink)}.lo-line.is-done .lo-step{color:var(--sage)}.lo-steps{flex-direction:column;gap:4px;display:flex}.lo-steps button{width:100%;font:500 13.5px/1.4 var(--mono);color:var(--muted);text-align:start;border-radius:9px;align-items:center;gap:10px;padding:6px 8px;display:flex}.lo-steps li.is-done button{color:var(--ink-2)}.lo-steps li.is-on button{background:var(--brass-soft);color:var(--ink)}.lo-n{width:22px;height:22px;box-shadow:inset 0 0 0 1px var(--line-strong);border-radius:50%;place-items:center;font-size:11.5px;display:grid}.lo-steps li.is-on .lo-n{background:var(--brass);color:var(--paper-ink);box-shadow:none}.lo-steps li.is-done .lo-n{color:var(--sage);box-shadow:inset 0 0 0 1px #8ebca573}.lo-explain{min-height:3.4em;color:var(--ink-2);margin-top:14px;font-size:15.5px}.lo-explain strong{color:var(--brass-hi);font-family:var(--mono)}.lo-ctrl{align-items:center;gap:8px;margin-top:12px;display:flex}.lo-ctrl .muted{margin-inline-start:auto;font-size:13px}.pipe-row{counter-reset:s;grid-template-columns:repeat(8,minmax(0,1fr));gap:6px;display:grid}.pipe-row li{position:relative}.pipe-row button{width:100%;box-shadow:inset 0 0 0 1px var(--line);color:var(--ink-2);text-align:center;border-radius:14px;flex-direction:column;align-items:center;gap:8px;min-height:100%;padding:12px 4px;font-size:12.5px;line-height:1.3;transition:background-color .2s,box-shadow .2s;display:flex}.pipe-row button:hover{background:#f1ece20a}.pipe-row li.is-on button{background:var(--brass-soft);color:var(--ink);box-shadow:inset 0 0 0 1px #d6b26a73}.pipe-ico{width:36px;height:36px;color:var(--brass);background:#f1ece20d;border-radius:11px;place-items:center;display:grid}.pipe-explain{color:var(--ink-2);min-height:3.4em;margin-top:14px;font-size:15.5px}.pipe-explain strong{color:var(--brass-hi)}.schema-grid{grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:10px;margin-bottom:12px;display:grid}.tbl{box-shadow:inset 0 0 0 1px var(--line);background:#101116;border-radius:14px;flex-direction:column;gap:8px;padding:12px;display:flex}.tbl.is-on{box-shadow:inset 0 0 0 1px #d6b26a80}.tbl header{justify-content:space-between;align-items:baseline;gap:8px;font-size:14.5px;display:flex}.tbl header strong{color:var(--brass-hi);font-family:var(--mono);font-weight:600}.tbl header span{font-size:12px}.tbl ul{font:12.5px/1.55 var(--mono);color:var(--ink-2);flex-direction:column;flex:1;gap:2px;display:flex}.tbl li{align-items:center;gap:6px;display:flex}.key{text-align:center;border-radius:4px;flex:none;width:22px;font-size:9.5px;font-weight:700}.key-pk{color:var(--paper-ink);background:var(--brass)}.key-fk{color:var(--sage);box-shadow:inset 0 0 0 1px #8ebca580}.fk-ref{font-size:11.5px}.tbl .btn{align-self:flex-start}.auth{color:var(--ink);background:0 0;border:0;width:100%;max-width:min(460px,100vw - 24px);padding:0}.auth::backdrop{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#060709b8}.auth-box{background:var(--card-2);box-shadow:0 0 0 1px var(--line-strong), 0 30px 70px -20px #000000e6;border-radius:22px;padding:22px}.auth-head{justify-content:space-between;align-items:center;margin-bottom:16px;display:flex}.auth-head h2{font-size:21px;font-weight:700}.auth-form{flex-direction:column;gap:14px;display:flex}.auth-form>.btn{justify-content:center;margin-top:4px}.field{flex-direction:column;gap:6px;font-size:14px;font-weight:500;display:flex}.field input{width:100%;height:46px;color:var(--ink);font:inherit;box-shadow:inset 0 0 0 1px var(--line-strong);background:#0f1014;border:0;border-radius:12px;outline:0;padding-inline:14px;font-size:16px}.field input:focus{box-shadow:inset 0 0 0 1px #d6b26ab3,0 0 0 3px #d6b26a1f}.field small{font-size:12.5px;font-weight:400}.pw{display:block;position:relative}.pw input{padding-inline-end:72px}.pw-toggle{inset-inline-end:8px;color:var(--brass-hi);border-radius:8px;padding:6px 8px;font-size:12.5px;position:absolute;top:50%;transform:translateY(-50%)}.hp{opacity:0;width:1px;height:1px;position:absolute;left:-9999px}.auth-links{flex-wrap:wrap;justify-content:space-between;gap:8px;display:flex}.auth-links button{color:var(--brass-hi);font-size:14px}.auth-links button:hover{text-underline-offset:4px;text-decoration:underline}.auth-done{color:var(--ink-2);flex-direction:column;align-items:flex-start;gap:16px;display:flex}.scrim{display:none}@media (width<=1020px){.lab-body{grid-template-columns:minmax(0,1fr)}.side-open,.side-close{display:inline-grid}.side{top:0;bottom:0;z-index:90;width:min(320px,86vw);height:100vh;transition:transform .35s cubic-bezier(.22,1,.36,1);position:fixed;inset-inline-start:0;transform:translate(-102%);box-shadow:20px 0 60px -20px #000c}[dir=rtl] .side{transform:translate(102%)}.side.is-open{transform:none}.scrim{z-index:80;background:#06070999;display:block;position:fixed;inset:0}.pipe-row{grid-template-columns:repeat(4,minmax(0,1fr))}}@media (width<=720px){.lo-grid{grid-template-columns:minmax(0,1fr)}.lo-side{order:-1}.lo-steps{flex-flow:wrap}.lo-steps li{flex:none}.lo-steps button{padding:5px 8px}.brand-t small,.hide-sm{display:none}.level-nav{flex-direction:column}.level-nav .btn{max-width:100%}.chal{padding:14px}.runbar-hint{display:none}}@media (width<=460px){.topbar .lang-btn span{display:none}.topbar .lang-btn{justify-content:center;width:40px;padding:0}.pipe-row{grid-template-columns:repeat(2,minmax(0,1fr))}.score-ring{width:104px;height:104px}}.lesson>.chal-exercise{background:linear-gradient(180deg, #8ebca50f, transparent 70%), var(--card);margin:6px 0 10px;box-shadow:inset 0 0 0 1px #8ebca538}.chal-exercise .chal-badge{background:var(--sage-soft);color:var(--sage);width:36px;height:36px;font-size:13px;box-shadow:inset 0 0 0 1px #8ebca566}.chal-exercise .chal-kicker{color:var(--sage);font-weight:600}.chal-exercise .chal-title{font-size:16.5px}.chal-exercise.is-passed{box-shadow:inset 0 0 0 1px #8ebca580}.chal-final{background:radial-gradient(120% 120% at 0% 0%, #d6b26a24, transparent 55%), var(--card);padding:clamp(18px,3vw,28px);box-shadow:inset 0 0 0 1px #d6b26a59,0 24px 60px -34px #d6b26a59}.chal-final .chal-badge{background:var(--brass);width:46px;height:46px;color:var(--paper-ink);box-shadow:none;border-radius:14px}.chal-final .chal-kicker{color:var(--brass-hi);letter-spacing:.02em;font-weight:600}.chal-final .chal-title{font-size:20px}.chal-final .chal-prompt{font-size:16.5px}.pow{box-shadow:inset 0 0 0 1px var(--line-strong);color:var(--ink-2);background:#0f1014;border-radius:12px;align-items:center;gap:10px;padding:11px 14px;font-size:14px;display:flex}.pow-ico{width:28px;height:28px;color:var(--muted);background:#f1ece20f;border-radius:8px;flex:none;place-items:center;display:grid}.pow-done .pow-ico{background:var(--sage-soft);color:var(--sage)}.pow-done{color:var(--sage);box-shadow:inset 0 0 0 1px #8ebca573}.pow-error{box-shadow:inset 0 0 0 1px #e89a6b73}.pow-text{flex-direction:column;flex:1;gap:6px;display:flex}.pow-bar{background:#f1ece214;border-radius:2px;height:4px;display:block;overflow:hidden}.pow-bar i{background:var(--brass);height:100%;transition:width .3s;display:block}.pow-retry{color:var(--brass-hi);font-size:13.5px;font-weight:600}