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a.active{background:var(--rail-active);color:var(--ink-950)}.topbar-vendor{border-radius:var(--r-pill);background:var(--bg-700);align-items:center;gap:2px;padding:3px;display:inline-flex}.topbar-vendor>span{color:var(--ink-500);padding:0 8px 0 10px;font-size:13px;font-weight:600}.topbar-vendor button{border-radius:var(--r-pill);color:var(--ink-700);background:0 0;border:0;padding:5px 12px;font-size:14px;font-weight:600}.topbar-vendor button[aria-pressed=true]{background:var(--ink-950);color:var(--bg-950)}.topbar-vendor-select{display:none}.rail-vendor{padding:var(--s-3) 12px 0}.rail-vendor .topbar-vendor{border-radius:var(--r-md);flex-wrap:wrap;display:flex}.rail-vendor .topbar-vendor>span{flex-basis:100%;padding:6px 10px 4px}.rail-vendor .topbar-vendor button{flex:1;min-width:0;padding:8px}.section-tabs{width:fit-content;max-width:100%;margin:0 0 var(--s-6);border-radius:var(--r-md);background:var(--canvas-2);flex-wrap:wrap;gap:4px;padding:4px;display:flex}.section-tabs a{border-radius:var(--r-sm);font-size:var(--fs-15);color:var(--ink-600);align-items:center;gap:8px;padding:8px 14px;font-weight:600;text-decoration:none;display:inline-flex}.section-tabs a:hover{color:var(--ink-950)}.section-tabs a.active{background:var(--surface);color:var(--ink-950);box-shadow:var(--shadow-1)}.section-tab-tag{border:1px solid var(--line-300);border-radius:var(--r-pill);font-family:var(--font-mono);color:var(--ink-500);padding:1px 7px;font-size:12px;font-weight:500}
.mock{border:1px solid var(--line-200);background:var(--bg-900);text-align:left;color:var(--ink-800);border-radius:12px;font-size:14px;line-height:1.4;overflow:hidden;box-shadow:0 1px 2px #1012160f,0 18px 40px -22px #10121652}.mock code{font-family:var(--font-mono);font-size:inherit;color:inherit;background:0 0;border:0;padding:0}.mock-code-head{border-bottom:1px solid var(--line-100);background:var(--night-800);padding:0 14px;display:flex}.mock-code-file{border-bottom:2px solid var(--ink-950);font-family:var(--font-mono);color:var(--ink-900);margin-bottom:-1px;padding:9px 2px 8px;font-size:13px}.mock-code-lines{counter-reset:line;font-family:var(--font-mono);margin:0;padding:10px 0;font-size:14px;line-height:1.8;list-style:none;overflow:hidden}.mock-code-lines li{counter-increment:line;white-space:pre;gap:14px;padding-right:14px;display:flex}.mock-code-lines li:before{content:counter(line);text-align:right;width:30px;color:var(--ink-400);flex:none}.mock-code-lines li.live{background:var(--editor-power-bg);box-shadow:inset 3px 0 0 var(--editor-power)}.mock-kw{color:var(--syntax-keyword)}.mock-tag{color:var(--syntax-variable)}.mock-num{color:var(--syntax-number)}.mock-tests>div{padding:14px 16px}.mock-tests-head{justify-content:space-between;align-items:center;gap:12px;margin-bottom:12px;display:flex}.mock-tests-head strong{color:var(--ink-950);font-weight:650}.mock-tests-head span{border-radius:var(--r-pill);white-space:nowrap;padding:3px 10px;font-size:13px;font-weight:650}.mock-tests-head .good{background:var(--ok-100);color:var(--ok-700)}.mock-tests-head .bad{background:var(--fault-100);color:var(--fault-700)}.mock-tests ul{gap:8px;margin:0;padding:0;list-style:none;display:grid}.mock-tests li{color:var(--ink-700);align-items:flex-start;gap:9px;display:flex}.mock-tests li svg{width:18px;height:18px;color:var(--bg-950);background:var(--lamp-500);border-radius:50%;flex:none;padding:2px}.mock-tests li.bad{color:var(--ink-950);font-weight:600}.mock-tests li.bad svg{background:var(--fault-700)}.mock-replay{border-top:1px solid var(--line-100);align-items:center;gap:12px;margin-top:14px;padding-top:14px;display:flex}.mock-replay-button{background:var(--ink-950);color:var(--bg-950);white-space:nowrap;border-radius:7px;align-items:center;gap:6px;padding:5px 10px;font-size:13px;font-weight:600;display:inline-flex}.mock-replay-track{background:linear-gradient(90deg, var(--ink-400) 0 62%, var(--bg-650) 62% 100%);border-radius:2px;flex:1;height:4px;position:relative}.mock-replay-track i{background:var(--fault-700);width:12px;height:12px;box-shadow:0 0 0 4px var(--fault-100);border-radius:50%;margin:-6px;position:absolute;top:50%;left:62%}.mock-replay-scan{font-family:var(--font-mono);color:var(--ink-500);white-space:nowrap;font-size:13px}.mock-readings>div{grid-auto-columns:minmax(0,1fr);grid-auto-flow:column;display:grid}.mock-readings span{gap:2px;padding:10px 14px;display:grid}.mock-readings span+span{border-left:1px solid var(--line-100)}.mock-readings small{color:var(--ink-500);font-size:13px}.mock-readings strong{color:var(--ink-950);font-size:15px;font-weight:700}.mock-readings .on strong{color:var(--lamp-700)}.mock-readings strong code{color:var(--ink-500);margin-left:4px;font-size:13px;font-weight:400}.mock-transport>div{flex-wrap:wrap;align-items:center;gap:8px;padding:10px;display:flex}.mock-btn{border:1px solid var(--line-300);background:var(--bg-850);color:var(--ink-900);white-space:nowrap;border-radius:7px;align-items:center;gap:6px;padding:6px 11px;font-size:13px;font-weight:600;display:inline-flex}.mock-btn.dark{border-color:var(--ink-950);background:var(--ink-950);color:var(--bg-950)}.mock-running{border-radius:var(--r-pill);background:var(--ok-100);color:var(--ok-700);align-items:center;gap:6px;margin-left:auto;padding:5px 10px;font-size:13px;font-weight:600;display:inline-flex}.mock-brief>div,.mock-lesson>div{gap:6px;padding:18px 20px 20px;display:grid}.mock-brief small,.mock-lesson small{font-family:var(--font-mono);color:var(--ink-500);font-size:13px}.mock-brief strong,.mock-lesson strong{letter-spacing:-.01em;color:var(--ink-950);font-size:17px;font-weight:650}.mock-brief p,.mock-lesson p{color:var(--ink-600);margin:0 0 6px}.mock-brief-io{border-top:1px solid var(--line-100);grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;padding-top:10px;display:grid}.mock-brief-io>span{flex-wrap:wrap;align-items:center;gap:6px;display:flex}.mock-brief-io em{color:var(--ink-500);flex-basis:100%;font-size:13px;font-style:normal;font-weight:600}.mock-brief-io code{background:var(--bg-700);color:var(--syntax-variable);border-radius:6px;padding:3px 8px;font-size:13px}.mock-lesson ol{gap:8px;margin:0;padding:0;list-style:none;display:grid}.mock-lesson li{color:var(--ink-800);align-items:center;gap:10px;display:flex}.mock-lesson li b{background:var(--lamp-tint);width:24px;height:24px;color:var(--lamp-700);border-radius:50%;flex:none;place-items:center;font-size:13px;font-weight:700;display:grid}