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.hint-command .hint-prose{display:block;margin-top:6px}.statusline{min-height:61px;padding:10px 16px;justify-content:space-between;gap:12px;white-space:normal;background:var(--bg-1);font-family:var(--sans);font-size:12px}.session-state{display:flex;align-items:center;min-width:0;gap:9px}.session-state>i{width:8px;height:8px;flex:0 0 auto;border-radius:50%;background:var(--uncommon);box-shadow:0 0 10px #45a06a73}.session-state>span{display:flex;min-width:0;flex-direction:column}.session-state b{color:var(--fg);font-size:12.5px}.session-state small{overflow:hidden;text-overflow:ellipsis;color:var(--fg-3);font-size:11px;white-space:nowrap}.session-summary{flex:0 0 auto;color:var(--fg);font-size:13px;font-weight:700;text-align:right;font-variant-numeric:tabular-nums}.session-summary small{display:block;color:var(--fg-3);font-size:10.5px;font-weight:500}.main{container-type:inline-size;background:var(--bg)}.mainbar{min-height:72px;grid-template-columns:auto minmax(220px,560px) auto;gap:clamp(12px,2vw,28px);padding:10px 18px;background:#121217f5}.seg{grid-column:1;justify-self:start;padding:4px;border-radius:10px;background:var(--bg)}.seg-pill{top:4px;bottom:4px;border-radius:7px;background:var(--bg-3)}.seg-btn{min-height:36px;padding:7px 17px;font-family:var(--sans);font-size:13px;font-weight:600;letter-spacing:0}.seg-key{display:inline-grid;place-items:center;min-width:18px;height:18px;margin-right:7px;border:1px solid var(--line-2);border-radius:5px;color:var(--fg-3);font-size:10px}.seg-btn.on .seg-key{border-color:var(--accent-ring);color:var(--accent);background:var(--accent-soft)}.mainbar-nar{grid-column:2;justify-self:stretch;min-width:0;margin:0}.mainbar-coach{grid-column:3;justify-self:end}.nar-bar{width:100%;min-width:0;gap:7px;padding:6px 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.coach-badge{position:absolute;top:-7px;right:-6px}.content{display:grid;grid-template-columns:minmax(0,1fr) 0;transition:grid-template-columns .22s cubic-bezier(.4,0,.2,1);overflow:hidden}.coach-open .content{grid-template-columns:minmax(0,1fr) minmax(320px,390px)}.workspace-stage{position:relative;min-width:0;min-height:0;overflow:hidden}.study-inner{max-width:940px;padding:36px clamp(24px,4vw,54px) 70px}.lesson{margin-top:18px}.lesson h3{font-size:21px;margin-top:31px}.lesson p,.lesson li{font-size:16.5px}.scene-stage{margin:18px 0 22px}.scene-caption{font-size:15.5px;padding:14px 18px 16px}.qcard{padding:20px 21px;border-radius:var(--radius-lg)}.qprompt{font-size:16px}.qopt{min-height:44px;padding:11px 13px;font-size:14.5px}.coach-sidecar{min-width:0;min-height:0;display:grid;grid-template-columns:minmax(0,1fr);grid-template-rows:auto auto minmax(0,1fr) auto;border-left:1px solid var(--line);background:linear-gradient(180deg,rgba(245,184,46,.035),transparent 190px),var(--bg-1);overflow:hidden}.coach-pop-head{min-height:74px;padding:16px 17px;border-bottom:1px solid var(--line)}.coach-pop-head>span{min-width:0}.coach-pop-head .eyebrow{margin:0 0 3px;color:var(--accent)}.coach-pop-head h2{font-size:19px}.coach-context{display:flex;flex-direction:column;gap:3px;padding:13px 17px;border-bottom:1px solid var(--line);background:#1c1c228c}.coach-context span{color:var(--fg-3);font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.11em}.coach-context b{overflow:hidden;text-overflow:ellipsis;color:var(--fg);font-size:13px;white-space:nowrap}.coach-sidecar .coach-log{min-height:0;padding:16px;gap:15px}.coach-sidecar .coach-empty{margin:0;padding:13px;border:1px solid var(--line);border-radius:10px;background:var(--bg-2);font-size:14px;line-height:1.6}.coach-sidecar .msg{font-size:14px}.coach-sidecar .msg-text{padding:11px 12px}.coach-sidecar .coach-input{padding:14px}.coach-sidecar .coach-input input{min-width:0}@container (max-width: 760px){.coach-open .content{grid-template-columns:minmax(0,1fr)}.coach-sidecar{position:absolute;top:0;right:0;bottom:0;width:min(390px,100%);z-index:35;box-shadow:-18px 0 44px #0000006b}}@container (max-width: 700px){.mainbar{grid-template-columns:minmax(0,1fr) auto;grid-template-rows:auto auto;gap:8px 12px;padding:9px 12px}.seg{grid-column:1;grid-row:1}.mainbar-coach{grid-column:2;grid-row:1}.mainbar-nar{grid-column:1 / -1;grid-row:2}.coach-launch kbd{display:none}}@media(max-width:720px){.mobile .rail{width:min(92vw,420px)}.mobile .railbar{min-height:66px;padding:12px 14px}.mobile .railbar-actions{gap:5px}.mobile .railbar .brand-word{display:none}.mobile .task{padding:20px 17px}.mobile .task-title{max-width:none;font-size:23px}.mobile .rail-mid{padding:11px}.mobile .mtopbar{min-height:58px;padding:10px 12px;background:var(--bg-1)}.mobile .mainbar{display:grid;min-height:0;grid-template-columns:minmax(0,1fr) auto;gap:8px;padding:9px 10px}.mobile .seg{width:max-content;max-width:100%;overflow-x:auto}.mobile .seg-btn{padding:6px 11px}.mobile .mainbar-coach{grid-column:2;grid-row:1}.mobile .mainbar-nar{grid-column:1 / -1;grid-row:2;width:100%}.mobile .coach-launch{width:40px;padding:0;justify-content:center}.mobile .coach-launch>span:not(.coach-launch-mark),.mobile .coach-launch kbd{display:none}.mobile .content,.mobile.coach-open .content{display:block}.mobile .workspace-stage{position:absolute;top:0;right:0;bottom:0;left:0}.mobile .coach-sidecar{position:absolute;top:0;right:0;bottom:0;left:0;z-index:35;border-left:0}.mobile .study-inner{padding:24px 16px 52px}.mobile .lesson p,.mobile .lesson li{font-size:16px}.mobile .scene-caption{font-size:14px;padding:11px 13px 13px}.mobile .nar-btn{min-width:29px;padding:0 4px}.mobile .nar-start{min-width:38px}.mobile .nar-time{font-size:10.5px}}.examnav{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:10px 20px;border-bottom:1px solid var(--line);background:#121217f5}.examnav-timer{font-family:var(--mono);font-size:15px;font-weight:600;letter-spacing:.01em;font-variant-numeric:tabular-nums;color:var(--fg)}.examnav-timer[data-low=true]{color:var(--danger)}.examnav-nav{display:flex;align-items:center;gap:14px}.examnav-btn{min-height:34px;padding:0 14px;border:1px solid var(--line-2);border-radius:var(--radius-sm);background:var(--bg-2);color:var(--fg);font-family:var(--sans);font-size:13px;font-weight:600;cursor:pointer;transition:border-color .12s ease,background .12s ease}.examnav-btn:hover:not(:disabled){border-color:var(--accent-ring);background:var(--accent-soft);color:var(--accent)}.examnav-btn:disabled{opacity:.4;cursor:not-allowed}.examnav-pos{min-width:5.5ch;text-align:center;font-family:var(--label);font-size:12.5px;font-weight:600;font-variant-numeric:tabular-nums;color:var(--fg-3)}@media(max-width:720px){.examnav-timer{display:none}.examnav{padding:8px 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ease}.examq-opt:hover:not(:disabled){border-color:var(--line-2);background:var(--card-hov)}.examq-opt:disabled{cursor:not-allowed}.examq-opt.picked{border-color:var(--accent);background:var(--accent-soft);color:var(--fg)}.examq-opt.correct{border-color:var(--uncommon);background:#45a06a1a;color:var(--fg)}.examq-opt.bad{border-color:var(--danger);background:#e2555a1a;color:var(--fg)}.examq-key{flex:none;font-family:var(--mono);font-size:12px;color:var(--fg-3);border:1px solid var(--line);border-radius:5px;padding:2px 7px;margin-top:1px}.examq-opt.correct .examq-key{color:var(--uncommon);border-color:var(--uncommon)}.examq-opt.bad .examq-key{color:var(--danger);border-color:var(--danger)}.examq-feedback{margin-top:22px;padding:16px 19px;border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:0 var(--radius) var(--radius) 0;background:var(--bg-2)}.examq-feedback.ok{border-left-color:var(--uncommon)}.examq-feedback.bad{border-left-color:var(--danger)}.examq-verdict{font-family:var(--label);font-size:12.5px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;margin:0 0 9px;color:var(--fg-3)}.examq-feedback.ok .examq-verdict{color:var(--uncommon)}.examq-feedback.bad .examq-verdict{color:var(--danger)}.examq-answer{font-size:14.5px;line-height:1.55;color:var(--fg);margin:0 0 8px}.examq-explain{font-size:14.5px;line-height:1.62;color:var(--fg-2);margin:0}.examq-source{display:block;margin-top:12px;overflow-wrap:anywhere;font-family:var(--mono);font-size:12.5px;color:var(--accent);text-decoration:underline;text-decoration-color:var(--accent-ring);text-underline-offset:3px}.examq-source:hover{color:var(--fg);text-decoration-color:var(--fg)}@media(max-width:720px){.examq-prompt{font-size:18px}.examq-opt{padding:11px 13px;font-size:14.5px}}@media(max-width:360px){.guide-card .guide-step{grid-template-columns:25px minmax(0,1fr);gap:6px}.guide-card .guide-step-n{width:22px;height:22px;font-size:9.5px}.guide-card .hint-command .code-chip{gap:7px;padding:8px}.guide-card .code-chip-tag{margin-left:7px}.guide-reveal{padding:8px 10px}}/**
 * Copyright (c) 2014 The xterm.js authors. All rights reserved.
 * Copyright (c) 2012-2013, Christopher Jeffrey (MIT License)
 * https://github.com/chjj/term.js
 * @license MIT
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * Originally forked from (with the author's permission):
 *   Fabrice Bellard's javascript vt100 for jslinux:
 *   http://bellard.org/jslinux/
 *   Copyright (c) 2011 Fabrice Bellard
 *   The original design remains. The terminal itself
 *   has been extended to include xterm CSI codes, among
 *   other features.
 */.xterm{cursor:text;position:relative;user-select:none;-ms-user-select:none;-webkit-user-select:none}.xterm.focus,.xterm:focus{outline:none}.xterm .xterm-helpers{position:absolute;top:0;z-index:5}.xterm .xterm-helper-textarea{padding:0;border:0;margin:0;position:absolute;opacity:0;left:-9999em;top:0;width:0;height:0;z-index:-5;white-space:nowrap;overflow:hidden;resize:none}.xterm .composition-view{background:#000;color:#fff;display:none;position:absolute;white-space:nowrap;z-index:1}.xterm .composition-view.active{display:block}.xterm .xterm-viewport{background-color:#000;overflow-y:scroll;cursor:default;position:absolute;right:0;left:0;top:0;bottom:0}.xterm .xterm-screen{position:relative}.xterm .xterm-screen canvas{position:absolute;left:0;top:0}.xterm .xterm-scroll-area{visibility:hidden}.xterm-char-measure-element{display:inline-block;visibility:hidden;position:absolute;top:0;left:-9999em;line-height:normal}.xterm.enable-mouse-events{cursor:default}.xterm.xterm-cursor-pointer,.xterm .xterm-cursor-pointer{cursor:pointer}.xterm.column-select.focus{cursor:crosshair}.xterm .xterm-accessibility:not(.debug),.xterm .xterm-message{position:absolute;left:0;top:0;bottom:0;right:0;z-index:10;color:transparent;pointer-events:none}.xterm .xterm-accessibility-tree:not(.debug) *::selection{color:transparent}.xterm .xterm-accessibility-tree{-webkit-user-select:text;user-select:text;white-space:pre}.xterm .live-region{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}.xterm-dim{opacity:1!important}.xterm-underline-1{text-decoration:underline}.xterm-underline-2{text-decoration:double underline}.xterm-underline-3{text-decoration:wavy underline}.xterm-underline-4{text-decoration:dotted underline}.xterm-underline-5{text-decoration:dashed underline}.xterm-overline{text-decoration:overline}.xterm-overline.xterm-underline-1{text-decoration:overline underline}.xterm-overline.xterm-underline-2{text-decoration:overline double underline}.xterm-overline.xterm-underline-3{text-decoration:overline wavy underline}.xterm-overline.xterm-underline-4{text-decoration:overline dotted underline}.xterm-overline.xterm-underline-5{text-decoration:overline dashed underline}.xterm-strikethrough{text-decoration:line-through}.xterm-screen .xterm-decoration-container .xterm-decoration{z-index:6;position:absolute}.xterm-screen .xterm-decoration-container .xterm-decoration.xterm-decoration-top-layer{z-index:7}.xterm-decoration-overview-ruler{z-index:8;position:absolute;top:0;right:0;pointer-events:none}.xterm-decoration-top{z-index:2;position:relative}