:root{color-scheme:light;--ink:#172033;--text:#26354b;--muted:#64748b;--line:#dce3ec;--soft:#f4f7fa;--surface:#fff;--brand:#1769e0;--brand-dark:#1257bd;--green:#168247;--green-soft:#eaf7ef;--amber:#a25700;--amber-soft:#fff7e7;--red:#b4232c;--red-soft:#fff0f1;--top:64px;--course:48px;--sidebar:280px;--aside:220px;--shadow:0 20px 60px rgba(20,35,55,.12);--font:Inter,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;--mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:calc(var(--top) + var(--course) + 24px)}body{margin:0;color:var(--text);background:var(--surface);font:16px/1.7 var(--font);-webkit-font-smoothing:antialiased}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{color:inherit}a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}:focus-visible{outline:3px solid rgb(23 105 224/.35);outline-offset:3px;border-radius:7px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}.skip-link{position:fixed;z-index:200;top:8px;left:8px;padding:10px 14px;color:#fff;background:var(--brand);border-radius:9px;transform:translateY(-160%)}.skip-link:focus{transform:none}.site-header{position:sticky;z-index:80;top:0;height:var(--top);padding:0 20px;display:grid;grid-template-columns:minmax(220px,1fr) minmax(300px,580px) minmax(360px,1fr);align-items:center;gap:20px;background:rgb(255 255 255/.96);border-bottom:1px solid var(--line);backdrop-filter:blur(18px)}.brand{width:max-content;display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:800}.brand:hover{text-decoration:none}.brand-mark{width:38px;height:38px;display:grid;place-items:center;color:#fff;background:linear-gradient(145deg,#1b78f2,#1557c3);border-radius:10px;font:700 12px var(--mono);box-shadow:inset 0 0 0 1px rgb(255 255 255/.25)}.icon-button{width:44px;height:44px;padding:0;display:grid;place-items:center;background:transparent;border:0;border-radius:10px;cursor:pointer}.icon-button:hover{background:var(--soft)}.menu-button,.sidebar-close{display:none}.search-trigger{height:42px;padding:0 10px 0 13px;display:flex;align-items:center;gap:10px;color:var(--muted);background:#f2f5f8;border:1px solid #dbe2ea;border-radius:10px;cursor:pointer}.search-trigger:hover{border-color:#b8c5d5;background:#f8fafc}.search-trigger span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.search-trigger kbd{margin-left:auto;padding:2px 7px;color:#718096;background:#fff;border:1px solid #d5dce6;border-bottom-width:2px;border-radius:6px;font:12px var(--font)}.header-actions{display:flex;align-items:center;justify-content:flex-end;gap:4px}.header-actions a{min-height:44px;padding:0 10px;display:flex;align-items:center;color:var(--text);border-radius:9px;font-size:13px}.header-actions a:hover{color:var(--brand);background:#edf5ff;text-decoration:none}.header-actions .editor-link{color:#fff;background:var(--green)}.header-actions .editor-link:hover{color:#fff;background:#116c3b}.progress-badge{width:44px;height:44px;display:grid;place-items:center;color:var(--brand);border:1px solid var(--line);border-radius:50%;font-size:11px;font-weight:800}.course-strip{position:sticky;z-index:70;top:var(--top);height:var(--course);display:flex;align-items:stretch;overflow-x:auto;background:#18212f;scrollbar-width:none}.course-strip::-webkit-scrollbar{display:none}.course-strip a{min-width:105px;padding:0 18px;display:flex;align-items:center;justify-content:center;gap:7px;color:#dce5f1;border-right:1px solid rgb(255 255 255/.08);font-size:13px;font-weight:750;white-space:nowrap}.course-strip a:hover,.course-strip a.is-active{color:#fff;background:#26364a;text-decoration:none}.course-strip a::before{width:7px;height:7px;background:var(--course-color,#94a3b8);border-radius:50%;content:""}.app-layout{min-height:calc(100dvh - var(--top) - var(--course));display:grid;grid-template-columns:var(--sidebar) minmax(0,1fr) var(--aside);align-items:start}.lesson-sidebar{position:sticky;top:calc(var(--top) + var(--course));height:calc(100dvh - var(--top) - var(--course));padding:22px 14px 30px;overflow-y:auto;background:#f7f9fb;border-right:1px solid var(--line)}.sidebar-heading{height:36px;padding:0 8px;display:flex;align-items:center;justify-content:space-between;color:var(--ink);font-weight:800}.course-summary{margin:10px 4px 18px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:12px}.course-summary span{display:block;margin-bottom:5px;font-size:11px;font-weight:800;letter-spacing:.08em}.course-summary strong{display:block;color:var(--ink);font-size:18px}.course-summary p{margin:5px 0 0;color:var(--muted);font-size:12px;line-height:1.55}.lesson-nav{display:grid;gap:2px}.lesson-nav a{min-height:44px;padding:8px 10px;display:grid;grid-template-columns:25px 1fr;align-items:center;gap:8px;color:#46576e;border-radius:9px;font-size:13px;line-height:1.35}.lesson-nav a:hover{color:var(--ink);background:#eaf0f6;text-decoration:none}.lesson-nav a.is-active{color:#0f55b5;background:#dfecff;font-weight:750}.lesson-index{font:700 11px var(--mono);color:#8a98aa}.lesson-nav a.is-complete .lesson-index{color:#fff;background:var(--green);width:20px;height:20px;display:grid;place-items:center;border-radius:50%;font-size:0}.lesson-nav a.is-complete .lesson-index::after{font-size:11px;content:"✓"}.sidebar-foot{margin-top:22px;padding:16px 8px 0;display:grid;gap:6px;border-top:1px solid var(--line)}.sidebar-foot a,.sidebar-foot button{min-height:42px;padding:0 10px;display:flex;align-items:center;border-radius:8px;font-size:12px}.sidebar-foot a{color:var(--brand);background:#eaf3ff}.sidebar-foot a:hover{text-decoration:none}.sidebar-foot button{color:var(--red);background:transparent;border:0;cursor:pointer}.sidebar-foot button:hover{background:var(--red-soft)}.sidebar-scrim{display:none}.lesson-main{min-width:0;padding:54px clamp(28px,5vw,76px) 100px}.lesson-main article{max-width:820px;margin:0 auto}.lesson-breadcrumb{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:12px}.lesson-breadcrumb a{color:var(--muted)}.lesson-header{padding:30px 0 38px;border-bottom:1px solid var(--line)}.lesson-label{display:inline-flex;align-items:center;gap:7px;color:var(--course-color,var(--brand));font-size:12px;font-weight:850;letter-spacing:.06em}.lesson-label::before{width:9px;height:9px;background:currentColor;border-radius:50%;content:""}.lesson-header h1{margin:14px 0 14px;color:var(--ink);font-size:clamp(40px,5vw,68px);line-height:1.07;letter-spacing:-.055em}.lesson-header>p{max-width:720px;margin:0;color:#526176;font-size:19px;line-height:1.65}.lesson-meta{margin-top:20px;display:flex;align-items:center;flex-wrap:wrap;gap:8px}.lesson-meta span,.lesson-meta a{padding:5px 9px;color:#66768b;background:#f3f6f9;border-radius:999px;font-size:11px}.lesson-meta a{color:var(--brand)}.lesson-actions{margin-top:24px;display:flex;flex-wrap:wrap;gap:10px}.complete-button,.open-editor-button,.copy-button,.quiz-submit{min-height:46px;padding:0 16px;display:inline-flex;align-items:center;justify-content:center;gap:7px;border-radius:10px;font-weight:750;cursor:pointer}.complete-button{color:#fff;background:var(--brand);border:0}.complete-button.is-complete{background:var(--green)}.open-editor-button{color:#fff;background:var(--green)}.open-editor-button:hover{background:#116c3b;text-decoration:none}.lesson-section{padding-top:52px}.lesson-section h2{margin:0 0 17px;color:var(--ink);font-size:31px;letter-spacing:-.035em}.lesson-section>p{margin:0 0 18px;color:#3f5067;font-size:17px;line-height:1.85}.objective-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.objective-card{min-height:130px;padding:18px;background:#f7f9fb;border:1px solid var(--line);border-radius:13px}.objective-card span{display:grid;width:27px;height:27px;place-items:center;color:#fff;background:var(--brand);border-radius:50%;font:700 11px var(--mono)}.objective-card p{margin:18px 0 0;color:#40516a;font-size:13px;line-height:1.55}.code-shell{margin-top:22px;overflow:hidden;background:#15181e;border:1px solid #2b3240;border-radius:14px;box-shadow:0 12px 32px rgb(16 24 40/.13)}.code-toolbar{min-height:48px;padding:0 8px 0 16px;display:flex;align-items:center;justify-content:space-between;color:#aab6c7;background:#202631;border-bottom:1px solid #323a49;font:12px var(--mono)}.copy-button{min-height:38px;padding:0 11px;color:#dbe5f2;background:transparent;border:0;font:12px var(--font)}.copy-button:hover{background:rgb(255 255 255/.08)}pre{margin:0;padding:22px;overflow-x:auto;color:#eef4ff;font:13px/1.75 var(--mono);tab-size:2}code{font-family:var(--mono)}.two-column{display:grid;grid-template-columns:1fr 1fr;gap:16px}.knowledge-card{padding:22px;border:1px solid var(--line);border-radius:14px}.knowledge-card.good{background:#f4fbf7;border-color:#cce9d7}.knowledge-card.warn{background:#fff9ee;border-color:#eedab2}.knowledge-card h3{margin:0 0 12px;color:var(--ink);font-size:17px}.knowledge-card ul{margin:0;padding-left:21px}.knowledge-card li+li{margin-top:9px}.practice-card{padding:26px;background:#eef5ff;border:1px solid #c9ddfa;border-left:4px solid var(--brand);border-radius:14px}.practice-card h3{margin:0;color:var(--ink);font-size:22px}.practice-card p{margin:10px 0 0;line-height:1.75}.practice-card ol{margin:16px 0 0;padding-left:24px}.practice-card li+li{margin-top:8px}.quiz-card{padding:26px;background:#fbfcfe;border:1px solid var(--line);border-radius:14px}.quiz-card fieldset{margin:0;padding:0;border:0}.quiz-card legend{margin-bottom:18px;color:var(--ink);font-size:18px;font-weight:800}.quiz-options{display:grid;gap:9px}.quiz-option{min-height:48px;padding:10px 13px;display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);border-radius:10px;cursor:pointer}.quiz-option:hover{border-color:#99bde9}.quiz-option input{width:18px;height:18px;accent-color:var(--brand)}.quiz-submit{margin-top:16px;color:#fff;background:var(--ink);border:0}.quiz-result{margin:14px 0 0;padding:13px;border-radius:9px;font-size:13px}.quiz-result.correct{color:#0d6132;background:var(--green-soft)}.quiz-result.wrong{color:#8d3111;background:#fff3e9}.lesson-directions{margin-top:70px;padding-top:24px;display:grid;grid-template-columns:1fr 1fr;gap:12px;border-top:1px solid var(--line)}.lesson-direction{min-height:90px;padding:16px;display:grid;align-content:center;color:var(--text);border:1px solid var(--line);border-radius:12px}.lesson-direction.next{text-align:right}.lesson-direction small{color:var(--muted)}.lesson-direction strong{margin-top:4px;color:var(--ink)}.lesson-direction:hover{background:var(--soft);text-decoration:none}.lesson-aside{position:sticky;top:calc(var(--top) + var(--course));height:calc(100dvh - var(--top) - var(--course));padding:36px 18px;overflow-y:auto;background:#fbfcfd;border-left:1px solid var(--line)}.aside-card,.source-note{padding:16px;background:#fff;border:1px solid var(--line);border-radius:12px}.aside-card>span{color:var(--muted);font-size:11px}.aside-card>strong{display:block;margin-top:5px;color:var(--ink);font-size:19px}.progress-track{height:5px;margin-top:12px;overflow:hidden;background:#e8edf3;border-radius:999px}.progress-track i{display:block;width:0;height:100%;background:var(--green);border-radius:inherit;transition:width .2s}.aside-links{margin-top:24px;display:grid;gap:2px}.aside-links strong{margin-bottom:7px;color:var(--ink);font-size:12px}.aside-links a{padding:7px 9px;color:var(--muted);border-left:2px solid transparent;font-size:12px}.aside-links a:hover{color:var(--brand);border-left-color:var(--brand);text-decoration:none}.source-note{margin-top:24px}.source-note strong{color:var(--ink);font-size:12px}.source-note p{margin:7px 0 0;color:var(--muted);font-size:11px;line-height:1.6}.search-dialog{width:min(760px,calc(100% - 32px));max-height:min(760px,calc(100dvh - 48px));padding:0;overflow:hidden;background:#fff;border:1px solid rgb(0 0 0/.14);border-radius:17px;box-shadow:var(--shadow)}.search-dialog::backdrop{background:rgb(15 23 42/.55);backdrop-filter:blur(6px)}.search-panel{display:grid;grid-template-rows:auto auto minmax(0,1fr);max-height:inherit}.search-panel header{height:64px;padding:0 10px 0 18px;display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--line)}.search-panel input{width:100%;height:48px;border:0;outline:0;color:var(--ink);font-size:16px}.search-panel>p{margin:0;padding:10px 18px;color:var(--muted);background:#f8fafc;font-size:11px}.search-results{padding:8px;overflow-y:auto}.search-result{padding:13px;display:grid;grid-template-columns:1fr auto;gap:12px;color:var(--text);border-radius:10px}.search-result:hover{background:var(--soft);text-decoration:none}.search-result strong,.search-result span{display:block}.search-result strong{color:var(--ink);font-size:14px}.search-result p{margin:4px 0 0;color:var(--muted);font-size:12px}.search-result>span{align-self:center;color:var(--brand);font-size:11px}.search-empty{padding:50px 20px;color:var(--muted);text-align:center}.toast{position:fixed;z-index:220;left:50%;bottom:24px;padding:11px 18px;color:#fff;background:#18212f;border-radius:999px;box-shadow:var(--shadow);opacity:0;pointer-events:none;transform:translate(-50%,12px);transition:.2s}.toast.show{opacity:1;transform:translate(-50%,0)}
.section-eyebrow{display:block;margin-bottom:8px;color:var(--course-color,var(--brand));font:800 11px/1.4 var(--mono);letter-spacing:.08em}.principle-lead{padding:26px;display:grid;grid-template-columns:48px minmax(0,1fr);gap:18px;align-items:start;color:#263b58;background:linear-gradient(135deg,#eef5ff,#f8fbff);border:1px solid #c9dcf5;border-left:4px solid var(--course-color,var(--brand));border-radius:14px}.principle-lead>span{width:44px;height:44px;display:grid;place-items:center;color:#fff;background:var(--course-color,var(--brand));border-radius:12px;font:900 24px/1 var(--font)}.principle-lead p{margin:0;font-size:17px;line-height:1.85}.reading-note{margin-top:22px;padding:18px 20px;background:#f8fafc;border:1px solid var(--line);border-radius:12px}.reading-note strong{color:var(--ink);font-size:13px}.reading-note p{margin:6px 0 0;color:var(--muted);font-size:13px;line-height:1.7}.mechanism-flow{margin:0;padding:0;display:grid;list-style:none}.mechanism-flow li{position:relative;min-height:96px;padding:0 0 20px 66px}.mechanism-flow li:not(:last-child)::before{position:absolute;top:40px;bottom:0;left:22px;width:2px;background:#d9e5f4;content:""}.mechanism-flow li>span{position:absolute;z-index:1;top:0;left:0;width:46px;height:46px;display:grid;place-items:center;color:#fff;background:var(--course-color,var(--brand));border:6px solid #eef5ff;border-radius:50%;font:800 10px var(--mono)}.mechanism-flow li>div{padding:15px 18px;background:#fbfcfe;border:1px solid var(--line);border-radius:12px}.mechanism-flow strong{display:block;color:var(--ink);font-size:12px}.mechanism-flow p{margin:5px 0 0;color:#40516a;font-size:14px;line-height:1.7}.code-reading{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.code-reading article{min-height:170px;padding:20px;background:#18212f;border:1px solid #2f3d51;border-radius:14px}.code-reading span{width:28px;height:28px;display:grid;place-items:center;color:#cde0ff;background:#2a3a52;border-radius:8px;font:800 11px var(--mono)}.code-reading p{margin:18px 0 0;color:#dce5f1;font-size:13px;line-height:1.72}.tradeoff-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}.tradeoff-list article{padding:20px;background:#fffaf0;border:1px solid #ead9af;border-radius:13px}.tradeoff-list strong{display:inline-flex;padding:3px 8px;color:#8c4a00;background:#ffedc2;border-radius:999px;font-size:10px;letter-spacing:.05em}.tradeoff-list p{margin:11px 0 0;color:#5b4a2e;font-size:14px;line-height:1.72}.debug-card{padding:24px;background:#121a27;border:1px solid #2a394e;border-radius:15px}.debug-card>p{margin:0 0 18px;color:#aebed1;line-height:1.7}.debug-card ol{margin:0;padding:0;display:grid;gap:10px;list-style:none}.debug-card li{padding:12px 14px;display:grid;grid-template-columns:30px minmax(0,1fr);gap:10px;align-items:start;background:#1b2637;border:1px solid #2c3b50;border-radius:10px}.debug-card li span{width:25px;height:25px;display:grid;place-items:center;color:#bcd3f2;background:#2b3c54;border-radius:7px;font:800 10px var(--mono)}.debug-card li p{margin:0;color:#e0e8f2;font-size:13px;line-height:1.65}
@media(max-width:1160px){:root{--aside:0px}.app-layout{grid-template-columns:var(--sidebar) minmax(0,1fr)}.lesson-aside{display:none}.site-header{grid-template-columns:minmax(190px,1fr) minmax(280px,480px) auto}.header-actions a:not(.editor-link){display:none}}
@media(max-width:860px){:root{--sidebar:0px}.site-header{padding:0 10px;grid-template-columns:44px 1fr 44px;gap:6px}.menu-button{display:grid}.brand{justify-self:center}.brand span:last-child{display:none}.brand-mark{width:34px;height:34px}.search-trigger{width:44px;padding:0;justify-content:center;background:transparent;border-color:transparent}.search-trigger span,.search-trigger kbd{display:none}.header-actions{display:none}.app-layout{display:block}.lesson-sidebar{position:fixed;z-index:110;inset:0 auto 0 0;width:min(360px,calc(100% - 42px));height:100dvh;transform:translateX(-105%);transition:transform .22s ease;box-shadow:var(--shadow)}.sidebar-heading{position:sticky;z-index:2;top:-22px;height:64px;margin:-22px -14px 14px;padding:0 18px;background:rgb(247 249 251/.97);border-bottom:1px solid var(--line)}.sidebar-close{display:grid}.sidebar-scrim{position:fixed;z-index:100;inset:0;background:rgb(15 23 42/.48);border:0}.sidebar-open{overflow:hidden}.sidebar-open .lesson-sidebar{transform:none}.sidebar-open .sidebar-scrim{display:block}.lesson-main{padding:38px max(18px,5vw) 90px}}
@media(max-width:600px){:root{--top:56px;--course:44px}.site-header{height:56px}.course-strip{height:44px}.course-strip a{min-width:88px;padding:0 13px;font-size:12px}.lesson-header{padding-top:22px}.lesson-header h1{font-size:38px}.lesson-header>p{font-size:16px}.lesson-section{padding-top:44px}.lesson-section h2{font-size:26px}.lesson-section>p{font-size:16px}.objective-grid,.two-column{grid-template-columns:1fr}.objective-card{min-height:0}.lesson-actions{display:grid}.complete-button,.open-editor-button{width:100%}.lesson-directions{grid-template-columns:1fr}.lesson-direction.next{text-align:left}.code-shell{margin-right:-4px;margin-left:-4px}pre{padding:17px;font-size:12px}.search-dialog{width:calc(100% - 12px);max-height:calc(100dvh - 12px)}.quiz-card,.practice-card{padding:20px}}
@media(max-width:600px){.code-reading,.tradeoff-list{grid-template-columns:1fr}.code-reading article{min-height:0}.principle-lead{padding:20px;grid-template-columns:36px minmax(0,1fr);gap:12px}.principle-lead>span{width:34px;height:34px;border-radius:9px;font-size:18px}.principle-lead p{font-size:15px}.mechanism-flow li{padding-left:52px}.mechanism-flow li>span{width:38px;height:38px;border-width:5px}.mechanism-flow li:not(:last-child)::before{top:34px;left:18px}.debug-card{padding:20px}}
@media print{.site-header,.course-strip,.lesson-sidebar,.lesson-aside,.lesson-actions,.lesson-directions,.search-dialog,.toast{display:none!important}.app-layout{display:block}.lesson-main{padding:0}.lesson-main article{max-width:none}.code-shell{color:#000;background:#f3f4f6;border-color:#ccc;box-shadow:none}.code-toolbar{color:#333;background:#e5e7eb}.copy-button{display:none}pre{color:#000;white-space:pre-wrap}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important}}
.inline-code{padding:2px 5px;color:#0f55b5;background:#eaf3ff;border:1px solid #d2e4fa;border-radius:5px;font-size:.88em;overflow-wrap:anywhere}
.command-list{display:grid;gap:18px}.command-card{overflow:hidden;background:#fff;border:1px solid #ccd7e5;border-radius:15px;box-shadow:0 10px 30px rgb(30 50 75/.06)}.command-card>header{min-height:68px;padding:12px 16px 12px 20px;display:flex;align-items:center;justify-content:space-between;gap:16px;background:#17212f;border-bottom:1px solid #2b394d}.command-card>header span{display:block;color:#8fb8ed;font:800 9px/1.4 var(--mono);letter-spacing:.09em}.command-card>header h3{margin:3px 0 0;color:#fff;font:800 19px/1.3 var(--mono)}.command-card>header button{min-height:40px;padding:0 12px;color:#dbe7f5;background:#26364c;border:1px solid #3b4e69;border-radius:8px;cursor:pointer;font-size:11px}.command-card>header button:hover{background:#314662}.command-purpose,.command-syntax,.command-options,.command-example,.command-caution{padding:18px 20px}.command-card>div+div{border-top:1px solid var(--line)}.command-card>div>strong{display:block;margin-bottom:7px;color:#6a7b90;font-size:10px;letter-spacing:.06em}.command-purpose p,.command-caution p,.command-example>p{margin:0;color:#3d4f67;font-size:14px;line-height:1.75}.command-syntax{background:#f6f8fb}.command-syntax>code{display:block;padding:13px 15px;overflow-x:auto;color:#dbeafe;background:#111827;border-radius:9px;font:13px/1.65 var(--mono);white-space:pre}.command-option-list{display:grid;gap:8px}.command-option-list>div{padding:10px 12px;display:grid;grid-template-columns:minmax(95px,180px) minmax(0,1fr);gap:12px;background:#f8fafc;border:1px solid #e1e7ef;border-radius:9px}.command-option-list code{align-self:start;color:#0f55b5;font:700 12px/1.6 var(--mono);overflow-wrap:anywhere}.command-option-list p{margin:0;color:#4b5d73;font-size:12px;line-height:1.65}.command-example pre{margin:0 0 12px;padding:15px;color:#e6edf7;background:#0b111b;border-radius:9px;font:12px/1.65 var(--mono);white-space:pre-wrap}.command-example b{color:#1c2c42}.command-caution{background:#fff9ed}.command-caution strong{color:#92510b!important}.command-caution p{color:#654b2e}.command-empty{padding:24px;color:var(--muted);background:#f8fafc;border:1px dashed #c9d4e2;border-radius:12px;text-align:center}
@media(max-width:600px){.command-card>header{align-items:flex-start}.command-card>header h3{font-size:16px}.command-purpose,.command-syntax,.command-options,.command-example,.command-caution{padding:16px}.command-option-list>div{grid-template-columns:1fr;gap:4px}.command-card>header button{min-width:88px}}
.command-card>header button{min-height:44px}