@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;450;500;550;600;650;700&family=Manrope:wght@400;500;600;650;700;750;800&display=swap');
:root{color-scheme:dark;--bg:#0b111b;--panel:#111a27;--panel2:#151f2e;--line:#263244;--text:#eef4fb;--muted:#99a9be;--mint:#62e5bc;--amber:#f3bd69;--blue:#799dff}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:16px 'DM Sans',sans-serif}button,a{ -webkit-tap-highlight-color:transparent}button{font:inherit;color:inherit;cursor:pointer}button:focus-visible,a:focus-visible{outline:2px solid var(--mint);outline-offset:5px}button{border:0}a{color:var(--mint)}.sidebar{width:246px;position:fixed;inset:0 auto 0 0;border-right:1px solid var(--line);padding:30px 20px;display:flex;flex-direction:column;background:#0e1520}.brand{font:800 27px Manrope,sans-serif;color:var(--text);text-decoration:none;letter-spacing:-1px;display:flex;align-items:center}.brand-icon{font-size:22px;color:#061813;background:var(--mint);width:33px;height:36px;border-radius:9px;display:grid;place-items:center;margin-right:10px}.brand-dot{color:var(--mint)}.workspace{padding:24px 4px 28px;border-bottom:1px solid var(--line);margin-bottom:25px}.mini-label,.nav-label{font-size:12px;font-weight:700;letter-spacing:1.7px;color:var(--muted)}.workspace strong{display:block;font-size:15px;margin:13px 0 7px}.workspace strong span{float:right}.workspace small{font-size:12px;color:var(--muted)}.nav-label{margin:0 12px 14px}nav button{display:flex;align-items:center;width:100%;text-align:left;border-radius:7px;background:transparent;color:var(--muted);padding:13px 12px;margin:5px 0;font-size:14px;font-weight:600;gap:12px}nav button>span{font-size:21px;width:23px}nav button.active{color:var(--mint);background:#17332f}nav button:hover{background:#1c2a37}nav b{font-size:12px;background:#443423;color:var(--amber);padding:2px 6px;border-radius:4px;margin-left:auto}.sidebar-bottom{margin-top:auto;padding-top:40px}.lesson-promo{padding:17px 13px;border:1px solid #2c3c4b;border-radius:9px;background:linear-gradient(145deg,#192a35,#111925)}h3{font-family:Manrope,sans-serif;font-size:17px;line-height:1.5;margin:12px 0}.lesson-promo button{padding:0;font-size:12px;background:none;color:var(--mint);text-align:left}.author{display:flex;align-items:center;gap:10px;margin:25px 3px 0}.avatar{background:#283444;color:#c4d2e5;border-radius:50%;padding:10px;font-size:13px}.author strong{display:block;font-size:14px}.author small{font-size:12px;color:var(--muted)}.shell{margin-left:246px}header{height:78px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 36px;font-size:14px}.breadcrumb{color:var(--muted)}.breadcrumb span{margin:0 15px;color:#526479}.breadcrumb strong{font-weight:500;color:var(--text)}.header-right{display:flex;gap:22px;align-items:center}.demo{font-size:11px;font-weight:700;letter-spacing:1.1px;border:1px solid #3b4654;padding:7px 10px;border-radius:5px;color:#c1cdda}.demo i{display:inline-block;width:6px;height:6px;background:var(--blue);border-radius:50%;margin-right:7px}.quiet{background:transparent;color:var(--muted);font-size:13px;padding:8px}main{max-width:1570px;margin:auto;padding:34px 36px 25px}.page-heading{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:27px}h1{font:750 30px Manrope,sans-serif;letter-spacing:-1px;margin:8px 0}p{line-height:1.65;color:var(--muted);margin:7px 0}.page-heading p{font-size:14px}.primary{background:var(--mint);color:#0a221c;border-radius:6px;padding:12px 17px;font-size:14px;font-weight:700}.secondary{background:#1b293a;border:1px solid #35465b;border-radius:6px;padding:11px 15px;font-size:14px}.status-bar{display:flex;gap:13px;align-items:center;background:#102820;border:1px solid #285344;border-radius:8px;padding:14px 18px;font-size:14px;color:#b0dacb}.status-bar strong{color:var(--mint)}.status-bar small{margin-left:auto;color:#9cb9ad;font-size:12px}.status-dot{width:8px;height:8px;background:var(--mint);border-radius:50%;box-shadow:0 0 15px #62e5bc60}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:22px 0}.stat{padding:20px;background:var(--panel);border:1px solid var(--line);border-radius:9px;position:relative;overflow:hidden}.stat label{font-size:14px;color:#b3c1d1}.stat .value{font:700 33px Manrope,sans-serif;margin:12px 0 7px;letter-spacing:-1px}.stat .value small{font:500 17px 'DM Sans';color:var(--muted);letter-spacing:0}.stat .note{font-size:12px;color:var(--muted)}.stat .note em{font-style:normal;color:var(--mint)}.spark{position:absolute;width:85px;height:34px;right:16px;bottom:23px;opacity:.75}.grid{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(280px,1fr);gap:21px}.panel{background:var(--panel);border:1px solid var(--line);border-radius:10px;overflow:hidden}.panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:20px 22px 0}.panel-head h2{font:700 17px Manrope,sans-serif;margin:0}.panel-head small{font-size:12px;color:var(--muted)}.panel-copy{padding:0 22px;font-size:13px;margin-top:7px}.text-button{background:none;color:var(--mint);padding:0;font-size:13px}.flow{padding:27px 22px 20px}.flow-label{font-size:11px;letter-spacing:1.7px;color:var(--muted);margin:0 0 10px}.flow-row{display:flex;align-items:center;gap:0}.node{flex:1;min-width:0;background:#182434;border:1px solid #35485b;border-radius:7px;padding:13px 5px;color:#dce9f6;text-align:center}.node:hover{border-color:var(--mint);transform:translateY(-2px)}.node .symbol{display:block;color:var(--mint);font-size:24px;height:30px}.node strong{font-size:13px;display:block;margin:6px 0}.node small{font-size:11px;color:var(--muted);display:block}.connector{width:20px;height:1px;background:var(--mint);position:relative;flex-shrink:0}.connector:after{content:'›';position:absolute;right:-1px;top:-12px;color:var(--mint)}.backup-row{display:flex;align-items:center;gap:12px;margin:16px 0 22px;font-size:12px;color:var(--muted)}.backup-row button{background:#24283a;color:#c5bef2;border:1px solid #44415c;border-radius:5px;padding:8px 12px;font-size:12px}.flow-foot{display:flex;gap:20px;border-top:1px solid var(--line);padding-top:16px;font-size:12px;color:var(--muted)}.flow-foot b{color:var(--mint);font-weight:500}.attention-item{display:flex;gap:12px;padding:20px 22px;border-bottom:1px solid var(--line)}.alert-icon{height:30px;width:30px;flex-shrink:0;display:grid;place-items:center;border-radius:7px;background:#3a3025;color:var(--amber)}.attention-item h3{margin:0 0 6px;font:600 14px 'DM Sans'}.attention-item p{font-size:13px;line-height:1.5;margin:4px 0 10px}.tag{font-size:11px;padding:4px 7px;border-radius:4px;background:#382e22;color:var(--amber);display:inline-block}.tag.green{color:var(--mint);background:#16342d}.alert-meta{display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--muted);gap:10px}.attention-bottom{padding:14px 22px;font-size:12px;color:var(--muted)}.bottom-grid{margin-top:22px;display:grid;grid-template-columns:1.1fr 1fr;gap:21px}.hall{padding:20px 22px;display:flex;gap:17px}.racks{display:grid;grid-template-columns:repeat(8,1fr);gap:7px;flex:1}.rack{border:1px solid #345847;border-radius:4px;background:#15342b;color:#89cfb4;font-size:11px;padding:10px 2px;text-align:center;min-width:0}.rack.warn{background:#3c3021;border-color:#755b32;color:var(--amber)}.rack:before{content:'▰\A▰\A▰';white-space:pre;display:block;font-size:17px;line-height:11px;margin-bottom:7px}.legend{display:flex;gap:19px;font-size:12px;color:var(--muted);padding:0 22px 18px}.legend span:first-child{color:var(--mint)}.chart{padding:14px 22px 10px}.chart svg{display:block;width:100%;height:116px}.chart-labels{display:flex;justify-content:space-between;font-size:11px;color:var(--muted);padding:0 3px 6px}.learn-strip{display:flex;align-items:center;gap:20px;border:1px solid #334750;background:linear-gradient(100deg,#162d32,#15202d);border-radius:9px;padding:20px 23px;margin-top:22px}.learn-strip .lesson-icon{font-size:27px;color:var(--mint)}.learn-strip h3{font-size:15px;margin:0 0 4px}.learn-strip p{font-size:13px;margin:0}.learn-strip button{margin-left:auto;white-space:nowrap}footer{display:flex;justify-content:space-between;gap:15px;padding:13px 36px 25px;font-size:11px;color:#7f91a7}.system-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.system-card{padding:23px;text-align:left;background:var(--panel);border:1px solid var(--line);border-radius:9px}.system-card:hover{border-color:var(--mint)}.system-card .symbol{color:var(--mint);font-size:28px}.system-card h2{font:700 18px Manrope;margin:14px 0 8px}.system-card p{font-size:14px;min-height:68px}.system-card .more{display:block;font-size:13px;color:var(--mint);margin-top:15px}.lesson-list{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.lesson-card{padding:25px}.lesson-card .number{font:700 35px Manrope;color:#557b80}.lesson-card p{font-size:14px;min-height:75px}.lesson-card button{margin-top:20px}.source-panel{padding:24px;margin-top:22px}.source-panel h2{font-size:18px;margin-top:0}.source-panel p,.source-panel a{font-size:14px}dialog{background:#121d2b;color:var(--text);border:1px solid #405467;border-radius:14px;max-width:620px;width:calc(100% - 32px);max-height:90vh;padding:30px;box-shadow:0 40px 100px #0009}dialog::backdrop{background:#020812c9;backdrop-filter:blur(5px)}.dialog-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px}.close{background:#263547;border-radius:50%;font-size:22px;width:34px;height:34px}dialog h2{font:700 26px Manrope;letter-spacing:-.6px;margin:15px 0}dialog h3{font-size:15px;color:var(--mint);margin:22px 0 8px}dialog p,dialog li{font-size:15px;line-height:1.7;color:#b9c7d8}dialog ul{padding-left:20px}.metric-row{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:20px 0}.metric-row div{background:#1a2b3d;border:1px solid var(--line);padding:15px;border-radius:7px}.metric-row strong{display:block;font-size:20px}.metric-row small{display:block;color:var(--muted);font-size:12px;margin-top:5px}.callout{padding:15px;background:#19352f;border-left:3px solid var(--mint);border-radius:3px;margin:22px 0;font-size:14px;line-height:1.6;color:#bfe3d6}.answer{display:block;width:100%;background:#1b2b3d;border:1px solid #3b5067;border-radius:7px;padding:15px;text-align:left;margin:10px 0;font-size:14px;line-height:1.5}.answer:hover{border-color:var(--mint)}.feedback{padding:15px;background:#183e32;border-radius:6px;margin:15px 0;font-size:14px;line-height:1.6}.feedback.incorrect{background:#463424}.progress{height:4px;background:#2b394a;margin:15px 0 24px;border-radius:4px}.progress span{display:block;height:100%;background:var(--mint)}.incident-list .attention-item{background:var(--panel);margin-bottom:15px;border:1px solid var(--line);border-radius:9px}.incident-list .attention-item>div:last-child{flex:1}.incident-list .attention-item h3{font-size:17px}.incident-list .attention-item p{font-size:15px}.ack{background:#273848;color:#dce8f2;border:1px solid #456077;border-radius:5px;padding:7px 10px;font-size:12px}.empty{padding:40px}.muted{color:var(--muted)}@media(min-width:1550px){main{padding-top:42px}.stat{padding:24px}.flow{padding-top:35px;padding-bottom:28px}.node{padding:20px 7px}.chart svg{height:140px}}@media(max-width:1150px){.sidebar{width:205px;padding:25px 13px}.shell{margin-left:205px}main{padding:25px 22px}.brand{font-size:23px}header{padding:0 22px}.grid,.bottom-grid{grid-template-columns:1fr}.stats{gap:10px}.stat{padding:16px}.stat .value{font-size:28px}.spark{display:none}.system-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:760px){.sidebar{position:static;width:auto;padding:18px}.brand{font-size:25px}.workspace,.nav-label,.sidebar-bottom{display:none}nav{display:flex;margin-top:15px;gap:5px;overflow:auto}nav button{white-space:nowrap;justify-content:center;width:auto;padding:10px;flex:1;font-size:12px}nav button>span,nav b{display:none}.shell{margin-left:0}header{height:58px;padding:0 18px}.breadcrumb{display:none}.header-right{width:100%;justify-content:space-between}main{padding:22px 16px}.page-heading{align-items:flex-start;flex-wrap:wrap}h1{font-size:27px}.stats{grid-template-columns:repeat(2,1fr)}.stat label{font-size:13px}.stat .note{font-size:11px}.status-bar{align-items:flex-start;line-height:1.5}.status-bar small{display:none}.system-grid,.lesson-list{grid-template-columns:1fr}.system-card p,.lesson-card p{min-height:0}.flow{padding:22px 12px}.node strong{font-size:11px}.node small{font-size:10px}.connector{width:12px}.panel-head{padding:20px 16px 0}.learn-strip{flex-wrap:wrap}.learn-strip button{margin-left:0}.learn-strip .lesson-icon{display:none}.racks{gap:4px}.hall{padding:20px 12px}.rack{font-size:10px}.flow-foot{gap:12px;font-size:11px}footer{padding:10px 17px 25px;flex-direction:column}.backup-row{flex-wrap:wrap}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
/* Native modal keeps keyboard focus in the tutorial; the background remains read-only. */
#app-tour{position:fixed;inset:0;margin:0;width:100%;height:100%;max-width:none;max-height:none;padding:0;border:0;border-radius:0;background:transparent;overflow:hidden;box-shadow:none;color:var(--text)}
#app-tour::backdrop{background:transparent;backdrop-filter:none}.tour-spotlight{position:fixed;border:2px solid var(--mint);border-radius:12px;box-shadow:0 0 0 9999px #030912c9;pointer-events:none}.tour-card{position:fixed;right:24px;bottom:24px;width:410px;max-width:calc(100vw - 32px);max-height:calc(100dvh - 32px);overflow:auto;background:#142131;border:1px solid #4d6c7d;border-radius:14px;padding:24px;box-shadow:0 20px 70px #0008}.tour-card-left{right:auto;left:24px}.tour-welcome{background:#030912c9!important}.tour-welcome .tour-card{right:auto;left:50%;bottom:auto;top:50%;transform:translate(-50%,-50%);width:460px}.tour-top{display:flex;align-items:center;justify-content:space-between;gap:10px}.tour-top .quiet{font-size:25px;line-height:1;padding:4px 8px}.tour-progress{display:flex;gap:5px;margin:15px 0 23px}.tour-progress span{height:3px;flex:1;background:#34465b;border-radius:3px}.tour-progress .filled{background:var(--mint)}#app-tour h2{font:750 25px/1.25 Manrope,sans-serif;letter-spacing:-.5px;margin:0 0 14px;outline:none}#app-tour p{font-size:15px;line-height:1.65;margin:0}.tour-task{font-size:14px;line-height:1.6;background:#1c3837;color:#c6e5dc;border-left:2px solid var(--mint);padding:12px;margin:20px 0}.tour-actions{display:flex;justify-content:space-between;align-items:center;gap:8px}.tour-actions>div{display:flex;gap:8px}.tour-actions .quiet{padding-left:0}.tour-practice{margin-top:20px;padding:4px 0;font-size:14px}.header-right{gap:12px}#tour-button{color:var(--mint);white-space:nowrap}@media(max-width:760px){.tour-card,.tour-card-left{left:16px;right:16px;bottom:16px;width:auto;padding:19px}.tour-welcome .tour-card{left:50%;right:auto;width:calc(100vw - 32px)}#app-tour h2{font-size:22px}.tour-task{margin:14px 0}.tour-progress{margin:10px 0 16px}.header-right{gap:6px}.header-right .demo{font-size:9px;padding:7px}.header-right .quiet{font-size:12px;padding:6px 3px}}@media(max-height:600px){.tour-card{padding:16px}.tour-progress{margin:8px 0}.tour-task{margin:10px 0}}
.breadcrumb{display:flex;align-items:center}.breadcrumb #crumb{cursor:default}#workspace-menu{position:relative}#workspace-menu summary{list-style:none;cursor:pointer;color:#c5d4e5;padding:9px 0}#workspace-menu summary::-webkit-details-marker{display:none}#workspace-menu summary>span{margin:0 0 0 5px;color:var(--mint)}#workspace-menu summary:focus-visible{outline:2px solid var(--mint);outline-offset:4px;border-radius:4px}.workspace-options{position:absolute;top:42px;left:0;z-index:10;width:205px;background:#172334;border:1px solid #3a4d62;border-radius:8px;padding:6px;box-shadow:0 15px 35px #0007}.workspace-options button{display:block;width:100%;text-align:left;background:transparent;border-radius:4px;padding:11px 12px;font-size:14px}.workspace-options button:hover{background:#254337;color:var(--mint)}@media(max-width:760px){header{height:auto;min-height:58px;flex-wrap:wrap;padding-top:8px;padding-bottom:8px;gap:5px}.breadcrumb{font-size:12px;width:100%}.breadcrumb>span{margin:0 10px}.header-right{width:100%}.workspace-options{top:34px}}
.learning-start{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:22px 24px;margin:0 0 24px;border:1px solid #43836f;border-radius:10px;background:linear-gradient(110deg,#183b32,#142433)}.learning-start h2{font:750 21px/1.35 Manrope,sans-serif;margin:8px 0}.learning-start p{font-size:14px;max-width:720px;margin:6px 0}.learning-start button{flex-shrink:0}.learning-notice{color:var(--mint)!important;font-size:14px!important;padding:12px 14px;background:#1a3c32;border-radius:6px;margin:0 0 16px!important}.next-lesson{border-color:var(--mint);box-shadow:inset 0 3px var(--mint)}@media(max-width:760px){.learning-start{align-items:flex-start;flex-direction:column;padding:18px;gap:12px}.learning-start button{width:100%}}