:root{--brand:#0672cb;--deep:#071d49;--cyan:#00bceb;--ink:#1b2838;--muted:#61748a;--line:#dbe5ee;--bg:#f4f8fb;--white:#fff;--green:#127957}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.6 system-ui,-apple-system,Segoe UI,Arial,sans-serif}a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}button,input,textarea,select{font:inherit}button,.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;border:0;border-radius:9px;padding:10px 15px;background:var(--brand);color:white;cursor:pointer;font-weight:650;text-decoration:none}button:hover,.btn:hover{background:#045ca6;text-decoration:none}.btn.ghost,button.ghost{background:#e8f3fc;color:#09558d}.btn.outline{background:white;color:var(--brand);border:1px solid var(--line)}input,textarea,select{width:100%;padding:10px 12px;border:1px solid #c8d7e3;border-radius:9px;background:white;color:var(--ink)}textarea{min-height:120px}label{display:block;font-weight:650;margin:12px 0 5px}h1,h2,h3{line-height:1.25;color:var(--deep)}h1{font-size:clamp(27px,3vw,38px)}h2{font-size:23px}h3{font-size:17px}header{height:72px;background:white;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 clamp(18px,4vw,64px);gap:20px}header .logo{display:flex;align-items:center;gap:11px;color:var(--deep);font-weight:800;font-size:18px;letter-spacing:-.35px}header .dot{width:32px;height:32px;background:linear-gradient(135deg,#00bceb,#0672cb);border-radius:50% 50% 45% 45%}header nav{display:flex;gap:14px;align-items:center;flex-wrap:wrap}.container{max-width:1110px;padding:26px 22px;margin:auto}.hero{background:linear-gradient(112deg,#071d49,#075d9d);color:white;padding:48px 0}.hero h1{color:white;margin:0 0 10px}.hero p{color:#dbeeff;max-width:670px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px}.card{background:white;border:1px solid var(--line);border-radius:15px;padding:24px;box-shadow:0 4px 15px #06295808}.card h3{margin-top:0}.badge{display:inline-block;background:#e3f2fc;color:#075b91;font-size:12px;font-weight:750;padding:4px 10px;border-radius:999px}.badge.draft{background:#f2f0ea;color:#756443}.small,.muted{color:var(--muted);font-size:13px}.actions{display:flex;gap:8px;flex-wrap:wrap;align-items:center}.form-card{max-width:650px}.form-card form{margin:0}.notice{border-left:4px solid var(--cyan);background:#e8f7fd;padding:12px 16px;border-radius:6px;margin:16px 0}.error{background:#ffebe8;color:#912c21;padding:12px;border-radius:8px}.success{background:#e6f8ef;color:#13613c;padding:12px;border-radius:8px}.admin-list{display:grid;gap:12px}.item{padding:15px;border-radius:10px;border:1px solid var(--line);background:white;display:flex;justify-content:space-between;gap:14px;align-items:center}.split{display:grid;grid-template-columns:275px minmax(0,1fr);min-height:calc(100vh - 72px)}.sidebar{background:white;border-right:1px solid var(--line);padding:25px 18px}.sidebar .section{font-size:11px;color:var(--muted);letter-spacing:1.3px;font-weight:800;text-transform:uppercase;margin:23px 0 12px}.sidebar a{display:block;border-radius:9px;padding:9px 11px;color:#334963;margin:3px 0}.sidebar a.active{background:#e5f4fc;color:#075c9c;font-weight:750}.main{padding:34px clamp(20px,5vw,70px);max-width:1000px;width:100%}.eyebrow{font-size:12px;font-weight:850;letter-spacing:1.5px;text-transform:uppercase;color:var(--brand)}.progress{height:8px;background:#e3edf4;border-radius:99px;overflow:hidden}.progress>div{height:100%;background:linear-gradient(90deg,#00bceb,#0672cb)}.step-content{background:white;border:1px solid var(--line);padding:28px;border-radius:16px;margin:23px 0}.step-content img{max-width:100%;height:auto;border-radius:9px;border:1px solid var(--line);margin:12px 0}.step-content li{padding:3px 0}.step-nav{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}hr{border:0;border-top:1px solid var(--line);margin:24px 0}footer{padding:25px;text-align:center;color:var(--muted);font-size:12px}.html-editor{min-height:230px;padding:15px;border:1px solid #c8d7e3;border-radius:9px;background:white}.editor-toolbar{display:flex;gap:6px;margin:8px 0}.editor-toolbar button{padding:5px 11px}.codehint{font:12px monospace;color:#4a6681}@media(max-width:750px){header{height:auto;padding:16px;align-items:flex-start;flex-wrap:wrap}.split{grid-template-columns:1fr}.sidebar{border-bottom:1px solid var(--line);border-right:0}.main{padding:23px 16px}.field-grid{grid-template-columns:1fr}.item{align-items:flex-start;flex-direction:column}.step-content{padding:18px}}

/* V2 participant experience — Webex-inspired rounded UI, indigo/jade accents */
:root{--brand:#2466c9;--deep:#1a1d39;--cyan:#00a6b4;--ink:#252743;--muted:#777d93;--line:#e8eaf2;--bg:#f7f8fc;--green:#087d67}
body{font-family:Inter,"Segoe UI",system-ui,-apple-system,sans-serif}
header .dot{border-radius:40% 60% 55% 45%;background:conic-gradient(from 45deg,#21bfad,#008bba,#6655bf,#21bfad)}
.lab-app{display:grid;grid-template-columns:308px minmax(0,1fr);min-height:calc(100vh - 72px);background:#fafafe}
.lab-rail{background:#fff;border-right:1px solid #e9e9f2;padding:25px 16px 0;display:flex;flex-direction:column;min-height:calc(100vh - 72px)}
.rail-brand{display:flex;align-items:center;gap:10px;font-size:24px;color:#242440;font-weight:750;letter-spacing:-1.3px;padding:2px 12px 18px}
.rail-brand small{display:block;font-size:9px;font-weight:800;letter-spacing:1.9px;color:#898ba2;line-height:1.1}
.rail-mark{position:relative;width:33px;height:30px;display:inline-flex;align-items:center;justify-content:center}
.rail-mark i{position:absolute;width:20px;height:27px;border:6px solid #13b2ae;border-radius:50%;transform:rotate(42deg);left:2px}
.rail-mark i+ i{border-color:#6460c9;transform:rotate(-42deg);left:11px;opacity:.9}
.rail-divider{height:1px;background:#ebedf2;margin:0 12px 21px}.lab-type{margin-left:12px;align-self:flex-start;background:#eaf3ff;color:#3554b5;text-transform:uppercase;letter-spacing:1px;font-size:10px}
.rail-title{font-size:19px;line-height:1.35;margin:12px 12px 8px;letter-spacing:-.4px;color:#292a45}.rail-duration{display:flex;align-items:center;gap:7px;margin:0 12px;color:#84879e;font-size:13px}.rail-duration svg{width:15px}
.rail-progress{background:#f5f6fb;border:1px solid #eef0f7;margin:24px 6px 6px;padding:17px;border-radius:14px}.rail-progress-header{display:flex;align-items:center;justify-content:space-between;color:#80859b;font-size:10px;font-weight:750;letter-spacing:1px}.rail-progress-header strong{font-size:17px;letter-spacing:0;color:#323455}.rail-progress .progress{margin-top:11px;height:7px;background:#e3e5ef}.rail-progress .progress>div{background:linear-gradient(90deg,#04bfa5,#25a7d6,#6972df);transition:width .25s ease}.rail-progress p{font-size:12px;color:#8a8da0;margin:8px 0 0}
.step-list{padding:0 2px 24px;overflow:auto}.module-heading{margin:23px 10px 11px!important;display:flex;align-items:center;gap:9px;color:#5f657d!important;letter-spacing:.2px!important;font-size:11px!important;text-transform:none!important;font-weight:750!important}.module-num{border-radius:7px;background:#eeeefa;color:#5557a3;padding:3px 6px;font-size:10px}
.step-link{display:flex;align-items:flex-start;gap:11px;padding:10px 11px;margin:3px 0;color:#626780;font-size:13px;line-height:1.45;border-radius:11px;border:1px solid transparent;text-decoration:none}.step-link:hover{background:#f4f4fd;text-decoration:none}.step-link.active{color:#4037a6;background:#f0efff;border-color:#e6e2ff;font-weight:700}.step-label{flex:1}.step-indicator{flex:none;display:grid;place-items:center;border:1.5px solid #c8cada;width:20px;height:20px;border-radius:50%;margin-top:0;background:white}.step-indicator-dot{width:6px;height:6px;border-radius:50%;background:transparent}.step-indicator-check{display:none}.step-indicator-check svg{width:12px;height:12px;stroke-width:3}.step-link.active:not(.is-complete) .step-indicator{border-color:#5e5ac9}.step-link.active:not(.is-complete) .step-indicator-dot{background:#5e5ac9}.step-link.is-complete{color:#177d6c}.step-link.is-complete .step-indicator{border-color:#0ba88c;background:#0ba88c;color:white}.step-link.is-complete .step-indicator-dot{display:none}.step-link.is-complete .step-indicator-check{display:grid}.step-link.is-complete.active{color:#12685b;background:#e9f8f4;border-color:#d6f1e8}.rail-bottom{margin-top:auto;padding:20px 14px;display:flex;align-items:center;gap:9px;border-top:1px solid #eff0f6;color:#a0a2b1;font-size:11px}.rail-bottom svg{width:17px}
.lab-main{min-width:0}.lab-topbar{height:67px;border-bottom:1px solid #eeeeF5;background:#fff;display:flex;justify-content:space-between;align-items:center;padding:0 clamp(24px,5vw,75px)}.topbar-label{display:flex;gap:9px;align-items:center;font-size:11px;letter-spacing:1.3px;font-weight:800;color:#6a65be}.topbar-position{font-size:12px;font-weight:700;color:#9395a5}
.lab-workspace{max-width:1050px;padding:43px clamp(22px,5vw,76px) 75px;margin:0 auto}.lab-breadcrumb{display:flex;align-items:center;gap:9px;color:#767b9a;font-size:12px}.lab-breadcrumb svg{width:15px}.lab-breadcrumb .crumb-chevron svg{width:12px}.step-titlebar{display:flex;align-items:center;justify-content:space-between;gap:18px;margin:23px 0 25px}.step-kicker{letter-spacing:1.6px;color:#7470bf;font-size:11px;font-weight:800}.step-titlebar h1{font-size:clamp(28px,3vw,40px);letter-spacing:-1.3px;margin:8px 0 0;color:#252440}.step-state{display:inline-flex;align-items:center;gap:7px;padding:8px 12px;white-space:nowrap;border-radius:30px;background:#f2f2f8;color:#777991;font-size:12px;font-weight:700}.step-state.is-complete{background:#e2f8f0;color:#098168}.step-state svg{width:15px}
.objective-panel,.validation-panel{display:flex;align-items:flex-start;gap:15px;border-radius:15px;padding:20px 22px}.objective-panel{background:#eef2ff;border:1px solid #e3e7ff}.objective-panel strong{color:#313474}.objective-panel p,.validation-panel p{margin:5px 0 0;color:#656b86;font-size:14px}.panel-icon{width:38px;height:38px;border-radius:12px;flex:none;display:grid;place-items:center;background:#dedffc;color:#5654b4}.validation-panel{background:#eaf9f4;border:1px solid #d3f2e7;margin-top:26px}.validation-panel .panel-icon{color:#0a8a73;background:#d4f3e7}.validation-panel strong{color:#196956}.validation-panel p{color:#47796e}
.lab-workspace .step-content{margin:24px 0 20px;padding:30px 34px;box-shadow:0 12px 35px rgba(28,30,67,.035);border-color:#edeef5;border-radius:19px}.lab-workspace .step-content h2{font-size:19px;color:#302f50;display:flex;gap:10px;align-items:center;margin:0 0 22px}.lab-workspace .step-content h2 svg{color:#655fc3;width:21px}.instruction-body{color:#454a65;font-size:15px;line-height:1.9}.instruction-body ol,.instruction-body ul{padding-left:25px}.instruction-body li{padding-left:6px;margin:9px 0}.instruction-body li::marker{color:#645fc8;font-weight:800}
.screenshot-placeholder{margin:27px 0 0;border-radius:14px;border:1.5px dashed #d2d5e7;background:#fafbff;padding:32px;display:flex;align-items:center;justify-content:center;gap:15px;color:#888ca7}.screenshot-placeholder>svg{height:31px;width:31px}.screenshot-placeholder strong{color:#616685}.screenshot-placeholder p{font-size:13px;margin:3px 0}.screenshot-wrap{margin-top:28px}.screenshot-caption{font-size:10px;color:#8185a1;letter-spacing:1px;font-weight:800;display:flex;align-items:center;gap:7px}.screenshot-caption svg{width:15px}.screenshot-wrap img{width:100%;border:1px solid #e6e8f1;border-radius:12px;margin-top:12px}
.lab-workspace .step-nav{align-items:center;padding-top:7px}.lab-workspace .btn,.lab-workspace button{border-radius:11px;padding:12px 17px}.lab-workspace .btn svg,.lab-workspace button svg{width:17px}.lab-workspace .next-btn{background:#5a55bb}.lab-workspace .next-btn:hover{background:#4440a1}.complete-btn{background:#e8f7f2;color:#087d68}.complete-btn:hover,.complete-btn.is-complete{background:#07866e;color:#fff}
@media(max-width:930px){.lab-app{grid-template-columns:240px minmax(0,1fr)}.rail-title{font-size:17px}.step-titlebar{align-items:flex-start;flex-direction:column}.lab-workspace{padding:28px 23px 55px}}
@media(max-width:700px){.lab-app{display:block}.lab-rail{min-height:0;border-right:0;border-bottom:1px solid #e9e9f2;padding:16px}.rail-brand{padding-bottom:10px}.rail-progress{margin:12px 4px}.step-list{max-height:265px;overflow:auto}.rail-bottom{display:none}.lab-topbar{height:52px;padding:0 20px}.lab-workspace{padding:22px 17px 48px}.lab-workspace .step-content{padding:21px 17px}.step-titlebar h1{font-size:27px}.lab-workspace .step-nav{justify-content:center}.lab-workspace .step-nav>span:empty{display:none}}

/* Guided module journey — only one visible group at a time */
.lab-module{border:1px solid #ebedf4;background:#fff;border-radius:14px;margin:9px 4px;overflow:hidden;transition:border-color .2s,background-color .2s}
.lab-module.module-open{border-color:#dcdcf5;background:#fdfcff;box-shadow:0 2px 12px rgba(39,40,83,.045)}
.module-toggle{display:flex;align-items:center;gap:9px;width:100%;min-height:57px;padding:10px 12px;background:transparent;border:0;color:#30334e;text-align:left;cursor:pointer;font:inherit}
.module-toggle .module-title{flex:1;font-size:12px;line-height:1.4;font-weight:750}
.module-toggle .module-state,.module-chevron{color:#81879d;display:grid;place-items:center}
.module-toggle .module-state svg,.module-toggle .module-chevron svg{width:16px;height:16px}
.module-toggle .module-chevron svg{transition:transform .2s}
.module-open .module-chevron svg{transform:rotate(90deg)}
.module-complete .module-state{color:#079b7c}
.module-locked{background:#f7f8fb;border-color:#f0f1f6}
.module-locked .module-toggle{opacity:.56;cursor:not-allowed}
.module-steps{display:none;padding:0 7px 9px}
.module-open .module-steps{display:block}
.lab-module .module-num{margin:0;flex:none}
.next-btn.next-locked{opacity:.4;cursor:not-allowed;filter:grayscale(1)}
@media(max-width:700px){.module-toggle{min-height:48px}.lab-module{margin:6px 1px}}

/* V4: Webex brand asset, adaptive canvas, expandable history, light/dark toggle */
.lab-app{--lab-bg:#fafafe;--lab-surface:#fff;--lab-panel:#fff;--lab-text:#252440;--lab-copy:#454a65;--lab-muted:#767b9a;--lab-border:#e9e9f2;--lab-soft:#f4f5fb;--lab-highlight:#eef2ff;--lab-accent:#5a55bb;background:var(--lab-bg);color:var(--lab-text);grid-template-columns:clamp(260px,21vw,345px) minmax(0,1fr)}
.lab-rail{background:var(--lab-surface);border-color:var(--lab-border)}
.rail-brand{gap:12px;flex-wrap:wrap;padding:6px 12px 19px}
.webex-logo{display:block;width:110px;max-height:49px;height:auto;object-fit:contain;object-position:left center}
.rail-brand-caption{font-size:10px;letter-spacing:1.1px;font-weight:750;color:var(--lab-muted);white-space:nowrap}
.lab-main{min-width:0;width:100%;background:var(--lab-bg)}
.lab-workspace{width:100%;max-width:none;padding:clamp(24px,3vw,54px) clamp(20px,4vw,82px) 78px;overflow-wrap:anywhere}
.lab-workspace .step-content,.objective-panel,.validation-panel{width:100%;min-width:0}
.instruction-body{overflow-wrap:anywhere;color:var(--lab-copy)}
.instruction-body pre,.instruction-body code{white-space:pre-wrap;overflow-wrap:anywhere}
.instruction-body table{display:block;max-width:100%;overflow-x:auto}
.instruction-body iframe,.instruction-body video,.instruction-body img{max-width:100%}
.lab-topbar{background:var(--lab-surface);border-color:var(--lab-border);padding:0 clamp(20px,4vw,82px)}
.topbar-actions{display:flex;align-items:center;gap:16px}
.lab-app .theme-toggle{background:var(--lab-soft);border:1px solid var(--lab-border);color:var(--lab-text);border-radius:999px;padding:8px 12px;font-size:12px;font-weight:700;cursor:pointer;display:inline-flex;align-items:center;gap:7px}
.lab-app .theme-toggle:hover{background:var(--lab-highlight)}
.theme-toggle svg{width:16px;height:16px}
.lab-module,.lab-module.module-open{background:var(--lab-surface);border-color:var(--lab-border)}
.lab-module.module-open{background:var(--lab-panel)}
.module-toggle{color:var(--lab-text)}
.module-complete:not(.module-open) .module-toggle{opacity:1}
.module-complete .module-toggle:hover{background:var(--lab-soft)}
.module-locked{background:var(--lab-soft)}
.lab-app[data-theme="dark"]{--lab-bg:#111722;--lab-surface:#1a2331;--lab-panel:#202b3b;--lab-text:#f0f4fa;--lab-copy:#dae2ed;--lab-muted:#a7b5c7;--lab-border:#334154;--lab-soft:#273345;--lab-highlight:#34385b;--lab-accent:#aaa8ff}
.lab-app[data-theme="dark"] .rail-title,.lab-app[data-theme="dark"] .rail-brand,.lab-app[data-theme="dark"] .step-titlebar h1,.lab-app[data-theme="dark"] .lab-workspace .step-content h2,.lab-app[data-theme="dark"] .rail-progress-header strong{color:var(--lab-text)}
.lab-app[data-theme="dark"] .rail-progress,.lab-app[data-theme="dark"] .lab-workspace .step-content,.lab-app[data-theme="dark"] .screenshot-placeholder{background:var(--lab-panel);border-color:var(--lab-border);color:var(--lab-muted)}
.lab-app[data-theme="dark"] .step-content,.lab-app[data-theme="dark"] .module-toggle,.lab-app[data-theme="dark"] .step-link,.lab-app[data-theme="dark"] .rail-duration,.lab-app[data-theme="dark"] .lab-breadcrumb,.lab-app[data-theme="dark"] .topbar-position{color:var(--lab-copy)}
.lab-app[data-theme="dark"] .step-link:hover{background:#2c3b52}
.lab-app[data-theme="dark"] .step-link.active{background:#34335a;color:#dcd8ff;border-color:#575485}
.lab-app[data-theme="dark"] .step-link.is-complete{color:#75dfc1}
.lab-app[data-theme="dark"] .step-link.is-complete.active{background:#20473e;border-color:#386f60}
.lab-app[data-theme="dark"] .step-indicator{background:#273345;border-color:#64758b}
.lab-app[data-theme="dark"] .step-link.is-complete .step-indicator{background:#0ba88c;border-color:#0ba88c}
.lab-app[data-theme="dark"] .objective-panel{background:#292e53;border-color:#454979}
.lab-app[data-theme="dark"] .objective-panel strong{color:#e3e4ff}
.lab-app[data-theme="dark"] .objective-panel p{color:#cbd0ef}
.lab-app[data-theme="dark"] .validation-panel{background:#193d36;border-color:#2f6455}
.lab-app[data-theme="dark"] .validation-panel strong{color:#a7f1db}
.lab-app[data-theme="dark"] .validation-panel p{color:#b9ddcf}
.lab-app[data-theme="dark"] .step-state{background:#29364a;color:#d2d8e4}
.lab-app[data-theme="dark"] .step-state.is-complete{background:#1b483d;color:#8df0cd}
.lab-app[data-theme="dark"] .lab-module.module-locked{background:#202937}
.lab-app[data-theme="dark"] .rail-progress p,.lab-app[data-theme="dark"] .screenshot-placeholder strong{color:var(--lab-muted)}
.lab-app[data-theme="dark"] .rail-progress .progress{background:#344357}
.lab-app[data-theme="dark"] .rail-divider,.lab-app[data-theme="dark"] .rail-bottom{border-color:var(--lab-border);background:transparent}
.lab-app[data-theme="dark"] .lab-workspace .btn.outline{background:var(--lab-surface);border-color:var(--lab-border);color:#c5d4fa}
.lab-app[data-theme="dark"] .module-num{background:#3a3c68;color:#e1e0ff}
.lab-app[data-theme="dark"] .lab-type{background:#283d61;color:#bbd6ff}
@media(max-width:950px){.lab-app{grid-template-columns:245px minmax(0,1fr)}.lab-workspace{padding:26px 22px 56px}}
@media(max-width:700px){.lab-app{display:block}.lab-rail{min-height:0}.lab-topbar{padding:0 15px}.topbar-actions{gap:9px}.lab-workspace{padding:20px 15px 44px}.lab-app .theme-toggle{padding:7px 9px}.rail-brand{padding:0 6px 12px}.lab-workspace .step-content{padding:20px 16px}}
@media(max-width:400px){.topbar-position{display:none}}