:root{
  --red:#ee0000; --red2:#b00000; --dark:#111; --dark2:#151719; --panel:#1e2226;
  --white:#fff; --muted:#6b7280; --line:#d8dde3; --green:#22a447; --blue:#2b7de9;
}
*{box-sizing:border-box} html,body{margin:0;height:100%;font-family:Inter,Arial,Helvetica,sans-serif;background:#f4f5f7;color:#111;overflow-x:hidden}
button,input{font:inherit} button{cursor:pointer}
.app{display:grid;grid-template-columns:320px 1fr;min-height:100vh;width:100%}
.sidebar{background:linear-gradient(180deg,#111518,#07090b);color:#fff;border-right:1px solid #2a2f33;position:sticky;top:0;height:100vh;padding:18px 18px 24px;display:flex;flex-direction:column;z-index:20}
.brand{display:flex;align-items:center;gap:14px;padding-bottom:22px;border-bottom:1px solid #2a2f33}.logo{width:58px;height:58px;border-radius:50%;background:var(--red);border:3px solid #fff;display:grid;place-items:center;font-weight:900;font-size:24px;box-shadow:0 0 0 4px rgba(238,0,0,.18)}.brand h1{font-size:18px;margin:0;line-height:1.05}.brand p{font-size:13px;margin:4px 0 0;color:#cfd3d8}.side-title{color:#ff2f2f;font-weight:900;font-size:13px;letter-spacing:.7px;margin:28px 0 14px}.modules{display:flex;flex-direction:column;gap:8px;overflow:auto;padding-right:2px}.module{display:flex;align-items:center;gap:12px;border:1px solid #2c3137;background:rgba(255,255,255,.055);color:#ddd;border-radius:8px;padding:12px 11px;text-align:left;font-weight:800;font-size:14px}.module small{margin-left:auto;color:#9aa1aa}.module.done small{color:var(--green)}.module.active{background:linear-gradient(90deg,var(--red),#d91515);color:#fff;border-color:#ff3232;box-shadow:0 8px 24px rgba(238,0,0,.25)}.progressbox{margin-top:auto;border-top:1px solid #2a2f33;padding-top:24px}.bar{height:8px;background:#d5d7da;border-radius:999px;overflow:hidden}.bar span{display:block;height:100%;background:var(--red);width:0%}.progress-row{display:flex;justify-content:space-between;margin-top:12px;color:#e9e9e9;font-weight:800}.footer{font-size:12px;color:#a1a7ad;margin-top:28px;line-height:1.6}.main{min-width:0}.topbar{height:82px;background:#0d0f11;color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 28px 0 36px;border-bottom:1px solid #2a2f33;position:sticky;top:0;z-index:10}.version{display:flex;align-items:center;gap:18px}.badge{background:var(--red);padding:9px 18px;border-radius:7px;color:#fff;font-weight:900}.version-title{font-weight:900}.nav{display:flex;gap:28px;align-items:center;font-weight:900}.nav a{color:#fff;text-decoration:none}.nav a.active{color:#ff3131}.user{display:flex;align-items:center;gap:10px}.hero{background:radial-gradient(circle at 68% 30%,rgba(238,0,0,.45),transparent 30%),linear-gradient(135deg,#320000,#780000 55%,#2a0000);display:grid;grid-template-columns:1.1fr .9fr;gap:38px;padding:34px 54px 0;min-height:430px;color:#fff;position:relative}.hero:after{content:"";position:absolute;inset:auto 0 0;height:1px;background:#d9d9d9}.eyebrow{color:#ffb1b1;font-weight:900;font-size:12px;letter-spacing:.7px}.hero h2{font-size:46px;line-height:1.04;margin:18px 0 18px;max-width:720px}.hero p{font-size:18px;line-height:1.55;max-width:780px}.hero-actions{display:flex;gap:16px;margin-top:26px}.btn{border:0;border-radius:8px;background:var(--red);color:#fff;padding:13px 20px;font-weight:900;box-shadow:0 10px 20px rgba(238,0,0,.25)}.btn.secondary{background:transparent;border:1px solid rgba(255,255,255,.55);box-shadow:none}.lab-card{align-self:center;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.25);border-radius:10px;padding:18px;box-shadow:0 14px 36px rgba(0,0,0,.25)}.lab-card h3{margin:0 0 14px;font-size:24px}.diagram{background:#141719;border-radius:8px;padding:12px}.layer{border:1px solid #454b52;border-left:5px solid var(--red);border-radius:8px;padding:14px 16px;margin-bottom:8px;background:#1e2226}.layer.worker{border-left-color:#36b34a}.flow{display:flex;align-items:center;justify-content:space-between;margin-top:14px}.pill{background:var(--red);color:#fff;border-radius:999px;padding:11px 18px;font-weight:900}.mini-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:14px}.mini{background:#fff;color:#111;border-radius:7px;padding:14px;font-weight:900}.mini small{display:block;color:#454545;font-weight:500;margin-top:4px}.content{padding:16px 48px 44px;margin-top:-2px}.grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:12px}.card{background:#fff;border:1px solid #d9dde3;border-radius:8px;padding:18px;box-shadow:0 6px 16px rgba(0,0,0,.04)}.section-title{margin:0 0 14px;font-size:22px;display:flex;align-items:center;gap:10px}.red-label{font-size:12px;letter-spacing:.7px;color:var(--red);font-weight:900}.name-form{display:flex;gap:12px;margin-top:16px}.name-form input{flex:1;padding:15px 16px;border:1px solid #ccd1d7;border-radius:7px}.outline{background:#fff;color:var(--red);border:1px solid var(--red);box-shadow:none}.progress-summary{display:grid;grid-template-columns:160px 1fr;gap:18px;align-items:center}.circle{width:120px;height:120px;border-radius:50%;background:conic-gradient(var(--green) 0deg 104deg,#e0e2e5 104deg 360deg);display:grid;place-items:center}.circle div{background:#fff;width:82px;height:82px;border-radius:50%;display:grid;place-items:center;font-size:25px;font-weight:900}.legend{font-size:14px;line-height:2}.dot{display:inline-block;width:11px;height:11px;border-radius:50%;margin-right:8px;background:#999}.dot.green{background:var(--green)}.dot.blue{background:var(--blue)}.next{display:flex;align-items:center;justify-content:space-between;gap:16px}.next-icon{color:var(--red);font-size:42px;font-weight:900}.terminal-card{min-height:540px}.terminal-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.terminal{background:#050505;color:#f4f4f4;border-radius:5px;min-height:395px;padding:16px;font-family:Menlo,Consolas,monospace;font-size:13px;line-height:1.45;white-space:pre-wrap;overflow:auto}.prompt{color:#36b34a}.quick{display:flex;gap:12px;flex-wrap:wrap;margin-top:14px}.quick button{background:#fff;border:1px solid #cfd4dc;border-radius:7px;padding:10px 14px;font-weight:800}.tip{margin-top:16px;border:1px solid #9fc6ff;background:#edf6ff;color:#1a61b8;border-radius:6px;padding:13px 16px;display:flex;justify-content:space-between;gap:12px;align-items:center}.lab-panel,.modules-panel{display:none}.chapter-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.chapter{border:1px solid #d8dde3;border-radius:8px;padding:16px;background:#fff}.chapter h4{margin:0 0 8px}.code{background:#0b0b0b;color:#fff;border-radius:6px;padding:12px;font-family:Menlo,monospace;margin:10px 0;white-space:pre-wrap}.run{background:var(--red);color:white;border:0;border-radius:6px;padding:9px 13px;font-weight:900}.status-msg{margin-top:10px;color:var(--green);font-weight:900;display:none}.show{display:block}.hidden{display:none!important}
@media(max-width:1100px){.app{grid-template-columns:1fr}.sidebar{position:relative;height:auto}.hero{grid-template-columns:1fr;padding:28px}.content{padding:18px}.grid{grid-template-columns:1fr}.topbar{position:relative}.nav{display:none}.hero h2{font-size:36px}.mini-grid,.chapter-grid{grid-template-columns:1fr}}