:root{--bg:#0e1117;--panel:#171b23;--line:#2a3442;--text:#eef2f7;--muted:#aeb7c3;--accent:#c62e34;--ink:#121620}
*{box-sizing:border-box}body{margin:0;font-family:Arial,Helvetica,sans-serif;background:linear-gradient(180deg,#0e1117,#151b24);color:var(--text)}
.topbar{display:flex;justify-content:space-between;align-items:center;padding:14px 18px;border-bottom:1px solid var(--line);position:sticky;top:0;background:rgba(14,17,23,.92);backdrop-filter:blur(8px);z-index:20}
.brand{display:flex;gap:12px;align-items:center}.logo{width:46px;height:46px;border-radius:12px;background:var(--accent);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:20px}
.title{font-size:20px;font-weight:700}.subtitle{font-size:13px;color:var(--muted)}.top-actions{display:flex;gap:10px;align-items:center}
input,select,button{font:inherit}input,select{background:#0f141b;color:var(--text);border:1px solid var(--line);padding:10px 12px;border-radius:12px}
button,.linkbtn{border:none;border-radius:12px;padding:10px 14px;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center}.primary{background:var(--accent);color:#fff}
.layout{display:grid;grid-template-columns:220px 1fr;min-height:calc(100vh - 76px)}.sidebar{padding:16px;border-right:1px solid var(--line);background:rgba(0,0,0,.08)}
.nav{display:block;width:100%;text-align:left;margin-bottom:10px;background:#121822;color:var(--text);border:1px solid var(--line)}.nav.active{background:var(--accent);border-color:var(--accent)}
.content{padding:18px}.view{display:none}.view.active{display:block}.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:16px;margin-bottom:16px}
.panel{background:rgba(255,255,255,.035);border:1px solid var(--line);border-radius:18px;padding:18px}.panel h1,.panel h2,.panel h3{margin:0 0 10px}.panel p{margin:0 0 12px;color:var(--muted);line-height:1.45}
.stat-row{display:flex;gap:12px;flex-wrap:wrap}.stat{background:#10151d;border:1px solid var(--line);padding:14px 16px;border-radius:16px;min-width:110px}.stat span{display:block;font-size:26px;font-weight:700}.stat label{display:block;color:var(--muted);font-size:13px;margin-top:4px}
.cards3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.clean{margin:0;padding-left:18px}.clean li{margin:8px 0;color:var(--muted)}
.feature-grid,.viewer-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.feature-grid img,.viewer-grid img{width:100%;background:#fff;border-radius:14px;border:1px solid var(--line)}
.feature-actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:12px}.pill{padding:10px 12px;border-radius:999px;background:#111821;border:1px solid var(--line);color:var(--text)}
.toolbar{display:flex;justify-content:space-between;gap:16px;align-items:center;margin-bottom:12px;flex-wrap:wrap}.filters{display:flex;gap:8px;flex-wrap:wrap}.filters button{background:#121822;color:var(--text);border:1px solid var(--line)}.filters button.active{background:var(--accent);border-color:var(--accent)}
.library-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:16px}.route-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px}.route-card{background:#fff;color:var(--ink);border-radius:18px;overflow:hidden;box-shadow:0 8px 24px rgba(0,0,0,.22);display:flex;flex-direction:column}
.route-card img{width:100%;aspect-ratio:196/339;object-fit:cover;background:#f0f2f5}.route-card .body{padding:14px}.kicker{font-size:12px;color:#6b7280;text-transform:uppercase;letter-spacing:.08em}.rtitle{font-size:18px;font-weight:700;margin:6px 0 10px;line-height:1.15}.actions{display:flex;gap:8px;flex-wrap:wrap}.ghost{background:#eef1f5;color:#111827}
.viewer{position:sticky;top:92px;height:fit-content}.tag-row{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0}.tag{background:#111821;border:1px solid var(--line);border-radius:999px;padding:6px 10px;font-size:12px}.builder-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}.concept-board{margin-top:14px;padding:18px;border-radius:18px;border:1px dashed var(--line);background:#111821;min-height:120px;line-height:1.6}.template-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}.template{background:#10151d;border:1px solid var(--line);border-radius:16px;padding:14px;cursor:pointer}
.trainer-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.train-card{background:#10151d;border:1px solid var(--line);border-radius:18px;padding:20px;text-align:center}.train-card span{display:block;color:var(--muted);font-size:13px;margin-bottom:10px}.train-card strong{font-size:24px}
.practice-card{background:rgba(255,255,255,.035);border:1px solid var(--line);border-radius:18px;padding:18px}.practice-card h3{margin:0 0 6px}.practice-card .focus{color:#fff;background:var(--accent);padding:6px 10px;border-radius:999px;display:inline-block;font-size:12px;margin-bottom:10px}
.quiz-q{padding:14px 0;border-bottom:1px solid var(--line)}.choice{display:flex;gap:8px;align-items:flex-start;margin:8px 0;color:var(--muted)}.count{color:var(--muted)}.mini-label{font-size:12px;color:var(--muted);margin-bottom:6px}
@media (max-width:1050px){.layout{grid-template-columns:1fr}.sidebar{display:flex;gap:8px;overflow:auto}.nav{white-space:nowrap;width:auto;min-width:max-content;margin:0}.hero,.library-layout,.cards3,.builder-grid,.trainer-row,.feature-grid,.viewer-grid{grid-template-columns:1fr}.viewer{position:static}.topbar{flex-direction:column;align-items:stretch;gap:12px}.top-actions{flex-wrap:wrap}}