:root{--bg:#f3f6fc;--surface:#fff;--surface-muted:#f6f9fd;--border:#d7e1ef;--text:#0c163e;--muted:#66728a;--primary:#0c163e;--blue:#5394f7;--gold:#cc8503;--radius:14px}.hub-shell{display:grid;grid-template-columns:270px 1fr;background:var(--bg)}.hub-sidebar{min-height:calc(100vh - 44px);display:flex;flex-direction:column;padding:20px;background:#0c163e;color:#fff}.hub-brand{display:flex;gap:12px;align-items:center;padding-bottom:18px;border-bottom:1px solid rgba(255,255,255,.16)}.hub-brand img{width:54px;height:auto}.hub-brand strong,.hub-brand span{display:block}.hub-brand span{margin-top:2px;color:#a7cbfb;font-size:.75rem}.hub-sidebar nav{margin-top:14px}.hub-sidebar nav p{margin:16px 10px 5px;color:#a7cbfb;font-size:.65rem;font-weight:900;letter-spacing:.1em;text-transform:uppercase}.hub-sidebar button{display:block;width:100%;padding:10px 12px;border:0;border-radius:7px;background:transparent;color:#e4ecfb;text-align:left;font-weight:700}.hub-sidebar button.active{background:#fff;color:#0c163e}.hub-main{min-width:0}.hub-topbar{display:flex;justify-content:space-between;gap:20px;align-items:center;min-height:88px;padding:16px 30px;border-bottom:1px solid var(--border);background:#fff}.hub-topbar p{margin:0;color:var(--muted);font-size:.78rem}.hub-topbar h1{margin:2px 0 0;font-size:1.55rem}.hub-user{padding:6px 9px;border:1px solid var(--border);border-radius:999px;color:var(--muted);font-size:.8rem}.hub-content{padding:30px}.hub-welcome{padding:28px;border:1px solid var(--border);border-radius:16px;background:#fff}.hub-welcome h2{margin:0 0 8px;font-size:2rem}.hub-welcome p:not(.section-kicker){max-width:66ch;color:var(--muted)}.hub-home-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:18px}.hub-home-grid article{padding:20px;border:1px solid var(--border);border-radius:14px;background:#fff}.hub-home-grid h3{margin:0 0 8px}.hub-home-grid p{color:var(--muted)}.hub-progress{height:12px;border:1px solid var(--border);background:#eef3fb}.hub-progress span{display:block;height:100%;background:var(--blue)}.tag-row{display:flex;flex-wrap:wrap;gap:8px}.tag-row span{padding:6px 9px;border:1px solid var(--border);border-radius:999px;background:#fff}.space-top{margin-top:18px}.bird-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.bird-steps>div{padding:18px;border:1px solid var(--border);border-radius:14px;background:#fff}.bird-steps strong{color:var(--blue);font-size:1.4rem}.bird-steps p{font-weight:700}.bird-steps span{color:var(--muted)}.course-card{overflow:hidden;border:1px solid var(--border);border-radius:14px;background:#fff}.course-card header{display:flex;justify-content:space-between;gap:16px;padding:20px;border-bottom:1px solid var(--border)}.course-card h3{margin:0}.course-card header>span{color:var(--muted)}.module-row{display:flex;justify-content:space-between;gap:14px;padding:13px 18px;border-bottom:1px solid var(--border)}.module-row:last-child{border-bottom:0}.module-row span{color:var(--muted)}.scenario,.caller,.review{padding:20px;border:1px solid var(--border);border-radius:14px;background:#fff}.scenario h3{font-size:1.5rem}.practice-layout{display:grid;grid-template-columns:1.25fr .75fr;gap:16px}.caller p{font-size:1.35rem}.caller span,.review p{color:var(--muted)}@media(max-width:850px){.hub-shell{grid-template-columns:1fr}.hub-sidebar{min-height:0}.hub-sidebar nav{display:grid;grid-template-columns:repeat(3,1fr);gap:4px}.hub-sidebar nav p{grid-column:1/-1}.hub-home-grid,.practice-layout{grid-template-columns:1fr}.bird-steps{grid-template-columns:1fr 1fr}}@media(max-width:560px){.hub-sidebar nav{grid-template-columns:1fr 1fr}.hub-content{padding:18px}.hub-user{display:none}.hub-home-grid,.bird-steps{grid-template-columns:1fr}.course-card header,.module-row{display:block}.course-card header>span,.module-row span{display:block;margin-top:4px}}