:root{--tg-primary:#0004ff;--tg-navy:#050786;--tg-bg:#eff8ff;--tg-white:#fff;--tg-ink:#0b1030;--tg-muted:#5a6280;--tg-line:#d6e4f5;--mg-green:#0004ff;--mg-green-dark:#050786}*{box-sizing:border-box}body,html{margin:0;padding:0}body{min-height:100vh;background:var(--tg-bg);color:var(--tg-ink);font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif}h1,h2,h3{text-transform:uppercase;letter-spacing:.02em;color:var(--tg-navy);margin:0 0 12px}a{color:var(--tg-primary);text-decoration:none}.container{max-width:1040px;margin:0 auto;padding:0 20px}.site-header{background:linear-gradient(90deg,var(--mg-green-dark) 0,var(--mg-green) 100%);border-bottom:1px solid rgba(0,0,0,.15);box-shadow:0 1px 8px rgba(5,7,134,.12);position:-webkit-sticky;position:sticky;top:0;z-index:50}.site-header .bar{display:flex;align-items:center;gap:32px;height:60px;padding:0 24px;max-width:1120px;margin:0 auto}.wordmark{display:inline-flex;align-items:center;gap:10px;font-weight:900;font-size:19px;letter-spacing:.06em;text-transform:uppercase;white-space:nowrap}.wordmark,.wordmark:hover{color:#fff}.wordmark-tag{font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--mg-green-dark);background:hsla(0,0%,100%,.92);padding:3px 9px;border-radius:999px}.nav-links{display:flex;gap:4px;align-items:center;margin-right:auto}.nav-links a{position:relative;color:hsla(0,0%,100%,.82);font-weight:600;font-size:13px;text-transform:uppercase;letter-spacing:.04em;padding:8px 12px;border-radius:8px;transition:color .12s ease,background .12s ease}.nav-links a:hover{color:#fff;background:hsla(0,0%,100%,.12)}.nav-links a.active{color:#fff}.nav-links a.active:after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;background:#fff}.auth-actions{display:flex;gap:14px;align-items:center;padding-left:20px;border-left:1px solid 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span{font-size:15px;font-weight:600;color:var(--tg-muted)}.tier-card ul{list-style:none;padding:0;margin:18px 0 24px}.tier-card li{padding:8px 0;border-bottom:1px solid var(--tg-line);font-size:14px}.tier-card.selected{border-color:var(--tg-primary);box-shadow:0 12px 30px rgba(0,4,255,.18)}.field{margin-bottom:16px}.field label{display:block;font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;color:var(--tg-muted);margin-bottom:6px}.field input,.field select,.field textarea{width:100%;padding:12px 14px;border:1px solid var(--tg-line);border-radius:10px;font-size:15px;background:#fff;color:var(--tg-ink)}.row{display:flex;gap:12px}.row .field{flex:1 1}.narrow{max-width:520px;margin:0 auto}.muted{color:var(--tg-muted)}.notice{padding:12px 14px;border-radius:10px;font-size:14px;margin-top:16px}.notice.ok{background:rgba(0,4,255,.08);border:1px solid var(--tg-primary);color:var(--tg-navy)}.notice.err{background:#fdecee;border:1px solid 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var(--mg-green)}.challenge-num{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:999px;background:var(--mg-green);color:#fff;font-weight:900;font-size:15px;margin-bottom:12px}.challenge-problem{font-size:16px;color:var(--tg-ink);text-transform:none;letter-spacing:0;margin-bottom:10px}.challenge-fix{color:var(--tg-muted);font-size:14px;line-height:1.5;margin:0}.component-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));grid-gap:20px;gap:20px}.component-card{display:flex;flex-direction:column;justify-content:space-between;gap:16px}.component-card h3{text-transform:none;letter-spacing:0;color:var(--mg-green-dark);margin-bottom:8px}.component-card .muted{font-size:14px;line-height:1.5}.component-links{display:flex;gap:10px;flex-wrap:wrap}.component-card .btn{border-color:var(--mg-green);color:var(--mg-green-dark);padding:8px 18px;font-size:13px}.component-card 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span:first-child{color:var(--tg-muted);text-transform:uppercase;font-size:12px;letter-spacing:.03em}.result-list li span:last-child{font-weight:700}