.shell{display:grid;min-height:100dvh}.shell-main{display:flex;flex-direction:column;justify-content:center;min-height:100dvh;padding:40px 20px calc(48px + env(safe-area-inset-bottom))}.shell-inner{width:100%;max-width:440px;margin:0 auto}.shell-brand{display:flex;align-items:center;gap:9px;margin:0 0 28px;font-size:16px;font-weight:600;letter-spacing:-.01em;color:var(--ink);text-decoration:none}.shell-mark{display:grid;place-items:center;width:28px;height:28px;border-radius:var(--r-sm);background:var(--ink);color:#fff;font-size:13px;font-weight:700;letter-spacing:-.02em}.shell-aside{display:none}@media (min-width:900px){.shell{grid-template-columns:1fr 1fr}.shell-aside{position:sticky;top:0;display:flex;flex-direction:column;justify-content:center;height:100dvh;padding:56px 48px;background:var(--dark);color:var(--dark-ink)}}@media (min-width:1200px){.shell{grid-template-columns:1fr 1.05fr}.shell-aside{padding:64px 72px}}.aside-eyebrow{margin:0 0 14px;font-size:12px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--dark-muted)}.aside-title{margin:0 0 32px;font-size:30px;line-height:1.2;font-weight:600;letter-spacing:-.02em;max-width:15ch}.aside-list{display:grid;gap:22px;margin:0;padding:0;list-style:none;max-width:42ch}.aside-list li{display:grid;grid-template-columns:20px 1fr;gap:12px;align-items:start}.aside-list svg{margin-top:3px;color:var(--dark-ink)}.aside-list b{display:block;font-size:15px;font-weight:600;margin-bottom:3px}.aside-list span{display:block;font-size:14px}.aside-foot,.aside-list span{line-height:1.5;color:var(--dark-muted)}.aside-foot{margin:36px 0 0;padding-top:22px;border-top:1px solid var(--dark-line);font-size:13px;max-width:42ch}.steps{margin:0 0 26px;padding:0;list-style:none}.step,.steps{display:flex;align-items:center;gap:8px}.step{font-size:13px;color:var(--muted)}.step+.step:before{content:"";width:100%;min-width:16px;height:1px;background:var(--line)}.step-dot{display:grid;place-items:center;flex:none;width:24px;height:24px;border-radius:50%;background:var(--line);color:var(--muted);font-size:12px;font-weight:600;font-variant-numeric:tabular-nums}.step-now .step-dot{background:var(--ink);color:#fff}.step-now .step-label{color:var(--ink);font-weight:500}.step-done .step-dot{background:var(--accent);color:#fff}.step-done .step-label{color:var(--ink)}.step+.step{flex:1}.code{display:grid;grid-auto-flow:column;grid-auto-columns:1fr;gap:8px;margin:0 0 4px}.code input{min-width:0;padding:0;text-align:center;font-size:22px;font-weight:600;font-variant-numeric:tabular-nums;min-height:56px;letter-spacing:0}.code input:not(:placeholder-shown){border-color:var(--ink)}.code-foot{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:0;font-size:14px}.code-foot form{display:inline}.code-foot button{padding:0;border:0;background:none;font:inherit;font-weight:500;color:var(--ink);cursor:pointer;text-decoration:underline;text-underline-offset:3px}.code-foot button[disabled]{color:var(--muted);font-weight:400;cursor:default;text-decoration:none}.code-foot .sep{color:var(--line-2)}.help{margin:22px 0 0;padding:14px 16px;border-radius:var(--r-xl);background:var(--bg);font-size:13.5px}.help-title{display:flex;align-items:center;gap:8px;margin:0 0 8px;font-weight:600;color:var(--ink)}.help ul{margin:0;padding-left:18px;color:var(--muted);line-height:1.6}