:root{--ink:#002549;--ink-2:#364854;--accent:#015889;--line:rgba(0,37,73,0.13);--surface-2:#f3f7fa}*{box-sizing:border-box}body{margin:0;background:#fff;color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,Inter,system-ui,sans-serif;font-size:17px;line-height:1.6}.wrap{max-width:640px;margin:0 auto;padding:64px 24px}h1{font-size:32px;letter-spacing:-.02em}.classe-card{border:1px solid var(--line);border-radius:16px;padding:20px 22px;margin-top:14px;background:var(--surface-2);display:flex;align-items:center;justify-content:space-between;gap:16px}.classe-card button{background:var(--accent);color:#fff;border:none;border-radius:12px;padding:12px 20px;font-weight:600;font-size:15px;cursor:pointer;white-space:nowrap}.classe-card button:disabled{opacity:.6;cursor:default}.error{color:#b42318;margin-top:16px}