:root{--sandbox-height:72px}body{padding-top:var(--sandbox-height)!important}.sandbox-banner{position:fixed;z-index:2147483000;top:0;left:0;right:0;min-height:var(--sandbox-height);background:#fff2b3;color:#352700;border-bottom:2px solid #dfac00;display:flex;align-items:center;justify-content:center;gap:18px;padding:10px 20px;font:14px/1.4 system-ui,sans-serif;text-align:left}.sandbox-banner strong{font-size:15px;display:block;letter-spacing:.04em}.sandbox-banner a{color:#272100;text-decoration:underline;font-weight:700;white-space:nowrap}.sandbox-banner nav{display:flex;gap:14px}.sandbox-mail-shell{max-width:1050px;margin:30px auto;padding:24px}.sandbox-mail-shell h1{font-size:30px}.sandbox-mail-help{padding:20px;border:1px solid #dcb130;border-radius:12px;background:#fff8d7;color:#352700}.sandbox-mail-toolbar{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin:22px 0}.sandbox-mail-card{padding:22px;border:1px solid #ced8e2;border-radius:14px;margin:15px 0;background:white;color:#13283e}.sandbox-mail-card pre{white-space:pre-wrap;overflow-wrap:anywhere;font:14px/1.65 system-ui,sans-serif}.sandbox-mail-card .sandbox-mail-status{font-weight:700;padding:9px 0;color:#8b5400}.sandbox-mail-card button{margin-top:12px}.sandbox-mail-error{color:#ad1c24}.sandbox-admin .sidebar{top:var(--sandbox-height);height:calc(100vh - var(--sandbox-height))}.sandbox-admin .auth-shell{min-height:calc(100vh - var(--sandbox-height))}a[href^="/register"],.auth-tabs a[href^="/register"]{display:none!important}@media(max-width:650px){:root{--sandbox-height:116px}.sandbox-banner{align-items:flex-start;gap:8px;flex-direction:column;padding:10px 14px;font-size:12px}.sandbox-banner strong{font-size:14px}.sandbox-banner nav{gap:20px}.sandbox-mail-shell{padding:18px;margin:10px auto}.sandbox-mail-shell h1{font-size:25px}}