* { box-sizing: border-box; }
body { margin: 0; background: #f4f4f5; color: #18181b; font-family: system-ui, sans-serif; }
.key-entry { min-height: 100vh; min-height: 100dvh; display: grid; place-items: center; padding: 24px; }
.key-entry form { width: min(100%, 380px); }
#access-key { width: 100%; padding: 17px 20px; border: 1px solid #e4e4e7; border-radius: 12px; background: #fff; font: inherit; font-size: 16px; outline: none; box-shadow: 0 1px 2px rgb(0 0 0 / 4%); }
#access-key:focus { border-color: #2563eb; box-shadow: 0 0 0 3px rgb(37 99 235 / 15%); }
#access-key[aria-invalid] { border-color: #dc2626; }
#key-error { margin: 12px 4px 0; color: #b91c1c; font-size: 14px; line-height: 1.5; }