:root { color-scheme: light; font-family: "Segoe UI", Arial, sans-serif; color: #172d39; background: #fff; }
* { box-sizing: border-box; }
body { margin: 0; }
main { max-width: 480px; padding: 25px 22px; margin: auto; }
header { display: flex; align-items: center; gap: 12px; margin-bottom: 31px; }
.brand { background: #005d67; color: white; padding: 7px 10px; border-radius: 6px; font-weight: 700; font-size: 18px; }
.eyebrow { font-size: 11px; font-weight: 600; letter-spacing: 1.6px; color: #50636c; }
h1 { font-size: 25px; line-height: 1.2; letter-spacing: -.4px; margin: 0 0 12px; }
.intro { font-size: 14px; line-height: 1.55; color: #50636c; margin: 0 0 28px; }
label { display: block; font-weight: 600; font-size: 13px; margin-bottom: 9px; }
input { width: 100%; min-width: 0; padding: 12px; font: inherit; font-size: 17px; border: 1px solid #879ba4; border-radius: 5px; }
input:focus-visible, button:focus-visible { outline: 3px solid #237dab; outline-offset: 3px; }
input[aria-invalid="true"] { border-color: #b32222; }
.hint { color: #50636c; font-size: 12px; margin: 9px 0 23px; }
.preview { background: #f1f6f6; border: 1px solid #dbe6e7; border-radius: 6px; padding: 14px; margin-bottom: 20px; }
.preview-label { display: block; font-size: 10px; font-weight: 600; letter-spacing: 1.1px; color: #50636c; margin-bottom: 8px; }
output { display: block; font-size: 13px; line-height: 1.6; overflow-wrap: anywhere; }
button { width: 100%; border: 0; border-radius: 5px; background: #005d67; color: #fff; font: inherit; font-weight: 600; padding: 13px 10px; cursor: pointer; }
button:hover:enabled { background: #00454d; }
button:disabled { opacity: .55; cursor: default; }
#status { font-size: 13px; line-height: 1.55; min-height: 42px; overflow-wrap: anywhere; }
#status[data-kind="error"] { color: #a4262c; }
#status[data-kind="success"] { color: #005d67; }
footer { border-top: 1px solid #e1e8eb; padding-top: 17px; font-size: 12px; line-height: 1.55; color: #50636c; margin-top: 20px; }
@media (max-width: 280px) { main { padding: 20px 14px; } h1 { font-size: 22px; } }