:root { font-family: system-ui, sans-serif; color-scheme: light; color: #17212b; background: #f4f6f8; }
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; }
main { width: min(100%, 42rem); margin: 2rem auto; padding: 1.5rem; background: white; border: 1px solid #ccd4db; border-radius: .5rem; }
h1, h2, h3 { line-height: 1.2; }
form { display: grid; gap: .6rem; margin: 1rem 0 2rem; }
label { font-weight: 600; }
input, select, button { font: inherit; min-height: 2.75rem; padding: .55rem .75rem; border: 1px solid #82909e; border-radius: .25rem; }
button { background: #174b75; color: white; border-color: #174b75; cursor: pointer; }
button:hover { background: #103959; }
:focus-visible { outline: 3px solid #b15306; outline-offset: 2px; }
.hint { color: #475569; }
.toolbar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
#message { min-height: 1.5rem; }
#message.error { color: #a00; }
@media (max-width: 32rem) { main { margin: 0; border: 0; border-radius: 0; min-height: 100vh; padding: 1rem; } }