:root { color-scheme: light; font-family: system-ui, sans-serif; color: #20232b; background: #f5f5f6; }
* { box-sizing: border-box; }
body { margin: 0; line-height: 1.6; }
header { display: flex; justify-content: space-between; padding: 1rem max(1rem, calc((100vw - 680px) / 2)); background: #fff; border-bottom: 1px solid #ddd; }
header a { font-weight: 800; text-decoration: none; }
main { max-width: 680px; margin: 1.5rem auto; padding: 1.5rem; background: #fff; border-radius: 12px; }
h1 { font-size: 1.8rem; line-height: 1.2; } h2 { margin-top: 2rem; font-size: 1.3rem; }
a { color: #a8202c; text-underline-offset: 3px; }
label { display: block; margin-top: 1rem; font-weight: 600; }
input:not([type=checkbox]):not([type=hidden]) { display: block; width: 100%; padding: .8rem; font: inherit; border: 1px solid #777; border-radius: 6px; }
input[type=checkbox] { width: 1.25rem; height: 1.25rem; margin: .25rem .5rem 0 0; flex-shrink: 0; accent-color: #c62b38; }
.check { display: flex; align-items: flex-start; font-weight: 400; }
fieldset { border: 1px solid #ddd; border-radius: 6px; padding: 1rem; margin: 1.2rem 0; }
legend { font-weight: 700; padding: 0 .4rem; }
button { font: inherit; font-weight: 700; padding: .8rem 1.3rem; color: white; background: #c62b38; border: none; border-radius: 6px; cursor: pointer; min-height: 44px; }
button:hover { background: #a8202c; } button.secondary { color: #a8202c; background: #fff; border: 1px solid #a8202c; }
:focus-visible { outline: 3px solid #057a5c; outline-offset: 3px; }
.hint { font-size: .9rem; color: #51545c; margin: .4rem 0; }
.notice { background: #e6f4ee; border-left: 4px solid #057a5c; padding: 1rem; }
.validation { color: #a8202c; } .validation-summary-valid { display: none; }
.danger { margin-top: 2rem; padding: 1rem; border: 1px solid #c62b38; border-radius: 8px; }
.danger h2 { margin-top: 0; } details { margin: 1rem 0; } summary { cursor: pointer; color: #a8202c; }
.policy { white-space: pre-wrap; overflow-wrap: anywhere; padding: 1rem 0; }
footer { max-width: 680px; margin: 1.5rem auto; padding: 0 1rem; font-size: .9rem; }
@media (max-width: 600px) { main { margin: .75rem; padding: 1rem; } }