:root { color-scheme: light; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; color: #18233a; background: #f3f5f9; line-height: 1.6; }
* { box-sizing: border-box; }
body { margin: 0; }
.shell { max-width: 840px; margin: 0 auto; padding: 48px 24px 24px; }
.brand { display: inline-flex; align-items: baseline; gap: 10px; margin-bottom: 44px; font-size: 24px; font-weight: 800; letter-spacing: -.8px; text-decoration: none; color: #14233f; }
.brand span { font-size: 13px; letter-spacing: 2px; color: #64728b; }
.badge { display: inline-block; padding: 6px 12px; border-radius: 999px; font-size: 13px; background: #e4ebff; color: #304c91; }
h1 { font-size: clamp(32px, 6vw, 48px); line-height: 1.15; margin: 20px 0 18px; letter-spacing: -1.4px; }
h2 { font-size: 21px; line-height: 1.3; margin: 0 0 12px; }
p { margin: 0 0 14px; }
.intro { max-width: 720px; color: #576680; font-size: 18px; margin-bottom: 28px; }
.settings, .notice { border: 1px solid #dce3ee; border-radius: 18px; padding: 26px; margin: 20px 0; background: white; }
.notice { background: #edf2fb; }
.notice p:last-child { margin-bottom: 0; }
label { display: block; margin-top: 20px; margin-bottom: 7px; font-weight: 600; font-size: 14px; }
input { width: 100%; padding: 13px 14px; border: 1px solid #ccd6e5; border-radius: 9px; background: #f7f9fc; color: #1c3359; font: 14px ui-monospace, SFMono-Regular, Consolas, monospace; user-select: all; }
input:focus-visible, a:focus-visible { outline: 3px solid #7d9ff6; outline-offset: 3px; }
a { color: #2456bd; }
.actions { display: flex; align-items: center; flex-wrap: wrap; gap: 20px; margin-top: 24px; }
.button { display: inline-block; padding: 11px 18px; border-radius: 9px; background: #275bc7; color: white; text-decoration: none; font-weight: 600; }
.button:hover { background: #194ba9; }
ol { padding-left: 22px; }
li { margin: 12px 0; }
code { font-size: .9em; overflow-wrap: anywhere; }
footer { color: #748199; font-size: 13px; margin-top: 32px; }
@media (max-width: 540px) { .shell { padding: 28px 16px 20px; } .brand { margin-bottom: 30px; } .settings, .notice { padding: 20px 18px; border-radius: 14px; } .intro { font-size: 16px; } }