:root { color-scheme: light; --paper: #f3f7fa; --ink: #182d46; --muted: #53677a; --line: #c7d7e3; --blue: #1957af; --white: #fff; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: "Avenir Next", "Segoe UI", sans-serif; }
header, main, footer { width: min(1080px, calc(100% - 64px)); margin-inline: auto; }
header { padding-block: 30px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand { color: var(--ink); text-decoration: none; font-size: 24px; font-weight: 750; }
.brand span { font-weight: 400; }
.status { color: var(--muted); font-size: 14px; border: 1px solid var(--line); padding: 8px 12px; border-radius: 6px; }
main { padding-block: 65px 75px; }
h1 { margin: 0 0 26px; font-size: clamp(36px, 5.4vw, 62px); line-height: 1.12; font-weight: 650; letter-spacing: -0.035em; }
.intro > p { color: var(--muted); font-size: 20px; line-height: 1.6; max-width: 650px; margin: 0; }
.flow { margin-top: 62px; padding: 32px; background: var(--white); border: 1px solid var(--line); border-radius: 12px; display: grid; grid-template-columns: 1fr 180px 1.2fr; align-items: center; gap: 30px; }
h2 { font-size: 18px; margin: 0 0 16px; }
.source p, .destination li { color: var(--muted); font-size: 17px; line-height: 1.8; margin: 0; }
ul { list-style: none; padding: 0; margin: 0; }
.conversion { display: flex; align-items: center; gap: 12px; color: var(--blue); }
.conversion span { height: 2px; background: var(--line); flex: 1; }
.conversion strong { font-size: 26px; font-weight: 650; }
.notice { color: var(--muted); margin: 24px 0 0; line-height: 1.6; }
footer { border-top: 1px solid var(--line); padding-block: 24px; display: flex; justify-content: space-between; color: var(--muted); font-size: 14px; gap: 20px; }
a:focus-visible { outline: 3px solid var(--blue); outline-offset: 5px; }
@media (max-width: 680px) { header, main, footer { width: calc(100% - 40px); } main { padding-block: 38px 50px; } .intro > p { font-size: 18px; } .flow { grid-template-columns: 1fr; margin-top: 38px; padding: 24px; gap: 24px; } .conversion { width: 150px; } }