@font-face { font-family: 'Space Grotesk'; font-weight: 500; font-display: swap; src: url('/fonts/space-grotesk-500.ttf') format('truetype'); }
@font-face { font-family: 'Space Grotesk'; font-weight: 700; font-display: swap; src: url('/fonts/space-grotesk-700.ttf') format('truetype'); }
@font-face { font-family: 'Plus Jakarta Sans'; font-weight: 400; font-display: swap; src: url('/fonts/plus-jakarta-sans-400.ttf') format('truetype'); }
@font-face { font-family: 'Plus Jakarta Sans'; font-weight: 600; font-display: swap; src: url('/fonts/plus-jakarta-sans-600.ttf') format('truetype'); }
@font-face { font-family: 'JetBrains Mono'; font-weight: 400; font-display: swap; src: url('/fonts/jetbrains-mono-400.ttf') format('truetype'); }

:root { color-scheme: dark; }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: #0C111C; color: #F2F5FA; font-family: 'Plus Jakarta Sans', system-ui, sans-serif; }
.page { max-width: 440px; margin: 0 auto; padding: 40px 22px 28px; display: flex; flex-direction: column; min-height: 100vh; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand span { font-family: 'Space Grotesk', sans-serif; font-weight: 700; font-size: 15px; letter-spacing: 0.16em; }
h1 { margin: 28px 0 0; font-family: 'Space Grotesk', sans-serif; font-weight: 500; font-size: 28px; line-height: 1.2; }
.lead { margin: 10px 0 0; font-size: 14px; line-height: 1.55; color: #9AA6BF; }
.tabs { margin-top: 22px; display: flex; gap: 6px; padding: 4px; background: #141B2A; border-radius: 12px; }
.tabs button { flex: 1; height: 38px; border: none; border-radius: 9px; background: transparent; color: #9AA6BF; font: 600 14px 'Plus Jakarta Sans', sans-serif; cursor: pointer; }
.tabs button[aria-selected='true'] { background: #3A63D8; color: #fff; }
.tabs button:focus-visible, .primary:focus-visible { outline: 2px solid #9DB8FF; outline-offset: 2px; }
section { margin-top: 16px; display: flex; flex-direction: column; gap: 12px; }
section[hidden] { display: none; }
.primary { display: flex; align-items: center; justify-content: center; height: 54px; background: #3A63D8; border-radius: 12px; color: #fff; font-weight: 600; font-size: 15px; text-decoration: none; }
.primary[aria-disabled='true'] { opacity: 0.45; pointer-events: none; }
.meta { margin: 0; font-size: 12px; color: #7C8AA5; text-align: center; }
.card { padding: 14px 16px; background: #141B2A; border: 1px solid #263049; border-radius: 14px; font-size: 13px; line-height: 1.55; color: #B6C1D6; }
.card strong { display: block; color: #E3E8F2; margin-bottom: 6px; }
.card ol { margin: 0; padding-left: 20px; }
.card li { margin: 4px 0; }
.unavailable { margin: 16px 0 0; padding: 12px 14px; border-radius: 12px; background: #2A1F10; color: #F2D29B; font-size: 13px; }
.checksum { margin-top: auto; padding: 12px 14px; background: #101726; border: 1px solid #1E2740; border-radius: 12px; display: flex; flex-direction: column; gap: 4px; }
.checksum span { font-size: 11.5px; font-weight: 600; letter-spacing: 0.04em; color: #7C8AA5; }
.checksum code { font-family: 'JetBrains Mono', monospace; font-size: 11px; line-height: 1.5; color: #9AA6BF; word-break: break-all; }
.foot { margin: 12px 0 0; font-size: 11.5px; line-height: 1.5; text-align: center; color: #6E7E99; }