:root { font-family: system-ui, sans-serif; color: #233247; background: #f2f5fa; color-scheme: light; }
* { box-sizing: border-box; }
body { margin: 0; padding: 40px 16px; }
.card { max-width: 520px; margin: 5vh auto; padding: 28px; background: white; border-radius: 16px; box-shadow: 0 8px 35px #142a4b14; }
header { display: flex; align-items: center; gap: 16px; }
h1 { font-size: 24px; margin: 0; }
header p { margin: 5px 0; color: #607086; }
.icon { background: #1565c0; color: white; border-radius: 50%; width: 44px; height: 44px; display: grid; place-items: center; font-size: 28px; }
p { line-height: 1.5; }
.versions { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 20px; margin: 24px 0; border: 1px solid #1565c033; border-radius: 12px; background: #1565c00c; }
.versions span { display: block; font-size: 12px; color: #607086; margin-bottom: 6px; }
.versions strong { font-size: clamp(16px, 4vw, 22px); font-variant-numeric: tabular-nums; }
.versions b, #available-version { color: #1565c0; }
.progress-panel { text-align: center; }
svg { width: 130px; height: 130px; }
circle { fill: none; stroke-width: 7; }
.track { stroke: #e5eaf0; }
.meter { stroke: #219653; transform: rotate(-90deg); transform-origin: center; }
text { fill: #233247; font-size: 20px; }
#status { text-align: center; }
.message, .guidance { background: #edf3fc; border-radius: 9px; padding: 14px; }
.message { background: #fff0ed; color: #943925; }
label { display: block; line-height: 1.5; margin: 20px 0; }
footer { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 10px; margin-top: 24px; }
button { font: inherit; background: #1565c0; color: white; border: 0; border-radius: 7px; padding: 11px 16px; cursor: pointer; }
button:disabled { opacity: .5; cursor: default; }
button.secondary { background: #edf3fc; color: #1565c0; }
.footnote { margin-top: 26px; font-size: 12px; color: #607086; }
[hidden] { display: none !important; }