body { margin: 0; background: #081321; color: #eaf1fa; font-family: system-ui, sans-serif; }
.startup-panel { box-sizing: border-box; width: min(540px, calc(100% - 32px)); margin: 12vh auto; padding: 28px; border: 1px solid #365473; border-radius: 24px; background: #10243a; }
.startup-panel h1 { margin: 0 0 16px; font-size: clamp(24px, 5vw, 32px); }
.startup-panel p { line-height: 1.65; color: #c2d3e6; }
.startup-panel button { font: inherit; font-weight: 600; min-height: 48px; border-radius: 12px; border: 0; padding: 12px 20px; background: #9fc7ff; color: #081321; cursor: pointer; }
.startup-panel button:focus-visible { outline: 3px solid white; outline-offset: 4px; }