:root { color-scheme: light dark; --background: #f3f7f6; --surface: #fff; --ink: #163a38; --muted: #49635f; --accent: #0e5a59; }
html, body { margin: 0; background: var(--background); }
#kowroo-startup [hidden] { display: none; }
#kowroo-startup { position: fixed; inset: 0; z-index: 10000; overflow: auto; display: grid; place-items: center; min-height: 100%; box-sizing: border-box; padding: 24px; background: radial-gradient(ellipse at top, #dcece7, transparent 70%), var(--background); color: var(--ink); font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
.startup-card { width: min(100%, 420px); box-sizing: border-box; padding: 40px 24px; text-align: center; border: 1px solid #cbdcd6; border-radius: 24px; background: var(--surface); box-shadow: 0 16px 60px #123f3610; }
.startup-mark { border-radius: 20px; }
.startup-brand { margin: 22px 0 12px; font-size: 14px; font-weight: 750; letter-spacing: .18em; }
#startup-title { margin: 0 0 28px; font-size: clamp(24px, 5vw, 30px); line-height: 1.25; font-weight: 650; }
#startup-message, noscript p { margin: 16px 0 0; color: var(--muted); line-height: 1.6; }
.startup-spinner { display: inline-block; width: 26px; height: 26px; border: 3px solid #cbdcd6; border-top-color: var(--accent); border-radius: 50%; animation: startup-turn 1s linear infinite; }
#startup-retry { margin-top: 24px; min-height: 48px; padding: 12px 24px; border: 0; border-radius: 12px; background: var(--accent); color: #fff; font: inherit; font-weight: 650; cursor: pointer; }
#startup-retry:focus-visible { outline: 3px solid var(--ink); outline-offset: 4px; }
@keyframes startup-turn { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .startup-spinner { animation: none; } }
@media (prefers-color-scheme: dark) {
  :root { --background: #102321; --surface: #19312e; --ink: #edf5f2; --muted: #bccfc8; --accent: #126b68; }
  #kowroo-startup { background: var(--background); }
  .startup-card { border-color: #36564e; }
  .startup-spinner { border-color: #36564e; border-top-color: #9bd6c5; }
}