:root {
  color-scheme: light;
  background: #f5f5f7;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 50% 18%, rgba(0, 122, 255, 0.08), transparent 30%),
    linear-gradient(160deg, #f5f5f7 0%, #ffffff 54%, #eef3f8 100%);
}

.boot-splash {
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: 24px;
  color: #1d1d1f;
  font-family: Inter, ui-sans-serif, system-ui, sans-serif;
}

.boot-card {
  display: grid;
  justify-items: center;
  gap: 20px;
}

.boot-mark {
  position: relative;
  width: 76px;
  height: 76px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(209, 209, 214, 0.9);
  border-radius: 24px;
  background: rgba(245, 245, 247, 0.92);
  color: #007aff;
  box-shadow: 0 22px 62px -40px rgba(28, 28, 30, 0.32);
  animation: boot-breathe 1.8s ease-in-out infinite;
}

.boot-mark::before {
  content: "";
  position: absolute;
  inset: -18px;
  border-radius: 999px;
  border: 2px solid rgba(0, 122, 255, 0.12);
  border-top-color: rgba(0, 122, 255, 0.66);
  animation: boot-spin 1.2s linear infinite;
}

.boot-title {
  font-size: 28px;
  line-height: 1;
  font-weight: 900;
  letter-spacing: 0;
}

.boot-progress {
  width: min(260px, 70vw);
  height: 7px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(0, 122, 255, 0.12);
}

.boot-progress span {
  display: block;
  width: 44%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #007aff, #4da3ff, #006edb);
  animation: boot-progress 1.25s ease-in-out infinite;
}

@keyframes boot-spin {
  to { transform: rotate(360deg); }
}

@keyframes boot-breathe {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.04); }
}

@keyframes boot-progress {
  0% { transform: translateX(-110%); }
  100% { transform: translateX(250%); }
}