:root {
  color-scheme: dark;
  font-family: Inter, "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  background: #090d16;
  color: #f8fafc;
}
* {
  box-sizing: border-box;
}

html,
body,
#app-shell,
#screen {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
}

body {
  background:
    radial-gradient(circle at 50% 15%, rgb(128 48 48 / 28%), transparent 40%),
    linear-gradient(145deg, #121827, #070a11 70%);
}

#screen {
  position: absolute;
  inset: 0;
  visibility: hidden;
}

body[data-state="ready"] #screen {
  visibility: visible;
}

#loading {
  position: absolute;
  z-index: 2;
  inset: 0;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 0.8rem;
  padding: 2rem;
  text-align: center;
  transition: opacity 180ms ease;
}

body[data-state="ready"] #loading {
  pointer-events: none;
  opacity: 0;
}

.brand {
  display: grid;
  width: 5rem;
  height: 5rem;
  place-items: center;
  border: 1px solid rgb(251 191 36 / 45%);
  border-radius: 1.2rem;
  background: linear-gradient(145deg, #991b1b, #450a0a);
  box-shadow: 0 1.5rem 4rem rgb(0 0 0 / 45%);
  color: #fef3c7;
  font-family: STKaiti, KaiTi, serif;
  font-size: 3rem;
  font-weight: 700;
}

h1 {
  margin: 0.2rem 0 0;
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  letter-spacing: 0.08em;
}

p {
  max-width: 36rem;
  margin: 0;
  color: #cbd5e1;
}

#loading-detail {
  min-height: 1.4em;
  color: #94a3b8;
  font-size: 0.875rem;
}

progress {
  width: min(30rem, 80vw);
  height: 0.65rem;
  overflow: hidden;
  border: 0;
  border-radius: 999px;
  background: #1e293b;
}

progress::-webkit-progress-bar {
  background: #1e293b;
}

progress::-webkit-progress-value {
  background: linear-gradient(90deg, #b91c1c, #f59e0b);
}

progress::-moz-progress-bar {
  background: linear-gradient(90deg, #b91c1c, #f59e0b);
}

button {
  margin-top: 0.5rem;
  padding: 0.65rem 1.2rem;
  border: 1px solid #f59e0b;
  border-radius: 0.6rem;
  background: #7f1d1d;
  color: white;
  cursor: pointer;
  font: inherit;
}