/* Trang tạm khi đang phát triển. Màu theo phương án A "Ivory Halo" (sáng) và B "Midnight Halo" (tối), D08. */
:root {
  --bg: #FBF8F3;
  --text: #1E1A2B;
  --muted: #5A5470;
  --primary: #4F3BC4;
  --gold: #B8862B;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0F0C1D;
    --text: #EEEAF8;
    --muted: #A9A3C7;
    --primary: #9D8CFF;
    --gold: #F0C46C;
  }
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.5;
}
.wrap {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 32px 16px;
}
.halo {
  width: 128px;
  height: 128px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  border: 2px solid var(--gold);
  box-shadow: 0 0 0 10px color-mix(in srgb, var(--gold) 18%, transparent),
              0 0 48px color-mix(in srgb, var(--primary) 35%, transparent);
  margin-bottom: 28px;
  animation: glow 900ms ease-out both;
}
.halo span {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 56px;
  color: var(--primary);
}
h1 {
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 600;
  font-size: clamp(2rem, 6vw, 3rem);
  margin: 0 0 8px;
  letter-spacing: 0.01em;
}
.tagline { font-size: 1.125rem; margin: 0 0 16px; }
.status { color: var(--primary); font-weight: 600; margin: 0 0 8px; }
.vi { color: var(--muted); margin: 0; }
@keyframes glow {
  from { opacity: 0; transform: scale(0.94); }
  to { opacity: 1; transform: scale(1); }
}
@media (prefers-reduced-motion: reduce) {
  .halo { animation: none; }
}