/* ── ls-yc.com · Coming Soon ────────────────────────────────
   Dark aurora glass theme · PC-first · no external assets */

:root {
  --bg: #070b16;
  --text: #eef1fb;
  --muted: rgba(238, 241, 251, 0.55);
  --faint: rgba(238, 241, 251, 0.35);
  --violet: #8b5cf6;
  --cyan: #22d3ee;
  --magenta: #d946ef;
  --glass: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.12);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(ellipse 90% 65% at 50% -12%, rgba(139, 92, 246, 0.16), transparent 62%),
    var(--bg);
  -webkit-font-smoothing: antialiased;
}

/* ── background layers ── */

.aurora {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.55;
  will-change: transform, translate;
}

.blob-1 {
  width: 56vw; height: 56vw; left: -16vw; top: -22vw;
  background: radial-gradient(circle at 32% 32%, rgba(139, 92, 246, 0.85), transparent 66%);
  animation: drift-1 26s ease-in-out infinite alternate;
}

.blob-2 {
  width: 48vw; height: 48vw; right: -14vw; top: 6vh;
  background: radial-gradient(circle at 58% 42%, rgba(34, 211, 238, 0.6), transparent 66%);
  animation: drift-2 32s ease-in-out infinite alternate;
}

.blob-3 {
  width: 42vw; height: 42vw; left: 32vw; bottom: -24vw;
  background: radial-gradient(circle at 50% 50%, rgba(217, 70, 239, 0.5), transparent 66%);
  animation: drift-3 38s ease-in-out infinite alternate;
}

@keyframes drift-1 {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to   { transform: translate3d(9vw, 7vh, 0) scale(1.15); }
}

@keyframes drift-2 {
  from { transform: translate3d(0, 0, 0) scale(1.1) rotate(0deg); }
  to   { transform: translate3d(-7vw, 9vh, 0) scale(0.95) rotate(18deg); }
}

@keyframes drift-3 {
  from { transform: translate3d(0, 0, 0) scale(0.95); }
  to   { transform: translate3d(-10vw, -6vh, 0) scale(1.2); }
}

.grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.032) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse 75% 60% at 50% 42%, #000 28%, transparent 74%);
  mask-image: radial-gradient(ellipse 75% 60% at 50% 42%, #000 28%, transparent 74%);
}

#stars {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

/* ── content ── */

main {
  position: relative;
  z-index: 1;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 48px;
  padding: 11px 24px;
  border-radius: 999px;
  border: 1px solid var(--glass-border);
  background: var(--glass);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  box-shadow:
    0 12px 40px rgba(0, 0, 0, 0.35),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--muted);
}

.badge .spark { color: #c4b5fd; }

.title {
  margin: 0;
  font-size: clamp(56px, 8vw, 124px);
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: -0.02em;
  background: linear-gradient(90deg, #eef2ff 0%, #a78bfa 35%, #67e8f9 70%, #eef2ff 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  animation: shimmer 6s linear infinite;
  filter: drop-shadow(0 12px 60px rgba(139, 92, 246, 0.35));
}

@keyframes shimmer {
  to { background-position: 200% center; }
}

.divider {
  width: 96px;
  height: 1px;
  margin-top: 40px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.45), transparent);
}

.tagline {
  margin: 26px 0 0;
  max-width: 620px;
  font-size: clamp(16px, 1.6vw, 20px);
  letter-spacing: 0.14em;
  color: var(--muted);
}

footer {
  position: relative;
  z-index: 1;
  padding: 26px;
  text-align: center;
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--faint);
}

/* ── small screens ── */

@media (max-width: 768px) {
  .blob { filter: blur(70px); }
  .badge { margin-bottom: 34px; padding: 9px 18px; font-size: 13px; }
  .title { letter-spacing: -0.01em; }
  .tagline { padding: 0 12px; }
}

/* ── reduced motion ── */

@media (prefers-reduced-motion: reduce) {
  .blob, .title { animation: none; }
}