:root {
  --ink: #fffaf0;
  --card-bg: rgba(12, 18, 48, 0.55);
  --card-line: rgba(255, 255, 255, 0.18);
  --accent: #ffb7c5;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: #1b2a6b;
  color: var(--ink);
  font-family: ui-rounded, "SF Pro Rounded", "Segoe UI", system-ui, sans-serif;
}

#scene {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

#scene stop { transition: stop-color 2s ease; }

.cloud {
  animation: drift var(--d) linear infinite;
  animation-delay: var(--delay);
}

@keyframes drift {
  from { transform: translate(-200px, var(--y)); }
  to   { transform: translate(1800px, var(--y)); }
}

.star { animation: twinkle 3s ease-in-out infinite alternate; }

@keyframes twinkle {
  from { opacity: 0.25; }
  to   { opacity: 1; }
}

main {
  position: relative;
  text-align: center;
  padding-top: 9vh;
  pointer-events: none;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.35);
}

h1 {
  margin: 0;
  font-size: clamp(2.6rem, 9vw, 6.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

#greeting {
  display: inline-block;
  transition: opacity 0.4s ease, transform 0.4s ease;
}

#greeting.out {
  opacity: 0;
  transform: translateY(-0.3em);
}

.lang {
  margin: 0.4rem 0 0;
  font-size: 1rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.8;
}

.hint {
  margin-top: 1.2rem;
  font-size: 0.9rem;
  opacity: 0.6;
}

.card {
  position: fixed;
  right: 16px;
  bottom: 16px;
  min-width: 230px;
  padding: 12px 16px;
  border: 1px solid var(--card-line);
  border-radius: 14px;
  background: var(--card-bg);
  backdrop-filter: blur(8px);
  font: 13px/1.7 ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

.card div { display: flex; justify-content: space-between; gap: 16px; }
.card span { opacity: 0.6; }
.card b { font-weight: 600; }
#env.prod { color: #7dffb0; }
#env.dev { color: #ffd36e; }

.petal {
  position: fixed;
  width: 14px;
  height: 10px;
  background: var(--accent);
  border-radius: 14px 0 14px 0;
  pointer-events: none;
  animation: fall var(--t) cubic-bezier(.3, .1, .6, 1) forwards;
}

@keyframes fall {
  to {
    transform: translate(var(--dx), var(--dy)) rotate(var(--r));
    opacity: 0;
  }
}

@media (max-width: 520px) {
  .card { left: 16px; right: 16px; min-width: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .cloud, .star, .petal { animation: none; }
}