/* Her birthday (js/birthday.js): a night sky over the whole page, the greeting in the middle.
   The night keeps its own colors in both themes; the type is the site's. */

.birthday {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: grid;
  place-items: center;
  overflow: hidden;
  color: #f4efe6;
  background: rgb(16, 17, 21);
  cursor: pointer;
  opacity: 1;
  transition: opacity 1.4s ease;
  -webkit-tap-highlight-color: transparent;
  outline: none;
}
.birthday.lifting { opacity: 0; pointer-events: none; }
.birthday canvas { position: absolute; inset: 0; width: 100%; height: 100%; }

.bd-card {
  position: relative;
  display: grid;
  gap: 1rem;
  max-width: 46rem;
  padding: 16px;
  text-align: center;
  text-shadow: 0 0 18px rgba(16, 17, 21, 0.9), 0 0 4px rgba(16, 17, 21, 0.8);
}
.bd-card > *, .bd-hint { opacity: 0; transform: translateY(6px); transition: opacity 1.2s ease, transform 1.2s ease; }
.bd-card > .on, .bd-hint.on { opacity: 1; transform: none; }

.bd-title { font-size: clamp(2.1rem, 6vw, 3.6rem); font-weight: 380; line-height: 1.08; letter-spacing: -0.015em; }
.bd-line { max-width: 34rem; margin-inline: auto; font-size: clamp(1.1rem, 2.4vw, 1.4rem); font-style: italic; font-weight: 350; line-height: 1.42; color: #e2dbcf; text-wrap: balance; }
.bd-from { margin-top: 0.5rem; font-size: 1rem; color: #bdb6aa; }
.bd-from .name {
  display: block;
  margin-top: 0.25rem;
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", "Source Han Serif SC", "SimSun", serif;
  font-size: 1.35rem;
  letter-spacing: 0.1em;
  color: #f4efe6;
}
.bd-hint {
  position: absolute;
  left: 0;
  right: 0;
  bottom: max(24px, env(safe-area-inset-bottom));
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-align: center;
  color: #8d8a84;
}

/* Reduced motion: no fireworks (js/birthday.js), and the words simply appear. */
@media (prefers-reduced-motion: reduce) {
  .bd-card > *, .bd-hint { transition: none; transform: none; }
}