:root {
  color-scheme: dark;
  --ink: #f8f5ff;
  --muted: rgba(226, 221, 244, 0.62);
  --line: rgba(241, 203, 255, 0.18);
  --pink: #ff9fcf;
  --rose: #ff5fa9;
  --lilac: #c8a8ff;
  --blue: #89d7ff;
}

* { box-sizing: border-box; }

html, body { margin: 0; min-height: 100%; background: #070914; }

body {
  overflow: hidden;
  color: var(--ink);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

button { font: inherit; }

.gift-scene {
  position: relative;
  isolation: isolate;
  min-height: 100svh;
  overflow: hidden;
  background:
    radial-gradient(circle at 68% 34%, rgba(39, 178, 224, 0.12), transparent 30%),
    radial-gradient(circle at 13% 22%, rgba(54, 98, 171, 0.11), transparent 28%),
    linear-gradient(135deg, #050910 0%, #07101b 48%, #0a0a1d 100%);
}

#starfield, #particle-flower {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

#starfield { z-index: -4; opacity: 0.78; }
#particle-flower { z-index: -1; cursor: pointer; }

.ambient {
  position: absolute;
  z-index: -3;
  width: 42vw;
  height: 42vw;
  max-width: 600px;
  max-height: 600px;
  border-radius: 50%;
  filter: blur(48px);
  pointer-events: none;
  opacity: 0.24;
}

.ambient-a { top: 18%; left: 22%; background: #197eaa; opacity: 0.13; }
.ambient-b { right: 8%; bottom: 4%; background: #4054bc; opacity: 0.13; }

.code-backdrop {
  position: absolute;
  z-index: -2;
  top: 12%;
  right: 2.5%;
  width: min(43vw, 610px);
  display: grid;
  gap: 10px;
  padding: 22px 28px;
  border: 1px solid rgba(129, 215, 255, 0.1);
  border-radius: 18px;
  color: rgba(155, 226, 255, 0.24);
  background: linear-gradient(135deg, rgba(7, 23, 39, 0.38), rgba(12, 11, 38, 0.12));
  box-shadow: inset 0 0 55px rgba(75, 176, 255, 0.04), 0 0 80px rgba(33, 132, 190, 0.06);
  font: 500 clamp(10px, 1.15vw, 14px)/1.4 "Cascadia Code", Consolas, monospace;
  letter-spacing: 0.02em;
  transform: perspective(900px) rotateY(-8deg) rotateX(4deg);
  filter: blur(0.25px);
  opacity: 0.72;
  pointer-events: none;
  mask-image: linear-gradient(90deg, transparent 0%, #000 12%, #000 88%, transparent 100%);
}

.code-backdrop::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: repeating-linear-gradient(180deg, transparent 0 28px, rgba(122, 211, 255, 0.035) 29px 30px);
  pointer-events: none;
}

.code-backdrop span:nth-child(3),
.code-backdrop span:nth-child(7) { color: rgba(219, 239, 255, 0.32); }

.message-card {
  position: absolute;
  z-index: 2;
  left: clamp(24px, 8vw, 124px);
  bottom: clamp(62px, 11vh, 126px);
  width: min(350px, calc(100vw - 48px));
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.35);
  pointer-events: none;
}

.eyebrow {
  margin: 0 0 14px;
  color: rgba(236, 214, 255, 0.62);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.34em;
}

h1 {
  margin: 0;
  font-family: Georgia, "Songti SC", serif;
  font-size: clamp(48px, 7vw, 78px);
  font-weight: 400;
  letter-spacing: 0.08em;
  line-height: 1;
  background: linear-gradient(120deg, #fff 15%, #c9f6ff 48%, #b9c1ff 90%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.message {
  min-height: 28px;
  margin: 22px 0 18px;
  color: rgba(250, 243, 255, 0.84);
  font-size: 15px;
  letter-spacing: 0.1em;
  line-height: 1.8;
}

.divider { display: flex; align-items: center; gap: 9px; width: 168px; }
.divider span { height: 1px; flex: 1; background: linear-gradient(90deg, transparent, var(--line)); }
.divider span:last-child { background: linear-gradient(90deg, var(--line), transparent); }
.divider i { width: 5px; height: 5px; border-radius: 50%; background: var(--pink); box-shadow: 0 0 14px var(--pink); }

.hint {
  margin: 17px 0 16px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.08em;
}

#bloom-button {
  pointer-events: auto;
  border: 1px solid rgba(135, 224, 255, 0.46);
  border-radius: 999px;
  padding: 10px 19px;
  color: #fff7fd;
  background: rgba(56, 191, 235, 0.11);
  box-shadow: inset 0 0 22px rgba(54, 206, 255, 0.08), 0 0 26px rgba(63, 177, 255, 0.1);
  cursor: pointer;
  transition: 220ms ease;
}

#bloom-button:hover, #bloom-button:focus-visible {
  outline: none;
  border-color: rgba(208, 246, 255, 0.9);
  background: rgba(56, 191, 235, 0.22);
  transform: translateY(-2px);
  box-shadow: 0 0 32px rgba(63, 196, 255, 0.24);
}

.signature, .corner-mark {
  position: absolute;
  z-index: 2;
  color: rgba(226, 218, 243, 0.42);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.signature { left: clamp(24px, 8vw, 124px); top: 30px; }
.corner-mark { right: 34px; top: 30px; }

@media (max-width: 720px) {
  .gift-scene { min-height: 100svh; }
  .message-card { left: 24px; bottom: 42px; }
  .signature { left: 24px; top: 24px; font-size: 9px; }
  .corner-mark { right: 24px; top: 24px; }
  .code-backdrop {
    top: 10%;
    right: -17%;
    width: 78vw;
    padding: 16px 20px;
    gap: 7px;
    opacity: 0.42;
    transform: perspective(700px) rotateY(-7deg) rotateX(3deg) scale(0.9);
  }
  .hint { margin-top: 14px; }
  #bloom-button { padding: 9px 17px; font-size: 13px; }
}

@media (prefers-reduced-motion: reduce) {
  #particle-flower { cursor: default; }
}