:root {
  color-scheme: dark;
  --rose: #ff6f91;
  --coral: #ff9472;
  --gold: #ffd166;
  --mint: #8ee8d8;
  --ink: #130a11;
  --text: #fff7f8;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

html {
  overflow: hidden;
  background: var(--ink);
}

body {
  position: fixed;
  inset: 0;
  width: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--ink);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.intro {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 50% 46%, rgba(255, 111, 145, 0.2), transparent 28rem),
    linear-gradient(140deg, rgba(19, 10, 17, 0.96), rgba(48, 18, 27, 0.94), rgba(10, 43, 39, 0.96));
  transition: opacity 650ms ease, transform 650ms ease, visibility 650ms ease;
}

.intro::before,
.intro::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  pointer-events: none;
}

.intro::before {
  width: min(74vw, 28rem);
  aspect-ratio: 1;
  border: 1px solid rgba(255, 247, 248, 0.16);
  box-shadow:
    inset 0 0 34px rgba(255, 111, 145, 0.14),
    0 0 80px rgba(255, 209, 102, 0.1);
  animation: introRing 3.5s ease-in-out infinite;
}

.intro::after {
  width: 0.45rem;
  height: 0.45rem;
  background: var(--gold);
  box-shadow:
    8.2rem -5.4rem 0 rgba(255, 111, 145, 0.78),
    -7.5rem -3rem 0 rgba(142, 232, 216, 0.72),
    6rem 6.8rem 0 rgba(255, 148, 114, 0.72),
    -6.2rem 5.7rem 0 rgba(255, 247, 248, 0.62);
  animation: introDust 5s linear infinite;
}

.intro.is-hidden {
  opacity: 0;
  visibility: hidden;
  transform: scale(1.04);
  pointer-events: none;
}

.intro-button {
  position: relative;
  z-index: 1;
  width: min(12rem, calc(100vw - 2rem));
  min-height: 3.2rem;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 999px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.11);
  backdrop-filter: blur(16px);
  box-shadow: 0 24px 54px rgba(0, 0, 0, 0.3), 0 0 38px rgba(255, 111, 145, 0.24);
  cursor: pointer;
  font: 800 0.78rem/1 Inter, ui-sans-serif, system-ui, sans-serif;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

.intro-button:hover,
.intro-button:focus-visible {
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 209, 102, 0.7);
  transform: translateY(-2px);
  outline: none;
}

.intro-button:active {
  transform: translateY(1px) scale(0.99);
}

.scene {
  position: relative;
  height: 100svh;
  display: grid;
  place-items: center;
  isolation: isolate;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(20, 10, 17, 0.98), rgba(64, 19, 29, 0.9) 36%, rgba(15, 49, 45, 0.9) 72%, rgba(89, 29, 43, 0.98)),
    repeating-linear-gradient(115deg, rgba(255, 255, 255, 0.035) 0 1px, transparent 1px 18px);
}

.scene::before,
.scene::after {
  content: "";
  position: absolute;
  inset: -30%;
  z-index: -2;
  pointer-events: none;
}

.scene::before {
  background:
    conic-gradient(from 220deg at 50% 50%, rgba(255, 111, 145, 0.18), rgba(255, 209, 102, 0.14), rgba(142, 232, 216, 0.13), rgba(255, 148, 114, 0.18), rgba(255, 111, 145, 0.18));
  animation: silk 18s linear infinite;
  filter: saturate(1.2);
}

.scene::after {
  background:
    linear-gradient(90deg, transparent 0 12%, rgba(255, 255, 255, 0.08) 14%, transparent 16% 42%, rgba(255, 209, 102, 0.08) 45%, transparent 47% 100%);
  transform: rotate(-12deg);
  animation: shimmer 8s ease-in-out infinite alternate;
  mix-blend-mode: screen;
}

#sky {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

.love-core {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 0;
  width: clamp(11rem, 27vw, 24rem);
  height: clamp(11rem, 27vw, 24rem);
  opacity: 0;
  filter: blur(0.2px) drop-shadow(0 0 46px rgba(255, 111, 145, 0.22));
  transform: translate(-50%, -48%) rotate(-45deg) scale(0.68);
  transition: opacity 800ms ease, transform 900ms cubic-bezier(0.2, 0.9, 0.2, 1);
}

.love-core,
.love-core::before,
.love-core::after {
  background: linear-gradient(135deg, rgba(255, 111, 145, 0.16), rgba(255, 209, 102, 0.08), rgba(142, 232, 216, 0.13));
}

.love-core::before,
.love-core::after {
  content: "";
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
}

.love-core::before {
  top: -50%;
  left: 0;
}

.love-core::after {
  top: 0;
  left: 50%;
}

.scene.is-started .love-core {
  opacity: 1;
  transform: translate(-50%, -48%) rotate(-45deg) scale(1);
  animation: heartGlow 4.8s ease-in-out 900ms infinite;
}

.scene.is-open .love-core {
  opacity: 1;
  filter: blur(0.2px) drop-shadow(0 0 64px rgba(255, 209, 102, 0.28));
}

.message {
  position: relative;
  z-index: 1;
  width: min(92vw, 980px);
  padding: clamp(1.5rem, 5vw, 4rem);
  text-align: center;
  transform-style: preserve-3d;
  opacity: 0;
}

.scene.is-started .message {
  animation: float 5.5s ease-in-out infinite;
  opacity: 1;
}

.kicker,
.signature,
.secret {
  margin: 0;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  font-size: clamp(0.72rem, 2.2vw, 0.95rem);
  color: rgba(255, 247, 248, 0.74);
}

.kicker {
  opacity: 0;
  transform: translateY(0.35rem);
}

.scene.is-started .kicker {
  animation: fadeUp 900ms ease 150ms both;
}

h1 {
  margin: 0 0 0.8rem;
  display: grid;
  gap: clamp(0.1rem, 1vw, 0.45rem);
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0;
  overflow: visible;
  text-wrap: balance;
  text-shadow:
    0 0 18px rgba(255, 111, 145, 0.45),
    0 0 46px rgba(255, 209, 102, 0.18),
    0 14px 38px rgba(0, 0, 0, 0.42);
}

h1 span {
  display: block;
  padding: 0.04em 0 0.16em;
  margin: -0.04em 0 -0.12em;
  overflow: visible;
  font-size: clamp(3.35rem, 12.6vw, 9.2rem);
  line-height: 0.94;
  background: linear-gradient(90deg, #fff7f8, #ffd6dd 34%, #ffd166 58%, #8ee8d8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  opacity: 0;
  transform: translateY(0.9rem) scale(0.985);
}

.scene.is-started h1 span {
  animation: reveal 900ms cubic-bezier(0.2, 0.9, 0.2, 1) forwards;
}

.scene.is-started h1 span:nth-child(2) {
  animation-delay: 520ms;
}

.signature {
  opacity: 0;
}

.scene.is-started .signature {
  animation: fadeUp 900ms ease 1s both;
}

.surprise {
  position: absolute;
  left: 50%;
  bottom: clamp(1.35rem, 4vw, 2.5rem);
  width: min(15rem, calc(100vw - 2rem));
  min-height: 3.25rem;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 999px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(18px);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.24);
  cursor: pointer;
  transform: translateX(-50%);
  font: 700 0.82rem/1 Inter, ui-sans-serif, system-ui, sans-serif;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  opacity: 0;
  pointer-events: none;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

.scene.is-started .surprise {
  opacity: 1;
  pointer-events: auto;
  animation: buttonIn 700ms ease 1.1s both;
}

.surprise:hover,
.surprise:focus-visible {
  background: rgba(255, 255, 255, 0.17);
  border-color: rgba(255, 209, 102, 0.65);
  transform: translateX(-50%) translateY(-2px);
  outline: none;
}

.surprise:active {
  transform: translateX(-50%) translateY(1px) scale(0.99);
}

.secret {
  position: absolute;
  left: 50%;
  bottom: clamp(5.3rem, 11vw, 6.7rem);
  width: min(90vw, 38rem);
  text-align: center;
  opacity: 0;
  transform: translate(-50%, 0.75rem);
  transition: opacity 450ms ease, transform 450ms ease;
}

.scene.is-open .secret {
  opacity: 1;
  transform: translate(-50%, 0);
}

@keyframes introRing {
  0%,
  100% {
    transform: scale(0.94);
    opacity: 0.74;
  }

  50% {
    transform: scale(1.04);
    opacity: 1;
  }
}

@keyframes introDust {
  to {
    transform: rotate(360deg);
  }
}

@keyframes reveal {
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(0.7rem);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes buttonIn {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(0.8rem);
  }

  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0) rotateX(0deg);
  }

  50% {
    transform: translateY(-0.6rem) rotateX(2deg);
  }
}

@keyframes heartGlow {
  0%,
  100% {
    transform: translate(-50%, -48%) rotate(-45deg) scale(1);
  }

  50% {
    transform: translate(-50%, -48%) rotate(-45deg) scale(1.08);
  }
}

@keyframes silk {
  to {
    transform: rotate(360deg);
  }
}

@keyframes shimmer {
  from {
    opacity: 0.25;
    transform: translateX(-4%) rotate(-12deg);
  }

  to {
    opacity: 0.62;
    transform: translateX(4%) rotate(-12deg);
  }
}

@media (max-width: 680px) {
  .message {
    padding-inline: 1rem;
    transform: translateY(-1.5rem);
  }

  h1 span {
    font-size: clamp(3rem, 17vw, 5.45rem);
  }

  .kicker,
  .signature,
  .secret {
    letter-spacing: 0.16em;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 1ms !important;
  }
}