:root {
  color-scheme: dark;
  --bg: #050505;
  --ink: #fff8ef;
  --muted: #d7c8bf;
  --line: rgba(255, 248, 239, 0.28);
  --gold: #e8d19b;
  --rose: #f4d7dc;
  --panel: rgba(17, 17, 17, 0.78);
  --shadow: 0 22px 70px rgba(0, 0, 0, 0.44);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 50% 0%, rgba(232, 209, 155, 0.18), transparent 28rem),
    radial-gradient(circle at 15% 65%, rgba(244, 215, 220, 0.14), transparent 18rem),
    var(--bg);
  color: var(--ink);
  font-family: Montserrat, system-ui, sans-serif;
}

body.is-locked {
  overflow: hidden;
}

.invitation {
  min-height: 100vh;
}

.cover {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: grid;
  place-items: center;
  overflow: hidden;
  padding: 1.25rem;
  background: #030303;
  transition:
    opacity 700ms ease,
    visibility 700ms ease;
}

.cover::before,
.cover::after {
  position: absolute;
  inset: 1rem;
  z-index: 2;
  pointer-events: none;
  content: "";
  border: 1px solid rgba(255, 255, 255, 0.28);
}

.cover::after {
  inset: 1.45rem;
  border-color: rgba(232, 209, 155, 0.16);
}

.envelope {
  position: absolute;
  inset: 0;
  transform-style: preserve-3d;
  perspective: 1200px;
}

.envelope__shine {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, transparent 0 38%, rgba(255, 255, 255, 0.08) 44%, transparent 50% 100%),
    radial-gradient(circle at 8% 40%, rgba(255, 255, 255, 0.75), transparent 0.35rem),
    radial-gradient(circle at 94% 35%, rgba(255, 255, 255, 0.55), transparent 0.28rem),
    radial-gradient(circle at 72% 84%, rgba(255, 255, 255, 0.45), transparent 0.22rem);
  opacity: 0.8;
}

.envelope__flap,
.envelope__panel {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, transparent 49.5%, rgba(255, 255, 255, 0.75) 50%, transparent 50.7%),
    linear-gradient(225deg, transparent 49.5%, rgba(255, 255, 255, 0.75) 50%, transparent 50.7%),
    linear-gradient(120deg, #070707, #151515 48%, #060606);
  transition:
    transform 1100ms cubic-bezier(0.22, 0.9, 0.22, 1),
    opacity 800ms ease;
}

.envelope__flap--top {
  clip-path: polygon(0 0, 100% 0, 50% 42%);
  transform-origin: top center;
}

.envelope__flap--bottom {
  clip-path: polygon(0 100%, 100% 100%, 50% 58%);
  transform-origin: bottom center;
}

.envelope__panel--left {
  clip-path: polygon(0 0, 50% 50%, 0 100%);
  transform-origin: left center;
}

.envelope__panel--right {
  clip-path: polygon(100% 0, 50% 50%, 100% 100%);
  transform-origin: right center;
}

.letter-preview {
  position: absolute;
  left: 50%;
  top: 54%;
  width: min(26rem, 82vw);
  min-height: 19rem;
  display: grid;
  place-items: center;
  gap: 1rem;
  padding: 3rem 2rem;
  text-align: center;
  background: linear-gradient(180deg, #fffaf3, #eadcc8);
  border-radius: 0.4rem;
  box-shadow: var(--shadow);
  color: #18120d;
  opacity: 0;
  transform: translate(-50%, 40%) scale(0.96);
  transition:
    opacity 900ms ease 280ms,
    transform 1100ms cubic-bezier(0.22, 0.9, 0.22, 1) 280ms;
}

.letter-preview span {
  font-family: Cinzel, serif;
  letter-spacing: 0.12em;
}

.letter-preview strong {
  font-family: "Great Vibes", cursive;
  font-size: clamp(2.4rem, 10vw, 4.8rem);
  font-weight: 400;
}

.cover__copy {
  position: relative;
  z-index: 3;
  display: grid;
  justify-items: center;
  gap: 1.15rem;
  width: min(28rem, 92vw);
  text-align: center;
}

.eyebrow {
  margin: 0;
  font-family: Cinzel, serif;
  font-size: clamp(0.78rem, 2.6vw, 0.95rem);
  font-weight: 700;
  letter-spacing: 0.26em;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  font-family: "Great Vibes", cursive;
  font-weight: 400;
  line-height: 0.95;
  text-shadow: 0 0 18px rgba(244, 215, 220, 0.8);
}

h1 {
  font-size: clamp(3.6rem, 17vw, 7rem);
}

.seal {
  position: relative;
  display: grid;
  place-items: center;
  width: clamp(8.5rem, 34vw, 12rem);
  aspect-ratio: 1;
  border: 0;
  border-radius: 50%;
  color: #1b1712;
  cursor: pointer;
  background:
    radial-gradient(circle at 34% 28%, #ffffff 0 0.45rem, transparent 0.5rem),
    repeating-conic-gradient(from 8deg, #f8f8f8 0 7deg, #cfcfcf 8deg 11deg, #ffffff 12deg 18deg),
    radial-gradient(circle, #f2f2f2, #a8a8a8);
  box-shadow:
    0 0 28px rgba(255, 255, 255, 0.44),
    0 22px 40px rgba(0, 0, 0, 0.4);
  transition:
    transform 220ms ease,
    box-shadow 220ms ease;
}

.seal:hover,
.seal:focus-visible {
  transform: translateY(-0.18rem) scale(1.025);
  box-shadow:
    0 0 42px rgba(255, 255, 255, 0.62),
    0 26px 48px rgba(0, 0, 0, 0.48);
  outline: none;
}

.seal__rings {
  position: absolute;
  inset: -0.6rem;
  border: 1px solid rgba(255, 255, 255, 0.38);
  border-radius: inherit;
  animation: pulse 1700ms ease-in-out infinite;
}

.seal__text {
  padding: 0.55rem 0.75rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.cover__hint {
  margin: 0;
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

.content {
  min-height: 100vh;
  padding: clamp(3rem, 8vw, 5rem) 1rem;
  opacity: 0;
  transform: translateY(1.5rem);
  transition:
    opacity 900ms ease 720ms,
    transform 900ms ease 720ms;
}

.content > * {
  width: min(45rem, 100%);
  margin-inline: auto;
}

.hero {
  min-height: 82vh;
  display: grid;
  align-content: center;
  gap: 1.25rem;
  text-align: center;
}

h2 {
  font-size: clamp(4.5rem, 20vw, 9rem);
}

.date {
  margin: 0;
  font-family: Cinzel, serif;
  font-size: clamp(1rem, 4vw, 1.45rem);
  letter-spacing: 0.22em;
}

.intro {
  margin: 0 auto;
  max-width: 36rem;
  color: var(--muted);
  font-size: clamp(1rem, 3.8vw, 1.15rem);
  line-height: 1.85;
}

.parents,
.countdown,
.rsvp {
  margin-bottom: 1rem;
  padding: clamp(1.5rem, 5vw, 2.5rem);
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  background: var(--panel);
  box-shadow: var(--shadow);
  text-align: center;
}

.parents p,
.countdown p,
.rsvp p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.parents strong {
  display: block;
  margin-top: 0.8rem;
  font-family: "Great Vibes", cursive;
  font-size: clamp(2.5rem, 10vw, 4rem);
  font-weight: 400;
}

.parents span {
  display: block;
  margin-top: 0.5rem;
  color: var(--gold);
  font-family: Cinzel, serif;
  font-size: 1.5rem;
}

.countdown__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.7rem;
  margin-top: 1.25rem;
}

.countdown__grid div {
  min-width: 0;
  padding: 1rem 0.4rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 0.45rem;
  background: rgba(255, 255, 255, 0.06);
}

.countdown__grid strong {
  display: block;
  font-size: clamp(1.5rem, 7vw, 2.35rem);
}

.countdown__grid span {
  display: block;
  margin-top: 0.25rem;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.details {
  display: grid;
  gap: 1rem;
  margin-block: 1rem;
}

.details article {
  padding: clamp(1.2rem, 5vw, 1.7rem);
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  background: rgba(255, 255, 255, 0.06);
}

.icon {
  display: inline-grid;
  place-items: center;
  width: 2.3rem;
  aspect-ratio: 1;
  border: 1px solid var(--gold);
  border-radius: 50%;
  color: var(--gold);
  font-family: Cinzel, serif;
  font-size: 0.75rem;
  font-weight: 700;
}

h3 {
  margin: 0.75rem 0 0.5rem;
  font-family: Cinzel, serif;
  font-size: 1rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.details p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

a {
  color: var(--gold);
}

.button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 3rem;
  margin-top: 1.25rem;
  padding: 0.85rem 1.15rem;
  border-radius: 999px;
  background: var(--ink);
  color: #15110d;
  font-weight: 800;
  text-decoration: none;
}

.invitation.is-open .cover {
  visibility: hidden;
  opacity: 0;
  transition-delay: 1250ms;
}

.invitation.is-open .cover__copy {
  opacity: 0;
  transform: translateY(-1.5rem);
  transition:
    opacity 520ms ease,
    transform 520ms ease;
}

.invitation.is-open .envelope__flap--top {
  transform: rotateX(72deg) translateY(-14%);
}

.invitation.is-open .envelope__flap--bottom {
  transform: rotateX(-62deg) translateY(14%);
}

.invitation.is-open .envelope__panel--left {
  transform: rotateY(-48deg) translateX(-12%);
  opacity: 0.64;
}

.invitation.is-open .envelope__panel--right {
  transform: rotateY(48deg) translateX(12%);
  opacity: 0.64;
}

.invitation.is-open .letter-preview {
  opacity: 1;
  transform: translate(-50%, -46%) scale(1);
}

.invitation.is-open .content {
  opacity: 1;
  transform: none;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 0.35;
    transform: scale(1);
  }

  50% {
    opacity: 0.8;
    transform: scale(1.06);
  }
}

@media (min-width: 760px) {
  .details {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 420px) {
  .countdown__grid {
    gap: 0.45rem;
  }

  .countdown__grid div {
    padding-inline: 0.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html:not([data-motion="on"]) *,
  html:not([data-motion="on"]) *::before,
  html:not([data-motion="on"]) *::after {
    scroll-behavior: auto !important;
    animation-duration: 1ms !important;
    transition-duration: 1ms !important;
  }
}