:root {
  --bg-start: #f4e9d7;
  --bg-end: #e8d8c2;
  --card-bg: #fff8eb;
  --text-main: #6f4a2b;
  --text-soft: #8d6a49;
  --gold: #d2ab67;
  --gold-dark: #b98d47;
  --shadow: 0 18px 40px rgba(83, 53, 28, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Playfair Display", serif;
  color: var(--text-main);
  background: linear-gradient(145deg, var(--bg-start), var(--bg-end));
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.5;
}

.background-decor {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.shape {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.65), rgba(210, 171, 103, 0.25));
  animation: floatShape 8s ease-in-out infinite;
}

.shape-1 {
  width: 140px;
  height: 140px;
  top: 6%;
  left: 4%;
}

.shape-2 {
  width: 200px;
  height: 200px;
  bottom: 12%;
  right: 8%;
  animation-delay: 1.6s;
}

.shape-3 {
  width: 90px;
  height: 90px;
  top: 42%;
  right: 18%;
  animation-delay: 0.8s;
}

.welcome-screen {
  min-height: 100vh;
  display: grid;
  place-items: center;
  position: relative;
  z-index: 1;
  padding: 20px;
  text-align: center;
}

.envelope-scene {
  width: min(92vw, 460px);
}

.envelope-stage {
  perspective: 1600px;
}

.envelope-rotator {
  position: relative;
  width: 100%;
  height: 280px;
  margin: 12px auto 22px;
  transform-style: preserve-3d;
  animation: envelopeTurn 1.8s 0.25s cubic-bezier(0.22, 0.61, 0.36, 1) both;
}

.envelope-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
}

.envelope-front {
  transform: rotateY(180deg);
}

.envelope-back-shell {
  position: absolute;
  inset: 0;
  border-radius: 14px;
  background: linear-gradient(180deg, #ebc991, #d8af71);
  border: 1px solid rgba(185, 141, 71, 0.55);
  box-shadow: 0 15px 34px rgba(83, 53, 28, 0.22);
}

.back-seam {
  position: absolute;
  background: rgba(151, 106, 54, 0.5);
}

.seam-left {
  left: 50%;
  bottom: 0;
  width: 1px;
  height: 64%;
  transform: rotate(34deg);
  transform-origin: bottom;
}

.seam-right {
  left: 50%;
  bottom: 0;
  width: 1px;
  height: 64%;
  transform: rotate(-34deg);
  transform-origin: bottom;
}

.seam-top {
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  width: 100%;
}

.envelope {
  position: relative;
  width: 100%;
  height: 280px;
}

.envelope-pocket {
  position: absolute;
  inset: 0;
  border-radius: 14px;
  background: linear-gradient(180deg, #f4dfbe, #e8c998);
  border: 1px solid rgba(185, 141, 71, 0.55);
  box-shadow: 0 15px 34px rgba(83, 53, 28, 0.22);
  z-index: 2;
}

.envelope-pocket::before,
.envelope-pocket::after {
  content: "";
  position: absolute;
  bottom: 0;
  width: 50%;
  height: 62%;
  background: rgba(233, 206, 159, 0.92);
}

.envelope-pocket::before {
  left: 0;
  clip-path: polygon(0 0, 100% 100%, 0 100%);
}

.envelope-pocket::after {
  right: 0;
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
}

.envelope-flap {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 58%;
  background: linear-gradient(180deg, #efd3a7, #dfba81);
  clip-path: polygon(0 0, 100% 0, 50% 100%);
  transform-origin: top;
  transition: transform 0.9s ease;
  border-top-left-radius: 14px;
  border-top-right-radius: 14px;
  z-index: 4;
}

.seal {
  position: absolute;
  left: 50%;
  top: 126px;
  transform: translateX(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 28%, #edd6bb, #cb9e63);
  border: 2px solid rgba(149, 103, 49, 0.46);
  box-shadow: 0 7px 14px rgba(72, 42, 13, 0.25);
  z-index: 5;
}

.envelope.opening .envelope-flap {
  transform: rotateX(176deg);
}

.welcome-screen .primary-btn {
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
}

.welcome-screen .primary-btn.ready {
  pointer-events: auto;
  animation: revealOpenButton 0.5s ease forwards;
}

.eyebrow {
  margin: 0;
  color: var(--text-soft);
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 3px;
}

main {
  position: relative;
  z-index: 1;
  padding: 40px 0 70px;
}

.hidden {
  display: none;
}

.invitation-section,
.countdown-section,
.rsvp-section {
  width: 100%;
  padding: 18px 14px;
}

.invitation-section {
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  place-items: center;
}

.card {
  max-width: 420px;
  width: 92%;
  margin: auto;
  padding: 40px 24px;
  background: linear-gradient(180deg, #fffdf9 0%, #fff8ef 100%);
  border: 1px solid rgba(210, 171, 103, 0.62);
  border-radius: 24px;
  box-shadow: var(--shadow);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  inset: 12px;
  border: 1px solid rgba(185, 141, 71, 0.28);
  border-radius: 16px;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(185, 141, 71, 0.18) 50%, transparent 50%) 0 0 / 12px 1px repeat-x,
    linear-gradient(90deg, rgba(185, 141, 71, 0.18) 50%, transparent 50%) 0 100% / 12px 1px repeat-x;
}

.card::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 8% 9%, rgba(184, 157, 169, 0.45) 0, rgba(184, 157, 169, 0.18) 12%, transparent 24%),
    radial-gradient(circle at 15% 6%, rgba(215, 196, 206, 0.44) 0, rgba(215, 196, 206, 0.15) 10%, transparent 22%),
    radial-gradient(circle at 91% 8%, rgba(176, 161, 181, 0.42) 0, rgba(176, 161, 181, 0.17) 12%, transparent 23%),
    radial-gradient(circle at 84% 5%, rgba(218, 193, 203, 0.4) 0, rgba(218, 193, 203, 0.15) 10%, transparent 22%),
    radial-gradient(circle at 9% 92%, rgba(174, 191, 180, 0.34) 0, rgba(174, 191, 180, 0.12) 11%, transparent 22%),
    radial-gradient(circle at 91% 94%, rgba(187, 198, 184, 0.32) 0, rgba(187, 198, 184, 0.12) 11%, transparent 22%),
    linear-gradient(rgba(132, 111, 83, 0.24), rgba(132, 111, 83, 0.24)) 12% 0 / 1px 56px no-repeat,
    linear-gradient(rgba(132, 111, 83, 0.24), rgba(132, 111, 83, 0.24)) 28% 0 / 1px 52px no-repeat,
    linear-gradient(rgba(132, 111, 83, 0.24), rgba(132, 111, 83, 0.24)) 72% 0 / 1px 52px no-repeat,
    linear-gradient(rgba(132, 111, 83, 0.24), rgba(132, 111, 83, 0.24)) 88% 0 / 1px 56px no-repeat,
    radial-gradient(circle at 12% 56px, rgba(224, 196, 142, 0.6) 0, rgba(224, 196, 142, 0.28) 8px, transparent 10px),
    radial-gradient(circle at 28% 52px, rgba(224, 196, 142, 0.55) 0, rgba(224, 196, 142, 0.25) 8px, transparent 10px),
    radial-gradient(circle at 72% 52px, rgba(224, 196, 142, 0.55) 0, rgba(224, 196, 142, 0.25) 8px, transparent 10px),
    radial-gradient(circle at 88% 56px, rgba(224, 196, 142, 0.6) 0, rgba(224, 196, 142, 0.28) 8px, transparent 10px),
    radial-gradient(140px 52px at 50% 1%, rgba(181, 199, 174, 0.26), transparent 72%);
  pointer-events: none;
  z-index: 0;
}

.card > * {
  position: relative;
  z-index: 1;
}

.blessing-line {
  margin: 10px 0 8px;
  font-size: 0.84rem;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: rgba(120, 84, 49, 0.82);
}

.script-line {
  margin: 0 0 4px;
  font-family: "Great Vibes", cursive;
  font-size: 2.3rem;
  color: var(--gold-dark);
}

.subtext {
  margin: 2px 0;
  color: var(--text-soft);
  font-size: 0.95rem;
}

.couple-name {
  margin: 12px 0 0;
  font-size: 2rem;
  letter-spacing: 2px;
}

.ampersand {
  margin: 3px 0;
  font-family: "Great Vibes", cursive;
  font-size: 2.2rem;
  color: var(--gold-dark);
}

.name-arch {
  margin: 18px auto 8px;
  padding: 16px 10px 8px;
  max-width: 270px;
  border: 1px solid rgba(185, 141, 71, 0.4);
  border-radius: 140px 140px 16px 16px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.55), rgba(255, 248, 235, 0.42));
}

.islamic-ornament {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: rgba(148, 108, 59, 0.75);
}

.islamic-ornament.top {
  margin: 4px 0 12px;
}

.islamic-ornament.bottom {
  margin: 18px 0 0;
}

.islamic-ornament .line {
  width: 58px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(148, 108, 59, 0.65), transparent);
}

.islamic-ornament .star {
  font-size: 0.84rem;
  line-height: 1;
}

.islamic-ornament .star::before {
  content: "*";
}

.islamic-ornament .moon {
  position: relative;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1.5px solid rgba(148, 108, 59, 0.75);
}

.islamic-ornament .moon::after {
  content: "";
  position: absolute;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #fff8ec;
  top: 0;
  left: 4px;
}

.details {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid rgba(185, 141, 71, 0.36);
  border-bottom: 1px solid rgba(185, 141, 71, 0.22);
  padding-bottom: 8px;
}

.detail-block {
  margin-top: 14px;
}

.detail-block h3 {
  margin: 0;
  color: var(--gold-dark);
  font-size: 0.82rem;
  letter-spacing: 2px;
}

.detail-block p {
  margin: 4px 0;
  font-size: 1rem;
}

.btn {
  display: inline-block;
  border: none;
  border-radius: 999px;
  padding: 13px 20px;
  font-family: inherit;
  font-size: 0.95rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}

.primary-btn,
.location-btn {
  border: 1px solid rgba(255, 255, 255, 0.45);
  margin-top: 22px;
  background: linear-gradient(180deg, #e1bf87, #c89d5d);
  color: #fffdf8;
  box-shadow: 0 10px 20px rgba(94, 59, 26, 0.2);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 22px rgba(94, 59, 26, 0.25);
}

.section-inner {
  max-width: 700px;
  width: 92%;
  margin: 0 auto;
  background: rgba(255, 248, 235, 0.86);
  border: 1px solid rgba(210, 171, 103, 0.45);
  border-radius: 20px;
  padding: 30px 20px;
  box-shadow: 0 10px 26px rgba(83, 53, 28, 0.15);
  text-align: center;
}

.section-inner h2 {
  margin: 0 0 18px;
  font-size: clamp(1.6rem, 4vw, 2rem);
}

.countdown-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(90px, 1fr));
  gap: 12px;
}

.time-box {
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(185, 141, 71, 0.3);
  border-radius: 14px;
  padding: 16px 10px;
}

.time-box span {
  display: block;
  font-size: clamp(1.6rem, 5vw, 2rem);
  font-weight: 700;
}

.time-box p {
  margin: 4px 0 0;
  font-size: 0.85rem;
  color: var(--text-soft);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.rsvp-card form {
  display: grid;
  gap: 10px;
  text-align: left;
}

.rsvp-card label {
  font-size: 0.92rem;
  color: var(--text-soft);
}

.rsvp-card input {
  border: 1px solid rgba(185, 141, 71, 0.45);
  border-radius: 12px;
  padding: 11px 12px;
  background: #fffdf8;
  color: var(--text-main);
  font: inherit;
}

.rsvp-card input:focus {
  outline: 2px solid rgba(210, 171, 103, 0.4);
  border-color: var(--gold-dark);
}

.rsvp-card button {
  margin-top: 10px;
}

.rsvp-message {
  min-height: 20px;
  margin: 6px 0 0;
  font-size: 0.9rem;
  color: var(--gold-dark);
  text-align: center;
}

.fade-in {
  animation: fadeIn 1s ease both;
}

.slide-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.75s ease, transform 0.75s ease;
}

.slide-up.visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes envelopeTurn {
  from {
    transform: rotateY(0deg);
  }
  to {
    transform: rotateY(180deg);
  }
}

@keyframes revealOpenButton {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }
}

@keyframes floatShape {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-14px);
  }
}

@media (max-width: 768px) {
  main {
    padding: 28px 0 36px;
  }

  .envelope-rotator {
    height: 260px;
  }

  .envelope {
    height: 260px;
  }

  .card {
    padding: 34px 20px;
  }

  .couple-name {
    font-size: 1.8rem;
  }

  .btn {
    width: 100%;
  }

}

@media (max-width: 480px) {
  main {
    padding: 20px 0 24px;
  }

  .envelope-rotator {
    height: 230px;
  }

  .envelope {
    height: 230px;
  }

  .seal {
    width: 42px;
    height: 42px;
    top: 110px;
  }

  .script-line {
    font-size: 2rem;
  }

  .name-arch {
    max-width: 240px;
    padding-top: 14px;
  }

  .blessing-line {
    font-size: 0.72rem;
    letter-spacing: 1px;
  }

  .card::after {
    background:
      radial-gradient(circle at 8% 8%, rgba(184, 157, 169, 0.32) 0, rgba(184, 157, 169, 0.1) 12%, transparent 22%),
      radial-gradient(circle at 90% 8%, rgba(176, 161, 181, 0.3) 0, rgba(176, 161, 181, 0.1) 12%, transparent 22%),
      radial-gradient(circle at 9% 92%, rgba(174, 191, 180, 0.24) 0, rgba(174, 191, 180, 0.1) 11%, transparent 20%),
      radial-gradient(circle at 91% 94%, rgba(187, 198, 184, 0.24) 0, rgba(187, 198, 184, 0.1) 11%, transparent 20%),
      linear-gradient(rgba(132, 111, 83, 0.2), rgba(132, 111, 83, 0.2)) 18% 0 / 1px 46px no-repeat,
      linear-gradient(rgba(132, 111, 83, 0.2), rgba(132, 111, 83, 0.2)) 82% 0 / 1px 46px no-repeat,
      radial-gradient(circle at 18% 46px, rgba(224, 196, 142, 0.46) 0, rgba(224, 196, 142, 0.2) 8px, transparent 10px),
      radial-gradient(circle at 82% 46px, rgba(224, 196, 142, 0.46) 0, rgba(224, 196, 142, 0.2) 8px, transparent 10px);
  }

  .subtext,
  .detail-block p {
    font-size: 0.9rem;
  }

  .detail-block h3 {
    font-size: 0.76rem;
  }

  .time-box {
    padding: 14px 8px;
  }

  .section-inner {
    padding: 24px 14px;
  }

  .rsvp-card input {
    font-size: 0.95rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .envelope-rotator,
  .welcome-screen .primary-btn {
    animation: none;
  }

  .welcome-screen .primary-btn {
    opacity: 1;
    transform: none;
    pointer-events: auto;
  }
}