:root {
  --pink: #ff8db4;
  --hot-pink: #f35f92;
  --soft-pink: #ffd3df;
  --cream: #fff1d8;
  --white: #fffafc;
  --shadow: rgba(234, 83, 132, 0.32);
  --text: #d94f80;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
  color: var(--text);
  background: #ffd0df;
}

button {
  font: inherit;
}

.app,
.screen {
  position: relative;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

.screen[hidden] {
  display: none;
}

.dream-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 50% 48%, rgba(255, 250, 220, 0.96) 0 18%, rgba(255, 241, 216, 0.72) 28%, transparent 54%),
    radial-gradient(circle at 13% 77%, rgba(255, 255, 255, 0.76) 0 12%, transparent 24%),
    radial-gradient(circle at 90% 84%, rgba(255, 255, 255, 0.6) 0 15%, transparent 28%),
    linear-gradient(135deg, #ffc3d3 0%, #ffd8e2 34%, #fff1df 52%, #ffc4d9 100%);
}

.dream-bg::before,
.dream-bg::after {
  content: "";
  position: absolute;
  left: -6vw;
  right: -6vw;
  bottom: -9vh;
  height: 38vh;
  background:
    radial-gradient(circle at 4% 66%, rgba(255, 255, 255, 0.72) 0 7%, transparent 8%),
    radial-gradient(circle at 12% 58%, rgba(255, 255, 255, 0.68) 0 8%, transparent 9%),
    radial-gradient(circle at 23% 72%, rgba(255, 247, 250, 0.78) 0 9%, transparent 10%),
    radial-gradient(circle at 37% 65%, rgba(255, 255, 255, 0.6) 0 8%, transparent 9%),
    radial-gradient(circle at 55% 76%, rgba(255, 255, 255, 0.7) 0 11%, transparent 12%),
    radial-gradient(circle at 72% 67%, rgba(255, 246, 250, 0.82) 0 10%, transparent 11%),
    radial-gradient(circle at 86% 75%, rgba(255, 255, 255, 0.7) 0 12%, transparent 13%),
    radial-gradient(circle at 98% 62%, rgba(255, 255, 255, 0.62) 0 8%, transparent 9%);
  filter: blur(1px);
}

.dream-bg::after {
  top: -18vh;
  bottom: auto;
  opacity: 0.28;
  transform: rotate(180deg);
}

.verify-screen::before,
.celebration-screen::before {
  content: "★  ✦   ♡     ✧       ★     ♡    ✦       ★";
  position: absolute;
  inset: 8vh 2vw auto;
  z-index: 1;
  color: rgba(255, 255, 255, 0.9);
  font-size: clamp(28px, 4vw, 70px);
  letter-spacing: 4vw;
  text-shadow: 0 0 18px #fff, 0 0 32px rgba(255, 203, 118, 0.9);
  pointer-events: none;
}

.verify-button {
  position: absolute;
  left: 50%;
  top: 52%;
  z-index: 2;
  min-width: min(34vw, 560px);
  transform: translate(-50%, -50%);
  border: 6px solid rgba(255, 255, 255, 0.82);
  border-radius: 999px;
  padding: 32px 82px;
  color: #e95d8f;
  font-size: clamp(34px, 4.3vw, 68px);
  font-weight: 900;
  letter-spacing: 0.08em;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.52), rgba(255, 154, 187, 0.52)),
    rgba(255, 201, 216, 0.68);
  box-shadow:
    inset 0 10px 24px rgba(255, 255, 255, 0.65),
    inset 0 -18px 38px rgba(255, 114, 154, 0.32),
    0 28px 50px rgba(238, 76, 130, 0.36),
    0 0 46px rgba(255, 255, 255, 0.86);
  cursor: pointer;
  text-shadow: 0 3px 0 rgba(255, 255, 255, 0.9), 0 8px 18px rgba(218, 75, 120, 0.22);
  transition: transform 180ms ease, box-shadow 180ms ease;
  animation: buttonFloat 2.6s ease-in-out infinite;
}

.verify-button:hover {
  transform: translate(-50%, -53%) scale(1.03);
  box-shadow:
    inset 0 10px 24px rgba(255, 255, 255, 0.72),
    inset 0 -18px 38px rgba(255, 114, 154, 0.34),
    0 32px 58px rgba(238, 76, 130, 0.42),
    0 0 58px rgba(255, 255, 255, 0.98);
}

.button-spark {
  display: inline-block;
  margin: 0 0.18em;
  color: #fff;
  font-size: 0.62em;
  text-shadow: 0 0 16px #fff, 0 0 26px #ff8ab4;
}

.leaving {
  animation: fadeAway 640ms ease forwards;
}

.topbar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 8;
  height: 88px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 38px;
  background: rgba(255, 238, 245, 0.78);
  border-bottom: 1px wavy rgba(255, 255, 255, 0.65);
  backdrop-filter: blur(10px);
}

.cloud-logo {
  width: 68px;
  height: 42px;
  position: relative;
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 26px;
  font-weight: 900;
  border-radius: 999px;
  background: #f98daf;
  box-shadow: 18px -9px 0 -2px #f98daf, 33px 1px 0 -5px #f98daf, 0 8px 18px rgba(226, 89, 132, 0.25);
}

.top-actions {
  display: flex;
  gap: 20px;
}

.icon-button {
  width: 42px;
  height: 42px;
  border: 0;
  color: #f184aa;
  background: transparent;
  font-size: 36px;
  font-weight: 800;
  line-height: 1;
  cursor: pointer;
  text-shadow: 0 4px 10px rgba(235, 112, 153, 0.2);
  transition: transform 160ms ease, color 160ms ease;
}

.icon-button:hover,
.icon-button.active {
  color: #e85f91;
  transform: translateY(-2px) scale(1.08);
}

.decor-layer {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
}

.decor-item {
  position: absolute;
  left: var(--x);
  top: var(--y);
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--size);
  text-shadow: 0 0 14px #fff, 0 0 22px rgba(255, 144, 179, 0.8);
  animation: twinkle 2.8s ease-in-out var(--delay) infinite;
}

.photo-stage {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
}

.polaroid-card {
  position: absolute;
  left: var(--x);
  top: -32vh;
  width: clamp(116px, 10.5vw, 192px);
  margin: 0;
  padding: 12px 12px 30px;
  background: linear-gradient(180deg, #fff 0%, #fff8fb 100%);
  border-radius: 4px;
  box-shadow: 0 18px 36px rgba(195, 84, 119, 0.24), inset 0 0 0 1px rgba(255, 196, 215, 0.35);
  transform: translate3d(-50%, -40vh, 0) rotate(var(--rotate)) scale(var(--scale));
  opacity: 0;
  animation:
    photoDrop 1600ms cubic-bezier(0.16, 0.88, 0.24, 1.13) var(--delay) forwards,
    photoSway 5s ease-in-out calc(var(--delay) + 1500ms) infinite;
}

.polaroid-card.back {
  filter: blur(2px);
  opacity: 0.72;
}

.polaroid-card.mid {
  filter: blur(0.6px);
}

.polaroid-card img {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 3px;
  background: #ffdfe9;
}

.polaroid-card figcaption {
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  color: #f189a9;
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.polaroid-card figcaption span {
  font-size: 24px;
  line-height: 0.8;
}

.polaroid-card.placed {
  top: var(--y);
  opacity: 1;
  transform: translate3d(-50%, 0, 0) rotate(var(--rotate)) scale(var(--scale));
  animation: photoSway 5s ease-in-out infinite;
}

.fabric-banner {
  position: absolute;
  left: 50%;
  top: -70vh;
  z-index: 7;
  width: min(72vw, 980px);
  height: min(42vw, 480px);
  transform: translateX(-50%);
  transform-origin: 50% 0;
  pointer-events: none;
}

.fabric-banner.drop-in {
  animation:
    fabricFall 2050ms cubic-bezier(0.18, 0.92, 0.18, 1.02) forwards,
    fabricHang 4.8s ease-in-out 2050ms infinite;
}

.rope {
  position: absolute;
  top: -32vh;
  width: 18px;
  height: 45vh;
  border-radius: 999px;
  background:
    repeating-linear-gradient(45deg, #d89161 0 5px, #ffd1aa 5px 10px, #b86d46 10px 15px);
  box-shadow: inset 3px 0 4px rgba(255, 255, 255, 0.55), 0 5px 12px rgba(152, 76, 59, 0.24);
}

.rope-left {
  left: 9%;
}

.rope-right {
  right: 9%;
}

.banner-cloth {
  position: absolute;
  left: 0;
  right: 0;
  top: 16%;
  height: 74%;
  display: grid;
  align-content: center;
  justify-items: center;
  padding: 42px 60px 74px;
  background:
    radial-gradient(circle at 24% 22%, rgba(255, 255, 255, 0.82) 0 7%, transparent 8%),
    radial-gradient(circle at 76% 24%, rgba(255, 229, 165, 0.62) 0 5%, transparent 7%),
    linear-gradient(180deg, #fff5e8 0%, #ffe6d3 100%);
  clip-path: polygon(0 0, 100% 0, 95% 72%, 50% 100%, 5% 72%);
  border: 8px solid #f5a2af;
  filter: drop-shadow(0 26px 28px rgba(210, 82, 117, 0.28));
}

.banner-cloth::before {
  content: "";
  position: absolute;
  inset: 18px 22px 46px;
  clip-path: inherit;
  border: 3px dashed rgba(239, 117, 138, 0.58);
}

.banner-cloth::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.46), transparent 18% 82%, rgba(211, 107, 95, 0.12)),
    repeating-linear-gradient(100deg, rgba(222, 136, 108, 0.08) 0 2px, transparent 2px 8px);
  mix-blend-mode: multiply;
  opacity: 0.78;
}

.banner-cloth h1 {
  position: relative;
  z-index: 1;
  margin: 0;
  color: #ff7ca4;
  font-size: clamp(64px, 9.3vw, 148px);
  line-height: 1;
  font-weight: 900;
  letter-spacing: 0.05em;
  -webkit-text-stroke: 5px rgba(255, 255, 255, 0.9);
  text-shadow:
    0 8px 0 #e9517f,
    0 16px 26px rgba(206, 69, 111, 0.33),
    0 0 18px rgba(255, 255, 255, 0.82);
}

.banner-cloth p {
  position: relative;
  z-index: 1;
  margin: 26px 0 0;
  padding: 12px 34px;
  border: 3px dashed #f289a2;
  background: rgba(255, 247, 250, 0.7);
  color: #e75d87;
  font-size: clamp(22px, 2.5vw, 42px);
  font-weight: 900;
  letter-spacing: 0.14em;
}

.garland {
  position: absolute;
  top: 22px;
  left: 18%;
  right: 18%;
  z-index: 2;
  height: 44px;
  border-top: 3px solid rgba(245, 144, 111, 0.76);
  border-radius: 0 0 50% 50%;
}

.garland span {
  position: absolute;
  top: 13px;
  width: 22px;
  height: 22px;
  transform: rotate(45deg);
  border-radius: 55% 45% 55% 45%;
  background: #ff8caf;
  box-shadow: 0 6px 10px rgba(221, 89, 129, 0.2);
}

.garland span:nth-child(1) { left: 7%; }
.garland span:nth-child(2) { left: 28%; }
.garland span:nth-child(3) { left: 48%; }
.garland span:nth-child(4) { left: 68%; }
.garland span:nth-child(5) { left: 88%; }

.cloth-heart {
  position: absolute;
  bottom: 25px;
  left: 50%;
  z-index: 1;
  transform: translateX(-50%);
  color: #ff8caf;
  font-size: 54px;
  font-weight: 900;
  text-shadow: 0 3px 10px rgba(211, 83, 121, 0.22);
}

.bow {
  position: absolute;
  top: 9%;
  z-index: 4;
  width: 134px;
  height: 86px;
  transform: translateX(-50%);
}

.bow-left {
  left: 9.5%;
}

.bow-right {
  right: 9.5%;
  transform: translateX(50%) scaleX(-1);
}

.bow::before,
.bow::after {
  content: "";
  position: absolute;
  top: 12px;
  width: 64px;
  height: 54px;
  border-radius: 70% 30% 70% 35%;
  background:
    radial-gradient(circle at 34% 28%, rgba(255, 255, 255, 0.72), transparent 20%),
    linear-gradient(135deg, #ffd6df, #ff8fb0 62%, #df5c84);
  box-shadow: inset 0 -8px 18px rgba(196, 65, 101, 0.16), 0 10px 18px rgba(208, 73, 112, 0.24);
}

.bow::before {
  left: 8px;
  transform: rotate(16deg);
}

.bow::after {
  right: 8px;
  transform: rotate(-16deg) scaleX(-1);
}

.help-panel,
.photo-panel {
  position: absolute;
  right: 28px;
  top: 104px;
  z-index: 10;
  width: min(420px, calc(100vw - 32px));
  max-height: calc(100vh - 124px);
  overflow: auto;
  padding: 24px 24px 22px;
  border: 2px solid rgba(255, 255, 255, 0.78);
  border-radius: 18px;
  background: rgba(255, 250, 252, 0.94);
  box-shadow: 0 22px 50px rgba(213, 74, 119, 0.28);
  color: #c94774;
  transform: translateY(-10px);
  opacity: 0;
  transition: opacity 220ms ease, transform 220ms ease;
}

.help-panel.open,
.photo-panel.open {
  opacity: 1;
  transform: translateY(0);
}

.help-panel h2,
.photo-panel h2 {
  margin: 0 0 12px;
  font-size: 24px;
}

.help-panel li {
  margin: 10px 0;
  line-height: 1.6;
}

.help-panel code {
  padding: 2px 6px;
  border-radius: 6px;
  background: #ffe7ef;
  color: #b83f69;
}

.panel-note,
.panel-warning {
  margin: 0 0 16px;
  line-height: 1.6;
  font-size: 14px;
}

.panel-warning {
  margin: 14px 0 0;
  color: #a94d70;
}

.upload-box {
  display: grid;
  gap: 6px;
  place-items: center;
  min-height: 104px;
  margin: 12px 0 16px;
  padding: 18px;
  border: 2px dashed rgba(239, 117, 156, 0.68);
  border-radius: 16px;
  background: rgba(255, 231, 239, 0.72);
  color: #d94f80;
  cursor: pointer;
  text-align: center;
}

.upload-box span {
  font-size: 22px;
  font-weight: 900;
}

.upload-box small {
  font-size: 12px;
  color: #b75b7a;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.photo-preview-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin: 12px 0;
}

.preview-item {
  margin: 0;
  padding: 6px 6px 18px;
  border-radius: 5px;
  background: #fff;
  box-shadow: 0 8px 18px rgba(195, 84, 119, 0.18);
}

.preview-item img {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 4px;
  background: #ffdfe9;
}

.preview-item figcaption {
  margin-top: 5px;
  overflow: hidden;
  color: #e66f99;
  font-size: 10px;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
  text-align: center;
}

.panel-actions {
  display: flex;
  gap: 10px;
}

.panel-button {
  flex: 1;
  border: 0;
  border-radius: 999px;
  padding: 12px 14px;
  color: #d94f80;
  background: #ffe2eb;
  font-size: 14px;
  font-weight: 900;
  cursor: pointer;
}

.panel-button.primary {
  color: #fff;
  background: #f184aa;
  box-shadow: 0 8px 18px rgba(226, 89, 132, 0.24);
}

.panel-button:disabled {
  cursor: wait;
  opacity: 0.72;
}

.close-help {
  position: absolute;
  top: 10px;
  right: 12px;
  width: 32px;
  height: 32px;
  border: 0;
  border-radius: 50%;
  background: #ffe1ea;
  color: #e15f8c;
  font-size: 24px;
  cursor: pointer;
}

@keyframes buttonFloat {
  0%,
  100% {
    margin-top: 0;
  }
  50% {
    margin-top: -8px;
  }
}

@keyframes fadeAway {
  to {
    opacity: 0;
    transform: scale(1.04);
  }
}

@keyframes twinkle {
  0%,
  100% {
    transform: scale(0.86) rotate(0deg);
    opacity: 0.52;
  }
  50% {
    transform: scale(1.18) rotate(10deg);
    opacity: 1;
  }
}

@keyframes photoDrop {
  0% {
    top: -32vh;
    transform: translate3d(-50%, -50vh, 0) rotate(calc(var(--rotate) - 26deg)) scale(var(--scale));
    opacity: 0;
  }
  68% {
    top: var(--y);
    transform: translate3d(-50%, 4vh, 0) rotate(calc(var(--rotate) + 4deg)) scale(var(--scale));
    opacity: 1;
  }
  84% {
    top: var(--y);
    transform: translate3d(-50%, -2vh, 0) rotate(calc(var(--rotate) - 2deg)) scale(var(--scale));
  }
  100% {
    top: var(--y);
    transform: translate3d(-50%, 0, 0) rotate(var(--rotate)) scale(var(--scale));
    opacity: 1;
  }
}

@keyframes photoSway {
  0%,
  100% {
    margin-top: 0;
  }
  50% {
    margin-top: -10px;
  }
}

@keyframes fabricFall {
  0% {
    top: -70vh;
    transform: translateX(-50%) rotate(-3deg) scaleY(1.02);
  }
  58% {
    top: 14vh;
    transform: translateX(-50%) rotate(2deg) scaleY(1.06);
  }
  72% {
    top: 7vh;
    transform: translateX(-50%) rotate(-1.3deg) scaleY(0.96);
  }
  84% {
    top: 10.5vh;
    transform: translateX(-50%) rotate(0.8deg) scaleY(1.02);
  }
  100% {
    top: 9vh;
    transform: translateX(-50%) rotate(0deg) scaleY(1);
  }
}

@keyframes fabricHang {
  0%,
  100% {
    transform: translateX(-50%) rotate(0deg);
  }
  25% {
    transform: translateX(-50%) rotate(0.55deg);
  }
  50% {
    transform: translateX(-50%) rotate(0deg) translateY(4px);
  }
  75% {
    transform: translateX(-50%) rotate(-0.5deg);
  }
}

@media (max-width: 720px) {
  .verify-button {
    width: min(78vw, 420px);
    min-width: 0;
    padding: 24px 28px;
    font-size: 34px;
    border-width: 4px;
  }

  .topbar {
    height: 70px;
    padding: 0 18px;
  }

  .top-actions {
    gap: 10px;
  }

  .icon-button {
    width: 34px;
    height: 34px;
    font-size: 28px;
  }

  .polaroid-card {
    width: clamp(96px, 28vw, 130px);
    padding: 8px 8px 24px;
  }

  .polaroid-card figcaption {
    font-size: 10px;
  }

  .fabric-banner {
    width: 94vw;
    height: 58vw;
  }

  .banner-cloth {
    padding: 30px 24px 52px;
    border-width: 5px;
  }

  .banner-cloth h1 {
    font-size: clamp(44px, 16vw, 72px);
    -webkit-text-stroke-width: 3px;
    text-shadow: 0 5px 0 #e9517f, 0 10px 18px rgba(206, 69, 111, 0.28);
  }

  .banner-cloth p {
    margin-top: 14px;
    padding: 8px 14px;
    font-size: clamp(16px, 5vw, 24px);
    letter-spacing: 0.06em;
  }

  .rope {
    width: 12px;
  }

  .bow {
    width: 88px;
    height: 62px;
  }

  .bow::before,
  .bow::after {
    width: 43px;
    height: 36px;
  }
}

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