.openpack-v2-shell {
  position: relative;
  overflow: hidden;
  padding: 18px;
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(13,18,32,0.92), rgba(8,11,20,0.96));
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.06), 0 20px 60px rgba(3,6,15,0.34);
}

.openpack-v2-shell * {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

.openpack-v2-progress {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 16px;
}

.openpack-v2-progress-item {
  padding: 12px 10px;
  border-radius: 16px;
  text-align: center;
  font-weight: 700;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.76);
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.07);
  transition: transform 180ms ease, background 180ms ease, color 180ms ease, border-color 180ms ease;
}

.openpack-v2-progress-item.active {
  color: #ffffff;
  background: linear-gradient(135deg, rgba(255,94,58,0.36), rgba(84,160,255,0.32));
  border-color: rgba(255,255,255,0.18);
  transform: translateY(-1px);
}

.openpack-v2-progress-item.done {
  color: rgba(255,255,255,0.9);
  background: rgba(34,197,94,0.18);
  border-color: rgba(34,197,94,0.22);
}

.openpack-v2-stage {
  position: relative;
  min-height: 560px;
  border-radius: 26px;
  overflow: hidden;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.05);
}

.openpack-v2-step {
  display: none;
  min-height: 560px;
}

.openpack-v2-step.active {
  display: flex;
}

.openpack-v2-step-copy {
  position: absolute;
  top: 18px;
  left: 18px;
  right: 18px;
  z-index: 8;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.openpack-v2-step-copy h3,
.openpack-v2-step-copy p {
  margin: 0;
}

.openpack-v2-step-copy h3 {
  font-size: 1.1rem;
  font-weight: 800;
}

.openpack-v2-step-copy p {
  color: rgba(255,255,255,0.76);
  max-width: 540px;
}

.openpack-v2-step-meta {
  padding: 10px 14px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.86rem;
  color: #fff;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.08);
}

.openpack-v2-hint {
  position: absolute;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  z-index: 9;
  width: calc(100% - 36px);
  max-width: 560px;
  padding: 10px 14px;
  border-radius: 999px;
  text-align: center;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.88);
  background: rgba(5,8,14,0.48);
  border: 1px solid rgba(255,255,255,0.08);
  backdrop-filter: blur(8px);
}

/* Step 1 */
.openpack-v2-step1 {
  position: relative;
  align-items: stretch;
  justify-content: center;
  background: url('step1/assets/wall.gif') center no-repeat;
  background-size: cover;
  isolation: isolate;
}

.openpack-v2-step1::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0.22), rgba(0,0,0,0.46));
  z-index: 0;
}

.openpack-v2-ambient {
  position: absolute;
  width: 42vmax;
  height: 42vmax;
  border-radius: 50%;
  filter: blur(42px);
  opacity: 0.6;
  pointer-events: none;
}

.openpack-v2-ambient.one {
  background: rgba(255, 74, 30, 0.32);
  left: -10vmax;
  bottom: -10vmax;
}

.openpack-v2-ambient.two {
  background: rgba(20, 152, 255, 0.22);
  right: -10vmax;
  top: -10vmax;
}

.openpack-v2-step1-stage {
  position: relative;
  z-index: 1;
  width: 100%;
  display: grid;
  place-items: center;
  padding: 120px 12px 64px;
}

.openpack-v2-slider-viewport {
  width: 100%;
  height: min(100vh, 460px);
  overflow: hidden;
  position: relative;
  touch-action: pan-x;
  cursor: grab;
  mask-image: linear-gradient(to right, transparent 0%, black 9%, black 91%, transparent 100%);
  -webkit-mask-image: linear-gradient(to right, transparent 0%, black 9%, black 91%, transparent 100%);
}

.openpack-v2-slider-viewport.is-dragging {
  cursor: grabbing;
}

.openpack-v2-slider-track {
  position: absolute;
  inset: 50% auto auto 0;
  display: flex;
  align-items: center;
  gap: clamp(14px, 4vw, 28px);
  transform: translate3d(0, -50%, 0);
  will-change: transform;
  padding-inline: max(8vw, 32px);
}

.openpack-v2-pack {
  flex: 0 0 auto;
  width: clamp(150px, 39vw, 230px);
  height: calc(clamp(150px, 39vw, 230px) * 1.9);
  display: block;
  position: relative;
  border: 0;
  padding: 0;
  border-radius: clamp(20px, 5vw, 34px);
  overflow: hidden;
  user-select: none;
  background: transparent;
  transform-origin: center center;
  transition: transform 220ms ease, filter 220ms ease;
  filter: drop-shadow(0 14px 26px rgba(0, 0, 0, 0.42));
}

.openpack-v2-pack::after {
  content: '';
  position: absolute;
  inset: auto 10% 3% 10%;
  height: 9%;
  border-radius: 50%;
  filter: blur(10px);
  z-index: -1;
}

.openpack-v2-pack:hover,
.openpack-v2-pack:focus-visible {
  transform: translateY(-6px) scale(1.02);
  filter: drop-shadow(0 20px 34px rgba(255, 109, 45, 0.26));
}

.openpack-v2-pack:focus-visible {
  outline: 2px solid rgba(255,255,255,0.8);
  outline-offset: 4px;
}

.openpack-v2-pack img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  border-radius: inherit;
}

.openpack-v2-pack.is-selected {
  transform: translateY(-10px) scale(1.05);
  filter: drop-shadow(0 30px 40px rgba(255, 196, 84, 0.46));
}

.openpack-v2-pack.is-selected::before {
  content: '';
  position: absolute;
  inset: 8%;
  border-radius: inherit;
  border: 2px solid rgba(255,238,179,0.76);
  box-shadow: 0 0 24px rgba(255,209,102,0.45), inset 0 0 28px rgba(255,255,255,0.12);
}

.openpack-v2-step1-flash {
  position: absolute;
  inset: 0;
  z-index: 12;
  pointer-events: none;
  opacity: 0;
  background: radial-gradient(circle at center, rgba(255,255,255,0.98), rgba(255,244,215,0.55) 28%, rgba(255,255,255,0) 72%);
}

.openpack-v2-step1-flash.is-active {
  animation: openpackStep1Flash 660ms ease forwards;
}

@keyframes openpackStep1Flash {
  0% { opacity: 0; }
  18% { opacity: 1; }
  100% { opacity: 0; }
}

/* Step 2 */
.openpack-v2-step2 {
  position: relative;
  align-items: center;
  justify-content: center;
  background: url('step2/bg.webp') center no-repeat;
  background-size: cover;
}

.openpack-v2-step2::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(3,8,20,0.18), rgba(3,8,20,0.52));
}

.openpack-v2-step2-root {
  position: relative;
  z-index: 1;
  width: 100%;
  min-height: 560px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 20px 58px;
}

.openpack-v2-screen-fade {
  position: absolute;
  inset: 0;
  background: #fff;
  pointer-events: none;
  z-index: 20;
}

.openpack-v2-screen-fade--intro {
  opacity: 1;
}

.openpack-v2-screen-fade--intro.is-clearing {
  animation: openpackFadeOutWhite 1s ease forwards;
}

.openpack-v2-screen-fade.is-entering {
  animation: openpackFadeInWhite 1s ease forwards;
}

@keyframes openpackFadeOutWhite {
  from { opacity: 1; }
  to { opacity: 0; visibility: hidden; }
}

@keyframes openpackFadeInWhite {
  from { opacity: 0; }
  to { opacity: 1; }
}

.openpack-v2-step2-inner {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 26px;
}

.openpack-v2-step2-blink {
  position: absolute;
  top: 18px;
  left: 18px;
  right: 18px;
  z-index: 6;
  text-align: center;
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  animation: openpackBlink 1s linear infinite;
}

@keyframes openpackBlink {
  50% { opacity: 0; }
}

.openpack-v2-letter-image {
  width: min(92vw, 420px);
  aspect-ratio: 2 / 3;
  position: relative;
  cursor: pointer;
  touch-action: none;
  will-change: transform;
  outline: none;
}

.openpack-v2-letter-image:focus-visible {
  filter: drop-shadow(0 0 0.75rem rgba(255, 255, 255, 0.35));
}

.openpack-v2-letter-image.floating {
  animation: openpackFloatY 2.4s ease-in-out infinite;
}

.openpack-v2-letter-image[data-shake='slow'] {
  animation: openpackShakeSlow 0.6s ease-in-out infinite;
}

.openpack-v2-letter-image[data-shake='medium'] {
  animation: openpackShakeMedium 0.24s linear infinite;
}

.openpack-v2-letter-image[data-shake='fast'] {
  animation: openpackShakeFast 0.09s linear infinite;
}

.openpack-v2-letter-image.completed {
  pointer-events: none;
}

.openpack-v2-letter-photo {
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
  user-select: none;
  -webkit-user-drag: none;
  filter: drop-shadow(0 24px 38px rgba(0,0,0,0.42));
}

.openpack-v2-open-button {
  border: 0;
  min-width: min(90vw, 320px);
  min-height: 62px;
  border-radius: 999px;
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  box-shadow: 0 16px 34px rgba(3,8,20,0.26);
}

@keyframes openpackFloatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes openpackShakeSlow {
  0% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  50% { transform: translateX(4px); }
  75% { transform: translateX(-3px); }
  100% { transform: translateX(0); }
}

@keyframes openpackShakeMedium {
  0% { transform: translateX(0); }
  20% { transform: translateX(-8px); }
  40% { transform: translateX(8px); }
  60% { transform: translateX(-7px); }
  80% { transform: translateX(7px); }
  100% { transform: translateX(0); }
}

@keyframes openpackShakeFast {
  0% { transform: translateX(0); }
  16% { transform: translateX(-11px); }
  32% { transform: translateX(11px); }
  48% { transform: translateX(-10px); }
  64% { transform: translateX(10px); }
  80% { transform: translateX(-8px); }
  100% { transform: translateX(0); }
}

/* Step 3 */
.openpack-v2-step3 {
  position: relative;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at top, rgba(21,32,64,0.96), rgba(6,9,17,1) 68%);
}

.openpack-v2-step3-root {
  position: relative;
  z-index: 1;
  width: 100%;
  min-height: 560px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 110px 20px 34px;
  text-align: center;
}

.openpack-v2-step3-copy-block {
  max-width: 620px;
}

.openpack-v2-step3-copy-block h3,
.openpack-v2-step3-copy-block p {
  margin: 0;
}

.openpack-v2-step3-copy-block h3 {
  font-size: 1.3rem;
  font-weight: 900;
}

.openpack-v2-step3-copy-block p {
  margin-top: 8px;
  color: rgba(255,255,255,0.78);
}

.openpack-v2-three-d-wrapper {
  perspective: 900px;
  isolation: isolate;
  transform: translate3d(0.1px, 0.1px, 0.1px);
}

.openpack-v2-result-card {
  --openpack-color1: rgb(0, 231, 255);
  --openpack-color2: rgb(255, 0, 231);
  --openpack-front: url('step2/assets/letter-image.png');
  --openpack-grad-x: 50%;
  --openpack-grad-y: 50%;
  --openpack-spark-x: 50%;
  --openpack-spark-y: 50%;
  --openpack-spark-opacity: 0.75;
  width: min(71.5vw, 320px);
  height: min(100vw, 448px);
  position: relative;
  overflow: hidden;
  margin: 0;
  z-index: 10;
  touch-action: none;
  isolation: isolate;
  border-radius: 5% / 3.5%;
  box-shadow: -5px -5px 5px -5px var(--openpack-color1), 5px 5px 5px -5px var(--openpack-color2), -7px -7px 10px -5px transparent, 7px 7px 10px -5px transparent, 0 0 5px 0 rgba(255, 255, 255, 0), 0 55px 35px -20px rgba(0, 0, 0, 0.5);
  transition: transform 0.5s ease, box-shadow 0.2s ease;
  will-change: transform, filter;
  background-color: #040712;
  background-image: var(--openpack-front);
  background-size: cover;
  background-repeat: no-repeat;
  background-position: 50% 50%;
  transform-origin: center;
}

@media screen and (min-width: 600px) {
  .openpack-v2-result-card {
    width: clamp(12.9vw, 61vh, 18vw);
    height: clamp(18vw, 85vh, 25.2vw);
  }
}

.openpack-v2-result-card::before,
.openpack-v2-result-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background-repeat: no-repeat;
  transition: all 0.33s ease;
  mix-blend-mode: color-dodge;
}

.openpack-v2-result-card::before {
  background-position: var(--openpack-grad-x) var(--openpack-grad-y);
  background-size: 300% 300%;
  background-image: linear-gradient(115deg, transparent 0%, var(--openpack-color1) 25%, transparent 47%, transparent 53%, var(--openpack-color2) 75%, transparent 100%);
  opacity: 0.5;
  filter: brightness(0.5) contrast(1);
  z-index: 1;
}

.openpack-v2-result-card::after {
  opacity: var(--openpack-spark-opacity);
  background-image: url('https://assets.codepen.io/13471/sparkles.gif'), url('https://assets.codepen.io/13471/holo.png'), linear-gradient(125deg, #ff008450 15%, #fca40040 30%, #ffff0030 40%, #00ff8a20 60%, #00cfff40 70%, #cc4cfa50 85%);
  background-position: var(--openpack-spark-x) var(--openpack-spark-y);
  background-size: 160%;
  background-blend-mode: overlay;
  z-index: 2;
  filter: brightness(1) contrast(1);
}

.openpack-v2-result-card.is-active,
.openpack-v2-result-card:hover {
  box-shadow: -20px -20px 30px -25px var(--openpack-color1), 20px 20px 30px -25px var(--openpack-color2), -7px -7px 10px -5px var(--openpack-color1), 7px 7px 10px -5px var(--openpack-color2), 0 0 13px 4px rgba(255, 255, 255, 0.3), 0 55px 35px -20px rgba(0, 0, 0, 0.5);
}

.openpack-v2-result-card.animated {
  transition: none;
  animation: openpackHoloCard 12s ease 0s 1;
}

.openpack-v2-result-card.animated::before {
  transition: none;
  animation: openpackHoloGradient 12s ease 0s 1;
}

.openpack-v2-result-card.animated::after {
  transition: none;
  animation: openpackHoloSparkle 12s ease 0s 1;
}

@keyframes openpackHoloSparkle {
  0%, 100% { opacity: 0.75; background-position: 50% 50%; filter: brightness(1.2) contrast(1.25); }
  5%, 8% { opacity: 1; background-position: 40% 40%; filter: brightness(0.8) contrast(1.2); }
  13%, 16% { opacity: 0.5; background-position: 50% 50%; filter: brightness(1.2) contrast(0.8); }
  35%, 38% { opacity: 1; background-position: 60% 60%; filter: brightness(1) contrast(1); }
  55% { opacity: 0.33; background-position: 45% 45%; filter: brightness(1.2) contrast(1.25); }
}

@keyframes openpackHoloGradient {
  0%, 100% { opacity: 0.5; background-position: 50% 50%; filter: brightness(0.5) contrast(1); }
  5%, 9% { background-position: 100% 100%; opacity: 1; filter: brightness(0.75) contrast(1.25); }
  13%, 17% { background-position: 0% 0%; opacity: 0.88; }
  35%, 39% { background-position: 100% 100%; opacity: 1; filter: brightness(0.5) contrast(1); }
  55% { background-position: 0% 0%; opacity: 1; filter: brightness(0.75) contrast(1.25); }
}

@keyframes openpackHoloCard {
  0%, 100% { transform: rotateZ(0deg) rotateX(0deg) rotateY(0deg); }
  5%, 8% { transform: rotateZ(0deg) rotateX(6deg) rotateY(-20deg); }
  13%, 16% { transform: rotateZ(0deg) rotateX(-9deg) rotateY(32deg); }
  35%, 38% { transform: rotateZ(3deg) rotateX(12deg) rotateY(20deg); }
  55% { transform: rotateZ(-3deg) rotateX(-12deg) rotateY(-27deg); }
}

.openpack-v2-step3-note {
  max-width: 520px;
  color: rgba(255,255,255,0.78);
}

.openpack-v2-step3-note strong {
  color: #fff;
}

.openpack-v2-confirm-btn {
  width: min(100%, 320px);
  min-height: 62px;
  border-radius: 999px;
  font-size: 1rem;
  font-weight: 800;
}

.openpack-v2-collection-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 6px;
  padding: 10px 16px;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.08);
  color: #fff;
  font-weight: 700;
}

.openpack-v2-collection-pill img {
  width: 28px;
  height: 28px;
  object-fit: contain;
  filter: drop-shadow(0 6px 12px rgba(0,0,0,0.24));
}

@media (max-width: 768px) {
  .openpack-v2-shell { padding: 14px; }
  .openpack-v2-progress { gap: 8px; }
  .openpack-v2-progress-item { font-size: 0.78rem; padding: 10px 8px; }
  .openpack-v2-step-copy { top: 14px; left: 14px; right: 14px; }
  .openpack-v2-step-copy h3 { font-size: 1rem; }
  .openpack-v2-step-meta { width: 100%; text-align: center; }
  .openpack-v2-stage,
  .openpack-v2-step,
  .openpack-v2-step2-root,
  .openpack-v2-step3-root { min-height: 500px; }
  .openpack-v2-slider-viewport { height: 400px; }
}

@media (prefers-reduced-motion: reduce) {
  .openpack-v2-pack,
  .openpack-v2-letter-image,
  .openpack-v2-result-card,
  .openpack-v2-result-card::before,
  .openpack-v2-result-card::after,
  .openpack-v2-step2-blink {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}