/* ============================================
   Entry Page & Transition Styles
   CREATIVE GOLD
   白背景バージョン
   ============================================ */

/* ── Entry Page ── */
.entry-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  min-height: 100dvh;
  background: #FFF;
  color: #1A1A1A;
  padding: var(--side-padding);
  position: relative;
  overflow: hidden;
}

/* Subtle background texture */
.entry-page::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(0,0,0,0.02) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 50% 120%, rgba(0,0,0,0.01) 0%, transparent 50%);
  pointer-events: none;
}

.entry-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 720px;
  width: 100%;
}

/* Brand mark */
.entry-brand {
  display: inline-block;
  max-width: 150px;
  height: auto;
  margin-bottom: var(--space-md);
  opacity: 0;
  animation: fadeInUp 0.8s var(--ease-out-expo) 0.2s forwards;
}

/* Question */
.entry-question {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-snug);
  letter-spacing: var(--ls-wide);
  color: #1A1A1A;
  margin-bottom: var(--space-md);
  opacity: 0;
  animation: fadeInUp 0.8s var(--ease-out-expo) 0.5s forwards;
}

.entry-question em {
  font-style: normal;
  display: inline-block;
  position: relative;
}

.entry-question em::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: #CCC;
}

/* Subtitle */
.entry-subtitle {
  font-family: var(--font-sans);
  font-size: var(--fs-sm);
  font-weight: var(--fw-light);
  color: #999;
  margin-bottom: var(--space-lg);
  opacity: 0;
  animation: fadeInUp 0.8s var(--ease-out-expo) 0.7s forwards;
}

/* Choices */
.entry-choices {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  opacity: 0;
  animation: fadeInUp 0.8s var(--ease-out-expo) 0.9s forwards;
}

.entry-choice {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: clamp(0.75rem, 1vw, 1.25rem) clamp(1.5rem, 2vw, 2rem);
  background: #FAFAFA;
  border: 1px solid #E8E8E8;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-align: left;
  transition: all var(--duration-normal) var(--ease-out-expo);
  overflow: hidden;
}

.entry-choice::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity var(--duration-slow) var(--ease-out-expo);
}

.entry-choice[data-route="a"]::before {
  background: linear-gradient(135deg, rgba(var(--blue-primary-rgb), 0.08) 0%, transparent 60%);
}
.entry-choice[data-route="b"]::before {
  background: linear-gradient(135deg, rgba(var(--green-primary-rgb), 0.08) 0%, transparent 60%);
}
.entry-choice[data-route="c"]::before {
  background: linear-gradient(135deg, rgba(var(--red-primary-rgb), 0.1) 0%, transparent 60%);
}

.entry-choice:hover::before {
  opacity: 1;
}

.entry-choice:hover {
  border-color: #CCC;
  transform: translateY(-2px);
}

.entry-choice[data-route="a"]:hover {
  border-color: var(--blue-primary);
  box-shadow: 0 8px 32px rgba(var(--blue-primary-rgb), 0.15);
}
.entry-choice[data-route="b"]:hover {
  border-color: var(--green-primary);
  box-shadow: 0 8px 32px rgba(var(--green-primary-rgb), 0.15);
}
.entry-choice[data-route="c"]:hover {
  border-color: var(--red-primary);
  box-shadow: 0 8px 32px rgba(var(--red-primary-rgb), 0.15);
}

.choice-number {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: var(--fw-bold);
  line-height: 1;
  color: #E8E8E8;
  transition: color var(--duration-normal) var(--ease-out-expo);
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}

.entry-choice[data-route="a"]:hover .choice-number { color: rgba(var(--blue-primary-rgb), 0.2); }
.entry-choice[data-route="b"]:hover .choice-number { color: rgba(var(--green-primary-rgb), 0.2); }
.entry-choice[data-route="c"]:hover .choice-number { color: rgba(var(--red-primary-rgb), 0.2); }

.choice-text {
  position: relative;
  z-index: 1;
}

.choice-label {
  font-family: var(--font-serif);
  font-size: var(--fs-lg);
  font-weight: var(--fw-medium);
  color: #1A1A1A;
  margin-bottom: 0.2em;
  transition: color var(--duration-normal) var(--ease-out-expo);
}

.entry-choice[data-route="a"]:hover .choice-label { color: var(--blue-primary); }
.entry-choice[data-route="b"]:hover .choice-label { color: var(--green-primary); }
.entry-choice[data-route="c"]:hover .choice-label { color: var(--red-primary); }

.choice-desc {
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  font-weight: var(--fw-light);
  color: #999;
  line-height: var(--lh-normal);
}

/* Arrow icon */
.choice-arrow {
  margin-left: auto;
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  position: relative;
  z-index: 1;
  opacity: 0;
  transform: translateX(-8px);
  transition: all var(--duration-normal) var(--ease-out-expo);
}

.choice-arrow svg {
  width: 100%;
  height: 100%;
  stroke: #AAA;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.entry-choice:hover .choice-arrow {
  opacity: 1;
  transform: translateX(0);
}

.entry-choice[data-route="a"]:hover .choice-arrow svg { stroke: var(--blue-primary); }
.entry-choice[data-route="b"]:hover .choice-arrow svg { stroke: var(--green-primary); }
.entry-choice[data-route="c"]:hover .choice-arrow svg { stroke: var(--red-primary); }

/* ── Transition Page ── */
.transition-page {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #FFF;
  z-index: 9999;
  overflow: hidden;
}

.transition-bg {
  position: absolute;
  inset: 0;
  transform: scale(0);
  border-radius: 50%;
  transition: none;
}

.transition-bg.expand {
  animation: bgExpand 1.2s var(--ease-out-expo) forwards;
}

.transition-text {
  position: relative;
  z-index: 1;
  font-family: var(--font-serif);
  font-size: var(--fs-2xl);
  font-weight: var(--fw-semibold);
  color: #FFF;
  text-align: center;
  letter-spacing: var(--ls-wide);
  line-height: var(--lh-snug);
  opacity: 0;
  transform: translateY(20px);
  padding: 0 var(--side-padding);
}

.transition-text.show {
  animation: fadeInUp 0.8s var(--ease-out-expo) forwards;
}

.transition-subtext {
  position: relative;
  z-index: 1;
  font-family: var(--font-sans);
  font-size: var(--fs-sm);
  font-weight: var(--fw-light);
  color: rgba(255, 255, 255, 0.7);
  text-align: center;
  letter-spacing: var(--ls-wider);
  margin-top: var(--space-md);
  opacity: 0;
}

.transition-subtext.show {
  animation: fadeInUp 0.6s var(--ease-out-expo) forwards;
}

/* Particles */
.transition-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  opacity: 0;
}

/* ── Animations ── */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes bgExpand {
  0% {
    transform: scale(0);
    border-radius: 50%;
  }
  100% {
    transform: scale(4);
    border-radius: 0;
  }
}

@keyframes particleFloat {
  0% {
    opacity: 0;
    transform: translateY(0) scale(0);
  }
  20% {
    opacity: 1;
    transform: translateY(-20px) scale(1);
  }
  100% {
    opacity: 0;
    transform: translateY(-100px) scale(0.5);
  }
}

/* ── Responsive ── */
@media (max-width: 640px) {
  .entry-choice {
    padding: 1rem 1.2rem;
    gap: 0.8rem;
  }

  .choice-number {
    font-size: var(--fs-xl);
  }

  .choice-arrow {
    display: none;
  }
}

/* Responsive Br Helpers */
.sp-br {
  display: none;
}
.pc-br {
  display: block;
}

@media (max-width: 640px) {
  .sp-br {
    display: block !important;
  }
  .pc-br {
    display: none !important;
  }

  /* Transition Page Mobile Adjustments */
  .transition-text {
    font-size: 1.5rem !important; /* スマホではサイズを少し抑える */
  }
  .transition-subtext {
    font-size: 0.75rem !important;
  }
}