/* ── Variables ── */
:root {
  --sky-blue: #c5d5f7;
  --dream-white: #f6f6f6;
  --gray-purple: #d1cde3;
  --petal-blue: #6c90c4;
  --orange-yellow: #f3b969;
  --ribbon-blue: #5a9bc6;
  --font: 'Noto Sans JP', sans-serif;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

body {
  font-family: var(--font);
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  background: transparent;
  color: #333;
}

/* ── Background ── */
.bg {
  position: fixed;
  top: -10vw;
  left: 0;
  right: -30vw;
  bottom: -10vw;
  background: linear-gradient(315deg, #f6f6f6 0%, #d1cde3 80%);
  z-index: 0;
  transform: translateX(0);
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}
.bg[data-shift="right"] { transform: translateX(20vw); }
.bg[data-shift="left"]  { transform: translateX(-20vw); }
.bg[data-shift="none"]  { transform: translateX(0); }

/* ── Nav ── */
.nav {
  position: fixed;
  top: 24px;
  right: 32px;
  z-index: 100;
  display: flex;
  gap: 24px;
}

.nav-btn {
  position: relative;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 700;
  color: #888;
  padding: 4px 0;
  letter-spacing: 0.03em;
  transition: color 0.2s ease;
}
.nav-btn::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--petal-blue);
  transition: width 0.2s ease;
}
.nav-btn:hover { color: var(--petal-blue); }
.nav-btn:hover::after,
.nav-btn.active::after { width: 100%; }
.nav-btn.active { color: var(--petal-blue); }

/* ── Panels container ── */
.panels {
  position: fixed;
  inset: 0;
  z-index: 10;
}

/* ── Panel base ── */
.panel {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
}
.panel.active {
  opacity: 1;
  pointer-events: auto;
}

/* exit directions */
.panel.exit-left  { transform: translateX(-30px); }
.panel.exit-right { transform: translateX(30px); }

/* enter directions */
.panel.enter-left  { transform: translateX(-30px); }
.panel.enter-right { transform: translateX(30px); }
.panel.enter-center { transform: translateX(0); }

/* ── Prologue ── */
.prologue-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  text-align: center;
}

.avatar {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 8px 32px rgba(108, 144, 196, 0.25);
}

.prologue-text {
  font-size: 1rem;
  line-height: 2;
  color: #555;
  max-width: 320px;
}
.prologue-sig {
  display: block;
  margin-top: 8px;
  font-size: 0.85rem;
  color: var(--petal-blue);
  font-weight: 700;
}

/* ── Social buttons ── */
.social-row {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  padding: 10px;
}

.social-btn {
  display: inline-flex;
  align-items: center;
  height: 60px;
  width: 60px;
  margin: 0 12px;
  overflow: hidden;
  background: #fff;
  border-radius: 50px;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  transition: box-shadow 1s ease, width 0.3s ease-out;
  flex-shrink: 0;
  position: relative;
}
.social-btn:hover {
  box-shadow: 0 10px 10px rgba(0,0,0,0.1);
  width: 160px;
}

.social-btn .icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 60px;
  width: 60px;
  min-width: 60px;
  border-radius: 50%;
  transition: background 0.3s ease-out;
}
.social-btn .icon i {
  font-size: 26px;
  color: #333;
  transition: color 0.3s ease-out;
}
.social-btn:hover .icon i { color: #fff; }

.social-btn span {
  font-size: 18px;
  font-weight: 600;
  opacity: 0;
  transform: translateX(-20px);
  transition: opacity 0.4s ease, transform 0.4s ease;
  white-space: nowrap;
  position: absolute;
  left: 60px;
  right: 0;
  text-align: center;
}
.social-btn:hover span {
  opacity: 1;
  transform: translateX(0);
}

/* MTF pink for all buttons */
.social-btn:hover .icon { background: #F5A9B8; }
.social-btn:hover span  { color: #F5A9B8; }

/* ── AsYouSeeMe ── */
#panel-asYouSeeMe {
  justify-content: flex-start;
  align-items: stretch;
}

.aysm-inner {
  display: flex;
  align-items: stretch;
  width: 100vw;
  height: 100vh;
}

.aysm-photo {
  width: 40vw;
  margin-left: 5vw;
  flex-shrink: 0;
  overflow: hidden;
  background: var(--gray-purple);
}
.aysm-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.aysm-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 60px 72px;
}

.aysm-name {
  font-size: 2.4rem;
  font-weight: 900;
  color: var(--petal-blue);
  margin-bottom: 16px;
}
.aysm-bio {
  font-size: 0.95rem;
  color: #777;
  line-height: 1.8;
  margin-bottom: 32px;
}
.aysm-list { display: flex; flex-direction: column; gap: 18px; }
.aysm-list li {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 1rem;
  color: #444;
}
.aysm-icon {
  font-size: 1.3rem;
  color: var(--petal-blue);
  flex-shrink: 0;
}
.aysm-value { font-weight: 700; }

/* ── BeginUs ── */
.beginUs-inner {
  width: 90%;
  max-width: 720px;
}

.site-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.site-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  background: white;
  border-radius: 14px;
  box-shadow: 0 2px 12px rgba(108, 144, 196, 0.12);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  opacity: 0;
  transform: translateY(20px);
}
.site-card.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.4s ease, transform 0.4s ease, box-shadow 0.2s ease;
}
.site-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(108, 144, 196, 0.22);
}
.site-card i {
  font-size: 1.6rem;
  color: var(--petal-blue);
  flex-shrink: 0;
}
.site-card-text {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.site-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: #333;
}
.site-desc {
  font-size: 0.75rem;
  color: #888;
  line-height: 1.4;
}

/* ── Responsive ── */
@media (max-width: 640px) {
  .nav { top: 16px; right: 16px; gap: 14px; }
  .nav-btn { font-size: 0.75rem; }

  #panel-asYouSeeMe { justify-content: center; }
  .aysm-inner { flex-direction: column; width: 100vw; height: auto; }
  .aysm-photo { width: 100vw; height: 40vh; }
  .aysm-info { padding: 32px 24px; }

  .site-grid { grid-template-columns: 1fr; }

  .social-btn:hover { width: 140px; }
}