/* ============================================================
 *  language.css — Welcome gate (first-visit language picker)
 *  + persistent corner language-toggle button
 * ============================================================ */

/* ====================================================== */
/* ==============    WELCOME GATE (full)    ============= */
/* ====================================================== */

#welcome-gate {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: none;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 50%, #1b2a63 0%, #0a1230 55%, #03061a 100%);
  font-family: 'Cinzel', 'Noto Serif JP', serif;
  color: #f2e9c1;
  opacity: 0;
  transition: opacity 0.35s ease;
}

#welcome-gate.is-shown {
  display: flex;
  opacity: 1;
}

#welcome-gate.is-hiding {
  opacity: 0;
  pointer-events: none;
}

.welcome-gate-bg {
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      45deg,
      rgba(212, 175, 55, 0.04) 0 2px,
      transparent 2px 10px
    ),
    radial-gradient(circle at 30% 30%, rgba(90, 130, 230, 0.18), transparent 55%),
    radial-gradient(circle at 70% 70%, rgba(212, 175, 55, 0.12), transparent 55%);
  pointer-events: none;
}

.welcome-gate-aura {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 140vmin;
  height: 140vmin;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(212, 175, 55, 0.28) 0%, transparent 60%);
  filter: blur(20px);
  animation: welcome-pulse 5s ease-in-out infinite;
  pointer-events: none;
}

@keyframes welcome-pulse {
  0%, 100% { opacity: 0.55; transform: translate(-50%, -50%) scale(1); }
  50%      { opacity: 0.85; transform: translate(-50%, -50%) scale(1.06); }
}

.welcome-gate-shell {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 54px 68px;
  max-width: min(92vw, 720px);
  background: rgba(6, 12, 36, 0.72);
  border: 1px solid rgba(212, 175, 55, 0.55);
  box-shadow:
    0 0 0 1px rgba(212, 175, 55, 0.15) inset,
    0 20px 80px rgba(0, 0, 0, 0.6),
    0 0 60px rgba(212, 175, 55, 0.18);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.welcome-gate-kicker {
  font-size: 22px;
  color: #d4af37;
  letter-spacing: 0.4em;
  margin-bottom: 4px;
}

.welcome-gate-heading-en {
  font-family: 'Cinzel', serif;
  font-weight: 700;
  font-size: clamp(28px, 4vw, 42px);
  letter-spacing: 0.25em;
  color: #f2e9c1;
  margin: 0;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.7);
}

.welcome-gate-heading-ja {
  font-family: 'Noto Serif JP', serif;
  font-weight: 600;
  font-size: clamp(16px, 2vw, 22px);
  letter-spacing: 0.12em;
  color: rgba(242, 233, 193, 0.82);
  margin: 0 0 22px 0;
}

.welcome-gate-buttons {
  display: flex;
  gap: 26px;
  flex-wrap: wrap;
  justify-content: center;
}

.welcome-gate-btn {
  position: relative;
  width: 200px;
  min-height: 120px;
  padding: 22px 14px;
  background: rgba(13, 22, 48, 0.72);
  border: 2px solid #d4af37;
  color: #f2e9c1;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition:
    transform 0.2s ease,
    background 0.2s ease,
    border-color 0.2s ease,
    box-shadow 0.2s ease,
    color 0.2s ease;
}

.welcome-gate-btn:hover,
.welcome-gate-btn:focus-visible {
  transform: scale(1.04);
  background: rgba(24, 40, 86, 0.9);
  border-color: #ffd75c;
  color: #ffd75c;
  box-shadow:
    0 0 0 1px rgba(255, 215, 92, 0.5) inset,
    0 0 32px rgba(212, 175, 55, 0.55);
  outline: none;
}

.welcome-gate-btn:active {
  transform: scale(0.98);
}

.welcome-gate-btn-label {
  font-weight: 700;
  font-size: 26px;
  letter-spacing: 0.18em;
}

.welcome-gate-btn-en .welcome-gate-btn-label {
  font-family: 'Cinzel', serif;
}

.welcome-gate-btn-ja .welcome-gate-btn-label {
  font-family: 'Noto Serif JP', serif;
  font-weight: 600;
}

.welcome-gate-btn-sub {
  font-family: 'Share Tech Mono', 'Courier New', monospace;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: rgba(242, 233, 193, 0.62);
}

@media (max-width: 640px) {
  .welcome-gate-shell {
    padding: 32px 22px 28px;
    gap: 10px;
    max-width: min(86vw, 420px);
    width: 100%;
  }
  .welcome-gate-kicker {
    font-size: 18px;
    margin-bottom: 2px;
  }
  .welcome-gate-heading-en {
    font-size: clamp(22px, 6vw, 30px);
    letter-spacing: 0.22em;
    text-align: center;
    white-space: nowrap;
  }
  .welcome-gate-heading-ja {
    font-size: clamp(13px, 3.4vw, 16px);
    margin: 2px 0 16px 0;
    text-align: center;
  }
  .welcome-gate-buttons {
    flex-direction: column;
    gap: 14px;
    width: 100%;
  }
  .welcome-gate-btn {
    width: 100%;
    min-height: 78px;
    padding: 16px 14px;
    gap: 4px;
  }
  .welcome-gate-btn-label {
    font-size: 22px;
    letter-spacing: 0.16em;
  }
  .welcome-gate-btn-sub {
    font-size: 10px;
    letter-spacing: 0.22em;
  }
}

@media (max-width: 380px) {
  .welcome-gate-shell {
    padding: 26px 16px 22px;
    max-width: 92vw;
  }
  .welcome-gate-heading-en {
    font-size: clamp(20px, 5.5vw, 26px);
    letter-spacing: 0.18em;
  }
}

/* ====================================================== */
/* ============   LANGUAGE TOGGLE (corner)   ============ */
/* ====================================================== */

#language-toggle {
  position: fixed;
  top: 20px;
  right: 76px;   /* 20px edge + 44px mute button + 12px gap */
  height: 44px;
  padding: 0 14px;
  z-index: 200;
  display: flex;
  align-items: center;
  gap: 8px;
  border-radius: 22px;
  background: rgba(13, 22, 48, 0.75);
  border: 1px solid #d4af37;
  color: #d4af37;
  cursor: pointer;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  font-family: 'Cinzel', 'Noto Serif JP', serif;
  font-size: 13px;
  letter-spacing: 0.12em;
  transition:
    transform 0.2s ease,
    border-color 0.2s ease,
    background 0.2s ease;
}

#language-toggle:hover {
  transform: scale(1.04);
  border-color: #ffd75c;
  background: rgba(13, 22, 48, 0.9);
}

#language-toggle:focus-visible {
  outline: 2px solid #ffd75c;
  outline-offset: 3px;
}

#language-toggle:active {
  transform: scale(0.97);
}

.lang-toggle-en,
.lang-toggle-ja {
  opacity: 0.55;
  transition: opacity 0.18s ease, color 0.18s ease, text-shadow 0.18s ease;
  padding: 4px 2px;
}

.lang-toggle-ja {
  font-family: 'Noto Serif JP', serif;
  font-size: 14px;
}

.lang-toggle-en.is-active,
.lang-toggle-ja.is-active {
  opacity: 1;
  color: #ffd75c;
  text-shadow: 0 0 10px rgba(255, 215, 92, 0.55);
}

.lang-toggle-sep {
  opacity: 0.45;
  color: #d4af37;
}

/* Debounced state (during scene transitions) */
#language-toggle.is-disabled {
  pointer-events: none;
  opacity: 0.45;
}

body.is-ending #language-toggle {
  opacity: 0;
  pointer-events: none;
}

@media (max-width: 640px) {
  #language-toggle {
    top: calc(env(safe-area-inset-top, 0px) + 10px);
    right: 50px;  /* 10px edge + 36px mute + 4px gap */
    height: 36px;
    padding: 0 9px;
    gap: 6px;
    border-radius: 18px;
    font-size: 11px;
  }
  .lang-toggle-ja {
    font-size: 12px;
  }
}