/* =========================================================
   Tribe Foods Japan — Language Selector
   Philosophy: 余白で思想を翻訳する
========================================================= */

* { margin: 0; padding: 0; box-sizing: border-box; }

:root{
  --pure-black: #000000;
  --white: #FFFFFF;
  --off-white: #F5F5F0;
  --forest-green: #1A3D32;
  --muted-gold: #C9A86A;
  --soft-sage: #A3B8A2;

  --ease: ease-out;
  --fade-dur: 0.6s;
}

html, body{
  height: 100%;
  overflow: hidden;
}

body{
  font-family: 'Inter', sans-serif;
  background: var(--pure-black);
  color: var(--white);
  line-height: 1.7;
  position: relative;
}

.serif{
  font-family: 'Playfair Display', serif;
  letter-spacing: 0.01em;
}

/* === Background Overlay (静かな深緑のグラデーション) === */
.bg-overlay{
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at 50% 45%, rgba(26,61,50,0.12) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* === Main Container === */
.lang-selector{
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem 5%;
  animation: fadeIn 1s var(--ease);
}

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

.lang-container{
  max-width: 680px;
  width: 100%;
  text-align: center;
}

/* === Brand Mark === */
.brand-mark{
  margin-bottom: 4rem;
  animation: fadeInUp 1.2s var(--ease);
}

@keyframes fadeInUp{
  from{ opacity: 0; transform: translateY(15px); }
  to{ opacity: 1; transform: translateY(0); }
}

.brand-title{
  font-family: 'Playfair Display', serif;
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 600;
  letter-spacing: 0.22em;
  margin-bottom: 1.2rem;
  color: rgba(255,255,255,0.95);
}

.brand-tagline{
  font-size: clamp(1rem, 2.2vw, 1.3rem);
  line-height: 1.6;
  color: rgba(245,245,240,0.82);
  font-weight: 300;
}

/* === Divider === */
.divider{
  width: 64px;
  height: 2px;
  background: var(--muted-gold);
  margin: 3rem auto;
  opacity: 0;
  animation: fadeIn 0.8s var(--ease) 0.6s forwards;
}

/* === Language Prompt === */
.lang-prompt{
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  margin-bottom: 3rem;
  color: rgba(245,245,240,0.88);
  opacity: 0;
  animation: fadeIn 0.8s var(--ease) 0.9s forwards;
}

/* === Language Navigation === */
.lang-nav{
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  margin-bottom: 4rem;
  opacity: 0;
  animation: fadeIn 0.8s var(--ease) 1.2s forwards;
}

.lang-option{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 2rem;
  background: rgba(245,245,240,0.04);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 12px;
  color: var(--white);
  text-decoration: none;
  transition: all 0.45s var(--ease);
  position: relative;
  overflow: hidden;
}

.lang-option::before{
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--muted-gold);
  transform: scaleY(0);
  transition: transform 0.45s var(--ease);
  transform-origin: bottom;
}

.lang-option:hover::before,
.lang-option:focus::before{
  transform: scaleY(1);
}

.lang-option:hover,
.lang-option:focus{
  background: rgba(26,61,50,0.08);
  border-color: rgba(201,168,106,0.35);
  transform: translateX(4px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
  outline: none;
}

.lang-name{
  font-size: clamp(1.1rem, 2.2vw, 1.4rem);
  font-weight: 400;
  letter-spacing: 0.05em;
}

.lang-arrow{
  font-size: 1.5rem;
  color: var(--muted-gold);
  transition: transform 0.45s var(--ease);
}

.lang-option:hover .lang-arrow,
.lang-option:focus .lang-arrow{
  transform: translateX(6px);
}

/* === Footer Note === */
.lang-note{
  font-size: clamp(0.85rem, 1.5vw, 0.95rem);
  color: rgba(255,255,255,0.45);
  line-height: 1.6;
  opacity: 0;
  animation: fadeIn 0.8s var(--ease) 1.5s forwards;
}

/* === Responsive === */
@media (max-width: 768px){
  .lang-selector{
    padding: 2rem 8%;
  }

  .brand-mark{
    margin-bottom: 3rem;
  }

  .lang-option{
    padding: 1.3rem 1.5rem;
  }

  .lang-nav{
    gap: 1rem;
    margin-bottom: 3rem;
  }
}

/* === Reduced Motion === */
@media (prefers-reduced-motion: reduce){
  *{
    animation: none !important;
    transition: none !important;
  }

  .divider,
  .lang-prompt,
  .lang-nav,
  .lang-note{
    opacity: 1;
  }
}

/* === JavaScript有効時：即座に非表示（リダイレクト中） === */
body.js-enabled .lang-selector{
  opacity: 0;
  pointer-events: none;
}

body.js-enabled .lang-selector::after{
  content: 'Redirecting...';
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 1rem;
  color: rgba(245,245,240,0.6);
  letter-spacing: 0.15em;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse{
  0%, 100%{ opacity: 0.4; }
  50%{ opacity: 1; }
}