/* ============================================================
   TEN-EN LP 共通：ベース変数＋オープニングシーケンス
   クリックスタート → 動画オープニング → メインサイト
   （index.html / b/index.html の2パターンで共用）
   ============================================================ */

:root {
  --bg: #0a0b10;
  --bg-2: #0e1015;
  --bg-panel: #0f1118;
  --gold: #dd9300;
  --gold-light: #ffd37e;
  --gold-text: #e2cba6;
  --gold-grad-start: #c09645;
  --gold-grad-mid: #ffc977;
  --gold-grad-end: #c09645;
  --panel-border: #7a7369;
  --dark-border: #31323c;
  --text: #d8d2c6;
  --text-mute: #8c8578;
  --font-display: "El Messiri", serif;
  --font-body: "Noto Sans JP", sans-serif;
  --font-serif: "Noto Serif JP", serif;
  --font-mono: "Quantico", monospace;
  --app-width: 100vw;
  --app-height: 100vh;
  --app-offset-top: 0px;
  --app-offset-left: 0px;
  --app-safe-top: env(safe-area-inset-top, 0px);
  --app-safe-right: env(safe-area-inset-right, 0px);
  --app-safe-bottom: env(safe-area-inset-bottom, 0px);
  --app-safe-left: env(safe-area-inset-left, 0px);
}
@supports (height: 100dvh) {
  :root { --app-height: 100dvh; }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; min-height: 100%; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-feature-settings: "palt";
  -webkit-font-smoothing: antialiased;
  letter-spacing: 0.02em;
  overflow-x: hidden;
}
body.opening-locked { overflow: hidden; height: var(--app-height); }

a { color: inherit; text-decoration: none; }

/* 白フェード遷移用 */
#opening-transition {
  position: fixed;
  top: var(--app-offset-top);
  left: var(--app-offset-left);
  width: var(--app-width);
  height: var(--app-height);
  background: #fff;
  z-index: 900;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.6s ease;
}
#opening-transition.active { opacity: 1; pointer-events: all; }

/* クリックスタート画面 */
#click-start {
  position: fixed;
  top: var(--app-offset-top);
  left: var(--app-offset-left);
  width: var(--app-width);
  height: var(--app-height);
  background:
    radial-gradient(
      ellipse 80% 60% at 50% 50%,
      #2a2c34 0%,
      #1c1e24 55%,
      #131419 100%
    );
  z-index: 1000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding:
    calc(24px + var(--app-safe-top))
    calc(24px + var(--app-safe-right))
    calc(24px + var(--app-safe-bottom))
    calc(24px + var(--app-safe-left));
  overflow-y: auto;
  text-align: center;
  cursor: pointer;
  touch-action: manipulation;
  transition: opacity 0.6s ease;
}
#click-start.hide { opacity: 0; pointer-events: none; }
#click-start img {
  max-width: min(240px, 60vw);
  height: auto;
  margin-bottom: 44px;
  filter: drop-shadow(0 0 28px rgba(221, 147, 0, 0.45));
}
#click-start .cs-btn {
  border: 1px solid rgba(221, 147, 0, 0.55);
  color: var(--gold-text);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.5em;
  text-indent: 0.5em;
  padding: 16px 48px;
  background: rgba(10, 11, 16, 0.6);
  animation: cs-pulse 2s ease-in-out infinite;
  flex: 0 0 auto;
}
@keyframes cs-pulse {
  0%, 100% { opacity: 0.7; box-shadow: 0 0 0 0 rgba(221, 147, 0, 0.15); }
  50% { opacity: 1; box-shadow: 0 0 24px 4px rgba(221, 147, 0, 0.18); }
}

/* 回転促し画面（スマホ縦持ち検出時） */
#rotate-prompt {
  position: fixed;
  top: var(--app-offset-top);
  left: var(--app-offset-left);
  width: var(--app-width);
  height: var(--app-height);
  background:
    radial-gradient(
      ellipse 80% 60% at 50% 50%,
      #1c1e24 0%,
      #131419 60%,
      #0a0b10 100%
    );
  z-index: 1050;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding:
    calc(24px + var(--app-safe-top))
    calc(24px + var(--app-safe-right))
    calc(24px + var(--app-safe-bottom))
    calc(24px + var(--app-safe-left));
  overflow-y: auto;
  text-align: center;
}
#rotate-prompt.show { display: flex; }

.rotate-prompt-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: auto 0;
}
.rotate-svg {
  width: min(220px, 58vw);
  height: auto;
  margin-bottom: 28px;
  color: var(--gold-light);
  filter: drop-shadow(0 0 16px rgba(221, 147, 0, 0.25));
}

.rotate-phone-group {
  transform-origin: 50% 50%;
  transform-box: fill-box;
  animation: rotate-phone-anim 2.6s cubic-bezier(0.65, 0, 0.35, 1) infinite;
}
@keyframes rotate-phone-anim {
  0%, 14% { transform: rotate(90deg); }
  46%, 54% { transform: rotate(0deg); }
  86%, 100% { transform: rotate(90deg); }
}
.rotate-arc-top {
  animation: rotate-arc-pulse 2.6s ease-in-out infinite;
}
.rotate-arc-bottom {
  animation: rotate-arc-pulse 2.6s ease-in-out infinite;
  animation-delay: 0.18s;
}
@keyframes rotate-arc-pulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

.rotate-text-jp {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.92);
  letter-spacing: 0.2em;
  text-indent: 0.2em;
  margin: 0 0 10px;
}
.rotate-sound-icon {
  width: 16px;
  height: 16px;
  color: var(--gold-light);
  flex: 0 0 auto;
}
.rotate-text-en {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--gold-text);
  letter-spacing: 0.4em;
  text-indent: 0.4em;
  opacity: 0.75;
  margin: 0;
}

.rotate-ready-btn {
  margin-top: 36px;
  border: 1px solid rgba(221, 147, 0, 0.55);
  color: var(--gold-text);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.5em;
  text-indent: 0.5em;
  padding: 14px 40px;
  background: rgba(10, 11, 16, 0.65);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 0.5s ease, transform 0.5s ease;
  cursor: pointer;
  flex: 0 0 auto;
}
#rotate-prompt[data-ready="true"] .rotate-ready-btn {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
  animation: cs-pulse 2s ease-in-out infinite;
}
#rotate-prompt[data-ready="true"] .rotate-text-jp { color: var(--gold-light); }
#rotate-prompt[data-ready="true"] .rotate-phone-group { animation-play-state: paused; }

/* オープニング動画ステージ */
#opening {
  position: fixed;
  top: var(--app-offset-top);
  left: var(--app-offset-left);
  width: var(--app-width);
  height: var(--app-height);
  background: #000;
  z-index: 800;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
#opening.hide { display: none; }

#opening-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.78) contrast(1.05) saturate(0.85);
}
#opening.video-playing #opening-video { filter: none; }

#opening-buffer {
  position: absolute;
  inset: 0;
  z-index: 7;
  display: none;
  align-items: center;
  justify-content: center;
  padding:
    calc(24px + var(--app-safe-top))
    calc(24px + var(--app-safe-right))
    calc(24px + var(--app-safe-bottom))
    calc(24px + var(--app-safe-left));
  background:
    radial-gradient(
      ellipse 80% 60% at 50% 50%,
      rgba(28, 30, 36, 0.94) 0%,
      rgba(10, 11, 16, 0.98) 100%
    );
  text-align: center;
}
#opening.video-buffering #opening-buffer { display: flex; }
.opening-buffer-inner {
  width: min(320px, 72vw);
  color: var(--gold-text);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.32em;
  text-indent: 0.32em;
}
.opening-buffer-ring {
  width: 42px;
  height: 42px;
  margin: 0 auto 18px;
  border: 1px solid rgba(221, 147, 0, 0.25);
  border-top-color: var(--gold-light);
  border-radius: 50%;
  animation: opening-buffer-spin 1s linear infinite;
}
.opening-buffer-bar {
  width: 100%;
  height: 2px;
  margin-top: 18px;
  background: rgba(221, 147, 0, 0.18);
  overflow: hidden;
}
#opening-buffer-progress {
  display: block;
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--gold) 0%, var(--gold-light) 100%);
  box-shadow: 0 0 12px rgba(221, 147, 0, 0.5);
  transition: width 0.2s linear;
}
@keyframes opening-buffer-spin {
  to { transform: rotate(360deg); }
}

#opening-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding:
    calc(24px + var(--app-safe-top))
    calc(24px + var(--app-safe-right))
    calc(24px + var(--app-safe-bottom))
    calc(24px + var(--app-safe-left));
  background:
    radial-gradient(
      ellipse 120% 80% at 50% 50%,
      transparent 0%,
      rgba(10, 11, 16, 0.5) 65%,
      rgba(10, 11, 16, 0.92) 100%
    ),
    linear-gradient(
      180deg,
      rgba(10, 11, 16, 0.55) 0%,
      rgba(10, 11, 16, 0.15) 30%,
      rgba(10, 11, 16, 0.15) 65%,
      rgba(10, 11, 16, 0.9) 100%
    );
}
#opening.video-playing #opening-overlay { background: transparent; }

/* オープニング中ロゴリビール */
#logo-reveal {
  position: relative;
  z-index: 5;
  text-align: center;
  opacity: 0;
  transform: scale(0.92) translateY(16px);
  transition: opacity 1.5s ease-out, transform 1.5s ease-out;
}
#logo-reveal.show { opacity: 1; transform: scale(1) translateY(0); }
#logo-reveal .logo-jp {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: clamp(2.6rem, 7vw, 4.2rem);
  letter-spacing: 0.32em;
  line-height: 1;
  text-indent: 0.32em;
  background: linear-gradient(
    180deg,
    var(--gold-grad-mid) 0%,
    var(--gold-grad-start) 60%,
    var(--gold-grad-end) 100%
  );
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 0 24px rgba(221, 147, 0, 0.22);
  display: block;
}
#logo-reveal .logo-line {
  width: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--gold) 50%, transparent 100%);
  margin: 18px auto;
  transition: width 1s ease-out 0.3s;
}
#logo-reveal.show .logo-line { width: 220px; }
#logo-reveal .logo-en {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.55em;
  text-indent: 0.55em;
  color: var(--gold-text);
  opacity: 0.8;
  display: block;
}

#enter-btn {
  position: relative;
  z-index: 5;
  margin-top: 40px;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 1s ease-out 0.5s, transform 1s ease-out 0.5s;
}
#enter-btn.show { opacity: 1; transform: translateY(0); }
#enter-btn button {
  background: rgba(10, 11, 16, 0.55);
  border: 1px solid rgba(221, 147, 0, 0.55);
  color: var(--gold-text);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.5em;
  text-indent: 0.5em;
  padding: 14px 44px;
  cursor: pointer;
  transition: all 0.4s ease;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
#enter-btn button:hover {
  border-color: var(--gold);
  color: var(--gold-light);
  box-shadow: 0 0 30px rgba(221, 147, 0, 0.25);
}

/* SKIPボタン */
#skip-btn {
  position: absolute;
  bottom: calc(18px + var(--app-safe-bottom));
  right: calc(18px + var(--app-safe-right));
  z-index: 6;
  background: transparent;
  border: 1px solid rgba(221, 147, 0, 0.3);
  color: var(--gold-text);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.4em;
  text-indent: 0.4em;
  padding: 8px 22px;
  cursor: pointer;
  opacity: 0.6;
  transition: all 0.3s;
}
#skip-btn:hover {
  opacity: 1;
  border-color: var(--gold);
  color: var(--gold-light);
}

/* SKIP後画面 */
#skip-screen {
  position: fixed;
  top: var(--app-offset-top);
  left: var(--app-offset-left);
  width: var(--app-width);
  height: var(--app-height);
  background: #000;
  z-index: 850;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding:
    calc(24px + var(--app-safe-top))
    calc(24px + var(--app-safe-right))
    calc(24px + var(--app-safe-bottom))
    calc(24px + var(--app-safe-left));
  opacity: 0;
  transition: opacity 0.8s ease;
}
#skip-screen.show { display: flex; }
#skip-screen.visible { opacity: 1; }
#skip-screen img {
  max-width: min(280px, 65vw);
  height: auto;
  margin-bottom: 28px;
  filter: drop-shadow(0 0 28px rgba(221, 147, 0, 0.4));
}
#skip-screen .skip-site-name {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(22px, 5vw, 38px);
  color: var(--gold-light);
  letter-spacing: 0.3em;
  text-indent: 0.3em;
  text-shadow: 0 0 36px rgba(221, 147, 0, 0.3);
}
#skip-screen .skip-enter {
  margin-top: 40px;
}
#skip-screen .skip-enter button {
  background: rgba(10, 11, 16, 0.6);
  border: 1px solid rgba(221, 147, 0, 0.55);
  color: var(--gold-text);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.5em;
  text-indent: 0.5em;
  padding: 14px 44px;
  cursor: pointer;
  transition: all 0.4s ease;
}
#skip-screen .skip-enter button:hover {
  border-color: var(--gold);
  color: var(--gold-light);
  box-shadow: 0 0 30px rgba(221, 147, 0, 0.25);
}

@media (orientation: landscape) and (max-height: 500px) {
  #click-start {
    justify-content: flex-start;
  }
  #click-start img {
    max-width: min(180px, 34vw);
    margin-bottom: 20px;
  }
  #click-start .cs-btn {
    padding: 10px 32px;
    font-size: 11px;
  }
  #rotate-prompt {
    align-items: center;
    justify-content: flex-start;
    padding:
      calc(12px + var(--app-safe-top))
      calc(18px + var(--app-safe-right))
      calc(12px + var(--app-safe-bottom))
      calc(18px + var(--app-safe-left));
  }
  .rotate-prompt-inner {
    margin: 0;
    padding: 8px 0 16px;
  }
  .rotate-svg {
    width: min(150px, 38vh, 32vw);
    margin-bottom: 12px;
  }
  .rotate-text-jp {
    font-size: 12px;
    gap: 8px;
    margin-bottom: 6px;
  }
  .rotate-text-en { font-size: 9px; }
  .rotate-ready-btn {
    margin-top: 14px;
    padding: 10px 28px;
    font-size: 11px;
  }
  #logo-reveal .logo-jp {
    font-size: clamp(2rem, 12vh, 3rem);
  }
  #logo-reveal .logo-line {
    margin: 10px auto;
  }
  #logo-reveal .logo-en {
    font-size: 10px;
  }
  #enter-btn {
    margin-top: 20px;
  }
  #enter-btn button,
  #skip-screen .skip-enter button {
    padding: 10px 32px;
    font-size: 11px;
  }
  .opening-buffer-ring {
    width: 34px;
    height: 34px;
    margin-bottom: 12px;
  }
  .opening-buffer-inner {
    font-size: 10px;
  }
  #skip-screen img {
    max-width: min(180px, 34vw);
    margin-bottom: 16px;
  }
  #skip-screen .skip-enter {
    margin-top: 20px;
  }
}

/* 動画進捗バー */
#opening-progress {
  position: absolute;
  bottom: var(--app-safe-bottom);
  left: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--gold) 0%, var(--gold-light) 100%);
  width: 0%;
  transition: width 0.2s linear;
  z-index: 5;
  box-shadow: 0 0 12px rgba(221, 147, 0, 0.6);
}

/* メインサイトを最初は非表示 → サイト入場時に表示 */
#main-site {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.8s ease;
}
#main-site.visible { opacity: 1; pointer-events: all; }