@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500&display=swap');

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

:root {
  --color-bg:       #0a0a14;
  --color-surface:  rgba(10, 10, 20, 0.75);
  --color-border:   rgba(255, 255, 255, 0.12);
  --color-text:     #e8e0d8;
  --color-muted:    #8a8080;
  --color-accent:   #c8a878;
  --color-accent2:  #7890b8;
  --font-main:      'Noto Sans JP', sans-serif;
}

html, body {
  width: 100%;
  min-height: 100vh;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-main);
  font-weight: 400;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

/* ─── 紙グレイン（全ページ共通） ─── */
body::after {
  content: '';
  position: fixed; inset: 0;
  pointer-events: none; z-index: 9999;
  background-image: url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' width='250' height='250'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.88' numOctaves='4' stitchTiles='stitch'/><feColorMatrix type='saturate' values='0'/></filter><rect width='250' height='250' filter='url(%23n)' opacity='0.06' fill='white'/></svg>");
  background-size: 250px 250px;
  mix-blend-mode: soft-light;
  opacity: 0.55;
}

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

button {
  font-family: var(--font-main);
  cursor: pointer;
  border: none;
  outline: none;
}

img {
  display: block;
  max-width: 100%;
  user-select: none;
  -webkit-user-select: none;
  -webkit-user-drag: none;
  pointer-events: none;
}

/* クリック操作が必要な画像はこのクラスを付与 */
img.clickable {
  pointer-events: auto;
}

/* ─── ヘッダー ─── */
#site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 48px;
  background: rgba(255,255,255,0.55);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,0.6);
  transition: background 0.4s, padding 0.4s, box-shadow 0.4s;
}

#site-header.scrolled {
  background: rgba(255,255,255,0.88);
  padding: 12px 48px;
  box-shadow: 0 2px 16px rgba(0,0,0,0.08);
}

.header-logo {
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: #3a2a10;
  transition: opacity 0.25s;
}

.header-logo:hover { opacity: 0.7; }

.header-nav {
  display: flex;
  gap: 36px;
}

.header-nav a {
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #5a4a2a;
  transition: color 0.25s;
}

.header-nav a:hover { color: #1a1a20; }

/* ─── スマホ最適化（ロゴ＋3タブが見切れ・被りしないよう縮小） ─── */
@media (max-width: 600px) {
  #site-header { padding: 10px 12px; gap: 8px; flex-wrap: nowrap; }
  #site-header.scrolled { padding: 8px 12px; }
  .header-logo { font-size: 12px; letter-spacing: 0.04em; white-space: nowrap; flex: 0 1 auto; min-width: 0; }
  .header-nav { gap: 13px; flex: 0 0 auto; white-space: nowrap; }
  .header-nav a { font-size: 10px; letter-spacing: 0.08em; }
}
@media (max-width: 360px) {
  #site-header { padding: 9px 10px; }
  .header-logo { font-size: 11px; }
  .header-nav { gap: 10px; }
  .header-nav a { font-size: 9px; letter-spacing: 0.05em; }
}

/* ─── フッター ─── */
#site-footer {
  background: rgba(6, 5, 12, 0.95);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 28px 48px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
}

.footer-copy {
  font-size: 10px;
  color: rgba(138,128,128,0.45);
  letter-spacing: 0.08em;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(138,128,128,0.5);
  transition: color 0.25s;
}

.footer-links a:hover { color: var(--color-accent); }

/* ─── 杏奈ナビフキダシ ─── */
#anna-nav-bubble {
  position: fixed;
  top: 68px;
  z-index: 300;
  background: rgba(10, 8, 20, 0.92);
  border: 1px solid rgba(200, 168, 120, 0.22);
  border-radius: 8px;
  padding: 12px 16px;
  width: 220px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.25s ease;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

#anna-nav-bubble.show {
  opacity: 1;
}

/* しっぽはJS制御の実要素 (#bubble-tail) で対応 */

#bubble-tail {
  position: absolute;
  top: -7px;
  border-left: 7px solid transparent;
  border-right: 7px solid transparent;
  border-bottom: 7px solid rgba(200, 168, 120, 0.22);
}

#bubble-tail::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 50%;
  transform: translateX(-50%);
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-bottom: 6px solid rgba(10, 8, 20, 0.92);
}

.anb-name {
  display: block;
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
  opacity: 0.6;
  margin-bottom: 6px;
}

.anb-text {
  font-size: 12px;
  line-height: 1.75;
  color: #8888a0;
  font-style: italic;
}

/* ─── スクロール出現 ─── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.85s cubic-bezier(0.22,1,0.36,1), transform 0.85s cubic-bezier(0.22,1,0.36,1);
}
.reveal.revealed { opacity: 1; transform: translateY(0); }

.reveal-left {
  opacity: 0; transform: translateX(-36px);
  transition: opacity 0.85s cubic-bezier(0.22,1,0.36,1), transform 0.85s cubic-bezier(0.22,1,0.36,1);
}
.reveal-left.revealed { opacity: 1; transform: translateX(0); }

.reveal-right {
  opacity: 0; transform: translateX(36px);
  transition: opacity 0.85s cubic-bezier(0.22,1,0.36,1), transform 0.85s cubic-bezier(0.22,1,0.36,1);
}
.reveal-right.revealed { opacity: 1; transform: translateX(0); }

/* stagger 遅延 */
.reveal-d1, .reveal-left.reveal-d1, .reveal-right.reveal-d1 { transition-delay: 0.08s; }
.reveal-d2, .reveal-left.reveal-d2, .reveal-right.reveal-d2 { transition-delay: 0.18s; }
.reveal-d3, .reveal-left.reveal-d3, .reveal-right.reveal-d3 { transition-delay: 0.28s; }
.reveal-d4, .reveal-left.reveal-d4, .reveal-right.reveal-d4 { transition-delay: 0.40s; }
.reveal-d5, .reveal-left.reveal-d5, .reveal-right.reveal-d5 { transition-delay: 0.54s; }

/* ─── 浮遊アニメーション（キャラクター用） ─── */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-11px); }
}
@keyframes floatSlow {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  33%       { transform: translateY(-8px) rotate(0.3deg); }
  66%       { transform: translateY(-5px) rotate(-0.2deg); }
}

/* ─── シーンオブジェクト入場 ─── */
@keyframes sceneEnter {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}
.scene-enter { animation: sceneEnter 0.9s cubic-bezier(0.22,1,0.36,1) both; }

/* ─── トランジションオーバーレイ ─── */
#transition-overlay {
  position: fixed;
  inset: 0;
  background: #000;
  opacity: 0;
  pointer-events: none;
  z-index: 999;
  transition: opacity 0.65s ease;
}

#transition-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.fade-in {
  animation: fadeIn 0.8s ease forwards;
}

.fade-out {
  animation: fadeOut 0.6s ease forwards;
}

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

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