/* base.css — design system「活版 / kappan」 */

/* fonts */
@import url('https://fonts.googleapis.com/css2?family=Shippori+Mincho+B1:wght@400;500;600;700;800&family=Zen+Kaku+Gothic+New:wght@400;500;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

/* design tokens */
:root {
  /* Colors — 紙 */
  --c-bg:       #F2EDE0;   /* 生成り */
  --c-bg-2:     #FAF6EB;   /* 一段明るい紙(カード面) */
  --c-bg-3:     #EAE3D1;   /* 沈んだ紙(インセット面) */
  --c-bg-4:     #DFD5BD;   /* 押された紙 */
  --c-border:   rgba(33, 29, 23, 0.25);
  --c-border-2: rgba(33, 29, 23, 0.12);

  /* Colors — 墨 */
  --c-text:       #211D17;
  --c-text-sub:   #3E382E;
  --c-text-muted: #6B6253;
  --c-text-faint: #998F7B;

  /* Colors — 朱・藍 */
  --c-accent:   #BF3A32;   /* 朱 */
  --c-accent-2: #2C4A6E;   /* 藍 */

  /* 旧グラデーショントークン → 朱・藍の刷り色に置換
     (旧マークアップの background-clip:text がそのまま朱文字になる) */
  --grad-warm:   linear-gradient(135deg, #BF3A32 0%, #A02E27 100%);
  --grad-full:   linear-gradient(135deg, #211D17 0%, #211D17 100%);
  --grad-cool:   linear-gradient(135deg, #2C4A6E 0%, #243C5A 100%);
  --grad-subtle: linear-gradient(135deg, rgba(191,58,50,0.06) 0%, rgba(44,74,110,0.06) 100%);

  /* 旧グラスモーフィズムトークン → 紙の重なりに置換 */
  --glass-bg:     rgba(250, 246, 235, 0.55);
  --glass-bg-2:   rgba(250, 246, 235, 0.85);
  --glass-border: rgba(33, 29, 23, 0.2);
  --glass-blur:   blur(6px);

  /* Typography */
  --font-ja:      'Zen Kaku Gothic New', 'Hiragino Kaku Gothic ProN', Meiryo, sans-serif;
  --font-jp:      'Zen Kaku Gothic New', 'Hiragino Kaku Gothic ProN', Meiryo, sans-serif; /* alias */
  --font-en:      'IBM Plex Mono', 'Courier New', monospace;
  --font-display: 'Shippori Mincho B1', 'Hiragino Mincho ProN', 'Yu Mincho', serif;

  /* Font Sizes — fluid type scale */
  --fs-xs:   clamp(10px, 1.1vw, 12px);
  --fs-sm:   clamp(12px, 1.3vw, 14px);
  --fs-md:   clamp(14px, 1.6vw, 16px);
  --fs-base: clamp(14px, 1.6vw, 16px);
  --fs-lg:   clamp(16px, 2vw, 20px);
  --fs-xl:   clamp(20px, 3vw, 28px);
  --fs-2xl:  clamp(28px, 4.5vw, 48px);
  --fs-3xl:  clamp(40px, 7vw, 80px);
  --fs-4xl:  clamp(56px, 10vw, 120px);

  /* Spacing */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  24px;
  --space-6:  32px;
  --space-7:  48px;
  --space-8:  64px;
  --space-9:  96px;
  --space-10: 128px;

  /* Layout */
  --container-max:     1200px;
  --container-wide:    1440px;
  --container-padding: clamp(24px, 5vw, 80px);
  --section-padding:   clamp(72px, 9vw, 144px);

  /* Borders — 活版 = 角を立てる */
  --radius-sm:   0px;
  --radius-md:   0px;
  --radius-lg:   0px;
  --radius-xl:   0px;
  --radius-full: 0px;

  /* Transitions */
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-out:    cubic-bezier(0, 0, 0.2, 1);
  --dur-fast:    150ms;
  --dur-mid:     280ms;
  --dur-slow:    550ms;

  /* Shadows — 押し圧のハードシャドウ */
  --shadow-sm:     2px 2px 0 rgba(33, 29, 23, 0.18);
  --shadow-md:     4px 4px 0 rgba(33, 29, 23, 0.16);
  --shadow-lg:     6px 6px 0 rgba(33, 29, 23, 0.14);
  --shadow-accent: 4px 4px 0 rgba(191, 58, 50, 0.35);

  /* Nav */
  --nav-height: 64px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-ja);
  font-size: var(--fs-md);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* 紙の繊維 — 全面に薄く乗せる */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 99990;
  pointer-events: none;
  opacity: 0.05;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='p'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23p)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 240px;
}

img, video {
  display: block;
  max-width: 100%;
  height: auto;
}

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

button {
  border: none;
  background: none;
  cursor: pointer;
  font: inherit;
  color: inherit;
}

ul, ol {
  list-style: none;
}

input, textarea, select {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}

/* 旧ページのカーソル追従グロー — 廃止 */
#cursor-glow { display: none !important; }

/* accessibility */
:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  z-index: 100000;
  padding: 8px 16px;
  background: var(--c-accent);
  color: var(--c-bg);
  font-size: var(--fs-sm);
  text-decoration: none;
}
.skip-link:focus {
  top: 16px;
}

/* typography utilities */
.font-ja { font-family: var(--font-ja); }
.font-en { font-family: var(--font-en); }

/* 旧グラデ文字 → 墨/朱のベタ刷り */
.text-gradient {
  background: none;
  -webkit-background-clip: initial;
  background-clip: initial;
  -webkit-text-fill-color: currentColor;
  color: var(--c-text);
}
.text-gradient-warm {
  background: none;
  -webkit-background-clip: initial;
  background-clip: initial;
  -webkit-text-fill-color: currentColor;
  color: var(--c-accent);
}

.text-muted  { color: var(--c-text-muted); }
.text-faint  { color: var(--c-text-faint); }
.text-accent { color: var(--c-accent); }

.label-sm {
  font-family: var(--font-en);
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-text-muted);
}

/* 縦書きユーティリティ */
.v-text {
  writing-mode: vertical-rl;
  text-orientation: mixed;
}

/* 印鑑(朱印) */
.hanko {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.4em;
  height: 2.4em;
  background: var(--c-accent);
  color: #F6F1E5;
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1;
  box-shadow: inset 0 0 0 1.5px #F6F1E5, inset 0 0 0 3px var(--c-accent);
  transform: rotate(-2.5deg);
  user-select: none;
}

/* layout utilities */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.container--wide {
  max-width: var(--container-wide);
}

.section-pad {
  padding-block: var(--section-padding);
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-4 { gap: var(--space-4); }
.gap-5 { gap: var(--space-5); }
.gap-6 { gap: var(--space-6); }

/* navigation — 紙面の欄外(柱) */
#main-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-inline: var(--container-padding);
  background: rgba(242, 237, 224, 0.92);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--c-border);
  transition: transform var(--dur-mid) var(--ease-smooth),
              box-shadow var(--dur-mid) var(--ease-smooth);
}

/* 本の天 — 朱の塗り口 */
#main-nav::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--c-accent);
}

#main-nav.nav-scrolled {
  background: rgba(242, 237, 224, 0.98);
  box-shadow: 0 1px 0 var(--c-border), 0 4px 0 rgba(33, 29, 23, 0.05);
}

#main-nav.nav-hidden {
  transform: translateY(-100%);
}

/* モバイル: ナビバーは不透明にする。
   モバイルブラウザでは transform アニメーション中(スクロールで隠れ→再表示)に
   backdrop-filter が一時的に無効化され、透過分から背後のコンテンツが透けてしまう。
   不透明にすることで透けを防ぐ(色はナビと同じ #F2EDE0 のため見た目は不変)。 */
@media (max-width: 768px) {
  #main-nav,
  #main-nav.nav-scrolled {
    background: var(--c-bg);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
}

.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--c-text);
  line-height: 1;
  white-space: nowrap;
  overflow: visible;
  max-width: none;
}

/* ロゴ先頭の朱印「響」 */
.nav-logo::before {
  content: '響';
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  flex-shrink: 0;
  background: var(--c-accent);
  color: #F6F1E5;
  font-size: 17px;
  font-weight: 700;
  box-shadow: inset 0 0 0 1.5px #F6F1E5, inset 0 0 0 3px var(--c-accent);
  transform: rotate(-2.5deg);
  transition: transform var(--dur-mid) var(--ease-spring);
}

.nav-logo:hover::before {
  transform: rotate(2.5deg);
}

@media (max-width: 768px) {
  .nav-logo {
    font-size: 13px;
    gap: 8px;
  }
  .nav-logo::before {
    width: 26px;
    height: 26px;
    font-size: 15px;
  }
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-links a {
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 500;
  color: var(--c-text-muted);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  transition: color var(--dur-fast) var(--ease-smooth);
  position: relative;
  padding-block: 4px;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--c-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-mid) var(--ease-smooth);
}

/* Suppress all nav link transitions during initial active-state setup */
.nav-no-transition .nav-links a,
.nav-no-transition .nav-links a::after {
  transition: none !important;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--c-text);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
}

/* 言語切替 — 活字の切替(日 / EN) */
.nav-lang,
.footer-lang {
  display: flex;
  align-items: center;
  gap: 0;
  border: 1px solid var(--c-border);
  background: var(--c-bg-2);
}

.lang-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 34px;
  height: 30px;
  padding: 0 8px;
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--c-text-faint);
  opacity: 1;
  transition: background var(--dur-fast) var(--ease-smooth),
              color var(--dur-fast) var(--ease-smooth);
}

.lang-btn:hover {
  opacity: 1;
  background: var(--c-bg-3);
  color: var(--c-text);
}

.lang-btn.active {
  opacity: 1;
  background: var(--c-text);
  color: var(--c-bg);
}

.lang-divider {
  display: none;
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 10px 12px;
  cursor: pointer;
  border: 1px solid var(--c-text);
  background: var(--c-bg-2);
  box-shadow: 2px 2px 0 rgba(33, 29, 23, 0.9);
  transition: transform var(--dur-fast), box-shadow var(--dur-fast);
}

.nav-hamburger:active {
  transform: translate(1px, 1px);
  box-shadow: 1px 1px 0 rgba(33, 29, 23, 0.9);
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--c-text);
  transition: all var(--dur-mid) var(--ease-smooth);
}

/* mobile nav */
.lang-select-mobile { display: none; }
.nav-close-btn      { display: none; }
.nav-lang-item      { display: none; }

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    background: rgba(242, 237, 224, 0.98);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-6);
  }

  /* 紙面の枠罫 */
  .nav-links::before {
    content: '';
    position: absolute;
    inset: 14px;
    border: 1px solid var(--c-border);
    pointer-events: none;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    font-family: var(--font-display);
    font-size: var(--fs-xl);
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: none;
  }

  .nav-hamburger {
    display: flex;
    margin-left: auto;
  }

  .nav-lang {
    display: none;
  }

  .nav-close-btn {
    display: flex;
    position: absolute;
    top: 26px;
    right: 26px;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    line-height: 1;
    color: var(--c-text);
    background: var(--c-bg-2);
    border: 1px solid var(--c-text);
    box-shadow: 2px 2px 0 rgba(33, 29, 23, 0.9);
    cursor: pointer;
    flex-shrink: 0;
  }

  .nav-close-btn:active {
    transform: translate(1px, 1px);
    box-shadow: 1px 1px 0 rgba(33, 29, 23, 0.9);
  }

  .nav-lang-item { display: list-item; }

  .lang-select-mobile {
    display: block;
    margin-top: var(--space-4);
    padding: 10px 20px;
    background: var(--c-bg-2);
    border: 1px solid var(--c-border);
    color: var(--c-text);
    font-size: var(--fs-md);
    font-family: var(--font-en);
    cursor: pointer;
    text-align: center;
    min-width: 160px;
  }

  .lang-select-mobile:focus {
    outline: 2px solid var(--c-accent);
    outline-offset: 2px;
  }
}

/* buttons — 活字を「押す」 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 13px 28px;
  border-radius: 0;
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  transition: transform var(--dur-fast) var(--ease-smooth),
              box-shadow var(--dur-fast) var(--ease-smooth),
              background var(--dur-fast) var(--ease-smooth),
              color var(--dur-fast) var(--ease-smooth);
  cursor: pointer;
  white-space: nowrap;
  position: relative;
}

.btn-primary {
  background: var(--c-accent);
  color: #F6F1E5;
  border: 1px solid var(--c-text);
  box-shadow: 3px 3px 0 rgba(33, 29, 23, 0.9);
}

.btn-primary:hover {
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0 rgba(33, 29, 23, 0.9);
  filter: none;
}

.btn-primary:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 rgba(33, 29, 23, 0.9);
}

.btn-ghost {
  border: 1px solid var(--c-text);
  background: var(--c-bg-2);
  color: var(--c-text);
  box-shadow: 3px 3px 0 rgba(33, 29, 23, 0.18);
}

.btn-ghost:hover {
  background: var(--c-text);
  color: var(--c-bg);
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0 rgba(33, 29, 23, 0.25);
}

.btn-ghost:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 rgba(33, 29, 23, 0.25);
}

.btn-icon {
  padding: 12px;
  border-radius: 0;
  border: 1px solid var(--c-border);
  background: var(--c-bg-2);
  transition: all var(--dur-fast) var(--ease-smooth);
}

.btn-icon:hover {
  border-color: var(--c-text);
  box-shadow: 2px 2px 0 rgba(33, 29, 23, 0.2);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 11px;
}

/* cards — 紙片 */
.card {
  background: var(--c-bg-2);
  border: 1px solid var(--c-border);
  border-radius: 0;
  overflow: hidden;
  transition: border-color var(--dur-mid) var(--ease-smooth),
              transform var(--dur-mid) var(--ease-smooth),
              box-shadow var(--dur-mid) var(--ease-smooth);
}

.card:hover {
  border-color: var(--c-text);
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 rgba(33, 29, 23, 0.85);
}

.card-glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--c-border);
  border-radius: 0;
}

/* Tech badge — 込め物(活字スペーサー) */
.tech-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 9px;
  border-radius: 0;
  font-family: var(--font-en);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: transparent;
  border: 1px solid var(--c-border);
  color: var(--c-text-muted);
  white-space: nowrap;
}

/* section header — 「第◯◯」の見出し組み */
.section-header {
  display: flex;
  align-items: baseline;
  gap: var(--space-4);
  margin-bottom: var(--space-9);
  position: relative;
}

/* 末尾まで伸びる罫線 */
.section-header::after {
  content: '';
  flex: 1;
  align-self: center;
  height: 5px;
  margin-left: var(--space-4);
  border-top: 1px solid var(--c-text);
  border-bottom: 1px solid var(--c-border);
}

.section-num {
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 600;
  color: #F6F1E5;
  background: var(--c-accent);
  letter-spacing: 0.1em;
  padding: 4px 8px;
  align-self: center;
  transform: rotate(-2deg);
  box-shadow: 2px 2px 0 rgba(33, 29, 23, 0.2);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--c-text);
}

.section-title-ja {
  font-family: var(--font-ja);
  font-size: var(--fs-sm);
  color: var(--c-text-muted);
  margin-left: var(--space-3);
  font-weight: 400;
  letter-spacing: 0.2em;
}

/* cookie banner — 紙の付箋 */
#cookie-banner {
  position: fixed;
  bottom: 24px;
  left: 24px;
  right: 24px;
  max-width: 460px;
  z-index: 2000;
  background: var(--c-bg-2);
  border: 1px solid var(--c-text);
  border-radius: 0;
  padding: var(--space-5) var(--space-6);
  box-shadow: 5px 5px 0 rgba(33, 29, 23, 0.85);
  transform: translateY(calc(100% + 40px));
  transition: transform var(--dur-slow) var(--ease-spring);
}

#cookie-banner::before {
  content: 'NOTICE';
  position: absolute;
  top: -1px;
  left: 16px;
  transform: translateY(-50%);
  font-family: var(--font-en);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.2em;
  padding: 2px 8px;
  background: var(--c-text);
  color: var(--c-bg);
}

#cookie-banner.visible {
  transform: translateY(0);
}

#cookie-banner.hidden {
  display: none;
}

.cookie-text {
  font-size: var(--fs-sm);
  color: var(--c-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-4);
}

.cookie-text a {
  color: var(--c-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.cookie-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.cookie-accept,
.cookie-reject {
  padding: 8px 20px;
  border-radius: 0;
  font-size: var(--fs-sm);
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--dur-fast), box-shadow var(--dur-fast), background var(--dur-fast), color var(--dur-fast);
}

.cookie-accept {
  background: var(--c-accent);
  border: 1px solid var(--c-text);
  color: #F6F1E5;
  box-shadow: 2px 2px 0 rgba(33, 29, 23, 0.9);
}

.cookie-accept:hover {
  transform: translate(-1px, -1px);
  box-shadow: 3px 3px 0 rgba(33, 29, 23, 0.9);
  filter: none;
}

.cookie-reject {
  background: var(--c-bg-2);
  border: 1px solid var(--c-border);
  color: var(--c-text-muted);
}

.cookie-reject:hover {
  background: var(--c-bg-3);
  color: var(--c-text);
}

/* author badge (shared footer signature) */
.author-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-4);
  border-radius: 0;
  border: 1px solid var(--c-border);
  background: var(--c-bg-2);
  font-size: var(--fs-sm);
  color: var(--c-text-muted);
  transition: all var(--dur-mid) var(--ease-smooth);
}

.author-badge:hover {
  color: var(--c-text);
  border-color: var(--c-text);
  box-shadow: 2px 2px 0 rgba(33, 29, 23, 0.2);
}

.author-badge .dot {
  width: 7px;
  height: 7px;
  border-radius: 0;
  background: var(--c-accent);
  flex-shrink: 0;
  transform: rotate(45deg);
}

/* footer — 奥付 */
.site-footer {
  border-top: 1px solid var(--c-text);
  padding-block: var(--space-9) var(--space-7);
  position: relative;
  background: var(--c-bg);
}

/* 奥付の二重罫 */
.site-footer::before {
  content: '';
  position: absolute;
  top: 3px;
  left: 0;
  right: 0;
  width: auto;
  transform: none;
  height: 1px;
  background: var(--c-border);
  opacity: 1;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: start;
  gap: var(--space-7);
}

.footer-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  line-height: 1;
  background: var(--c-accent);
  color: #F6F1E5;
  -webkit-text-fill-color: #F6F1E5;
  box-shadow: inset 0 0 0 1.5px #F6F1E5, inset 0 0 0 3px var(--c-accent);
  transform: rotate(-2.5deg);
}

.footer-tagline {
  font-family: var(--font-en);
  letter-spacing: 0.06em;
}

.footer-links {
  display: flex;
  gap: var(--space-5);
}

.footer-links a {
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-text-muted);
  transition: color var(--dur-fast);
  position: relative;
}

.footer-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--c-accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--dur-mid) var(--ease-smooth);
}

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

.footer-links a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.footer-copy {
  font-size: var(--fs-xs);
  color: var(--c-text-faint);
  font-family: var(--font-en);
  letter-spacing: 0.04em;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-7);
  padding-top: var(--space-5);
  border-top: 1px solid var(--c-border);
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-social {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 0;
  border: 1px solid var(--c-border);
  color: var(--c-text-muted);
  font-size: 18px;
  background: var(--c-bg-2);
  transition: all var(--dur-fast) var(--ease-smooth);
}

.footer-social:hover {
  color: var(--c-bg);
  background: var(--c-text);
  border-color: var(--c-text);
  transform: none;
  box-shadow: 2px 2px 0 rgba(33, 29, 23, 0.25);
}

/* footer — mobile: stack into one centred column */
@media (max-width: 768px) {
  .footer-inner {
    grid-template-columns: 1fr;
    gap: var(--space-5);
    text-align: center;
  }
  .footer-links {
    flex-wrap: wrap;
    gap: var(--space-4);
    justify-content: center;
  }
  .footer-lang {
    justify-content: center;
    margin-inline: auto;
    width: fit-content;
  }
}

/* scroll animations (gsap targets — initial state) */
.reveal {
  opacity: 0;
  transform: translateY(30px);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-30px);
}

.reveal-right {
  opacity: 0;
  transform: translateX(30px);
}

/* scrollbar styling */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--c-bg);
  border-left: 1px solid var(--c-border-2);
}
::-webkit-scrollbar-thumb {
  background: var(--c-bg-4);
  border-radius: 0;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--c-text-faint);
}

/* selection — 朱で刷る */
::selection {
  background: var(--c-accent);
  color: #F6F1E5;
}

/* noise texture overlay (互換 — body::before があるためほぼ不可視) */
.noise-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0;
}

/* utility classes */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border-width: 0;
}

.overflow-hidden { overflow: hidden; }
.relative { position: relative; }
.absolute { position: absolute; }
.w-full { width: 100%; }
.h-full { height: 100%; }
.inset-0 { inset: 0; }
.z-10 { z-index: 10; }
.pointer-none { pointer-events: none; }

/* content protection */
* {
  user-select: none;
  -webkit-user-select: none;
}

img {
  -webkit-user-drag: none;
  user-drag: none;
  -webkit-touch-callout: none;
  pointer-events: none;
}