/* ==========================================================================
   YAMABERK - SESSHU BOLD WHITE SPACE & SEAL-ONLY RED ACCENT SYSTEM
   白と余白の美 × 濃墨 × 鮮烈な青 × 朱赤（印鑑・落款ハンコ限定）
   ========================================================================== */

:root {
  /* Warm Washi & High Contrast Ink Palette */
  --bg-paper-white: #f7f5f1;        /* 和紙白（少しくすんだ温かみ） */
  --bg-card-white: #fdfcf9;         /* ほぼ白・カード面 */
  --bg-section-gray: #eeebe4;       /* 温かみのある淡墨灰 */
  
  --ink-black: #050811;             /* 濃墨（メイン文字） */
  --ink-gray: #334155;              /* 中墨（本文・説明） */
  --ink-light-gray: #94a3b8;        /* 淡墨 */
  
  /* P3R Electric Blue System */
  --blue-primary: #0052cc;          /* 群青 */
  --cyan-bright: #00b8e6;           /* 鮮烈浅葱 */
  
  /* Vermilion Stamp Accent (印鑑・落款ハンコ限定) */
  --vermilion-red: #e60033;         /* 丹朱印 */
  --vermilion-glow: rgba(230, 0, 51, 0.25);
  
  /* Four Seasons Accents */
  --season-spring: #e60067;
  --season-summer: #00a854;
  --season-autumn: #d96200;
  --season-winter: #0088cc;
  
  /* Geometry & Skew */
  --skew-angle: -4deg;
  --skew-reverse: 4deg;
  
  /* Fonts */
  --font-brush: 'Shippori Mincho B1', 'Zen Old Mincho', serif;
  --font-display: 'Teko', 'Noto Sans JP', sans-serif;
  --font-body: 'Noto Sans JP', sans-serif;
}

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

body {
  background-color: var(--bg-paper-white);
  color: var(--ink-black);
  font-family: var(--font-body);
  line-height: 1.8;
  overflow-x: hidden;
  position: relative;
}

.kanji-brush-text {
  font-family: var(--font-brush);
  font-weight: 800;
  letter-spacing: 1px;
}

.blue-text {
  color: var(--blue-primary);
}

/* Vermilion Stamp Accent (四角角印・洗練朱赤落款「山」) */
.vermilion-stamp {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: 'Yuji Syuku', 'Shippori Mincho B1', 'Zen Old Mincho', serif;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--vermilion-red);
  border: 2px solid var(--vermilion-red);
  padding: 1px 6px;
  border-radius: 2px; /* 端正な四角形・角印 */
  line-height: 1;
  vertical-align: middle;
  transform: rotate(-8deg);
  box-shadow: none; /* 赤いにじみ削除 */
}

.vermilion-stamp-footer {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: 'Yuji Syuku', 'Shippori Mincho B1', 'Zen Old Mincho', serif;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--vermilion-red);
  border: 2px solid var(--vermilion-red);
  padding: 2px 7px;
  border-radius: 2px; /* 端正な四角形・角印 */
  line-height: 1;
  vertical-align: middle;
  transform: rotate(-5deg);
  box-shadow: none; /* 赤いにじみ削除 */
}

/* ==========================================================================
   BACKGROUND WORLD: Mountains Only (霧は削除済み)
   ========================================================================== */
.bg-ink-world {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: -3;
  overflow: hidden;
}

.ink-mountain-layer {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  background-repeat: repeat-x;
  background-position: bottom center;
}

.bg-peaks-far {
  height: 45vh;
  clip-path: polygon(0% 100%, 15% 42%, 32% 72%, 52% 28%, 72% 68%, 88% 38%, 100% 100%);
  background: linear-gradient(180deg, rgba(180, 192, 210, 0.35) 0%, rgba(140, 155, 175, 0.12) 60%, rgba(247, 245, 241, 0.95) 100%);
  opacity: 0.9;
}

.bg-peaks-mid {
  height: 28vh;
  clip-path: polygon(0% 100%, 12% 52%, 28% 82%, 45% 42%, 65% 78%, 82% 32%, 95% 68%, 100% 100%);
  background: linear-gradient(180deg, rgba(0, 60, 160, 0.08) 0%, rgba(247, 245, 241, 0.98) 90%);
  opacity: 0.92;
}

/* ==========================================================================
   yb-STYLE ANIMATIONS  ―― clip-path & transform のみ（GPU合成レイヤー）
   ========================================================================== */

/* ── 1. ローディングスラッシュ：ページを斬って消える ── */
#yb-load-slash {
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  overflow: hidden;
}

#yb-load-slash::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--ink-black);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
  animation: slash-cover 0.55s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

#yb-load-slash::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--blue-primary);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
  animation: slash-cover 0.55s 0.08s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

@keyframes slash-cover {
  0%   { clip-path: polygon(-10% 0, 110% 0, 110% 100%, -10% 100%); }
  100% { clip-path: polygon(110% 0, 110% 0, 110% 100%, 110% 100%); }
}

/* ── 2. ヒーローテキスト：行ごとにwipe-in（左から拭き出す） ── */
.yb-wipe {
  display: inline-block;
  clip-path: polygon(0 0, 0 0, 0 100%, 0 100%);
  animation: yb-wipe-in 0.5s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.yb-wipe-delay-1 { animation-delay: 0.55s; }
.yb-wipe-delay-2 { animation-delay: 0.75s; }

@keyframes yb-wipe-in {
  0%   { clip-path: polygon(0 0, 0 0, 0 100%, 0 100%); }
  100% { clip-path: polygon(0 0, 110% 0, 110% 100%, 0 100%); }
}

/* ── 3. セクション番号スタンプ：stamp-in（ドンと押す） ── */
.section-title .num {
  display: inline-block;
  transform-origin: center center;
}

.num.stamp-active {
  animation: yb-stamp 0.5s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes yb-stamp {
  0%   { transform: scale(1.6) rotate(-12deg); opacity: 0; }
  55%  { transform: scale(0.9) rotate(-1deg);  opacity: 1; }
  100% { transform: scale(1)   rotate(0deg);   opacity: 1; }
}

/* ── 4. カード：上からslide-in（常にskewX平行四辺形を保持） ── */
.card-slide-ready {
  opacity: 0;
  transform: skewX(var(--skew-angle)) translateY(24px);
  transition: opacity 0.4s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.card-slide-ready.card-visible {
  opacity: 1;
  transform: skewX(var(--skew-angle)) translateY(0);
}

/* ★ 領域選定カテゴリ切替アニメーション (Phase 1: 縮小フェードアウト / Phase 2: 時間差上昇スライドイン) */
.yb-card-exit {
  opacity: 0 !important;
  transform: skewX(var(--skew-angle)) scale(0.9) translateY(25px) !important;
  transition: opacity 0.16s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.16s cubic-bezier(0.22, 1, 0.36, 1) !important;
}

@keyframes ybCardSlideIn {
  0% {
    opacity: 0;
    transform: skewX(var(--skew-angle)) translateY(45px) scale(0.94);
  }
  65% {
    opacity: 1;
    transform: skewX(var(--skew-angle)) translateY(-4px) scale(1.01);
  }
  100% {
    opacity: 1;
    transform: skewX(var(--skew-angle)) translateY(0) scale(1);
  }
}

.yb-card-filter-anim {
  animation: ybCardSlideIn 0.48s cubic-bezier(0.22, 1, 0.36, 1) forwards !important;
}

/* ── 5. ヒーローdesc：左ボーダーと共にフェードイン ── */
.yb-fade-up {
  opacity: 0;
  transform: translateY(14px);
  animation: yb-fade-up 0.5s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.yb-fade-up-delay-1 { animation-delay: 0.95s; }
.yb-fade-up-delay-2 { animation-delay: 1.1s; }

@keyframes yb-fade-up {
  0%   { opacity: 0; transform: translateY(14px); }
  100% { opacity: 1; transform: translateY(0); }
}

/* Four Seasons Badges */
.season-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 2px;
  margin-right: 8px;
}

.season-tag.spring { background: rgba(230, 0, 103, 0.1); color: var(--season-spring); border: 1px solid var(--season-spring); }
.season-tag.summer { background: rgba(0, 168, 84, 0.1); color: var(--season-summer); border: 1px solid var(--season-summer); }
.season-tag.autumn { background: rgba(217, 98, 0, 0.1); color: var(--season-autumn); border: 1px solid var(--season-autumn); }
.season-tag.winter { background: rgba(0, 136, 204, 0.1); color: var(--season-winter); border: 1px solid var(--season-winter); }

/* Header UI */
.main-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(16px);
  border-bottom: 2px solid var(--ink-black);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-box {
  transform: skewX(var(--skew-angle));
}

.logo-sub {
  font-family: var(--font-display);
  font-size: 0.85rem;
  letter-spacing: 3px;
  color: var(--blue-primary);
  display: block;
}

.logo-main {
  font-size: 2.3rem;
  line-height: 1.1;
  color: var(--ink-black);
}

.main-nav ul {
  display: flex;
  list-style: none;
  gap: 8px;
}

/* Hamburger Button (Yamaberk Slanted Parallelogram Button) */
.nav-toggle {
  display: none;
  background: #ffffff;
  border: 2px solid var(--ink-black);
  width: 46px;
  height: 46px;
  padding: 11px 9px;
  cursor: pointer;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  flex-shrink: 0;
  transform: skewX(var(--skew-angle)); /* Yamaberk斜め平行四辺形ボタン */
  box-shadow: 3px 3px 0px var(--blue-primary);
  transition: transform 0.15s cubic-bezier(0.22, 1, 0.36, 1),
              box-shadow 0.15s ease,
              background-color 0.2s ease;
  position: relative;
  z-index: 201;
}

.nav-toggle:active {
  transform: skewX(var(--skew-angle)) scale(0.94);
  box-shadow: 1px 1px 0px var(--blue-primary);
}

.nav-toggle .bar {
  display: block;
  width: 100%;
  height: 3px;
  background-color: var(--ink-black);
  border-radius: 1px;
  transition: transform 0.28s cubic-bezier(0.22, 1, 0.36, 1),
              opacity 0.2s ease,
              background-color 0.2s ease;
  transform-origin: center;
}

/* 開いた時：YamaberkスタイリッシュスラッシュXへの変形アニメーション */
.nav-toggle.open {
  background: var(--ink-black);
  border-color: var(--ink-black);
  box-shadow: 3px 3px 0px var(--blue-primary);
}

.nav-toggle.open .bar {
  background-color: #ffffff;
}

.nav-toggle.open .bar-1 {
  transform: translateY(7.5px) rotate(45deg);
}

.nav-toggle.open .bar-2 {
  opacity: 0;
  transform: scaleX(0);
}

.nav-toggle.open .bar-3 {
  transform: translateY(-7.5px) rotate(-45deg);
}

.main-nav a {
  color: var(--ink-black);
  text-decoration: none;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 700;
  /* 44px min touch target (padding accounts for line-height) */
  padding: 10px 14px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  position: relative;
  transform: skewX(var(--skew-angle));
  transition: color 0.15s cubic-bezier(0.22, 1, 0.36, 1);
  background: transparent;
}

.main-nav a::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--blue-primary);
  z-index: -1;
  transform: scaleX(0);
  transform-origin: right;
  /* Sharper P3R-style swipe: faster + snappier overshoot */
  transition: transform 0.18s cubic-bezier(0.22, 1, 0.36, 1);
}

.main-nav a:hover,
.main-nav li.active a {
  color: #ffffff;
}

.main-nav a:hover::before,
.main-nav li.active a::before {
  transform: scaleX(1);
  transform-origin: left;
}

/* Hero Section */
.hero-section {
  position: relative;
  padding: 36px 24px 50px; /* 上部余白を半分(72px→36px)に短縮して間延び感を解消 */
  max-width: 1200px;
  margin: 0 auto;
  overflow: visible;
}

.hero-skew-bg {
  position: absolute;
  top: 6px;
  bottom: 14px; /* 下部コマンドバーの手前で平行四辺形の「左下の角」を露出 */
  left: 0;
  width: 100%;
  background: linear-gradient(135deg, rgba(241, 245, 249, 0.88) 0%, rgba(255, 255, 255, 0.98) 100%);
  transform: skewX(var(--skew-angle)); /* スタイリッシュなYamaberk平行四辺形 (-4deg) */
  border-left: none; /* 左側の青太線を削除して窮屈感を解消・余白感を向上 */
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.03);
  z-index: -1;
  pointer-events: none;
}

.badge-skew {
  display: inline-block;
  background: var(--ink-black);
  color: #ffffff;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 2px;
  padding: 4px 18px;
  transform: skewX(var(--skew-angle));
  border-left: 4px solid var(--blue-primary);
  margin-bottom: 14px;
}

.hero-title {
  font-size: 3.6rem;
  line-height: 1.2;
  margin-bottom: 21px; /* 24px → 21px (3pxタイト化) */
  color: var(--ink-black);
}

.skew-block {
  display: inline-block;
  padding: 6px 22px;
  transform: skewX(var(--skew-angle));
  margin-bottom: 8px;
}

.skew-block.black-ink {
  background: var(--ink-black);
  color: #ffffff;
}

.skew-block.blue-bg {
  background: var(--blue-primary);
  color: #ffffff;
  box-shadow: 4px 4px 0px var(--ink-black);
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--ink-gray);
  max-width: 640px;
  margin-bottom: 37px; /* 40px → 37px (3pxタイト化) */
  border-left: 4px solid var(--blue-primary);
  padding-left: 18px;
}

.hero-stats {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.stat-card {
  background: #ffffff;
  border: 1px solid var(--ink-black);
  padding: 16px 24px;
  transform: skewX(var(--skew-angle));
  box-shadow: 4px 4px 0px var(--blue-primary);
}

.stat-label {
  display: block;
  font-family: var(--font-display);
  font-size: 0.85rem;
  letter-spacing: 1px;
  color: var(--ink-light-gray);
}

.stat-value {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--blue-primary);
}

.stat-value small {
  font-size: 1rem;
  color: var(--ink-black);
  font-family: var(--font-body);
}

/* Command Bar */
.command-bar {
  background: #ffffff;
  border-top: 1px solid rgba(0, 0, 0, 0.08);
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  padding: 14px 0; /* 16px → 14px (2pxタイト化) */
  margin-bottom: 57px; /* 60px → 57px (3pxタイト化) */
}

.command-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.cmd-label {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--blue-primary);
  letter-spacing: 2px;
}

.cmd-buttons {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.cmd-btn {
  background: var(--bg-section-gray);
  color: var(--ink-gray);
  border: 1px solid rgba(0, 0, 0, 0.15);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.95rem;
  /* 44px min touch target for mobile */
  padding: 10px 20px;
  min-height: 44px;
  cursor: pointer;
  transform: skewX(var(--skew-angle));
  position: relative;
  z-index: 1;
  overflow: hidden;
  transition: color 0.18s cubic-bezier(0.22, 1, 0.36, 1),
              box-shadow 0.18s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.18s cubic-bezier(0.22, 1, 0.36, 1);
}

/* ヘッダーナビ「やまべるくについて」等と完全同一のYamaberkブルーワイプアニメーション */
.cmd-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--blue-primary);
  z-index: -1;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.18s cubic-bezier(0.22, 1, 0.36, 1);
}

.cmd-btn:hover,
.cmd-btn.active {
  color: #ffffff;
  font-weight: 900;
  box-shadow: 3px 3px 0px var(--ink-black);
  transform: skewX(var(--skew-angle)) translateY(-2px);
}

.cmd-btn:hover::before,
.cmd-btn.active::before {
  transform: scaleX(1);
  transform-origin: left;
}

/* ★ 超スタイリッシュ＆高速 Yamaberk 斜めスラッシュイン切替アニメーション (0.24s) */
@keyframes ybSlashIn {
  0% {
    opacity: 0;
    clip-path: polygon(0 0, 0 0, 0 100%, 0 100%);
    transform: skewX(var(--skew-angle)) translateX(-15px);
  }
  100% {
    opacity: 1;
    clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
    transform: skewX(var(--skew-angle)) translateX(0);
  }
}

.yb-card-slash-in {
  animation: ybSlashIn 0.24s cubic-bezier(0.16, 1, 0.3, 1) forwards !important;
}

/* Section Common */
.section-container {
  max-width: 1200px;
  margin: 0 auto 97px; /* 100px → 97px (3pxタイト化) */
  padding: 0 24px;
}

.section-header {
  margin-bottom: 37px; /* 40px → 37px (3pxタイト化) */
  position: relative;
}

.section-title {
  font-size: 2.2rem;
  letter-spacing: 2px;
  display: flex;
  align-items: center;
  gap: 16px;
  color: var(--ink-black);
}

/* ★ 控えめ淡灰ミニマルタグ (PC画面用：アラビア数字「01」「02」拡大表示) */
.num-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-section-gray); /* 淡いグレーベージュ #eeebe4 */
  color: var(--blue-primary);
  padding: 6px 18px 6px 14px;
  transform: skewX(-8deg);
  border: 1px solid rgba(0, 0, 0, 0.12);
  border-left: 4px solid var(--blue-primary);
  box-shadow: none; /* ドット影・立体影なしで静かに馴染ませる */
  line-height: 1;
  vertical-align: middle;
  transition: transform 0.2s cubic-bezier(0.22, 1, 0.36, 1);
}

.num-badge.stamp-active {
  animation: yb-stamp-badge 0.45s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes yb-stamp-badge {
  0%   { transform: skewX(-8deg) translateY(-6px); opacity: 0; }
  100% { transform: skewX(-8deg) translateY(0);    opacity: 1; }
}

.num-badge .en-num {
  font-family: var(--font-display);
  font-size: 2.1rem; /* PC画面：しっかり見やすい大きめサイズ */
  font-weight: 700;
  color: var(--blue-primary);
  letter-spacing: 1px;
  transform: skewX(8deg); /* 文字の直立補正 */
}

.section-title small {
  font-size: 1rem;
  color: var(--ink-light-gray);
  font-family: var(--font-display);
  letter-spacing: 2px;
}

.brush-underline {
  height: 4px;
  background: linear-gradient(90deg, var(--blue-primary) 0%, var(--ink-black) 80%, transparent 100%);
  margin-top: 8px;
  transform: skewX(var(--skew-angle));
}

/* Mountain Logs Card Grid */
/* ★ PC画面：3枚並びのサイズを基本とし、1枚・2枚時も横幅を広げず完全固定 */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
}

/* ★ ホバー時の太枠スタイルをデフォルトに固定 ＋ ホバー時青影 ＋ キラッと光のライン走出 */
.yb-card {
  background: var(--bg-card-white);
  border: 2px solid var(--blue-primary); /* デフォルトで青枠に設定 */
  position: relative;
  overflow: hidden;
  transform: skewX(var(--skew-angle)); /* 全体外枠：平行四辺形 (-4deg) */
  transition: transform 0.25s cubic-bezier(0.22, 1, 0.36, 1),
              border-color 0.25s ease,
              box-shadow 0.25s ease;
  box-shadow: 0 6px 18px rgba(0, 82, 204, 0.12);
}

/* ホバー時：鮮烈な青い発光オーラ ＋ 右下ブルーオフセットスラブ影(8px 8px)がバシッと強調出現 */
.yb-card:hover,
.yb-card.active {
  transform: skewX(var(--skew-angle)) translateY(-8px) !important;
  border-color: var(--blue-primary) !important;
  box-shadow: 0 0 28px rgba(0, 82, 204, 0.45), 8px 8px 0px var(--blue-primary) !important;
}

/* ★ キラッと光の反射ライン（50%光量を引き上げた銀白色の流光エフェクト） */
.yb-card::after {
  content: '';
  position: absolute;
  top: -60%;
  left: -150%;
  width: 50%;
  height: 220%;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(240, 245, 255, 0.10) 20%,
    rgba(245, 250, 255, 0.52) 50%,
    rgba(210, 225, 245, 0.36) 65%,
    transparent 100%
  );
  transform: rotate(25deg);
  pointer-events: none;
  z-index: 10;
  opacity: 0;
}

.yb-card:hover::after {
  opacity: 1;
  animation: shine-sweep 0.65s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

@keyframes shine-sweep {
  0% {
    left: -150%;
    top: -60%;
  }
  100% {
    left: 180%;
    top: 60%;
  }
}

/* 画像フレーム：カード外枠にぴったり沿う平行四辺形カット (-4deg) */
.card-image-wrap {
  position: relative;
  height: 220px;
  overflow: hidden;
  border-bottom: 2px solid var(--ink-black);
}

/* 画像写真：逆角度(+4deg)で補正 → 山の風景や被写体は100%直立 */
.card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: skewX(calc(-1 * var(--skew-angle))) scale(1.25);
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.yb-card:hover .card-img {
  transform: skewX(calc(-1 * var(--skew-angle))) scale(1.32);
}

/* 水墨オーバーレイ */
.ink-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 65%, rgba(5, 8, 17, 0.25) 100%);
  pointer-events: none;
}

/* 地域バッジ（平行四辺形枠 ＋ 内のテキスト直立補正） */
.jp-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
  background: var(--ink-black);
  color: #ffffff;
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 700;
  padding: 4px 14px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  transform: skewX(calc(-1 * var(--skew-angle))); /* テキスト直立 */
}

/* 標高バッジ（平行四辺形枠 ＋ 内のテキスト直立補正） */
.card-altitude {
  position: absolute;
  bottom: 12px;
  right: 12px;
  z-index: 2;
  background: var(--blue-primary);
  color: #ffffff;
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  padding: 2px 14px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  transform: skewX(calc(-1 * var(--skew-angle))); /* テキスト直立 */
}

/* カード本文領域 */
.card-body {
  padding: 22px 24px 24px;
  position: relative;
  background: var(--bg-card-white);
  color: var(--ink-black);
}

/* ★ テキスト要素の100%直立補正 (Counter-skew: +4deg) */
.card-meta,
.card-title,
.spec-lbl,
.spec-val {
  display: block;
  transform: skewX(calc(-1 * var(--skew-angle))); /* 文字の傾きを打ち消して完全直立化 */
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--ink-light-gray);
  margin-bottom: 10px;
}

.card-title {
  font-size: 1.15rem;
  line-height: 1.5;
  margin-bottom: 18px;
  color: var(--ink-black);
}

/* スペック表（カード外枠と角度を揃えた平行四辺形インセット ＋ ★直立） */
.spec-table {
  background: var(--bg-section-gray);
  padding: 12px 16px;
  display: flex;
  justify-content: space-between;
  margin-bottom: 20px;
  border-left: 4px solid var(--blue-primary);
}

.spec-item {
  display: flex;
  flex-direction: column;
}

.spec-lbl {
  font-size: 0.75rem;
  color: var(--ink-light-gray);
}

.spec-val {
  font-weight: 700;
  font-size: 1rem;
  color: var(--ink-black);
}

.blue-text, .cyan-text, .spec-val.blue-text, .spec-val.cyan-text {
  color: var(--blue-primary) !important;
}

/* ボタン（外枠は斜め ＋ 中の文字は100%直立） */
.read-more-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 44px;
  background: #ffffff;
  color: var(--ink-black);
  border: 1px solid var(--ink-black);
  padding: 10px 18px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 1px;
  text-decoration: none;
  transition: all 0.2s cubic-bezier(0.22, 1, 0.36, 1);
  box-shadow: 2px 2px 0px var(--blue-primary);
}

.read-more-btn {
  transform: none; /* 外枠の傾斜を継承 */
}

/* ボタン内部のテキストと矢印を直立化 */
.read-more-btn > * {
  display: inline-block;
  transform: skewX(calc(-1 * var(--skew-angle)));
}

.read-more-btn:hover {
  background: var(--blue-primary);
  color: #ffffff;
  border-color: var(--blue-primary);
  box-shadow: 4px 4px 0px var(--ink-black);
}

.read-more-btn .arrow {
  transition: transform 0.2s ease;
}

.read-more-btn:hover .arrow {
  transform: translateX(5px) skewX(calc(-1 * var(--skew-angle)));
}

/* Gear Lab Section */
.gear-section {
  background: #ffffff;
  padding: 40px 24px;
  border: 1px solid rgba(0, 0, 0, 0.1);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
  position: relative;
}

.gear-main-card {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 40px;
  align-items: center;
}

@media (max-width: 900px) {
  .gear-main-card {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   RESPONSIVE: Smartphone (<=768px)
   ============================================================ */
@media (max-width: 768px) {
  /* 1. ヘッダー余白拡大 ＆ サブタイトルの1行・洗練化（2行の折り返し文字を解消） */
  .header-inner {
    padding: 14px 20px; /* 余白を拡大して窮屈感を解消 */
    gap: 16px;
  }
  
  .sub-jp {
    display: none; /* スマホでは長い日本語文言を隠し、1行でスタイリッシュに集約 */
  }

  .sub-en {
    font-family: var(--font-display);
    font-size: 0.85rem;
    letter-spacing: 2.5px;
    color: var(--blue-primary);
    font-weight: 700;
  }

  .logo-main {
    font-size: 1.75rem;
  }

  /* 2. ハンバーガーボタン：斜め平行四辺形 */
  .nav-toggle {
    display: flex;
  }

  /* 3. Yamaberk スピードワイプカーテン・ドロワーメニュー（重くならず超高速・スタイリッシュ） */
  .main-nav {
    display: block;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: rgba(5, 8, 17, 0.96); /* Yamaberkスタイルのダークインク背景 */
    backdrop-filter: blur(12px);
    border-top: 3px solid var(--blue-primary);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
    z-index: 200;
    clip-path: polygon(0 0, 100% 0, 100% 0, 0 0); /* 閉じ状態 */
    transition: clip-path 0.35s cubic-bezier(0.22, 1, 0.36, 1);
    pointer-events: none;
  }

  .main-nav.open {
    clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%); /* 開き状態（高速スラッシュカーテン） */
    pointer-events: auto;
  }

  .main-nav ul {
    flex-direction: column;
    gap: 10px;
    padding: 20px 20px 24px;
  }

  .main-nav a {
    transform: skewX(-6deg); /* スマホメニュー項目もYamaberk平行四辺形バッジ */
    width: 100%;
    padding: 12px 20px;
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: rgba(255, 255, 255, 0.05);
    font-size: 1.05rem;
    transition: all 0.2s cubic-bezier(0.22, 1, 0.36, 1);
  }

  .main-nav a:hover,
  .main-nav li.active a {
    background: var(--blue-primary);
    border-color: var(--blue-primary);
    color: #ffffff;
    box-shadow: 4px 4px 0px var(--ink-black);
  }

  /* Hero adjustments */
  .hero-section {
    padding: 24px 16px 36px; /* スマホも上部余白を半分(48px→24px)に短縮 */
  }

  .hero-title {
    font-size: 1.9rem;   /* 少し小さくして余裕を確保 */
    margin-bottom: 16px;
  }

  .skew-block {
    padding: 5px 16px;   /* パディングも素素に */
    white-space: nowrap; /* スマホで絶対折り返さない */
  }

  .hero-desc {
    font-size: 0.95rem;
    margin-bottom: 24px;
  }

  /* ★ スマホ画面の垢抜け洗練デザイン化 */
  
  /* 1. ヘッダー：ロゴサイズを1.35remにコンパクト化（スマホでの主張を抑え品良く） */
  .header-inner {
    padding: 12px 18px;
    gap: 12px;
  }
  
  .logo-main {
    font-size: 1.35rem; /* スマホで存在感が大きすぎないコンパクトで上品なサイズへ */
  }

  /* ヒーローバッジ：スマホ画面での主張を抑え、上品でコンパクトに縮小 */
  .badge-skew {
    font-size: 0.78rem;
    letter-spacing: 1px;
    padding: 3px 10px;
    margin-bottom: 10px;
    border-left-width: 3px;
  }

  .hero-desc {
    font-size: 0.92rem;
    line-height: 1.7;
    margin-bottom: 22px;
    border-left: 3px solid var(--blue-primary);
    padding-left: 12px;
    background: rgba(0, 82, 204, 0.03);
  }

  /* 5. セクションタイトル：スマホ画面ではコンパクトに縮小して1行納まりを追求 */
  .section-title {
    font-size: 1.2rem;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 8px;
    flex-wrap: nowrap;
  }

  .num-badge {
    padding: 2px 8px 2px 6px;
    border-left-width: 3px;
    box-shadow: none;
  }

  .num-badge .en-num {
    font-size: 1.1rem; /* スマホ画面：小さくコンパクトに集約 */
  }

  .section-title small {
    display: inline-block !important; /* スマホでも1行の中に横並びで表示 */
    font-family: var(--font-display);
    font-size: 0.74rem;
    letter-spacing: 1px;
    color: var(--blue-primary);
    font-weight: 700;
    white-space: nowrap;
    opacity: 0.9;
  }

  /* スマホヒーロー背景：元のシンプルな背景に復元 */
  .hero-skew-bg {
    left: -5%;
    width: 110%;
    top: 0;
    bottom: 0;
    border-left: none;
    box-shadow: none;
    transform: skewY(-2deg);
  }

  /* 2. stat-cards: スマホ画面用3段コンパクト構造 (1行目:日本語名, 2行目:英字コード, 3行目:数値) */
  .hero-stats {
    gap: 6px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    margin-top: 16px;
    padding: 0;
  }

  .stat-card {
    background: #ffffff;
    border: 1.5px solid var(--ink-black);
    transform: skewX(var(--skew-angle)); /* スマホ時も斜め平行四辺形をON */
    padding: 8px 2px;
    box-shadow: 2.5px 2.5px 0px var(--blue-primary);
    text-align: center;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
  }

  .stat-card:active {
    transform: skewX(var(--skew-angle)) scale(0.96);
    box-shadow: 1px 1px 0px var(--blue-primary);
  }

  /* 文字・数値は100%直立化 */
  .stat-label, .stat-value {
    display: block;
    transform: skewX(calc(-1 * var(--skew-angle)));
  }

  .stat-label {
    font-size: 0.70rem;
    letter-spacing: 0;
    line-height: 1.2;
    font-weight: 700;
    white-space: nowrap;
  }

  .stat-sub {
    display: block !important; /* スマホでは独立した2行目としてコンパクト表示（横溢れを100%防止） */
    font-size: 0.58rem;
    letter-spacing: 0.5px;
    color: var(--blue-primary);
    font-weight: 700;
    margin-top: 1px;
    white-space: nowrap;
  }

/* Status Gauge UI (PC・スマホ共通の超コンパクト2段組み) */
.persona-status-panel {
  background: var(--bg-section-gray);
  padding: 16px 18px;
  border-left: 4px solid var(--blue-primary);
  margin-bottom: 24px;
}

.status-header {
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--blue-primary);
  margin-bottom: 14px;
}

.status-row {
  margin-bottom: 14px;
}

.st-info {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 3px;
}

.st-name {
  font-size: 0.9rem;
  color: var(--ink-gray);
  font-weight: 700;
}

.st-val {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--blue-primary);
  line-height: 1;
}

/* ==========================================
   GEAR VERIFICATION BAR (青いバー)
   ========================================== */
.st-bar {
  height: 100%;
  background: var(--blue-primary);
  transition: width 1s ease-out;
}
.st-bar-wrap {
  width: 100%;
  height: 8px;
  background: var(--bg-section-gray);
  border: 1px solid var(--ink-black);
  transform: skewX(-15deg);
}

/* ==========================================
   Responsive & Mobile Fixes
   ========================================== */
@media (max-width: 768px) {
  /* スマホ版ロゴの調整（1行収め、長い日本語は非表示） */
  .logo-main {
    white-space: nowrap !important;
  }
  .sub-jp {
    display: none !important;
  }
  .logo-sub {
    font-size: 0.75rem;
    letter-spacing: 1px;
  }
  .kanji-brush-text {
    font-size: 1.6rem !important;
  }
  
  /* スマホ版人気記事の2列化 (2x2 Grid) */
  .yb-popular-grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 10px !important;
  }

  /* スマホ版カードの見切れ防止（左右の余裕） */
  .card-grid {
    padding: 0 10px !important;
  }
  .yb-card {
    margin: 0 5px;
    width: auto !important;
  }

  /* ハンバーガーメニュー (トップページ用) */
  .nav-toggle {
    display: flex !important;
  }
  .main-nav {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100vh;
    background: rgba(255,255,255,0.98);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
  }
  .main-nav.open {
    opacity: 1;
    pointer-events: auto;
  }
  .main-nav ul {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }
  .main-nav a {
    font-size: 1.5rem;
    padding: 15px 30px;
  }

  /* 3. コマンド切替ボタン：スマホでも斜めバッジ化 */
  .command-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .cmd-buttons {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    flex-wrap: nowrap;
    padding: 4px 2px 8px 2px;
    gap: 10px;
  }

  .cmd-btn {
    transform: skewX(var(--skew-angle)); /* スマホ時もスタイリッシュな斜めボタンに */
    flex-shrink: 0;
    padding: 8px 16px;
    font-size: 0.88rem;
    border: 1.5px solid var(--ink-black);
  }

  .cmd-btn > * {
    display: inline-block;
    transform: skewX(calc(-1 * var(--skew-angle)));
  }

  .cmd-btn:hover,
  .cmd-btn.active {
    background: var(--blue-primary);
    color: #ffffff;
    border-color: var(--blue-primary);
    box-shadow: 3px 3px 0px var(--ink-black);
  }

  /* 4. 記事カード：スマホ用写真高180px最適化 ＋ 右端オーバーフロー防止 */
  .card-grid {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 0 4px 16px 4px;
    overflow: visible;
  }

  .card-image-wrap {
    height: 180px; /* スマホでの写真高さを180pxにし、野暮ったい縦長感をスッキリ解消 */
  }

  .yb-card {
    border-width: 2px;
  }

  .yb-card:active {
    transform: skewX(var(--skew-angle)) scale(0.98);
  }

} /* end @media (max-width: 768px) */

.gear-img-box {
  position: relative;
  box-shadow: 10px 10px 0px var(--blue-primary);
  border: 1px solid var(--ink-black);
}

.gear-img-box img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  display: block;
}

.stamp-badge {
  position: absolute;
  top: 20px;
  right: -10px;
  background: var(--blue-primary);
  color: #ffffff;
  font-family: var(--font-body);
  font-weight: 900;
  font-size: 1.05rem;
  padding: 4px 16px;
  transform: skewX(var(--skew-angle));
  box-shadow: 4px 4px 0 var(--ink-black);
}

.gear-category {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--blue-primary);
  letter-spacing: 2px;
}

.gear-name {
  font-size: 2.5rem;
  line-height: 1.1;
  margin-bottom: 12px;
  color: var(--ink-black);
}

.gear-desc {
  font-size: 0.95rem;
  color: var(--ink-gray);
  margin-bottom: 24px;
}

/* Status Gauge UI (1行目:項目名 / 2行目:ゲージバー ＋ 右横の数値) */
.persona-status-panel {
  background: var(--bg-section-gray);
  padding: 18px 20px;
  border-left: 4px solid var(--blue-primary);
  margin-bottom: 24px;
}

.status-header {
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--blue-primary);
  margin-bottom: 16px;
}

.status-row {
  margin-bottom: 14px;
}

.st-name {
  font-size: 0.9rem;
  color: var(--ink-gray);
  font-weight: 700;
  margin-bottom: 5px;
}

.st-gauge-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.st-bar-wrap {
  flex: 1;
  height: 12px;
  background: rgba(0, 0, 0, 0.08);
  transform: skewX(-15deg);
  overflow: hidden;
  position: relative;
}

.st-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--blue-primary) 0%, var(--cyan-bright) 100%);
  box-shadow: 0 0 10px rgba(0, 82, 204, 0.3);
  transition: width 1s cubic-bezier(0.25, 1, 0.5, 1);
}

.st-val {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--blue-primary);
  line-height: 1;
  min-width: 32px;
  text-align: right;
}

.st-name {
  font-size: 0.9rem;
  color: var(--ink-gray);
  font-weight: 700;
}

.st-bar-wrap {
  height: 12px;
  background: rgba(0, 0, 0, 0.08);
  transform: skewX(-15deg);
  overflow: hidden;
  position: relative;
}

.st-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--blue-primary) 0%, var(--cyan-bright) 100%);
  box-shadow: 0 0 10px rgba(0, 82, 204, 0.3);
  transition: width 1s cubic-bezier(0.25, 1, 0.5, 1);
}

.st-val {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--blue-primary);
  text-align: right;
  font-weight: 700;
}

.gear-verdict {
  display: flex;
  align-items: center;
  gap: 16px;
}

.verdict-tag {
  background: var(--ink-black);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 700;
  padding: 4px 12px;
}

.verdict-val {
  font-weight: 700;
  color: var(--blue-primary);
}

/* Footer */
.main-footer {
  position: relative;
  background: var(--ink-black);
  color: #ffffff;
  padding: 60px 24px 40px;
  margin-top: 100px;
  text-align: center;
}

.footer-brand h2 {
  font-size: 2.5rem;
  color: #ffffff;
  letter-spacing: 2px;
}

.footer-brand p {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--cyan-bright);
  letter-spacing: 2px;
  margin-bottom: 24px;
}

.copyright {
  font-size: 0.8rem;
  color: var(--ink-light-gray);
}