/* ==========================================================================
   TOMOSPYRE Corporate Site — Custom Stylesheet
   Tailwindで表現できない、ブランド固有のスタイルを定義する
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. カスタムプロパティ（デザイントークン）
   -------------------------------------------------------------------------- */
:root {
  --color-navy:        #0F172A;
  --color-navy-700:    #1E293B;
  --color-navy-500:    #334155;
  --color-gold:        #B8963E;
  --color-gold-hover:  #C9A84C;
  --color-gold-light:  #E2C97A;
  --color-white:       #FFFFFF;
  --color-gray-50:     #F8FAFC;
  --color-gray-100:    #F1F5F9;
  --color-text:        #0F172A;
  --color-text-muted:  #64748B;

  --font-sans:   "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Hiragino Sans", sans-serif;
  --font-serif:  "Noto Serif JP", "Hiragino Mincho ProN", serif;

  --ease-out-expo:  cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out:    cubic-bezier(0.4, 0, 0.2, 1);
}

/* --------------------------------------------------------------------------
   2. ベースリセット & グローバル
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-sans);
  color: var(--color-navy);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* --------------------------------------------------------------------------
   3. サイトヘッダー — スクロール連動スタイル
   -------------------------------------------------------------------------- */
#site-header {
  background-color: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color 0.4s var(--ease-in-out),
              border-color 0.4s var(--ease-in-out),
              box-shadow 0.4s var(--ease-in-out);
}

#site-header.is-scrolled {
  background-color: var(--color-navy);
  border-bottom-color: rgba(255, 255, 255, 0.06);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

/* --------------------------------------------------------------------------
   4. ハンバーガーメニュー
   -------------------------------------------------------------------------- */
.hamburger-line {
  display: block;
  width: 24px;
  height: 1.5px;
  background-color: rgba(255, 255, 255, 0.85);
  border-radius: 2px;
  transition: transform 0.35s var(--ease-out-expo),
              opacity 0.25s ease,
              width 0.3s ease;
  transform-origin: center;
}

#menu-btn.is-open .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
#menu-btn.is-open .hamburger-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
#menu-btn.is-open .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* モバイルメニュー */
#mobile-menu {
  background-color: var(--color-navy-700);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s var(--ease-out-expo),
              opacity 0.3s ease;
  opacity: 0;
}

#mobile-menu.is-open {
  max-height: 480px;
  opacity: 1;
}

/* --------------------------------------------------------------------------
   5. ボタン — アクションカラー（ゴールド）
   CTAボタン専用。他の用途には使用しない。
   -------------------------------------------------------------------------- */
.btn-gold {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-gold);
  color: var(--color-white);
  font-family: var(--font-sans);
  letter-spacing: 0.12em;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: background-color 0.25s ease,
              box-shadow 0.25s ease,
              transform 0.2s ease;
}

.btn-gold::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0);
  transition: background 0.25s ease;
}

.btn-gold:hover {
  background-color: var(--color-gold-hover);
  box-shadow: 0 8px 24px rgba(184, 150, 62, 0.4);
  transform: translateY(-1px);
}

.btn-gold:hover::after {
  background: rgba(255, 255, 255, 0.06);
}

.btn-gold:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(184, 150, 62, 0.3);
}

/* アウトライン版 — ヘッダー外のセカンダリCTA用 */
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: rgba(255, 255, 255, 0.85);
  letter-spacing: 0.12em;
  font-weight: 500;
  transition: border-color 0.25s ease, color 0.25s ease, background-color 0.25s ease;
}

.btn-outline:hover {
  border-color: rgba(255, 255, 255, 0.8);
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.05);
}

/* --------------------------------------------------------------------------
   6. スクロールフェードイン アニメーション
   Intersection Observer と連動する
   -------------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.75s var(--ease-out-expo),
              transform 0.75s var(--ease-out-expo);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ディレイバリアント */
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* Heroセクション — ページロード時の即時アニメーション */
.hero-animate {
  opacity: 0;
  transform: translateY(20px);
  animation: heroFadeUp 0.9s var(--ease-out-expo) forwards;
}

.hero-animate-delay-1 { animation-delay: 0.15s; }
.hero-animate-delay-2 { animation-delay: 0.3s; }
.hero-animate-delay-3 { animation-delay: 0.45s; }
.hero-animate-delay-4 { animation-delay: 0.6s; }

@keyframes heroFadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --------------------------------------------------------------------------
   7. タイポグラフィ — セリフ体見出し
   -------------------------------------------------------------------------- */
.heading-serif {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0.02em;
}

.section-label {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--color-gold);
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  font-weight: 500;
  text-transform: uppercase;
}

.section-label::before {
  content: '';
  display: block;
  width: 2.5rem;
  height: 1px;
  background-color: var(--color-gold);
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   8. スクロールインジケーター
   -------------------------------------------------------------------------- */
.scroll-indicator {
  animation: scrollBounce 2.4s ease-in-out infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: translateY(0); opacity: 0.35; }
  50%       { transform: translateY(6px); opacity: 0.7; }
}

/* --------------------------------------------------------------------------
   9. クライアントロゴグリッド
   -------------------------------------------------------------------------- */
.client-logo-item {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 2.5rem;
  transition: opacity 0.3s ease;
}

.client-logo-item:hover {
  opacity: 1 !important;
}

.client-name-display {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  color: var(--color-navy);
  opacity: 0.25;
  transition: opacity 0.3s ease;
}

.client-logo-item:hover .client-name-display {
  opacity: 0.6;
}

/* --------------------------------------------------------------------------
   10. サービスカード
   -------------------------------------------------------------------------- */
.service-card {
  position: relative;
  overflow: hidden;
}

.service-card-number {
  position: absolute;
  top: -0.5rem;
  right: 1.5rem;
  font-size: 6rem;
  font-weight: 700;
  font-family: var(--font-sans);
  color: var(--color-navy);
  opacity: 0.04;
  line-height: 1;
  pointer-events: none;
  user-select: none;
}

/* --------------------------------------------------------------------------
   11. フッター
   -------------------------------------------------------------------------- */
.footer-link {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.875rem;
  transition: color 0.2s ease;
  letter-spacing: 0.03em;
}

.footer-link:hover {
  color: rgba(255, 255, 255, 0.9);
}

.license-badge {
  display: inline-block;
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 0.5rem 1rem;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.6);
  border-radius: 2px;
}

/* --------------------------------------------------------------------------
   12. ユーティリティ
   -------------------------------------------------------------------------- */

/* テキストバランス — 日本語見出しの折り返し最適化 */
.text-balance {
  text-wrap: balance;
}

/* フォーカスリング（アクセシビリティ） */
:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 3px;
}

/* スクロールバー（WebKit系） */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--color-gray-50); }
::-webkit-scrollbar-thumb { background-color: var(--color-navy-500); border-radius: 3px; }

/* セクション区切りの水平線 */
.section-divider {
  width: 3rem;
  height: 2px;
  background: linear-gradient(to right, var(--color-gold), transparent);
  margin: 1.5rem 0 2.5rem;
}

/* ナビリンクのアンダーライン効果 */
.nav-link-desktop {
  position: relative;
  padding-bottom: 2px;
}

.nav-link-desktop::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-gold);
  transition: width 0.3s var(--ease-out-expo);
}

.nav-link-desktop:hover::after,
.nav-link-desktop.is-active::after {
  width: 100%;
}

/* Tabular nums — 数字の桁揃え（disclosure.php） */
.tabular-nums {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum";
}

/* --------------------------------------------------------------------------
   13. レスポンシブ補正
   -------------------------------------------------------------------------- */
@media (max-width: 640px) {
  .service-card-number {
    font-size: 4.5rem;
    right: 1rem;
    top: -0.25rem;
  }

  .client-logo-item {
    padding: 1.25rem 1.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .reveal,
  .hero-animate,
  .btn-gold,
  .hamburger-line,
  #mobile-menu {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .hero-animate {
    opacity: 1;
    transform: none;
  }
}