@charset "UTF-8";

/* ==================================================
   1. デザイントークン (CSS変数)
================================================== */
:root {
  --color-black: #000000;
  --color-dark: #111111;
  --color-gray-dark: #333333;
  --color-gray: #555555;
  --color-gray-light: #888888;
  --color-border: #eeeeee;
  --color-bg-light: #fcfcfc;
  --color-bg-sub: #f9f9f9;
  --color-white: #ffffff;

  --font-base: 'Noto Sans JP', sans-serif;
  --transition-fast: all 0.3s ease;
  --radius-sm: 4px;
  --radius-md: 6px;
}

/* ==================================================
   2. リセット & ベーススタイル
================================================== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-base);
  background-color: var(--color-white);
  color: var(--color-black);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

/* ==================================================
   3. 全ページ共通見出し (.page-header)
================================================== */
.page-header {
  background-color: var(--color-black);
  color: var(--color-white);
  padding: 120px 20px 60px;
  text-align: center;
}

.page-header-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.page-title {
  font-size: 4rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  margin: 0;
}

.page-subtitle {
  font-size: 0.9rem;
  color: #aaaaaa;
  margin-top: 10px;
  letter-spacing: 0.05em;
}

/* ==================================================
   4. ヘッダー & ナビゲーション (.site-header)
================================================== */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
}

.logo-box {
  font-size: 1.2rem;
  font-weight: 900;
  color: var(--color-black);
  letter-spacing: 0.05em;
}

.logo-link {
  text-decoration: none;
}

/* 🍔 スマホ用ハンバーガーボタン (PC時は非表示) */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.8rem;
  cursor: pointer;
  color: var(--color-black);
  padding: 0;
  line-height: 1;
}

.main-nav ul {
  display: flex;
  list-style: none;
  gap: 30px;
}

.main-nav a {
  text-decoration: none;
  color: var(--color-black);
  font-size: 0.9rem;
  font-weight: 700;
  transition: color 0.3s ease;
}

.main-nav a:hover,
.main-nav a.active {
  color: #666666;
}

/* ==================================================
   5. フッター (.site-footer)
================================================== */
.site-footer {
  background-color: var(--color-black);
  color: var(--color-white);
  padding: 80px 40px 40px;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 60px;
  margin-bottom: 60px;
}

.footer-logo {
  color: var(--color-white);
  font-size: 1.4rem;
}

.footer-tagline {
  font-size: 0.85rem;
  color: var(--color-gray-light);
  margin-top: 10px;
}

.footer-nav {
  display: flex;
  gap: 50px;
}

.footer-nav-group h4 {
  font-size: 0.85rem;
  color: var(--color-gray-light);
  margin-bottom: 15px;
  letter-spacing: 0.1em;
}

.footer-nav-group ul {
  list-style: none;
}

.footer-nav-group li {
  margin-bottom: 10px;
}

.footer-nav-group a {
  color: var(--color-white);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.3s ease;
}

.footer-nav-group a:hover {
  color: #aaaaaa;
}

.footer-bottom {
  border-top: 1px solid #222222;
  padding-top: 30px;
  text-align: center;
}

.copyright {
  font-size: 0.8rem;
  color: #666666;
}

/* ==================================================
   6. RESPONSIVE (ヘッダー・フッターのスマホ制御)
================================================== */
@media (max-width: 768px) {
  .page-header {
    padding: 90px 16px 40px;
  }

  .page-title {
    font-size: 1.9rem;
    letter-spacing: 0.04em;
    word-break: break-word;
  }

  .page-subtitle {
    font-size: 0.8rem;
  }

  .header-inner {
    padding: 12px 16px;
  }

  .logo-box {
    font-size: 1.05rem;
  }

  .menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    font-size: 1.6rem;
  }

  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
    display: none;
    padding: 8px 0 16px;
  }

  .main-nav.active {
    display: block;
  }

  .main-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .main-nav a {
    display: block;
    padding: 14px 20px;
    font-size: 0.95rem;
    text-align: center;
  }

  .site-footer {
    padding: 50px 20px 30px;
  }

  .footer-top {
    flex-direction: column;
    gap: 36px;
    margin-bottom: 40px;
  }

  .footer-nav {
    flex-direction: column;
    gap: 28px;
  }

  .footer-nav-group a {
    display: inline-block;
    padding: 4px 0;
  }
}