/* ================================================
   ホリエモンAI学校 共通CSS
   ヘッダー・フッターのスタイル
   ================================================ */

:root {
  --ai-red: #e8001c;
  --ai-red-dark: #c0001a;
  --ai-black: #1a1a1a;
  --ai-header-height: 64px;
}

/* ヘッダーの高さ分だけ本文を下げる */
body { padding-top: var(--ai-header-height); }

/* ---- ヘッダー ---- */
.ai-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--ai-header-height);
  background: #fff;
  border-bottom: 2px solid var(--ai-red);
  z-index: 1000;
}

.ai-header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

/* ロゴ */
.ai-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}
.ai-logo-img { height: 36px; width: auto; display: block; }
.ai-logo-text {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 16px;
  font-weight: 900;
  color: var(--ai-black);
  white-space: nowrap;
}

/* ナビ */
.ai-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0; padding: 0;
}
.ai-nav ul li a {
  display: block;
  padding: 8px 16px;
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 14px;
  font-weight: 500;
  color: var(--ai-black);
  text-decoration: none;
  border-radius: 6px;
  transition: background 0.2s, color 0.2s;
}
.ai-nav ul li a:hover { background: #fff0f0; color: var(--ai-red); }

/* お問い合わせボタン */
.ai-nav-cta {
  background: var(--ai-red) !important;
  color: #fff !important;
  border-radius: 20px !important;
}
.ai-nav-cta:hover { background: var(--ai-red-dark) !important; color: #fff !important; }

/* ハンバーガー（スマホ） */
.ai-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.ai-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--ai-black);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}
.ai-menu-btn.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.ai-menu-btn.active span:nth-child(2) { opacity: 0; }
.ai-menu-btn.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---- フッター ---- */
.ai-footer {
  background: var(--ai-black);
  color: #fff;
  margin-top: 80px;
}

.ai-footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 48px 24px 24px;
}

.ai-footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 40px;
  flex-wrap: wrap;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}

.ai-footer-brand a {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  margin-bottom: 8px;
}
.ai-footer-brand .ai-logo-text { color: #fff; }

.ai-footer-tagline {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  margin-top: 4px;
}

.ai-footer-nav ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
  list-style: none;
  margin: 0; padding: 0;
}
.ai-footer-nav ul li a {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  transition: color 0.2s;
}
.ai-footer-nav ul li a:hover { color: #fff; }

.ai-footer-bottom {
  padding-top: 20px;
  text-align: center;
}
.ai-footer-bottom p { font-size: 12px; color: rgba(255,255,255,0.35); }

/* ---- レスポンシブ ---- */
@media (max-width: 768px) {
  .ai-menu-btn { display: flex; }

  .ai-nav {
    position: absolute;
    top: var(--ai-header-height);
    left: 0; right: 0;
    background: #fff;
    border-bottom: 1px solid #eee;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }
  .ai-nav.open { max-height: 300px; }

  .ai-nav ul { flex-direction: column; padding: 12px 24px; gap: 2px; align-items: flex-start; }
  .ai-nav ul li { width: 100%; }
  .ai-nav ul li a { padding: 12px 8px; font-size: 15px; }

  .ai-footer-top { flex-direction: column; }
  .ai-footer-nav ul { flex-direction: row; flex-wrap: wrap; gap: 8px 20px; }
}