.hero {
  text-align: center;
  min-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
}

.hero h2 {
  font-size: 2.2rem;
  margin-bottom: 10px;
}

.hero-login-btn {
  display: inline-block;
  margin-top: 30px;
  padding: 14px 32px;
  background-color: #5865f2;
  color: white;
  border-radius: 10px;
  text-decoration: none;
  font-size: 18px;
}

.features {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 80px;
  gap: 24px;
}

.feature-card {
  background-color: rgba(255, 255, 255, 0.85);
  border-radius: 12px;
  padding: 24px 20px;
  width: 260px;
  text-align: center;
}

.dark-mode .feature-card {
  background-color: rgba(25, 25, 40, 0.8);
  color: #f3f3f3;
}

/* ==================================================
   ☕ 募金ボタン（トップページ）
================================================== */
.donate-btn {
  display: inline-block;
  margin-top: 30px;
  margin-left: 20px;
  padding: 14px 32px;
  background-color: #1e90ff;
  color: #fff;
  border-radius: 10px;
  text-decoration: none;
  font-size: 18px;
  transition: background 0.2s;
  font-weight: bold;
}

.donate-btn:hover {
  background-color: #0b78d1;
}

.center-section {
  text-align: center;
  padding: 80px 0;
}

.back-btn {
  display: inline-block;
  margin-top: 30px;
  background: #3498db;
  color: #fff;
  padding: 10px 20px;
  border-radius: 8px;
  text-decoration: none;
  transition: background 0.3s;
}

.back-btn:hover {
  background: #2d83c3;
}

/* ==================================================
   ⚖️ 法的ページ（利用規約・プライバシー）の共通フッター
================================================== */
footer {
  text-align: center;
  padding: 20px 0;
  font-size: 14px;
  color: #666;
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  font-size: 14px;
  background: transparent;
}

footer a {
  color: #1e90ff;
  text-decoration: none;
  margin: 0 5px;
  transition: color 0.2s;
}

footer a:hover {
  color: #0b78d1;
  text-decoration: underline;
}

/* === ダークモード対応 === */
body.dark-mode .footer {
  color: #aaa;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

body.dark-mode .footer a {
  color: #66b3ff;
}

body.dark-mode .footer a:hover {
  color: #99ccff;
}

/* ==================================================
   ❓ FAQページ専用スタイル
================================================== */
details {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 8px;
  padding: 10px 15px;
  margin: 10px 0;
  transition: 0.3s;
}

details:hover {
  background: rgba(0, 0, 0, 0.03);
}

summary {
  font-weight: bold;
  cursor: pointer;
  font-size: 1.05rem;
}

details p {
  margin-top: 8px;
  line-height: 1.7;
}

/* ==================================================
   🧭 サポートページ専用スタイル
================================================== */
.support-section {
  max-width: 800px;
  margin: 60px auto;
  line-height: 1.8;
  text-align: center;
}

.support-section a.button {
  display: inline-block;
  padding: 12px 24px;
  background: #1e90ff;
  color: #fff;
  border-radius: 8px;
  text-decoration: none;
  margin: 10px;
  transition: background 0.2s;
}

.support-section a.button:hover {
  background: #0b78d1;
}

/* ==================================================
   🔗 下部ナビゲーションリンク（情報ページ間）
================================================== */
.bottom-links {
  text-align: center;
  margin: 50px auto 30px auto;
}

.bottom-links a {
  display: inline-block;
  margin: 5px 10px;
  padding: 8px 16px;
  font-size: 0.95rem;
  color: #1e90ff;
  border: 1px solid #1e90ff;
  border-radius: 8px;
  text-decoration: none;
  transition: 0.2s;
}

.bottom-links a:hover {
  background-color: #1e90ff;
  color: white;
}

/* ダークモード対応 */
body.dark-mode .bottom-links a {
  color: #66b3ff;
  border-color: #66b3ff;
}

body.dark-mode .bottom-links a:hover {
  background-color: #66b3ff;
  color: #000;
}