/* ===== Sprout LP - Custom Styles ===== */

/* フォント */
body {
  font-family: 'Noto Sans JP', sans-serif;
  -webkit-font-smoothing: antialiased;
}


/* ===== ナビゲーション ===== */
#navbar {
  background: transparent;
}

#navbar.nav-scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 20px rgba(0, 0, 0, 0.06);
}

/* ===== ヒーローセクション ===== */
.hero-section {
  background-color: #f5f7f2;
}

.hero-bg {
  background:
    radial-gradient(ellipse at 80% 20%, rgba(58, 154, 58, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse at 20% 80%, rgba(113, 143, 82, 0.07) 0%, transparent 60%),
    radial-gradient(ellipse at 50% 50%, rgba(240, 249, 240, 0.8) 0%, transparent 80%);
  background-color: #f5f7f2;
}

.hero-overlay {
  background: linear-gradient(
    135deg,
    rgba(245, 247, 242, 0.2) 0%,
    rgba(240, 249, 240, 0.1) 100%
  );
}

/* ===== スクロールアニメーション ===== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* カードのアニメーション遅延 */
.feature-card:nth-child(1) { transition-delay: 0.05s; }
.feature-card:nth-child(2) { transition-delay: 0.10s; }
.feature-card:nth-child(3) { transition-delay: 0.15s; }
.feature-card:nth-child(4) { transition-delay: 0.20s; }
.feature-card:nth-child(5) { transition-delay: 0.25s; }
.feature-card:nth-child(6) { transition-delay: 0.30s; }

.teacher-card:nth-child(1) { transition-delay: 0.05s; }
.teacher-card:nth-child(2) { transition-delay: 0.12s; }
.teacher-card:nth-child(3) { transition-delay: 0.19s; }

.plan-card:nth-child(1) { transition-delay: 0.05s; }
.plan-card:nth-child(2) { transition-delay: 0.12s; }
.plan-card:nth-child(3) { transition-delay: 0.19s; }

.faq-item:nth-child(1) { transition-delay: 0.03s; }
.faq-item:nth-child(2) { transition-delay: 0.06s; }
.faq-item:nth-child(3) { transition-delay: 0.09s; }
.faq-item:nth-child(4) { transition-delay: 0.12s; }
.faq-item:nth-child(5) { transition-delay: 0.15s; }
.faq-item:nth-child(6) { transition-delay: 0.18s; }

/* ===== コンセプトビジュアル ===== */
.concept-visual {
  position: relative;
}

.concept-visual::before {
  content: '';
  position: absolute;
  inset: -4px;
  background: linear-gradient(135deg, #88ca88, #8fa870);
  border-radius: 28px;
  z-index: -1;
  opacity: 0.3;
}

/* ===== 特徴カード ===== */
.feature-card {
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #3a9a3a, #718f52);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.feature-card:hover::before {
  opacity: 1;
}

/* ===== 講師カード ===== */
.teacher-card {
  position: relative;
}

/* ===== プランカード ===== */
.plan-card {
  position: relative;
  transition: all 0.3s ease;
}

.plan-card:hover {
  transform: translateY(-4px);
}

/* ===== FAQアコーディオン ===== */
.faq-answer {
  animation: fadeDown 0.25s ease;
}

@keyframes fadeDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== ボタン共通 ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: #3a9a3a;
  color: white;
  font-weight: 500;
  padding: 14px 32px;
  border-radius: 9999px;
  transition: all 0.2s ease;
  box-shadow: 0 4px 14px rgba(58, 154, 58, 0.3);
}

.btn-primary:hover {
  background-color: #2d7d2d;
  box-shadow: 0 6px 20px rgba(58, 154, 58, 0.4);
  transform: translateY(-2px);
}

/* ===== グラデーションテキスト ===== */
.gradient-text {
  background: linear-gradient(135deg, #3a9a3a, #718f52);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== セクション共通 ===== */
section {
  scroll-margin-top: 72px;
}

/* ===== スクロールバーカスタマイズ ===== */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
  background: #b8e0b8;
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: #88ca88;
}

/* ===== アニメーション ===== */
@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

.float-animation {
  animation: float 4s ease-in-out infinite;
}

/* ===== レスポンシブ調整 ===== */
@media (max-width: 768px) {
  .hero-section {
    min-height: 100svh;
  }

  h1 {
    font-size: 2.25rem;
    line-height: 1.3;
  }
}

/* ===== 選択テキストカラー ===== */
::selection {
  background-color: #b8e0b8;
  color: #1e4e1e;
}

/* ===== フォーカスリング ===== */
a:focus-visible,
button:focus-visible {
  outline: 2px solid #3a9a3a;
  outline-offset: 3px;
  border-radius: 4px;
}

/* ===== ローディングアニメーション（スケルトン用） ===== */
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.skeleton {
  background: linear-gradient(
    90deg,
    #f0f0f0 25%,
    #e0e0e0 50%,
    #f0f0f0 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

/* ===== 診断セクション装飾 ===== */
#diagnosis {
  position: relative;
}

/* ===== タグホバー ===== */
#teachers span,
.sprout-tag {
  transition: all 0.2s ease;
}

#teachers span:hover,
.sprout-tag:hover {
  background-color: #dcf0dc;
  border-color: #88ca88;
}