/* ========================================
   IHリンクス 法人向け保育サービスLP
   グローバルスタイル
   ======================================== */

/* リセット */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: #1a202c;
  background-color: #ffffff;
}

/* タイポグラフィ */
h1 {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: #0f172a;
}

h2 {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 1.5rem;
  color: #0f172a;
}

h3 {
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 1rem;
  color: #1a202c;
}

p {
  margin-bottom: 1rem;
  color: #4a5568;
}

/* コンテナ */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1rem;
}

@media (min-width: 768px) {
  .container {
    padding: 0 2rem;
  }
}

/* ボタン */
button, .btn {
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 0.5rem;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-block;
  text-align: center;
}

.btn-primary {
  background-color: #2563eb;
  color: white;
}

.btn-primary:hover {
  background-color: #1d4ed8;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
  background-color: #f3f4f6;
  color: #1a202c;
  border: 2px solid #e5e7eb;
}

.btn-secondary:hover {
  background-color: #e5e7eb;
  transform: translateY(-2px);
}

.btn-outline {
  background-color: transparent;
  color: #2563eb;
  border: 2px solid #2563eb;
}

.btn-outline:hover {
  background-color: #eff6ff;
}

/* フォーム */
input[type="text"],
input[type="email"],
textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #e5e7eb;
  border-radius: 0.5rem;
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 1rem;
  transition: border-color 0.3s ease;
}

input[type="text"]:focus,
input[type="email"]:focus,
textarea:focus {
  outline: none;
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

input[type="checkbox"],
input[type="radio"] {
  margin-right: 0.5rem;
  cursor: pointer;
}

label {
  display: flex;
  align-items: flex-start;
  cursor: pointer;
  margin-bottom: 1rem;
}

label input {
  margin-top: 0.25rem;
  margin-right: 0.75rem;
  flex-shrink: 0;
}

/* ナビゲーション */
header {
  background-color: #ffffff;
  border-bottom: 1px solid #e5e7eb;
  position: sticky;
  top: 0;
  z-index: 100;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: #2563eb;
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: #4a5568;
  font-weight: 500;
  transition: color 0.3s ease;
}

.nav-links a:hover {
  color: #2563eb;
}

/* ヒーロー */
.hero {
  position: relative;
  height: 100vh;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  text-align: center;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.3);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
}

.hero h1 {
  color: white;
  font-size: 3rem;
  margin-bottom: 1.5rem;
}

.hero p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.25rem;
  margin-bottom: 2rem;
}

/* セクション */
section {
  padding: 4rem 0;
}

section.bg-light {
  background-color: #f9fafb;
}

section.bg-blue {
  background-color: #2563eb;
  color: white;
}

section.bg-blue h2,
section.bg-blue h3 {
  color: white;
}

section.bg-blue p {
  color: rgba(255, 255, 255, 0.9);
}

/* グリッド */
.grid {
  display: grid;
  gap: 2rem;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* カード */
.card {
  background: white;
  border: 1px solid #e5e7eb;
  border-radius: 0.75rem;
  padding: 2rem;
  transition: all 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  border-color: #2563eb;
}

.card-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.card h3 {
  margin-bottom: 0.5rem;
}

.card p {
  color: #6b7280;
  margin-bottom: 1.5rem;
}

/* セグメントカード */
.segment-card {
  position: relative;
  height: 300px;
  background-size: cover;
  background-position: center;
  border-radius: 0.75rem;
  overflow: hidden;
  cursor: pointer;
  transition: all 0.3s ease;
}

.segment-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.4);
  transition: background 0.3s ease;
}

.segment-card:hover::before {
  background: rgba(0, 0, 0, 0.5);
}

.segment-card-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 2rem;
  color: white;
  z-index: 2;
}

.segment-card-icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.segment-card h3 {
  color: white;
  margin-bottom: 0.5rem;
  font-size: 1.25rem;
}

.segment-card p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.9rem;
  margin: 0;
}

/* アコーディオン */
.accordion-item {
  border: 1px solid #e5e7eb;
  border-radius: 0.75rem;
  margin-bottom: 1rem;
  overflow: hidden;
}

.accordion-header {
  background-color: #f9fafb;
  padding: 1.5rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color 0.3s ease;
  border: none;
  width: 100%;
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
}

.accordion-header:hover {
  background-color: #f3f4f6;
}

.accordion-header.active {
  background-color: #2563eb;
  color: white;
}

.accordion-toggle {
  font-size: 1.5rem;
  transition: transform 0.3s ease;
}

.accordion-header.active .accordion-toggle {
  transform: rotate(180deg);
}

.accordion-content {
  display: none;
  padding: 2rem;
  background-color: white;
}

.accordion-content.active {
  display: block;
}

.accordion-content img {
  width: 100%;
  max-height: 400px;
  object-fit: cover;
  border-radius: 0.5rem;
  margin-bottom: 1.5rem;
}

/* フッター */
footer {
  background-color: #1a202c;
  color: #d1d5db;
  padding: 3rem 0 1rem;
  margin-top: 4rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h4 {
  color: white;
  margin-bottom: 1rem;
  font-size: 1rem;
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: 0.5rem;
}

.footer-section a {
  color: #d1d5db;
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-section a:hover {
  color: #2563eb;
}

.footer-bottom {
  border-top: 1px solid #374151;
  padding-top: 2rem;
  text-align: center;
  font-size: 0.875rem;
}

/* レスポンシブ */
@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  h3 {
    font-size: 1.25rem;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  section {
    padding: 2rem 0;
  }
  
  .nav-links {
    gap: 1rem;
    font-size: 0.875rem;
  }
}

/* ユーティリティ */
.text-center {
  text-align: center;
}

.text-white {
  color: white;
}

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.py-2 { padding: 1rem 0; }
.py-4 { padding: 2rem 0; }

.hidden {
  display: none;
}