/* ===================================
   リセット・基本設定
=================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  line-height: 1.8;
  color: #333;
  background-color: #fff;
}

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

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

/* ===================================
   共通コンポーネント
=================================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 80px 0;
}

.section-gray {
  background-color: #f8f9fa;
}

.section-title {
  font-size: 2rem;
  text-align: center;
  margin-bottom: 50px;
  position: relative;
  padding-bottom: 15px;
}

.section-title::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, #667eea, #764ba2);
  border-radius: 2px;
}

/* ボタン */
.btn {
  display: inline-block;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-primary {
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: #fff;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

.btn-full {
  width: 100%;
}

/* ===================================
   ヘッダー・ナビゲーション
=================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
  z-index: 1000;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 15px 20px;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, #667eea, #764ba2);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  gap: 30px;
}

.nav-menu a {
  font-weight: 500;
  color: #555;
  transition: color 0.3s ease;
  position: relative;
}

.nav-menu a::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #667eea, #764ba2);
  transition: width 0.3s ease;
}

.nav-menu a:hover {
  color: #667eea;
}

.nav-menu a:hover::after {
  width: 100%;
}

/* ===================================
   ヒーローセクション
=================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
  padding: 100px 20px;
}

.hero-content h1 {
  font-size: 3rem;
  margin-bottom: 20px;
  line-height: 1.4;
}

.hero-content p {
  font-size: 1.2rem;
  margin-bottom: 30px;
  opacity: 0.9;
}

.hero .btn-primary {
  background: #fff;
  color: #667eea;
}

.hero .btn-primary:hover {
  background: #f0f0f0;
}

/* ===================================
   About セクション
=================================== */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}

.about-image img {
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.about-text h3 {
  font-size: 1.5rem;
  margin-bottom: 20px;
  color: #333;
}

.about-text p {
  color: #666;
  margin-bottom: 15px;
}

.about-list {
  margin-top: 20px;
}

.about-list li {
  padding: 8px 0;
  padding-left: 25px;
  position: relative;
  color: #555;
}

.about-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: #667eea;
  font-weight: bold;
}

/* ===================================
   Services セクション
=================================== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.service-card {
  background: #fff;
  padding: 40px 25px;
  border-radius: 12px;
  text-align: center;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
}

.service-icon {
  font-size: 3rem;
  margin-bottom: 20px;
}

.service-card h3 {
  font-size: 1.2rem;
  margin-bottom: 15px;
  color: #333;
}

.service-card p {
  font-size: 0.95rem;
  color: #666;
  line-height: 1.7;
}

/* ===================================
   Portfolio セクション
=================================== */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.portfolio-card {
  background: #fff;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.portfolio-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
}

.portfolio-image {
  overflow: hidden;
}

.portfolio-image img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.portfolio-card:hover .portfolio-image img {
  transform: scale(1.05);
}

.portfolio-info {
  padding: 25px;
}

.portfolio-info h3 {
  font-size: 1.2rem;
  margin-bottom: 10px;
  color: #333;
}

.portfolio-info p {
  font-size: 0.95rem;
  color: #666;
  margin-bottom: 15px;
  line-height: 1.6;
}

.portfolio-tag {
  display: inline-block;
  padding: 5px 12px;
  background: #f0f0f0;
  color: #667eea;
  font-size: 0.8rem;
  border-radius: 20px;
  margin-right: 8px;
  margin-bottom: 5px;
}

/* ===================================
   Contact セクション
=================================== */
.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
}

.contact-info h3 {
  font-size: 1.5rem;
  margin-bottom: 15px;
  color: #333;
}

.contact-info > p {
  color: #666;
  margin-bottom: 30px;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #555;
}

.contact-icon {
  font-size: 1.2rem;
}

/* フォームスタイル */
.contact-form {
  background: #fff;
  padding: 35px;
  border-radius: 12px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: #333;
  font-size: 0.95rem;
}

.required {
  color: #e74c3c;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  font-size: 1rem;
  font-family: inherit;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  background: #fff;
  color: #333;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: #aaa;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.15);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-group select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
}

/* ===================================
   フッター
=================================== */
.footer {
  background: #1a1a2e;
  color: #fff;
  padding: 50px 0 20px;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding-bottom: 30px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand h3 {
  font-size: 1.5rem;
  margin-bottom: 10px;
  background: linear-gradient(135deg, #667eea, #764ba2);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-brand p {
  color: #888;
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  gap: 30px;
}

.footer-links a {
  color: #888;
  transition: color 0.3s ease;
}

.footer-links a:hover {
  color: #667eea;
}

.footer-bottom {
  text-align: center;
  padding-top: 20px;
}

.footer-bottom p {
  color: #666;
  font-size: 0.85rem;
}

/* ===================================
   レスポンシブ対応
=================================== */

/* タブレット（1024px以下） */
@media (max-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .portfolio-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* スマートフォン（768px以下） */
@media (max-width: 768px) {
  .section {
    padding: 60px 0;
  }

  .section-title {
    font-size: 1.6rem;
    margin-bottom: 40px;
  }

  /* ナビゲーション */
  .nav {
    flex-direction: column;
    gap: 15px;
  }

  .nav-menu {
    gap: 20px;
    flex-wrap: wrap;
    justify-content: center;
  }

  /* ヒーロー */
  .hero-content h1 {
    font-size: 2rem;
  }

  .hero-content p {
    font-size: 1rem;
  }

  /* About */
  .about-content {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .about-image {
    order: -1;
  }

  /* Services */
  .services-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .service-card {
    padding: 30px 20px;
  }

  /* Portfolio */
  .portfolio-grid {
    grid-template-columns: 1fr;
  }

  /* Contact */
  .contact-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .contact-form {
    padding: 25px 20px;
  }

  /* フッター */
  .footer-content {
    flex-direction: column;
    gap: 30px;
    text-align: center;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
  }
}

/* 小さいスマートフォン（480px以下） */
@media (max-width: 480px) {
  .hero-content h1 {
    font-size: 1.6rem;
  }

  .btn {
    padding: 12px 24px;
    font-size: 0.95rem;
  }

  .nav-menu {
    font-size: 0.9rem;
    gap: 15px;
  }

  .portfolio-info {
    padding: 20px;
  }

  .form-group input,
  .form-group select,
  .form-group textarea {
    padding: 12px 14px;
    font-size: 0.95rem;
  }
}