/* 基本設定 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #ffffff;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ナビゲーション */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  transition: all 0.3s ease;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.nav-logo h2 {
  color: #2c3e50;
  font-weight: 700;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 30px;
}

.nav-link {
  text-decoration: none;
  color: #2c3e50;
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
}

.nav-link:hover {
  color: #3498db;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: #3498db;
  transition: width 0.3s ease;
}

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

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
}

.bar {
  width: 25px;
  height: 3px;
  background-color: #2c3e50;
  margin: 3px 0;
  transition: 0.3s;
}

/* ヒーローセクション */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  overflow: hidden;
}

.hero-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  opacity: 0;
  animation: fadeInUp 1s ease forwards 0.5s;
}

.hero-subtitle {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  opacity: 0;
  animation: fadeInUp 1s ease forwards 0.7s;
}

.hero-description {
  font-size: 1.1rem;
  margin-bottom: 2rem;
  opacity: 0;
  animation: fadeInUp 1s ease forwards 0.9s;
}

.hero-buttons {
  display: flex;
  gap: 20px;
  opacity: 0;
  animation: fadeInUp 1s ease forwards 1.1s;
}

.btn {
  padding: 12px 30px;
  text-decoration: none;
  border-radius: 50px;
  font-weight: 600;
  transition: all 0.3s ease;
  display: inline-block;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background-color: #3498db;
  color: white;
}

.btn-primary:hover {
  background-color: #2980b9;
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(52, 152, 219, 0.3);
}

.btn-secondary {
  background-color: transparent;
  color: white;
  border: 2px solid white;
}

.btn-secondary:hover {
  background-color: white;
  color: #667eea;
  transform: translateY(-2px);
}

.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.profile-image {
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(10px);
  border: 2px solid rgba(255, 255, 255, 0.2);
  opacity: 0;
  animation: fadeInUp 1s ease forwards 0.3s;
}

.profile-image i {
  color: rgba(255, 255, 255, 0.8);
}

/* セクション共通スタイル */
section {
  padding: 100px 0;
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 3rem;
  color: #2c3e50;
  position: relative;
}

.section-title::after {
  content: "";
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 3px;
  background-color: #3498db;
}

/* 自己紹介セクション */
.about {
  background-color: #f8f9fa;
}

.about-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.about-text h3 {
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  color: #2c3e50;
}

.about-text p {
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
  color: #555;
}

.about-highlights {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin-top: 3rem;
}

.highlight {
  background: white;
  padding: 30px 20px;
  border-radius: 15px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
}

.highlight:hover {
  transform: translateY(-5px);
}

.highlight i {
  font-size: 2.5rem;
  color: #3498db;
  margin-bottom: 1rem;
}

.highlight h4 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  color: #2c3e50;
}

.highlight p {
  color: #666;
  font-size: 0.9rem;
}

/* スキルセクション */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-top: 2rem;
}

.skill-category {
  background: white;
  padding: 30px;
  border-radius: 15px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
}

.skill-category:hover {
  transform: translateY(-5px);
}

.skill-category h3 {
  text-align: center;
  margin-bottom: 1.5rem;
  color: #2c3e50;
  font-size: 1.3rem;
}

.skill-items {
  display: grid;
  gap: 15px;
}

.skill-item {
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 10px;
  background: #f8f9fa;
  border-radius: 10px;
  transition: all 0.3s ease;
}

.skill-item:hover {
  background: #e9ecef;
  transform: translateX(5px);
}

.skill-item i {
  font-size: 1.5rem;
  color: #3498db;
  width: 30px;
}

.skill-item span {
  font-weight: 500;
  color: #2c3e50;
}

/* プロジェクトセクション */
.projects {
  background-color: #f8f9fa;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 2rem;
}

.project-card {
  background: white;
  border-radius: 15px;
  overflow: hidden;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
}

.project-card:hover {
  transform: translateY(-10px);
}

.project-image {
  height: 200px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.project-content {
  padding: 25px;
}

.project-content h3 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: #2c3e50;
}

.project-content p {
  color: #666;
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  background: #e3f2fd;
  color: #1976d2;
  padding: 5px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
}

/* お問い合わせセクション */
.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  margin-top: 2rem;
}

.contact-info h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: #2c3e50;
}

.contact-info p {
  color: #666;
  margin-bottom: 2rem;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-method {
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 15px;
  background: #f8f9fa;
  border-radius: 10px;
}

.contact-method i {
  font-size: 1.5rem;
  color: #3498db;
  width: 30px;
}

.contact-method h4 {
  margin-bottom: 5px;
  color: #2c3e50;
}

.contact-method a {
  color: #3498db;
  text-decoration: none;
}

.contact-method a:hover {
  text-decoration: underline;
}

.contact-form {
  background: white;
  padding: 30px;
  border-radius: 15px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

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

.form-group label {
  display: block;
  margin-bottom: 8px;
  color: #2c3e50;
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px;
  border: 2px solid #e9ecef;
  border-radius: 8px;
  font-size: 1rem;
  transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #3498db;
}

/* フッター */
.footer {
  background-color: #2c3e50;
  color: white;
  padding: 50px 0 20px;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
}

.footer-left h3 {
  margin-bottom: 10px;
}

.footer-left p {
  color: #bdc3c7;
}

.social-links {
  display: flex;
  gap: 20px;
}

.social-links a {
  color: white;
  font-size: 1.5rem;
  transition: color 0.3s ease;
}

.social-links a:hover {
  color: #3498db;
}

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid #34495e;
  color: #bdc3c7;
}

/* アニメーション */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* レスポンシブデザイン */
@media screen and (max-width: 768px) {
  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background-color: white;
    width: 100%;
    text-align: center;
    transition: 0.3s;
    box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
    padding: 20px 0;
  }

  .nav-menu.active {
    left: 0;
  }

  .hamburger {
    display: flex;
  }

  .hamburger.active .bar:nth-child(2) {
    opacity: 0;
  }

  .hamburger.active .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .hamburger.active .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 30px;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1.2rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
    gap: 15px;
  }

  .profile-image {
    width: 200px;
    height: 200px;
  }

  .about-highlights {
    grid-template-columns: 1fr;
  }

  .skills-grid {
    grid-template-columns: 1fr;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .contact-content {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .footer-content {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }

  .section-title {
    font-size: 2rem;
  }

  section {
    padding: 60px 0;
  }
}

@media screen and (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-description {
    font-size: 1rem;
  }

  .container {
    padding: 0 15px;
  }

  .nav-container {
    padding: 0 15px;
  }

  .profile-image {
    width: 150px;
    height: 150px;
  }

  .profile-image i {
    font-size: 4rem;
  }

  .section-title {
    font-size: 1.8rem;
  }
}