/* 基本設定 */
:root {
  --primary-color: #4a6d7c;
  --secondary-color: #d4a373;
  --accent-color: #e76f51;
  --dark-color: #333;
  --light-color: #f8f9fa;
  --text-color: #333;
  --border-radius: 5px;
  --box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans JP', sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--light-color);
}

a {
  text-decoration: none;
  color: var(--primary-color);
  transition: var(--transition);
}

a:hover {
  color: var(--accent-color);
}

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

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

.section-title {
  text-align: center;
  margin-bottom: 2rem;
  position: relative;
  font-size: 2rem;
  color: var(--primary-color);
}

.section-title::after {
  content: '';
  display: block;
  width: 50px;
  height: 3px;
  background-color: var(--secondary-color);
  margin: 10px auto;
}

.btn {
  display: inline-block;
  background-color: var(--primary-color);
  color: white;
  padding: 12px 25px;
  border-radius: var(--border-radius);
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-weight: bold;
  text-align: center;
}

.btn:hover {
  background-color: var(--accent-color);
  color: white;
  transform: translateY(-3px);
}

/* ヘッダー */
header {
  background-color: white;
  box-shadow: var(--box-shadow);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  padding: 15px 0;
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo h1 {
  font-size: 1.8rem;
  color: var(--primary-color);
  margin: 0;
}

.logo p {
  font-size: 0.9rem;
  color: var(--secondary-color);
}

nav ul {
  display: flex;
  list-style: none;
}

nav ul li {
  margin-left: 30px;
}

nav ul li a {
  color: var(--dark-color);
  font-weight: 500;
  position: relative;
}

nav ul li a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  background-color: var(--accent-color);
  bottom: -5px;
  left: 0;
  transition: var(--transition);
}

nav ul li a:hover::after {
  width: 100%;
}

.menu-toggle {
  display: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--primary-color);
}

/* ヒーローセクション */
.hero {
  background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('images/31967155_m.jpg');
  background-size: cover;
  background-position: center;
  height: 100vh;
  display: flex;
  align-items: center;
  text-align: center;
  color: white;
  margin-top: 70px;
}

.hero h2 {
  font-size: 3rem;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* 事業紹介セクション */
.about {
  padding: 5rem 0;
  background-color: white;
}

.about-content {
  display: flex;
  align-items: center;
  gap: 3rem;
}

.about-text {
  flex: 1;
}

.about-text p {
  margin-bottom: 1rem;
}

.about-image {
  flex: 1;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--box-shadow);
}

/* 実績紹介セクション */
.projects {
  padding: 5rem 0;
  background-color: #f9f9f9;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
}

.project-card {
  background-color: white;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--box-shadow);
  transition: var(--transition);
}

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

.project-image {
  overflow: hidden;
}

.project-image img {
  transition: var(--transition);
}

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

.project-info {
  padding: 1.5rem;
}

.project-info h3 {
  margin-bottom: 0.5rem;
  color: var(--primary-color);
}

/* 理念セクション */
.philosophy {
  padding: 5rem 0;
  background-color: white;
}

.philosophy-content {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
}

.philosophy-item {
  text-align: center;
  padding: 2rem;
  border-radius: var(--border-radius);
  background-color: #f9f9f9;
  transition: var(--transition);
}

.philosophy-item:hover {
  transform: translateY(-10px);
  box-shadow: var(--box-shadow);
}

.philosophy-item i {
  font-size: 3rem;
  color: var(--secondary-color);
  margin-bottom: 1rem;
}

.philosophy-item h3 {
  margin-bottom: 1rem;
  color: var(--primary-color);
}

/* お問い合わせセクション */
.contact {
  padding: 5rem 0;
  background-color: #f9f9f9;
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 3rem;
}

.contact-info h3 {
  margin-bottom: 1.5rem;
  color: var(--primary-color);
}

.contact-info p {
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
}

.contact-info p i {
  margin-right: 10px;
  color: var(--secondary-color);
}

.social-links {
  margin-top: 2rem;
}

.social-links a {
  display: inline-block;
  margin-right: 15px;
  font-size: 1.5rem;
  color: var(--primary-color);
}

.social-links a:hover {
  color: var(--accent-color);
}

.contact-form .form-group {
  margin-bottom: 1.5rem;
}

.contact-form label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: var(--border-radius);
  font-family: inherit;
  font-size: 1rem;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--primary-color);
}

/* フッター */
footer {
  background-color: var(--dark-color);
  color: white;
  padding: 2rem 0;
  text-align: center;
}

/* レスポンシブデザイン */
@media (max-width: 992px) {
  .about-content {
    flex-direction: column;
  }

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

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  nav {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 80%;
    height: calc(100vh - 70px);
    background-color: white;
    transition: var(--transition);
    box-shadow: var(--box-shadow);
    z-index: 999;
  }

  nav.active {
    left: 0;
  }

  nav ul {
    flex-direction: column;
    padding: 2rem;
  }

  nav ul li {
    margin: 1rem 0;
  }

  .hero h2 {
    font-size: 2.5rem;
  }

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

  .philosophy-content,
  .project-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 576px) {
  .hero h2 {
    font-size: 2rem;
  }

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

  .about,
  .projects,
  .philosophy,
  .contact {
    padding: 3rem 0;
  }
}