:root {
  --primary-color: #F89324;
  --text-color: #333;
  --bg-color: #fff;
  --dark-bg: #1e1e1e;
}

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

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

.container {
  width: 90%;
  max-width: 1000px;
  margin: auto;
  padding: 2rem 0;
}

header {
  background: var(--dark-bg);
  color: #fff;
  padding: 1rem 0;
}

header .logo {
  font-size: 1.8rem;
  font-weight: bold;
  color: var(--primary-color);
}

nav ul {
  display: flex;
  gap: 1rem;
  list-style: none;
}

nav a {
  color: #fff;
  text-decoration: none;
  transition: color 0.3s;
}

nav a:hover {
  color: var(--primary-color);
}

.hero {
  background: var(--primary-color);
  color: #fff;
  padding: 5rem 0;
  text-align: center;
}

.hero .btn {
  background: #fff;
  color: var(--primary-color);
  padding: 0.75rem 1.5rem;
  border-radius: 30px;
  display: inline-block;
  margin-top: 1rem;
  text-decoration: none;
  font-weight: bold;
  transition: background 0.3s;
}

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

.section {
  padding: 4rem 0;
}

h3 {
  font-size: 2rem;
  margin-bottom: 1rem;
  border-left: 5px solid var(--primary-color);
  padding-left: 1rem;
}

.work-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.work-grid a{
  text-decoration: none;
}

.work-card {
  background: #f9f9f9;
  padding: 1.5rem;
  border: 1px solid #ddd;
  border-radius: 10px;
  text-align: center;
  transition: transform 0.3s;
  text-decoration: none;
}

.work-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

footer {
  background: var(--dark-bg);
  color: #ccc;
  text-align: center;
  padding: 1rem 0;
  font-size: 0.9rem;
}

.page-header {
  background-color: #f4f4f4;
  padding: 3rem 0;
  text-align: center;
  border-top: 5px solid var(--primary-color);
}

.page-header h2 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.page-header .subtitle {
  color: #666;
  font-size: 1rem;
}

.subpage-content {
  padding-bottom: 4rem;
}

.subpage-content h3 {
  font-size: 1.8rem;
  margin-top: 2rem;
  color: var(--primary-color);
}

.subpage-content h4 {
  font-size: 1.2rem;
  margin-top: 1.5rem;
  color: var(--text-color);
}

.subpage-content p {
  margin: 1rem 0;
}

.subpage-content ul {
  padding-left: 1.5rem;
  margin: 1rem 0;
}

.subpage-content ul li {
  list-style: disc;
  margin-bottom: 0.5rem;
}

.subpage-content blockquote {
  margin: 2rem 0;
  padding: 1rem 1.5rem;
  background-color: #fff3e5;
  border-left: 5px solid var(--primary-color);
  font-style: italic;
  color: #555;
}

.breadcrumb {
  font-size: 0.9rem;
  margin-bottom: 2rem;
  color: #666;
}

.breadcrumb ul {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  gap: 0.5rem;
  padding-left: 0;
}

.breadcrumb li::after {
  content: ">";
  margin: 0 0.5rem;
  color: #aaa;
}

.breadcrumb li:last-child::after {
  content: "";
}

.breadcrumb a {
  text-decoration: none;
  color: var(--primary-color);
  transition: color 0.2s;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.timeline {
  border-left: 3px solid var(--primary-color);
  margin-left: 1rem;
  padding-left: 1.5rem;
  position: relative;
}

.timeline-item {
  position: relative;
  margin-bottom: 2rem;
}

.timeline-date {
  font-size: 0.95rem;
  font-weight: bold;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.timeline-content {
  background-color: #f9f9f9;
  padding: 1rem 1.2rem;
  border-left: 4px solid #ddd;
  border-radius: 4px;
  color: #333;
  line-height: 1.6;
}

.timeline-item::before {
  content: "";
  width: 10px;
  height: 10px;
  background: var(--primary-color);
  border-radius: 50%;
  position: absolute;
  left: -21px;
  top: 0.3rem;
}