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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  line-height: 1.6;
  color: #333;
  background: #fafafa;
}

.container {
  width: 100%;
  max-width: 100%;
  margin: 0 auto;
  padding: 2rem 4rem;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  border-bottom: 1px solid #eee;
  margin-bottom: 2rem;
}

.logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.header-logo {
  height: 36px;
  width: auto;
  margin-right: 0.75rem;
}

header h1 {
  font-size: 1.25rem;
  font-weight: 600;
  color: #222;
  margin: 0;
  white-space: nowrap;
}

header p {
  display: none;
}

nav {
  margin: 0;
}

.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: #333;
  margin: 5px 0;
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-links {
  display: flex;
  justify-content: center;
  gap: 0;
}

nav a {
  color: #555;
  text-decoration: none;
  margin: 0 1rem;
  font-size: 0.95rem;
}

nav a:hover {
  color: #000;
  text-decoration: underline;
}

main {
  min-height: 50vh;
}

main h1 {
  font-size: 1.75rem;
  margin-bottom: 1.5rem;
  color: #222;
}

main h2 {
  font-size: 1.25rem;
  margin: 2rem 0 1rem;
  color: #333;
}

main p {
  margin-bottom: 1rem;
  color: #444;
}

main ul {
  margin: 1rem 0 1rem 1.5rem;
  color: #444;
}

main li {
  margin-bottom: 0.5rem;
}

.update-date {
  color: #888;
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

.contact-section {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid #eee;
}

.contact-section h2 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  color: #222;
}

.contact-section > p {
  color: #666;
  margin-bottom: 1.5rem;
}

.contact-form {
  max-width: 600px;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: #333;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 1rem;
  font-family: inherit;
  background: #fff;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #666;
}

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

.submit-btn {
  background: #333;
  color: #fff;
  border: none;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.2s;
}

.submit-btn:hover {
  background: #555;
}

.success-message {
  display: none;
  background: #e8f5e9;
  border: 1px solid #c8e6c9;
  border-radius: 4px;
  padding: 1.5rem;
  text-align: center;
}

.success-message p {
  color: #2e7d32;
  margin: 0;
  font-weight: 500;
}

footer {
  text-align: center;
  padding: 2rem 0;
  margin-top: 3rem;
  border-top: 1px solid #eee;
  color: #888;
  font-size: 0.9rem;
}

footer p {
  margin-bottom: 0.5rem;
}

footer a {
  color: #666;
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

@media (max-width: 600px) {
  .container {
    padding: 1rem 1rem;
  }

  header {
    padding: 0.75rem 0;
  }

  header h1 {
    font-size: 1.1rem;
  }

  header {
    flex-wrap: wrap;
  }

  .hamburger {
    display: block;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    width: 100%;
    margin-top: 0.75rem;
  }

  .nav-links.open {
    display: flex;
  }

  nav a {
    display: block;
    margin: 0;
    padding: 0.75rem 0;
    border-top: 1px solid #eee;
    font-size: 1rem;
    text-align: center;
  }

  nav a:first-child {
    border-top: none;
  }
}