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

body {
  font-family: 'Segoe UI', 'BIZ UDPGothic', 'Meiryo', sans-serif;
  background-color: #f0f4f8;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.header {
  background-color: #ffffff;
  border-bottom: 1px solid #e0e0e0;
  padding: 0;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
  height: 60px;
  position: relative;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
}

.header-title {
  display: flex;
  align-items: center;
  font-size: 20px;
  font-weight: 600;
  color: #333333;
}

.header-logout-button {
  position: absolute;
  right: 1rem;
}

.header-logo {
  width: 26px;
  height: 26px;
  margin-right: 20px;
  display: inline-block;
  position: relative;
}

.header-logo svg {
  width: 100%;
  height: 100%;
}

.main-container {
  flex: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 20px;
  width: 100%;
}

.intro-section {
  text-align: center;
  margin-bottom: 50px;
}

.intro-title {
  font-size: 22px;
  color: #666666;
  margin-bottom: 12px;
  line-height: 1.5;
}

.intro-subtitle {
  font-size: 26px;
  color: #333333;
  font-weight: 600;
  line-height: 1.4;
}

.highlight {
  color: #019e95;
}

.content-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  margin-top: 40px;
}

.content-card {
  background-color: #ffffff;
  border-radius: 8px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
  padding: 25px;
  min-height: 400px;
}

.card-header {
  display: flex;
  align-items: flex-start;
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid #e0e0e0;
}

.card-icon {
  width: 40px;
  height: 40px;
  background-color: #f0f4f8;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 15px;
  font-size: 20px;
  color: #666666;
}

.card-title {
  font-size: 18px;
  font-weight: 600;
  color: #333333;
  line-height: 1.4;
  text-align: center;
}

.sample-section {
  margin-bottom: 15px;
  padding-bottom: 15px;
  border-bottom: 1px solid #e0e0e0;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}

.sample-section:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.content-card:last-child .sample-section {
  border-bottom: none;
  padding-bottom: 0;
}

.sample-content {
  flex: 1;
  margin-right: 20px;
}

.sample-header {
  font-size: 15px;
  font-weight: 600;
  color: #333333;
  margin-bottom: 6px;
}

.sample-description {
  font-size: 13px;
  color: #666666;
  line-height: 1.5;
  margin-bottom: 10px;
}

.demo-button {
  background: #00468f;
  color: white;
  border: none;
  border-radius: 4px;
  padding: 10px 22px;
  font-size: 1rem;
  font-weight: 400;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-block;
  white-space: nowrap;
  align-self: center;
}

.demo-button:hover:not(:disabled) {
  background: #003670;
  box-shadow: 0 2px 8px rgba(0, 70, 143, 0.3);
}

.demo-button:disabled {
  background: #cccccc;
  cursor: not-allowed;
  opacity: 0.6;
}

.demo-button:active {
  transform: translateY(0);
}

.demo-button.bordered {
  background: transparent;
  color: #00468f;
  border: 1px solid #00468f;
}

.demo-button.bordered:hover:not(:disabled) {
  background: #00468f;
  color: white;
  box-shadow: 0 2px 8px rgba(0, 70, 143, 0.3);
}

.demo-button.bordered:disabled {
  background: transparent;
  color: #cccccc;
  border-color: #cccccc;
  cursor: not-allowed;
  opacity: 0.6;
}

.info-box {
  background-color: #f8f9fa;
  border-left: 3px solid #00468f;
  padding: 15px;
  margin-top: 20px;
  border-radius: 4px;
}

.info-list {
  list-style: none;
  font-size: 13px;
  color: #666666;
  line-height: 1.8;
}

.info-list li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 8px;
}

.info-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: #00468f;
}

.upload-note {
  font-size: 13px;
  color: #888888;
  line-height: 1.6;
  margin-top: 15px;
}

.divider {
  border-top: 1px solid #e0e0e0;
  margin: 20px 0;
}

@media (max-width: 768px) {
  .content-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .intro-title {
    font-size: 18px;
  }

  .intro-subtitle {
    font-size: 22px;
  }

  .content-card {
    padding: 20px;
  }
}