body {
  margin: 0;
  font-family: 'Helvetica Neue', sans-serif;
  background: #f4f4f4;
  color: #00afcc;
}

.hero {
  background: linear-gradient(135deg, #00afcc, #01669a);
  color: white;
  text-align: center;
  padding: 100px 20px;
}

.tagline {
  font-size: 1.2rem;
  margin-top: 10px;
}

section {
  padding: 20px 20px;
  max-width: 800px;
  margin: auto;
}


section 
.discription,
.explanation  {
  font-size: 15pt;
  color: #000;
  font-family: serif, system-ui;
  margin: 10px 25px;
}

.projects .card {
  background: white;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  margin-bottom: 20px;
  padding: 20px;
  text-align: center;
}

.links ul {
  list-style: none;
  padding: 0;
  text-align: left;
}

.links a {
  margin: 0 10px;
  color: #007acc;
  text-decoration: none;
}

footer {
  text-align: center;
  padding: 20px;
  font-size: 0.9rem;
  background: #00afcc;
  color: #ffffff;
}


.gradient-card {
  display: block;
  padding: 20px;
  margin-bottom: 15px;
  border-radius: 12px;
  color: #333;
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.gradient-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.15);
}

.gradient-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.gradient-card h3 {
  margin: 0 0 10px;
  font-size: 1.3rem;
}

.gradient-card p {
  margin: 0;
  font-size: 0.95rem;
}


/* 各カードの背景グラデーション */
.card-1 {
  background: linear-gradient(135deg, rgba(250, 216, 131, 0.9), rgba(255, 136, 153, 0.9)); 
}
.card-2 {
  background: linear-gradient(135deg, rgba(119, 221, 119, 0.7), rgba(136, 17, 136, 0.5)); 
}
.card-3 {
  background: linear-gradient(135deg, rgba(103,119,204,0.6), rgba(119,187,221,0.7)); 
}
.card-4 {
  background: linear-gradient(135deg, rgba(85,221,238,0.9), rgba(119,187,221,0.9))
}
.card-5 {
  background: linear-gradient(135deg, rgba(0,175,204,0.9),rgba(0,175,204,0.2))
}
.card-6 {
  background: linear-gradient(135deg, rgba(0,175,204,0.9),rgba(227, 15, 37,0.3))
}
.card-7 {
  background: linear-gradient(135deg, rgba(0,175,204,0.9),rgba(122, 153, 207,0.3))
}
.card-8 {
  background: linear-gradient(135deg, rgba(0,175,204,0.7),rgba(246, 174, 84,0.3))
}
.card-9 {
  background: linear-gradient(135deg, rgba(0,175,204,0.7),rgba(246, 139, 31,0.3))
}
.card-10 {
  background: linear-gradient(135deg, rgba(0,175,204,0.7),rgba(248, 193, 18,0.3))
}
.card-11 {
  background: linear-gradient(135deg, rgba(0,175,204,0.7),rgba(12, 123, 187,0.3))
}