:root {
  --primary-color: #85d2e8;
  --dark-color: #333;
  --light-color: #f4f4f4;
  --white-color: #fff;
}

body {
  font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN",
    "Hiragino Sans", Meiryo, sans-serif;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  background: var(--light-color);
  color: var(--dark-color);
}

.container {
  max-width: 960px;
  margin: auto;
  overflow: hidden;
  padding: 0 2rem;
}

header {
  background: var(--primary-color);
  color: var(--dark-color);
  padding: 1.5rem 0;
  text-align: center;
  border-bottom: 5px solid var(--dark-color);
}

header h1 {
  margin: 0;
  font-size: 2.5rem;
  letter-spacing: 2px;
}

nav ul {
  padding: 0;
  list-style: none;
  margin-top: 1rem;
}

nav ul li {
  display: inline;
  margin-right: 25px;
}

nav a {
  color: var(--dark-color);
  text-decoration: none;
  font-weight: bold;
  transition: color 0.3s ease;
}

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

main {
  padding: 20px 0;
}

section {
  margin-bottom: 40px;
  background: var(--white-color);
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

h2 {
  color: var(--primary-color);
  border-bottom: 3px solid var(--primary-color);
  padding-bottom: 10px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
}

h2 i {
  margin-right: 15px;
}

#skills ul {
  list-style: none;
  padding: 0;
}

#skills li {
  background: var(--light-color);
  margin-bottom: 10px;
  padding: 15px;
  border-radius: 5px;
  display: flex;
  align-items: center;
  font-weight: bold;
}

#skills i {
  color: var(--primary-color);
  margin-right: 15px;
  font-size: 1.5rem;
}

#contact p {
  font-size: 1.1rem;
}

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

footer {
  text-align: center;
  padding: 20px;
  background: var(--dark-color);
  color: var(--white-color);
  margin-top: 40px;
}