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

body {
  font-family: "Hiragino Kaku Gothic ProN", sans-serif;
  color: #222;
  background: #fff;
  line-height: 1.6;
}

.container {
  max-width: 1000px;
  margin: auto;
  padding: 20px;
}

/* header */
header {
  background: #0a1a2f;
  color: #fff;
  padding: 15px 0;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

nav li {
  margin-left: 20px;
}

nav a {
  color: #fff;
  text-decoration: none;
  font-size: 14px;
}

/* hero */
.hero {
  background: #0a1a2f;
  color: #fff;
  padding: 120px 0;
  text-align: center;
}

/* section */
.section {
  padding: 80px 0;
}

.gray {
  background: #f5f5f5;
}

.section h2 {
  margin-bottom: 20px;
  border-bottom: 2px solid #0a1a2f;
  display: inline-block;
  padding-bottom: 5px;
}

.lead {
  font-size: 18px;
  line-height: 1.8;
}

/* grid */
.grid {
  display: flex;
  gap: 20px;
}

.card {
  background: #fff;
  padding: 30px;
  border: 1px solid #ddd;
  flex: 1;
}

/* stats */
.stats {
  background: #111;
  color: #fff;
  text-align: center;
}

.stats-grid {
  display: flex;
  justify-content: space-around;
}

.stats h3 {
  font-size: 36px;
}

/* table */
table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  border: 1px solid #ccc;
  padding: 10px;
  text-align: left;
}

th {
  width: 30%;
  background: #f0f0f0;
}

/* achievement */
.achievement {
  margin-bottom: 30px;
  padding: 20px;
  background: #fff;
  border-left: 5px solid #0a1a2f;
}

.achievement h3 {
  margin-bottom: 10px;
}

/* contact */
.mail {
  font-size: 18px;
  font-weight: bold;
}

/* footer */
footer {
  background: #0a1a2f;
  color: #fff;
  text-align: center;
  padding: 20px;
}


/* ===== スマホ最適化 ===== */
@media screen and (max-width: 768px) {

  body {
    font-size: 14px;
  }

  header {
    padding: 30px 10px;
    text-align: center;
  }

  header h1 {
    font-size: 22px;
    line-height: 1.4;
  }

  header p {
    font-size: 14px;
  }

  .container {
    width: 95%;
    padding: 15px;
  }

  h2 {
    font-size: 18px;
  }

  .info p {
    font-size: 14px;
  }

  footer {
    font-size: 12px;
    padding: 15px;
  }
}