/* リセット */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Helvetica Neue", Arial, sans-serif;
}

body {
  line-height: 1.6;
  color: #333;
}

/* 共通 */
.container {
  width: 90%;
  max-width: 1100px;
  margin: auto;
}

.section {
  padding: 80px 0;
}

.section h2 {
  margin-bottom: 30px;
  font-size: 28px;
  border-left: 4px solid #333;
  padding-left: 10px;
}

.gray {
  background: #f5f5f5;
}

/* ヘッダー */
header {
  background: #111;
  color: #fff;
  padding: 20px 0;
}

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

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

header li {
  margin-left: 20px;
}

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

header a:hover {
  opacity: 0.7;
}

/* ヒーロー */
.hero {
  height: 60vh;
  background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)),
              url("https://images.unsplash.com/photo-1503387762-592deb58ef4e");
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-text {
  color: #fff;
  text-align: center;
}

.hero-text h2 {
  font-size: 40px;
  margin-bottom: 10px;
}

/* カード */
.cards {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.card {
  background: #fff;
  padding: 20px;
  flex: 1;
  min-width: 250px;
  border-radius: 8px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
  transition: 0.3s;
}

.card:hover {
  transform: translateY(-5px);
}

/* ボタン */
.btn {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 25px;
  background: #111;
  color: #fff;
  text-decoration: none;
  border-radius: 4px;
}

.btn:hover {
  background: #444;
}

/* フッター */
footer {
  background: #111;
  color: #fff;
  text-align: center;
  padding: 20px 0;
}