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

body {
  font-family: 'Helvetica Neue', sans-serif;
  color: #333;
}

/* ヘッダー */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 40px;
  background: #000;
  color: #fff;
  position: fixed;
  width: 100%;
  top: 0;
}

.logo {
  font-size: 24px;
  font-weight: bold;
  letter-spacing: 3px;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 30px;
}

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

/* ヒーロー */
.hero {
  position: relative;
  height: 100vh;
  overflow: hidden;
}

.hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.4);
}

.hero-content {
  position: absolute;
  top: 50%;
  left: 80px;
  transform: translateY(-50%);
  color: #fff;
}

.hero-content h1 {
  font-size: 60px;
  line-height: 1.3;
  margin-bottom: 20px;
}

.hero-content p {
  font-size: 18px;
  margin-bottom: 40px;
  color: #aaa;
}


.btn {
  display: inline-block;
  background: #e74c3c;
  color: #fff;
  padding: 15px 40px;
  text-decoration: none;
  font-weight: bold;
  border-radius: 4px;
}

/* セクション共通 */
.section {
  padding: 80px 40px;
  text-align: center;
}

.section h2 {
  font-size: 36px;
  margin-bottom: 50px;
  letter-spacing: 3px;
}

/* グリッド */
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  max-width: 1000px;
  margin: 0 auto;
}

.card {
  background: #f5f5f5;
  padding: 40px 20px;
  border-radius: 8px;
}

.card h3 {
  font-size: 18px;
  margin-bottom: 15px;
}

/* フッター */
footer {
  background: #000;
  color: #fff;
  text-align: center;
  padding: 20px;
}