/* ベース設定 */
body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  color: #fff;
  background: linear-gradient(to right, #0f2027, #203a43, #2c5364);
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(0, 0, 0, 0.7);
  padding: 20px 40px;
  position: fixed;
  width: 100%;
  z-index: 1000;
}

.logo {
  font-size: 24px;
  font-weight: bold;
  color: #00ffd5;
}

nav ul {
  padding-right: 60px;
  list-style: none;
  display: flex;
  gap: 25px;
}

nav a {
  text-decoration: none;
  color: #fff;
  transition: color 0.3s;
}

nav a:hover {
  color: #00ffd5;
}

/* Hero セクション */
.hero {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: url('https://images.unsplash.com/photo-1600267166115-d6b1b1c8b4c3') no-repeat center center/cover;
  position: relative;
}

.hero::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: 3em;
  margin-bottom: 20px;
}

.hero p {
  font-size: 1.2em;
  margin-bottom: 30px;
}

.btn {
  display: inline-block;
  padding: 12px 24px;
  background: #00ffd5;
  color: #000;
  border-radius: 30px;
  text-decoration: none;
  transition: background 0.3s;
}

.btn:hover {
  background: #00bfa5;
}

/* セクション共通 */
.section {
  padding: 80px 20px;
  text-align: center;
}

.section h2 {
  font-size: 2em;
  margin-bottom: 30px;
}

.dark {
  background: rgba(0, 0, 0, 0.5);
}

.services-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 30px;
}

.service-card {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 20px;
  width: 280px;
  backdrop-filter: blur(10px);
  transition: transform 0.3s ease;
}

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

/* フッター */
footer {
  padding: 30px 20px;
  background: #000;
  text-align: center;
  font-size: 0.9em;
  color: #aaa;
}