@charset "utf-8";
/* CSS Document */

/* ベーススタイル */
body {
  font-family: "Helvetica Neue", sans-serif;
  margin: 0;
  padding: 0;
  background: #f5f7fa;
  color: #333;
}
*{box-sizing: border-box;}
header {
  background: #222;
  color: #fff;
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

header h1 a {
  color: #fff;
  text-decoration: none;
}

nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 0;
  padding: 0;
}

nav ul li a {
  color: #fff;
  text-decoration: none;
  font-size: 0.9rem;
}

main {
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 1rem;
}

section {
  margin-bottom: 3rem;
}

.hero {
  text-align: center;
  background: linear-gradient(to bottom right, #1488CC, #2B32B2);
  color: #fff;
  padding: 3rem 1rem;
  border-radius: 10px;
}

.hero .btn-blue {
  background: #fff;
  color: #2B32B2;
  padding: 0.8rem 1.5rem;
  border-radius: 30px;
  font-weight: bold;
  text-decoration: none;
  display: inline-block;
  margin-top: 1rem;
  transition: background 0.3s;
  box-sizing: border-box;
}

.hero .btn-blue:hover {
  background: #e0e0e0;
}

.features ul {
  list-style: none;
  padding: 0;
}

.features ul li {
  margin: 0.5rem 0;
  padding-left: 1em;
  text-indent: -1em;
}

.cta {
  text-align: center;
  background: #fff3e0;
  padding: 2rem 1rem;
  border-radius: 10px;
}

.cta .btn-main {
  background: linear-gradient(to right, #ff8c00, #ffa726);
  color: #fff;
  padding: 0.8rem 1.5rem;
  border-radius: 30px;
  font-weight: bold;
  text-decoration: none;
  display: inline-block;
  margin-top: 1rem;
  transition: background 0.3s;
}

.cta .btn-main:hover {
  background: linear-gradient(to right, #ff7f00, #ff9800);
}

.note {
  font-size: 0.8rem;
  color: #666;
  margin-top: 1rem;
}

footer {
  background: #eee;
  text-align: center;
  padding: 1rem;
  font-size: 0.9rem;
}

footer a {
  color: #333;
  text-decoration: underline;
  margin: 0 0.5rem;
}

/* レスポンシブ対応 */
@media (max-width: 600px) {
  nav ul {
    flex-direction: column;
    gap: 0.5rem;
    align-items: flex-start;
  }

  .hero, .cta {
    padding: 2rem 1rem;
  }

  header {
    flex-direction: column;
    align-items: flex-start;
  }

  .btn-blue, .btn-main {
    width: 100%;
    text-align: center;
  }
}