/* ========== リセット ========== */

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: #333;
  background-color: #f8f9fa;
  line-height: 1.6;
  padding-bottom: 48px;
}

a {
  text-decoration: none;
  color: inherit;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ========== パターンバナー ========== */

.pattern-banner {
  background-color: #1e293b;
  color: #fff;
  text-align: center;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
}

/* ========== ヘッダー ========== */

.header {
  background-color: #fff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.header-inner {
  max-width: 1120px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 16px;
  padding-right: 16px;
  padding-top: 16px;
  padding-bottom: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 20px;
  font-weight: 700;
  color: #2563eb;
}

.nav {
  display: flex;
  gap: 24px;
}

.nav-link {
  font-size: 14px;
  color: #333;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-link:hover {
  color: #2563eb;
}

/* ========== メイン ========== */

.main {
  max-width: 1120px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 16px;
  padding-right: 16px;
  padding-top: 40px;
  padding-bottom: 40px;
}

/* ========== カードリスト ========== */

.card-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 768px) {
  .card-list {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ========== カード ========== */

.card {
  background-color: #fff;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  transition: box-shadow 0.2s;
}

.card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.card-img {
  width: 100%;
  aspect-ratio: 600 / 338;
  object-fit: cover;
}

.card-body {
  padding: 20px;
}

.card-title {
  font-size: 18px;
  font-weight: 700;
  color: #333;
  margin-bottom: 8px;
}

.card-text {
  font-size: 14px;
  color: #666;
  margin-bottom: 16px;
  line-height: 1.7;
}

.card-btn {
  display: inline-block;
  background-color: #2563eb;
  color: #fff;
  padding: 10px 24px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  transition: background-color 0.2s;
}

.card-btn:hover {
  background-color: #1d4ed8;
}

@media (prefers-reduced-motion: no-preference) {
  .card-btn {
    animation: pulse 2s ease-in-out infinite;
  }

  @keyframes pulse {
    0%,
    100% {
      opacity: 1;
    }
    50% {
      opacity: 0.7;
    }
  }
}

/* ========== フッター ========== */

.footer {
  background-color: #1e293b;
  color: #fff;
}

.footer-inner {
  max-width: 1120px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 16px;
  padding-right: 16px;
  padding-top: 32px;
  padding-bottom: 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

@media (min-width: 768px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
  }
}

.copyright {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
}

.sns-links {
  display: flex;
  gap: 20px;
}

.sns-link {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  transition: color 0.2s;
}

.sns-link:hover {
  color: #fff;
}