body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #fff7d6;
  color: #1f2937;
}

a {
  color: inherit;
}

.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 18px;
}

.site-header {
  text-align: center;
  padding: 22px 0 16px;
}

.logo {
  font-size: 30px;
  font-weight: 900;
  margin: 0;
}

.catch {
  font-size: 14px;
  color: #666;
  line-height: 1.7;
  margin-top: 8px;
}

.card {
  background: #ffffff;
  border-radius: 22px;
  padding: 22px 18px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.12);
  margin-bottom: 18px;
}

.section-title {
  font-size: 17px;
  font-weight: 900;
  margin: 0 0 14px;
  padding-left: 10px;
  border-left: 5px solid #f2a900;
}

.tool-list {
  display: grid;
  gap: 12px;
}

.tool-card {
  display: block;
  text-decoration: none;
  background: #fffdf5;
  border: 2px solid #f2d78a;
  border-radius: 16px;
  padding: 16px;
  transition: 0.15s;
}

.tool-card:hover {
  background: #fff3bf;
  transform: translateY(-2px);
}

.tool-title {
  font-size: 18px;
  font-weight: 900;
  color: #f2a900;
  margin-bottom: 6px;
}

.tool-desc {
  font-size: 14px;
  color: #555;
  line-height: 1.7;
}

.button {
  display: inline-block;
  text-decoration: none;
  background: #f2a900;
  color: #ffffff;
  font-weight: 900;
  border-radius: 999px;
  padding: 12px 18px;
  margin-top: 10px;
}

.link-list {
  padding-left: 18px;
  line-height: 2;
}

.note {
  font-size: 12px;
  color: #777;
  line-height: 1.7;
}

.footer {
  text-align: center;
  font-size: 12px;
  color: #777;
  padding: 20px 0 10px;
}

.char-count {
  margin-top: 10px;
  font-size: 13px;
  font-weight: 900;
  color: #777;
  line-height: 1.6;
}

.char-count.ok {
  color: #15803d;
}

.char-count.error {
  color: #dc2626;
}

@media (max-width: 480px) {
  .container {
    padding: 12px;
  }

  .logo {
    font-size: 25px;
  }

  .card {
    padding: 20px 14px;
  }
}