/* static/css/mailsms/mail_knowhow.css */
html,
body {
  margin: 0;
  padding: 0;
  padding-top: 2rem;
  width: 100%;
  height: 100%;
  font-family: 'M PLUS 1p', sans-serif;
  overflow-x: hidden;
}

html {
  scroll-behavior: smooth;
}

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

p {
  text-align: left;
  margin: 0.5rem 0;
  line-height: 1.9;
}

strong {
  font-weight: 700;
}

.container {
  width: 100%;
  max-width: 70%;
  margin: 0 auto;
  padding-bottom: 3.5rem;
}

.knowhow-container {
  max-width: 70%;
}

.section-box {
  background-color: #f5f5f5;
  border: 0.3rem solid #ccc;
  border-radius: 1rem;
  padding: 1.2rem;
  margin-top: 1.5rem;
}

.h2 {
  font-size: 1.6rem;
  font-weight: 700;
  text-align: center;
  margin: 0 0 0.8rem 0;
}

.h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin: 0 0 1rem 0;
  text-align: left;
  color: #0052be;
}

.knowhow-lead {
  margin-bottom: 0;
}

.knowhow-subtitle {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 1.4rem 0 0.5rem 0;
  text-align: left;
}

.knowhow-case {
  background-color: #ffffff;
  border: 0.1rem solid #d9d9d9;
  border-radius: 0.7rem;
  padding: 1rem;
  margin-top: 1rem;
  box-shadow: 0 0.125rem 0.375rem rgba(0, 0, 0, 0.05);
}

.knowhow-case__title {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0 0 0.5rem 0;
  color: #0052be;
}

.knowhow-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  justify-content: center;
  margin-top: 1.5rem;
}

.knowhow-btn {
  display: inline-block;
  text-decoration: none;
  border-radius: 0.6rem;
  padding: 0.8rem 1.2rem;
  font-weight: 700;
  text-align: center;
  transition: opacity 0.2s ease;
}

.knowhow-btn:hover {
  opacity: 0.9;
}

.knowhow-btn--primary {
  background-color: #0052be;
  color: #ffffff;
}

.knowhow-btn--secondary {
  background-color: #ffffff;
  color: #0052be;
  border: 0.1rem solid #0052be;
}

@media (max-width: 768px) {
  .container,
  .knowhow-container {
    max-width: 90%;
  }

  .section-box {
    padding: 0.8rem;
  }

  .h2 {
    font-size: 1.35rem;
  }

  .h3 {
    font-size: 1.15rem;
  }

  .knowhow-subtitle {
    font-size: 1rem;
  }

  .knowhow-cta {
    flex-direction: column;
  }

  .knowhow-btn {
    width: 100%;
  }
}