@import url('https://fonts.googleapis.com/css2?family=Montserrat:ital,wght@0,100..900;1,100..900&family=Open+Sans:ital,wght@0,300..800;1,300..800&display=swap');

html {
  scroll-behavior: smooth;
}

.top {
  background-color: #1a1a1a;
  color: #ffffff;
  font-size: 14px;
  font-weight: 600;
  padding: 10px 0;
  letter-spacing: 1px;
}

body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-family: "Open Sans", sans-serif;
}

a,
a:hover,
a:active,
a:visited,
a:focus {
  text-decoration: none;
}

.link {
  cursor: pointer;
}

.esconder {
  display: none;
}

.banner {
  background: url(../images/top-image.png);
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
  min-height: 350px;
}

.banner p {
  color: #fff;
  font-size: 14px;
}

.banner h2 {
  font-weight: 500;
  font-size: 33px;
  color: #fff;
}

.banner h3 {
  font-size: 48px;
  font-weight: 700;
  color: #fff;
}

.content p {
  font-size: 18px;
  font-family: "Georgia", sans-serif;
  color: #000000;
}

.content h3 {
  font-size: 32px;
  font-weight: 700;
  color: #2c3e50;
  text-align: center;
  font-family: "Noto Sans JP", sans-serif;
}

.content h4 {
  font-size: 24px;
  font-weight: 600;
  color: #2c3e50;
  font-family: "Noto Sans JP", sans-serif;
}

.btn-buy {
  background-color: #0056b3;
  color: #fff;
  padding: 15px 30px;
  border-radius: 25px;
  text-decoration: none;
  display: inline-block;
  font-weight: 600;
  font-size: 16px;
  margin: 20px auto;
  transition: background-color 0.3s ease;
}

.btn-buy:hover {
  background-color: #003d80;
  color: white;
}

.scientific-studies {
  background-color: #f7f7f7;
}

.studies-title {
  font-weight: 700;
  font-size: 1.25rem;
  background: transparent;
  box-shadow: none;
}

.studies-title::after {
  display: none;
}

.studies-title .arrow {
  font-size: 0.9rem;
  transition: transform 0.3s ease;
}

.accordion-button:not(.collapsed) .arrow {
  transform: rotate(180deg);
}

.studies-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.studies-list li {
  position: relative;
  padding: 16px 40px 16px 20px;
  margin-bottom: 12px;
  background: #fff;
  font-weight: 600;
}

.studies-list li .bar {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: #3b6fd8;
  border-radius: 4px;
}

.studies-list li a {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  text-decoration: none;
  font-size: 1rem;
}

.accordion-item {
  background-color: #f7f7f7;
}

.accordion-button:not(.collapsed) {
  background-color: #f7f7f7;
}

.accordion-button:focus {
  z-index: 3;
  border-color: #86b7fe;
  outline: 0;
  box-shadow: none;
}

.accordion-button {
  justify-content: center;
}

.footer {
  background-color: #011433;
}

.footer h2 {
  font-size: 28px;
  font-family: "Advent Pro", sans-serif;
  text-align: center;
  color: #ffffff;
  margin-bottom: 5px;
}

.footer p {
  text-align: center;
  color: #ffffff;
  font-size: 14px;
}

.footer a {
  color: #fff;
  font-size: 16px;
  text-align: center;
  text-decoration: underline;
}

@media(max-width:821px) {
  .banner h3 {
    font-size: 32px;
  }

  .banner h2 {
    font-size: 28px;
  }
}