body {
  margin: 0;
  font-family: "Poppins", sans-serif;
  background: linear-gradient(rgba(9, 36, 79, 0.85), rgba(9, 36, 79, 0.85)),
    url("../assets/images/wrinkle.jpg") no-repeat center center fixed;
  background-size: cover;
  color: #09244f;
}

h1 {
  margin: 5rem 15rem 4rem 15rem;
  font-size: 2.5rem;
  text-align: center;
  color: #09244f;
  text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.2);
  background: #fbf5ac;
  padding: 40px 50px;
  border-radius: 20px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* .grade-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  max-width: 900px;
  margin: auto;
  padding: 2rem;
} */

.grade-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  max-width: 1000px;
  margin: auto;
  padding: 1rem;
  align-items: start;
}

.grade-box {
  align-self: start;
  background-color: #eef2c8;
  border-radius: 15px;
  overflow: hidden;
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
  transition: background-color 0.3s ease;
}

.grade {
  background-color: #6a9e8c;
  color: #fff;
  padding: 1.2rem;
  border: none;
  border-radius: 12px;
  font-size: 1.3rem;
  font-weight: 600;
  cursor: pointer;
  width: 100%;
  text-align: left;
  padding-left: 2rem;
  transition: background-color;
}

.grade:hover {
  background-color: #fbf5ac;
  color: #09244f;
}

details[open].grade-box {
  background-color: #fbf5ac;
}

.grade:hover {
  background-color: #fbf5ac;
  color: #09244f;
}

summary::-webkit-details-marker {
  display: none;
}

summary {
  list-style: none;
  font-size: 1.2rem;
  text-align: center;
}

.subjects {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  gap: 1rem;
  padding: 1.5rem 2rem;
  background-color: #fbf5ac;
}

.subject {
  background-color: #bcac85;
  color: #fff;
  padding: 0.8rem 1.2rem;
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  cursor: pointer;
  transition: 0.3s ease;
}

.subject:hover {
  background-color: #fbf5ac;
  color: #09244f;
}