/* Reset & Fondasi Utama */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: "Fredoka", sans-serif;
  background-color: #dcfce7; /* Nuansa
hijau pastel segar untuk Kelas 7 */
  background-image:
    radial-gradient(#bbf7d0 3px, transparent 3px),
    radial-gradient(#bbf7d0 3px, #dcfce7 3px);
  background-size: 36px 36px;
  background-position:
    0 0,
    18px 18px;
  color: #1e293b;
  min-height: 100vh;
  padding: 25px 20px 60px;
  display: flex;
  justify-content: center;
}
.page-container {
  max-width: 950px;
  width: 100%;
} /* Navigation Back
Button */
.nav-header {
  margin-bottom: 20px;
}
.btn-back {
  display: inline-block;
  background-color: #ffffff;
  color: #15803d;
  font-weight: 700;
  text-decoration: none;
  padding: 10px 22px;
  border-radius: 50px;
  box-shadow:
    0 5px 0px #bbf7d0,
    0 8px 15px rgba(0, 0, 0, 0.05);
  transition: all 0.2s ease;
  border: 3px solid #ffffff;
}
.btn-back:hover {
  transform: translateY(-3px);
  background-color: #15803d;
  color: #ffffff;
} /* Class Banner */
.class-banner {
  background-color: #ffffff;
  border-radius: 35px;
  padding: 30px 25px;
  text-align: center;
  box-shadow:
    0 10px 0px #a7f3d0,
    0 15px 25px rgba(0, 0, 0, 0.06);
  margin-bottom: 40px;
  border: 4px solid #ffffff;
}
.badge-class {
  background-color: #fef08a;
  color: #854d0e;
  font-size: 0.88rem;
  font-weight: 700;
  padding: 5px 16px;
  border-radius: 50px;
  display: inline-block;
  margin-bottom: 10px;
}
.class-banner h1 {
  font-size: 2.2rem;
  color: #166534;
  margin-bottom: 8px;
}
.class-banner p {
  color: #475569;
  font-size: 1.05rem;
} /* Chapter
Section */
.chapter-section {
  margin-bottom: 45px;
}
.chapter-title-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  padding: 10px 22px;
  border-radius: 50px;
  background-color: #ffffff;
  box-shadow: 0 6px 0px rgba(0, 0, 0, 0.06);
  margin-bottom: 22px;
  border: 3px solid #ffffff;
}
.chapter-title-badge span {
  background-color: #0f172a;
  color: #ffffff;
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 0.85rem;
}
.yellow-badge {
  color: #854d0e;
  background-color: #fef08a;
}
.blue-badge {
  color: #0369a1;
  background-color: #bae6fd;
} /* Grid Layout */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
} /* Materi Cards */
.materi-card {
  text-decoration: none;
  border-radius: 26px;
  padding: 22px 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border: 4px solid #ffffff;
  position: relative;
  transition:
    transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1),
    box-shadow 0.25s ease;
  box-shadow: 0 7px 0px rgba(0, 0, 0, 0.06);
}
.materi-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 15px 20px rgba(0, 0, 0, 0.1);
}
.materi-number {
  position: absolute;
  top: 15px;
  right: 18px;
  font-size: 1.1rem;
  font-weight: 700;
  opacity: 0.35;
}
.materi-content {
  margin-bottom: 18px;
}
.materi-icon {
  font-size: 2.2rem;
  display: inline-block;
  margin-bottom: 10px;
  background: rgba(255, 255, 255, 0.7);
  width: 55px;
  height: 55px;
  line-height: 55px;
  text-align: center;
  border-radius: 50%;
}
.materi-card h3 {
  font-size: 1.2rem;
  color: #0f172a;
  margin-bottom: 6px;
}
.materi-card p {
  font-size: 0.88rem;
  color: #475569;
  line-height: 1.35;
}
.btn-action {
  align-self: flex-start;
  background-color: #ffffff;
  color: #0f172a;
  font-weight: 700;
  font-size: 0.85rem;
  padding: 7px 16px;
  border-radius: 50px;
  box-shadow: 0 3px 0px rgba(0, 0, 0, 0.08);
}
.materi-card:hover .btn-action {
  background-color: #0f172a;
  color: #ffffff;
} /* Card Color Varieties */
.card-green {
  background-color: #bbf7d0;
}
.card-blue {
  background-color: #bae6fd;
}
.card-purple {
  background-color: #ddd6fe;
}
.card-orange {
  background-color: #fed7aa;
}
.card-yellow {
  background-color: #fef08a;
}
.card-pink {
  background-color: #fbcfe8;
} /* Special Exam Cards */
.card-exam-sts {
  background-color: #fef08a;
  border-style: dashed;
  border-color: #eab308;
}
.card-exam-sas {
  background-color: #fecdd3;
  border-style: dashed;
  border-color: #f43f5e;
}
.exam-tag {
  position: absolute;
  top: 15px;
  right: 15px;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  background-color: #ffffff;
}
.card-exam-sts .exam-tag {
  color: #854d0e;
}
.card-exam-sas .exam-tag {
  color: #9f1239;
}
.btn-exam {
  align-self: flex-start;
  background-color: rgba(255, 255, 255, 0.8);
  color: #64748b;
  font-weight: 700;
  font-size: 0.82rem;
  padding: 6px 14px;
  border-radius: 50px;
} /* Responsive View
*/
@media (max-width: 600px) {
  .class-banner h1 {
    font-size: 1.7rem;
  }
  .cards-grid {
    grid-template-columns: 1fr;
  }
}