/* ==== SECTION 1: GIỚI THIỆU ==== */

section.stem-intro {
  position: relative;
  min-height: 80vh;
  padding: 80px 0;
  display: flex;
  align-items: center;
  justify-content: center;

  /* background */
  background-image:
          linear-gradient(rgba(82,82,82,0.4), rgba(0,0,0,0.4)),
          url("../../images/about/bg-stem.jpg");
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
}



.stem-intro .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 50px;
  background: #fff;
  padding: 50px;
  border-radius: 40px;
  width: 800px;
  box-shadow: 0 10px 25px rgba(43,43,43,0.2);
}

/*====BACK====*/
.back {
    background-color: #f6f5f4;
    font-size: 13px;
    padding: 10px;
}
.back a,
.back span{
    text-decoration: none;
    color: #a1a0a0;
    margin-left: 20px;
}



.stem-intro__text h1 {
  font-size: 2.8rem;
  font-weight: 800;
  color: #222;
  margin-bottom: 20px;
}

.stem-intro__text p {
  font-size: 1rem;
  color: #555;
}

.stem-intro__image img {
  width: 350px;
  border-radius: 50%;
  box-shadow: 0 10px 30px rgba(0,0,0,0.25);
 
}


/* ==== SECTION 2A: THÀNH TỰU / COUNTER ==== */
.stem-achievements {
  padding: 100px 0;
  text-align: center;
  background: linear-gradient(120deg,#fff8f0,#fff);
}

.stem-achievements h2 {
  font-size: 2.2rem;
  margin-bottom: 15px;
}

.stem-achievements p {
  color: #555;
  margin-bottom: 50px;
}

.achievements-grid {
  display: flex;
  gap: 40px;
  justify-content: center;
  flex-wrap: wrap;
}

.achievement-item {
  flex: 1 1 180px;
  max-width: 220px;
  background: #f9f9ff;
  padding: 30px 20px;
  border-radius: 16px;
  box-shadow: 0 6px 15px rgba(0,0,0,0.05);
  transition: 0.3s;
}

.achievement-item:hover {
  transform: translateY(-8px);
  box-shadow: 0 10px 25px rgba(0,0,0,0.12);
}

.achievement-item h3 {
  font-size: 2rem;
  color: #ff4da6;
  margin-bottom: 10px;
}

.achievement-item p {
  font-size: 1rem;
  color: #555;
}
.achievement-item i {
    font-size: 2.5rem;
    color: #ff4da6;
    margin-bottom: 15px;
    display: block;
}

/* ==== SECTION 2B: 4 LĨNH VỰC ==== */
.stem-core {
  padding: 100px 0;
  background-color: #fff9f2;
  text-align: center;
}

.stem-core h2 {
  font-size: 2.2rem;
  margin-bottom: 50px;
}

.stem-core__grid {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
  justify-content: center;
}

.core-item {
  background: #f9f9ff;
  padding: 40px 25px;
  border-radius: 16px;
  box-shadow: 0 6px 15px rgba(0,0,0,0.05);
  transition: 0.3s;
  flex: 1 1 220px;
  max-width: 260px;
}

.core-item:hover {
  transform: translateY(-10px);
  box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.core-item i {
  font-size: 2.2rem;
  color: #ff4da6;
  margin-bottom: 15px;
}

.core-item h3 {
  font-size: 1.3rem;
  margin-bottom: 10px;
}

.core-item p {
  color: #555;
}

/* ==== SECTION 3: LỢI ÍCH ==== */
.stem-benefits {
  padding: 100px 0;
  background-color: #faf3f3;
}

.stem-benefits h2 {
  text-align: center;
  font-size: 2.2rem;
  margin-bottom: 40px;
}

.benefits-list {
  list-style: none;
  max-width: 800px;
  margin: 0 auto;
}

.benefits-list li {
  font-size: 1rem;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.benefits-list i {
  color: #ff4da6;
}

/* ==== SECTION 4: LỘ TRÌNH ==== */
.stem-levels {
  padding: 100px 0;
  background-color: #fff9f2;
  text-align: center;
}

.stem-levels h2 {
  font-size: 2.2rem;
  margin-bottom: 50px;
}

.levels-grid {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
  justify-content: center;
}

.level-card {
  background: #f9f9ff;
  padding: 40px 25px;
  border-radius: 16px;
  box-shadow: 0 6px 15px rgba(0,0,0,0.05);
  transition: 0.3s;
  flex: 1 1 220px;
  max-width: 300px;
}

.level-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 10px 25px rgba(0,0,0,0.12);
}

.level-card h3 {
  font-size: 1.4rem;
  margin-bottom: 12px;
}

.level-card p {
  color: #555;
  line-height: 1.7;
}

/* BUTTONS */
.btn-readmore-guide, .btn-primary {
  display: inline-block;
  font-weight: 600;
  border-radius: 30px;
  padding: 12px 28px;
  transition: 0.3s;
  text-decoration: none;
  color: #fff;
  background-color: #ff4da6;
  margin-top: 20px;
}

.btn-readmore-guide:hover, .btn-readmore:hover, .btn-primary:hover {
  background-color: #1c1c1c;
  transform: translateY(-3px);
}

.btn-readmore-guide i, .btn-readmore i {
  margin-left: 8px;
}


/* ==== SECTION 6: SẢN PHẨM ==== */
.stem-products {
  padding: 100px 0;
  text-align: center;
  background: linear-gradient(120deg,#fff,#fff8fb);
}

.stem-products h2 {
  font-size: 2.2rem;
  margin-bottom: 50px;
}

.product-grid {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
  justify-content: center;
}

.product-item {
  flex: 1 1 220px;
  max-width: 300px;
  background: #fff;
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 8px 20px rgba(0,0,0,0.08);
  transition: 0.3s;
}

.product-item:hover {
  transform: translateY(-10px);
  box-shadow: 0 12px 30px rgba(0,0,0,0.12);
}

.product-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.product-item h4 {
  margin: 15px 0 5px;
}

.product-item p {
  font-size: 0.95rem;
  color: #555;
  padding: 0 15px 20px;
}
.btn-readmore{
  display: inline-block;
  font-weight: 600;
  margin-top: 20px;
  border-radius: 30px;
  padding: 12px 28px;
  transition: 0.3s;
  text-decoration: none;
  color: #fff;
  background-color: #ff4da6;
}
/* ==== SECTION 7: CTA CUỐI ==== */
.stem-cta {
  padding: 100px 0;
  text-align: center;

}

.stem-cta h2 {
  font-size: 2.3rem;
  margin-bottom: 20px;
}

.stem-cta p {
  color: #555;
  font-size: 1rem;
  max-width: 700px;
  margin: 0 auto 30px;
}

/* ==== RESPONSIVE ==== */
@media (max-width: 900px) {
  .stem-intro .container {
    flex-direction: column;
    text-align: center;
  }
  .stem-intro__image { order: -1; margin-bottom: 20px; }
  .stem-intro__text h1 { font-size: 2rem; }
  .stem-core__grid, .levels-grid, .achievements-grid, .product-grid { gap: 25px; }
  .core-item, .level-card, .achievement-item, .product-item { max-width: 90%; }
}