/* ==========================================================================
   introduce.html Content Section (Figma Node 4:852)
   ========================================================================== */

.about-hvg-section {
  padding: 100px 0;
  background-color: #F6F6F9;
  width: 100%;
}

.about-hvg-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 60px;
}

/* ========================================
   CỘT TRÁI: COLLAGE HÌNH ẢNH
   ======================================== */
.about-hvg-visual {
  flex: 0 0 620px;
  height: 500px;
  position: relative;
}

/* Ảnh chính 1 (top-left) */
.about-img-primary {
  position: absolute;
  top: 15px;
  left: 0;
  width: 440px;
  height: 390px;
  border-radius: 20px;
  object-fit: cover;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

/* Ảnh phụ 2 (bottom-right) */
.about-img-secondary {
  position: absolute;
  top: 240px;
  left: 250px;
  width: 360px;
  height: 250px;
  border-radius: 20px;
  object-fit: cover;
  border: 8px solid var(--white, #ffffff); /* Viền trắng dày tạo ngăn cách đè lên ảnh 1 */
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

/* Thẻ chỉ số 10k+ (top-right) */
.about-card-badge {
  position: absolute;
  top: 15px;
  left: 450px;
  width: 170px;
  height: 250px;
  border-radius: 20px;
  background-image: url('../../assets/images/badge-bg.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  z-index: 2;
  color: var(--white, #ffffff);
}

.about-badge-value {
  font-family: var(--font-main), sans-serif;
  font-size: 38px;
  font-weight: 700;
  line-height: 1.1;
  margin: 0 0 8px 0;
}

.about-badge-plus {
  color: #3e55f8;
}

.about-badge-label {
  font-family: var(--font-main), sans-serif;
  font-size: 13px;
  font-weight: 500;
  line-height: 1.4;
  margin: 0;
  color: rgba(255, 255, 255, 0.9);
}

/* ========================================
   CỘT PHẢI: NỘI DUNG GIỚI THIỆU
   ======================================== */
.about-hvg-content {
  flex: 1;
  max-width: 600px;
  display: flex;
  flex-direction: column;
}

.about-tag {
  font-family: var(--font-main), sans-serif;
  font-size: 20px;
  font-weight: 500;
  color: var(--primary-color, #013475);
  margin-bottom: 12px;
}

.about-title {
  font-family: var(--font-main), sans-serif;
  font-size: 36px;
  font-weight: 700;
  color: #141414;
  margin: 0 0 24px 0;
  line-height: 1.3;
}

.about-desc {
  font-family: var(--font-main), sans-serif;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  color: rgba(50, 50, 50, 0.95);
  margin: 0 0 16px 0;
}

.about-desc:last-of-type {
  margin-bottom: 32px;
}

/* Lưới tính năng */
.about-features {
  display: flex;
  gap: 32px;
  margin-bottom: 40px;
}

.about-feature-item {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 16px;
}

.about-feature-icon {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-feature-icon svg {
  width: 100%;
  height: 100%;
}

.about-feature-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.about-feature-title {
  font-family: var(--font-main), sans-serif;
  font-size: 18px;
  font-weight: 600;
  color: rgba(20, 20, 20, 0.9);
  margin: 0;
}

.about-feature-subtitle {
  font-family: var(--font-main), sans-serif;
  font-size: 14px;
  font-weight: 400;
  color: #707070;
  margin: 0;
}

/* Nút bấm xem khóa học */
.btn-about-more {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 278px;
  height: 64px;
  background-color: #004092;
  color: var(--white, #ffffff);
  font-family: var(--font-main), sans-serif;
  font-size: 18px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 15px;
  gap: 12px;
  transition: background-color 0.3s ease, transform 0.25s ease;
}

.btn-about-more:hover {
  background-color: var(--primary-color, #013475);
  color: var(--white, #ffffff);
  transform: translateY(-2px);
}

.btn-about-more svg {
  transition: transform 0.3s ease;
}

.btn-about-more:hover svg {
  transform: translateX(4px);
}

/* ==========================================================================
   RESPONSIVE DESIGN
   ========================================================================== */

@media (max-width: 1199px) {
  .about-hvg-container {
    gap: 40px;
  }

  .about-hvg-visual {
    flex: 0 0 500px;
    height: 400px;
  }

  .about-img-primary {
    width: 350px;
    height: 310px;
  }

  .about-img-secondary {
    top: 180px;
    left: 200px;
    width: 280px;
    height: 200px;
  }

  .about-card-badge {
    left: 360px;
    width: 140px;
    height: 200px;
    padding: 16px;
  }

  .about-badge-value {
    font-size: 36px;
  }

  .about-badge-label {
    font-size: 13px;
  }
}

@media (max-width: 991px) {
  .about-hvg-section {
    padding: 20px 0;
  }

  .about-hvg-container {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 10px;
  }

  .about-hvg-content {
    max-width: 100%;
    align-items: center;
  }

  .about-hvg-visual {
    flex: none;
    width: 500px;
    height: 400px;
  }

  .about-features {
    width: 100%;
    max-width: 600px;
    justify-content: center;
  }

  .about-feature-item {
    text-align: left;
  }
}

@media (max-width: 767px) {
  .about-hvg-section {
    padding: 20px 0;
  }

  .about-hvg-visual {
    flex: none;
    width: 100%;
    max-width: 340px;
    height: 300px;
  }

  .about-img-primary {
    width: 240px;
    height: 210px;
  }

  .about-img-secondary {
    top: 120px;
    left: 120px;
    width: 200px;
    height: 150px;
    border-width: 4px;
  }

  .about-card-badge {
    left: 230px;
    width: 110px;
    height: 150px;
    padding: 12px;
  }

  .about-badge-value {
    font-size: 28px;
    margin-bottom: 6px;
  }

  .about-badge-label {
    font-size: 11px;
    line-height: 1.2;
  }

  .about-features {
    flex-direction: column;
    gap: 24px;
    align-items: center;
  }

  .about-title {
    font-size: 28px;
  }
}

/* ========================================
   RESPONSIVE - Mobile S (≤340px)
   ======================================== */
@media (max-width: 340px) {
  .about-hvg-visual {
    max-width: 280px !important;
    height: 250px !important;
  }

  .about-img-primary {
    width: 190px !important;
    height: 170px !important;
  }

  .about-img-secondary {
    top: 100px !important;
    left: 100px !important;
    width: 160px !important;
    height: 120px !important;
    border-width: 3px !important;
  }

  .about-card-badge {
    left: 185px !important;
    width: 95px !important;
    height: 120px !important;
    padding: 8px !important;
  }

  .about-badge-value {
    font-size: 20px !important;
    margin-bottom: 2px !important;
  }

  .about-badge-label {
    font-size: 9px !important;
    line-height: 1.1 !important;
  }
}

/* ==========================================================================