/* style/about.css */
/* body đã padding-top: var(--header-offset)；trang này không được viết lại biến đó */

:root {
  --page-about-primary-color: #2F6BFF;
  --page-about-secondary-color: #6FA3FF;
  --page-about-background-color: #F4F7FB;
  --page-about-card-bg: #FFFFFF;
  --page-about-text-main: #1F2D3D;
  --page-about-text-dark: #000000;
  --page-about-border-color: #D6E2FF;
  --page-about-glow-color: #A5C4FF;
  --page-about-btn-gradient: linear-gradient(180deg, #4A8BFF 0%, #2F6BFF 100%);
}

.page-about {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: var(--page-about-text-main); /* Mặc định cho nền sáng */
  background-color: var(--page-about-background-color);
}

.page-about__hero-section {
  position: relative;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 10px 20px 60px 20px; /* Padding-top nhỏ, không dùng --header-offset */
  background-color: var(--page-about-background-color);
  text-align: center;
}

.page-about__hero-image-wrapper {
  width: 100%;
  max-width: 100%;
  overflow: hidden;
  box-sizing: border-box;
}

.page-about__hero-image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.page-about__hero-content {
  max-width: 900px;
  margin-top: 30px;
  padding: 0 15px;
}

.page-about__main-title {
  font-size: clamp(2.2rem, 4vw, 3rem); /* Sử dụng clamp cho H1 */
  font-weight: 700;
  color: var(--page-about-text-dark);
  margin-bottom: 20px;
  line-height: 1.2;
}

.page-about__hero-description {
  font-size: 1.15rem;
  color: var(--page-about-text-main);
  margin-bottom: 30px;
}

.page-about__section {
  padding: 60px 20px;
  background-color: var(--page-about-card-bg);
  margin-bottom: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.page-about__section:last-of-type {
  margin-bottom: 0;
}

.page-about__container {
  max-width: 1200px;
  margin: 0 auto;
  box-sizing: border-box;
}

.page-about__section-title {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--page-about-text-dark);
  margin-bottom: 30px;
  text-align: center;
}

.page-about__text-block {
  font-size: 1.05rem;
  color: var(--page-about-text-main);
  margin-bottom: 20px;
  text-align: justify;
}

.page-about__highlight {
  color: var(--page-about-primary-color);
  font-weight: bold;
}

.page-about__image-content {
  width: 100%;
  height: auto;
  display: block;
  margin: 30px auto;
  border-radius: 8px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  object-fit: cover;
}

.page-about__dark-section {
  background: var(--page-about-primary-color);
  color: #ffffff;
}

.page-about__dark-section .page-about__section-title,
.page-about__dark-section .page-about__text-block {
  color: #ffffff;
}

.page-about__dark-section .page-about__highlight {
  color: var(--page-about-secondary-color);
}

.page-about__btn-primary,
.page-about__btn-secondary {
  display: inline-block;
  padding: 14px 30px;
  border-radius: 50px;
  font-size: 1.1rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  text-align: center;
  max-width: 100%;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-about__btn-primary {
  background: var(--page-about-btn-gradient);
  color: #ffffff;
  border: 2px solid transparent;
  box-shadow: 0 5px 15px rgba(47, 107, 255, 0.4);
}

.page-about__btn-primary:hover {
  background: linear-gradient(180deg, #2F6BFF 0%, #4A8BFF 100%);
  box-shadow: 0 8px 20px rgba(47, 107, 255, 0.6);
  transform: translateY(-2px);
}

.page-about__btn-secondary {
  background: var(--page-about-card-bg);
  color: var(--page-about-primary-color);
  border: 2px solid var(--page-about-primary-color);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.page-about__btn-secondary:hover {
  background: var(--page-about-primary-color);
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(47, 107, 255, 0.3);
  transform: translateY(-2px);
}

.page-about__cta-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  margin-top: 40px;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .page-about__main-title {
    font-size: clamp(2rem, 5vw, 2.8rem);
  }
  .page-about__section-title {
    font-size: 2rem;
  }
}

@media (max-width: 768px) {
  .page-about {
    font-size: 16px;
    line-height: 1.65;
  }
  .page-about__hero-section {
    padding: 10px 15px 40px 15px;
  }
  .page-about__section {
    padding: 40px 15px;
  }
  .page-about__main-title {
    font-size: clamp(1.8rem, 6vw, 2.5rem);
  }
  .page-about__hero-description {
    font-size: 1rem;
  }
  .page-about__section-title {
    font-size: 1.8rem;
  }
  .page-about__text-block {
    font-size: 0.95rem;
  }

  /* Hình ảnh responsive */
  .page-about img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    display: block !important;
  }
  .page-about__hero-image-wrapper,
  .page-about__section,
  .page-about__container,
  .page-about__cta-buttons {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
    overflow: hidden !important;
  }

  /* Nút responsive */
  .page-about__btn-primary,
  .page-about__btn-secondary {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
    padding-left: 15px;
    padding-right: 15px;
  }
  .page-about__cta-buttons {
    flex-direction: column;
    gap: 15px;
  }
}

@media (max-width: 480px) {
  .page-about__main-title {
    font-size: clamp(1.6rem, 7vw, 2.2rem);
  }
  .page-about__section-title {
    font-size: 1.6rem;
  }
  .page-about__hero-description {
    font-size: 0.9rem;
  }
  .page-about__btn-primary,
  .page-about__btn-secondary {
    padding: 12px 20px;
    font-size: 1rem;
  }
}