/* style/about.css */

/* Biến CSS */
:root {
  --page-about-primary-color: #017439;
  --page-about-secondary-color: #FFFFFF;
  --page-about-text-dark: #333333;
  --page-about-text-light: #FFFFFF;
  --page-about-button-register-bg: #C30808;
  --page-about-button-login-bg: #C30808;
  --page-about-button-text-color: #FFFF00;
  --page-about-bg-light: #FFFFFF;
}

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

/* Hero Section */
.page-about__hero-section {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 20px;
  min-height: 500px;
  overflow: hidden;
  color: var(--page-about-text-light);
  background-color: var(--page-about-primary-color);
}

.page-about__hero-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
  opacity: 0.3;
}

.page-about__hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
}

.page-about__hero-title {
  font-size: 3.5em;
  margin-bottom: 20px;
  color: var(--page-about-text-light);
}

.page-about__hero-description {
  font-size: 1.2em;
  margin-bottom: 40px;
  color: var(--page-about-text-light);
}

.page-about__hero-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
}

/* General Section Styles */
.page-about__mission-vision,
.page-about__values,
.page-about__advantages,
.page-about__testimonials,
.page-about__faq-section,
.page-about__cta-section {
  padding: 60px 20px;
}

.page-about__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

.page-about__heading {
  font-size: 2.5em;
  text-align: center;
  margin-bottom: 40px;
  color: var(--page-about-primary-color);
}

.page-about__intro {
  font-size: 1.1em;
  text-align: center;
  max-width: 800px;
  margin: 0 auto 50px auto;
  color: var(--page-about-text-dark);
}

/* Background Colors */
.page-about__dark-section {
  background-color: var(--page-about-primary-color);
  color: var(--page-about-text-light);
}

.page-about__dark-section .page-about__heading,
.page-about__dark-section .page-about__intro,
.page-about__dark-section .page-about__card-title,
.page-about__dark-section .page-about__value-title,
.page-about__dark-section .page-about__advantage-title {
  color: var(--page-about-text-light);
}

.page-about__light-bg {
  background-color: var(--page-about-bg-light);
  color: var(--page-about-text-dark);
}

/* Buttons */
.page-about__btn-primary,
.page-about__btn-secondary {
  display: inline-block;
  padding: 15px 30px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  font-size: 1.1em;
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
  box-sizing: border-box;
  text-align: center;
}

.page-about__btn-primary {
  background-color: var(--page-about-button-register-bg);
  color: var(--page-about-button-text-color);
  border: 2px solid var(--page-about-button-register-bg);
}

.page-about__btn-primary:hover {
  background-color: darken(var(--page-about-button-register-bg), 10%);
  border-color: darken(var(--page-about-button-register-bg), 10%);
}

.page-about__btn-secondary {
  background-color: var(--page-about-secondary-color);
  color: var(--page-about-primary-color);
  border: 2px solid var(--page-about-primary-color);
}

.page-about__btn-secondary:hover {
  background-color: var(--page-about-primary-color);
  color: var(--page-about-secondary-color);
}

/* Grid Layouts */
.page-about__grid-2-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

.page-about__grid-3-col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

/* Cards */
.page-about__card {
  background-color: var(--page-about-secondary-color);
  border-radius: 10px;
  padding: 30px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  text-align: center;
  color: var(--page-about-text-dark);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.page-about__card-title {
  font-size: 1.8em;
  margin-bottom: 15px;
  color: var(--page-about-primary-color);
}

.page-about__card p {
  font-size: 1em;
  line-height: 1.6;
}

.page-about__card-image {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin-top: 20px;
}

/* Value Items */
.page-about__value-item {
  background-color: var(--page-about-secondary-color);
  border-radius: 10px;
  padding: 30px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  text-align: center;
  color: var(--page-about-text-dark);
}

.page-about__dark-section .page-about__value-item {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--page-about-text-light);
}

.page-about__dark-section .page-about__value-item .page-about__value-title {
    color: var(--page-about-text-light);
}

.page-about__value-icon {
  max-width: 100px;
  height: auto;
  margin-bottom: 20px;
}

.page-about__value-title {
  font-size: 1.5em;
  margin-bottom: 10px;
  color: var(--page-about-primary-color);
}

/* Advantage Items */
.page-about__advantage-item {
  background-color: var(--page-about-secondary-color);
  border-radius: 10px;
  padding: 30px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  text-align: center;
  color: var(--page-about-text-dark);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.page-about__advantage-title {
  font-size: 1.8em;
  margin-bottom: 15px;
  color: var(--page-about-primary-color);
}

.page-about__advantage-image {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin-top: 20px;
}

/* Testimonials */
.page-about__testimonial-card {
  background-color: var(--page-about-secondary-color);
  border-radius: 10px;
  padding: 30px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  color: var(--page-about-text-dark);
  text-align: left;
}

.page-about__dark-section .page-about__testimonial-card {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--page-about-text-light);
}

.page-about__testimonial-text {
  font-style: italic;
  margin-bottom: 15px;
  font-size: 1.1em;
}

.page-about__testimonial-author {
  font-weight: bold;
  text-align: right;
}

.page-about__banner-image {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 50px auto 0 auto;
    border-radius: 10px;
}

/* FAQ Section */
.page-about__faq-list {
  max-width: 900px;
  margin: 0 auto;
}

.page-about__faq-item {
  background-color: var(--page-about-secondary-color);
  border-radius: 8px;
  margin-bottom: 15px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  overflow: hidden;
  color: var(--page-about-text-dark);
}

.page-about__faq-item details {
    border-radius: 8px;
}

.page-about__faq-item summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  font-size: 1.2em;
  font-weight: bold;
  cursor: pointer;
  background-color: var(--page-about-primary-color);
  color: var(--page-about-text-light);
  border-radius: 8px;
  list-style: none; /* Ẩn marker mặc định */
}

.page-about__faq-item summary::-webkit-details-marker {
  display: none; /* Ẩn marker mặc định cho WebKit */
}

.page-about__faq-question .page-about__faq-toggle {
  font-size: 1.5em;
  line-height: 1;
  transition: transform 0.3s ease;
}

.page-about__faq-item[open] .page-about__faq-question .page-about__faq-toggle {
  transform: rotate(45deg);
}

.page-about__faq-answer {
  padding: 20px;
  font-size: 1em;
  line-height: 1.6;
  background-color: var(--page-about-bg-light);
  border-top: 1px solid #eee;
  color: var(--page-about-text-dark);
}

.page-about__faq-answer p {
    margin-bottom: 0;
}

/* CTA Section */
.page-about__cta-section {
  text-align: center;
  padding: 80px 20px;
}

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

/* Responsive Design */

/* Tất cả hình ảnh và video phải có kích thước tối thiểu 200px */
.page-about img, .page-about video {
  min-width: 200px;
  min-height: 200px;
}

@media (max-width: 992px) {
  .page-about__hero-title {
    font-size: 2.8em;
  }

  .page-about__heading {
    font-size: 2em;
  }

  .page-about__grid-3-col {
    grid-template-columns: 1fr 1fr;
  }

  .page-about__card-title,
  .page-about__value-title,
  .page-about__advantage-title {
    font-size: 1.5em;
  }
}

@media (max-width: 768px) {
  .page-about__hero-section {
    padding-top: var(--header-offset, 120px) !important;
    padding-bottom: 60px;
  }

  .page-about__hero-title {
    font-size: 2em;
  }

  .page-about__hero-description {
    font-size: 1em;
  }

  .page-about__hero-buttons,
  .page-about__cta-buttons {
    flex-direction: column;
    gap: 15px;
  }

  .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__grid-2-col,
  .page-about__grid-3-col {
    grid-template-columns: 1fr;
  }

  .page-about__container,
  .page-about__section,
  .page-about__card,
  .page-about__value-item,
  .page-about__advantage-item,
  .page-about__testimonial-card,
  .page-about__faq-item {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }

  /* Responsive images and videos */
  .page-about img,
  .page-about video {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    display: block !important;
  }

  .page-about__hero-image {
    width: 100% !important;
    height: 100% !important;
  }

  .page-about__video-section,
  .page-about__video-container,
  .page-about__video-wrapper {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
    overflow: hidden !important;
  }

  .page-about__faq-item summary {
    font-size: 1.1em;
    padding: 15px;
  }

  .page-about__faq-answer {
    padding: 15px;
  }
}

@media (max-width: 480px) {
  .page-about__hero-title {
    font-size: 1.8em;
  }

  .page-about__heading {
    font-size: 1.8em;
  }

  .page-about__intro {
    font-size: 0.95em;
  }

  .page-about__btn-primary,
  .page-about__btn-secondary {
    font-size: 1em;
    padding: 12px 20px;
  }
}