/* style/about.css */
/* body đã padding-top: var(--header-offset) từ shared.css; trang này không cần lặp lại */

:root {
  --color-primary: #11A84E;
  --color-secondary: #22C768;
  --color-button-gradient-start: #2AD16F;
  --color-button-gradient-end: #13994A;
  --color-card-bg: #11271B;
  --color-background: #08160F;
  --color-text-main: #F2FFF6;
  --color-text-secondary: #A7D9B8;
  --color-border: #2E7A4E;
  --color-glow: #57E38D;
  --color-gold: #F2C14E;
  --color-divider: #1E3A2A;
  --color-deep-green: #0A4B2C;
}

.page-about {
  font-family: 'Arial', sans-serif;
  color: var(--color-text-main); /* Body background is dark, so text is light */
  background-color: var(--color-background);
}

.page-about__hero-section {
  position: relative;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 60px 20px;
  padding-top: 10px; /* Small top padding, body handles header offset */
  background-color: var(--color-background);
  overflow: hidden;
}

.page-about__hero-image-wrapper {
  width: 100%;
  max-width: 100%;
  margin-bottom: 30px;
  text-align: center;
}

.page-about__hero-image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border-radius: 10px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
}

.page-about__hero-content {
  text-align: center;
  max-width: 900px;
  z-index: 1;
}

.page-about__main-title {
  font-weight: bold;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-gold);
  margin-bottom: 20px;
  text-shadow: 0 0 10px rgba(87, 227, 141, 0.5);
  font-size: clamp(2.2rem, 4vw, 3.5rem);
}

.page-about__hero-description {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: 30px;
}

.page-about__btn-primary {
  display: inline-block;
  padding: 15px 35px;
  background: linear-gradient(180deg, var(--color-button-gradient-start) 0%, var(--color-button-gradient-end) 100%);
  color: var(--color-text-main);
  text-decoration: none;
  border-radius: 8px;
  font-weight: bold;
  font-size: 1.1rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  border: none;
}

.page-about__btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

.page-about__btn-secondary {
  display: inline-block;
  padding: 15px 35px;
  background: transparent;
  color: var(--color-primary);
  text-decoration: none;
  border-radius: 8px;
  font-weight: bold;
  font-size: 1.1rem;
  transition: background-color 0.3s ease, color 0.3s ease;
  border: 2px solid var(--color-primary);
  margin-left: 20px;
}

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

.page-about__section {
  padding: 80px 20px;
  background-color: var(--color-background);
  border-bottom: 1px solid var(--color-divider);
}

.page-about__dark-section {
  background-color: var(--color-deep-green);
}

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

.page-about__section-title {
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  color: var(--color-gold);
  text-align: center;
  margin-bottom: 40px;
  font-weight: bold;
  text-shadow: 0 0 8px rgba(87, 227, 141, 0.3);
}

.page-about__text-block {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: 25px;
  text-align: justify;
}

.page-about__grid-layout {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.page-about__grid-item {
  background-color: var(--color-card-bg);
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
  text-align: center;
  transition: transform 0.3s ease;
}

.page-about__grid-item:hover {
  transform: translateY(-5px);
}

.page-about__item-title {
  font-size: 1.5rem;
  color: var(--color-primary);
  margin-top: 20px;
  margin-bottom: 15px;
  font-weight: bold;
}

.page-about__item-description {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.page-about__image {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 8px;
  margin: 0 auto;
}

.page-about__image--center {
  margin-top: 40px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.page-about__feature-list {
  list-style: none;
  padding: 0;
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(45%, 1fr));
  gap: 30px;
}

.page-about__feature-item {
  background-color: var(--color-card-bg);
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

.page-about__feature-heading {
  font-size: 1.4rem;
  color: var(--color-primary);
  margin-bottom: 15px;
  font-weight: bold;
}

.page-about__feature-description {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.page-about__milestone-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 40px;
  text-align: center;
}

.page-about__milestone-item {
  background-color: var(--color-card-bg);
  padding: 25px;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.page-about__milestone-year {
  font-size: 2.2rem;
  color: var(--color-gold);
  margin-bottom: 10px;
  font-weight: bold;
}

.page-about__milestone-description {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

.page-about__responsibility-list {
  list-style: none;
  padding: 0;
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.page-about__responsibility-item {
  background-color: var(--color-card-bg);
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

.page-about__responsibility-heading {
  font-size: 1.4rem;
  color: var(--color-primary);
  margin-bottom: 15px;
  font-weight: bold;
}

.page-about__responsibility-description {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.page-about__section--cta {
  text-align: center;
  padding: 100px 20px;
  background-color: var(--color-deep-green);
  position: relative;
  overflow: hidden;
}

.page-about__cta-content {
  position: relative;
  z-index: 1;
}

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

.page-about__image--cta {
  position: absolute;
  bottom: -50px;
  left: 50%;
  transform: translateX(-50%);
  opacity: 0.2;
  max-width: 100%;
  height: auto;
  width: 100%;
  object-fit: cover;
  z-index: 0;
}

.page-about__faq-list {
  margin-top: 40px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.page-about__faq-item {
  background-color: var(--color-card-bg);
  margin-bottom: 15px;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  border: 1px solid var(--color-border);
}

.page-about__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 25px;
  font-size: 1.15rem;
  font-weight: bold;
  color: var(--color-primary);
  cursor: pointer;
  background-color: var(--color-deep-green);
  border-bottom: 1px solid var(--color-divider);
  list-style: none; /* For details/summary */
}

.page-about__faq-question::-webkit-details-marker {
  display: none;
}

.page-about__faq-question:hover {
  background-color: var(--color-primary);
  color: var(--color-text-main);
}

.page-about__faq-question:hover .page-about__faq-toggle {
  color: var(--color-text-main);
}

.page-about__faq-toggle {
  font-size: 1.8rem;
  line-height: 1;
  margin-left: 15px;
  color: var(--color-primary);
  transition: transform 0.3s ease;
}

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

.page-about__faq-answer {
  padding: 20px 25px;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
  background-color: var(--color-card-bg);
}

/* Responsive Styles */
@media (max-width: 1024px) {
  .page-about__hero-section {
    padding: 40px 15px;
  }

  .page-about__main-title {
    font-size: clamp(2rem, 4.5vw, 3rem);
  }

  .page-about__hero-description {
    font-size: 1.05rem;
  }

  .page-about__section {
    padding: 60px 15px;
  }

  .page-about__section-title {
    font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  }

  .page-about__grid-layout {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  }

  .page-about__feature-list {
    grid-template-columns: 1fr;
  }

  .page-about__milestone-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  }

  .page-about__responsibility-list {
    grid-template-columns: 1fr;
  }

  .page-about__cta-buttons {
    flex-direction: column;
    gap: 15px;
  }
  
  .page-about__btn-secondary {
    margin-left: 0;
  }
}

@media (max-width: 768px) {
  .page-about {
    font-size: 16px;
    line-height: 1.6;
  }

  .page-about__hero-section {
    padding: 30px 15px;
    padding-top: 10px !important; /* body đã xử lý --header-offset, đây chỉ là khoảng cách trang trí */
  }

  .page-about__hero-image {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    display: block !important;
  }

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

  .page-about__main-title {
    font-size: clamp(1.8rem, 6vw, 2.5rem);
  }

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

  .page-about__btn-primary,
  .page-about__btn-secondary,
  .page-about a[class*="button"],
  .page-about a[class*="btn"] {
    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,
  .page-about__button-group,
  .page-about__btn-container {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
    flex-wrap: wrap !important;
    gap: 10px;
  }

  .page-about__section {
    padding: 40px 15px;
  }

  .page-about__container {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }

  .page-about__section-title {
    font-size: clamp(1.5rem, 5vw, 2rem);
  }

  .page-about__text-block {
    font-size: 0.95rem;
  }

  .page-about__image {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    display: block !important;
  }
  
  .page-about__grid-item,
  .page-about__feature-item,
  .page-about__milestone-item,
  .page-about__responsibility-item {
    padding: 20px;
  }

  .page-about__item-title,
  .page-about__feature-heading,
  .page-about__responsibility-heading {
    font-size: 1.2rem;
  }

  .page-about__faq-question {
    font-size: 1rem;
    padding: 15px 20px;
  }

  .page-about__faq-answer {
    padding: 15px 20px;
    font-size: 0.9rem;
  }
}