/* style/about.css */
/* body đã padding-top: var(--header-offset) từ shared.css; các section trong page-about không được sử dụng lại biến này */

:root {
  --page-about-bg: #08160F;
  --page-about-card-bg: #11271B;
  --page-about-text-main: #F2FFF6;
  --page-about-text-secondary: #A7D9B8;
  --page-about-btn-gradient: linear-gradient(180deg, #2AD16F 0%, #13994A 100%);
  --page-about-border: #2E7A4E;
  --page-about-glow: #57E38D;
  --page-about-gold: #F2C14E;
  --page-about-divider: #1E3A2A;
  --page-about-deep-green: #0A4B2C;
}

.page-about {
  color: var(--page-about-text-main);
  background-color: var(--page-about-bg);
  font-family: 'Arial', sans-serif;
  line-height: 1.6;
}

.page-about__section-spacing {
  padding: 60px 0;
}

.page-about__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  box-sizing: border-box;
}

.page-about__hero-section {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 10px; /* Small top padding, body handles --header-offset */
  padding-bottom: 60px;
  overflow: hidden;
}

.page-about__hero-image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  max-height: 500px; /* Limit hero image height */
  filter: brightness(0.7); /* Slightly darken image for text readability */
}

.page-about__hero-content {
  position: relative;
  z-index: 1;
  padding: 20px;
  max-width: 900px;
  margin-top: 30px;
}

.page-about__main-title {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  color: var(--page-about-gold);
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.2;
}

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

.page-about__cta-button {
  display: inline-block;
  background: var(--page-about-btn-gradient);
  color: var(--page-about-text-main);
  padding: 15px 30px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.1rem;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.page-about__cta-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3), 0 0 15px var(--page-about-glow);
}

.page-about__section-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  color: var(--page-about-gold);
  text-align: center;
  margin-bottom: 25px;
  font-weight: 700;
}

.page-about__section-subtitle {
  font-size: 1.1rem;
  color: var(--page-about-text-secondary);
  text-align: center;
  margin-bottom: 40px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.page-about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

.page-about__card {
  background-color: var(--page-about-card-bg);
  border: 1px solid var(--page-about-border);
  border-radius: 10px;
  padding: 30px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s ease;
  display: flex;
  flex-direction: column;
  color: var(--page-about-text-main);
}

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

.page-about__card-title {
  font-size: 1.8rem;
  color: var(--page-about-gold);
  margin-bottom: 15px;
  font-weight: 600;
}

.page-about__card-text {
  font-size: 1rem;
  color: var(--page-about-text-secondary);
  flex-grow: 1;
}

.page-about__card-image {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 8px;
  margin-top: 20px;
  object-fit: cover;
}

.page-about__features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 25px;
}

.page-about__feature-item {
  text-align: center;
}

.page-about__feature-title {
  font-size: 1.5rem;
  color: var(--page-about-gold);
  margin-bottom: 10px;
  font-weight: 600;
}

.page-about__feature-text {
  font-size: 0.95rem;
  color: var(--page-about-text-secondary);
}

.page-about__image-full-width {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 10px;
  margin: 40px 0;
  object-fit: cover;
}

.page-about__timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto 60px auto;
  padding: 20px 0;
}

.page-about__timeline::before {
  content: '';
  position: absolute;
  width: 2px;
  background-color: var(--page-about-divider);
  top: 0;
  bottom: 0;
  left: 50%;
  margin-left: -1px;
}

.page-about__timeline-item {
  padding: 10px 0;
  position: relative;
  width: 50%;
}

.page-about__timeline-item:nth-child(odd) {
  left: 0;
  padding-right: 40px;
  text-align: right;
}

.page-about__timeline-item:nth-child(even) {
  left: 50%;
  padding-left: 40px;
  text-align: left;
}

.page-about__timeline-item::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  right: -8px;
  background-color: var(--page-about-deep-green);
  border: 2px solid var(--page-about-gold);
  top: 15px;
  border-radius: 50%;
  z-index: 1;
}

.page-about__timeline-item:nth-child(even)::after {
  left: -8px;
}

.page-about__timeline-title {
  font-size: 1.4rem;
  color: var(--page-about-gold);
  font-weight: 600;
  margin-bottom: 5px;
}

.page-about__timeline-text {
  font-size: 0.95rem;
  color: var(--page-about-text-secondary);
}

.page-about__responsibility-points {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

.page-about__contact-button {
  display: block;
  width: fit-content;
  margin: 40px auto 0 auto;
  background: var(--page-about-btn-gradient);
  color: var(--page-about-text-main);
  padding: 15px 30px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.1rem;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.page-about__contact-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3), 0 0 15px var(--page-about-glow);
}

.page-about__text-link {
  color: var(--page-about-gold);
  text-decoration: none;
  transition: color 0.3s ease;
}

.page-about__text-link:hover {
  color: var(--page-about-glow);
  text-decoration: underline;
}

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

  .page-about__hero-section {
    padding-top: 10px !important;
    padding-bottom: 40px;
  }

  .page-about__main-title {
    font-size: clamp(2rem, 8vw, 2.8rem);
  }

  .page-about__description {
    font-size: 1rem;
  }

  .page-about__cta-button {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
    padding: 12px 20px;
    font-size: 1rem;
  }

  .page-about__section-spacing {
    padding: 40px 0;
  }

  .page-about__container {
    padding: 0 15px !important;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .page-about__grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .page-about__features-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .page-about__card {
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  }

  .page-about__card-title {
    font-size: 1.5rem;
  }

  .page-about__feature-title {
    font-size: 1.3rem;
  }

  .page-about__image-full-width,
  .page-about__card-image {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    display: block !important;
  }

  .page-about__timeline::before {
    left: 10px;
  }

  .page-about__timeline-item {
    width: 100%;
    padding-left: 40px;
    text-align: left;
  }

  .page-about__timeline-item:nth-child(odd) {
    padding-right: 0;
    left: 0;
  }

  .page-about__timeline-item:nth-child(even) {
    left: 0;
  }

  .page-about__timeline-item::after,
  .page-about__timeline-item:nth-child(even)::after {
    left: 3px;
  }

  .page-about__responsibility-points {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .page-about__contact-button {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
    padding: 12px 20px;
    font-size: 1rem;
  }

  .page-about__cta-bottom .page-about__cta-button {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
    padding: 12px 20px;
    font-size: 1rem;
  }
}

/* Ensure no CSS filters are applied to images */
.page-about img {
  filter: none;
}

/* Specific filter for hero image for better text contrast, not changing original color */
.page-about__hero-image {
  filter: brightness(0.7);
}