/* style/about.css */

/* Biến CSS */
:root {
  --page-about-primary-color: #FFD700; /* Vàng kim */
  --page-about-secondary-color: #2C3E50; /* Xanh đậm/Than xám */
  --page-about-accent-color: #E74C3C; /* Đỏ nhấn */
  --page-about-text-dark: #2C3E50; /* Văn bản đậm */
  --page-about-text-light: #ffffff; /* Văn bản sáng */
  --page-about-background-light: #f5f5f5; /* Nền sáng */
  --page-about-background-dark: #1a2a3a; /* Nền đậm */
}

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

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

.page-about__hero-section {
  background: linear-gradient(135deg, var(--page-about-primary-color) 0%, var(--page-about-secondary-color) 100%);
  color: var(--page-about-text-light);
  padding: 100px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-about__hero-section::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 50% 50%, rgba(255,215,0,0.2) 0%, rgba(44,62,80,0.2) 100%);
  opacity: 0.3;
  animation: page-about-hero-animate 20s infinite alternate;
}

@keyframes page-about-hero-animate {
  0% { transform: scale(1); }
  100% { transform: scale(1.1); }
}

.page-about__hero-title {
  font-size: 3.5em;
  margin-bottom: 20px;
  font-weight: bold;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
  position: relative;
  z-index: 1;
}

.page-about__hero-subtitle {
  font-size: 1.5em;
  margin-bottom: 40px;
  position: relative;
  z-index: 1;
}

.page-about__section-title {
  font-size: 2.5em;
  color: var(--page-about-secondary-color);
  text-align: center;
  margin-bottom: 60px;
  position: relative;
}

.page-about__section-title::after {
  content: '';
  display: block;
  width: 80px;
  height: 4px;
  background-color: var(--page-about-primary-color);
  margin: 15px auto 0;
  border-radius: 2px;
}

.page-about__story-section {
  padding: 80px 0;
  background-color: var(--page-about-background-light);
}

.page-about__content-flex {
  display: flex;
  align-items: center;
  gap: 40px;
}

.page-about__text-content {
  flex: 1;
  font-size: 1.1em;
}

.page-about__text-content p {
  margin-bottom: 20px;
}

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

.page-about__image-wrapper {
  flex: 1;
  text-align: center;
}

.page-about__image {
  max-width: 100%;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.page-about__image--center {
  display: block;
  margin: 40px auto;
  max-width: 80%;
}

.page-about__image--small {
  max-width: 60%;
}

.page-about__mission-vision-section {
  background-color: var(--page-about-background-dark);
  color: var(--page-about-text-light);
  padding: 80px 0;
}

.page-about__mission-vision-section .page-about__section-title {
  color: var(--page-about-primary-color);
}

.page-about__mission-vision-section .page-about__section-title::after {
  background-color: var(--page-about-text-light);
}

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

.page-about__card {
  background-color: rgba(255, 255, 255, 0.08);
  padding: 30px;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s ease, background-color 0.3s ease;
}

.page-about__card:hover {
  transform: translateY(-10px);
  background-color: rgba(255, 255, 255, 0.15);
}

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

.page-about__card p {
  font-size: 1.05em;
  color: #ccc;
}

.page-about__values-section {
  padding: 80px 0;
  background-color: var(--page-about-background-light);
}

.page-about__values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.page-about__value-item {
  background-color: #ffffff;
  padding: 30px;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s ease;
}

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

.page-about__value-icon {
  font-size: 3em;
  color: var(--page-about-primary-color);
  margin-bottom: 15px;
  display: block;
}

.page-about__value-item h4 {
  font-size: 1.5em;
  color: var(--page-about-secondary-color);
  margin-bottom: 10px;
}

.page-about__value-item p {
  color: #666;
}

.page-about__cta-section {
  background: var(--page-about-secondary-color);
  color: var(--page-about-text-light);
  padding: 80px 0;
  text-align: center;
}

.page-about__cta-title {
  font-size: 2.8em;
  color: var(--page-about-primary-color);
  margin-bottom: 20px;
}

.page-about__cta-text {
  font-size: 1.3em;
  margin-bottom: 40px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

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

.page-about__btn {
  display: inline-block;
  padding: 15px 30px;
  border-radius: 5px;
  text-decoration: none;
  font-weight: bold;
  font-size: 1.1em;
  transition: background-color 0.3s ease, transform 0.3s ease;
  white-space: nowrap;
}

.page-about__btn--primary {
  background-color: var(--page-about-accent-color); /* Đỏ nhấn */
  color: var(--page-about-text-light);
  border: 2px solid var(--page-about-accent-color);
}

.page-about__btn--primary:hover {
  background-color: #c0392b;
  transform: translateY(-3px);
}

.page-about__btn--secondary {
  background-color: transparent;
  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);
  transform: translateY(-3px);
}

.page-about__btn--large {
  padding: 18px 35px;
  font-size: 1.2em;
}

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

  .page-about__hero-subtitle {
    font-size: 1.3em;
  }

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

  .page-about__content-flex {
    flex-direction: column;
  }

  .page-about__image--center {
    max-width: 90%;
  }
}

@media (max-width: 768px) {
  .page-about__hero-section,
  .page-about__story-section,
  .page-about__mission-vision-section,
  .page-about__values-section,
  .page-about__cta-section {
    padding: 60px 0;
  }

  .page-about__hero-title {
    font-size: 2.2em;
  }

  .page-about__hero-subtitle {
    font-size: 1.1em;
  }

  .page-about__section-title {
    font-size: 1.8em;
    margin-bottom: 40px;
  }

  .page-about__card-grid,
  .page-about__values-grid {
    grid-template-columns: 1fr;
  }

  .page-about__cta-title {
    font-size: 2.2em;
  }

  .page-about__cta-text {
    font-size: 1.1em;
  }

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

  .page-about__btn--large {
    width: 100%;
    max-width: 300px;
  }

  .page-about__image--small {
    max-width: 80%;
  }
}

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

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

  .page-about__btn {
    padding: 12px 25px;
    font-size: 1em;
  }

  .page-about__btn--large {
    padding: 15px 30px;
    font-size: 1.1em;
  }
}