/* Base styles for the page-su-kien scope */
.page-su-kien {
  font-family: 'Arial', sans-serif;
  color: var(--text-main, #F3F8FF); /* Default text color for dark body background */
  line-height: 1.6;
  background-color: transparent; /* Body background is handled by shared.css var(--color-deep-navy) */
}

.page-su-kien__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 15px;
}

.page-su-kien__section {
  padding: 40px 0;
}

.page-su-kien__section-title {
  font-size: clamp(28px, 4vw, 38px);
  font-weight: 700;
  color: var(--gold, #F2C14E);
  text-align: center;
  margin-bottom: 30px;
  line-height: 1.2;
}

.page-su-kien__section-title--centered {
  text-align: center;
}

.page-su-kien__paragraph {
  font-size: 16px;
  color: var(--text-main, #F3F8FF);
  margin-bottom: 15px;
  text-align: justify;
}

.page-su-kien__paragraph--centered {
  text-align: center;
}

.page-su-kien__text-secondary {
  color: var(--text-secondary, #AFC4E8);
}

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

.page-su-kien__hero-image-wrap {
  width: 100%;
  max-height: 500px;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  z-index: 0;
}

.page-su-kien__hero-image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  filter: brightness(0.7);
}

.page-su-kien__hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px;
  margin-top: -200px; /* Overlap slightly for visual effect */
  padding: 0 15px;
}

.page-su-kien__main-title {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 900;
  color: var(--gold, #F2C14E);
  margin-bottom: 20px;
  line-height: 1.1;
  text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.5);
}

.page-su-kien__intro-text {
  font-size: 18px;
  color: var(--text-main, #F3F8FF);
  margin-bottom: 30px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

/* CTA Buttons */
.page-su-kien__cta-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 30px;
  flex-wrap: wrap; /* Allow wrapping on smaller screens */
}

.page-su-kien__cta-buttons--centered {
  justify-content: center;
}

.page-su-kien__btn-primary,
.page-su-kien__btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 15px 30px;
  border-radius: 8px;
  font-size: 18px;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  min-width: 200px;
  text-align: center;
}

.page-su-kien__btn-primary {
  background: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%);
  color: #ffffff;
  border: 2px solid transparent;
}

.page-su-kien__btn-primary:hover {
  background: linear-gradient(180deg, #1144A6 0%, #2B73F6 100%);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.page-su-kien__btn-secondary {
  background: transparent;
  color: var(--gold, #F2C14E);
  border: 2px solid var(--gold, #F2C14E);
}

.page-su-kien__btn-secondary:hover {
  background: var(--gold, #F2C14E);
  color: var(--deep-navy, #08162B);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Event Card for Featured Event */
.page-su-kien__event-card {
  display: flex;
  align-items: center;
  background: var(--card-bg, #10233F);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
  margin-top: 40px;
  border: 1px solid var(--border, #244D84);
}

.page-su-kien__event-details {
  flex: 1;
  padding: 40px;
}

.page-su-kien__event-image-wrap {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}

.page-su-kien__event-image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.page-su-kien__event-title {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 800;
  color: var(--text-main, #F3F8FF);
  margin-bottom: 15px;
  line-height: 1.2;
}

.page-su-kien__event-date {
  font-size: 16px;
  color: var(--text-secondary, #AFC4E8);
  margin-bottom: 20px;
  font-style: italic;
}

.page-su-kien__event-highlights {
  list-style: none;
  padding: 0;
  margin-bottom: 30px;
}

.page-su-kien__event-highlights li {
  font-size: 16px;
  color: var(--text-main, #F3F8FF);
  margin-bottom: 10px;
  position: relative;
  padding-left: 25px;
}

.page-su-kien__event-highlights li::before {
  content: '✓';
  color: var(--gold, #F2C14E);
  position: absolute;
  left: 0;
  font-weight: bold;
}

/* Other Event Types Grid */
.page-su-kien__event-types-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.page-su-kien__card {
  background: var(--card-bg, #10233F);
  border-radius: 12px;
  padding: 25px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  text-align: center;
  border: 1px solid var(--border, #244D84);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.page-su-kien__card-image {
  width: 100%;
  max-width: 400px;
  height: auto;
  border-radius: 8px;
  margin-bottom: 20px;
  object-fit: cover;
}

.page-su-kien__card-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-main, #F3F8FF);
  margin-bottom: 15px;
  line-height: 1.3;
}

.page-su-kien__card .page-su-kien__btn-secondary {
  margin-top: auto;
}

/* Benefits Section */
.page-su-kien__benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.page-su-kien__benefit-item {
  text-align: center;
  background: var(--card-bg, #10233F);
  border-radius: 12px;
  padding: 30px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border, #244D84);
}

.page-su-kien__benefit-image {
  width: 100%;
  max-width: 300px;
  height: auto;
  object-fit: contain;
  margin-bottom: 20px;
}

.page-su-kien__benefit-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-main, #F3F8FF);
  margin-bottom: 15px;
}

/* How to Join Section */
.page-su-kien__steps-list {
  list-style: none;
  padding: 0;
  margin-top: 40px;
}

.page-su-kien__steps-list li {
  background: var(--card-bg, #10233F);
  border-radius: 12px;
  padding: 30px;
  margin-bottom: 20px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border, #244D84);
}

.page-su-kien__step-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--gold, #F2C14E);
  margin-bottom: 10px;
}

.page-su-kien__steps-list li a {
  color: var(--glow, #4FA8FF);
  text-decoration: none;
}

.page-su-kien__steps-list li a:hover {
  text-decoration: underline;
}

/* Past Events Section */
.page-su-kien__past-events-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

/* FAQ Section */
details.page-su-kien__faq-item {
  margin-bottom: 15px;
  border-radius: 5px;
  border: 1px solid var(--border, #244D84);
  overflow: hidden;
  background: var(--card-bg, #10233F);
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
details.page-su-kien__faq-item summary.page-su-kien__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 20px;
  cursor: pointer;
  user-select: none;
  list-style: none;
  transition: background-color 0.3s ease;
}
details.page-su-kien__faq-item summary.page-su-kien__faq-question::-webkit-details-marker {
  display: none;
}
details.page-su-kien__faq-item summary.page-su-kien__faq-question:hover {
  background: rgba(var(--color-deep-navy-rgb), 0.5); /* Use rgba for hover effect */
}
.page-su-kien__faq-qtext {
  flex: 1;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  text-align: left;
  color: var(--text-main, #F3F8FF);
}
.page-su-kien__faq-toggle {
  font-size: 24px;
  font-weight: bold;
  color: var(--gold, #F2C14E);
  flex-shrink: 0;
  margin-left: 15px;
  width: 28px;
  text-align: center;
}
details.page-su-kien__faq-item .page-su-kien__faq-answer {
  padding: 0 20px 20px;
  background: rgba(var(--color-deep-navy-rgb), 0.3); /* Slightly lighter background for answer */
  border-radius: 0 0 5px 5px;
}
.page-su-kien__faq-answer p {
  color: var(--text-secondary, #AFC4E8);
  margin-top: 10px;
  text-align: justify;
}

.page-su-kien__faq-answer a {
  color: var(--glow, #4FA8FF);
  text-decoration: none;
}

.page-su-kien__faq-answer a:hover {
  text-decoration: underline;
}

/* Final CTA Section */
.page-su-kien__final-cta-section {
  text-align: center;
  padding-bottom: 60px;
}

/* Responsive Styles */
@media (max-width: 1024px) {
  .page-su-kien__hero-content {
    margin-top: -150px;
  }
  .page-su-kien__event-card {
    flex-direction: column;
  }
  .page-su-kien__event-details {
    padding: 30px;
  }
  .page-su-kien__event-image-wrap {
    order: -1; /* Image on top */
    width: 100%;
  }
  .page-su-kien__event-image {
    max-height: 350px;
  }
}

@media (max-width: 768px) {
  .page-su-kien__hero-section {
    padding-top: 10px; /* Ensure small top padding */
    padding-bottom: 40px;
  }

  .page-su-kien__hero-image-wrap {
    max-height: 300px;
  }

  .page-su-kien__hero-image {
    object-fit: contain !important; /* Mobile: prevent cropping */
    aspect-ratio: unset !important; /* Mobile: maintain aspect ratio */
    filter: brightness(0.8);
  }

  .page-su-kien__hero-content {
    margin-top: -100px; /* Adjust overlap */
    padding: 0 10px;
  }

  .page-su-kien__main-title {
    font-size: clamp(28px, 8vw, 40px);
    margin-bottom: 15px;
  }

  .page-su-kien__intro-text {
    font-size: 15px;
    margin-bottom: 25px;
  }

  .page-su-kien__cta-buttons {
    flex-direction: column !important; /* Mobile: stack buttons vertically */
    gap: 15px;
    padding: 0 15px;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
  }

  .page-su-kien__btn-primary,
  .page-su-kien__btn-secondary {
    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: 16px;
  }

  .page-su-kien__section {
    padding: 30px 0;
  }

  .page-su-kien__section-title {
    font-size: clamp(24px, 6vw, 32px);
    margin-bottom: 20px;
  }

  .page-su-kien__paragraph {
    font-size: 15px;
    padding: 0 10px; /* Add padding for readability on mobile */
  }

  .page-su-kien__event-card {
    margin-top: 30px;
    flex-direction: column;
  }

  .page-su-kien__event-details {
    padding: 25px;
  }

  .page-su-kien__event-title {
    font-size: clamp(20px, 5vw, 28px);
    margin-bottom: 10px;
  }

  .page-su-kien__event-date {
    font-size: 14px;
    margin-bottom: 15px;
  }

  .page-su-kien__event-highlights li {
    font-size: 15px;
  }

  .page-su-kien__event-types-grid,
  .page-su-kien__benefits-grid,
  .page-su-kien__past-events-grid {
    grid-template-columns: 1fr;
    gap: 20px;
    margin-top: 30px;
  }

  .page-su-kien__card,
  .page-su-kien__benefit-item,
  .page-su-kien__steps-list li {
    padding: 20px;
    margin: 0 10px; /* Ensure cards don't touch screen edges */
  }

  .page-su-kien__card-image,
  .page-su-kien__benefit-image {
    max-width: 80%;
  }

  .page-su-kien__card-title,
  .page-su-kien__benefit-title,
  .page-su-kien__step-title {
    font-size: 20px;
    margin-bottom: 10px;
  }

  details.page-su-kien__faq-item summary.page-su-kien__faq-question { padding: 15px; }
  .page-su-kien__faq-qtext { font-size: 15px; }
  details.page-su-kien__faq-item .page-su-kien__faq-answer { padding: 0 15px 15px; }

  .page-su-kien img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }
  
  .page-su-kien__section,
  .page-su-kien__card,
  .page-su-kien__container,
  .page-su-kien__event-card,
  .page-su-kien__benefit-item,
  .page-su-kien__steps-list li {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }

  .page-su-kien__introduction-section .page-su-kien__paragraph,
  .page-su-kien__featured-events-section .page-su-kien__paragraph,
  .page-su-kien__other-events-section .page-su-kien__paragraph,
  .page-su-kien__benefits-section .page-su-kien__paragraph,
  .page-su-kien__how-to-join-section .page-su-kien__paragraph,
  .page-su-kien__past-events-section .page-su-kien__paragraph,
  .page-su-kien__final-cta-section .page-su-kien__paragraph {
    padding-left: 0;
    padding-right: 0;
  }
}