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

.page-su-kien__section {
  padding: 40px 0;
  margin-bottom: 20px;
  border-radius: 8px;
  overflow: hidden;
}

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

.page-su-kien__dark-bg {
  background-color: var(--color-background);
  color: var(--color-text-main);
}

.page-su-kien__light-bg {
  background-color: var(--color-card-bg);
  color: var(--color-text-main);
}

.page-su-kien__section-title {
  font-size: clamp(24px, 4vw, 36px);
  font-weight: bold;
  text-align: center;
  margin-bottom: 30px;
  color: var(--color-text-main);
  line-height: 1.2;
}

.page-su-kien__text-block {
  font-size: 16px;
  margin-bottom: 20px;
  text-align: justify;
  color: var(--color-text-secondary);
}

.page-su-kien__inline-link {
  color: var(--color-primary);
  text-decoration: underline;
}

.page-su-kien__inline-link:hover {
  color: var(--color-secondary);
}

/* Hero Section */
.page-su-kien__hero-section {
  position: relative;
  padding-top: 10px; /* Rely on body padding-top from shared.css */
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  color: var(--color-text-main);
  min-height: 500px;
  justify-content: center;
}

.page-su-kien__hero-image-wrapper {
  width: 100%;
  max-height: 675px; /* Adjust based on typical hero aspect ratio */
  overflow: hidden;
}

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

.page-su-kien__hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  padding: 30px 20px;
  margin-top: -100px; /* Pull content up over image slightly for visual flow */
  background: rgba(0, 0, 0, 0.6); /* Semi-transparent background for readability */
  border-radius: 10px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(5px);
}

.page-su-kien__main-title {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800;
  margin-bottom: 15px;
  color: var(--color-text-main);
  line-height: 1.1;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.page-su-kien__description {
  font-size: 18px;
  margin-bottom: 30px;
  color: var(--color-text-secondary);
}

/* Buttons */
.page-su-kien__btn-primary,
.page-su-kien__btn-secondary {
  display: inline-block;
  padding: 14px 30px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  transition: all 0.3s ease;
  cursor: pointer;
  text-align: center;
  max-width: 100%;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-su-kien__btn-primary {
  background: linear-gradient(180deg, #2AD16F 0%, #13994A 100%);
  color: #ffffff;
  border: none;
}

.page-su-kien__btn-primary:hover {
  background: linear-gradient(180deg, #13994A 0%, #2AD16F 100%);
  transform: translateY(-2px);
}

.page-su-kien__btn-secondary {
  background: var(--color-card-bg);
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.page-su-kien__btn-secondary:hover {
  background: var(--color-primary);
  color: #ffffff;
  transform: translateY(-2px);
}

.page-su-kien__btn--center {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: fit-content;
}

/* Grid for event types */
.page-su-kien__grid {
  display: grid;
  gap: 30px;
  margin-top: 30px;
}

.page-su-kien__grid--3-cols {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.page-su-kien__card {
  background-color: var(--color-background);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-bottom: 20px;
}

.page-su-kien__card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
  margin-bottom: 15px;
}

.page-su-kien__card-title {
  font-size: 20px;
  font-weight: bold;
  margin-bottom: 10px;
  color: var(--color-text-main);
  padding: 0 15px;
}

.page-su-kien__card-description {
  font-size: 15px;
  color: var(--color-text-secondary);
  padding: 0 15px;
  flex-grow: 1;
  margin-bottom: 20px;
}

/* Hot Events */
.page-su-kien__hot-events .page-su-kien__event-item {
  background-color: var(--color-card-bg);
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  margin-bottom: 40px;
  overflow: hidden;
}

.page-su-kien__hot-events .page-su-kien__event-image {
  width: 100%;
  height: auto;
  max-height: 450px;
  object-fit: cover;
  display: block;
  margin-bottom: 25px;
}

.page-su-kien__hot-events .page-su-kien__event-title {
  font-size: 28px;
  font-weight: bold;
  margin-bottom: 10px;
  color: var(--color-text-main);
  text-align: center;
  padding: 0 20px;
}

.page-su-kien__hot-events .page-su-kien__event-meta {
  font-size: 14px;
  color: var(--color-text-secondary);
  text-align: center;
  margin-bottom: 20px;
}

.page-su-kien__hot-events .page-su-kien__text-block {
  padding: 0 20px;
  margin-bottom: 20px;
}

.page-su-kien__hot-events .page-su-kien__event-details {
  list-style: none;
  padding: 0 20px 20px;
  margin: 0;
}

.page-su-kien__hot-events .page-su-kien__event-details li {
  margin-bottom: 10px;
  font-size: 16px;
  color: var(--color-text-secondary);
}

.page-su-kien__hot-events .page-su-kien__event-details strong {
  color: var(--color-text-main);
}

.page-su-kien__hot-events .page-su-kien__btn-primary {
  margin: 0 auto 20px;
  display: block;
  width: fit-content;
}

/* How To Join */
.page-su-kien__how-to-join .page-su-kien__steps-list {
  list-style: none;
  padding: 0;
  margin-top: 30px;
}

.page-su-kien__how-to-join .page-su-kien__steps-list li {
  background-color: var(--color-background);
  border-left: 5px solid var(--color-primary);
  padding: 20px;
  margin-bottom: 15px;
  border-radius: 8px;
  font-size: 17px;
  color: var(--color-text-secondary);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.page-su-kien__how-to-join .page-su-kien__steps-list strong {
  color: var(--color-text-main);
  display: block;
  margin-bottom: 5px;
}

/* Benefits Section */
.page-su-kien__benefits-section .page-su-kien__benefits-list {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin-top: 30px;
}

.page-su-kien__benefits-section .page-su-kien__benefits-list li {
  background-color: var(--color-card-bg);
  padding: 25px;
  border-radius: 10px;
  font-size: 17px;
  color: var(--color-text-secondary);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: relative;
  padding-left: 50px;
}

.page-su-kien__benefits-section .page-su-kien__benefits-list li::before {
  content: '✔';
  position: absolute;
  left: 20px;
  top: 25px;
  color: var(--color-primary);
  font-size: 20px;
  font-weight: bold;
}

.page-su-kien__benefits-section .page-su-kien__benefits-list strong {
  color: var(--color-text-main);
  display: block;
  margin-bottom: 5px;
}

/* FAQ Section */
details.page-su-kien__faq-item {
  margin-bottom: 15px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  overflow: hidden;
  background: var(--color-background);
}

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;
  color: var(--color-text-main);
}

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-primary-rgb), 0.1);
}

.page-su-kien__faq-qtext {
  flex: 1;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  text-align: left;
}

.page-su-kien__faq-toggle {
  font-size: 24px;
  font-weight: bold;
  color: var(--color-primary);
  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: var(--color-card-bg);
  border-radius: 0 0 8px 8px;
  color: var(--color-text-secondary);
}

.page-su-kien__faq-answer p {
  margin-top: 0;
  margin-bottom: 0;
}

.page-su-kien__faq-answer .page-su-kien__inline-link {
  color: var(--color-primary);
}

/* CTA Bottom */
.page-su-kien__cta-bottom {
  text-align: center;
  padding: 60px 0;
}

.page-su-kien__cta-bottom .page-su-kien__section-title {
  margin-bottom: 20px;
}

.page-su-kien__cta-bottom .page-su-kien__text-block {
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 40px;
}

.page-su-kien__cta-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 30px;
}

/* Responsive Styles */
@media (max-width: 1024px) {
  .page-su-kien__hero-content {
    margin-top: -80px;
    padding: 25px 15px;
  }

  .page-su-kien__main-title {
    font-size: clamp(28px, 4.5vw, 48px);
  }

  .page-su-kien__description {
    font-size: 16px;
  }

  .page-su-kien__section-title {
    font-size: clamp(22px, 3.5vw, 32px);
  }

  .page-su-kien__card-title {
    font-size: 18px;
  }

  .page-su-kien__hot-events .page-su-kien__event-title {
    font-size: 24px;
  }
}

@media (max-width: 768px) {
  .page-su-kien__hero-section {
    padding-top: 10px !important;
    min-height: 400px;
  }

  .page-su-kien__hero-image {
    object-fit: contain !important;
    aspect-ratio: unset !important;
    height: auto !important;
    max-width: 100% !important;
    width: 100% !important;
  }

  .page-su-kien__hero-content {
    margin-top: -50px;
    padding: 20px 10px;
    width: 90%;
    box-sizing: border-box !important;
  }

  .page-su-kien__main-title {
    font-size: clamp(26px, 8vw, 38px);
    margin-bottom: 10px;
  }

  .page-su-kien__description {
    font-size: 15px;
    margin-bottom: 20px;
  }

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

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

  .page-su-kien__section-title {
    font-size: clamp(20px, 6vw, 28px);
    margin-bottom: 20px;
  }

  .page-su-kien__text-block {
    font-size: 15px;
    text-align: left;
  }

  .page-su-kien__grid--3-cols {
    grid-template-columns: 1fr;
  }

  .page-su-kien__card {
    padding-bottom: 15px;
  }

  .page-su-kien__card-image {
    height: 180px;
  }

  .page-su-kien__card-title {
    font-size: 17px;
  }

  .page-su-kien__card-description {
    font-size: 14px;
  }

  .page-su-kien__hot-events .page-su-kien__event-item {
    margin-bottom: 30px;
  }

  .page-su-kien__hot-events .page-su-kien__event-image {
    max-height: 250px;
  }

  .page-su-kien__hot-events .page-su-kien__event-title {
    font-size: 20px;
    padding: 0 15px;
  }

  .page-su-kien__hot-events .page-su-kien__text-block {
    padding: 0 15px;
  }

  .page-su-kien__hot-events .page-su-kien__event-details {
    padding: 0 15px 15px;
  }

  .page-su-kien__how-to-join .page-su-kien__steps-list li {
    font-size: 15px;
    padding: 15px;
  }

  .page-su-kien__benefits-section .page-su-kien__benefits-list {
    grid-template-columns: 1fr;
  }

  .page-su-kien__benefits-section .page-su-kien__benefits-list li {
    font-size: 15px;
    padding: 15px 15px 15px 45px;
  }

  .page-su-kien__benefits-section .page-su-kien__benefits-list li::before {
    top: 15px;
    left: 15px;
  }

  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__cta-bottom {
    padding: 40px 0;
  }

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

  .page-su-kien__btn-primary,
  .page-su-kien__btn-secondary,
  .page-su-kien a[class*="button"],
  .page-su-kien 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;
  }

  /* General image responsiveness */
  .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 {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }
}