:root {
  --primary-color: #113B7A;
  --secondary-color: #1D5FD1;
  --button-gradient: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%);
  --card-bg: #10233F;
  --text-main: #F3F8FF;
  --text-secondary: #AFC4E8;
  --border-color: #244D84;
  --glow-color: #4FA8FF;
  --gold-color: #F2C14E;
  --divider-color: #1B3357;
  --deep-navy-color: #08162B;
}

.page-su-kien {
  font-family: 'Arial', sans-serif;
  color: var(--text-main); /* Default text color for the page */
  background-color: var(--deep-navy-color); /* Inherited from shared.css body */
  line-height: 1.6;
}

.page-su-kien__hero-section {
  padding: 10px 15px 60px;
  background-color: var(--primary-color);
  background-image: url('[GALLERY:bg:1920x600:abstract_blue_gold_pattern,digital,futuristic,x88pro_event_theme]'); /* Using bg image here */
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 450px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-sizing: border-box;
}

.page-su-kien__hero-content {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 20px;
  background: rgba(16, 35, 63, 0.85); /* Card BG with transparency */
  border-radius: 15px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
  z-index: 1;
}

.page-su-kien__main-title {
  font-size: clamp(2.2rem, 4vw, 3.5rem);
  color: var(--gold-color);
  margin-bottom: 20px;
  font-weight: 700;
  text-shadow: 0 0 15px rgba(242, 193, 78, 0.6);
  line-height: 1.2;
}

.page-su-kien__hero-description {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 30px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.page-su-kien__cta-button {
  display: inline-block;
  padding: 15px 35px;
  background: var(--button-gradient);
  color: var(--text-main);
  text-decoration: none;
  border-radius: 30px;
  font-size: 1.1rem;
  font-weight: 700;
  transition: all 0.3s ease;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
  border: none;
  cursor: pointer;
  max-width: 100%;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-su-kien__cta-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4), 0 0 20px var(--glow-color);
}

.page-su-kien__cta-button--large {
  padding: 18px 45px;
  font-size: 1.25rem;
}

.page-su-kien__section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  color: var(--gold-color);
  text-align: center;
  margin: 60px 0 40px;
  font-weight: 700;
  text-shadow: 0 0 10px rgba(242, 193, 78, 0.4);
}

.page-su-kien__why-join-section,
.page-su-kien__current-events,
.page-su-kien__upcoming-events,
.page-su-kien__how-to-participate,
.page-su-kien__terms-section,
.page-su-kien__faq-section,
.page-su-kien__final-cta {
  padding: 40px 20px;
  max-width: 1200px;
  margin: 0 auto;
  box-sizing: border-box;
}

.page-su-kien__benefits-grid,
.page-su-kien__events-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.page-su-kien__benefit-card,
.page-su-kien__event-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 15px;
  padding: 30px;
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  height: 100%;
  box-sizing: border-box;
}

.page-su-kien__benefit-card:hover,
.page-su-kien__event-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4), 0 0 15px var(--glow-color);
}

.page-su-kien__benefit-icon {
  width: 100px;
  height: 100px;
  object-fit: contain;
  margin-bottom: 20px;
  border-radius: 10px;
  border: 2px solid var(--gold-color);
  padding: 10px;
  background: rgba(242, 193, 78, 0.1);
  max-width: 100%;
  height: auto;
  display: block;
}

.page-su-kien__benefit-title,
.page-su-kien__event-title {
  font-size: 1.5rem;
  color: var(--text-main);
  margin-bottom: 15px;
  font-weight: 600;
  line-height: 1.3;
}

.page-su-kien__benefit-text,
.page-su-kien__event-description {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  flex-grow: 1;
}

.page-su-kien__event-image {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: 10px;
  margin-bottom: 20px;
  border: 1px solid var(--border-color);
  max-width: 100%;
  height: auto;
  display: block;
}

.page-su-kien__event-date {
  font-size: 0.9rem;
  color: var(--gold-color);
  margin-bottom: 10px;
  font-weight: 500;
}

.page-su-kien__event-button {
  display: inline-block;
  padding: 10px 25px;
  background: var(--button-gradient);
  color: var(--text-main);
  text-decoration: none;
  border-radius: 20px;
  font-size: 0.95rem;
  font-weight: 600;
  margin-top: 20px;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  max-width: 100%;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-su-kien__event-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3), 0 0 10px var(--glow-color);
}

.page-su-kien__steps-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.page-su-kien__step-item {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 15px;
  padding: 30px;
  text-align: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  display: flex;
  flex-direction: column;
  align-items: center;
  box-sizing: border-box;
}

.page-su-kien__step-icon {
  width: 120px;
  height: 120px;
  object-fit: contain;
  margin-bottom: 20px;
  border-radius: 50%;
  border: 3px solid var(--gold-color);
  background: rgba(242, 193, 78, 0.15);
  padding: 15px;
  max-width: 100%;
  height: auto;
  display: block;
}

.page-su-kien__step-title {
  font-size: 1.6rem;
  color: var(--gold-color);
  margin-bottom: 10px;
  font-weight: 700;
}

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

.page-su-kien__cta-bottom {
  text-align: center;
  margin-top: 50px;
}

.page-su-kien__terms-intro {
  font-size: 1.1rem;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 30px;
}

.page-su-kien__terms-list {
  list-style: none;
  padding: 0;
  margin: 0 auto;
  max-width: 800px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 15px;
  padding: 30px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.page-su-kien__terms-list li {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 15px;
  padding-left: 25px;
  position: relative;
}

.page-su-kien__terms-list li::before {
  content: '✓';
  color: var(--gold-color);
  position: absolute;
  left: 0;
  font-weight: bold;
}

.page-su-kien__terms-list li:last-child {
  margin-bottom: 0;
}

.page-su-kien__read-more-terms {
  display: block;
  text-align: center;
  margin-top: 30px;
  color: var(--gold-color);
  text-decoration: none;
  font-weight: 600;
  font-size: 1.05rem;
  transition: color 0.3s ease;
}

.page-su-kien__read-more-terms:hover {
  color: var(--glow-color);
  text-decoration: underline;
}

.page-su-kien__faq-container {
  max-width: 900px;
  margin: 40px auto 0;
}

details.page-su-kien__faq-item {
  margin-bottom: 15px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  overflow: hidden;
  background: var(--card-bg);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
}

details.page-su-kien__faq-item summary.page-su-kien__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 25px;
  cursor: pointer;
  user-select: none;
  list-style: none;
  transition: background-color 0.3s ease;
  color: var(--text-main);
  font-weight: 600;
  font-size: 1.1rem;
}

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(--primary-color), 0.7);
}

.page-su-kien__faq-qtext {
  flex: 1;
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.5;
  text-align: left;
}

.page-su-kien__faq-toggle {
  font-size: 24px;
  font-weight: bold;
  color: var(--gold-color);
  flex-shrink: 0;
  margin-left: 15px;
  width: 28px;
  text-align: center;
}

details.page-su-kien__faq-item .page-su-kien__faq-answer {
  padding: 0 25px 25px;
  background: rgba(var(--card-bg), 0.8);
  border-top: 1px solid var(--divider-color);
  border-radius: 0 0 10px 10px;
  color: var(--text-secondary);
  font-size: 1rem;
}

.page-su-kien__faq-answer p {
  margin: 0;
  padding-top: 15px;
}

.page-su-kien__final-cta {
  position: relative;
  text-align: center;
  margin-top: 60px;
  padding: 0;
  overflow: hidden;
  border-radius: 15px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

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

.page-su-kien__cta-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 80%;
  max-width: 800px;
  z-index: 1;
  background: rgba(8, 22, 43, 0.85); /* Deep Navy with transparency */
  padding: 30px 20px;
  border-radius: 15px;
  box-shadow: 0 0 25px rgba(0,0,0,0.5);
}

.page-su-kien__cta-content .page-su-kien__section-title {
  margin-top: 0;
  margin-bottom: 20px;
}

.page-su-kien__cta-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 30px;
}

/* --- Responsive Styles --- */
@media (max-width: 1024px) {
  .page-su-kien__hero-content {
    padding: 30px 15px;
  }

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

  .page-su-kien__section-title {
    margin: 50px 0 30px;
  }

  .page-su-kien__benefits-grid,
  .page-su-kien__events-grid,
  .page-su-kien__steps-container {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
  }

  .page-su-kien__benefit-card,
  .page-su-kien__event-card,
  .page-su-kien__step-item {
    padding: 25px;
  }

  .page-su-kien__faq-qtext {
    font-size: 1rem;
  }

  .page-su-kien__faq-toggle {
    font-size: 22px;
  }
}

@media (max-width: 768px) {
  .page-su-kien__hero-section {
    padding: 10px 10px 40px;
    min-height: 350px;
  }

  .page-su-kien__hero-content {
    padding: 25px 15px;
  }

  .page-su-kien__main-title {
    font-size: clamp(1.8rem, 7vw, 2.5rem);
    margin-bottom: 15px;
  }

  .page-su-kien__hero-description {
    font-size: 1rem;
    margin-bottom: 25px;
  }

  .page-su-kien__cta-button {
    padding: 12px 25px;
    font-size: 1rem;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
  }

  .page-su-kien__cta-button--large {
    padding: 15px 30px;
    font-size: 1.1rem;
  }

  .page-su-kien__section-title {
    font-size: clamp(1.6rem, 6vw, 2.2rem);
    margin: 40px 0 25px;
  }

  .page-su-kien__why-join-section,
  .page-su-kien__current-events,
  .page-su-kien__upcoming-events,
  .page-su-kien__how-to-participate,
  .page-su-kien__terms-section,
  .page-su-kien__faq-section,
  .page-su-kien__final-cta {
    padding: 20px 15px;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .page-su-kien__benefits-grid,
  .page-su-kien__events-grid,
  .page-su-kien__steps-container {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .page-su-kien__benefit-card,
  .page-su-kien__event-card,
  .page-su-kien__step-item {
    padding: 20px;
  }

  .page-su-kien__benefit-icon {
    width: 80px;
    height: 80px;
    margin-bottom: 15px;
  }

  .page-su-kien__benefit-title,
  .page-su-kien__event-title {
    font-size: 1.3rem;
    margin-bottom: 10px;
  }

  .page-su-kien__benefit-text,
  .page-su-kien__event-description {
    font-size: 0.95rem;
  }

  .page-su-kien__event-image {
    height: 180px;
    margin-bottom: 15px;
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }

  .page-su-kien__event-button {
    padding: 8px 20px;
    font-size: 0.9rem;
    margin-top: 15px;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
  }

  .page-su-kien__step-icon {
    width: 100px;
    height: 100px;
    margin-bottom: 15px;
  }

  .page-su-kien__step-title {
    font-size: 1.4rem;
  }

  .page-su-kien__step-text {
    font-size: 0.95rem;
  }

  .page-su-kien__terms-intro {
    font-size: 1rem;
    margin-bottom: 20px;
  }

  .page-su-kien__terms-list {
    padding: 20px;
  }

  .page-su-kien__terms-list li {
    font-size: 0.95rem;
    margin-bottom: 10px;
    padding-left: 20px;
  }

  details.page-su-kien__faq-item summary.page-su-kien__faq-question {
    padding: 15px 20px;
    font-size: 1rem;
  }
  
  .page-su-kien__faq-qtext {
    font-size: 1rem;
  }

  .page-su-kien__faq-toggle {
    font-size: 20px;
    width: 24px;
    height: 24px;
  }

  details.page-su-kien__faq-item .page-su-kien__faq-answer {
    padding: 0 20px 20px;
  }

  .page-su-kien__cta-content {
    width: 90%;
    padding: 20px 15px;
  }

  .page-su-kien__cta-description {
    font-size: 1rem;
    margin-bottom: 20px;
  }

  /* General image and container responsive styles */
  .page-su-kien img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }
  
  .page-su-kien__hero-section,
  .page-su-kien__why-join-section,
  .page-su-kien__current-events,
  .page-su-kien__upcoming-events,
  .page-su-kien__how-to-participate,
  .page-su-kien__terms-section,
  .page-su-kien__faq-section,
  .page-su-kien__final-cta,
  .page-su-kien__cta-bottom {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }
  
  /* Buttons within containers */
  .page-su-kien__cta-bottom .page-su-kien__cta-button {
    max-width: 100% !important;
    width: 100% !important;
  }
}