.page-register {
  padding-top: var(--header-offset, 120px); /* Ensure space for fixed header */
  background-color: #0a0a0a; /* Explicitly set main content background to dark */
  color: #ffffff; /* Explicitly set main content text to light */
  font-family: 'Arial', sans-serif;
  line-height: 1.6;
}

.page-register__hero-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 60px 20px;
  background-color: #0a0a0a;
  color: #ffffff;
}

.page-register__hero-content {
  max-width: 800px;
  margin-bottom: 40px;
}

.page-register__hero-title {
  font-size: 3.2em;
  margin-bottom: 20px;
  color: #26A9E0;
  line-height: 1.2;
}

.page-register__hero-description {
  font-size: 1.1em;
  margin-bottom: 30px;
  color: #f0f0f0;
}

.page-register__hero-image-wrapper {
  width: 100%;
  max-width: 1200px;
}

.page-register__hero-image {
  width: 100%;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
}

.page-register__section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 20px;
  background-color: #0a0a0a;
  color: #ffffff;
}

.page-register__section-title {
  font-size: 2.5em;
  text-align: center;
  margin-bottom: 25px;
  color: #26A9E0;
  position: relative;
  padding-bottom: 15px;
}

.page-register__section-title::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background-color: #26A9E0;
  border-radius: 2px;
}

.page-register__section-description {
  font-size: 1.1em;
  text-align: center;
  max-width: 900px;
  margin: 0 auto 50px auto;
  color: #f0f0f0;
}

.page-register__sub-title {
  font-size: 1.8em;
  color: #26A9E0;
  margin-top: 40px;
  margin-bottom: 20px;
  text-align: left;
}

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

.page-register__feature-card, .page-register__promo-card {
  background-color: rgba(255, 255, 255, 0.05);
  border-radius: 10px;
  padding: 30px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  color: #ffffff;
}

.page-register__feature-card:hover, .page-register__promo-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 12px 25px rgba(0, 0, 0, 0.5);
}

.page-register__feature-card-title, .page-register__promo-card-title {
  font-size: 1.5em;
  color: #26A9E0;
  margin-bottom: 15px;
}

.page-register__feature-list, .page-register__info-list, .page-register__security-list {
  list-style: disc;
  padding-left: 25px;
  margin-top: 15px;
  color: #f0f0f0;
}

.page-register__feature-list li, .page-register__info-list li, .page-register__security-list li {
  margin-bottom: 10px;
}

.page-register__image-full-width {
  width: 100%;
  height: auto;
  border-radius: 10px;
  margin-top: 40px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.page-register__video-wrapper {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
  height: 0;
  overflow: hidden;
  margin: 40px 0;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.page-register__video-player {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
  border-radius: 10px;
}

.page-register__step-list {
  counter-reset: step-counter;
  list-style: none;
  padding: 0;
  margin-top: 30px;
}

.page-register__step-item {
  background-color: rgba(255, 255, 255, 0.07);
  border-left: 5px solid #26A9E0;
  padding: 25px 30px;
  margin-bottom: 20px;
  border-radius: 8px;
  position: relative;
  color: #ffffff;
}

.page-register__step-item::before {
  counter-increment: step-counter;
  content: "Bước " counter(step-counter);
  position: absolute;
  left: -5px;
  top: 0;
  background-color: #26A9E0;
  color: #ffffff;
  padding: 5px 15px;
  border-top-left-radius: 8px;
  border-bottom-right-radius: 8px;
  font-weight: bold;
  font-size: 0.9em;
}

.page-register__step-title {
  font-size: 1.6em;
  color: #26A9E0;
  margin-bottom: 10px;
  padding-top: 15px; /* Space for step number */
}

.page-register__image-center {
  display: block;
  margin: 40px auto;
  max-width: 100%;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.page-register__security-content {
  display: flex;
  gap: 40px;
  align-items: flex-start;
  margin-top: 40px;
}

.page-register__security-text {
  flex: 2;
}

.page-register__security-image-wrapper {
  flex: 1;
  min-width: 300px;
}

.page-register__security-image {
  width: 100%;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.page-register__faq-list {
  margin-top: 40px;
}

.page-register__faq-item {
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  margin-bottom: 15px;
  overflow: hidden;
  color: #ffffff;
}

.page-register__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 25px;
  font-size: 1.2em;
  font-weight: bold;
  cursor: pointer;
  color: #ffffff;
  transition: background-color 0.3s ease;
}

.page-register__faq-question:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.page-register__faq-toggle {
  font-size: 1.5em;
  line-height: 1;
  transition: transform 0.3s ease;
}

.page-register__faq-item.active .page-register__faq-toggle {
  transform: rotate(0deg);
}

.page-register__faq-answer {
  max-height: 0;
  overflow: hidden;
  padding: 0 25px;
  transition: max-height 0.3s ease, padding 0.3s ease;
  color: #f0f0f0;
}

.page-register__faq-item.active .page-register__faq-answer {
  max-height: 1000px !important; /* Sufficiently large to show content */
  padding: 15px 25px 25px 25px;
}

.page-register__faq-answer p {
  margin: 0;
  padding: 0;
  color: #f0f0f0;
}

.page-register__cta-section {
  text-align: center;
  padding: 80px 20px;
  background-color: #0a0a0a;
  color: #ffffff;
}

.page-register__btn-primary,
.page-register__btn-secondary {
  display: inline-block;
  padding: 15px 30px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: bold;
  font-size: 1.1em;
  transition: all 0.3s ease;
  cursor: pointer;
  text-align: center;
  box-sizing: border-box;
  max-width: 100%;
  white-space: normal;
  word-wrap: break-word;
}

.page-register__btn-primary {
  background-color: #26A9E0;
  color: #ffffff;
  border: 2px solid #26A9E0;
}

.page-register__btn-primary:hover {
  background-color: #1e87b8;
  border-color: #1e87b8;
}

.page-register__btn-secondary {
  background-color: transparent;
  color: #26A9E0;
  border: 2px solid #26A9E0;
}

.page-register__btn-secondary:hover {
  background-color: #26A9E0;
  color: #ffffff;
}

.page-register__btn-large {
  padding: 18px 40px;
  font-size: 1.2em;
  margin-top: 30px;
}

/* Responsive adjustments */
@media (max-width: 1024px) {
  .page-register__hero-title {
    font-size: 2.8em;
  }
  .page-register__section-title {
    font-size: 2em;
  }
  .page-register__security-content {
    flex-direction: column;
    align-items: center;
  }
  .page-register__security-text, .page-register__security-image-wrapper {
    flex: none;
    width: 100%;
    max-width: 700px; /* Constrain width for better readability on tablets */
  }
}

@media (max-width: 768px) {
  .page-register {
    font-size: 16px;
    line-height: 1.6;
  }
  .page-register__hero-section, .page-register__section, .page-register__cta-section {
    padding: 40px 15px;
  }
  .page-register__hero-title {
    font-size: 2.2em;
  }
  .page-register__section-title {
    font-size: 1.8em;
  }
  .page-register__hero-content {
    margin-bottom: 30px;
  }
  .page-register__feature-grid, .page-register__promo-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .page-register__feature-card, .page-register__promo-card {
    padding: 25px;
  }
  .page-register__sub-title {
    font-size: 1.5em;
  }
  .page-register__step-item {
    padding: 20px 25px;
  }
  .page-register__step-title {
    font-size: 1.3em;
    padding-top: 10px;
  }
  .page-register__faq-question {
    font-size: 1.1em;
    padding: 15px 20px;
  }
  .page-register__faq-answer {
    padding: 10px 20px 20px 20px;
  }
  .page-register__btn-primary, .page-register__btn-secondary, .page-register__btn-large {
    display: block;
    width: 100%;
    margin-left: 0;
    margin-right: 0;
    margin-bottom: 15px;
    max-width: 100% !important;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
  }
  .page-register__promo-grid, .page-register__feature-grid {
    flex-wrap: wrap !important;
    gap: 15px;
  }

  /* Image and Video responsive rules */
  .page-register img {
    max-width: 100% !important;
    height: auto !important;
    display: block !important;
  }
  .page-register__hero-image-wrapper,
  .page-register__image-full-width,
  .page-register__image-center,
  .page-register__security-image-wrapper,
  .page-register__video-wrapper {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    overflow: hidden !important;
    padding-left: 15px;
    padding-right: 15px;
  }
  .page-register__video-player {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }
}

@media (max-width: 480px) {
  .page-register__hero-title {
    font-size: 1.8em;
  }
  .page-register__section-title {
    font-size: 1.5em;
  }
  .page-register__feature-card-title, .page-register__promo-card-title {
    font-size: 1.3em;
  }
  .page-register__faq-question {
    font-size: 1em;
    padding: 12px 15px;
  }
  .page-register__faq-answer {
    padding: 8px 15px 15px 15px;
  }
  .page-register__btn-primary, .page-register__btn-secondary, .page-register__btn-large {
    font-size: 1em;
    padding: 12px 20px;
  }
}