.page-register {
  --primary-color: #11A84E;
  --secondary-color: #22C768;
  --bg-color: #08160F;
  --card-bg: #11271B;
  --text-main: #F2FFF6;
  --text-secondary: #A7D9B8;
  --border-color: #2E7A4E;
  --button-gradient: linear-gradient(180deg, #2AD16F 0%, #13994A 100%);
  --glow-color: #57E38D;
  --gold-color: #F2C14E;
  --divider-color: #1E3A2A;
  --deep-green: #0A4B2C;

  color: var(--text-main); /* Default text color for dark body background */
  background-color: var(--bg-color);
  font-family: 'Arial', sans-serif;
  line-height: 1.6;
  font-size: 16px;
}

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

.page-register__section-title {
  font-size: 2.5em;
  color: var(--gold-color);
  text-align: center;
  margin-bottom: 20px;
  font-weight: bold;
  line-height: 1.2;
  letter-spacing: 0.05em;
}

.page-register__section-description {
  font-size: 1.1em;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 40px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

/* Hero Section */
.page-register__hero-section {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 20px;
  overflow: hidden;
  padding-top: 10px; /* Small top padding, body handles --header-offset */
}

.page-register__hero-image-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.page-register__hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.4); /* Darken image for text readability */
}

.page-register__hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  padding: 20px;
  background: rgba(0, 0, 0, 0.4); /* Semi-transparent background for text */
  border-radius: 10px;
}

.page-register__hero-title {
  font-size: 3em;
  color: var(--gold-color);
  margin-bottom: 20px;
  font-weight: bold;
  line-height: 1.2;
  text-shadow: 0 0 15px rgba(87, 227, 141, 0.7);
}

.page-register__hero-description {
  font-size: 1.3em;
  color: var(--text-main);
  margin-bottom: 40px;
}

.page-register__cta-button {
  display: inline-block;
  background: var(--button-gradient);
  color: #ffffff;
  padding: 15px 40px;
  border-radius: 50px;
  text-decoration: none;
  font-size: 1.2em;
  font-weight: bold;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3), 0 0 20px var(--glow-color);
}

.page-register__cta-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4), 0 0 30px var(--glow-color);
}

.page-register__cta-button--large {
  font-size: 1.5em;
  padding: 20px 50px;
}

/* Why Register Section */
.page-register__why-register-section {
  padding: 80px 0;
  background-color: var(--bg-color);
}

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

.page-register__feature-card {
  background-color: var(--card-bg);
  padding: 30px;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color);
  transition: transform 0.3s ease;
}

.page-register__feature-card:hover {
  transform: translateY(-5px);
}

.page-register__feature-icon {
  width: 100%;
  max-width: 250px;
  height: auto;
  margin-bottom: 20px;
  border-radius: 8px;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.page-register__card-title {
  font-size: 1.5em;
  color: var(--primary-color);
  margin-bottom: 15px;
  font-weight: bold;
}

.page-register__card-text {
  color: var(--text-secondary);
  font-size: 1em;
}

/* Process Guide Section */
.page-register__process-guide-section {
  padding: 80px 0;
  background-color: var(--deep-green);
}

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

.page-register__step-card {
  background-color: var(--card-bg);
  padding: 30px;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color);
}

.page-register__step-number {
  width: 60px;
  height: 60px;
  line-height: 60px;
  background: var(--button-gradient);
  border-radius: 50%;
  font-size: 2em;
  font-weight: bold;
  color: #ffffff;
  margin: 0 auto 20px;
  box-shadow: 0 0 10px var(--glow-color);
}

.page-register__process-image-wrapper {
  margin-top: 50px;
  text-align: center;
}

.page-register__process-image {
  max-width: 100%;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

/* Benefits & Features Section */
.page-register__benefits-features-section {
  padding: 80px 0;
  background-color: var(--bg-color);
}

.page-register__benefits-list {
  list-style: none;
  padding: 0;
  margin-top: 40px;
  text-align: left;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.page-register__benefits-list li {
  background-color: var(--card-bg);
  padding: 20px;
  margin-bottom: 15px;
  border-radius: 8px;
  border-left: 5px solid var(--primary-color);
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.15);
  color: var(--text-main);
  font-size: 1.1em;
}

.page-register__benefits-list li strong {
  color: var(--gold-color);
}

.page-register__promo-image-wrapper {
  margin-top: 50px;
  text-align: center;
}

.page-register__promo-image {
  max-width: 100%;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

/* Security & Trust Section */
.page-register__security-trust-section {
  padding: 80px 0;
  background-color: var(--deep-green);
}

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

.page-register__security-item {
  background-color: var(--card-bg);
  padding: 30px;
  border-radius: 10px;
  text-align: left;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color);
}

.page-register__item-title {
  font-size: 1.4em;
  color: var(--primary-color);
  margin-bottom: 10px;
  font-weight: bold;
}

.page-register__item-text {
  color: var(--text-secondary);
  font-size: 1em;
}

.page-register__security-image-wrapper {
  margin-top: 50px;
  text-align: center;
}

.page-register__security-image {
  max-width: 100%;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

/* FAQ Section */
.page-register__faq-section {
  padding: 80px 0;
  background-color: var(--bg-color);
}

.page-register__faq-list {
  margin-top: 40px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.page-register__faq-item {
  background-color: var(--card-bg);
  margin-bottom: 15px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.15);
  overflow: hidden;
}

.page-register__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  font-size: 1.2em;
  font-weight: bold;
  color: var(--text-main);
  cursor: pointer;
  background-color: var(--deep-green);
  border-bottom: 1px solid var(--divider-color);
  list-style: none; /* For details/summary */
}

.page-register__faq-question::-webkit-details-marker {
  display: none;
}

.page-register__faq-qtext {
  flex-grow: 1;
  text-align: left;
}

.page-register__faq-toggle {
  font-size: 1.5em;
  margin-left: 15px;
  color: var(--gold-color);
}

.page-register__faq-answer {
  padding: 20px;
  padding-top: 0;
  font-size: 1em;
  color: var(--text-secondary);
  text-align: left;
}

.page-register__faq-item[open] .page-register__faq-question {
  border-bottom: 1px solid var(--divider-color);
}

/* CTA Bottom Section */
.page-register__cta-bottom-section {
  padding: 80px 0;
  background-color: var(--deep-green);
  text-align: center;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .page-register__hero-title {
    font-size: 2.5em;
  }
  .page-register__hero-description {
    font-size: 1.1em;
  }
  .page-register__section-title {
    font-size: 2em;
  }
  .page-register__cta-button {
    padding: 12px 30px;
    font-size: 1.1em;
  }
  .page-register__cta-button--large {
    font-size: 1.3em;
    padding: 15px 40px;
  }
}

@media (max-width: 768px) {
  .page-register {
    font-size: 15px;
  }
  .page-register__hero-section {
    padding: 60px 15px;
    padding-top: 10px;
  }
  .page-register__hero-title {
    font-size: 2em;
  }
  .page-register__hero-description {
    font-size: 1em;
  }
  .page-register__section-title {
    font-size: 1.8em;
  }
  .page-register__section-description {
    font-size: 0.95em;
    margin-bottom: 30px;
  }
  .page-register__cta-button, .page-register a[class*="button"], .page-register 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;
  }
  .page-register__cta-button--large {
    font-size: 1.2em;
    padding: 15px 30px;
  }
  .page-register__features-grid, .page-register__process-steps, .page-register__security-points {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .page-register__container,
  .page-register__section,
  .page-register__card {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }
  .page-register img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    display: block !important;
  }
  .page-register__video-section {
    padding-top: 10px !important; /* body đã xử lý --header-offset */
  }
  .page-register__faq-question {
    font-size: 1.1em;
    padding: 15px;
  }
  .page-register__faq-answer {
    padding: 15px;
    padding-top: 0;
  }
  .page-register__why-register-section,
  .page-register__process-guide-section,
  .page-register__benefits-features-section,
  .page-register__security-trust-section,
  .page-register__faq-section,
  .page-register__cta-bottom-section {
    padding: 40px 0;
  }
}

@media (max-width: 480px) {
  .page-register__hero-title {
    font-size: 1.8em;
  }
  .page-register__hero-description {
    font-size: 0.9em;
  }
  .page-register__section-title {
    font-size: 1.6em;
  }
  .page-register__cta-button {
    font-size: 1em;
    padding: 10px 20px;
  }
  .page-register__cta-button--large {
    font-size: 1.1em;
    padding: 12px 25px;
  }
  .page-register__feature-card, .page-register__step-card, .page-register__security-item {
    padding: 20px;
  }
  .page-register__card-title, .page-register__item-title {
    font-size: 1.3em;
  }
  .page-register__step-number {
    width: 50px;
    height: 50px;
    line-height: 50px;
    font-size: 1.8em;
  }
}