:root {
  --main-color: #11A84E;
  --accent-color: #22C768;
  --button-gradient: linear-gradient(180deg, #2AD16F 0%, #13994A 100%);
  --card-bg: #11271B;
  --background: #08160F;
  --text-main: #F2FFF6;
  --text-secondary: #A7D9B8;
  --border-color: #2E7A4E;
  --glow: #57E38D;
  --gold: #F2C14E;
  --divider: #1E3A2A;
  --deep-green: #0A4B2C;
  --main-color-rgb: 17, 168, 78; /* RGB for #11A84E for rgba usage */
}

/* body đã padding-top: var(--header-offset) từ shared.css; trang này không cần thêm */

/* --- General Styles for page-register --- */
.page-register {
  color: var(--text-main); /* #F2FFF6 */
  background: var(--background); /* #08160F */
  font-family: Arial, sans-serif;
  line-height: 1.6;
}

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

/* Ensure all images are responsive by default */
.page-register img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Ensure all videos are responsive by default */
.page-register video,
.page-register__video {
  max-width: 100%;
  width: 100%;
  height: auto;
  display: block;
}

/* Ensure video containers are responsive */
.page-register__video-section,
.page-register__video-container,
.page-register__video-wrapper {
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  overflow: hidden; /* Prevent video overflow */
}

/* Ensure all buttons are responsive by default */
.page-register__cta-button,
.page-register__btn-primary,
.page-register__btn-secondary,
.page-register a[class*="button"],
.page-register a[class*="btn"] {
  max-width: 100%;
  box-sizing: border-box;
  white-space: normal; /* Allow text to wrap */
  word-wrap: break-word; /* Break long words */
  text-align: center;
  text-decoration: none;
  padding: 12px 25px;
  border-radius: 8px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
}

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

.page-register__hero-image-wrapper {
  width: 100%;
  max-height: 500px; /* Limit height for hero image */
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}

.page-register__hero-image {
  width: 100%;
  height: auto;
  object-fit: cover;
  min-height: 200px; /* Ensure minimum size */
}

.page-register__hero-content {
  text-align: center;
  padding: 40px 20px;
  max-width: 900px;
  position: relative; /* Ensure content is above any potential background */
  z-index: 1;
}

.page-register__main-title {
  font-size: clamp(2rem, 5vw, 3.5rem); /* Responsive font size */
  color: var(--text-main); /* #F2FFF6 */
  margin-bottom: 20px;
  line-height: 1.2;
  font-weight: bold;
}

.page-register__intro-text {
  font-size: 1.1rem;
  color: var(--text-secondary); /* #A7D9B8 */
  margin-bottom: 30px;
}

.page-register__cta-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap; /* Allow buttons to wrap on smaller screens */
}

.page-register__btn-primary {
  background: var(--button-gradient);
  color: #ffffff;
  border: none;
}

.page-register__btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
}

.page-register__btn-secondary {
  background: transparent;
  color: var(--main-color); /* #11A84E */
  border: 2px solid var(--main-color); /* #11A84E */
}

.page-register__btn-secondary:hover {
  background: var(--main-color); /* #11A84E */
  color: #ffffff;
  transform: translateY(-2px);
}

/* --- Section Titles & Descriptions --- */
.page-register__section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  color: var(--text-main); /* #F2FFF6 */
  text-align: center;
  margin-bottom: 20px;
  font-weight: bold;
}

.page-register__section-description {
  font-size: 1rem;
  color: var(--text-secondary); /* #A7D9B8 */
  text-align: center;
  max-width: 800px;
  margin: 0 auto 40px auto;
}

/* --- Dark Section Background --- */
.page-register__dark-section {
  background: var(--deep-green); /* #0A4B2C */
  padding: 60px 0;
}

/* --- Why Register Section --- */
.page-register__why-register-section {
  padding-bottom: 60px;
}

.page-register__features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  padding: 20px 0;
}

.page-register__feature-card {
  background: var(--card-bg); /* #11271B */
  padding: 30px;
  border-radius: 12px;
  text-align: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s ease;
  border: 1px solid var(--border-color); /* #2E7A4E */
  color: var(--text-main); /* #F2FFF6 */
}

.page-register__feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.page-register__feature-icon {
  width: 100%;
  max-width: 120px;
  height: auto;
  margin: 0 auto 20px auto;
  border-radius: 8px; /* Slightly rounded for icons */
  min-width: 200px; /* Enforce min image size */
  min-height: 200px; /* Enforce min image size */
  object-fit: cover;
}

.page-register__card-title {
  font-size: 1.5rem;
  color: var(--text-main); /* #F2FFF6 */
  margin-bottom: 15px;
  font-weight: bold;
}

.page-register__card-text {
  font-size: 0.95rem;
  color: var(--text-secondary); /* #A7D9B8 */
}

/* --- How to Register Section --- */
.page-register__how-to-register-section {
  padding: 60px 0;
  background: var(--background); /* #08160F */
}

.page-register__steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  padding: 20px 0;
}

.page-register__step-card {
  background: var(--card-bg); /* #11271B */
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color); /* #2E7A4E */
  color: var(--text-main); /* #F2FFF6 */
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.page-register__step-number {
  background: var(--main-color); /* #11A84E */
  color: #ffffff;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.8rem;
  font-weight: bold;
  margin-bottom: 20px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.page-register__step-image {
  width: 100%;
  max-width: 400px;
  height: auto;
  margin-top: 20px;
  border-radius: 8px;
  object-fit: cover;
  min-width: 200px; /* Enforce min image size */
  min-height: 200px; /* Enforce min image size */
}

.page-register__tips-section {
  background: var(--card-bg); /* #11271B */
  padding: 30px;
  border-radius: 12px;
  margin-top: 40px;
  border: 1px solid var(--border-color); /* #2E7A4E */
}

.page-register__sub-title {
  font-size: 1.6rem;
  color: var(--gold); /* #F2C14E */
  margin-bottom: 20px;
  text-align: center;
}

.page-register__bullet-list {
  list-style: none;
  padding: 0;
  margin: 0;
  text-align: left;
}

.page-register__bullet-list li {
  color: var(--text-secondary); /* #A7D9B8 */
  margin-bottom: 10px;
  padding-left: 25px;
  position: relative;
  font-size: 1rem;
}

.page-register__bullet-list li strong {
  color: var(--text-main); /* #F2FFF6 */
}

.page-register__bullet-list li::before {
  content: '✓';
  color: var(--glow); /* #57E38D */
  position: absolute;
  left: 0;
  font-weight: bold;
}

/* --- Security Section --- */
.page-register__security-section {
  padding-top: 60px;
}

.page-register__security-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  padding: 20px 0;
}

.page-register__security-item {
  background: var(--card-bg); /* #11271B */
  padding: 30px;
  border-radius: 12px;
  text-align: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color); /* #2E7A4E */
  color: var(--text-main); /* #F2FFF6 */
}

.page-register__security-icon {
  width: 100%;
  max-width: 100px;
  height: auto;
  margin: 0 auto 20px auto;
  border-radius: 8px;
  min-width: 200px; /* Enforce min image size */
  min-height: 200px; /* Enforce min image size */
  object-fit: cover;
}

/* --- FAQ Section --- */
.page-register__faq-section {
  padding: 60px 0;
  background: var(--background); /* #08160F */
}

.page-register__faq-list {
  max-width: 900px;
  margin: 40px auto 0 auto;
}

.page-register__faq-item {
  background: var(--card-bg); /* #11271B */
  border: 1px solid var(--border-color); /* #2E7A4E */
  border-radius: 12px;
  margin-bottom: 15px;
  overflow: hidden;
  color: var(--text-main); /* #F2FFF6 */
}

.page-register__faq-item summary {
  list-style: none; /* Hide default marker */
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 25px;
  font-size: 1.1rem;
  font-weight: bold;
  cursor: pointer;
  outline: none;
  color: var(--text-main); /* #F2FFF6 */
  transition: background-color 0.3s ease;
}

.page-register__faq-item summary::-webkit-details-marker {
  display: none; /* Hide default marker for webkit */
}

.page-register__faq-item summary:hover {
  background-color: rgba(var(--main-color-rgb), 0.1); /* Light hover effect */
}

.page-register__faq-qtext {
  flex-grow: 1;
  color: var(--text-main); /* #F2FFF6 */
}

.page-register__faq-toggle {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--glow); /* #57E38D */
  margin-left: 15px;
  pointer-events: none; /* Ensure click goes to summary */
}

.page-register__faq-answer {
  padding: 0 25px 20px 25px;
  font-size: 1rem;
  color: var(--text-secondary); /* #A7D9B8 */
}

.page-register__faq-answer p {
  margin: 0;
}

/* --- CTA Section --- */
.page-register__cta-section {
  padding-top: 60px;
  padding-bottom: 60px;
  text-align: center;
}

/* --- Responsive Adjustments --- */
@media (max-width: 1024px) {
  .page-register__main-title {
    font-size: clamp(1.8rem, 4.5vw, 3rem);
  }

  .page-register__section-title {
    font-size: clamp(1.6rem, 3.5vw, 2.5rem);
  }

  .page-register__hero-content {
    padding: 30px 15px;
  }
}

@media (max-width: 768px) {
  .page-register {
    font-size: 16px;
    line-height: 1.6;
  }

  /* Mobile image adaptation */
  .page-register img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }

  /* Mobile video adaptation */
  .page-register video,
  .page-register__video {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    display: block !important;
  }

  /* Video containers mobile adaptation */
  .page-register__video-section,
  .page-register__video-container,
  .page-register__video-wrapper {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
    overflow: hidden !important;
  }
  
  /* Video section small top padding for mobile */
  .page-register__video-section {
    padding-top: 10px !important;
  }

  /* Mobile button adaptation */
  .page-register__cta-button,
  .page-register__btn-primary,
  .page-register__btn-secondary,
  .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;
  }

  /* Button containers mobile adaptation */
  .page-register__cta-buttons,
  .page-register__button-group,
  .page-register__btn-container {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
    flex-direction: column; /* Stack buttons vertically */
    gap: 15px; /* Space between stacked buttons */
  }

  .page-register__container {
    padding: 0 15px;
  }

  .page-register__hero-content {
    padding: 20px 15px;
  }

  .page-register__main-title {
    font-size: clamp(1.5rem, 6vw, 2.5rem);
  }

  .page-register__intro-text {
    font-size: 1rem;
  }

  .page-register__section-title {
    font-size: clamp(1.4rem, 5vw, 2rem);
  }

  .page-register__section-description {
    font-size: 0.95rem;
  }

  .page-register__dark-section,
  .page-register__how-to-register-section,
  .page-register__security-section,
  .page-register__faq-section,
  .page-register__cta-section {
    padding: 40px 0;
  }

  .page-register__feature-card,
  .page-register__step-card,
  .page-register__security-item {
    padding: 20px;
  }

  .page-register__card-title {
    font-size: 1.3rem;
  }

  .page-register__card-text {
    font-size: 0.9rem;
  }

  .page-register__faq-item summary {
    font-size: 1rem;
    padding: 15px 20px;
  }

  .page-register__faq-answer {
    padding: 0 20px 15px 20px;
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  .page-register__hero-image-wrapper {
    max-height: 300px;
  }
}