:root {
  --tk88-primary: #11A84E;
  --tk88-secondary: #22C768;
  --tk88-btn-gradient: linear-gradient(180deg, #2AD16F 0%, #13994A 100%);
  --tk88-card-bg: #11271B;
  --tk88-bg: #08160F;
  --tk88-text-main: #F2FFF6;
  --tk88-text-secondary: #A7D9B8;
  --tk88-border: #2E7A4E;
  --tk88-glow: #57E38D;
  --tk88-gold: #F2C14E;
  --tk88-divider: #1E3A2A;
  --tk88-deep-green: #0A4B2C;
}

.page-register {
  background-color: var(--tk88-bg);
  color: var(--tk88-text-main);
  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;
}

/* Hero Section */
.page-register__hero-section {
  position: relative;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 10px 0 60px 0; /* body handles header offset, this is for visual top padding */
  text-align: center;
  overflow: hidden;
}

.page-register__hero-image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
  filter: brightness(0.7);
}

.page-register__hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
  padding: 40px 20px;
  background: rgba(0, 0, 0, 0.4); /* Dark overlay for text readability */
  border-radius: 10px;
  margin-top: 100px; /* Adjust as needed for visual separation */
}

.page-register__main-title {
  font-size: clamp(2em, 4vw, 3.5em);
  color: var(--tk88-gold);
  margin-bottom: 20px;
  font-weight: 700;
  line-height: 1.2;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.page-register__description {
  font-size: clamp(1em, 1.5vw, 1.25em);
  color: var(--tk88-text-main);
  margin-bottom: 30px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* Section Titles and Descriptions */
.page-register__section-title {
  font-size: clamp(1.8em, 3vw, 2.8em);
  color: var(--tk88-gold);
  text-align: center;
  margin-bottom: 20px;
  font-weight: 700;
}

.page-register__section-description {
  font-size: clamp(1em, 1.2vw, 1.1em);
  color: var(--tk88-text-secondary);
  text-align: center;
  margin-bottom: 40px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.page-register__sub-title {
  font-size: clamp(1.4em, 2vw, 2em);
  color: var(--tk88-text-main);
  margin-top: 30px;
  margin-bottom: 15px;
  font-weight: 600;
}

/* Buttons */
.page-register__btn-primary {
  display: inline-block;
  padding: 15px 30px;
  background: var(--tk88-btn-gradient);
  color: var(--tk88-text-main);
  text-decoration: none;
  border-radius: 8px;
  font-weight: 700;
  font-size: 1.1em;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  max-width: 100%;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-register__btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
  opacity: 0.9;
}

.page-register__text-link {
  color: var(--tk88-secondary);
  text-decoration: none;
  transition: color 0.3s ease;
}

.page-register__text-link:hover {
  color: var(--tk88-glow);
  text-decoration: underline;
}

/* Form Section */
.page-register__form-section {
  padding: 60px 0;
  background-color: var(--tk88-bg);
}

.page-register__registration-form {
  background-color: var(--tk88-card-bg);
  padding: 40px;
  border-radius: 10px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.5);
  max-width: 600px;
  margin: 0 auto;
  border: 1px solid var(--tk88-border);
}

.page-register__form-group {
  margin-bottom: 20px;
}

.page-register__form-label {
  display: block;
  margin-bottom: 8px;
  color: var(--tk88-text-secondary);
  font-weight: 600;
}

.page-register__form-input {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid var(--tk88-border);
  border-radius: 5px;
  background-color: var(--tk88-deep-green);
  color: var(--tk88-text-main);
  font-size: 1em;
  box-sizing: border-box;
}

.page-register__form-input::placeholder {
  color: var(--tk88-text-secondary);
  opacity: 0.7;
}

.page-register__form-input:focus {
  outline: none;
  border-color: var(--tk88-secondary);
  box-shadow: 0 0 0 2px rgba(34, 199, 104, 0.5);
}

.page-register__form-checkbox-group {
  display: flex;
  align-items: center;
  margin-bottom: 25px;
}

.page-register__form-checkbox {
  margin-right: 10px;
  width: 18px;
  height: 18px;
  accent-color: var(--tk88-secondary);
}

.page-register__form-checkbox-label {
  color: var(--tk88-text-secondary);
  font-size: 0.95em;
}

.page-register__submit-button {
  width: 100%;
  padding: 15px 20px;
  font-size: 1.2em;
}

.page-register__login-prompt {
  text-align: center;
  margin-top: 25px;
  color: var(--tk88-text-secondary);
}

/* Benefits Section */
.page-register__benefits-section {
  padding: 60px 0;
  background-color: var(--tk88-deep-green);
}

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

.page-register__benefit-card {
  background-color: var(--tk88-card-bg);
  padding: 30px;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
  border: 1px solid var(--tk88-border);
  transition: transform 0.3s ease;
  color: var(--tk88-text-main);
}

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

.page-register__benefit-icon {
  width: 100%;
  max-width: 250px;
  height: auto;
  display: block;
  margin: 0 auto 20px auto;
  border-radius: 8px;
}

.page-register__benefit-title {
  font-size: 1.5em;
  color: var(--tk88-gold);
  margin-bottom: 10px;
  font-weight: 700;
}

.page-register__benefit-text {
  font-size: 0.95em;
  color: var(--tk88-text-secondary);
}

/* Why Register Section */
.page-register__why-register {
  padding: 60px 0;
  background-color: var(--tk88-bg);
}

.page-register__why-register-content {
  display: flex;
  flex-direction: row;
  gap: 40px;
  align-items: center;
  margin-top: 40px;
}

.page-register__text-block {
  flex: 1;
}

.page-register__text-block p {
  margin-bottom: 15px;
  color: var(--tk88-text-secondary);
}

.page-register__why-register-image {
  flex: 1;
  width: 100%;
  height: auto;
  display: block;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.page-register__closing-text {
  text-align: center;
  font-size: 1.1em;
  color: var(--tk88-text-main);
  margin-top: 50px;
  margin-bottom: 30px;
  font-weight: 500;
}

.page-register__cta-button {
  margin: 0 auto;
  display: block;
  width: fit-content;
}

/* FAQ Section */
.page-register__faq-section {
  padding: 60px 0;
  background-color: var(--tk88-deep-green);
}

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

.page-register__faq-item {
  background-color: var(--tk88-card-bg);
  border: 1px solid var(--tk88-border);
  border-radius: 8px;
  margin-bottom: 15px;
  overflow: hidden;
  color: var(--tk88-text-main);
}

.page-register__faq-item summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 25px;
  cursor: pointer;
  font-weight: 600;
  font-size: 1.1em;
  color: var(--tk88-text-main);
  list-style: none; /* Hide default marker */
}

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

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

.page-register__faq-toggle {
  font-size: 1.5em;
  line-height: 1;
  color: var(--tk88-secondary);
  margin-left: 15px;
  transition: transform 0.3s ease;
}

.page-register__faq-item[open] .page-register__faq-toggle {
  transform: rotate(45deg);
}

.page-register__faq-answer {
  padding: 0 25px 20px 25px;
  font-size: 0.95em;
  color: var(--tk88-text-secondary);
  border-top: 1px solid var(--tk88-divider);
  margin-top: -1px; /* Overlap border for cleaner look */
}

/* Responsive Styles */
@media (max-width: 1024px) {
  .page-register__hero-content {
    margin-top: 60px;
  }
}

@media (max-width: 768px) {
  .page-register__container {
    padding-left: 15px !important;
    padding-right: 15px !important;
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
  }

  .page-register__hero-section {
    padding: 10px 0 40px 0;
  }

  .page-register__hero-content {
    padding: 30px 15px;
    margin-top: 80px;
  }

  .page-register__main-title {
    font-size: 2em;
  }

  .page-register__description {
    font-size: 1em;
  }

  .page-register__section-title {
    font-size: 1.8em;
  }

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

  .page-register__sub-title {
    font-size: 1.3em;
  }

  .page-register__registration-form {
    padding: 30px 20px;
  }

  .page-register__benefits-grid {
    grid-template-columns: 1fr;
  }

  .page-register__why-register-content {
    flex-direction: column;
  }

  .page-register__text-block {
    order: 2;
  }

  .page-register__why-register-image {
    order: 1;
    margin-bottom: 30px;
  }

  .page-register__btn-primary,
  .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;
  }
  
  /* Image and Video responsiveness */
  .page-register img,
  .page-register video,
  .page-register__video {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    display: block !important;
  }

  .page-register__section,
  .page-register__card,
  .page-register__container,
  .page-register__video-section,
  .page-register__video-container,
  .page-register__video-wrapper,
  .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;
    overflow: hidden !important;
  }

  .page-register__video-section {
    padding-top: 10px !important; /* body đã xử lý --header-offset */
  }

  .page-register__cta-buttons {
    display: flex;
    flex-direction: column; 
    gap: 10px;
  }

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

  .page-register__faq-answer {
    padding: 0 20px 15px 20px;
  }
}

@media (max-width: 480px) {
  .page-register__main-title {
    font-size: 1.8em;
  }

  .page-register__section-title {
    font-size: 1.6em;
  }
}