:root {
  --primary-color: #FFD700; /* Gold */
  --secondary-color: #000080; /* Dark Blue */
  --text-light: #ffffff;
  --text-dark: #333333;
  --bg-dark: #0a0a0a;
  --bg-light: #f8f9fa;
  --border-color: rgba(255, 255, 255, 0.1);
  --card-bg-dark: rgba(255, 255, 255, 0.08); /* Slightly lighter for cards on dark bg */
  --input-bg-dark: rgba(255, 255, 255, 0.15);
}

.page-register {
  font-family: 'Arial', sans-serif;
  line-height: 1.6;
  color: var(--text-light); /* Main text color for dark body background */
  background-color: var(--bg-dark); /* Should be consistent with shared.css body background */
  padding-top: 120px; /* Desktop: Adjust for fixed header */
}

/* General Container for content sections */
.page-register__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 20px;
  box-sizing: border-box;
}

/* Section Titles and Descriptions */
.page-register__section-title {
  font-size: 36px;
  color: var(--primary-color);
  text-align: center;
  margin-bottom: 20px;
  font-weight: bold;
  line-height: 1.3;
}

.page-register__section-description {
  font-size: 18px;
  color: var(--text-light);
  text-align: center;
  margin-bottom: 40px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

/* Hero Section (Registration Form) */
.page-register__hero-section {
  background: linear-gradient(135deg, var(--secondary-color), #001f3f);
  padding: 80px 0;
  text-align: center;
  border-bottom: 5px solid var(--primary-color);
}

.page-register__main-title {
  font-size: 48px;
  color: var(--primary-color);
  margin-bottom: 20px;
  font-weight: 900;
  text-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.page-register__hero-description {
  font-size: 20px;
  color: var(--text-light);
  max-width: 900px;
  margin: 0 auto 40px auto;
  line-height: 1.7;
}

.page-register__form-wrapper {
  background: var(--card-bg-dark);
  border-radius: 12px;
  padding: 40px;
  max-width: 600px;
  margin: 0 auto;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-color);
}

.page-register__registration-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-register__form-group {
  text-align: left;
}

.page-register__form-label {
  display: block;
  margin-bottom: 8px;
  font-size: 16px;
  color: var(--primary-color);
  font-weight: bold;
}

.page-register__form-input {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background-color: var(--input-bg-dark);
  color: var(--text-light);
  font-size: 16px;
  box-sizing: border-box;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.page-register__form-input::placeholder {
  color: rgba(255, 255, 255, 0.6);
}

.page-register__form-input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.3);
  outline: none;
}

.page-register__form-hint {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 5px;
  display: block;
}

.page-register__checkbox-group {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}

.page-register__form-checkbox {
  width: 18px;
  height: 18px;
  accent-color: var(--primary-color);
}

.page-register__form-checkbox-label {
  font-size: 15px;
  color: var(--text-light);
}

.page-register__terms-link {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: bold;
  transition: color 0.3s ease;
}

.page-register__terms-link:hover {
  color: #fff;
  text-decoration: underline;
}

/* Buttons */
.page-register__btn-primary {
  display: inline-block;
  padding: 15px 30px;
  background: var(--primary-color);
  color: var(--text-dark); /* Dark text on gold button for contrast */
  text-decoration: none;
  border-radius: 8px;
  font-size: 18px;
  font-weight: bold;
  text-align: center;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(255, 215, 0, 0.4);
  border: none;
  cursor: pointer;
  max-width: 100%; /* Ensure responsiveness */
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-register__btn-primary:hover {
  background: #e6c200;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 215, 0, 0.6);
}

.page-register__btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(255, 215, 0, 0.2);
}

.page-register__btn-secondary {
  display: inline-block;
  padding: 12px 25px;
  background: var(--secondary-color);
  color: var(--text-light);
  text-decoration: none;
  border-radius: 6px;
  font-size: 16px;
  font-weight: bold;
  text-align: center;
  transition: all 0.3s ease;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
  border: 1px solid var(--primary-color);
  cursor: pointer;
  max-width: 100%; /* Ensure responsiveness */
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-register__btn-secondary:hover {
  background: #001a33;
  border-color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.page-register__btn-secondary:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.page-register__submit-button {
  margin-top: 20px;
}

/* Dark Background Section */
.page-register__dark-section {
  background-color: var(--secondary-color);
  color: var(--text-light);
  padding: 60px 0;
}

.page-register__dark-section .page-register__section-title {
  color: var(--primary-color);
}

.page-register__dark-section .page-register__section-description {
  color: var(--text-light);
}

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

.page-register__benefit-item {
  background: var(--card-bg-dark);
  padding: 30px;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-register__benefit-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.page-register__benefit-icon {
  width: 200px; /* Min allowed image size */
  height: 200px;
  margin-bottom: 20px;
  filter: drop-shadow(0 0 5px var(--primary-color));
}

.page-register__benefit-title {
  font-size: 22px;
  color: var(--primary-color);
  margin-bottom: 15px;
  font-weight: bold;
}

.page-register__benefit-text {
  font-size: 16px;
  color: var(--text-light);
  line-height: 1.7;
}

/* Steps Section */
.page-register__steps-section {
  padding: 60px 0;
  background-color: var(--bg-dark);
}

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

.page-register__step-item {
  background: var(--card-bg-dark);
  padding: 30px;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-register__step-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.page-register__step-image {
  width: 100%;
  max-width: 300px;
  height: auto;
  border-radius: 8px;
  margin-bottom: 20px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.page-register__step-title {
  font-size: 22px;
  color: var(--primary-color);
  margin-bottom: 15px;
  font-weight: bold;
}

.page-register__step-text {
  font-size: 16px;
  color: var(--text-light);
  line-height: 1.7;
}

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

.page-register__cta-button {
  padding: 18px 45px;
  font-size: 20px;
}

/* Promotion Section */
.page-register__promo-section {
  padding: 60px 0;
}

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

.page-register__promo-card {
  background: var(--card-bg-dark);
  padding: 30px;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-register__promo-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.page-register__promo-image {
  width: 100%;
  max-width: 250px; /* Adjust image size in card */
  height: auto;
  border-radius: 8px;
  margin-bottom: 20px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.page-register__promo-title {
  font-size: 24px;
  color: var(--primary-color);
  margin-bottom: 15px;
  font-weight: bold;
}

.page-register__promo-text {
  font-size: 16px;
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 25px;
}

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

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

.page-register__faq-list {
  max-width: 800px;
  margin: 40px auto 0 auto;
}

/* FAQ容器样式 */
.page-register__faq-item {
  margin-bottom: 15px;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
  border: 1px solid var(--border-color);
}

/* FAQ默认状态 - 答案隐藏 */
.page-register__faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
  padding: 0 20px;
  opacity: 0;
  background: var(--card-bg-dark);
  color: var(--text-light);
}

/* FAQ展开状态 - 🚨 使用!important và đủ lớn max-height để đảm bảo có thể mở rộng */
.page-register__faq-item.active .page-register__faq-answer {
  max-height: 2000px !important; /* 🚨 Sử dụng !important để đảm bảo ưu tiên, giá trị đủ lớn để chứa mọi nội dung */
  padding: 20px !important;
  opacity: 1;
  border-top: 1px solid var(--border-color);
}

/* Vấn đề kiểu dáng */
.page-register__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 20px;
  background: var(--card-bg-dark);
  border-radius: 8px; /* For top corners */
  cursor: pointer;
  user-select: none;
  transition: background-color 0.3s ease, border-color 0.3s ease;
  position: relative;
  border: 1px solid transparent; /* Placeholder for consistent border behavior */
}

.page-register__faq-item.active .page-register__faq-question {
  border-radius: 8px 8px 0 0; /* Rounded top, sharp bottom when active */
  background-color: rgba(255, 255, 255, 0.15);
}

.page-register__faq-question:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: var(--primary-color);
}

.page-register__faq-question:active {
  background: rgba(255, 255, 255, 0.2);
}