:root {
  --primary-color: #C91F17;
  --secondary-color: #E53935;
  --button-gradient: linear-gradient(180deg, #FFD86A 0%, #E6B800 100%);
  --card-bg-color: #D32F2F;
  --main-bg-color: #B71C1C;
  --text-main-color: #FFF5E1;
  --border-color: #F2B544;
  --glow-color: #FFCC66;
  --gold-color: #F4D34D;
  --deep-red-color: #7A0E0E;

  /* Assuming body background from shared.css is dark for text-main-color to be FFF5E1 */
  --body-text-color: var(--text-main-color);
  --section-bg-color: rgba(255, 255, 255, 0.05); /* Slightly transparent white on dark main-bg-color */
  --card-text-color: var(--text-main-color);
  --heading-color: var(--gold-color); /* Headings can use gold for contrast on dark background */
}

/* Base styles for the page content */
.page-huong-dan-choi {
  font-family: Arial, sans-serif;
  color: var(--body-text-color); /* Default text color for the page */
  background-color: var(--main-bg-color); /* Use main-bg-color for page background if not handled by body */
  line-height: 1.6;
  padding-bottom: 40px; /* Ensure space above footer */
}

/* Fixed Header & Main Content Spacing: Assuming shared.css handles body padding-top */
/* So, top section padding will be small (10px) */
.page-huong-dan-choi__hero-section {
  padding-top: 10px; /* Small top padding as per instruction */
  padding-bottom: 40px;
  text-align: center;
  background-color: var(--deep-red-color); /* A darker red for hero section */
}

.page-huong-dan-choi__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.page-huong-dan-choi__main-title {
  font-size: clamp(2em, 4vw, 3em); /* H1 font size with clamp */
  font-weight: 700;
  color: var(--gold-color); /* Gold for main title */
  margin-bottom: 15px;
  line-height: 1.2;
}

.page-huong-dan-choi__description {
  font-size: 1.1em;
  color: var(--text-main-color);
  max-width: 800px;
  margin: 0 auto 30px auto;
}

.page-huong-dan-choi__cta-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 30px;
}

.page-huong-dan-choi__cta-buttons--center {
    justify-content: center;
}

.page-huong-dan-choi__cta-buttons--inline {
    display: inline-flex; /* For buttons within text/FAQ answers */
    gap: 10px;
    margin-top: 10px;
}

.page-huong-dan-choi__btn {
  display: inline-block;
  padding: 12px 25px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1em;
  transition: all 0.3s ease;
  cursor: pointer;
  max-width: 100%; /* Base responsive for buttons */
  box-sizing: border-box;
  white-space: normal; /* Allow text wrap */
  word-wrap: break-word; /* Allow text wrap */
}

.page-huong-dan-choi__btn-primary {
  background: var(--button-gradient);
  color: #333333; /* Dark text on gold gradient for contrast */
  border: 2px solid var(--border-color);
  box-shadow: 0 4px 15px rgba(0,0,0,0.2), 0 0 10px var(--glow-color);
}

.page-huong-dan-choi__btn-primary:hover {
  background: linear-gradient(180deg, #F4D34D 0%, #E6B800 100%); /* Slightly different gradient on hover */
  box-shadow: 0 6px 20px rgba(0,0,0,0.3), 0 0 15px var(--glow-color);
  transform: translateY(-2px);
}

.page-huong-dan-choi__btn-secondary {
  background: var(--deep-red-color);
  color: var(--text-main-color); /* White text on deep red */
  border: 2px solid var(--border-color);
  box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.page-huong-dan-choi__btn-secondary:hover {
  background: var(--primary-color);
  box-shadow: 0 6px 20px rgba(0,0,0,0.3);
  transform: translateY(-2px);
}

.page-huong-dan-choi__content-wrapper {
  padding: 40px 0;
}

.page-huong-dan-choi__article-wrap {
  max-width: 900px; /* Max width for long-form content */
  margin: 0 auto;
  padding: 0 20px;
}

.page-huong-dan-choi__section {
  margin-bottom: 40px;
  background-color: var(--section-bg-color); /* Slightly transparent background for sections */
  padding: 30px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.1); /* Subtle border */
}

.page-huong-dan-choi__section-title {
  font-size: 2.2em;
  font-weight: 700;
  color: var(--gold-color); /* Gold for section titles */
  margin-bottom: 20px;
  text-align: center;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--primary-color);
}

.page-huong-dan-choi__game-subtitle,
.page-huong-dan-choi__step-title {
  font-size: 1.6em;
  font-weight: 600;
  color: var(--secondary-color); /* Auxiliary red for subtitles */
  margin-top: 25px;
  margin-bottom: 15px;
}

.page-huong-dan-choi p {
  margin-bottom: 15px;
  color: var(--body-text-color); /* Ensure text color is consistent */
}

.page-huong-dan-choi__step-list,
.page-huong-dan-choi__sub-list,
.page-huong-dan-choi__tip-list,
.page-huong-dan-choi__support-list {
  list-style: none;
  padding-left: 0;
  margin-bottom: 20px;
}

.page-huong-dan-choi__step-list li {
  counter-increment: step-counter;
  margin-bottom: 25px;
  position: relative;
  padding-left: 40px;
}

.page-huong-dan-choi__step-list li::before {
  content: counter(step-counter);
  position: absolute;
  left: 0;
  top: 0;
  background-color: var(--primary-color);
  color: var(--text-main-color);
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1em;
  border: 2px solid var(--border-color);
}

.page-huong-dan-choi__sub-list li,
.page-huong-dan-choi__tip-list li,
.page-huong-dan-choi__support-list li {
  margin-bottom: 10px;
  padding-left: 25px;
  position: relative;
}

.page-huong-dan-choi__sub-list li::before,
.page-huong-dan-choi__tip-list li::before,
.page-huong-dan-choi__support-list li::before {
  content: '•'; /* Bullet point */
  position: absolute;
  left: 0;
  color: var(--gold-color); /* Gold bullet */
  font-size: 1.2em;
  line-height: 1;
}

.page-huong-dan-choi__info-card,
.page-huong-dan-choi__warning-card {
  background-color: var(--card-bg-color); /* Card BG color */
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 20px;
  margin-top: 20px;
  color: var(--card-text-color);
}

.page-huong-dan-choi__card-title {
  font-size: 1.4em;
  font-weight: 600;
  color: var(--gold-color);
  margin-bottom: 10px;
}

.page-huong-dan-choi__card-list {
  list-style: none;
  padding-left: 0;
}

.page-huong-dan-choi__card-list li {
  margin-bottom: 5px;
  padding-left: 20px;
  position: relative;
}

.page-huong-dan-choi__card-list li::before {
  content: '✓'; /* Checkmark */
  position: absolute;
  left: 0;
  color: var(--gold-color);
  font-weight: 700;
}

.page-huong-dan-choi__warning-card {
  background-color: var(--deep-red-color); /* A deeper red for warning */
  border-color: var(--gold-color);
}

.page-huong-dan-choi__figure {
  margin: 25px 0;
  text-align: center;
  background-color: rgba(0,0,0,0.3); /* Dark background for image frame */
  padding: 10px;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.1);
}

.page-huong-dan-choi__figure img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 5px;
  margin: 0 auto;
  min-width: 200px; /* Minimum size requirement */
  min-height: 200px; /* Minimum size requirement */
}

.page-huong-dan-choi__figcaption {
  font-size: 0.9em;
  color: rgba(255,255,255,0.7);
  margin-top: 10px;
}

.page-huong-dan-choi__faq-list {
  margin-top: 30px;
}

.page-huong-dan-choi__faq-item {
  background-color: var(--section-bg-color);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 8px;
  margin-bottom: 15px;
  overflow: hidden;
}

.page-huong-dan-choi__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 20px;
  font-size: 1.2em;
  font-weight: 600;
  color: var(--gold-color);
  cursor: pointer;
  background-color: var(--primary-color);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.page-huong-dan-choi__faq-question:hover {
  background-color: var(--secondary-color);
}

.page-huong-dan-choi__faq-answer {
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s ease-out;
  color: var(--body-text-color);
}

.page-huong-dan-choi__faq-item.active .page-huong-dan-choi__faq-answer {
  max-height: 500px; /* Arbitrary large value for smooth transition */
  padding-top: 15px;
  padding-bottom: 15px;
}

/* --- Responsive Styles --- */

/* Tablet and smaller screens */
@media (max-width: 1024px) {
  .page-huong-dan-choi__main-title {
    font-size: clamp(1.8em, 5vw, 2.8em);
  }

  .page-huong-dan-choi__section-title {
    font-size: 2em;
  }
}

/* Mobile specific styles */
@media (max-width: 768px) {
  /* 1. Top section title + Dual CTA */
  .page-huong-dan-choi__hero-section {
    padding-top: 10px !important; /* Enforce small top padding */
    padding-bottom: 30px;
  }

  .page-huong-dan-choi__main-title {
    font-size: clamp(1.5em, 7vw, 2.5em) !important; /* Ensure H1 is not too large */
    padding: 0 15px;
  }

  .page-huong-dan-choi__description {
    font-size: 1em;
    padding: 0 15px;
  }

  .page-huong-dan-choi__cta-buttons {
    flex-direction: column; /* Stack buttons vertically */
    gap: 15px;
    padding: 0 15px;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }
  
  /* 4. Buttons and button containers */
  .page-huong-dan-choi__btn,
  .page-huong-dan-choi__btn-primary,
  .page-huong-dan-choi__btn-secondary,
  .page-huong-dan-choi a[class*="button"],
  .page-huong-dan-choi 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;
    font-size: 0.95em;
  }

  .page-huong-dan-choi__cta-buttons--inline {
      flex-direction: column;
      gap: 10px;
      padding: 0;
      max-width: 100% !important;
      width: 100% !important;
      box-sizing: border-box !important;
  }
  
  /* 2. Single-column long-form container */
  .page-huong-dan-choi__content-wrapper {
    padding: 20px 0;
  }

  .page-huong-dan-choi__article-wrap {
    padding: 0 15px;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .page-huong-dan-choi__section {
    padding: 20px;
    margin-bottom: 30px;
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .page-huong-dan-choi__section-title {
    font-size: 1.8em;
  }

  .page-huong-dan-choi__game-subtitle,
  .page-huong-dan-choi__step-title {
    font-size: 1.4em;
  }

  .page-huong-dan-choi p,
  .page-huong-dan-choi li {
    font-size: 15px;
  }

  /* 3. General images and figure */
  .page-huong-dan-choi img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    min-width: unset !important; /* Reset min-width for mobile */
    min-height: unset !important; /* Reset min-height for mobile */
  }
  
  .page-huong-dan-choi__figure {
    padding: 5px; /* Smaller padding for image frame */
  }

  .page-huong-dan-choi__figcaption {
    font-size: 0.85em;
  }

  /* 5. Registration tutorial and FAQ blocks */
  .page-huong-dan-choi__step-list li {
    padding-left: 35px;
  }

  .page-huong-dan-choi__step-list li::before {
    width: 28px;
    height: 28px;
    font-size: 1em;
  }

  .page-huong-dan-choi__info-card,
  .page-huong-dan-choi__warning-card {
    padding: 15px;
  }

  .page-huong-dan-choi__card-title {
    font-size: 1.2em;
  }

  .page-huong-dan-choi__faq-question {
    font-size: 1.1em;
    padding: 12px 15px;
  }

  .page-huong-dan-choi__faq-answer {
    padding: 0 15px;
  }
}