/* style/bn-c.css */

/* Biến CSS */
:root {
  --page-bn-c-primary-color: #0A192F;
  --page-bn-c-accent-color: #FFD700;
  --page-bn-c-text-light: #FFFFFF;
  --page-bn-c-text-dark: #0A192F;
  --page-bn-c-bg-dark: #0A192F;
  --page-bn-c-bg-light: #F0F2F5;
  --page-bn-c-card-bg: #1A2E47;
  --page-bn-c-border-color: rgba(255, 215, 0, 0.3);
}

.page-bn-c {
  font-family: 'Arial', sans-serif;
  line-height: 1.6;
  color: var(--page-bn-c-text-light);
  background-color: var(--page-bn-c-bg-dark);
}

.page-bn-c__section {
  padding: 60px 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.page-bn-c__section h2 {
  font-size: 2.5em;
  color: var(--page-bn-c-accent-color);
  text-align: center;
  margin-bottom: 40px;
  position: relative;
}

.page-bn-c__section h2::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: -10px;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background-color: var(--page-bn-c-accent-color);
  border-radius: 2px;
}

.page-bn-c__hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 20px;
  background: linear-gradient(135deg, var(--page-bn-c-primary-color) 0%, #000000 100%);
  color: var(--page-bn-c-text-light);
  position: relative;
  overflow: hidden;
}

.page-bn-c__hero-content {
  max-width: 900px;
  z-index: 1;
}

.page-bn-c__hero h1 {
  font-size: 3.5em;
  margin-bottom: 20px;
  color: var(--page-bn-c-accent-color);
  line-height: 1.2;
}

.page-bn-c__hero p {
  font-size: 1.2em;
  margin-bottom: 30px;
  line-height: 1.8;
}

.page-bn-c__hero-actions {
  display: flex;
  gap: 20px;
  justify-content: center;
}

.page-bn-c__btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  transition: all 0.3s ease;
  font-size: 1.1em;
  cursor: pointer;
  text-align: center;
}

.page-bn-c__btn--primary {
  background-color: var(--page-bn-c-accent-color);
  color: var(--page-bn-c-primary-color);
  border: 2px solid var(--page-bn-c-accent-color);
}

.page-bn-c__btn--primary:hover {
  background-color: #FFC107; /* Slightly darker gold */
  border-color: #FFC107;
}

.page-bn-c__btn--secondary {
  background-color: transparent;
  color: var(--page-bn-c-accent-color);
  border: 2px solid var(--page-bn-c-accent-color);
}

.page-bn-c__btn--secondary:hover {
  background-color: var(--page-bn-c-accent-color);
  color: var(--page-bn-c-primary-color);
}

.page-bn-c__btn--small {
  padding: 8px 18px;
  font-size: 0.95em;
  border-radius: 6px;
}

.page-bn-c__btn--large {
  padding: 16px 35px;
  font-size: 1.3em;
  border-radius: 10px;
}

.page-bn-c__hero-image {
  margin-top: 40px;
  max-width: 100%;
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}

.page-bn-c__hero-image img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

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

.page-bn-c__card {
  background-color: var(--page-bn-c-card-bg);
  border-radius: 15px;
  padding: 30px;
  text-align: center;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid var(--page-bn-c-border-color);
}

.page-bn-c__card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.5);
}

.page-bn-c__card img {
  width: 100%;
  max-width: 300px;
  height: auto;
  object-fit: cover;
  border-radius: 10px;
  margin-bottom: 20px;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.page-bn-c__card h3 {
  font-size: 1.5em;
  color: var(--page-bn-c-accent-color);
  margin-bottom: 15px;
}

.page-bn-c__card p {
  font-size: 1em;
  color: var(--page-bn-c-text-light);
}

.page-bn-c__how-to-play {
  background-color: var(--page-bn-c-primary-color);
}

.page-bn-c__steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.page-bn-c__step-card {
  background-color: var(--page-bn-c-card-bg);
  border-radius: 15px;
  padding: 30px;
  text-align: center;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
  border: 1px solid var(--page-bn-c-border-color);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.page-bn-c__step-number {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background-color: var(--page-bn-c-accent-color);
  color: var(--page-bn-c-primary-color);
  font-size: 2em;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  box-shadow: 0 0 15px rgba(255, 215, 0, 0.5);
}

.page-bn-c__step-card h3 {
  font-size: 1.4em;
  color: var(--page-bn-c-accent-color);
  margin-bottom: 15px;
}

.page-bn-c__step-card p {
  font-size: 0.95em;
  color: var(--page-bn-c-text-light);
  flex-grow: 1;
  margin-bottom: 20px;
}

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

.page-bn-c__promo-card {
  background-color: var(--page-bn-c-card-bg);
  border-radius: 15px;
  padding: 30px;
  text-align: center;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid var(--page-bn-c-border-color);
}

.page-bn-c__promo-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.5);
}

.page-bn-c__promo-card img {
  width: 100%;
  max-width: 350px;
  height: auto;
  object-fit: cover;
  border-radius: 10px;
  margin-bottom: 20px;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.page-bn-c__promo-card h3 {
  font-size: 1.5em;
  color: var(--page-bn-c-accent-color);
  margin-bottom: 15px;
}

.page-bn-c__promo-card p {
  font-size: 1em;
  color: var(--page-bn-c-text-light);
  margin-bottom: 20px;
}

.page-bn-c__tips-content {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.page-bn-c__tips-text ul {
  list-style: none;
  padding: 0;
  margin: 20px 0;
}

.page-bn-c__tips-text ul li {
  background-color: var(--page-bn-c-card-bg);
  margin-bottom: 15px;
  padding: 15px 25px;
  border-left: 5px solid var(--page-bn-c-accent-color);
  border-radius: 8px;
  font-size: 1.05em;
  line-height: 1.7;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
  color: var(--page-bn-c-text-light);
}

.page-bn-c__tips-text ul li strong {
  color: var(--page-bn-c-accent-color);
}

.page-bn-c__tips-text p {
  margin-bottom: 20px;
  font-size: 1.1em;
}

.page-bn-c__tips-image img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 15px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.4);
}

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

.page-bn-c__feature-item {
  background-color: var(--page-bn-c-card-bg);
  border-radius: 15px;
  padding: 30px;
  text-align: center;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
  border: 1px solid var(--page-bn-c-border-color);
}

.page-bn-c__feature-item img {
  width: 100%;
  max-width: 250px;
  height: auto;
  object-fit: contain;
  margin-bottom: 20px;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.page-bn-c__feature-item h3 {
  font-size: 1.4em;
  color: var(--page-bn-c-accent-color);
  margin-bottom: 15px;
}

.page-bn-c__feature-item p {
  font-size: 0.95em;
  color: var(--page-bn-c-text-light);
}

.page-bn-c__faq {
  background-color: var(--page-bn-c-primary-color);
}

.page-bn-c__accordion {
  max-width: 800px;
  margin: 0 auto;
}

.page-bn-c__accordion-item {
  background-color: var(--page-bn-c-card-bg);
  border: 1px solid var(--page-bn-c-border-color);
  border-radius: 10px;
  margin-bottom: 15px;
  overflow: hidden;
}

.page-bn-c__accordion-header {
  width: 100%;
  padding: 20px 25px;
  background-color: var(--page-bn-c-primary-color);
  color: var(--page-bn-c-text-light);
  font-size: 1.2em;
  font-weight: bold;
  text-align: left;
  border: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color 0.3s ease;
}

.page-bn-c__accordion-header:hover {
  background-color: #1a3a5e; /* Slightly lighter primary for hover */
}

.page-bn-c__accordion-header::after {
  content: '+';
  font-size: 1.5em;
  transition: transform 0.3s ease;
}

.page-bn-c__accordion-header.active::after {
  content: '-';
  transform: rotate(180deg);
}

.page-bn-c__accordion-content {
  padding: 0 25px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease-out, padding 0.4s ease-out;
}

.page-bn-c__accordion-content.active {
  max-height: 500px; /* Adjust based on expected content length */
  padding: 15px 25px 25px;
}

.page-bn-c__accordion-content p {
  color: var(--page-bn-c-text-light);
  margin-bottom: 15px;
}

.page-bn-c__accordion-content .page-bn-c__btn {
  margin-top: 10px;
}

.page-bn-c__cta {
  text-align: center;
  background: linear-gradient(45deg, var(--page-bn-c-primary-color), #000000);
  padding: 80px 20px;
}

.page-bn-c__cta h2 {
  color: var(--page-bn-c-accent-color);
  font-size: 2.8em;
}

.page-bn-c__cta p {
  font-size: 1.3em;
  margin-bottom: 40px;
  color: var(--page-bn-c-text-light);
}

/* Responsive Design */
@media (min-width: 768px) {
  .page-bn-c__hero {
    flex-direction: row;
    text-align: left;
    padding: 100px 40px;
    gap: 40px;
  }

  .page-bn-c__hero-content {
    flex: 1;
    text-align: left;
  }

  .page-bn-c__hero-actions {
    justify-content: flex-start;
  }

  .page-bn-c__hero-image {
    flex: 1;
    margin-top: 0;
  }

  .page-bn-c__hero h1 {
    font-size: 4em;
  }

  .page-bn-c__section h2 {
    font-size: 3em;
  }

  .page-bn-c__tips-content {
    flex-direction: row;
    align-items: center;
  }

  .page-bn-c__tips-text {
    flex: 2;
    padding-right: 40px;
  }

  .page-bn-c__tips-image {
    flex: 1;
  }
}

@media (min-width: 1024px) {
  .page-bn-c__hero h1 {
    font-size: 4.5em;
  }

  .page-bn-c__section h2 {
    font-size: 3.5em;
  }
}