/* ปุ่ม */
.btn {
  display: inline-block;
  padding: 0.8rem 2rem;
  border-radius: 50px;
  font-weight: 500;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  font-size: 1rem;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background-color: var(--secondary-color);
  color: var(--white);
  z-index: 1;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(45deg, var(--secondary-light), var(--secondary-color));
  z-index: -1;
  transition: var(--transition);
  opacity: 1;
}

.btn-primary:hover::before {
  opacity: 0;
}

.btn-primary:hover {
  background-color: var(--secondary-light);
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(227, 25, 55, 0.3);
}

.btn-outline {
  background-color: transparent;
  color: var(--white);
  border: 2px solid var(--white);
  position: relative;
  overflow: hidden;
}

.btn-outline::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--white);
  transition: var(--transition);
  z-index: -1;
}

.btn-outline:hover {
  color: var(--secondary-color);
}

.btn-outline:hover::before {
  left: 0;
}

/* การ์ด */
.link-card {
  background-color: var(--white);
  border-radius: 15px;
  overflow: hidden;
  box-shadow: var(--box-shadow);
  transition: var(--transition);
  transform-style: preserve-3d;
  perspective: 1000px;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.6s ease-out forwards;
  position: relative;
  z-index: 1;
}

.link-card:hover {
  transform: translateY(-10px) rotateY(5deg);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.link-icon {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  color: var(--white);
  font-size: 2rem;
  padding: 2rem;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.link-content {
  padding: 2rem;
  position: relative;
}

.link-content h3 {
  color: var(--primary-color);
  margin-bottom: 1rem;
  font-size: 1.3rem;
  transition: var(--transition);
}

.link-card:hover .link-content h3 {
  color: var(--secondary-color);
}

/* Social icons */
.social-links {
  display: flex;
  gap: 1.2rem;
  margin-top: 1.5rem;
}

.social-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  color: white;
  font-size: 1.1rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.social-icon .tooltip {
  position: absolute;
  top: -35px;
  background: rgba(0, 0, 0, 0.8);
  color: white;
  padding: 5px 10px;
  border-radius: 5px;
  font-size: 0.8rem;
  opacity: 0;
  transition: all 0.3s ease;
  pointer-events: none;
  white-space: nowrap;
}

.social-icon:hover .tooltip {
  opacity: 1;
  transform: translateY(-5px);
}

.facebook {
  background-color: #1877F2;
}

.facebook:hover {
  background-color: #166FE5;
  transform: translateY(-3px) scale(1.1);
}

.youtube {
  background-color: #FF0000;
}

.youtube:hover {
  background-color: #E50000;
  transform: translateY(-3px) scale(1.1);
}

/* Scroll indicator */
.scroll-indicator {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 50px;
  height: 50px;
  background-color: var(--secondary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
  box-shadow: 0 5px 15px rgba(227, 25, 55, 0.3);
}

.scroll-indicator.active {
  opacity: 1;
  visibility: visible;
}

.scroll-indicator:hover {
  transform: translateY(-5px);
  background-color: var(--secondary-light);
}