* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: #3F7D58;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 2rem;
}

header {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px 0;
}

.logo img {
  height: 200px;
  margin-bottom: -20px;
  transition: transform 0.5s ease;
  animation: tiltLogo 4s ease-in-out infinite;
}

.logo img:hover {
  transform: scale(1.05) rotate(-2deg);
}

@keyframes tiltLogo {
  0%   { transform: rotate(0deg); }
  25%  { transform: rotate(2deg); }
  50%  { transform: rotate(0deg); }
  75%  { transform: rotate(-2deg); }
  100% { transform: rotate(0deg); }
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 2rem;
}

.nav-links a {
  text-decoration: none;
  color: #3f7d58;
  font-weight: 500;
  padding: 0.4rem 1.5rem;
  font-size: 17px;
  border-radius: 25px;
  transition: all 0.3s ease;
}

.nav-links a:hover {
  font-weight: bold;
}

.nav-links a.active {
  border: 1px solid #3f7d58;
}

.intro {
  text-align: center;
  max-width: 700px;
  line-height: 1.6;
  margin: 0px auto;
  margin-bottom: 50px;
  font-size: 16px;
  color: #3f7d58;
  padding: 0 15px;
  animation: fadeUp 1s ease;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.instructor {
  display: flex;
  align-items: center;
  margin-bottom: 2rem;
  gap: 2rem;
  cursor: pointer;
  padding-inline: 5rem;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
  animation: slideUp 0.8s ease forwards;
  opacity: 0;
}
.instructor:nth-child(1) { animation-delay: 0.2s; }
.instructor:nth-child(2) { animation-delay: 0.4s; }
.instructor:nth-child(3) { animation-delay: 0.6s; }

@keyframes slideUp {
  from { opacity: 0; transform: translateY(40px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.instructor.reverse {
  flex-direction: row-reverse;
}

.info.reverse-text {
  text-align: right;
}

.info.reverse-text hr {
  margin-left: auto; 
}

.instructor:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0);
}

.instructor img {
  width: 250px;
  height: 250px;
  border-radius: 50%;
  object-fit: cover;
  transition: transform 0.5s ease, filter 0.4s ease;
}

.instructor:hover img {
  transform: scale(1.1) rotate(2deg);
  filter: brightness(1.1) saturate(1.2);
}

.info {
  flex: 1;
  animation: fadeInRight 1s ease forwards;
  opacity: 0;
}
@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(-30px); }
  to { opacity: 1; transform: translateX(0); }
}

.name {
  font-size: 2.6rem;
  font-weight: bold;
  font-family: 'Source Serif Pro', serif;
  color: #3f7d58;
}

.title {
  font-size: 1rem;
  font-style: italic;
  margin-top: -5px;
  color: #3f7d58;
  margin-bottom: 0.5rem;
}

.info hr {
  border: 0;
  border-top: 2px solid #3f7d58;
  margin: 0.5rem 0 1rem 0;
  width: 80%;
}

.schedule {
  font-size: 1rem;
  line-height: 1.5;
  color: #3f7d58;
}

.career-description {
  display: none;
  margin-top: 0.8rem;
  color: #fff;
  padding: 0.8rem 1rem;
  background: #3f7d58;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  border-radius: 6px;
  font-size: 1rem;
  line-height: 1.5;
  animation: expandFade 0.5s ease-in-out;
  transform-origin: top;
}

@keyframes expandFade {
  from { opacity: 0; transform: scaleY(0.8); }
  to { opacity: 1; transform: scaleY(1); }
}

/* Footer */
.footer {
  background-color: #3F7D58;
  color: #fff;
  text-align: center;
  padding: 5px 5px;
  margin-top: 50px;
}

.footer-logo {
  width: 150px;
  margin-top: -20px;
  margin-bottom: -50px;
}

.footer-text {
  margin: 1px 0;
  font-size: 1rem;
}

.footer-rights {
  margin-top: 2px;
  font-size: 0.9rem;
  margin-bottom: 10px;
  color: #ffffff;
}

@media (max-width: 480px) {
  .intro{
    font-size: 14px;
  }
  header {
    padding: 10px 0;
  }
  .logo img {
    height: 120px;
  }
  .nav-links {
    gap: 10px;
  }
  .nav-links a {
    padding: 5px 15px;
    font-size: 14px;
  }
  .footer-logo {
    width: 90px;
    margin-bottom: -15px;
    margin-top: 3px;
  }
  .footer-text {
    margin-top: -5px;
    margin-bottom: 5px;
    font-size: 14px;
  }
  .footer-rights {
    font-size: 12px;
    margin-top: 1px;
    margin-bottom: 10px;
  }
}

@media (max-width: 900px) {
  .instructor {
    flex-direction: column !important; 
    text-align: center;
    padding-inline: 2rem;
  }
  .instructor.reverse {
    flex-direction: column !important; 
  }
  .instructor img {
    width: 200px;
    height: 200px;
    margin-bottom: 0.3rem;
  }
  .info {
    text-align: center !important;
  }
  .info hr {
    margin: 0.5rem auto 1rem auto; 
    width: 60%;
  }
  .career-description {
    text-align: left; 
  }
}

@media (max-width: 500px) {
  .instructor img {
    width: 150px;
    height: 150px;
  }

  .name {
    font-size: 1.5rem;
  }

  .title {
    font-size: 0.9rem;
  }

  .schedule {
    font-size: 0.9rem;
  }
}