/* ==================================
   lesson.css
   ใช้กับทุกหน้าเนื้อหา
   เช่น astronaut / space / star / planet
================================== */

.wrap {
  min-height: 100vh;

  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;

  padding: 24px;
  position: relative;
  z-index: 1;
}

.progress {
  position: absolute;
  top: 22px;
  left: 24px;

  opacity: 0.75;
  font-size: 15px;
  z-index: 10;
}

.lesson-card {
  width: 100%;
  max-width: 860px;
  text-align: center;
}

.image-box {
  height: 280px;

  display: flex;
  justify-content: center;
  align-items: center;

  margin-bottom: 18px;
}

.image-box img {
  max-width: 100%;
  max-height: 100%;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-10px);
  }

  100% {
    transform: translateY(0);
  }
}

.lesson-card h1 {
  font-size: 32px;
  margin: 0 0 12px;
  text-align: left;
}

.lesson-card p {
  font-size: 16px;
  line-height: 1.7;
  opacity: 0.95;
  text-align: left;
  max-width: 100%;
  margin: 0;
}

.nav {
  margin-top: 20px;

  display: flex;
  gap: 12px;
}

.nav button {
  padding: 12px 18px;
  border: none;
  border-radius: 14px;
  cursor: pointer;

  background: #5e72eb;
  color: #fff;
  font-size: 16px;

  transition: 0.2s;
}

.nav button:hover {
  transform: translateY(-2px);
}

/* =========================
   MOBILE
========================= */

@media (max-width: 768px) {
  .wrap {
    justify-content: flex-start;
    padding: 16px;
    padding-top: 90px;
  }

  .progress {
    top: 18px;
    left: 14px;
    font-size: 14px;
  }

  .lesson-card h1 {
    font-size: 24px;
  }

  .lesson-card p {
    font-size: 15px;
    line-height: 1.6;
  }

  .image-box {
    height: 180px;
  }

  .nav {
    width: 100%;
    flex-direction: column;
  }

  .nav button {
    width: 100%;
  }
}