@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@500;700&display=swap');

body {
  margin: 0;
  font-family: 'Poppins', sans-serif;
  background: linear-gradient(rgba(50, 20, 0, 0.75), rgba(20, 5, 0, 0.85)),
    url('https://images.pexels.com/photos/276452/pexels-photo-276452.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=750&w=1260') no-repeat center center fixed;
  background-size: cover;
  color: #fff6e6;
  display: flex;
  justify-content: center;
  padding: 60px 20px;
  min-height: 100vh;
}

.thermo-container {
  background-color: rgba(40, 20, 5, 0.85);
  padding: 50px 60px;
  border-radius: 20px;
  max-width: 900px;
  box-shadow: 0 0 60px #f7a540cc;
  animation: glowFadeIn 1.6s ease forwards;
}

header {
  text-align: center;
  margin-bottom: 40px;
}

h1 {
  font-size: 3rem;
  font-weight: 700;
  color: #ffb347;
  text-shadow: 0 0 18px #f7941e;
}

.back-link {
  color: #ffb347;
  font-weight: 600;
  font-size: 1.1rem;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color 0.3s ease;
  margin-top: 15px;
  display: inline-block;
}
.back-link:hover {
  border-bottom: 2px solid #ffb347;
}

h2 {
  color: #ffcc80;
  border-bottom: 3px solid #f7a540;
  padding-bottom: 6px;
  margin-top: 30px;
  margin-bottom: 24px;
}

.intro p {
  font-size: 1.2rem;
  line-height: 1.7;
  color: #ffe9c4;
}

.video-section iframe {
  display: block;
  margin: 0 auto 40px;
  border-radius: 16px;
  width: 100%;
  max-width: 560px;
  height: 315px;
  box-shadow: 0 0 40px #f7a540cc;
}

.key-points ul {
  font-size: 1.15rem;
  padding-left: 28px;
  color: #ffdf9a;
}

.key-points li {
  margin-bottom: 14px;
}

/* Animations */
@keyframes glowFadeIn {
  0% {
    opacity: 0;
    transform: scale(0.96);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}