* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Georgia', serif;
  background: linear-gradient(
    to bottom,
    #4a5568 0%,
    #2d3748 50%,
    #1a202c 100%
  );
  background-attachment: fixed;
  min-height: 100vh;
  color: #e2e8f0;
  position: relative;
  overflow-x: hidden;
  padding: 80px 20px 120px;
}

/* Rain effect container */
.rain-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
  opacity: 0.3;
}

/* Content */
.content {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  z-index: 10;
  background: rgba(255, 255, 255, 0.95);
  padding: 60px 70px;
  border-radius: 5px;
  box-shadow: 0 10px 50px rgba(0, 0, 0, 0.4);
  border-left: 5px solid #718096;
}

.content h1 {
  font-size: 2.8em;
  margin-bottom: 50px;
  color: #2d3748;
  text-align: center;
  font-weight: 400;
  letter-spacing: 1px;
  position: relative;
  padding-bottom: 20px;
}

.content h1::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 2px;
  background: #718096;
}

.text-block {
  line-height: 2;
}

.text-block p {
  font-size: 1.15em;
  line-height: 1.9;
  margin-bottom: 30px;
  color: #2d3748;
  text-align: justify;
  text-indent: 40px;
  hyphens: auto;
}

.text-block p:first-child {
  font-weight: 500;
}

.text-block p:last-child {
  margin-bottom: 0;
}

/* Back link */
.back-link {
  position: fixed;
  top: 30px;
  left: 30px;
  color: #e2e8f0;
  text-decoration: none;
  font-size: 1em;
  padding: 12px 25px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-radius: 5px;
  transition: all 0.3s ease;
  z-index: 100;
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(5px);
}

.back-link:hover {
  background: rgba(0, 0, 0, 0.6);
  border-color: rgba(255, 255, 255, 0.7);
  transform: translateX(-3px);
}

/* Rain droplets */
.rain-drop {
  position: absolute;
  width: 2px;
  height: 40px;
  background: linear-gradient(to bottom, transparent, rgba(255, 255, 255, 0.6));
  animation: fall linear infinite;
  pointer-events: none;
}

@keyframes fall {
  0% {
    transform: translateY(-100px);
    opacity: 1;
  }
  100% {
    transform: translateY(100vh);
    opacity: 0.3;
  }
}

/* Paint brush strokes decoration */
.content::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 5px;
  background: linear-gradient(
    90deg,
    #718096 0%,
    #4a5568 25%,
    #2d3748 50%,
    #4a5568 75%,
    #718096 100%
  );
  border-radius: 5px 5px 0 0;
}

/* Responsive */
@media (max-width: 768px) {
  .content {
    padding: 40px 30px;
  }
  
  .content h1 {
    font-size: 2.2em;
  }
  
  .text-block p {
    font-size: 1.05em;
    line-height: 1.8;
    text-indent: 20px;
  }
  
  .back-link {
    top: 15px;
    left: 15px;
    font-size: 0.9em;
    padding: 10px 20px;
  }
}

/* Fade in animation */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.content {
  animation: fadeIn 1s ease-out;
}