body {
  font-family: 'Helvetica', Arial, sans-serif; 
  background-color: #15161b; 
  text-align: center;
  color: #ffffff;
  margin: 0;      
}

main {
  font-size: clamp(11px, 1.8vw, 18px);
  font-family: Helvetica, Arial, sans-serif;
  max-width: 1000px;
  width: 97%;
  margin: 10px auto;
  padding-top: 68px;
  box-sizing: border-box;
}


/*-----------------------------------------------------------------*/
/* Header --------------------------------------------------------*/
/*-----------------------------------------------------------------*/
.header {
  margin: 0;
  background: #15161bb9;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: fixed;
  top: 0;
  max-width: 1000px;
  width: 97%;
  z-index: 1000;
}

.header #name {
  margin: 20px 0;
  font-size: clamp(14px, 2.3vw, 20px);
}
#name a {
  color: inherit;
  text-decoration: none;
}
#name a:visited {
  color: inherit;
}
.subpage {
  background: transparent;
  font-size: clamp(9px, 1.8vw, 18px);
  text-align: left;
  border: none;
  color: #b2b2b2;
}
.nav {
  display: flex;
  gap: clamp(1px, 2vw, 20px);
  align-items: center;
}

.nav .subpage {
  cursor: pointer;
  transition: transform 0.2s;
}

.nav .subpage:hover {
  transform: translateY(3px);
}

.header.hidden {
  transform: translateY(-120%);
}

.header.animate,
.header.animate.hidden {
  transition: transform 1s ease-in-out;
}


/*-----------------------------------------------------------------*/
/* Content --------------------------------------------------------*/
/*-----------------------------------------------------------------*/
.main-image {
  aspect-ratio: 2 / 1;
  width: 100%;
  background: url('mergeprep.png') no-repeat center center;
  background-size: contain;
  background-position: center;
  margin-bottom: 20px;
}

.intro {
  margin: 30px 0;
  margin-bottom: 30px;
  font-size: clamp(11px, 2.0vw, 20px);
  line-height: 1.5;
  color: #adadad;
}
.title {
  height: clamp(50px, 10vw, 100px);
  background: url('title.png') no-repeat center center;
  background-size: contain;
  color:rgb(255, 255, 255);
  font-weight: bold;
  margin-bottom: 10px;
}
a {
  color: inherit;
}
#github {
  font-size: clamp(11px, 2.3vw, 20px);
  color: #ffffff;
  margin-bottom: 30px;
}
.description {
  font-size: clamp(11px, 2.0vw, 20px);
  text-align: justify;
  color: #adadad;
  margin-bottom: 10px;
  line-height: 1.5;
}
#diagram {
  height: clamp(200px, 40vw, 400px);
  background: url('diagram.png') no-repeat center center;
  background-size: contain;
  margin-bottom: clamp(20px, 4vw, 40px);
}
#research-question {
  width: clamp(200px, 60vw, 600px);
  margin: 100px auto 100px auto;
  font-size: clamp(11px, 2.3vw, 20px);
  color: #ffffff;
  margin-bottom: 10px;
}
#highlight {
  color: rgb(255, 77, 77);
}

.section-title {
  text-align: left;
  color:#e2e2e2;
  font-size: clamp(16px, 2.5vw, 25px);
  font-weight: bold;
  margin: 40px 0;
}
.flow-chart {  
  aspect-ratio: 16 / 10;
  width: 100%;
  background: url('flowchart.png') no-repeat center center;
  background-size: contain;
  background-position: center;
  margin-bottom: 20px;
}
.flow-chart2 {  
  aspect-ratio: 2 / 1;
  width: 100%;
  background: url('flowchart2.png') no-repeat center center;
  background-size: contain;
  background-position: center;
  margin-bottom: 20px;
}

.capture {  
  aspect-ratio: 2 / 1;
  width: 100%;
  margin-bottom: 20px;
}
#capture1 {  
  background: url('capture2.png') no-repeat center center;
  background-size: contain;
  background-position: center;
}
#capture2 {  
  background: url('capture3.png') no-repeat center center;
  background-size: contain;
  background-position: center;
}
#capture3 {  
  background: url('capture1.png') no-repeat center center;
  background-size: contain;
  background-position: center;
  margin-bottom: 200px;
}
#gif {  
  background: url('presentation.gif') no-repeat center center;
  background-size: contain;
  background-position: center;
  aspect-ratio: 16 / 10;
  width: 100%;
  margin-bottom: 20px;
}

.footer {
  font-size: clamp(10px, 1.5vw, 15px);
  line-height: 1.5;
  height: 200px;
  margin: 100px 0 0 0;
  text-align: left;
}