body {
  background: #f9f6ef url('https://www.transparenttextures.com/patterns/old-mathematics.png');
  color: #3e2c1c;
  font-family: 'EB Garamond', 'Crimson Pro', 'Noto Serif', serif;
  margin: 0;
  padding: 0;
  position: relative;
}

/* Faint Sanskrit watermark */
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: url('https://upload.wikimedia.org/wikipedia/commons/4/4c/Manuscript_Devanagari.png') center center no-repeat;
  background-size: 60vw auto;
  opacity: 0.04;
  pointer-events: none;
  z-index: 0;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(90deg, #e2c590 80%, #f7e7b3 100%);
  padding: 0.5em 2em 0.5em 2em;
  text-align: left;
  border-bottom: 3px double #bfa14a;
  box-shadow: 0 2px 8px #bfa14a22;
  position: relative;
  z-index: 1;
}
header h1 {
  font-size: 2em;
  color: #3e2c1c;
  border-bottom: none;
  display: block;
  padding-bottom: 0;
  margin: 0;
  letter-spacing: 0.04em;
  text-align: left;
}
nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 1.2em;
}
nav a {
  color: #3e2c1c;
  text-decoration: none;
  font-weight: bold;
  font-size: 1.1em;
  letter-spacing: 0.03em;
  padding: 0.2em 0.5em;
  border-radius: 6px;
  transition: background 0.2s, color 0.2s;
}
nav a:hover, nav a:focus {
  background: #bfa14a33;
  color: #7c5c2b;
}

h1, h2, h3 {
  font-family: 'EB Garamond', serif;
  color: #3e2c1c;
  text-shadow: 0 1px 0 #fffbe8, 0 2px 4px #bfa14a22;
  margin-top: 1.2em;
  margin-bottom: 0.5em;
}
h1 {
  font-size: 2.5em;
  color: #3e2c1c;
  border-bottom: 2px solid #bfa14a;
  display: inline-block;
  padding-bottom: 0.2em;
  margin-bottom: 0.5em;
  letter-spacing: 0.04em;
}
h2 {
  font-size: 1.7em;
  color: #2d3a5a;
  border-left: 6px solid #bfa14a;
  padding-left: 0.5em;
  background: linear-gradient(90deg, #f7e7b3 0%, #fffbe8 50%);
  border-radius: 0 12px 12px 0;
  margin-top: 1.5em;
}
h3 {
  font-size: 1.2em;
  color: #7c5c2b;
  margin-top: 1.2em;
}

main {
  max-width: 1100px;
  margin: 2em auto;
  background: rgba(255,255,255,0.0);
  padding: 0;
  border-radius: 18px;
  box-shadow: none;
  border: none;
  position: relative;
  z-index: 1;
}

hr {
  border: 0;
  border-top: 2px dashed #bfa14a;
  margin: 2em 0;
}

/* Drop cap for manuscript feel */
.dropcap {
  float: left;
  font-size: 3.2em;
  line-height: 1;
  margin-right: 0.18em;
  color: #bfa14a;
  font-family: 'EB Garamond', serif;
  font-weight: bold;
  text-shadow: 0 1px 0 #fffbe8;
}

/* Manuscript-style plot frames */
iframe,img , img.plot-frame {
  border: 3px double #bfa14a;
  border-radius: 12px;
  margin: 1.5em 0;
  background: #fffbe8;
  box-shadow: 0 2px 12px #bfa14a22;
}

/* Ornamental divider (use as <div class="ornament"></div>) */
.ornament {
  width: 100%;
  height: 32px;
  background: url('https://upload.wikimedia.org/wikipedia/commons/6/6b/Indian_motif_gold.png') center center no-repeat;
  background-size: 180px 32px;
  margin: 2em 0;
  opacity: 0.25;
}

/* Analysis page specific styles */
.analysis-main .tab-container {
  border-bottom: none;
  /* margin-top: 1.5em; */
  margin-bottom: -2.2em;
  margin-left: auto;
  margin-right: auto;
  display: flex;
  gap: 0.5em;
  background: none;
  border-radius: 0;
  box-shadow: none;
  position: relative;
  z-index: 2;
  justify-content: flex-start;
  width: 100%;
  max-width: 1100px;
}

.base-main {
  background: #fffbe8;
  border: 2px solid #bfa14a;
  border-radius: 14px ;
  box-shadow: 0 0 18px #bfa14a33, 0 0 0 8px #e2c59033;
  padding: 0 2em 2em 2em;
  margin-top: 27px;
  position: relative;
  z-index: 1;
}


.analysis-main .tab-link {
  background: #e2c590;
  border: 2px solid #bfa14a;
  /* border-top: none; */
  border-radius: 10px 10px 0 0;
  /* padding: 0.6em 1.4em 0.4em 1.4em; */
  cursor: pointer;
  font-family: 'EB Garamond', serif;
  font-size: 1.08em;
  color: #7c5c2b;
  outline: none;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
  position: relative;
  top: -6.5px;

  right: 0px;
  box-shadow: 0 2px 8px #bfa14a22;
  z-index: 3;
}
.analysis-main .tab-link.active, .analysis-main .tab-link:hover {
  background: #fffbe8;
  color: #3e2c1c;
  /* font-weight: bold; */
  z-index: 4;
  border-bottom: 2px solid #fffbe8;
  box-shadow: 0 -2px 12px #bfa14a44, 0 2px 6px #fffbe8;
}
.analysis-main .analysis-frame {
  background: #fffbe8;
  border: 2px solid #bfa14a;
  border-radius: 0 14px 0 0 ;
  box-shadow: 0 0 18px #bfa14a33, 0 0 0 8px #e2c59033;
  padding: 0 2em 2em 2em;
  margin-top: 27px;
  position: relative;
  z-index: 1;
}
.analysis-main {
  max-width: 1100px;
  margin: 2em auto;
  background: rgba(255,255,255,0.0);
  padding: 0;
  border-radius: 18px;
  box-shadow: none;
  border: none;
  position: relative;
  z-index: 1;
}

footer {
  border-top: 3px double #bfa14a;
  font-size: 0.95em;
  color: #7c5c2b;
  background: linear-gradient(90deg, #e2c590 80%, #f7e7b3 100%);
  margin-top: 2em;
  box-shadow: 0 -2px 8px #bfa14a22;
}

@media (max-width: 700px) {
  header {
    flex-direction: column;
    align-items: flex-start;
    padding: 0.7em 1em 0.7em 1em;
  }
  header h1 {
    font-size: 1.2em;
    margin-bottom: 0.5em;
    text-align: left;
  }
  nav {
    width: 100%;
    justify-content: flex-end;
    gap: 0.5em;
  }
  nav a {
    font-size: 1em;
    padding: 0.2em 0.4em;
  }
  main {
    max-width: 98vw;
    padding: 1em 0.5em;
  }
  .tab-container {
    flex-wrap: wrap;
    gap: 0.2em;
    font-size: 0.95em;
  }
  .tab-link {
    padding: 0.5em 0.7em;
    font-size: 1em;
  }
  iframe, img.plot-frame {
    min-width: 220px;
    width: 100%;
    height: 320px;
  }
}