* {
 box-sizing: border-box;
 margin: 0;
 padding: 0;
}
body {
 font-family: 'Quicksand', sans-serif;
 background-color: #fdfdfd;
 color: #222;
}
.container {
 max-width: 960px;
 margin: 0 auto;
 padding: 20px;
}
header {
 background-color: #ffffff;
 padding: 20px;
 text-align: center;
 border-radius: 10px;
 margin-bottom: 20px;
 box-shadow: 0 0 5px rgba(0,0,0,0.1);
}
.back-btn {
  position: absolute;
  top: 20px;
  left: 20px;
  padding: 10px 20px;
  background-color: white;
  border: 2px solid black;
  border-radius: 25px;
  font-size: 1rem;
  font-family: 'Quicksand', sans-serif;
  text-decoration: none;
  color: black;
  display: inline-block;
  transition: background-color 0.3s ease;
}

.back-btn:hover {
  background-color: #f0f0f0;
}
.main-area {
 display: flex;
 gap: 20px;
}
.sidebar {
 flex: 1;
 background-color: #f8f8f8;
 padding: 20px;
 border-radius: 10px;
 border: 1px solid #000;
}
.sidebar h3 {
 margin-bottom: 10px;
}
.sidebar ul {
 list-style: none;
}
.sidebar li {
 margin-bottom: 8px;
}
.sdg-area {
 flex: 3;
 display: grid;
 grid-template-columns: 1fr;
 gap: 20px;
}
.sdg-box {
 padding: 15px;
 border: 2px solid black;
 border-radius: 12px;
 box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}
.sdg-box h2 {
 font-size: 1.1rem;
 margin-bottom: 8px;
}
.sdg-box p {
 font-size: 0.95rem;
 line-height: 1.4;
}

.sdg1  { background-color: #fbe6e9; }
.sdg2  { background-color: #fff4d1; }
.sdg3  { background-color: #daf5dc; }
.sdg4  { background-color: #fbe6e9; }
.sdg5  { background-color: #ffe5e1; }
.sdg6  { background-color: #d8f3fc; }
.sdg7  { background-color: #fff9d1; }
.sdg8  { background-color: #f8d1dc; }
.sdg9  { background-color: #ffe7d6; }
.sdg10 { background-color: #fbd7e5; }
.sdg11 { background-color: #ffe7c2; }
.sdg12 { background-color: #f1e4cf; }
.sdg13 { background-color: #d6eadf; }
.sdg14 { background-color: #d6effc; }
.sdg15 { background-color: #e0f5d1; }
.sdg16 { background-color: #cfe9f5; }
.sdg17 { background-color: #d5dfea; }
footer {
 background-color: #f0f0f0;
 text-align: center;
 padding: 15px;
 margin-top: 30px;
 border-radius: 10px;
 border: 1px solid #000;
}