@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap');
body {
  margin: 0;
  font-family: 'Roboto', sans-serif;
  background: linear-gradient(to bottom right, #000046, #1cb5e0, #6f00ff);
  color: #fff;
  line-height: 1.6;
  overflow-x: hidden;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
}
header {
  position: relative;
  width: 100%;
  height: 300px;
  background: url(https://images.gptkong.com/demo/sample1.png) no-repeat center/cover,
              url(https://images.gptkong.com/demo/sample2.png) no-repeat right top/200px,
              linear-gradient(to right, #000046, #6f00ff);
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  overflow: hidden;
  margin-bottom: 40px;
}
header h1 {
  font-size: 3rem;
  text-align: center;
  position: relative;
  z-index: 2;
  animation: fadeIn 2s ease-out forwards;
}
header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1;
}
.card-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  width: 100%;
}
.card {
  background: linear-gradient(to bottom, #1a1a2e, #16213e);
  border-radius: 15px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
  padding: 20px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}
.card:hover {
  transform: translateY(-10px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}
.card img {
  width: 100%;
  height: auto;
  border-radius: 10px;
  margin-bottom: 15px;
}
.card h3 {
  font-size: 1.5rem;
  margin-bottom: 10px;
  position: relative;
}
.card p {
  font-size: 1rem;
  color: #d4d4d4;
}
.code-block {
  background: #00001a;
  border: 1px solid #1cb5e0;
  border-radius: 5px;
  padding: 15px;
  margin: 20px 0;
  position: relative;
  overflow-x: auto;
}
.code-block pre {
  font-family: 'Fira Code', monospace;
  font-size: 0.9rem;
  color: #1cb5e0;
  white-space: pre-wrap;
  word-break: break-word;
}
.table-container {
  overflow-x: auto;
  margin: 30px 0;
}
table {
  width: 100%;
  border-collapse: collapse;
  background: #1a1a2e;
  border: 1px solid #1cb5e0;
  border-radius: 5px;
}
th, td {
  padding: 10px 15px;
  text-align: left;
  border: 1px solid #1cb5e0;
}
th {
  background: #000046;
  color: #1cb5e0;
}
td {
  color: #d4d4d4;
}
.button {
  display: inline-block;
  background: linear-gradient(to right, #1cb5e0, #6f00ff);
  color: #fff;
  padding: 10px 20px;
  border-radius: 25px;
  text-decoration: none;
  font-weight: bold;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}
.button:hover {
  transform: scale(1.1);
  box-shadow: 0 8px 25px rgba(28, 181, 224, 0.5);
}
.button::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.5s ease, height 0.5s ease;
  z-index: -1;
}
.button:hover::before {
  width: 200%;
  height: 200%;
}
@media (max-width: 768px) {
  header {
    height: 200px;
  }
  .card {
    padding: 15px;
  }
  .code-block pre {
    font-size: 0.8rem;
  }
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}