body {
  margin: 0;
  font-family: system-ui, Arial;
  background: #f4f6f8;
  color: #333;
}

header {
  background: #1f2937;
  padding: 15px 30px;
  display: flex;
  gap: 20px;
}

header a {
  color: #fff;
  text-decoration: none;
  font-weight: 500;
}

header a:hover { text-decoration: underline; }

.container {
  max-width: 1200px;
  margin: 30px auto;
  padding: 20px;
}

.card {
  background: #fff;
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 25px;
  box-shadow: 0 4px 10px rgba(0,0,0,.08);
}

h1, h2 { margin-top: 0; }

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 10px;
  border-bottom: 1px solid #ddd;
}

th { background: #f0f0f0; }

input, select, button {
  padding: 8px;
  margin-top: 5px;
  width: 100%;
}

button {
  background: #2563eb;
  color: #fff;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

button:hover { background: #1e40af; }

.grid {
  display: grid;
  grid-te
	
.upload-btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: #2563eb;
    color: #fff;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.2s;
    margin-bottom: 1rem;
}

.upload-btn:hover {
    background-color: #1d4ed8;
}