body {
  font-family: system-ui, sans-serif;
  max-width: 900px;
  margin: 40px auto;
  padding: 0 20px;
  background: #161924;
  color: #d7d8d9;
}

h1 { text-align: center; }

.card {
  background: rgb(141, 149, 198);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.1);
}

input {
  padding: 8px;
  margin-right: 8px;
  border: 1px solid #131727;
  border-radius: 6px;
}

button {
  padding: 8px 14px;
  border: none;
  border-radius: 6px;
  background: #5e79b4;
  color: white;
  cursor: pointer;
  margin-right: 6px;
}

button:hover { background: #556ba7; }

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
}

th, td {
  text-align: left;
  padding: 8px;
  border-bottom: 1px solid #eee;
}

.positive { color: #16a34a; font-weight: bold; }
.negative { color: #dc2626; font-weight: bold; }

.hint { font-size: 13px; color: #666; }

.portfolio-item {
  padding: 10px;
  border: 1px solid #eee;
  border-radius: 6px;
  margin-bottom: 8px;
  cursor: pointer;
}

.portfolio-item:hover { background: #f0f4ff; }