body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #0f172a;
  color: #f8fafc;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 30px 20px;
}

header {
  margin-bottom: 30px;
}

header h1 {
  margin: 0 0 8px;
  font-size: 32px;
}

header p {
  margin: 0;
  color: #cbd5e1;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 30px;
}

.card,
.panel,
.item {
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: 12px;
}

.card {
  padding: 20px;
  text-align: center;
}

.card h2 {
  margin: 0 0 10px;
  font-size: 28px;
}

.panel {
  padding: 20px;
  margin-bottom: 20px;
}

.panel h3 {
  margin-top: 0;
}

.item {
  padding: 14px;
  margin-bottom: 12px;
}

.item:last-child {
  margin-bottom: 0;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.form-grid input,
.form-grid button {
  padding: 12px;
  border-radius: 8px;
  border: 1px solid #475569;
  font-size: 14px;
}

.form-grid input {
  background: #0f172a;
  color: #f8fafc;
}

.form-grid button {
  background: #2563eb;
  color: white;
  cursor: pointer;
  border: none;
}

.form-grid button:hover {
  background: #1d4ed8;
}

#form-message {
  margin-top: 12px;
  color: #93c5fd;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.panel-header select {
  padding: 10px;
  border-radius: 8px;
  background: #0f172a;
  color: #f8fafc;
  border: 1px solid #475569;
}