* {
  box-sizing: border-box;
}

body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  margin: 0;
  padding: 2rem 1rem;
  background: linear-gradient(135deg, #f0f4f8 0%, #d9e2ec 100%);
  color: #1a202c;
  line-height: 1.5;
}

header h1 {
  margin-bottom: 1.5rem;
  font-size: 2rem;
  letter-spacing: -0.02em;
  color: #2d3748;
}

main {
  max-width: 960px;
  margin: 0 auto;
}

section {
  background: #ffffff;
  padding: 1.25rem;
  border-radius: 12px;
  margin-bottom: 1.25rem;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -1px rgba(0,0,0,0.03);
}

#selectors {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: flex-end;
}

#selectors label {
  font-weight: 600;
  font-size: 0.875rem;
  color: #4a5568;
  display: block;
  margin-bottom: 0.25rem;
}

select, input[type="text"] {
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  border: 1px solid #cbd5e0;
  background: #fff;
  font-size: 0.95rem;
  min-width: 160px;
}

button {
  padding: 0.5rem 1rem;
  border-radius: 8px;
  border: none;
  background: #3182ce;
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease;
}

button:hover {
  background: #2b6cb0;
}

button.danger {
  background: #e53e3e;
}

button.danger:hover {
  background: #c53030;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

#search {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

#search input {
  flex: 1;
  min-width: 200px;
}

#resource-title {
  margin-top: 0;
  font-size: 1.25rem;
  color: #2d3748;
}

#resource-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

#resource-list li {
  padding: 0.75rem 0.5rem;
  border-bottom: 1px solid #edf2f7;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.1s ease;
}

#resource-list li:hover {
  background: #f7fafc;
}

#resource-list li.selected {
  background: #ebf8ff;
  border-left: 3px solid #3182ce;
}

#resource-list li:last-child {
  border-bottom: none;
}

#pagination {
  margin-top: 1rem;
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

#actions pre {
  background: #1a202c;
  color: #e2e8f0;
  padding: 1rem;
  border-radius: 8px;
  overflow-x: auto;
  font-size: 0.85rem;
}

@media (max-width: 640px) {
  #selectors {
    flex-direction: column;
    align-items: stretch;
  }
  select, input[type="text"] {
    width: 100%;
  }
}