:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: #f4f6fb;
  color: #1f2937;
}

body {
  margin: 0;
}

.page {
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 16px 64px;
  box-sizing: border-box;
}

.header h1 {
  margin: 0;
  font-size: 28px;
}

.header p {
  margin-top: 8px;
  color: #6b7280;
}

.panel {
  margin-top: 24px;
  background-color: #fff;
  border-radius: 12px;
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.08);
  padding: 24px;
}

.panel h2 {
  margin: 0 0 16px;
  font-size: 20px;
}

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

.form .field,
.card .field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

label {
  font-size: 14px;
  color: #4b5563;
}

input,
textarea {
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid #d1d5db;
  font-size: 14px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input:focus,
textarea:focus {
  outline: none;
  border-color: #4f46e5;
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

textarea {
  min-height: 72px;
  resize: vertical;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 16px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  background-color: #e5e7eb;
  color: #1f2937;
  font-size: 14px;
  transition: background-color 0.2s ease, transform 0.1s ease;
}

.btn:hover {
  background-color: #d1d5db;
}

.btn:active {
  transform: translateY(1px);
}

.btn.primary {
  background: linear-gradient(135deg, #4f46e5, #2563eb);
  color: #fff;
}

.btn.primary:hover {
  background: linear-gradient(135deg, #4338ca, #1d4ed8);
}

.btn.danger {
  background: #ef4444;
  color: #fff;
}

.btn.danger:hover {
  background: #dc2626;
}

.card-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.card {
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 16px 20px;
  background-color: #fff;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.card-id {
  font-size: 12px;
  color: #6b7280;
}

.card-actions {
  display: flex;
  gap: 12px;
}

.placeholder,
.error {
  text-align: center;
  color: #6b7280;
  padding: 24px 0;
}

.error {
  color: #ef4444;
}

@media (max-width: 640px) {
  .card {
    padding: 16px;
  }

  .panel {
    padding: 20px;
  }

  .page {
    padding: 24px 12px 48px;
  }
}