src/app.css

/* src/app.css */
:root {
  --gr-df-table-bg-even: #ffffff;
  --gr-df-table-bg-odd: #f9fafb;
  --gr-df-copied-cell-color: #fef3c7;
  --gr-df-table-border: #e5e7eb;
  --gr-df-table-text: #111827;
  --gr-df-accent: #667eea;
  --gr-df-accent-soft: #eef2ff;
  --gr-df-font-size: 14px;
  --gr-df-font-mono: 'Fira Code', 'Monaco', 'Courier New', monospace;
  --gr-df-font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --gr-df-table-radius: 8px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--gr-df-font-sans);
  font-size: var(--gr-df-font-size);
  color: var(--gr-df-table-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  transition: all 0.2s ease;
}

button:hover {
  transform: translateY(-1px);
}

button:active {
  transform: translateY(0);
}

input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

code {
  font-family: var(--gr-df-font-mono);
  background: #f3f4f6;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}

.card {
  background: white;
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  transition: box-shadow 0.2s ease;
}

.card:hover {
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.btn {
  background: var(--gr-df-accent);
  color: white;
  border: none;
  padding: 0.625rem 1.25rem;
  border-radius: 8px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.2s ease;
}

.btn:hover {
  background: #5a67d8;
  box-shadow: 0 4px 6px rgba(102, 126, 234, 0.25);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-secondary {
  background: #f3f4f6;
  color: #374151;
}

.btn-secondary:hover {
  background: #e5e7eb;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.input-group label {
  font-weight: 500;
  color: #374151;
  font-size: 0.875rem;
}

.input-group input,
.input-group select {
  padding: 0.5rem 0.75rem;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  background: white;
  transition: border-color 0.2s ease;
}

.input-group input:focus,
.input-group select:focus {
  outline: none;
  border-color: var(--gr-df-accent);
  box-shadow: 0 0 0 3px var(--gr-df-accent-soft);
}

.switch {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  user-select: none;
}

.switch input[type="checkbox"] {
  width: 2.5rem;
  height: 1.25rem;
  appearance: none;
  background: #d1d5db;
  border-radius: 9999px;
  position: relative;
  cursor: pointer;
  transition: background 0.2s ease;
}

.switch input[type="checkbox"]:checked {
  background: var(--gr-df-accent);
}

.switch input[type="checkbox"]::after {
  content: '';
  position: absolute;
  width: 1rem;
  height: 1rem;
  background: white;
  border-radius: 50%;
  top: 0.125rem;
  left: 0.125rem;
  transition: transform 0.2s ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.switch input[type="checkbox"]:checked::after {
  transform: translateX(1.25rem);
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}