:root {
  --color-primary: #2563eb;
  --color-success: #16a34a;
  --color-warning: #ea580c;
  --color-danger: #dc2626;
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-text: #1e293b;
  --radius-md: 12px;
  --shadow-sm: 0 6px 16px rgba(15, 23, 42, 0.08);
  --transition-fast: 0.2s ease;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
}

button {
  font: inherit;
  border: none;
  cursor: pointer;
  border-radius: var(--radius-md);
  padding: 0.65rem 1.2rem;
  background: var(--color-primary);
  color: #fff;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

button:hover {
  background: #1d4ed8;
  transform: translateY(-1px);
}

button.secondary {
  background: var(--color-text);
}

button.success {
  background: var(--color-success);
}

button.danger {
  background: var(--color-danger);
}

input, select, textarea {
  font: inherit;
  width: 100%;
  padding: 0.7rem 0.8rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(15, 23, 42, 0.12);
  background: #fff;
}

form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

dialog::backdrop {
  background: rgba(15, 23, 42, 0.5);
}

.dialog-panel {
  border: none;
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  width: min(480px, 90vw);
  max-height: 90vh;
}

@media (max-width: 768px) {
  button {
    width: 100%;
    padding: 1rem 1.5rem;
    min-height: 48px;
    font-size: 1.1rem;
  }
}