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

html {
  background: #667eea;
}

body {
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu,
    Cantarell, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  padding: 2rem;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  background: white;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

/* Utility Classes */
.hidden {
  display: none;
}
.flex {
  display: flex;
}
.flex-col {
  flex-direction: column;
}
.grid {
  display: grid;
}
.grid-cols-auto {
  grid-template-columns: 1fr auto;
}
.gap-1 {
  gap: 0.5rem;
}
.gap-2 {
  gap: 1rem;
}
.gap-x-2 {
  column-gap: 1rem;
}
.col-span-full {
  grid-column: 1 / -1;
}
.items-center {
  align-items: center;
}
.justify-center {
  justify-content: center;
}
.inline-block {
  display: inline-block;
}

.text-center {
  text-align: center;
}
.text-bold {
  font-weight: 600;
}
.text-sm {
  font-size: 0.9rem;
}
.text-xs {
  font-size: 0.85rem;
}

.p-1 {
  padding: 1rem;
}
.p-2 {
  padding: 2rem;
}
.mb-1 {
  margin-bottom: 1rem;
}
.mb-1_5 {
  margin-bottom: 1.5rem;
}
.mt-1 {
  margin-top: 1rem;
}
.m-0 {
  margin: 0;
}

.border {
  border: 1px solid #e0e0e0;
}
.rounded {
  border-radius: 4px;
}
.shadow {
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}
.shadow-lg {
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.text-gray-300 {
  color: #333;
}
.text-gray-400 {
  color: #444;
}
.text-gray-600 {
  color: #666;
}
.text-red {
  color: #c33;
}
.text-blue {
  color: #667eea;
}
.bg-red-light {
  background: #fee;
}

.font-mono {
  font-family: "Courier New", monospace;
}
.bg-transparent {
  background: transparent;
}
.leading-normal {
  line-height: 1.5;
}
.transition {
  transition: box-shadow 0.2s;
}

.hover\:shadow:hover {
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.list-none {
  list-style: none;
}