body {
    font-family: system-ui, -apple-system, sans-serif;
    background-color: #f9fafb;
    margin: 0;
    padding: 0;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.dark body {
    background-color: #111827;
    color: #f3f4f6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

.app-container {
    min-height: 100vh;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    background-color: #f9fafb;
    padding: 2rem 1rem;
}

.dark .app-container {
    background-color: #111827;
}

/* Dark mode styles */
.dark .bg-gray-50 {
    background-color: #111827;
}

.dark .text-gray-600 {
    color: #9ca3af;
}

.dark .bg-red-50 {
    background-color: #991b1b;
}

.dark .text-red-600 {
    color: #fca5a5;
}

.dark .border-red-200 {
    border-color: #ef4444;
}

/* Text colors */
.dark .text-gray-800 {
    color: #f3f4f6;
}

.dark .text-gray-600 {
    color: #9ca3af;
}

/* Backgrounds */
.dark .bg-white {
    background-color: #1f2937;
}

.dark .bg-gray-50 {
    background-color: #111827;
}

/* Borders */
.dark .border-gray-200 {
    border-color: #374151;
}

.dark .border-gray-300 {
    border-color: #4b5563;
}