/* Critical CSS - Load this inline for above-the-fold content */
:root {
    --primary-600: #3b82f6;
    --primary-700: #2563eb;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-300: #d1d5db;
    --gray-700: #374151;
    --gray-900: #111827;
    --white: #ffffff;
    --text-base: 1rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
}

/* Critical base styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--gray-900);
    background-color: var(--gray-50);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* Critical button styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: var(--text-base);
    font-weight: 500;
    text-decoration: none;
    border: 1px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    min-height: 44px;
}

.btn-primary {
    background-color: var(--primary-600);
    color: var(--white);
    border-color: var(--primary-600);
}

.btn-primary:hover {
    background-color: var(--primary-700);
    border-color: var(--primary-700);
}

/* Critical form styles */
.form-input {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: var(--text-base);
    line-height: 1.5;
    color: var(--gray-900);
    background-color: var(--white);
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-lg);
    min-height: 44px;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-600);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Loading states */
.skeleton {
    background: linear-gradient(90deg, var(--gray-100) 25%, var(--gray-50) 50%, var(--gray-100) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Screen reader only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}