/* Base CSS - Core Shared Styles */

/* Reset and normalize */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    line-height: 1.15;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
                'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
                sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.2s ease, color 0.2s ease;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    margin: 0;
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-primary);
}

p {
    margin: 0 0 1rem 0;
    line-height: 1.6;
}

a {
    color: var(--brand-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--brand-secondary);
}

/* Form elements */
input, textarea, select, button {
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    padding: 0;
    margin: 0;
}

/* Focus styles */
:focus {
    outline: 2px solid var(--brand-primary);
    outline-offset: 2px;
}

:focus:not(:focus-visible) {
    outline: none;
}

/* Utility classes */
.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;
}

.transition-colors {
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.transition-all {
    transition: all 0.2s ease;
}

/* Loading states */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Error states */
.error {
    color: var(--error-color, #ef4444);
}

.success {
    color: var(--success-color, #10b981);
}

.warning {
    color: var(--warning-color, #f59e0b);
}

/* Responsive images */
img {
    max-width: 100%;
    height: auto;
}

/* Print styles */
@media print {
    * {
        background: transparent !important;
        color: black !important;
        box-shadow: none !important;
        text-shadow: none !important;
    }
    
    a,
    a:visited {
        text-decoration: underline;
    }
    
    a[href]:after {
        content: " (" attr(href) ")";
    }
    
    abbr[title]:after {
        content: " (" attr(title) ")";
    }
    
    .no-print {
        display: none !important;
    }
}

/* Layout - Sticky Footer */
main {
    flex: 1;
}

.main-content {
    flex: 1;
}

/* Footer styling for sticky footer */
footer {
    margin-top: auto;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}