/* Base Styles */
:root {
    color-scheme: light dark;
}

/* Base Styles */
html {
    font-size: 16px;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    margin: 0;
    font-family: var(--font-body), system-ui, -apple-system, sans-serif;
    line-height: 1.5;
    background: var(--color-background);
    color: var(--color-text);
    transition: background-color var(--transition-speed) var(--transition-ease),
                color var(--transition-speed) var(--transition-ease);
}

/* Theme transitions for common elements */
button,
input,
select,
a {
    transition: color var(--transition-speed) var(--transition-ease),
                background-color var(--transition-speed) var(--transition-ease),
                border-color var(--transition-speed) var(--transition-ease),
                box-shadow var(--transition-speed) var(--transition-ease);
}

/* Disable transitions when user prefers reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        transition: none !important;
        animation: none !important;
    }
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading), system-ui, -apple-system, sans-serif;
    line-height: 1.2;
    margin-top: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

/* Toast Notifications */
.toast {
    position: fixed;
    bottom: var(--space-4);
    left: 50%;
    transform: translateX(-50%);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    background: var(--color-surface);
    box-shadow: var(--shadow-md);
    font-size: var(--font-size-sm);
    opacity: 0;
    animation: toast 3s ease;
    z-index: 1000;
}

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

.toast.error {
    background: var(--color-error);
    color: white;
}

@keyframes toast {
    0% { opacity: 0; transform: translate(-50%, 100%); }
    20% { opacity: 1; transform: translate(-50%, 0); }
    80% { opacity: 1; transform: translate(-50%, 0); }
    100% { opacity: 0; transform: translate(-50%, 0); }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    .toast {
        animation: none;
        opacity: 1;
    }
}

/* Print Styles */
@media print {
    .toast {
        display: none;
    }
}