html {
    font-family: var(--font-sans);
    font-size: var(--fs-base);
    line-height: var(--lh-normal);
    color: var(--text-primary);
    background: var(--bg-app);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body { font-family: inherit; color: inherit; background: inherit; }

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--fw-semibold);
    line-height: var(--lh-tight);
    letter-spacing: var(--ls-tight);
    color: var(--text-primary);
}

h1 { font-size: var(--fs-3xl); }
h2 { font-size: var(--fs-2xl); }
h3 { font-size: var(--fs-xl); }
h4 { font-size: var(--fs-lg); }
h5 { font-size: var(--fs-md); }
h6 { font-size: var(--fs-base); }

p { line-height: var(--lh-relaxed); color: var(--text-primary); }
small { font-size: var(--fs-sm); color: var(--text-secondary); }
strong, b { font-weight: var(--fw-semibold); }

code, pre, kbd, samp { font-family: var(--font-mono); font-size: 0.9em; }

code {
    background: var(--bg-subtle);
    padding: 2px 6px;
    border-radius: var(--radius-xs);
    color: var(--accent-text);
}

pre {
    background: var(--bg-subtle);
    padding: var(--space-4);
    border-radius: var(--radius-md);
    overflow-x: auto;
    line-height: var(--lh-normal);
}

pre code { background: none; padding: 0; color: inherit; }

a {
    color: var(--accent-text);
    transition: color var(--duration-fast) var(--ease);
}
a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
    text-underline-offset: 2px;
}
a:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
    border-radius: var(--radius-xs);
}

:focus-visible { outline: 2px solid var(--accent-primary); outline-offset: 2px; }
button:focus:not(:focus-visible),
a:focus:not(:focus-visible) { outline: none; }

::selection {
    background: var(--accent-primary);
    color: var(--text-inverse);
}

* {
    scrollbar-width: thin;
    scrollbar-color: var(--border-strong) transparent;
}

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: var(--border-strong);
    border-radius: var(--radius-full);
    border: 2px solid var(--bg-app);
}
::-webkit-scrollbar-thumb:hover { background: var(--text-tertiary); }

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.hidden { display: none !important; }

.no-select { user-select: none; -webkit-user-select: none; }

.truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.clamp-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

@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;
    }
}