*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    color: var(--text-primary);
    background: var(--bg-body);
    line-height: 1.6;
}


h1 { font-size: 26px; font-weight: 700; letter-spacing: -0.025em; line-height: 1.2; }
h2 { font-size: 20px; font-weight: 600; letter-spacing: -0.02em; line-height: 1.3; }
h3 { font-size: 16px; font-weight: 600; letter-spacing: -0.01em; }
h4 { font-size: 14px; font-weight: 600; }


.sidebar::-webkit-scrollbar {
    width: 4px;
}

.sidebar::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,.1);
    border-radius: 2px;
}


:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

.btn:focus-visible {
    box-shadow: 0 0 0 3px rgba(43,232,114,.3);
}


a[target="_blank"]::after {
    content: '';
    display: inline-block;
    width: 10px;
    height: 10px;
    margin-left: 3px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6'/%3E%3Cpolyline points='15 3 21 3 21 9'/%3E%3Cline x1='10' y1='14' x2='21' y2='3'/%3E%3C/svg%3E");
    background-size: contain;
    opacity: 0.5;
    vertical-align: middle;
}

.sidebar-link[target="_blank"]::after,
.btn[target="_blank"]::after {
    display: none;
}


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