/* Global design tokens and element defaults. */
:root {
    --primary-color: #0969da;
    --primary-hover: #0558b5;
    --secondary-color: #0d1117;
    --background-color: #ffffff;
    --surface-color: #f6f8fa;
    --surface-subtle: #f1f5f9;
    --text-primary: #1f2328;
    --text-secondary: #57606a;
    --border-color: #d0d7de;
    --border-subtle: #eaeef2;
    --success-color: #1a7f37;
    --shadow-sm: 0 1px 2px rgba(31, 35, 40, 0.04);
    --shadow-md: 0 12px 28px rgba(31, 35, 40, 0.1);
    --header-height: 76px;
}

html { scroll-behavior: smooth; }

body {
    min-width: 320px;
    overflow-x: hidden;
    font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: var(--text-primary);
    background: var(--background-color);
    line-height: 1.6;
}

a { color: inherit; }

:focus-visible {
    outline: 3px solid rgba(9, 105, 218, 0.45);
    outline-offset: 3px;
}

.skip-link {
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 1100;
    padding: 0.65rem 0.85rem;
    color: #fff;
    background: var(--primary-color);
    border-radius: 0.4rem;
    transform: translateY(-200%);
}

.skip-link:focus { transform: translateY(0); }