/* --------------------------------------------------------------------------
   Base
-------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 16px;
    line-height: 1.55;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
    transition: background var(--transition), color var(--transition);
}

/* Animated gradient behind everything */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    background: var(--gradient-bg);
    background-size: 300% 300%;
    animation: bgMove 20s ease infinite;
    z-index: -2;
    transition: background var(--transition);
}
body::after {
    content: "";
    position: fixed;
    inset: 0;
    background:
        radial-gradient(circle at 15% 20%, rgba(43, 108, 176, 0.18), transparent 35%),
        radial-gradient(circle at 85% 12%, rgba(176, 111, 43, 0.15), transparent 40%),
        radial-gradient(circle at 75% 80%, rgba(117, 160, 204, 0.20), transparent 40%);
    opacity: var(--ambient-alpha);
    z-index: -1;
    pointer-events: none;
    transition: opacity var(--transition);
}
@keyframes bgMove {
    0%   { background-position: 0 50%; }
    50%  { background-position: 100% 50%; }
    100% { background-position: 0 50%; }
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.15;
    margin: 0;
    color: var(--text);
}
p { margin: 0; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }

/* Focus (A11Y-002) */
a:focus-visible,
button:focus-visible,
.btn:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 3px;
    border-radius: 4px;
}

/* Skip link (A11Y-005) */
.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    padding: var(--space-sm) var(--space-md);
    background: var(--color-ink);
    color: #F7FAFC;
    font-size: 14px;
    border-radius: 4px;
    z-index: 200;
}
.skip-link:focus { left: var(--space-md); top: var(--space-md); }