/* Explain: Base reset, typography, focus, and background star animation. - */
* {
    box-sizing: border-box;
}

html {
    background: var(--background-color);
    color: var(--text-color);
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    overflow-x: hidden;
    background-color: var(--background-color);
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(228, 193, 249, 0.12), transparent 40vw),
        radial-gradient(circle at 85% 30%, rgba(255, 209, 102, 0.1), transparent 40vw),
        radial-gradient(2px 2px at 20px 30px, #ffffff, rgba(0,0,0,0)),
        radial-gradient(2px 2px at 40px 70px, rgba(255,255,255,0.8), rgba(0,0,0,0)),
        radial-gradient(2px 2px at 90px 40px, rgba(255,255,255,0.6), rgba(0,0,0,0)),
        radial-gradient(2px 2px at 160px 120px, #ffffff, rgba(0,0,0,0)),
        radial-gradient(3px 3px at 250px 90px, rgba(255,215,0,0.5), rgba(0,0,0,0));
    background-repeat: repeat;
    background-size: 100% 100%, 100% 100%, 300px 300px, 300px 300px, 300px 300px, 300px 300px, 400px 400px;
    color: var(--text-color);
    font-family: var(--font-body);
    letter-spacing: 0.02em;
    animation: stars-twinkle 6s infinite alternate linear;
}

@keyframes stars-twinkle {
    0% { background-position: 0 0, 0 0, 0 0, 0 0, 0 0, 0 0, 0 0; }
    100% { background-position: 0 0, 0 0, -5px -5px, 5px 10px, -10px -5px, 10px 5px, -5px 15px; }
}

body.has-mobile-sticky {
    padding-bottom: 0;
}

h1, h2, h3, .brand-mark {
    font-family: var(--font-heading);
    letter-spacing: -0.01em;
}

img {
    max-width: 100%;
    display: block;
}

:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 4px;
}

::selection {
    background: var(--secondary-color);
    color: #fff;
}

@media (max-width: 767px) {
    body.has-mobile-sticky {
        padding-bottom: 96px;
    }
}