/* Explain: Base reset and typography defaults. */
* {
    box-sizing: border-box;
}

html {
    background: var(--background-color);
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    overflow-x: hidden;
    background: var(--background-color);
    color: var(--text-color);
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

body.em-no-scroll {
    overflow: hidden;
}

h1, h2, h3, h4 {
    margin: 0;
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -.01em;
}

p {
    margin: 0;
}

a {
    color: inherit;
    text-decoration: none;
}

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

button {
    font-family: inherit;
}

:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 3px;
    border-radius: 2px;
}

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

/* Animaciones sutiles de aparición */
html.js [data-reveal] {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity .7s ease, transform .7s ease;
}

html.js [data-reveal].is-visible {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    html.js [data-reveal],
    html.js [data-reveal].is-visible {
        opacity: 1;
        transform: none;
        transition: none;
    }
}