:root {
    --rojo: #e50914;
    --rojo-hover: #f6121d;
    --fondo: #141414;
    --fondo-elevado: #1f1f1f;
    --texto: #ffffff;
    --texto-secundario: #b3b3b3;
    --radius: 8px;
    --transition: 0.25s ease;
    --max-width: 1200px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    background-color: var(--fondo);
    color: var(--texto);
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    display: flex;
    flex-direction: column;
}

a {
    color: inherit;
}

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

/* ---------- Header ---------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: linear-gradient(rgba(20, 20, 20, 0.95), rgba(20, 20, 20, 0.75));
    backdrop-filter: blur(6px);
}

.site-header__inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 18px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: 2px;
    color: var(--rojo);
    text-decoration: none;
    text-transform: uppercase;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    color: var(--texto-secundario);
    text-decoration: none;
    transition: color var(--transition);
}

.back-link:hover {
    color: var(--texto);
}

/* ---------- Footer ---------- */
.site-footer {
    margin-top: auto;
    padding: 24px;
    text-align: center;
    color: var(--texto-secundario);
    font-size: 13px;
}

/* ---------- Focus ---------- */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--rojo);
    outline-offset: 2px;
}