/* ============================================================
   AstroSeec — Cambio de diseño
   Estilo del botón toggle en la navegación y de las capas de
   efectos; los colores de cada diseño viven en themes/t-<id>.css
   ============================================================ */

/* ---- Botón en la navegación (junto a Contacto) ---- */
.rvz-nav-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    border: 1px solid var(--line-light);
    border-radius: 999px;
    background: transparent;
    color: var(--soft);
    font-family: var(--body);
    font-size: 14px;
    font-weight: 500;
    white-space: nowrap;
    cursor: pointer;
    transition: color .2s, background .2s, border-color .2s, transform .2s;
}
.rvz-nav-btn svg { flex: none; }
.rvz-nav-btn:hover {
    color: var(--paper);
    background: rgba(241, 236, 225, 0.08);
    transform: translateY(-1px);
}
.rvz-nav-btn:active { transform: scale(.97); }
.rvz-nav-btn.on { border-color: var(--brass); color: var(--paper); }
.rvz-nav-btn:focus-visible { outline: 2px solid var(--brass); outline-offset: 3px; }

@media (max-width: 760px) {
    .rvz-nav-btn { padding: 10px 12px; font-size: 13.5px; }
}
@media (max-width: 480px) {
    .rvz-nav-btn span { display: none; } /* solo el dado, como la marca */
    .rvz-nav-btn { padding: 9px 11px; }
}

/* ---- Capas de efectos por tema (las activa themes.js) ---- */
.theme-fx {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}
.fx-grain {
    position: fixed;
    inset: 0;
    z-index: 98;
    pointer-events: none;
    mix-blend-mode: multiply;
}
.fx-star, .fx-mote {
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
}
.fx-star { background: #fff; animation: rvzTw 3s ease-in-out infinite; }
@keyframes rvzTw { 0%, 100% { opacity: .15; } 50% { opacity: .95; } }

.fx-mote {
    width: 3px; height: 3px;
    background: rgba(255, 226, 180, .85);
    box-shadow: 0 0 6px rgba(255, 210, 150, .9);
    animation: rvzRise linear infinite;
}
@keyframes rvzRise {
    from { transform: translate(0, 0); opacity: 0; }
    10% { opacity: .9; }
    to { transform: translate(var(--dx, 30px), -72vh); opacity: 0; }
}

.fx-sky {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(40, 114, 212, .55) 0%, rgba(103, 170, 235, .4) 45%, rgba(255, 207, 122, .45) 100%);
    animation: rvzSky 22s ease-in-out infinite alternate;
}
@keyframes rvzSky {
    0% { opacity: .9; }
    48% { opacity: .25; }
    100% { opacity: .05; }
}

.theme-fx canvas { position: absolute; inset: 0; width: 100%; height: 100%; }

@media (prefers-reduced-motion: reduce) {
    .fx-star, .fx-mote, .fx-sky { animation: none !important; }
}