/* === CONFIGURACIÓN BASE === */
:root {
    --color-bg-scroll: #ffffff;
    --color-thumb-scroll: #000000;
}

/* Cuando el modo oscuro está activo (clase 'dark' en el HTML) */
.dark {
    --color-bg-scroll: #000000;
    --color-thumb-scroll: #ffffff;
}

/* === SCROLLBAR PERSONALIZADO === */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-scroll);
}

::-webkit-scrollbar-thumb {
    background: var(--color-thumb-scroll);
    border-radius: 4px;
    border: 1px solid var(--color-bg-scroll);
}

/* === SIDEBAR (MENÚ LATERAL) === */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 40;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease-in-out;
}

.sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
}

.sidebar-menu {
    position: fixed;
    top: 0;
    left: 0;
    height: 100%;
    width: 280px;
    z-index: 50;
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 4px 0 24px rgba(0,0,0,0.1);
}

.sidebar-menu.active {
    transform: translateX(0);
}

/* === UTILIDADES === */
.fade-in {
    animation: fadeIn 0.5s ease-in-out forwards;
}

.slide-up {
    animation: slideUp 0.4s ease-out forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}