/* ── Filtro Neumáticos v2 ───────────────────────────────────────────────── */
:root {
    --fn-primario:  #e8000a;   /* rojo fuerte */
    --fn-hover:     #ff1a22;
    --fn-texto:     #ffffff;
    --fn-subtexto:  #bbbbbb;
    --fn-borde:     #333333;
    --fn-fondo:     #1a1a1a;
    --fn-fondo-tag: #242424;
    --fn-radio:     6px;
}

/* ── Contenedor principal ─────────────────────────────────────────────── */
.fn-filtro {
    background: var(--fn-fondo);
    border: 1px solid var(--fn-borde);
    border-radius: var(--fn-radio);
    padding: 22px 18px;
    font-family: inherit;
    color: var(--fn-texto);
}

.fn-grupo { margin-bottom: 24px; }

/* ── Títulos de sección ───────────────────────────────────────────────── */
.fn-titulo {
    font-size: 11px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: .12em;
    color: var(--fn-texto);
    margin: 0 0 12px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--fn-primario);
    display: flex;
    align-items: center;
    gap: 7px;
}

/* ── Checkboxes tipo de uso ───────────────────────────────────────────── */
.fn-lista {
    list-style: none !important;
    margin: 0 !important;
    padding: 0 !important;
}
.fn-lista li {
    margin-bottom: 9px !important;
    list-style: none !important;
}
.fn-lista li::before { display: none !important; }

.fn-check {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 13px;
    color: var(--fn-subtexto);
    transition: color .15s;
    line-height: 1;
}
.fn-check:hover { color: var(--fn-texto); }

/* Checkbox custom */
.fn-check input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    width: 17px;
    height: 17px;
    border: 2px solid #555;
    border-radius: 3px;
    background: transparent;
    cursor: pointer;
    position: relative;
    flex-shrink: 0;
    transition: border-color .15s, background .15s;
}
.fn-check input[type="checkbox"]:checked {
    background: var(--fn-primario);
    border-color: var(--fn-primario);
}
.fn-check input[type="checkbox"]:checked::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #fff;
    font-size: 11px;
    font-weight: 900;
    line-height: 1;
}
.fn-check input[type="checkbox"]:checked + span {
    color: var(--fn-texto);
}

/* ── Tags aro ─────────────────────────────────────────────────────────── */
.fn-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
}
.fn-tag {
    background: var(--fn-fondo-tag);
    border: 1.5px solid var(--fn-borde);
    border-radius: 4px;
    padding: 6px 13px;
    font-size: 12px;
    font-weight: 700;
    color: var(--fn-subtexto);
    cursor: pointer;
    transition: all .15s;
    line-height: 1;
}
.fn-tag:hover {
    border-color: var(--fn-primario);
    color: var(--fn-texto);
}
.fn-tag.activo {
    background: var(--fn-primario);
    border-color: var(--fn-primario);
    color: #fff;
}

/* ── Radios posición ──────────────────────────────────────────────────── */
.fn-radio-group {
    display: flex;
    flex-direction: column;
    gap: 9px;
}
.fn-radio {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 13px;
    color: var(--fn-subtexto);
    transition: color .15s;
}
.fn-radio:hover { color: var(--fn-texto); }

.fn-radio input[type="radio"] {
    appearance: none;
    -webkit-appearance: none;
    width: 17px;
    height: 17px;
    border: 2px solid #555;
    border-radius: 50%;
    background: transparent;
    cursor: pointer;
    position: relative;
    flex-shrink: 0;
    transition: border-color .15s;
}
.fn-radio input[type="radio"]:checked {
    border-color: var(--fn-primario);
}
.fn-radio input[type="radio"]:checked::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 8px;
    height: 8px;
    background: var(--fn-primario);
    border-radius: 50%;
}
.fn-radio input[type="radio"]:checked + span {
    color: var(--fn-texto);
}

/* ── Botones ──────────────────────────────────────────────────────────── */
.fn-acciones {
    display: flex;
    gap: 8px;
    margin-top: 6px;
}
.fn-btn-filtrar, .fn-btn-reset {
    flex: 1;
    padding: 11px 10px;
    border: none;
    border-radius: var(--fn-radio);
    font-size: 12px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: .06em;
    cursor: pointer;
    transition: all .18s;
}
.fn-btn-filtrar {
    background: var(--fn-primario);
    color: #fff;
}
.fn-btn-filtrar:hover {
    background: var(--fn-hover);
    transform: translateY(-1px);
}
.fn-btn-reset {
    background: transparent;
    color: var(--fn-subtexto);
    border: 1.5px solid var(--fn-borde);
}
.fn-btn-reset:hover {
    border-color: #666;
    color: var(--fn-texto);
}

/* ── Resultados ───────────────────────────────────────────────────────── */
#fn-resultados {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    transition: opacity .2s;
}
#fn-resultados.fn-cargando { opacity: .35; pointer-events: none; }

.fn-producto {
    background: #1a1a1a;
    border: 1px solid #2a2a2a;
    border-radius: var(--fn-radio);
    overflow: hidden;
    transition: box-shadow .2s, border-color .2s;
}
.fn-producto:hover {
    box-shadow: 0 4px 20px rgba(232,0,10,.18);
    border-color: var(--fn-primario);
}
.fn-producto img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    display: block;
}
.fn-prod-info {
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 5px;
}
.fn-sku {
    font-size: 10px;
    color: #666;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .08em;
}
.fn-prod-nombre {
    font-size: 12px;
    font-weight: 600;
    color: #ccc;
    text-decoration: none;
    line-height: 1.35;
}
.fn-prod-nombre:hover { color: #fff; }
.fn-precio {
    font-size: 16px;
    font-weight: 800;
    color: var(--fn-primario);
}
.fn-btn-ver {
    display: block;
    text-align: center;
    background: var(--fn-primario);
    color: #fff !important;
    padding: 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: .06em;
    text-decoration: none;
    margin-top: 4px;
    transition: background .18s;
}
.fn-btn-ver:hover { background: var(--fn-hover); }

#fn-count {
    font-size: 12px;
    color: #666;
    margin-bottom: 14px;
    min-height: 20px;
    text-transform: uppercase;
    letter-spacing: .06em;
}
.fn-sin-resultados {
    color: #555;
    font-size: 14px;
    grid-column: 1/-1;
    padding: 40px 0;
    text-align: center;
}