/**
 * Sidebar y menú lateral
 */

.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.3);
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

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

.sidebar-menu {
    position: fixed;
    top: 0;
    left: -350px;
    width: 350px;
    height: 100%;
    background-color: var(--bg-primary);
    border-right: 1px solid var(--border-color);
    z-index: 999;
    transition: left var(--transition-normal);
    overflow-y: auto;
}

.sidebar-menu.active {
    left: 0;
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
}

.sidebar-header h2 {
    font-size: 1.2rem;
    font-weight: 400;
    letter-spacing: 2px;
}

.sidebar-close {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 2rem;
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity var(--transition-normal);
}

.sidebar-close:hover {
    opacity: 0.7;
}

.sidebar-content {
    padding: 1.5rem;
}

.filter-section {
    margin-bottom: 2rem;
}

.filter-title {
    font-size: 1rem;
    font-weight: 400;
    letter-spacing: 1px;
    margin-bottom: 1rem;
    color: var(--text-secondary);
    text-transform: uppercase;
}

/* Títulos expandibles */
.filter-title-expandable {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
    transition: color 0.3s;
}

.filter-title-expandable:hover {
    color: var(--text-primary);
}

.filter-title-expandable .expand-icon {
    transition: transform 0.3s;
    font-size: 24px;
}

.filter-title-expandable.expanded .expand-icon {
    transform: rotate(180deg);
}

/* Opciones colapsables */
.filter-options-collapsible {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.filter-options-collapsible.expanded {
    max-height: 1000px;
}

/* Subsecciones dentro de filtros */
.filter-subsection {
    margin-top: 1rem;
    padding-top: 1rem;
}

.filter-subsection:first-child {
    margin-top: 0;
    padding-top: 0;
}

.filter-subtitle {
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    text-transform: uppercase;
}

/* Grid para talles numéricos */
.numeric-sizes-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
}

.numeric-sizes-grid .filter-option {
    padding: 0.5rem;
    text-align: center;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    transition: all 0.3s;
}

.numeric-sizes-grid .filter-option:hover {
    background: var(--hover-bg);
}

.numeric-sizes-grid .filter-option input:checked + span {
    font-weight: 600;
}

.numeric-sizes-grid .filter-option span {
    font-size: 0.9rem;
}

.filter-options {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.filter-option {
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-normal);
    position: relative;
}

.filter-option:hover {
    background-color: var(--hover-bg);
}

/* Ocultar inputs nativos */
.filter-option input[type="radio"],
.filter-option input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    width: 0;
    height: 0;
}

/* Container para checkbox/radio personalizado */
.filter-option input[type="radio"] + span::before,
.filter-option input[type="checkbox"] + span::before {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    margin-right: 0.75rem;
    border: 2px solid var(--border-color);
    background-color: transparent;
    transition: all var(--transition-normal);
    vertical-align: middle;
    position: relative;
    flex-shrink: 0;
}

/* Radio button - círculo */
.filter-option input[type="radio"] + span::before {
    border-radius: 50%;
}

/* Checkbox - cuadrado */
.filter-option input[type="checkbox"] + span::before {
    border-radius: 4px;
}

/* Estado hover */
.filter-option:hover input[type="radio"] + span::before,
.filter-option:hover input[type="checkbox"] + span::before {
    border-color: var(--text-primary);
    background-color: rgba(0, 0, 0, 0.03);
}

/* Estado checked - radio */
.filter-option input[type="radio"]:checked + span::before {
    border-color: var(--text-primary);
    background-color: var(--text-primary);
    box-shadow: inset 0 0 0 4px var(--bg-primary);
}

/* Estado checked - checkbox */
.filter-option input[type="checkbox"]:checked + span::before {
    border-color: var(--text-primary);
    background-color: var(--text-primary);
}

/* Checkmark para checkbox */
.filter-option input[type="checkbox"]:checked + span::after {
    content: '';
    position: absolute;
    left: 1rem;
    top: 45%;
    transform: translateY(-50%) rotate(45deg);
    width: 6px;
    height: 11px;
    border: solid var(--bg-primary);
    border-width: 0 2px 2px 0;
}

.filter-option span {
    font-size: 0.9rem;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    user-select: none;
}

.filter-actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}