/* ============================================
   SIDEBAR.CSS - Árbol de navegación (Sidebar)
   Inspirado en el navegador de repositorios de GitHub
   ============================================ */

/* ==============================
   CONTENEDOR SIDEBAR
============================== */
.page-sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: 280px;
    height: 100vh;
    background: #ffffff;
    border-right: 1px solid #e5e7eb;
    overflow-y: auto;
    overflow-x: hidden;
    z-index: 1000;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 0.875rem;
    box-shadow: 2px 0 8px rgba(0, 0, 0, 0.05);
}

/* Scrollbar personalizada */
.page-sidebar::-webkit-scrollbar {
    width: 8px;
}

.page-sidebar::-webkit-scrollbar-track {
    background: transparent;
}

.page-sidebar::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

.page-sidebar::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* ==============================
   HEADER DEL SIDEBAR
============================== */
.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid #e5e7eb;
    background: #f9fafb;
    position: sticky;
    top: 0;
    z-index: 10;
}

.sidebar-title {
    font-size: 1rem;
    font-weight: 700;
    color: #1f2937;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sidebar-title__icon {
    font-size: 1.25rem;
    display: none;
}

/* ==============================
   ÁRBOL DE NAVEGACIÓN
============================== */
.nav-tree {
    list-style: none;
    margin: 0;
    padding: 0.5rem 0;
}

.nav-item {
    list-style: none;
    margin: 0;
    padding: 0;
}

/* Elemento de árbol (parent) */
.tree-item {
    display: flex;
    align-items: center;
    padding: 0.5rem 1rem;
    color: #374151;
    text-decoration: none;
    transition: all 0.2s ease;
    cursor: pointer;
    user-select: none;
    line-height: 1.5;
    position: relative;
    border-left: 2px solid transparent;
    margin-left: -2px;
}

.tree-item:hover {
    background: #f3f4f6;
    color: #1f2937;
    border-left-color: #9333ea;
}
}

.tree-item.active {
    background: #eff6ff;
    color: #2563eb;
    font-weight: 600;
    border-left: 3px solid #2563eb;
    padding-left: calc(1rem - 3px);
}

.tree-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    background: #2563eb;
    width: 3px;
    border-radius: 0 2px 2px 0;
}

/* Icono de expand/collapse */
.tree-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.5rem;
    height: 1.5rem;
    margin-right: 0.25rem;
    flex-shrink: 0;
    transition: transform 0.2s ease;
    font-size: 0.75rem;
    cursor: pointer;
    color: #6b7280;
}

.tree-item[data-expandable="false"] .tree-toggle {
    visibility: hidden;
}

.tree-item[data-collapsed="true"] .tree-toggle {
    transform: rotate(-90deg);
}

/* Icono de tipo */
.tree-icon {
    display: none;
    align-items: center;
    justify-content: center;
    width: 1.2rem;
    height: 1.2rem;
    margin-right: 0.5rem;
    flex-shrink: 0;
    font-size: 1rem;
}

/* Label/nombre */
.tree-label {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ==============================
   NODOS HIJOS (Nested)
============================== */
.tree-children {
    list-style: none;
    margin: 0;
    padding: 0;
    max-height: 1000px;
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.3s ease;
    opacity: 1;
}

.tree-item[data-collapsed="true"] .tree-children {
    max-height: 0;
    opacity: 0;
}

/* Niveles de indentación */
.tree-item--level-1 {
    padding-left: 1rem;
}

.tree-item--level-2 {
    padding-left: 2.5rem;
    font-size: 0.8125rem;
}

.tree-item--level-3 {
    padding-left: 3.5rem;
    font-size: 0.75rem;
}

.tree-children > .nav-item:not(:last-child) > .tree-item--level-2::before {
    content: '';
    position: absolute;
    left: 1.25rem;
    top: 100%;
    height: 1000px;
    width: 1px;
    background: #e5e7eb;
    opacity: 0.5;
}

/* ==============================
   SECCIONES DE CATEGORÍA
============================== */
.sidebar-section {
    border-top: 1px solid #e5e7eb;
    margin-top: 0.5rem;
    padding-top: 0.5rem;
}

.sidebar-section:first-child {
    border-top: none;
    margin-top: 0;
    padding-top: 0;
}

.sidebar-section-title {
    padding: 0.75rem 1rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #9ca3af;
    user-select: none;
}

/* ==============================
   BOTONES DE ACCIÓN
============================== */
.sidebar-actions {
    padding: 1rem;
    border-top: 1px solid #e5e7eb;
    display: flex;
    gap: 0.5rem;
    position: sticky;
    bottom: 0;
    background: #f9fafb;
    z-index: 10;
}

.sidebar-action-btn {
    flex: 1;
    padding: 0.5rem;
    border: 1px solid #d1d5db;
    background: white;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.75rem;
    font-weight: 600;
    color: #374151;
    transition: all 0.2s ease;
    text-align: center;
    text-decoration: none;
}

.sidebar-action-btn:hover {
    background: #f3f4f6;
    border-color: #9ca3af;
}

/* ==============================
   MAIN CONTENT (Ajuste de layout)
============================== */
body.sidebar-open {
    margin-left: 280px;
}

@media (max-width: 1024px) {
    body.sidebar-open {
        margin-left: 0;
    }

    .page-sidebar {
        width: 280px;
        position: fixed;
        left: -280px;
        transition: left 0.3s ease;
        z-index: 999;
    }

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

    /* Overlay */
    body.sidebar-open::before {
        content: '';
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 998;
    }
}

@media (max-width: 768px) {
    .page-sidebar {
        width: 250px;
        left: -250px;
    }

    body.sidebar-open {
        margin-left: 0;
    }

    .sidebar-header {
        padding: 1rem;
    }

    .tree-item {
        padding: 0.4rem 0.75rem;
        font-size: 0.8125rem;
    }

    .tree-item--level-1 {
        padding-left: 0.75rem;
    }

    .tree-item--level-2 {
        padding-left: 1.5rem;
    }

    .tree-item--level-3 {
        padding-left: 2.25rem;
    }
}

@media (max-width: 480px) {
    .page-sidebar {
        width: 100%;
        max-width: 250px;
    }

    .sidebar-title {
        font-size: 0.875rem;
    }

    .tree-label {
        font-size: 0.75rem;
    }
}

/* ==============================
   TOGGLE BUTTON (para móviles)
============================== */
.sidebar-toggle {
    display: none;
    position: fixed;
    left: 1rem;
    top: 1rem;
    z-index: 1001;
    background: white;
    border: 1px solid #d1d5db;
    border-radius: 4px;
    padding: 0.5rem;
    cursor: pointer;
    font-size: 1.25rem;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    transform: translateX(-60px);
    transition: all 0.3s ease;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.sidebar-toggle.visible {
    display: flex;
}

.sidebar-toggle:hover {
    background: #f3f4f6;
}

body.sidebar-open .sidebar-toggle {
    transform: translateX(280px);
}

@media (max-width: 1024px) {
    .sidebar-toggle.visible {
        display: flex;
    }

    body.sidebar-open .sidebar-toggle {
        transform: translateX(250px);
    }
}

/* ==============================
   ANIMACIONES
============================== */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.tree-children:not([data-collapsed="true"]) {
    animation: slideIn 0.2s ease;
}

/* ==============================
   TEMAS OSCURO (Opcional)
============================== */
@media (prefers-color-scheme: dark) {
    .page-sidebar {
        background: #1f2937;
        border-right-color: #374151;
    }

    .sidebar-header {
        background: #111827;
        border-bottom-color: #374151;
    }

    .sidebar-title {
        color: #f3f4f6;
    }

    .tree-item {
        color: #d1d5db;
    }

    .tree-item:hover {
        background: #374151;
        color: #f3f4f6;
    }

    .tree-item.active {
        background: #1e3a8a;
        color: #60a5fa;
        border-left-color: #60a5fa;
    }

    .sidebar-section-title {
        color: #6b7280;
    }

    .sidebar-action-btn {
        background: #374151;
        border-color: #4b5563;
        color: #d1d5db;
    }

    .sidebar-action-btn:hover {
        background: #4b5563;
    }
}