/* ============================================
   INL-NAV TREE MENU COMPONENT (Blazor Ready)
   Filename: inl-nav-tree.css
   All classes prefixed with 'inl-nav-' for style isolation
   Version: 1.0.0
   ============================================ */

/* CSS Reset & Base - scoped to component container */
.inl-nav-tree-container {
    --inl-nav-primary: #1e3a5f;
    --inl-nav-primary-light: #2c5282;
    --inl-nav-accent: #e67e22;
    --inl-nav-leaf: #2c7a4d;
    --inl-nav-bg: #f8fafc;
    --inl-nav-panel-bg: #ffffff;
    --inl-nav-hover: #f1f5f9;
    --inl-nav-border: #e2e8f0;
    --inl-nav-shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --inl-nav-shadow-md: 0 10px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.02);
    --inl-nav-transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --inl-nav-radius-md: 20px;
    --inl-nav-radius-sm: 12px;
    --inl-nav-radius-lg: 40px;
}

/* Main container for the tree component */
.inl-nav-tree-container {
    font-family: 'Segoe UI', 'Inter', system-ui, -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
    background: var(--inl-nav-bg);
    border-radius: var(--inl-nav-radius-md);
    box-shadow: var(--inl-nav-shadow-md);
    padding: 1.5rem 0.75rem 1.5rem 1rem;
    max-width: 360px;
    margin: 0;
    position: relative;
    backdrop-filter: blur(0px);
    transition: var(--inl-nav-transition);
    border: 1px solid rgba(226, 232, 240, 0.6);
}

/* Tree header styling - Blazor component title */
.inl-nav-tree-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0 0.75rem 1rem 0.75rem;
    margin-bottom: 0.5rem;
    border-bottom: 2px solid var(--inl-nav-border);
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--inl-nav-primary);
    letter-spacing: -0.2px;
}

.inl-nav-tree-header-icon {
    font-size: 1.4rem;
}

.inl-nav-tree-header-title {
    flex: 1;
}

/* Base tree menu - root ul */
.inl-nav-tree-menu,
.inl-nav-tree-menu ul {
    list-style: none;
    margin: 0;
    padding-left: 0;
    position: relative;
}

.inl-nav-tree-menu {
    padding-left: 0.5rem;
    max-height: 65vh;
    overflow-y: auto;
    scrollbar-width: thin;
    padding-right: 0.25rem;
}

    .inl-nav-tree-menu::-webkit-scrollbar {
        width: 5px;
    }

    .inl-nav-tree-menu::-webkit-scrollbar-track {
        background: #e2e8f0;
        border-radius: 10px;
    }

    .inl-nav-tree-menu::-webkit-scrollbar-thumb {
        background: #94a3b8;
        border-radius: 10px;
    }

/* Tree item */
.inl-nav-tree-item {
    position: relative;
    margin: 6px 0;
    line-height: 1.45;
    transition: var(--inl-nav-transition);
    animation: inlNavFadeSlide 0.2s ease backwards;
}

/* Connecting lines for tree structure */
.inl-nav-tree-menu ul::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 12px;
    left: -10px;
    width: 2px;
    background: linear-gradient(to bottom, #cbd5e1, #94a3b8);
    border-radius: 2px;
    opacity: 0.5;
}

.inl-nav-tree-item::before {
    content: '';
    position: absolute;
    width: 18px;
    height: 2px;
    background: #cbd5e1;
    top: 1.15em;
    left: -22px;
    border-radius: 2px;
}

.inl-nav-tree-item:last-child::after {
    content: '';
    position: absolute;
    top: 1.15em;
    left: -22px;
    width: 18px;
    height: calc(100% - 1.15em);
    background: var(--inl-nav-bg);
    z-index: 1;
}

/* Root level adjustments */
.inl-nav-tree-menu > .inl-nav-tree-item {
    margin-left: 0.75rem;
}

    .inl-nav-tree-menu > .inl-nav-tree-item::before {
        left: -28px;
    }

    .inl-nav-tree-menu > .inl-nav-tree-item:last-child::after {
        left: -28px;
    }

/* Nested ul spacing */
.inl-nav-tree-menu ul {
    padding-left: 1.75rem;
    position: relative;
}

/* Node element (clickable area) */
.inl-nav-tree-node {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--inl-nav-panel-bg);
    padding: 0.6rem 1rem 0.6rem 2rem;
    border-radius: var(--inl-nav-radius-lg);
    font-weight: 500;
    color: #1e293b;
    cursor: pointer;
    transition: var(--inl-nav-transition);
    box-shadow: var(--inl-nav-shadow-sm);
    border: 1px solid var(--inl-nav-border);
    position: relative;
    z-index: 2;
}

    .inl-nav-tree-node:hover {
        background: var(--inl-nav-hover);
        border-color: #cbd5e1;
        transform: translateX(3px);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
    }

    /* Active state for selected item */
    .inl-nav-tree-node.inl-nav-active {
        background: linear-gradient(98deg, #eef2ff 0%, #ffffff 100%);
        border-left: 3px solid var(--inl-nav-accent);
        font-weight: 600;
        color: var(--inl-nav-primary);
    }

/* Leaf node specific */
.inl-nav-tree-item:not(.inl-nav-has-children) > .inl-nav-tree-node {
    background: #ffffff;
    font-weight: 450;
}

    .inl-nav-tree-item:not(.inl-nav-has-children) > .inl-nav-tree-node:hover {
        background: #fef9e6;
        border-left: 3px solid var(--inl-nav-leaf);
    }

/* Toggle button (chevron style) */
.inl-nav-tree-toggle {
    background: #f1f5f9;
    border: none;
    font-size: 1.1rem;
    cursor: pointer;
    width: 26px;
    height: 26px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 40px;
    transition: all 0.2s ease;
    color: #475569;
    margin-left: 0.75rem;
    flex-shrink: 0;
    font-weight: bold;
}

    .inl-nav-tree-toggle:hover {
        background: #e2e8f0;
        transform: scale(1.05);
        color: var(--inl-nav-accent);
    }

/* Nested ul visibility management */
.inl-nav-tree-children {
    overflow: hidden;
    transition: max-height 0.35s ease-out, opacity 0.25s ease;
    max-height: 800px;
    opacity: 1;
}

    .inl-nav-tree-children.inl-nav-collapsed {
        max-height: 0 !important;
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.2s, visibility 0s linear 0.2s;
    }

/* Icons styling */
.inl-nav-node-icon {
    margin-right: 10px;
    font-size: 1.1rem;
    width: 1.4rem;
    text-align: center;
    display: inline-block;
}

.inl-nav-has-children > .inl-nav-tree-node .inl-nav-node-icon {
    color: var(--inl-nav-primary);
}

.inl-nav-tree-item:not(.inl-nav-has-children) > .inl-nav-tree-node .inl-nav-node-icon {
    color: var(--inl-nav-leaf);
}

/* Text wrapper */
.inl-nav-node-text {
    display: flex;
    align-items: center;
    gap: 6px;
    flex: 1;
}

/* Animation */
@keyframes inlNavFadeSlide {
    0% {
        opacity: 0;
        transform: translateY(-4px);
    }

    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Decorative tree element */
.inl-nav-tree-container::before {
    content: "🌳";
    position: absolute;
    font-size: 5rem;
    opacity: 0.03;
    bottom: 8px;
    right: 12px;
    pointer-events: none;
    font-family: monospace;
}

/* Responsive adjustments */
@media (max-width: 480px) {
    .inl-nav-tree-container {
        max-width: 300px;
        padding: 1rem 0.3rem 1rem 0.5rem;
    }

    .inl-nav-tree-node {
        padding: 0.5rem 0.8rem 0.5rem 1.6rem;
        font-size: 0.9rem;
    }

    .inl-nav-tree-menu ul {
        padding-left: 1rem;
    }

    .inl-nav-tree-header {
        font-size: 0.95rem;
        padding: 0 0.5rem 0.75rem 0.5rem;
    }
}

/* Focus styles for accessibility */
.inl-nav-tree-node:focus-visible,
.inl-nav-tree-toggle:focus-visible {
    outline: 2px solid var(--inl-nav-accent);
    outline-offset: 2px;
    border-radius: 40px;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    .inl-nav-tree-container {
        --inl-nav-bg: #1e293b;
        --inl-nav-panel-bg: #334155;
        --inl-nav-hover: #475569;
        --inl-nav-border: #475569;
    }

    .inl-nav-tree-container {
        background: var(--inl-nav-bg);
        border-color: #334155;
    }

    .inl-nav-tree-node {
        color: #e2e8f0;
    }

        .inl-nav-tree-node:hover {
            background: var(--inl-nav-hover);
        }

    .inl-nav-tree-toggle {
        background: #475569;
        color: #cbd5e1;
    }

        .inl-nav-tree-toggle:hover {
            background: #64748b;
            color: var(--inl-nav-accent);
        }

    .inl-nav-tree-item:not(.inl-nav-has-children) > .inl-nav-tree-node {
        background: #334155;
        color: #e2e8f0;
    }

    .inl-nav-tree-menu::-webkit-scrollbar-track {
        background: #334155;
    }
}

/* Print styles */
@media print {
    .inl-nav-tree-container {
        box-shadow: none;
        border: 1px solid #ccc;
        max-width: 100%;
    }

    .inl-nav-tree-toggle {
        display: none;
    }

    .inl-nav-tree-children {
        max-height: none !important;
        opacity: 1 !important;
        visibility: visible !important;
    }
}