/* Base Variables & Reset */
:root {
    /* Dark Mode (Default) */
    --bg-primary: #0f172a;
    --bg-card: #1e293b;
    --bg-card-alt: #334155;
    --bg-glass: rgba(15, 23, 42, 0.8);

    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --border-subtle: #334155;

    --accent-purple: #8b5cf6;
}

body.light {
    /* Light Mode */
    --bg-primary: #f8fafc;
    --bg-card: #ffffff;
    --bg-card-alt: #f1f5f9;
    --bg-glass: rgba(255, 255, 255, 0.9);

    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #94a3b8;

    --border-subtle: #e2e8f0;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-subtle);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Glassmorphism */
.glass {
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

/* Toggle Switch */
.toggle-sw {
    width: 36px !important;
    height: 20px !important;
    border-radius: 10px !important;
    position: relative !important;
    cursor: pointer !important;
    background: #334155 !important;
    border: none !important;
    padding: 0 !important;
    display: inline-flex !important;
    align-items: center !important;
    transition: background 0.3s;
}

body.light .toggle-sw {
    background: #cbd5e1 !important;
}

.toggle-sw.on {
    background: #8b5cf6 !important;
}

.toggle-sw::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    background: white;
    border-radius: 50%;
    top: 2px;
    left: 2px;
    transition: 0.2s cubic-bezier(0.4, 0.0, 0.2, 1);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.toggle-sw.on::after {
    left: 18px;
}

/* Tooltip System */
.tooltip {
    position: fixed;
    padding: 16px 20px;
    border-radius: 16px;
    font-size: 13px;
    z-index: 2000;
    max-width: 580px;
    max-height: 700px;
    overflow-y: auto;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
    background: rgba(15, 23, 42, 0.98);
    color: white;
    border: 1px solid rgba(139, 92, 246, 0.4);
    backdrop-filter: blur(12px);
    pointer-events: auto;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.15s, visibility 0.15s;
}

body.light .tooltip {
    background: rgba(255, 255, 255, 0.98);
    color: #1e293b;
    border: 1px solid #e2e8f0;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

#pagePreviewTooltip.visible {
    opacity: 1;
    visibility: visible;
}

#pagePreviewTooltip.pinned {
    box-shadow: 0 12px 50px rgba(139, 92, 246, 0.5), 0 0 20px rgba(139, 92, 246, 0.3);
    border-color: rgba(139, 92, 246, 0.6);
}

/* Tooltip Content Styles */
.tooltip-title {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 4px;
    line-height: 1.4;
}

.tooltip-slug {
    font-family: monospace;
    font-size: 11px;
    color: #94a3b8;
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

body.light .tooltip-slug {
    color: #64748b;
    border-bottom-color: #e2e8f0;
}

.tooltip-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 16px;
}

.tooltip-tag {
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 500;
    color: white;
    display: flex;
    align-items: center;
    gap: 4px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.tooltip-meta {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}

.tooltip-meta-row {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 12px;
}

.tooltip-meta-icon {
    flex-shrink: 0;
    width: 20px;
    text-align: center;
}

.tooltip-meta-values {
    line-height: 1.5;
}

.tooltip-highlight {
    background: rgba(139, 92, 246, 0.1);
    border-radius: 8px;
    padding: 12px;
    border: 1px solid rgba(139, 92, 246, 0.2);
}

.tooltip-highlight-label {
    font-weight: 600;
    color: #a78bfa;
    margin-bottom: 8px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

body.light .tooltip-highlight-label {
    color: #7c3aed;
}

.tooltip-meta-item {
    margin-bottom: 4px;
    padding-left: 12px;
    position: relative;
}

/* Mobile Tooltip Backdrop */
#tooltipBackdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s;
    backdrop-filter: blur(4px);
}

#tooltipBackdrop.visible {
    opacity: 1;
    visibility: visible;
}

body.tooltip-open {
    overflow: hidden;
    position: fixed;
    width: 100%;
}

/* Mobile Full Screen Tooltip */
@media (max-width: 768px) {
    #pagePreviewTooltip {
        position: fixed !important;
        inset: 0 !important;
        width: 100vw !important;
        height: 100vh !important;
        max-width: 100vw !important;
        max-height: 100vh !important;
        border-radius: 0 !important;
        padding: 0 !important;
        z-index: 2000 !important;
        transform: translateY(100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        background: var(--bg-primary) !important;
        border: none !important;
    }

    #pagePreviewTooltip.visible {
        transform: translateY(0);
    }

    .tooltip-header-mobile {
        position: sticky;
        top: 0;
        z-index: 10;
        padding: 12px 16px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        border-bottom: 1px solid var(--border-subtle);
        background: var(--bg-primary);
    }

    .tooltip-close-btn {
        width: 32px;
        height: 32px;
        border-radius: 8px;
        background: var(--bg-card-alt);
        border: none;
        color: var(--text-primary);
        font-size: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
    }

    .tooltip-content-mobile {
        padding: 20px;
        overflow-y: auto;
        height: calc(100vh - 57px);
        -webkit-overflow-scrolling: touch;
        color: var(--text-primary);
    }
}

/* Hidden Badges */
.hidden-tags-badge,
.hidden-meta-badge {
    position: relative;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
}

.hidden-tags-badge:hover,
.hidden-meta-badge:hover {
    transform: scale(1.1);
    z-index: 10;
}

.hidden-tags-tooltip,
.hidden-meta-tooltip {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(15, 23, 42, 0.98);
    border: 1px solid rgba(139, 92, 246, 0.4);
    border-radius: 12px;
    padding: 8px;
    min-width: 200px;
    max-width: 300px;
    max-height: 300px;
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    z-index: 100;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    pointer-events: none;
}

body.light .hidden-tags-tooltip,
body.light .hidden-meta-tooltip {
    background: white;
    border: 1px solid #e2e8f0;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
}

.hidden-tags-badge:hover .hidden-tags-tooltip,
.hidden-meta-badge:hover .hidden-meta-tooltip {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    bottom: calc(100% + 8px);
}

.hidden-tag-item,
.hidden-meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.15s;
    font-size: 11px;
    color: white;
}

body.light .hidden-tag-item,
body.light .hidden-meta-item {
    color: #1e293b;
}

.hidden-tag-item:hover,
.hidden-meta-item:hover {
    background: rgba(139, 92, 246, 0.2);
    transform: translateX(2px);
}

/* Filter Chips */
.filter-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 12px;
    background: var(--bg-card-alt);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    user-select: none;
}

.filter-chip:hover:not(.disabled) {
    border-color: var(--accent-purple);
    color: var(--text-primary);
}

.filter-chip.active {
    background: var(--accent-purple);
    border-color: var(--accent-purple);
    color: white;
    box-shadow: 0 2px 8px rgba(139, 92, 246, 0.3);
}

.filter-chip.disabled {
    opacity: 0.4;
    cursor: not-allowed;
    background: transparent;
}

/* Mobile Control Panel */
@media (max-width: 768px) {
    .control-panel {
        position: fixed;
        left: 0;
        bottom: 0;
        right: 0;
        top: auto !important;
        width: 100% !important;
        max-height: 80vh;
        border-radius: 24px 24px 0 0 !important;
        overflow-y: hidden;
        z-index: 60;
        transform: translateY(100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .control-panel.visible {
        transform: translateY(0);
    }

    .mobile-handle {
        display: flex;
        justify-content: center;
        padding: 12px;
        cursor: pointer;
        background: var(--bg-card);
        border-bottom: 1px solid var(--border-subtle);
    }

    .mobile-handle::before {
        content: '';
        width: 40px;
        height: 4px;
        background: var(--text-muted);
        border-radius: 2px;
        opacity: 0.5;
    }

    #graphTooltip {
        display: none !important;
    }
}

@media (min-width: 769px) {
    .mobile-handle {
        display: none;
    }
}

/* Graph Nodes */
.graph-node {
    cursor: pointer;
    transition: filter 0.2s;
}

.graph-node:hover {
    filter: brightness(1.2);
}

.node-label {
    font-family: 'Inter', sans-serif;
    fill: var(--text-secondary);
    pointer-events: none;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.8);
}

body.light .node-label {
    fill: var(--text-primary);
    text-shadow: 0 1px 2px rgba(255, 255, 255, 0.8);
}