/*
 * O'Keefe Family Tree Visualization
 * Stylesheet featuring responsive desktop/mobile layouts, bottom-sheet cards, and touch gestures
 */

:root {
    /* Layout & Typography */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --sidebar-width: 25%;
    --sidebar-min-width: 290px;
    --sidebar-max-width: 400px;
    --border-radius-sm: 6px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;

    /* Color Palette - Light/Default Theme */
    --bg-color: #f1f5f9;
    --canvas-bg: #f8fafc;
    --sidebar-bg: #ffffff;
    --sidebar-border: #e2e8f0;
    --canvas-grid-dot: #cbd5e1;

    /* Text Colors */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --text-inverse: #ffffff;

    /* Node Styles by Gender */
    --node-bg-m: #eff6ff;          /* Male Blue Tint */
    --node-border-m: #3b82f6;
    --node-text-m: #1e40af;
    --node-header-bg-m: #dbeafe;

    --node-bg-f: #fdf2f8;          /* Female Rose Tint */
    --node-border-f: #ec4899;
    --node-text-f: #9d174d;
    --node-header-bg-f: #fce7f3;

    --node-bg-default: #f8fafc;
    --node-border-default: #64748b;
    --node-text-default: #334155;
    
    --node-shadow: rgba(15, 23, 42, 0.08);
    --node-shadow-hover: rgba(15, 23, 42, 0.16);

    /* Edges and Selection Highlighting */
    --edge-color: #94a3b8;
    --edge-width: 2px;
    --ancestor-edge-color: #ea580c;    /* Orange for Direct Ancestors */
    --ancestor-edge-width: 3.5px;
    --descendant-edge-color: #059669;  /* Emerald for Direct Descendants */
    --descendant-edge-width: 3.5px;
    --selected-node-border: #7c3aed;   /* Purple ring for active selection */

    /* Dimmed / Saturation-reduced state for non-ancestry elements */
    --dimmed-opacity: 0.25;
    --dimmed-filter: grayscale(80%);

    /* Form & Interactive Controls */
    --input-bg: #ffffff;
    --input-border: #cbd5e1;
    --input-focus-border: #3b82f6;
    --input-focus-shadow: rgba(59, 130, 246, 0.15);
    --dropdown-bg: #ffffff;
    --dropdown-hover: #f1f5f9;
    --link-color: #2563eb;
}

/* Programmatic Dark Theme Override Support */
body.theme-dark {
    --bg-color: #0f172a;
    --canvas-bg: #090d16;
    --sidebar-bg: #1e293b;
    --sidebar-border: #334155;
    --canvas-grid-dot: #334155;

    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;

    --node-bg-m: #1e293b;
    --node-border-m: #3b82f6;
    --node-text-m: #93c5fd;

    --node-bg-f: #1f1d2b;
    --node-border-f: #ec4899;
    --node-text-f: #f472b6;

    --edge-color: #475569;
    --input-bg: #0f172a;
    --input-border: #475569;
    --dropdown-bg: #1e293b;
    --dropdown-hover: #334155;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: var(--font-family);
    color: var(--text-primary);
    background: var(--bg-color);
    -webkit-font-smoothing: antialiased;
    -webkit-touch-callout: none;
    user-select: none;
}

/* App Split Layout (Desktop default) */
.app-container {
    display: flex;
    flex-direction: row;
    width: 100vw;
    height: 100vh;
}

/* Left Section (Sidebar on Desktop) */
.sidebar {
    width: var(--sidebar-width);
    min-width: var(--sidebar-min-width);
    max-width: var(--sidebar-max-width);
    height: 100%;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--sidebar-border);
    display: flex;
    flex-direction: column;
    z-index: 20;
    box-shadow: 4px 0 16px rgba(0, 0, 0, 0.04);
    overflow-y: auto;
}

.sidebar-header {
    padding: 24px 20px 0 20px;
    display: flex;
    flex-direction: column;
}

.logo-container {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    flex-shrink: 0;
}

.logo-container img {
    max-width: 100%;
    max-height: 80px;
    height: auto;
    object-fit: contain;
}

.search-container {
    position: relative;
    margin-bottom: 20px;
    flex-shrink: 0;
}

#search-input {
    width: 100%;
    padding: 10px 14px;
    font-size: 14px;
    font-family: inherit;
    border: 1px solid var(--input-border);
    border-radius: var(--border-radius-md);
    background: var(--input-bg);
    color: var(--text-primary);
    outline: none;
    transition: all 0.2s ease;
}

#search-input:focus {
    border-color: var(--input-focus-border);
    box-shadow: 0 0 0 3px var(--input-focus-shadow);
}

#search-input::placeholder {
    color: var(--text-muted);
}

.autocomplete-dropdown {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    right: 0;
    background: var(--dropdown-bg);
    border: 1px solid var(--sidebar-border);
    border-radius: var(--border-radius-md);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.12);
    max-height: 260px;
    overflow-y: auto;
    z-index: 1000;
    display: none;
    list-style: none;
    margin: 0;
    padding: 4px 0;
}

.autocomplete-item {
    padding: 10px 14px;
    font-size: 14px;
    cursor: pointer;
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.autocomplete-item .item-sub {
    font-size: 11px;
    color: var(--text-muted);
}

.autocomplete-item:hover,
.autocomplete-item.active {
    background: var(--dropdown-hover);
}

/* Dynamic Metadata Panel & Pull-Up Card Container */
.metadata-panel {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    padding: 20px;
    border-top: 1px solid var(--sidebar-border);
    overflow-y: auto;
}

/* Sheet Handle (Hidden on Desktop) */
.sheet-handle {
    display: none;
}

.metadata-content {
    display: flex;
    flex-direction: column;
    gap: 16px;
    flex-grow: 1;
}

.meta-header {
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin: 0;
}

.meta-placeholder {
    color: var(--text-muted);
    font-size: 14px;
    text-align: center;
    margin: auto 0;
    padding: 24px 12px;
    line-height: 1.5;
    background: var(--canvas-bg);
    border-radius: var(--border-radius-md);
    border: 1px dashed var(--sidebar-border);
}

.meta-card {
    display: flex;
    flex-direction: column;
    gap: 16px;
    animation: fadeIn 0.25s ease-out;
    user-select: text;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

.meta-title-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--sidebar-border);
}

.meta-name {
    font-size: 20px;
    font-weight: 700;
    margin: 0;
    color: var(--text-primary);
    line-height: 1.2;
}

.meta-badge {
    font-size: 11px;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 999px;
    flex-shrink: 0;
}

.meta-badge.M {
    background: var(--node-header-bg-m);
    color: var(--node-text-m);
    border: 1px solid var(--node-border-m);
}

.meta-badge.F {
    background: var(--node-header-bg-f);
    color: var(--node-text-f);
    border: 1px solid var(--node-border-f);
}

.meta-rows {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.meta-row {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.meta-label {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

.meta-value {
    font-size: 14px;
    color: var(--text-primary);
    line-height: 1.45;
}

.meta-link {
    color: var(--link-color);
    cursor: pointer;
    text-decoration: underline;
    text-underline-offset: 3px;
    font-weight: 500;
    display: inline-block;
}

.meta-link:hover {
    opacity: 0.8;
}

/* Right Section - Infinite Canvas & Tree Graph */
.canvas-area {
    flex: 1;
    height: 100%;
    position: relative;
    background-color: var(--canvas-bg);
    background-image: radial-gradient(var(--canvas-grid-dot) 1px, transparent 1px);
    background-size: 32px 32px;
    overflow: hidden;
    cursor: grab;
    touch-action: none; /* Essential for mobile pinch/drag gesture control */
    -webkit-user-select: none;
    user-select: none;
}

.canvas-area.grabbing {
    cursor: grabbing;
}

.graph-svg {
    width: 100%;
    height: 100%;
    display: block;
    touch-action: none;
}

/* SVG Elements & Node Visuals */
.edge {
    fill: none;
    stroke: var(--edge-color);
    stroke-width: var(--edge-width);
    stroke-linecap: round;
    stroke-linejoin: round;
    transition: stroke 0.25s ease, stroke-width 0.25s ease, opacity 0.25s ease, filter 0.25s ease;
}

.edge.ancestor-edge {
    stroke: var(--ancestor-edge-color);
    stroke-width: var(--ancestor-edge-width);
}

.edge.descendant-edge {
    stroke: var(--descendant-edge-color);
    stroke-width: var(--descendant-edge-width);
}

.node {
    cursor: pointer;
    transition: opacity 0.25s ease, filter 0.25s ease;
    -webkit-tap-highlight-color: transparent;
}

.node-box {
    stroke-width: 2px;
    rx: var(--border-radius-md);
    filter: drop-shadow(0 4px 8px var(--node-shadow));
    transition: all 0.2s ease;
}

.node.M .node-box {
    fill: var(--node-bg-m);
    stroke: var(--node-border-m);
}

.node.F .node-box {
    fill: var(--node-bg-f);
    stroke: var(--node-border-f);
}

.node:hover .node-box {
    stroke-width: 3px;
    filter: drop-shadow(0 8px 16px var(--node-shadow-hover));
    transform: translateY(-1px);
}

.node.selected .node-box {
    stroke: var(--selected-node-border);
    stroke-width: 3.5px;
    filter: drop-shadow(0 0 14px rgba(124, 58, 237, 0.35));
}

.node-text-name {
    font-weight: 700;
    font-size: 14px;
    font-family: var(--font-family);
    pointer-events: none;
    text-anchor: middle;
}

.node.M .node-text-name { fill: var(--node-text-m); }
.node.F .node-text-name { fill: var(--node-text-f); }

.node-text-dates {
    font-size: 12px;
    font-weight: 600;
    fill: var(--text-secondary);
    font-family: var(--font-family);
    pointer-events: none;
    text-anchor: middle;
    transition: opacity 0.15s ease;
}

.node-text-meta {
    font-size: 11px;
    font-style: italic;
    fill: var(--text-muted);
    font-family: var(--font-family);
    pointer-events: none;
    text-anchor: middle;
    transition: opacity 0.15s ease;
}

/* Greying-out / Saturation reduction */
.has-selection .node.dimmed,
.has-selection .edge.dimmed {
    opacity: var(--dimmed-opacity);
    filter: var(--dimmed-filter);
}

/* Zoom-based Dynamic Content Visibility */
.zoom-low .node-text-dates,
.zoom-low .node-text-meta {
    opacity: 0;
    visibility: hidden;
}

.zoom-med .node-text-meta {
    opacity: 0;
    visibility: hidden;
}

/* Canvas UI Controls */
.zoom-controls {
    position: absolute;
    bottom: 24px;
    right: 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    z-index: 10;
}

.zoom-btn {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--sidebar-bg);
    border: 1px solid var(--sidebar-border);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 18px;
    font-weight: 700;
    transition: all 0.15s ease;
    outline: none;
    -webkit-tap-highlight-color: transparent;
}

.zoom-btn:hover, .zoom-btn:active {
    background: var(--canvas-bg);
    transform: scale(1.05);
}

/* Legend in top right corner */
.legend {
    position: absolute;
    top: 24px;
    right: 24px;
    background: var(--sidebar-bg);
    border: 1px solid var(--sidebar-border);
    border-radius: var(--border-radius-md);
    padding: 12px 16px;
    font-size: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
    display: flex;
    flex-direction: column;
    gap: 8px;
    z-index: 10;
    opacity: 0.9;
}

.legend-title {
    font-weight: 700;
    color: var(--text-primary);
    text-transform: uppercase;
    font-size: 11px;
    letter-spacing: 0.5px;
    margin-bottom: 2px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
}

.legend-box {
    width: 14px;
    height: 14px;
    border-radius: 4px;
    flex-shrink: 0;
}

.legend-box.m { background: var(--node-bg-m); border: 2px solid var(--node-border-m); }
.legend-box.f { background: var(--node-bg-f); border: 2px solid var(--node-border-f); }
.legend-line { width: 16px; height: 3px; border-radius: 2px; flex-shrink: 0; }
.legend-line.anc { background: var(--ancestor-edge-color); }
.legend-line.desc { background: var(--descendant-edge-color); }

/* ==========================================================================
   Mobile & Tablet Responsive Layout (Google-Maps Style UI)
   ========================================================================== */
@media (max-width: 768px) {
    .app-container {
        position: relative;
        width: 100vw;
        height: 100vh;
        overflow: hidden;
    }

    /* Infinite canvas fills 100% of the screen */
    .canvas-area {
        position: absolute;
        inset: 0;
        width: 100%;
        height: 100%;
        z-index: 1;
    }

    /* Hide the legend on mobile as requested */
    .legend {
        display: none !important;
    }

    /* Sidebar transforms into floating top overlay + bottom sheet card */
    .sidebar {
        position: absolute;
        inset: 0;
        width: 100%;
        max-width: none;
        height: 100%;
        background: transparent;
        border-right: none;
        box-shadow: none;
        pointer-events: none;
        z-index: 20;
        overflow: hidden;
    }

    /* Top Floating Search Pill + Logo */
    .sidebar-header {
        pointer-events: auto;
        background: var(--sidebar-bg);
        margin: 12px 12px 0 12px;
        padding: 8px 14px;
        border-radius: var(--border-radius-lg);
        box-shadow: 0 4px 18px rgba(0, 0, 0, 0.14);
        border: 1px solid var(--sidebar-border);
        display: flex;
        flex-direction: row;
        align-items: center;
        gap: 12px;
    }

    .logo-container {
        margin-bottom: 0;
        flex-shrink: 0;
    }

    .logo-container img {
        max-height: 36px;
        width: auto;
    }

    .search-container {
        margin-bottom: 0;
        flex-grow: 1;
    }

    #search-input {
        padding: 8px 10px;
        font-size: 15px; /* Preventing iOS zoom-on-focus */
        border: none;
        background: transparent;
    }

    #search-input:focus {
        box-shadow: none;
        border: none;
    }

    /* Google-Maps Style Pull-Up Bottom Sheet Card */
    .metadata-panel {
        pointer-events: auto;
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        width: 100%;
        max-height: 75vh;
        background: var(--sidebar-bg);
        border-top: 1px solid var(--sidebar-border);
        border-top-left-radius: 20px;
        border-top-right-radius: 20px;
        box-shadow: 0 -6px 28px rgba(0, 0, 0, 0.16);
        padding: 0 20px 24px 20px;
        overflow-y: auto;
        overscroll-behavior: contain;
        transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
        transform: translateY(100%); /* Completely out of view when no node is selected */
        z-index: 30;
    }

    /* Bottom Sheet Active States */
    .metadata-panel.sheet-open {
        transform: translateY(0);
    }

    .metadata-panel.sheet-peek {
        transform: translateY(calc(100% - 48px));
    }

    /* Visible Pull Handle Bar */
    .sheet-handle {
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 12px 0 14px 0;
        cursor: pointer;
        user-select: none;
        touch-action: pan-y;
        position: sticky;
        top: 0;
        background: var(--sidebar-bg);
        z-index: 10;
        margin-left: -20px;
        margin-right: -20px;
    }

    .handle-bar {
        width: 44px;
        height: 5px;
        background-color: var(--canvas-grid-dot);
        border-radius: 999px;
        transition: background-color 0.2s ease;
    }

    .sheet-handle:active .handle-bar,
    .sheet-handle:hover .handle-bar {
        background-color: var(--text-muted);
    }

    /* Position Zoom Controls dynamically above bottom card */
    .zoom-controls {
        bottom: 24px;
        right: 16px;
        transition: bottom 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    }

    body.sheet-active .zoom-controls {
        bottom: calc(75vh + 16px);
    }

    body.sheet-peek-active .zoom-controls {
        bottom: 64px;
    }
}