:root {
    /* --- THEME VARIABLES --- */
    --bg-body: #0f172a; --bg-panel: #1e293b; --bg-input: #334155; --bg-hover: #475569;
    --text-main: #f8fafc; --text-muted: #94a3b8; --border-color: #334155;
    --primary: #3b82f6; --primary-text: #ffffff; --danger: #ef4444; --success: #22c55e;
    --warning: #f59e0b; 
    --radius: 12px; --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --resizer-bg: #475569;
    --add-mode-gap: 8px; /* unified spacing for create-line (add) mode (reduced) */
}
^
body.light-mode {
    --bg-body: #f8fafc; --bg-panel: #ffffff; --bg-input: #f1f5f9; --bg-hover: #e2e8f0;
    --text-main: #0f172a; --text-muted: #64748b; --border-color: #e2e8f0;
    --primary: #2563eb; --resizer-bg: #cbd5e1;
}

* { box-sizing: border-box; }

body {
    font-family: 'Inter', -apple-system, sans-serif;
    background-color: var(--bg-body); color: var(--text-main);
    margin: 0; display: flex; height: 100vh; overflow: hidden;
    transition: background-color 0.4s ease;
}

input::placeholder {
  color: white;
}

textarea::placeholder {
  color: white;
}

/* --- LAYOUT --- */
.main-container { display: flex; width: 100%; max-width: 100%; margin: 0; padding: 15px; height: 100vh; align-items: stretch; }

.board-area {
    flex: 0 0 55%; min-width: 300px; display: flex; justify-content: center; align-items: center; flex-direction: column;
    padding: 10px; position: relative; z-index: 1; overflow: visible !important; 
}

/* Container für Balken + Brett */
.board-wrapper {
    display: flex; gap: 10px; width: 100%; position: relative; z-index: 10;
    max-width: 85vh; max-height: 85vh; align-items: stretch; justify-content: center;
    position: relative; /* Wichtig für SVG Overlay und Eval Bar */
    aspect-ratio: 1 / 1; /* Match board's aspect ratio */
}

#board {
    width: 100%; aspect-ratio: 1/1; 
    box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1);
    flex-shrink: 1;
    z-index: 1; /* Unter dem SVG */
    position: relative; /* For eval bar positioning */
}

/* Board uses default corners */

/* Visual feedback when shapes are cleared via keyboard */
#board.flash-clear-shapes {
    box-shadow: 0 0 0 6px rgba(245, 159, 11, 0.12), 0 20px 30px rgba(0,0,0,0.35);
    transition: box-shadow 0.18s ease;
}

/* SVG OVERLAY FÜR PFEILE */
#arrow-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    pointer-events: none; /* Klicks gehen durch */
    z-index: 1000; /* Über den Figuren */
    shape-rendering: geometricPrecision; /* Smooth anti-aliased edges */
}

/* WICHTIG: Damit Bilder immer sichtbar sind */
#board img { 
    opacity: 1 !important;
    z-index: 100;
    visibility: visible !important;
}

#board img[src*="piece"] {
    opacity: 1 !important;
    visibility: visible !important;
}

/* DRAGGED PIECES ALWAYS ON TOP */
#board img.dragging {
    opacity: 1 !important;
    z-index: 10000 !important;
    position: fixed !important;
    visibility: visible !important;
}

/* --- BRETT FARBTHEMEN --- */
.board-theme-green .white-1e1d7 { background-color: #eeeed2; color: #769656; }
.board-theme-green .black-3c85d { background-color: #769656; color: #eeeed2; }
.board-theme-brown .white-1e1d7 { background-color: #f0d9b5; color: #b58863; }
.board-theme-brown .black-3c85d { background-color: #b58863; color: #f0d9b5; }
.board-theme-blue .white-1e1d7 { background-color: #dee3e6; color: #8ca2ad; }
.board-theme-blue .black-3c85d { background-color: #8ca2ad; color: #dee3e6; }
.board-theme-gray .white-1e1d7 { background-color: #e0e0e0; color: #707070; }
.board-theme-gray .black-3c85d { background-color: #707070; color: #e0e0e0; }
.board-theme-purple .white-1e1d7 { background-color: #e9d5ff; color: #8b5cf6; }
.board-theme-purple .black-3c85d { background-color: #8b5cf6; color: #e9d5ff; }
.board-theme-teal .white-1e1d7 { background-color: #ccfbf1; color: #0d9488; }
.board-theme-teal .black-3c85d { background-color: #0d9488; color: #ccfbf1; }

/* ROUNDED BOARD CORNERS */
.board-rounded { border-radius: 8px; overflow: hidden; }
.board-rounded .square-55d63 { /* All squares default */ }
/* Target corner squares by position using nth-child */
.board-rounded [data-square="a8"] { border-top-left-radius: 8px; }
.board-rounded [data-square="h8"] { border-top-right-radius: 8px; }
.board-rounded [data-square="a1"] { border-bottom-left-radius: 8px; }
.board-rounded [data-square="h1"] { border-bottom-right-radius: 8px; }

/* STOCKFISH EVAL BAR */
#eval-bar-container {
    width: 30px; background: #333; 
    border-radius: 4px; overflow: hidden; position: absolute;
    left: -40px; top: 0;
    height: 100%;
    box-shadow: inset 0 0 5px rgba(0,0,0,0.5);
    transition: opacity 0.3s;
    display: flex; flex-direction: column; justify-content: flex-end;
    border: 1px solid var(--border-color);
}
#eval-fill {
    width: 100%; height: 50%; 
    background: #fff; 
    transition: height 0.5s ease-in-out;
}
#eval-score {
    position: absolute; 
    width: 100%; text-align: center; 
    font-size: 11px; font-weight: 800; 
    z-index: 2; pointer-events: none; line-height: 1; padding: 4px 0;
    font-family: monospace;
}

.highlight-square { box-shadow: inset 0 0 0 4px var(--highlight-last); }

/* Drag highlighting */
#board .drag-source { 
    box-shadow: inset 0 0 0 100px rgba(0, 0, 0, 0.15) !important; 
}
#board .drag-hover { 
    box-shadow: inset 0 0 0 100px rgba(0, 0, 0, 0.15) !important; 
}

/* Disable chessboard.js default hover highlighting during drag */
#board.is-dragging .highlight1-32417:not(.drag-source):not(.drag-hover),
#board.is-dragging .highlight2-9c5d2:not(.drag-source):not(.drag-hover) {
    box-shadow: none !important;
}

.resizer {
    width: 12px; cursor: col-resize; background-color: transparent; display: flex; justify-content: center; align-items: center;
    transition: background-color 0.2s; margin: 0 4px; border-radius: 6px; flex-shrink: 0; z-index: 10;
}
.resizer::after { content: ""; width: 4px; height: 40px; background-color: var(--resizer-bg); border-radius: 2px; transition: height 0.2s, background-color 0.2s; }
.resizer:hover, .resizer.dragging { background-color: var(--bg-hover); }
.resizer:hover::after, .resizer.dragging::after { height: 100%; background-color: var(--primary); }

.controls-area {
    flex: 1; min-width: 350px; background-color: var(--bg-panel); border-radius: var(--radius);
    box-shadow: var(--shadow); display: flex; flex-direction: column; height: 100%; overflow: hidden;
}
.header-row {
    display: flex; justify-content: space-between; align-items: center; padding: 20px 25px; border-bottom: 1px solid var(--border-color); flex-shrink: 0;
}
h2 { margin: 0; font-size: 1.1rem; font-weight: 700; display: flex; align-items: center; gap: 10px; color: var(--text-main); letter-spacing: -0.5px; }
h2 i { color: var(--primary); }
.settings-btn { background: none; border: none; color: var(--text-muted); font-size: 1.2rem; cursor: pointer; transition: 0.3s; }
.settings-btn:hover { color: var(--text-main); transform: rotate(90deg); }

#view-mode, #settings-mode, #add-mode, #selection-mode, #train-mode, #bot-setup-mode, #bot-play-mode, #import-pgn-mode { display: flex; flex-direction: column; height: 100%; overflow: hidden; padding: 25px; }
.scrollable-list, .settings-container, #selection-list { flex-grow: 1; overflow-y: auto; min-height: 0; padding-right: 8px; margin-bottom: 20px; }

.action-group { margin-top: auto; flex-shrink: 0; display: flex; gap: 12px; flex-wrap: wrap; }
.action-group { justify-content: center; }

/* TRAINING UI */
.training-dashboard { flex-grow: 1; display: flex; flex-direction: column; justify-content: center; padding-bottom: 20px; width: 100%; }
.training-card { background: var(--bg-input); border-radius: var(--radius); padding: 18px; width: 100%; text-align: center; box-shadow: var(--shadow); border: 1px solid var(--border-color); }
/* Center training card on larger screens */
#train-mode .training-dashboard { justify-content: center; align-items: center; }
#train-mode .training-card { max-width: 520px; margin: 0 auto; }
/* Ensure the training card fits inside the menu area and doesn't force page scrolling */
#train-mode { overflow: hidden; }
#train-mode .training-dashboard { justify-content: flex-start; align-items: stretch; overflow: auto; padding-bottom: 12px; }
#train-mode .training-card { max-height: calc(100% - 20px); overflow-y: auto; box-sizing: border-box; }
.category-label { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 1px; color: var(--text-muted); margin-bottom: 10px; font-weight: 600; }
.active-category-title { font-size: 1.4rem; font-weight: 700; color: var(--text-main); margin: 0 0 20px 0; }
.progress-container { width: 100%; height: 6px; background: var(--bg-panel); border-radius: 4px; overflow: hidden; margin-bottom: 18px; }
.progress-fill { height: 100%; background: var(--primary); width: 0%; transition: width 0.5s ease; }
.progress-text { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 5px; display: flex; justify-content: space-between; }

.status-badge { display: inline-block; padding: 10px 20px; border-radius: 30px; font-size: 1.15rem; font-weight: 800; background: var(--bg-panel); color: var(--text-main); border: 2px solid var(--border-color); transition: all 0.3s; }
.status-badge.success { background: rgba(34, 197, 94, 0.2); color: var(--success); border-color: var(--success); }
.status-badge.error { background: rgba(239, 68, 68, 0.2); color: var(--danger); border-color: var(--danger); animation: shake 0.4s; }
.status-badge.neutral { background: var(--bg-input); color: var(--primary); border-color: var(--primary); }
@keyframes shake { 10%, 90% { transform: translate3d(-2px, 0, 0); } 20%, 80% { transform: translate3d(4px, 0, 0); } 30%, 50%, 70% { transform: translate3d(-6px, 0, 0); } 40%, 60% { transform: translate3d(6px, 0, 0); } }

.training-note { 
    background: var(--bg-panel); border-left: 6px solid var(--primary); 
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.2); 
    padding: 20px; margin-top: 25px; border-radius: var(--radius);
    color: var(--text-main); width: 100%; max-width: 800px; 
    display: none; font-size: 1.1rem; line-height: 1.6; 
    flex-direction: column; gap: 15px; position: relative; z-index: 10;
}
.note-content { display: flex; align-items: flex-start; gap: 15px; }
.note-content i { color: var(--primary); margin-top: 4px; font-size: 1.3rem; }
#note-text { flex: 1; }
.continue-btn { align-self: flex-end; background: var(--primary); color: white; border: none; padding: 10px 20px; border-radius: var(--radius); font-weight: 600; cursor: pointer; font-size: 0.95rem; display: flex; align-items: center; gap: 8px; transition: 0.2s; }
.continue-btn:hover { background: #2563eb; transform: translateY(-1px); }

/* LISTS */
.category-group { margin-bottom: 8px; }
.category-header { font-size: 0.9rem; font-weight: 600; color: var(--text-main); margin-bottom: 2px; display: flex; align-items: center; justify-content: space-between; padding: 12px 10px; border-radius: var(--radius); cursor: pointer; transition: background 0.2s; }
.category-header:hover { background: var(--bg-hover); }
.category-header i.fa-chevron-right { color: var(--text-muted); font-size: 0.8rem; margin-right: 12px; transition: transform 0.2s; }
.category-header.expanded i.fa-chevron-right { transform: rotate(90deg); color: var(--text-main); }
.category-header.special-cat { border-left: 4px solid var(--warning); background: rgba(245, 158, 11, 0.1); }
.category-header.special-cat span { color: var(--warning); }
.category-content { display: none; padding-left: 12px; margin-top: 2px; }
.category-content.expanded { display: block; animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.line-item { background: transparent; padding: 12px; border-radius: var(--radius); cursor: pointer; display: flex; justify-content: space-between; align-items: flex-start; font-size: 0.95rem; transition: all 0.2s ease; margin-bottom: 2px; }
.line-item:hover { background: var(--bg-input); }
.line-item.in-repetition { background: rgba(245, 158, 11, 0.08); }

.line-item > span:first-child { 
    flex: 1 1 auto; min-width: 0; 
    white-space: normal; word-break: break-word; line-height: 1.5; 
    padding-right: 10px; 
}
.line-actions { flex: 0 0 auto; display: flex; gap: 5px; opacity: 0; transition: 0.2s; }

/* View mode move spans for context menu */
.view-move { 
    cursor: pointer; 
    padding: 1px 2px; 
    border-radius: 3px; 
    transition: background 0.15s; 
}
.view-move:hover { 
    background: var(--bg-hover); 
    color: var(--primary); 
}
.view-move-num { 
    color: var(--text-muted); 
    font-size: 0.85em;
    margin-right: 1px;
}
.line-moves { 
    display: inline; 
}

.line-item input[type="checkbox"] { accent-color: var(--primary); transform: scale(1.3); margin-right: 15px; cursor: pointer; margin-top: 3px; flex-shrink: 0; }

.cat-actions { opacity: 0; transition: opacity 0.2s ease; display: flex; gap: 5px; flex-shrink: 0; }
.category-header:hover .cat-actions, .line-item:hover .line-actions { opacity: 1; }
@media (hover: none) { .cat-actions, .line-actions { opacity: 1; } }
.cat-actions button, .line-actions button { background: transparent; border: none; color: var(--text-muted); cursor: pointer; padding: 6px; border-radius: 4px; font-size: 0.9rem; transition: 0.2s; }
.cat-actions button:hover, .line-actions button:hover { color: var(--primary); background: var(--bg-input); }
.cat-actions button.del:hover, .line-actions button.del:hover { color: var(--danger); }
.line-actions button.toggle-rep:hover { color: var(--warning); }
.line-actions button:has(i.fa-robot):hover { color: var(--success) !important; }

/* BUTTONS & INPUTS */
.action-btn { background-color: var(--text-main); color: var(--bg-body); border: none; padding: 14px 24px; border-radius: var(--radius); font-weight: 700; cursor: pointer; flex: 1; display: flex; align-items: center; justify-content: center; gap: 8px; transition: 0.2s; font-size: 1rem; }
.action-btn:hover { opacity: 0.9; transform: translateY(-1px); }
.action-btn.secondary { background-color: var(--bg-input); color: var(--text-main); }
.action-btn.secondary:hover { background-color: var(--bg-hover); }

.action-btn.repetition { background-color: transparent; border: 2px solid var(--warning); color: var(--warning); width: 100%; flex: 1 1 100%; order: -1; opacity: 0.8; }
.action-btn.repetition:hover, .action-btn.repetition:active { opacity: 1; background: var(--warning); color: #000; }

.action-btn.remove-repetition { background-color: transparent; border: 2px solid var(--success); color: var(--success); width: 100%; flex: 1 1 100%; order: -1; }
.action-btn.remove-repetition:hover { background: var(--success); color: #fff; }

input[type="text"], input[type="search"], textarea.note-input { width: 100%; padding: 14px; margin-bottom: 12px; background: var(--bg-input); border: 2px solid transparent; color: var(--text-main); border-radius: var(--radius); font-size: 1rem; transition: 0.2s; flex-shrink: 0; font-family: inherit; }
input:focus, textarea:focus { outline: none; background: var(--bg-panel); border-color: var(--primary); }
textarea.note-input { height: 100px; resize: none; margin-top: 5px; }

/* SLIDER STYLE */
input[type="range"] { appearance: none; -webkit-appearance: none; width: 100%; background: transparent; margin: 15px 0; }
input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; height: 24px; width: 24px; border-radius: 50%; background: var(--primary); cursor: pointer; margin-top: -8px; box-shadow: 0 2px 4px rgba(0,0,0,0.2); }
input[type="range"]::-webkit-slider-runnable-track { width: 100%; height: 8px; cursor: pointer; background: var(--bg-input); border-radius: 4px; }

.settings-section { margin-bottom: 30px; }
.settings-label { display: block; font-size: 0.8rem; font-weight: 600; margin-bottom: 12px; color: var(--text-muted); }
.options-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.options-grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.option-card { background: var(--bg-input); border: 2px solid transparent; padding: 15px; border-radius: var(--radius); cursor: pointer; text-align: center; font-size: 0.85rem; font-weight: 500; color: var(--text-main); transition: 0.2s; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; }
.option-card:hover { background: var(--bg-hover); } .option-card.selected { border-color: var(--primary); color: var(--primary); background: var(--bg-panel); }
.option-card i { font-size: 1rem; }

/* Editor Order List */
.order-list { display: flex; flex-direction: column; gap: 8px; }
.order-item { display: flex; align-items: center; gap: 12px; background: var(--bg-input); padding: 12px 15px; border-radius: var(--radius); }
.order-item i.fa-grip-lines { color: var(--text-muted); font-size: 0.9rem; }
.order-item span { flex: 1; font-size: 0.9rem; font-weight: 500; }
.order-arrows { display: flex; gap: 4px; }
.order-arrows button { background: var(--bg-panel); border: none; color: var(--text-muted); width: 28px; height: 28px; border-radius: 6px; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: 0.2s; }
.order-arrows button:hover { background: var(--bg-hover); color: var(--text-main); }
.order-arrows button:active { transform: scale(0.95); }

.toggle-row { display: flex; justify-content: space-between; align-items: center; padding: 12px 0; border-bottom: 1px solid var(--border-color); cursor: pointer; }
.toggle-switch { width: 44px; height: 24px; background: var(--bg-input); border-radius: 12px; position: relative; transition: 0.3s; }
.toggle-switch::after { content: ''; position: absolute; left: 2px; top: 2px; width: 20px; height: 20px; background: #fff; border-radius: 50%; transition: 0.3s; }
.toggle-row.active .toggle-switch { background: var(--primary); } .toggle-row.active .toggle-switch::after { left: 22px; }
.color-dot { width: 20px; height: 20px; border-radius: 50%; display: inline-block; }
.view-mode-header { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-bottom: var(--add-mode-gap); flex-shrink: 0; }
.view-mode-header .color-switch { margin-bottom: 0; flex: 1; }
.view-mode-header .analyze-btn { 
    padding: 10px 12px; 
    background: var(--bg-input);
    border: none;
    border-radius: 8px;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}
.view-mode-header .analyze-btn:hover,
.view-mode-header .analyze-btn.active {
    background: var(--primary);
    color: var(--primary-text);
}
.color-switch { display: flex; background: var(--bg-input); border-radius: var(--radius); padding: 4px; margin-bottom: var(--add-mode-gap); flex-shrink: 0; }
.color-btn { flex: 1; background: transparent; border: none; color: var(--text-muted); padding: 10px; cursor: pointer; font-weight: 600; border-radius: 6px; font-size: 0.95rem; }
.color-btn.active { background-color: var(--bg-panel); color: var(--text-main); box-shadow: 0 2px 4px rgba(0,0,0,0.1); }
.search-banner { background: var(--bg-input); padding: 12px 15px; border-radius: var(--radius); margin-bottom: var(--add-mode-gap); display: flex; justify-content: space-between; align-items: center; color: var(--text-main); font-size: 0.95rem; flex-shrink: 0;}
.search-banner button { background: none; border: none; color: var(--text-muted); font-weight: 600; cursor: pointer; }
.search-banner button:hover { color: var(--danger); }
::-webkit-scrollbar { width: 6px; } ::-webkit-scrollbar-track { background: transparent; } ::-webkit-scrollbar-thumb { background: var(--bg-input); border-radius: 4px; } ::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }
.hidden { display: none !important; }

        /* TRAINING RESULTS OVERLAY */
.training-results-overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100vw; height: 100vh;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(8px);
    z-index: 10000;
    display: none;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.4s ease;
}

.results-card {
    background: var(--bg-panel);
    border-radius: var(--radius);
    padding: 40px;
    max-width: 600px;
    width: 90%;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border-color);
    animation: slideUp 0.5s ease;
}

@keyframes slideUp {
    from { transform: translateY(50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.results-header {
    text-align: center;
    margin-bottom: 30px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 140px; /* keep title/subtitle visually centered in the card */
}

.results-icon {
    font-size: 4rem;
    margin-bottom: 20px;
}

.results-icon.perfect { color: var(--success); }
.results-icon.good { color: var(--primary); }
.results-icon.needs-work { color: var(--warning); }

.results-title {
    font-size: 2rem;
    font-weight: 800;
    margin: 0 0 10px 0;
    color: var(--text-main);
}

.results-subtitle {
    font-size: 1rem;
    color: var(--text-muted);
    margin: 0;
}

.results-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    margin-bottom: 30px;
    justify-items: center;
}

/* Two column layout for bot game results */
#bot-results-overlay .results-stats {
    grid-template-columns: repeat(2, 1fr);
    max-width: 500px;
    margin: 0 auto 30px auto;
}

.stat-box {
    background: var(--bg-input);
    padding: 20px;
    border-radius: var(--radius);
    text-align: center;
    border: 2px solid transparent;
    transition: all 0.3s;
}

.stat-box:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 800;
    margin: 0;
    line-height: 1;
}

.stat-value.success-color { color: var(--success); }
.stat-value.danger-color { color: var(--danger); }
.stat-value.primary-color { color: var(--primary); }

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.wrong-lines-section {
    background: var(--bg-input);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 25px;
    border-left: 4px solid var(--warning);
}

.wrong-lines-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    color: var(--warning);
    font-weight: 700;
    font-size: 1.1rem;
}

.wrong-lines-list {
    max-height: 200px;
    overflow-y: auto;
    padding-right: 10px;
}

.wrong-line-item {
    background: var(--bg-panel);
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 8px;
    font-size: 0.9rem;
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.results-question {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-main);
    margin-bottom: 20px;
    font-weight: 600;
}

.results-actions {
    display: flex;
    gap: 12px;
}

.results-btn {
    flex: 1;
    padding: 16px 24px;
    border: none;
    border-radius: var(--radius);
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.results-btn.primary {
    background: var(--warning);
    color: #000;
}

.results-btn.primary:hover {
    background: #d97706;
    transform: translateY(-2px);
}

.results-btn.secondary {
    background: var(--bg-input);
    color: var(--text-main);
}

.results-btn.secondary:hover {
    background: var(--bg-hover);
    transform: translateY(-2px);
}

.no-wrong-lines {
    text-align: center;
    padding: 30px;
}

.no-wrong-lines i {
    font-size: 3rem;
    color: var(--success);
    margin-bottom: 15px;
}

.no-wrong-lines p {
    font-size: 1.2rem;
    color: var(--text-main);
    margin: 0 0 10px 0;
    font-weight: 600;
}

.no-wrong-lines span {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Mobile board toggle button - hidden on desktop */
.mobile-board-toggle {
    display: none;
}

/* Mobile layout: board on top, menu below, avoid page scroll */
@media (max-width: 768px) {
    body { overflow: hidden; }
    .main-container { flex-direction: column; padding: 8px; height: 100vh; }

    /* Hide board by default on mobile in view mode */
    .board-area {
        flex: 0 0 0;
        min-width: 100%;
        display: none;
        align-items: center;
        justify-content: center;
        padding: 6px;
        order: 0;
        overflow: hidden;
        transition: flex-basis 0.3s ease, opacity 0.3s ease;
    }

    /* Show board when toggled */
    .board-area.mobile-visible {
        display: flex;
        flex: 0 0 45vh;
    }

    .board-wrapper {
        max-width: 100%;
        max-height: 100%;
        width: auto;
        height: 100%;
        align-items: center;
        justify-content: center;
        position: relative;
        margin: 0 auto;
    }

    /* Mobile eval bar positioning - inside the visible area */
    #eval-bar-container {
        left: -33px;
        width: 28px;
        overflow: visible;
    }

    #eval-score {
        font-size: 10px;
        white-space: nowrap;
    }

    #board {
        /* Keep the board square but constrained to its container */
        width: auto;
        height: 100%;
        max-width: 100%;
        max-height: 100%;
        aspect-ratio: 1 / 1;
        box-sizing: border-box;
    }

    .resizer { display: none; }

    .controls-area {
        flex: 1 1 auto;
        min-width: 100%;
        order: 1;
        height: 100%;
        padding: 12px;
        padding-bottom: calc(70px + env(safe-area-inset-bottom));
        overflow: auto;
    }

    /* When board is visible, adjust controls area */
    .board-area.mobile-visible ~ .controls-area {
        height: calc(100vh - 45vh - 16px);
    }

    /* Mobile board toggle button */
    .mobile-board-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        background: var(--bg-input);
        border: none;
        border-radius: 8px;
        color: var(--text-muted);
        cursor: pointer;
        transition: all 0.2s ease;
        flex-shrink: 0;
    }

    .mobile-board-toggle:hover,
    .mobile-board-toggle.active {
        background: var(--primary);
        color: var(--primary-text);
    }

    .mobile-board-toggle i {
        font-size: 1rem;
    }

    /* Hide analyze button when board is hidden on mobile */
    .view-mode-header .analyze-btn {
        display: none;
    }

    /* Show analyze button when board is visible */
    .board-area.mobile-visible ~ .controls-area .view-mode-header .analyze-btn {
        display: flex;
        padding: 8px 10px;
        width: 40px;
        height: 40px;
    }

    /* Compact view-mode header */
    .view-mode-header,
    .selection-mode-header {
        gap: 8px;
        margin-bottom: 8px;
    }

    .view-mode-header .color-switch,
    .selection-mode-header .color-switch {
        padding: 3px;
    }

    .color-btn {
        padding: 8px 12px;
        font-size: 0.85rem;
    }

    /* Make key UI elements more compact on small screens */
    .training-card { padding: 16px; }
    .header-row { padding: 10px 14px; }
    h2 { font-size: 1rem; }
    .action-group { gap: 6px; }

    /* Compact action buttons */
    .action-btn {
        padding: 10px 14px;
        font-size: 0.85rem;
        gap: 6px;
    }

    /* Ensure overlays scale on mobile */
    .training-results-overlay .results-card { max-width: 95%; padding: 20px; }
    
    /* Make lists inside controls scroll independently and only when needed */
    .controls-area .scrollable-list,
    #lines-list,
    #selection-list,
    .settings-container {
        max-height: calc(100vh - 160px);
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 60px; /* Space for absolute positioned buttons */
    }

    /* When board is visible, reduce list height */
    .board-area.mobile-visible ~ .controls-area .scrollable-list,
    .board-area.mobile-visible ~ .controls-area #lines-list,
    .board-area.mobile-visible ~ .controls-area #selection-list {
        max-height: calc(55vh - 140px);
    }

    /* Hide the clear-shapes button when creating a new line on phones */
    #add-mode .clear-shapes-btn { display: none; }

    /* Show mobile arrow drawing button on small screens */
    .arrow-btn-wrapper {
        display: flex !important;
        position: relative;
    }
    .arrow-btn-wrapper .mobile-arrow-btn {
        display: flex !important;
        padding: 8px 10px;
    }
    /* Enable touch dragging on the board and pieces */
    #board { touch-action: none; -ms-touch-action: none; }
    #board img { -webkit-user-drag: none; touch-action: none; }
    
    /* Bot style buttons responsive grid */
    .bot-style-options { grid-template-columns: repeat(2, 1fr); }
}

/* Mobile-specific tweaks for add/view/train modes */
@media (max-width: 768px) {
    /* PGN/move list in Add Mode should scroll so played moves are visible */
    #add-mode #pgn-display {
        max-height: calc(40vh);
        overflow-y: auto;
        padding: 10px;
        border-radius: 8px;
        -webkit-overflow-scrolling: touch;
        background: var(--bg-input);
    }

    /* Make training progress area smaller so more of the card is visible */
    #train-mode .training-card { padding: 12px; }
    #train-mode .progress-container { height: 6px; }
    #train-mode .active-category-title { font-size: 1.1rem; }

    /* Center the primary view buttons and keep them static (not in fixed bottom bar) */
    #view-mode .action-group,
    #add-mode .action-group,
    #selection-mode .action-group,
    #import-pgn-mode .action-group,
    #bot-setup-mode .action-group {
        position: absolute;
        left: 12px;
        right: 12px;
        bottom: calc(16px + env(safe-area-inset-bottom));
        display: flex;
        justify-content: center;
        gap: 6px;
        margin-top: 0;
        padding: 0;
        background: none;
        backdrop-filter: none;
    }

    /* Compact action buttons in view mode */
    #view-mode .action-group .action-btn,
    #add-mode .action-group .action-btn,
    #selection-mode .action-group .action-btn,
    #import-pgn-mode .action-group .action-btn,
    #bot-setup-mode .action-group .action-btn { 
        min-width: 90px;
        flex: 1;
    }

    /* Show board when in add/train/bot modes on mobile */
    body:has(#add-mode:not(.hidden)) .board-area,
    body:has(#train-mode:not(.hidden)) .board-area,
    body:has(#bot-play-mode:not(.hidden)) .board-area,
    body:has(#bot-setup-mode:not(.hidden)) .board-area {
        display: flex !important;
        flex: 0 0 45vh !important;
    }
}

/* Add-mode scrolling and limits (all screens) so played moves and notes remain visible */
#add-mode { overflow-y: auto; }
#add-mode-sections { display: flex; flex-direction: column; gap: var(--add-mode-gap); }
#add-mode-sections .add-mode-element { padding: calc(var(--add-mode-gap) / 4) 0; }
#add-mode-sections .add-mode-element > *:first-child { margin-bottom: 0; margin-top: 0; }
#add-mode #pgn-display { max-height: 50vh; overflow-y: auto; -webkit-overflow-scrolling: touch; margin-bottom: 0; }
#add-mode .note-input { max-height: 24vh; overflow-y: auto; margin-bottom: 0; margin-top: 0; }
#add-mode .analysis-section, #add-mode .explorer-section { margin-bottom: 0; }
#add-mode #category-input { margin-bottom: 0; }

/* Ensure action buttons in add mode always have gap to content above */
#add-mode .action-group { margin-top: var(--add-mode-gap); }

/* Ensure training card is centered on larger screens (override earlier rules) */
@media (min-width: 1024px) {
    #train-mode .training-dashboard { justify-content: center !important; align-items: center !important; }
    #train-mode .training-card { margin: 0 auto !important; max-width: 520px; }
}

/* CONTEXT MENU */
.context-menu {
    position: fixed;
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    border-radius: 8px;
    padding: 5px 0;
    z-index: 20000;
    min-width: 160px;
}

.context-menu-item {
    padding: 10px 15px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-main);
    font-size: 0.9rem;
    transition: background 0.15s ease;
}
.context-menu-item i {
    transition: color 0.15s ease;
}
.context-menu-item:hover {
    background: var(--bg-hover);
}
.context-menu-item:hover i {
    color: var(--danger);
}

/* Blue icon for view position */
#ctx-view-position:hover i {
    color: var(--primary);
}

/* Green icon for annotation */
#ctx-add-annotation:hover i {
    color: var(--success);
}

/* Green hover for annotation submenu items (symbols only, no icons) */
.context-submenu .context-menu-item {
    transition: background 0.15s ease, color 0.15s ease;
}
.context-submenu .context-menu-item:hover {
    color: var(--success);
    background: var(--bg-hover);
}

.context-menu-item i { width: 20px; text-align: center; }

.move-span {
    cursor: pointer;
    padding: 2px 4px;
    border-radius: 4px;
    transition: background 0.2s;
}
.move-span:hover {
    background-color: var(--bg-hover);
    color: var(--primary);
}
.move-span.active-move {
    color: var(--primary);
    font-weight: 600;
}

/* Context submenu for annotations */
.context-submenu {
    border-top: 1px solid var(--border-color);
    margin-top: 4px;
    padding-top: 4px;
    max-height: 132px; /* Shows approximately 3 items */
    overflow-y: auto;
    overscroll-behavior: contain;
}
.context-submenu .context-menu-item {
    padding-left: 38px; /* align with icon spacing */
}

/* Opening Explorer Styles */
.explorer-section {
    background: var(--bg-input);
    border-radius: var(--radius);
    padding: 12px;
    margin-bottom: 15px;
    border: 1px solid var(--border-color);
}

.explorer-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: calc(var(--add-mode-gap) * 0.8);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.explorer-header i {
    color: var(--primary);
}

.explorer-stats {
    margin-left: auto;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.explorer-moves {
    display: flex;
    flex-direction: column;
    gap: calc(var(--add-mode-gap) / 3);
    max-height: calc(5 * 34px + 4 * 4px + 6px); /* 5 moves + gaps + buffer */
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding-right: 4px;
}

.explorer-placeholder {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    padding: 20px;
    font-style: italic;
}

.explorer-move {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    background: var(--bg-panel);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.15s ease;
    border: 1px solid transparent;
}

.explorer-move:hover {
    background: var(--bg-hover);
    border-color: var(--primary);
    transform: translateX(2px);
}

.explorer-move-san {
    font-weight: 700;
    font-family: monospace;
    color: var(--text-main);
    min-width: 60px;
}

.explorer-move-bar {
    flex: 1;
    height: 18px;
    background: var(--bg-input);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
    display: flex;
}

.explorer-bar-segment {
    height: 100%;
    transition: width 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.65rem;
    font-weight: 600;
    overflow: hidden;
    white-space: nowrap;
}

.explorer-bar-white {
    background: #e0e0e0;
    color: #333;
}

.explorer-bar-draw {
    background: #94a3b8;
    color: #fff;
}

.explorer-bar-black {
    background: #4a5568;
    color: #fff;
}

.explorer-move-stats {
    display: flex;
    gap: 6px;
    font-size: 0.7rem;
    color: var(--text-muted);
    min-width: 50px;
    justify-content: flex-end;
    align-items: center;
}

.explorer-move-games {
    font-weight: 600;
    color: var(--text-muted);
}

.explorer-loading {
    text-align: center;
    color: var(--primary);
    padding: 15px;
    font-size: 0.85rem;
}

.explorer-error {
    text-align: center;
    color: var(--danger);
    padding: 15px;
    font-size: 0.85rem;
}

.bot-setup-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-shrink: 0;
}

.bot-setup-title {
    font-size: 1.1rem;
    margin: 0;
}

.bot-setup-card {
    margin-bottom: 20px;
}

.bot-line-preview {
    font-style: italic;
    margin-top: 10px;
    line-height: 1.4;
}

/* Bot style selection */
.bot-style-options {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin: 12px 0;
}

.bot-style-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 12px 8px;
    background: var(--bg-input);
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-muted);
}

.bot-style-btn i {
    font-size: 1.2rem;
}

.bot-style-btn span {
    font-size: 0.7rem;
    font-weight: 600;
}

.bot-style-btn:hover {
    border-color: var(--primary);
    color: var(--text-main);
}

.bot-style-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.bot-style-description {
    font-size: 0.8rem;
    color: white;
    text-align: center;
    min-height: 2.4em;
}

.bot-play-style {
    font-size: 0.85rem;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 8px;
}

/* Settings mode header */
.settings-mode-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-shrink: 0;
}

.settings-mode-header h2 {
    font-size: 1.1rem;
    margin: 0;
}

/* Data management section */
.data-management-box {
    background: var(--bg-input);
    padding: 15px;
    border-radius: var(--radius);
    text-align: center;
}

.data-management-box p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 15px;
}

.data-management-actions {
    display: flex;
    gap: 10px;
}

#import-file {
    display: none;
}

/* Color dots for board theme options */
.color-dot {
    background: #769656;
}

/* Add mode header */
.add-mode-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    flex-shrink: 0;
}

.add-mode-header h2 {
    margin: 0;
    font-size: 1.1rem;
}

.add-mode-buttons {
    display: flex;
    gap: 8px;
}

/* Analyze button */
.analyze-btn {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 6px 12px;
    font-size: 0.8rem;
    color: var(--text-main);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s ease;
}

.analyze-btn:hover {
    background: var(--bg-hover);
    border-color: var(--primary);
}

.analyze-btn.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.analyze-btn i {
    font-size: 0.85rem;
}

/* Analysis section */
.analysis-section {
    background: var(--bg-input);
    border-radius: var(--radius);
    padding: 12px;
    margin-bottom: 15px;
    border: 1px solid var(--primary);
}

.analysis-controls {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 10px;
}

#analysis-depth-select,
#analysis-lines-select {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 3px 6px;
    font-size: 0.7rem;
    color: var(--text-main);
    cursor: pointer;
}

#analysis-depth-select:hover,
#analysis-lines-select:hover {
    border-color: var(--primary);
}

.analysis-depth {
    font-size: 0.75rem;
    color: var(--text-muted);
    min-width: 55px;
    text-align: right;
}

.analysis-move-eval {
    font-family: monospace;
    font-size: 0.8rem;
    font-weight: 600;
    min-width: 50px;
    text-align: center;
    padding: 2px 6px;
    border-radius: 4px;
}

.analysis-move-eval.positive {
    background: #f0f0f0;
    color: #1a1a1a;
}

.analysis-move-eval.negative {
    background: #2a2a2a;
    color: #f0f0f0;
}

.analysis-move-eval.neutral {
    background: #f0f0f0;
    color: #1a1a1a;
}

.analysis-line {
    flex-wrap: nowrap;
}

.analysis-pv {
    flex: 1;
    font-family: monospace;
    font-size: 0.75rem;
    color: var(--text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    padding-left: 8px;
}

/* PGN display */
#pgn-display {
    background: var(--bg-input);
    padding: 15px;
    border-radius: var(--radius);
    font-family: monospace;
    margin-bottom: 15px;
    flex-grow: 1;
    overflow-y: auto;
    font-size: 0.9rem;
    color: var(--text-main);
    min-height: 120px;
    line-height: 1.8;
}

/* Selection mode header */
.selection-mode-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    margin-bottom: var(--add-mode-gap);
    flex-shrink: 0;
}
.selection-mode-header .color-switch {
    margin-bottom: 0;
    flex: 1;
}

/* Arrow button wrapper for popup positioning - hidden on desktop */
.arrow-btn-wrapper {
    position: relative;
    display: none;
}

/* Mobile arrow drawing button - shown via media query */
.mobile-arrow-btn.active {
    background: var(--primary) !important;
    color: var(--primary-text) !important;
}

/* Arrow color popup */
.arrow-color-popup {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 8px;
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 8px;
    display: flex;
    gap: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    z-index: 100;
}
.arrow-color-popup.hidden {
    display: none;
}
.arrow-color-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 3px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease;
}
.arrow-color-btn:hover {
    transform: scale(1.1);
}
.arrow-color-btn.active {
    border-color: var(--text-main);
}

/* Arrow draw mode highlight for first selected square */
.arrow-draw-start {
    box-shadow: inset 0 0 0 4px var(--primary) !important;
}

/* Bot accuracy stat */
#bot-accuracy {
    color: var(--text-muted);
}

/* Color dots for board theme options - specific colors */
.color-dot-green { background: #769656; }
.color-dot-brown { background: #b58863; }
.color-dot-blue { background: #8ca2ad; }
.color-dot-gray { background: #707070; }
.color-dot-purple { background: #8b5cf6; }
.color-dot-teal { background: #0d9488; }

/* Danger text color */
.danger-text {
    color: var(--danger);
}

/* Search filter icon */
.search-filter-icon {
    margin-right: 8px;
    color: var(--primary);
}

/* --- TREE VIEW STYLES --- */
.tree-container {
    font-family: 'Inter', 'Segoe UI', sans-serif;
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-main);
    padding: 5px;
}

.tree-line {
    display: block;
    margin-top: 6px;    /* CHANGED: Used to be margin-bottom */
    margin-bottom: 0;   /* Reset bottom margin */
}

/* Indentation for branches */
.tree-indent-level-0 { margin-left: 0; }
.tree-indent-level-1 { margin-left: 20px; border-left: 2px solid var(--border-color); padding-left: 8px; }
.tree-indent-level-2 { margin-left: 40px; border-left: 2px solid var(--border-color); padding-left: 8px; }
.tree-indent-level-3 { margin-left: 60px; border-left: 2px solid var(--border-color); padding-left: 8px; }
.tree-indent-level-4 { margin-left: 80px; border-left: 2px solid var(--border-color); padding-left: 8px; }
.tree-indent-level-5 { margin-left: 100px; border-left: 2px solid var(--border-color); padding-left: 8px; }

.tree-arrow {
    display: inline-block;
    /* "The sides should be the same length" */
    width: 14px;
    height: 14px; 
    
    /* Create the L-shape using borders */
    border-left: 2px solid var(--text-muted);
    border-bottom: 2px solid var(--text-muted);
    
    /* Positioning */
    margin-right: 10px;
    margin-bottom: 4px; /* Adjusts alignment relative to text baseline */
    
    /* Reset old styles */
    transform: none;
    font-size: 0; /* Hides text if any remains inside */
    box-sizing: border-box;
}

.tree-move {
    font-weight: 600;
    color: var(--text-main);
    cursor: pointer;
    padding: 1px 4px;
    border-radius: 4px;
    transition: background 0.2s, color 0.2s;
}

.tree-move:hover {
    background: var(--bg-hover);
    color: var(--primary);
}

.tree-move-highlighted {
    color: var(--primary);
    background: rgba(59, 130, 246, 0.15);
}

.tree-move-highlighted-rep {
    color: var(--warning);
    background: rgba(245, 158, 11, 0.15);
}

.tree-dots {
    color: var(--text-muted);
    letter-spacing: 1px;
    margin: 0 4px;
}

/* The marker shown when a node represents a saved line */
.tree-line-marker {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    margin-left: 6px;
    
    /* ÄNDERUNG: Kein Rahmen, kein Hintergrund */
    background: transparent;
    border: none;
    
    border-radius: 4px;
    color: var(--text-muted); /* Standardfarbe etwas dezenter */
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s;
    vertical-align: middle;
}

.tree-line-marker:hover {
    /* Beim Hover ein leichter Hintergrund statt Rahmen */
    background: var(--bg-hover);
    color: var(--primary);
    transform: scale(1.1);
}

.tree-line-marker.repetition {
    color: var(--warning);
}

/* Tree checkbox for selection mode */
.tree-line-checkbox {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    margin-left: 4px;
    cursor: pointer;
    color: var(--text-muted);
    transition: color 0.2s, transform 0.2s;
    vertical-align: middle;
}

.tree-line-checkbox input[type="checkbox"] {
    display: none;
}

.tree-line-checkbox i {
    font-size: 1rem;
}

.tree-line-checkbox:has(input:checked) {
    color: var(--success);
}

.tree-line-checkbox:has(input:not(:checked)) i::before {
    content: "\f0c8"; /* fa-square (empty) */
}

.tree-line-checkbox:hover {
    transform: scale(1.1);
}

.tree-line-checkbox.repetition:has(input:checked) {
    color: var(--warning);
}

.selection-tree .tree-move {
    cursor: default;
}

/* Selection checkbox for standard list view */
.selection-checkbox {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    margin-right: 8px;
    cursor: pointer;
    color: var(--text-muted);
    transition: color 0.2s;
}

.selection-checkbox input[type="checkbox"] {
    display: none;
}

.selection-checkbox i {
    font-size: 1rem;
}

.selection-checkbox:has(input:checked) {
    color: var(--success);
}

.selection-checkbox:has(input:not(:checked)) i::before {
    content: "\f0c8"; /* fa-square (empty) */
}

.selection-checkbox.repetition:has(input:checked) {
    color: var(--warning);
}

.selection-item {
    cursor: pointer;
}

/* Context menu for tree items */
.tree-action-menu {
    position: absolute;
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 15px rgba(0,0,0,0.4);
    border-radius: 8px;
    padding: 5px;
    z-index: 10000;
    display: flex;
    gap: 5px;
    animation: fadeIn 0.2s ease;
}

.tree-action-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 8px;
    border-radius: 4px;
    cursor: pointer;
    transition: 0.2s;
}

.tree-action-btn:hover { background: var(--bg-hover); color: var(--text-main); }
.tree-action-btn.edit:hover { color: var(--primary); }
.tree-action-btn.del:hover { color: var(--danger); }
.tree-action-btn.bot:hover { color: var(--success); }
.tree-action-btn.rep:hover { color: var(--warning); }

/* Hide list items when in tree mode */
.category-content.tree-mode .line-item { display: none; } /*Tree

/* --- PGN IMPORT MODE --- */
#import-pgn-mode { overflow-y: auto; }
#import-mode-sections { display: flex; flex-direction: column; gap: var(--add-mode-gap); }
#import-mode-sections .add-mode-element { padding: calc(var(--add-mode-gap) / 4) 0; }
#import-mode-sections .add-mode-element > *:first-child { margin-bottom: 0; margin-top: 0; }
#import-category-input { margin-bottom: 0; }

.import-pgn-textarea {
    min-height: 180px;
    max-height: 40vh;
    resize: vertical;
    font-family: 'Fira Code', 'Monaco', monospace;
    margin-bottom: 0;
    margin-top: 0;
}

.import-preview-section {
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 0;
}

.import-preview-section .explorer-moves {
    max-height: 25vh;
    overflow-y: auto;
}

/* Import lines use same styling as home page .line-item */
#import-lines-list .line-item {
    margin-bottom: 0;
}

.import-line-edit-input {
    flex: 1;
    background: var(--bg-panel);
    border: 2px solid var(--primary);
    border-radius: 6px;
    padding: 6px 10px;
    color: var(--text-main);
    font-family: 'Fira Code', 'Monaco', monospace;
    font-size: 0.85rem;
    outline: none;
}

#import-execute-btn:disabled {
    cursor: not-allowed;
}