:root {
    --bg-body: #fdfdfd;
    --bg-header: #000;
    --bg-panel: #fff;
    --bg-panel-header: #f8f9fa;
    --border-color: #e0e0e0;
    --border-tree: #e9ecef;
    --text-main: #212529;
    --text-muted: #6c757d;
    --text-header: #fff;
    --btn-bg: #34495e;
    --btn-hover: #4a6278;
    --primary: #3498db;
    --primary-hover: #2980b9;
    
    --tree-hover: #f1f3f5;
    --tree-active: #e7f1ff;
    --tree-active-text: #0056b3;
    
    --danger-color: #e74c3c;
    --success-color: #2ecc71;
    --locked-bg: #f8f9fa;
    --locked-text: #a5a5a5;
    --badge-bg: #fff3e0;
    --badge-text: #e67e22;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-body: #121212;
        --bg-header: #1e1e1e;
        --bg-panel: #181818;
        --bg-panel-header: #202020;
        --border-color: #333;
        --border-tree: #333;
        --text-main: #e0e0e0;
        --text-muted: #9e9e9e;
        --text-header: #e0e0e0;
        --btn-bg: #2d3748;
        --btn-hover: #4a5568;
        --primary: #3182ce;
        --primary-hover: #2b6cb0;
        
        --tree-hover: #2a2a2a;
        --tree-active: #1a365d;
        --tree-active-text: #63b3ed;
        
        --locked-bg: #2d2d2d;
        --locked-text: #666;
        --badge-bg: #4a3620;
        --badge-text: #ed8936;
    }
}

body { 
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; 
    margin: 0; 
    padding: 0; 
    background: var(--bg-body); 
    color: var(--text-main);
    height: 100dvh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

header { 
    background: var(--bg-header); 
    color: var(--text-header); 
    padding: 0.5rem 1.5rem; 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    z-index: 100;
}

header h1 { font-size: 1.2rem; margin: 0; }

.controls { display: flex; gap: 10px; align-items: center; }

button {
    background: var(--btn-bg);
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: background 0.2s;
}

button:hover { background: var(--btn-hover); }

select {
    padding: 5px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background: var(--bg-panel);
    color: var(--text-main);
}

main { 
    flex: 1;
    overflow: hidden;
    position: relative;
}

#split-container {
    display: flex;
    height: 100%;
    width: 100%;
}

#left-panel {
    width: 350px;
    min-width: 250px;
    background: var(--bg-panel);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

#left-panel-header {
    padding: 10px;
    background: var(--bg-panel-header);
    border-bottom: 1px solid var(--border-color);
}

.tree-controls { display: flex; gap: 8px; }
.tree-controls button {
    flex: 1;
    background: var(--bg-panel);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}
.tree-controls button:hover { background: var(--tree-hover); }

.filter-controls {
    margin-top: 10px;
    display: flex;
    align-items: center;
}

.toggle-container {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--text-main);
    user-select: none;
}

.toggle-container input {
    margin-right: 8px;
    cursor: pointer;
}

#search-keys {
    width: 100%;
    margin-top: 10px;
    padding: 6px;
    box-sizing: border-box;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-panel);
    color: var(--text-main);
    outline: none;
}
#search-keys:focus { border-color: var(--primary); }

#keys-tree {
    flex: 1;
    overflow-y: auto;
    padding: 10px 0;
}

#resizer {
    width: 4px;
    cursor: col-resize;
    background: var(--border-color);
    transition: background 0.2s;
}
#resizer:hover, #resizer.dragging { background: var(--primary); }

#right-panel {
    flex: 1;
    background: var(--bg-body);
    overflow: hidden;
    padding: 20px;
}

.tree-node { user-select: none; position: relative; }

.tree-children {
    display: none;
    padding-left: 20px;
    margin-left: 10px;
    border-left: 1px solid var(--border-tree);
}
.tree-children.open { display: block; }

.tree-label {
    padding: 6px 12px;
    cursor: pointer;
    border-radius: 0 4px 4px 0;
    display: flex;
    align-items: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: 0.85rem;
    color: var(--text-main);
    margin: 1px 10px 1px 0;
    transition: all 0.1s;
}

.tree-label:hover { background: var(--tree-hover); }

.tree-label.active {
    background: var(--tree-active);
    color: var(--tree-active-text);
    font-weight: 500;
}

.tree-label.tree-folder::before {
    content: '\25B6';
    display: inline-block;
    margin-right: 8px;
    font-size: 0.65rem;
    color: var(--text-muted);
    transition: transform 0.2s;
    width: 14px;
    text-align: center;
}
.tree-label.tree-folder.open::before { transform: rotate(90deg); }

.tree-label.tree-file::before {
    content: ''; 
    margin-right: 8px;
    width: 14px;
    display: inline-block;
}

.tree-label.active.tree-folder::before,
.tree-label.active.tree-file::before {
    color: var(--tree-active-text);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 8px;
    flex-shrink: 0;
}
.status-red { background-color: var(--danger-color); box-shadow: 0 0 5px rgba(231, 76, 60, 0.4); }
.status-green { background-color: var(--success-color); box-shadow: 0 0 5px rgba(46, 204, 113, 0.4); }

.label-text { overflow: hidden; text-overflow: ellipsis; }

.tree-label.locked { color: var(--locked-text); cursor: not-allowed; background: var(--locked-bg); }

.lock-badge, .parent-lock-badge {
    margin-left: auto;
    font-size: 0.7rem;
    color: var(--badge-text);
    background: var(--badge-bg);
    padding: 2px 6px;
    border-radius: 10px;
    font-style: italic;
}

.locked-editor { background-color: var(--locked-bg) !important; color: var(--locked-text) !important; }

@keyframes flash-green {
    0% { background-color: rgba(46, 204, 113, 0.3); }
    100% { background-color: transparent; }
}
.flash-update { animation: flash-green 1.5s ease-out; }

#editor {
    display: flex;
    flex-direction: column;
    height: 100%;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    background: var(--bg-panel);
}

#editor-header {
    background: var(--bg-panel-header);
    padding: 10px 15px;
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    font-size: 0.95rem;
}

.editor-content {
    flex: 1;
    border: none;
    padding: 15px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 1rem;
    resize: none;
    outline: none;
    line-height: 1.5;
    background: transparent;
    color: var(--text-main);
    overflow-y: auto;
    white-space: pre-wrap;
    word-break: break-word;
}
.editor-content:empty:before {
    content: attr(placeholder);
    color: var(--text-muted);
}
.editor-content[contenteditable="false"] {
    background: var(--bg-body);
    cursor: not-allowed;
}

.macro {
    background-color: rgba(255, 241, 118, 0.6);
    color: #000;
    padding: 2px 6px;
    border-radius: 4px;
    margin: 0 2px;
    cursor: pointer;
    user-select: none;
    display: inline-block;
    border: 1px solid rgba(251, 192, 45, 0.8);
    font-weight: 500;
    transition: all 0.2s;
    line-height: 1;
}

.macro:hover {
    background-color: rgba(255, 238, 88, 0.8);
}

.macro.expanded {
    background-color: rgba(225, 245, 254, 0.7);
    border-color: rgba(129, 212, 250, 0.9);
}

#editor-footer {
    padding: 8px 15px;
    background: var(--bg-panel-header);
    border-top: 1px solid var(--border-color);
    font-size: 0.8rem;
    color: var(--text-muted);
}


.login-page { display: flex; justify-content: center; align-items: center; background: #2c3e50; }
.login-box { background: var(--bg-panel); padding: 2.5rem; border-radius: 8px; box-shadow: 0 10px 25px rgba(0,0,0,0.3); text-align: center; width: 350px; }
.login-box h2 { margin-top: 0; color: var(--text-main); }
.login-box input { display: block; width: 100%; margin: 1.2rem 0; padding: 0.7rem; border: 1px solid var(--border-color); border-radius: 4px; box-sizing: border-box; background: var(--bg-body); color: var(--text-main);}
.login-box button { width: 100%; background: var(--primary); color: white; border: none; padding: 0.7rem; cursor: pointer; border-radius: 4px; font-weight: bold; }
.login-box button:hover { background: var(--primary-hover); }


/* Responsive adjustments */
@media screen and (max-width: 768px) {
    #split-container {
        flex-direction: column;
    }

    #left-panel {
        width: 100% !important;
        height: 40% !important;
        min-height: 40% !important;
        min-width: 100%;
        border-right: none;
        border-bottom: 2px solid var(--primary);
    }

    #resizer {
        display: none;
    }

    #right-panel {
        width: 100% !important;
        flex: 1;
        padding: 10px;
        box-sizing: border-box;
        display: flex;
        flex-direction: column;
        min-height: 0;
    }

    #editor {
        flex: 1;
        display: flex;
        flex-direction: column;
        min-height: 0;
    }

    .editor-content {
        flex: 1;
        min-height: 0;
        overflow-y: auto;
    }

    header {
        padding: 0.5rem 1rem;
    }

    header h1 {
        font-size: 1rem;
    }

    .tree-controls button {
        font-size: 0.75rem;
        padding: 5px 8px;
    }

    #editor-header, #editor-footer {
        padding: 8px 10px;
        flex-shrink: 0;
    }
}