/* Base layout styles */
html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Column Resizer */
.column-resizer {
    width: 1px;
    background-color: var(--border-color);
    cursor: col-resize;
    transition: background-color 0.2s ease, width 0.2s ease, box-shadow 0.2s ease;
    user-select: none;
    flex-shrink: 0;
    padding: 0 3px;  /* Add invisible padding for easier grab */
    margin: 0 -3px;  /* Compensate for padding */
}

.column-resizer:hover {
    background-color: var(--link-color);
    width: 1px;
    box-shadow: 0 0 6px rgba(13, 110, 253, 0.3);  /* Visual feedback instead of width change */
}

.column-resizer.dragging {
    background-color: var(--link-color);
    box-shadow: 0 0 8px rgba(13, 110, 253, 0.5);
}

.column-resizer.dragging {
    background-color: var(--link-color);
}

/* Adjust container for flex layout */
.container-fluid {
    display: flex;
    flex-direction: row;
    height: calc(100% - 56px);
    padding: 0;
}

.row {
    width: 100%;
    display: flex;
    flex-direction: row;
    margin: 0;
    height: 100%;
}

#sidebarPane {
    flex: 0 0 20%;
    min-width: 150px;
    max-width: 40%;
    padding: 0;
}

#editorPane {
    flex: 1 1 40%;
    min-width: 250px;
    max-width: 70%;
    padding: 0;
}

#previewPane {
    flex: 1 1 40%;
    min-width: 250px;
    max-width: 70%;
    padding: 0;
}

/* Sidebar - improved */
.sidebar {
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    overflow-x: hidden;
    height: 100%;
    transition: background-color 0.3s ease;
    display: flex;
    flex-direction: column;
}

.sidebar h6 {
    margin: 12px 8px 6px;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

#fileTree {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 4px 0;
}

/* Navbar */
.navbar {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.3s ease;
}

.navbar-brand {
    color: var(--text-primary) !important;
    font-weight: 600;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 5px;
}

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