/*
  file-tree.css — Interactive collapsible file/directory tree.
  All classes prefixed .ft-
*/

/*---FT_BASE---*/

.ft {
    font-family: var(--font-mono);
    font-size: .79rem;
    line-height: 1;
    display: flex;
    flex-direction: column;
    gap: 0;
}

/*---FT_TOOLBAR---*/

.ft-toolbar {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 8px;
    border-bottom: 1px solid var(--border-subtle);
    margin-bottom: 4px;
}

.ft-search-wrap {
    position: relative;
    flex: 1;
    min-width: 100px;
    display: flex;
    align-items: center;
}

.ft-search-icon {
    position: absolute;
    left: 8px;
    color: var(--text-muted);
    font-size: .65rem;
    pointer-events: none;
}

.ft-search-input {
    width: 100%;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 4px 24px 4px 26px;
    font-size: .74rem;
    font-family: var(--font-mono);
    color: var(--text-main);
    outline: none;
    transition: border-color .15s;
}

.ft-search-input:focus { border-color: var(--brand); }
.ft-search-input::placeholder { color: var(--text-muted); }

.ft-search-clear {
    position: absolute;
    right: 5px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: .6rem;
    cursor: pointer;
    padding: 2px;
    display: flex;
    align-items: center;
    line-height: 1;
    transition: color .12s;
}

.ft-search-clear:hover { color: var(--text-main); }

.ft-toolbar-actions {
    display: flex;
    gap: 3px;
    flex-shrink: 0;
}

.ft-toolbar-btn {
    width: 27px;
    height: 27px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-size: .65rem;
    cursor: pointer;
    transition: color .12s, border-color .12s, background .12s;
    flex-shrink: 0;
}

.ft-toolbar-btn:hover {
    color: var(--brand);
    border-color: var(--brand);
    background: var(--brand-dim);
}

.ft-toolbar-btn--download:hover {
    color: #22c55e;
    border-color: #22c55e;
    background: rgba(34,197,94,.08);
}

/*---FT_BODY---*/

.ft-body {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
}

/*---FT_ROW---*/

.ft-row {
    display: flex;
    align-items: center;
    gap: 6px;
    padding-top: 4px;
    padding-bottom: 4px;
    padding-right: 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    user-select: none;
    transition: background var(--transition);
}

.ft-row:hover { background: var(--bg-elevated); }

.ft-row--dir  { color: var(--text-main); }
.ft-row--file { color: var(--text-secondary); }
.ft-row--file:hover { color: var(--text-main); }

.ft-row--selected {
    background: var(--brand-dim) !important;
    color: var(--brand) !important;
}

/*---FT_CHEVRON---*/

.ft-chevron {
    flex-shrink: 0;
    font-size: .55rem;
    color: var(--text-muted);
    width: 10px;
    text-align: center;
}

/*---FT_ICON---*/

.ft-icon {
    flex-shrink: 0;
    font-size: .72rem;
    width: 13px;
    text-align: center;
}

/*---FT_NAME---*/

.ft-name {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/*---FT_COUNT---*/

.ft-count {
    flex-shrink: 0;
    font-size: .62rem;
    color: var(--text-muted);
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: 99px;
    padding: 0 5px;
    font-family: var(--font-sans);
}

/*---FT_NO_MATCH---*/

.ft-no-match {
    font-size: .68rem;
    color: var(--text-muted);
    padding-top: 3px;
    padding-bottom: 3px;
    font-style: italic;
    font-family: var(--font-sans);
}

/*---FT_EMPTY---*/

.ft-empty {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 32px 16px;
    color: var(--text-muted);
    font-size: .8rem;
    font-family: var(--font-sans);
}

.ft-empty i { font-size: 1rem; }

/*---FT_SKELETON---*/

.ft-skeleton {
    height: 13px;
    background: var(--bg-elevated);
    border-radius: var(--radius-sm);
    margin: 5px 8px;
    animation: ft-pulse 1.4s ease-in-out infinite;
}

@keyframes ft-pulse {
    0%, 100% { opacity: 1; }
    50%       { opacity: .35; }
}

/*---FT_PREVIEW---*/

.ft-preview {
    border-top: 1px solid var(--border);
    margin-top: 8px;
    display: flex;
    flex-direction: column;
}

.ft-preview-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 12px;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border-subtle);
    font-size: .75rem;
    overflow: hidden;
}

.ft-preview-icon {
    color: var(--brand);
    font-size: .72rem;
    flex-shrink: 0;
}

.ft-preview-name {
    font-family: var(--font-mono);
    color: var(--text-main);
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 0;
}

.ft-preview-path {
    font-family: var(--font-mono);
    font-size: .68rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 0;
    flex: 1;
}

.ft-preview-actions {
    display: flex;
    gap: 3px;
    margin-left: auto;
    flex-shrink: 0;
}

.ft-preview-btn {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-size: .65rem;
    cursor: pointer;
    transition: color .12s, border-color .12s;
}

.ft-preview-btn:hover { color: var(--text-main); border-color: var(--border); }

.ft-preview-body {
    position: relative;
    max-height: 340px;
    overflow-y: auto;
    background: #0d1117;
}

.ft-preview-code {
    margin: 0;
    padding: 14px 16px;
    font-size: .76rem;
    font-family: var(--font-mono);
    color: #c9d1d9;
    white-space: pre;
    overflow-x: auto;
    line-height: 1.65;
    scrollbar-width: thin;
    scrollbar-color: #30363d #0d1117;
}

.ft-preview-loading,
.ft-preview-error,
.ft-preview-no-fn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 20px 16px;
    font-size: .78rem;
    font-family: var(--font-sans);
    color: #7d8590;
}

.ft-preview-error { color: #f87171; }