/* ════════════════════════════════════════════════════════════════════════════
   Frontend Studio — IDE Stylesheet
   ════════════════════════════════════════════════════════════════════════════ */

/* ── Reset & Base ─────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; overflow: hidden; font-size: 13px; }
body { font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif; }
button { cursor: pointer; border: none; background: none; font: inherit; }
input, select, textarea { font: inherit; }
a { text-decoration: none; }

/* ── Themes ───────────────────────────────────────────────────────────────── */
:root,
[data-theme="dark"] {
  --fs-bg:            #1e1e1e;
  --fs-surface:       #252526;
  --fs-surface2:      #2d2d2d;
  --fs-surface3:      #3c3c3c;
  --fs-border:        #3c3c3c;
  --fs-border2:       #454545;
  --fs-text:          #cccccc;
  --fs-text-dim:      #858585;
  --fs-text-sub:      #6a6a6a;
  --fs-accent:        #007acc;
  --fs-accent-hover:  #1a8ad4;
  --fs-accent-light:  rgba(0,122,204,.15);
  --fs-actbar-bg:     #333333;
  --fs-actbar-icon:   #858585;
  --fs-actbar-active: #ffffff;
  --fs-sidebar-bg:    #252526;
  --fs-tab-bg:        #2d2d2d;
  --fs-tab-active-bg: #1e1e1e;
  --fs-tab-text:      #969696;
  --fs-tab-active-text:#ffffff;
  --fs-tab-border:    #252526;
  --fs-editor-bg:     #1e1e1e;
  --fs-status-bg:     #007acc;
  --fs-status-text:   #ffffff;
  --fs-titlebar-bg:   #323233;
  --fs-titlebar-text: #cccccc;
  --fs-bottom-bg:     #1e1e1e;
  --fs-bottom-tab-bg: #252526;
  --fs-scroll-thumb:  rgba(121,121,121,.4);
  --fs-scroll-track:  transparent;
  --fs-input-bg:      #3c3c3c;
  --fs-input-border:  #555;
  --fs-btn-bg:        #0e639c;
  --fs-btn-hover:     #1177bb;
  --fs-btn-ghost-bg:  transparent;
  --fs-btn-ghost-hover: rgba(255,255,255,.07);
  --fs-danger:        #f14c4c;
  --fs-warning:       #cca700;
  --fs-success:       #4ec994;
  --fs-preview-bg:    #1e1e1e;
  --fs-ctx-bg:        #252526;
  --fs-ctx-border:    #454545;
  --fs-shadow:        0 8px 32px rgba(0,0,0,.5);
  --fs-shadow-sm:     0 2px 8px rgba(0,0,0,.4);
  --fs-radius:        4px;
  --fs-radius-lg:     8px;
}

[data-theme="light"] {
  --fs-bg:            #ffffff;
  --fs-surface:       #f3f3f3;
  --fs-surface2:      #ececec;
  --fs-surface3:      #e0e0e0;
  --fs-border:        #e4e4e4;
  --fs-border2:       #d1d1d1;
  --fs-text:          #1f1f1f;
  --fs-text-dim:      #6f6f6f;
  --fs-text-sub:      #9f9f9f;
  --fs-accent:        #005fb8;
  --fs-accent-hover:  #0069cc;
  --fs-accent-light:  rgba(0,95,184,.1);
  --fs-actbar-bg:     #2c2c2c;
  --fs-actbar-icon:   #8a8a8a;
  --fs-actbar-active: #ffffff;
  --fs-sidebar-bg:    #f3f3f3;
  --fs-tab-bg:        #ececec;
  --fs-tab-active-bg: #ffffff;
  --fs-tab-text:      #6f6f6f;
  --fs-tab-active-text:#1f1f1f;
  --fs-tab-border:    #f3f3f3;
  --fs-editor-bg:     #ffffff;
  --fs-status-bg:     #005fb8;
  --fs-status-text:   #ffffff;
  --fs-titlebar-bg:   #dddddd;
  --fs-titlebar-text: #1f1f1f;
  --fs-bottom-bg:     #f3f3f3;
  --fs-bottom-tab-bg: #ececec;
  --fs-scroll-thumb:  rgba(100,100,100,.3);
  --fs-scroll-track:  transparent;
  --fs-input-bg:      #ffffff;
  --fs-input-border:  #c8c8c8;
  --fs-btn-bg:        #005fb8;
  --fs-btn-hover:     #0069cc;
  --fs-btn-ghost-bg:  transparent;
  --fs-btn-ghost-hover: rgba(0,0,0,.06);
  --fs-danger:        #d32f2f;
  --fs-warning:       #b08000;
  --fs-success:       #177842;
  --fs-preview-bg:    #f3f3f3;
  --fs-ctx-bg:        #ffffff;
  --fs-ctx-border:    #d1d1d1;
  --fs-shadow:        0 8px 32px rgba(0,0,0,.15);
  --fs-shadow-sm:     0 2px 8px rgba(0,0,0,.1);
}

[data-theme="hc"] {
  --fs-bg:            #000000;
  --fs-surface:       #0d0d0d;
  --fs-surface2:      #1a1a1a;
  --fs-surface3:      #262626;
  --fs-border:        #6fc3df;
  --fs-border2:       #6fc3df;
  --fs-text:          #ffffff;
  --fs-text-dim:      #c0c0c0;
  --fs-text-sub:      #a0a0a0;
  --fs-accent:        #6fc3df;
  --fs-accent-hover:  #89d4f0;
  --fs-accent-light:  rgba(111,195,223,.2);
  --fs-actbar-bg:     #000000;
  --fs-actbar-icon:   #ffffff;
  --fs-actbar-active: #6fc3df;
  --fs-sidebar-bg:    #0d0d0d;
  --fs-tab-bg:        #000000;
  --fs-tab-active-bg: #000000;
  --fs-tab-text:      #c0c0c0;
  --fs-tab-active-text:#ffffff;
  --fs-tab-border:    #6fc3df;
  --fs-editor-bg:     #000000;
  --fs-status-bg:     #6fc3df;
  --fs-status-text:   #000000;
  --fs-titlebar-bg:   #000000;
  --fs-titlebar-text: #ffffff;
  --fs-bottom-bg:     #000000;
  --fs-bottom-tab-bg: #0d0d0d;
  --fs-ctx-bg:        #000000;
  --fs-ctx-border:    #6fc3df;
}

[data-theme="monokai"] {
  --fs-bg:            #272822;
  --fs-surface:       #2d2e27;
  --fs-surface2:      #3b3c35;
  --fs-surface3:      #494a42;
  --fs-border:        #49483e;
  --fs-border2:       #75715e;
  --fs-text:          #f8f8f2;
  --fs-text-dim:      #90918b;
  --fs-text-sub:      #6e6d67;
  --fs-accent:        #a6e22e;
  --fs-accent-hover:  #c2f060;
  --fs-accent-light:  rgba(166,226,46,.15);
  --fs-actbar-bg:     #1e1f1a;
  --fs-actbar-icon:   #90918b;
  --fs-actbar-active: #f8f8f2;
  --fs-sidebar-bg:    #2d2e27;
  --fs-tab-bg:        #3b3c35;
  --fs-tab-active-bg: #272822;
  --fs-tab-text:      #90918b;
  --fs-tab-active-text:#f8f8f2;
  --fs-tab-border:    #2d2e27;
  --fs-editor-bg:     #272822;
  --fs-status-bg:     #75715e;
  --fs-status-text:   #f8f8f2;
  --fs-titlebar-bg:   #1e1f1a;
  --fs-titlebar-text: #f8f8f2;
  --fs-bottom-bg:     #272822;
  --fs-ctx-bg:        #3b3c35;
  --fs-ctx-border:    #75715e;
}

[data-theme="dracula"] {
  --fs-bg:            #282a36;
  --fs-surface:       #21222c;
  --fs-surface2:      #343746;
  --fs-surface3:      #44475a;
  --fs-border:        #44475a;
  --fs-border2:       #6272a4;
  --fs-text:          #f8f8f2;
  --fs-text-dim:      #6272a4;
  --fs-text-sub:      #4d5166;
  --fs-accent:        #bd93f9;
  --fs-accent-hover:  #caa9fb;
  --fs-accent-light:  rgba(189,147,249,.15);
  --fs-actbar-bg:     #21222c;
  --fs-actbar-icon:   #6272a4;
  --fs-actbar-active: #f8f8f2;
  --fs-sidebar-bg:    #21222c;
  --fs-tab-bg:        #343746;
  --fs-tab-active-bg: #282a36;
  --fs-tab-text:      #6272a4;
  --fs-tab-active-text:#f8f8f2;
  --fs-tab-border:    #21222c;
  --fs-editor-bg:     #282a36;
  --fs-status-bg:     #bd93f9;
  --fs-status-text:   #282a36;
  --fs-titlebar-bg:   #21222c;
  --fs-titlebar-text: #f8f8f2;
  --fs-bottom-bg:     #21222c;
  --fs-ctx-bg:        #343746;
  --fs-ctx-border:    #44475a;
}

[data-theme="tokyo-night"] {
  --fs-bg:            #1a1b26;
  --fs-surface:       #16161e;
  --fs-surface2:      #24283b;
  --fs-surface3:      #2f3549;
  --fs-border:        #292e42;
  --fs-border2:       #3b4261;
  --fs-text:          #a9b1d6;
  --fs-text-dim:      #565f89;
  --fs-text-sub:      #414868;
  --fs-accent:        #7aa2f7;
  --fs-accent-hover:  #9ab8fb;
  --fs-accent-light:  rgba(122,162,247,.15);
  --fs-actbar-bg:     #16161e;
  --fs-actbar-icon:   #565f89;
  --fs-actbar-active: #c0caf5;
  --fs-sidebar-bg:    #16161e;
  --fs-tab-bg:        #24283b;
  --fs-tab-active-bg: #1a1b26;
  --fs-tab-text:      #565f89;
  --fs-tab-active-text:#c0caf5;
  --fs-tab-border:    #16161e;
  --fs-editor-bg:     #1a1b26;
  --fs-status-bg:     #7aa2f7;
  --fs-status-text:   #1a1b26;
  --fs-titlebar-bg:   #16161e;
  --fs-titlebar-text: #a9b1d6;
  --fs-bottom-bg:     #16161e;
  --fs-ctx-bg:        #24283b;
  --fs-ctx-border:    #292e42;
}

[data-theme="catppuccin"] {
  --fs-bg:            #1e1e2e;
  --fs-surface:       #181825;
  --fs-surface2:      #313244;
  --fs-surface3:      #45475a;
  --fs-border:        #313244;
  --fs-border2:       #45475a;
  --fs-text:          #cdd6f4;
  --fs-text-dim:      #6c7086;
  --fs-text-sub:      #45475a;
  --fs-accent:        #cba6f7;
  --fs-accent-hover:  #d6bafc;
  --fs-accent-light:  rgba(203,166,247,.15);
  --fs-actbar-bg:     #181825;
  --fs-actbar-icon:   #6c7086;
  --fs-actbar-active: #cdd6f4;
  --fs-sidebar-bg:    #181825;
  --fs-tab-bg:        #313244;
  --fs-tab-active-bg: #1e1e2e;
  --fs-tab-text:      #6c7086;
  --fs-tab-active-text:#cdd6f4;
  --fs-tab-border:    #181825;
  --fs-editor-bg:     #1e1e2e;
  --fs-status-bg:     #cba6f7;
  --fs-status-text:   #1e1e2e;
  --fs-titlebar-bg:   #181825;
  --fs-titlebar-text: #cdd6f4;
  --fs-bottom-bg:     #181825;
  --fs-ctx-bg:        #313244;
  --fs-ctx-border:    #45475a;
}

[data-theme="github-dark"] {
  --fs-bg:            #0d1117;
  --fs-surface:       #161b22;
  --fs-surface2:      #21262d;
  --fs-surface3:      #30363d;
  --fs-border:        #21262d;
  --fs-border2:       #30363d;
  --fs-text:          #e6edf3;
  --fs-text-dim:      #7d8590;
  --fs-text-sub:      #484f58;
  --fs-accent:        #2f81f7;
  --fs-accent-hover:  #58a6ff;
  --fs-accent-light:  rgba(47,129,247,.15);
  --fs-actbar-bg:     #010409;
  --fs-actbar-icon:   #7d8590;
  --fs-actbar-active: #e6edf3;
  --fs-sidebar-bg:    #161b22;
  --fs-tab-bg:        #21262d;
  --fs-tab-active-bg: #0d1117;
  --fs-tab-text:      #7d8590;
  --fs-tab-active-text:#e6edf3;
  --fs-tab-border:    #161b22;
  --fs-editor-bg:     #0d1117;
  --fs-status-bg:     #2f81f7;
  --fs-status-text:   #ffffff;
  --fs-titlebar-bg:   #010409;
  --fs-titlebar-text: #e6edf3;
  --fs-bottom-bg:     #010409;
  --fs-ctx-bg:        #21262d;
  --fs-ctx-border:    #30363d;
}

/* ── Shell Layout ─────────────────────────────────────────────────────────── */
.fs-shell {
  display: flex;
  flex-direction: column;
  height: 100vh;
  background: var(--fs-bg);
  color: var(--fs-text);
  overflow: hidden;
  user-select: none;
}

/* ── Title Bar ────────────────────────────────────────────────────────────── */
.fs-titlebar {
  height: 38px;
  background: var(--fs-titlebar-bg);
  color: var(--fs-titlebar-text);
  display: flex;
  align-items: center;
  flex-shrink: 0;
  border-bottom: 1px solid var(--fs-border);
  position: relative;
  z-index: 100;
}
.fs-titlebar-left {
  display: flex;
  align-items: center;
  padding-left: 8px;
  gap: 4px;
  flex: 0 0 auto;
}
.fs-logo {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--fs-accent);
  border-radius: var(--fs-radius);
  transition: background .15s;
}
.fs-logo:hover { background: var(--fs-btn-ghost-hover); }
.fs-menu-bar { display: flex; align-items: center; }
.fs-menu-btn {
  padding: 4px 10px;
  font-size: 12px;
  color: var(--fs-titlebar-text);
  border-radius: var(--fs-radius);
  transition: background .15s;
  opacity: .85;
}
.fs-menu-btn:hover { background: var(--fs-btn-ghost-hover); opacity: 1; }
.fs-titlebar-center {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}
.fs-title-palette {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--fs-surface2);
  border: 1px solid var(--fs-border2);
  border-radius: var(--fs-radius);
  padding: 5px 12px;
  color: var(--fs-text-dim);
  font-size: 12px;
  transition: all .15s;
  min-width: 240px;
  max-width: 400px;
  cursor: text;
}
.fs-title-palette:hover {
  background: var(--fs-surface3);
  border-color: var(--fs-accent);
  color: var(--fs-text);
}
.fs-title-palette #fs-title-project { flex: 1; text-align: center; }
.fs-title-kbd {
  font-size: 10px;
  padding: 2px 5px;
  background: var(--fs-surface3);
  border-radius: 3px;
  border: 1px solid var(--fs-border2);
  opacity: .7;
}
.fs-titlebar-right {
  display: flex;
  align-items: center;
  gap: 2px;
  padding-right: 8px;
  flex: 0 0 auto;
}
.fs-tb-btn {
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  color: var(--fs-titlebar-text);
  border-radius: var(--fs-radius);
  transition: background .15s;
  opacity: .7;
}
.fs-tb-btn:hover { background: var(--fs-btn-ghost-hover); opacity: 1; }

/* ── Work Area ────────────────────────────────────────────────────────────── */
.fs-workarea {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* ── Activity Bar ─────────────────────────────────────────────────────────── */
.fs-actbar {
  width: 48px;
  background: var(--fs-actbar-bg);
  border-right: 1px solid var(--fs-border);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  flex-shrink: 0;
  z-index: 10;
}
.fs-actbar-top, .fs-actbar-bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 4px 0;
  gap: 2px;
}
.fs-act-btn {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  color: var(--fs-actbar-icon);
  border-radius: var(--fs-radius);
  transition: color .15s, background .15s;
  position: relative;
}
.fs-act-btn:hover { color: var(--fs-text); }
.fs-act-btn.active {
  color: var(--fs-actbar-active);
  border-left: 2px solid var(--fs-accent);
  border-radius: 0;
  margin-left: 0;
  padding-left: 2px;
}

/* ── Sidebar ──────────────────────────────────────────────────────────────── */
.fs-sidebar {
  width: 280px;
  background: var(--fs-sidebar-bg);
  border-right: 1px solid var(--fs-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
  flex-shrink: 0;
  transition: width .15s;
}
.fs-sidebar.hidden { width: 0; border-right: none; }
.fs-sidebar-resize {
  position: absolute;
  right: 0; top: 0; bottom: 0;
  width: 4px;
  cursor: col-resize;
  z-index: 20;
  transition: background .15s;
}
.fs-sidebar-resize:hover, .fs-sidebar-resize.dragging { background: var(--fs-accent); }

/* ── Panels ───────────────────────────────────────────────────────────────── */
.fs-panel {
  display: none;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}
.fs-panel.active { display: flex; }
.fs-panel-header {
  height: 35px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px 0 16px;
  flex-shrink: 0;
  border-bottom: 1px solid var(--fs-border);
}
.fs-panel-title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--fs-text-dim);
}
.fs-panel-actions { display: flex; gap: 2px; }
.fs-panel-search {
  margin: 8px 12px;
  padding: 5px 8px;
  background: var(--fs-input-bg);
  border: 1px solid var(--fs-input-border);
  border-radius: var(--fs-radius);
  color: var(--fs-text);
  font-size: 12px;
  outline: none;
  width: calc(100% - 24px);
}
.fs-panel-search:focus { border-color: var(--fs-accent); }

/* ── Icon Buttons ─────────────────────────────────────────────────────────── */
.fs-icon-btn {
  width: 22px; height: 22px;
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--fs-text-dim);
  border-radius: var(--fs-radius);
  transition: color .12s, background .12s;
}
.fs-icon-btn:hover { color: var(--fs-text); background: var(--fs-btn-ghost-hover); }

/* ── Explorer ─────────────────────────────────────────────────────────────── */
.fs-explorer-content {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
}

/* Project switcher */
.fs-project-switcher {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 12px 4px;
  font-size: 11px;
  color: var(--fs-text-dim);
  background: var(--fs-surface2);
  border-bottom: 1px solid var(--fs-border);
}
.fs-project-name-btn {
  font-size: 12px;
  font-weight: 600;
  color: var(--fs-text);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 5px;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  background: none;
  border: none;
  padding: 0;
}
.fs-project-name-btn:hover { color: var(--fs-accent); }
.fs-project-actions { display: flex; gap: 2px; }

/* File tree */
.fs-tree { padding: 4px 0; }
.fs-tree-item {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  cursor: pointer;
  border-radius: 0;
  font-size: 13px;
  color: var(--fs-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  position: relative;
  transition: background .1s;
}
.fs-tree-item:hover { background: var(--fs-btn-ghost-hover); }
.fs-tree-item.selected { background: var(--fs-accent-light); color: var(--fs-text); }
.fs-tree-item.active { background: rgba(255,255,255,.1); }
.fs-tree-item.active::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: var(--fs-accent);
}
.fs-tree-arrow {
  flex-shrink: 0;
  width: 16px; height: 16px;
  display: flex; align-items: center; justify-content: center;
  color: var(--fs-text-dim);
  transition: transform .15s;
}
.fs-tree-arrow.open { transform: rotate(90deg); }
.fs-tree-arrow.leaf { visibility: hidden; }
.fs-tree-icon { flex-shrink: 0; width: 16px; height: 16px; }
.fs-tree-name { flex: 1; overflow: hidden; text-overflow: ellipsis; }
.fs-tree-rename-input {
  flex: 1;
  background: var(--fs-input-bg);
  border: 1px solid var(--fs-accent);
  border-radius: 2px;
  color: var(--fs-text);
  font-size: 13px;
  padding: 1px 4px;
  outline: none;
}
.fs-tree-children { display: none; }
.fs-tree-children.open { display: block; }

/* Tree indentation */
.fs-tree-item[data-depth="1"] { padding-left: 24px; }
.fs-tree-item[data-depth="2"] { padding-left: 40px; }
.fs-tree-item[data-depth="3"] { padding-left: 56px; }
.fs-tree-item[data-depth="4"] { padding-left: 72px; }
.fs-tree-item[data-depth="5"] { padding-left: 88px; }

/* Empty state */
.fs-explorer-empty {
  padding: 24px 16px;
  text-align: center;
  color: var(--fs-text-dim);
  font-size: 12px;
  line-height: 1.7;
}
.fs-explorer-empty p { margin: 0 0 12px; }
.fs-btn-primary {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--fs-btn-bg);
  color: #fff;
  border-radius: var(--fs-radius);
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 500;
  transition: background .15s;
  border: none; cursor: pointer;
}
.fs-btn-primary:hover { background: var(--fs-btn-hover); }
.fs-btn-ghost {
  display: inline-flex; align-items: center; gap: 6px;
  background: transparent;
  color: var(--fs-text-dim);
  border-radius: var(--fs-radius);
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 500;
  border: 1px solid var(--fs-border2);
  cursor: pointer;
  transition: all .15s;
}
.fs-btn-ghost:hover { background: var(--fs-btn-ghost-hover); color: var(--fs-text); }
.fs-sm-btn {
  font-size: 11px;
  padding: 3px 8px;
  background: var(--fs-btn-bg);
  color: #fff;
  border-radius: var(--fs-radius);
  transition: background .15s;
  border: none; cursor: pointer;
}
.fs-sm-btn:hover { background: var(--fs-btn-hover); }
.fs-sm-btn.ghost {
  background: transparent;
  color: var(--fs-text-dim);
  border: 1px solid var(--fs-border2);
}
.fs-sm-btn.ghost:hover { background: var(--fs-btn-ghost-hover); color: var(--fs-text); }
.fs-sm-btn.danger {
  background: transparent;
  color: var(--fs-danger);
  border: 1px solid var(--fs-danger);
}
.fs-sm-btn.danger:hover { background: rgba(241,76,76,.1); }

/* ── Search Panel ─────────────────────────────────────────────────────────── */
.fs-search-box { padding: 8px 12px; border-bottom: 1px solid var(--fs-border); }
.fs-search-input-wrap {
  display: flex;
  align-items: center;
  background: var(--fs-input-bg);
  border: 1px solid var(--fs-input-border);
  border-radius: var(--fs-radius);
  margin-bottom: 6px;
  transition: border-color .15s;
}
.fs-search-input-wrap:focus-within { border-color: var(--fs-accent); }
.fs-search-input-wrap input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  padding: 5px 8px;
  color: var(--fs-text);
  font-size: 12px;
}
.fs-search-opts { display: flex; gap: 2px; padding-right: 4px; }
.fs-search-opt-btn {
  padding: 2px 5px;
  font-size: 11px;
  font-weight: 600;
  color: var(--fs-text-dim);
  border-radius: 2px;
  transition: all .12s;
  background: none; border: none; cursor: pointer;
}
.fs-search-opt-btn:hover, .fs-search-opt-btn[data-active="true"] {
  background: var(--fs-accent-light);
  color: var(--fs-accent);
}
.fs-search-results { flex: 1; overflow-y: auto; padding: 4px 0; }
.fs-search-file-group { margin: 4px 0; }
.fs-search-file-header {
  display: flex; align-items: center; gap: 6px;
  padding: 4px 12px;
  font-size: 11px;
  font-weight: 600;
  color: var(--fs-text-dim);
  cursor: pointer;
  background: var(--fs-surface2);
}
.fs-search-match {
  padding: 3px 12px 3px 24px;
  font-size: 12px;
  font-family: 'JetBrains Mono', monospace;
  color: var(--fs-text);
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: background .1s;
}
.fs-search-match:hover { background: var(--fs-btn-ghost-hover); }
.fs-search-match mark {
  background: rgba(255,200,0,.3);
  color: inherit;
  border-radius: 2px;
}
.fs-search-line-num {
  color: var(--fs-text-sub);
  margin-right: 8px;
  font-size: 11px;
}
.fs-search-empty {
  padding: 20px 16px;
  text-align: center;
  color: var(--fs-text-dim);
  font-size: 12px;
}

/* ── Extensions Panel ─────────────────────────────────────────────────────── */
.fs-ext-list { flex: 1; overflow-y: auto; padding: 8px 0; }
.fs-ext-section-title {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--fs-text-sub);
  padding: 6px 16px 4px;
  text-transform: uppercase;
}
.fs-ext-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 12px;
  cursor: pointer;
  border-radius: 0;
  transition: background .1s;
}
.fs-ext-item:hover { background: var(--fs-btn-ghost-hover); }
.fs-ext-icon {
  width: 32px; height: 32px;
  border-radius: var(--fs-radius);
  background: var(--fs-accent-light);
  display: flex; align-items: center; justify-content: center;
  color: var(--fs-accent);
  flex-shrink: 0;
}
.fs-ext-info { flex: 1; min-width: 0; }
.fs-ext-name { font-size: 12px; font-weight: 600; color: var(--fs-text); }
.fs-ext-desc { font-size: 11px; color: var(--fs-text-dim); margin-top: 1px; line-height: 1.4; }
.fs-ext-toggle {
  flex-shrink: 0;
  width: 30px; height: 16px;
  background: var(--fs-surface3);
  border-radius: 8px;
  position: relative;
  transition: background .2s;
  cursor: pointer;
  border: none;
}
.fs-ext-toggle.on { background: var(--fs-accent); }
.fs-ext-toggle::after {
  content: '';
  position: absolute;
  left: 2px; top: 2px;
  width: 12px; height: 12px;
  background: #fff;
  border-radius: 50%;
  transition: transform .2s;
}
.fs-ext-toggle.on::after { transform: translateX(14px); }

/* ── AI Panel ─────────────────────────────────────────────────────────────── */
.fs-ai-panel { display: flex; flex-direction: column; height: 100%; }
.fs-ai-provider-bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 6px 12px;
  background: var(--fs-surface2);
  border-bottom: 1px solid var(--fs-border);
  flex-shrink: 0;
}
.fs-ai-provider-label { font-size: 11px; color: var(--fs-text-dim); }
.fs-ai-configure-btn {
  font-size: 11px; padding: 3px 8px;
  background: var(--fs-btn-bg); color: #fff;
  border-radius: var(--fs-radius); border: none; cursor: pointer;
}
.fs-ai-configure-btn:hover { background: var(--fs-btn-hover); }
.fs-ai-actions {
  display: flex; flex-wrap: wrap; gap: 4px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--fs-border);
  flex-shrink: 0;
}
.fs-ai-action-btn {
  font-size: 11px; padding: 3px 8px;
  background: var(--fs-surface2);
  color: var(--fs-text-dim);
  border-radius: var(--fs-radius);
  border: 1px solid var(--fs-border2);
  cursor: pointer;
  transition: all .15s;
}
.fs-ai-action-btn:hover { background: var(--fs-accent-light); color: var(--fs-accent); border-color: var(--fs-accent); }
.fs-ai-messages {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.fs-ai-msg { font-size: 12px; line-height: 1.6; }
.fs-ai-msg-user {
  background: var(--fs-accent-light);
  border-radius: var(--fs-radius);
  padding: 8px 10px;
  color: var(--fs-text);
  border-left: 2px solid var(--fs-accent);
}
.fs-ai-msg-ai {
  background: var(--fs-surface2);
  border-radius: var(--fs-radius);
  padding: 8px 10px;
  color: var(--fs-text);
}
.fs-ai-msg-ai pre {
  background: var(--fs-surface3);
  border-radius: 3px;
  padding: 8px;
  overflow-x: auto;
  font-size: 11px;
  margin: 6px 0;
}
.fs-ai-msg-ai code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  background: var(--fs-surface3);
  padding: 1px 4px;
  border-radius: 3px;
}
.fs-ai-msg-actions {
  display: flex; gap: 4px; margin-top: 6px;
}
.fs-ai-msg-btn {
  font-size: 10px; padding: 2px 6px;
  background: var(--fs-surface3);
  color: var(--fs-text-dim);
  border-radius: 3px;
  border: 1px solid var(--fs-border2);
  cursor: pointer;
  transition: all .12s;
}
.fs-ai-msg-btn:hover { color: var(--fs-text); background: var(--fs-surface); }
.fs-ai-input-area {
  padding: 8px 12px;
  border-top: 1px solid var(--fs-border);
  flex-shrink: 0;
}
.fs-ai-context-row { margin-bottom: 6px; }
.fs-ai-context-sel {
  width: 100%;
  background: var(--fs-input-bg);
  border: 1px solid var(--fs-input-border);
  border-radius: var(--fs-radius);
  color: var(--fs-text);
  padding: 4px 6px;
  font-size: 11px;
  outline: none;
  appearance: none;
  cursor: pointer;
}
.fs-ai-textarea-wrap { position: relative; }
.fs-ai-textarea-wrap textarea {
  width: 100%;
  background: var(--fs-input-bg);
  border: 1px solid var(--fs-input-border);
  border-radius: var(--fs-radius);
  color: var(--fs-text);
  padding: 7px 36px 7px 8px;
  font-size: 12px;
  resize: none;
  outline: none;
  line-height: 1.5;
  transition: border-color .15s;
}
.fs-ai-textarea-wrap textarea:focus { border-color: var(--fs-accent); }
.fs-ai-send-btn {
  position: absolute; right: 6px; bottom: 6px;
  width: 26px; height: 26px;
  background: var(--fs-btn-bg);
  color: #fff;
  border-radius: var(--fs-radius);
  display: flex; align-items: center; justify-content: center;
  border: none; cursor: pointer;
  transition: background .15s;
}
.fs-ai-send-btn:hover { background: var(--fs-btn-hover); }
.fs-ai-thinking {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 10px;
  background: var(--fs-surface2);
  border-radius: var(--fs-radius);
  color: var(--fs-text-dim);
  font-size: 12px;
}

/* AI Config Modal */
.fs-ai-config-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.6);
  z-index: 1000;
  display: flex; align-items: center; justify-content: center;
}
.fs-ai-config-modal {
  background: var(--fs-surface);
  border: 1px solid var(--fs-border2);
  border-radius: var(--fs-radius-lg);
  width: 480px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--fs-shadow);
}
.fs-ai-config-body { overflow-y: auto; padding: 16px; flex: 1; }
.fs-config-row { margin-bottom: 14px; }
.fs-config-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--fs-text-dim);
  margin-bottom: 4px;
}
.fs-config-input {
  width: 100%;
  background: var(--fs-input-bg);
  border: 1px solid var(--fs-input-border);
  border-radius: var(--fs-radius);
  color: var(--fs-text);
  padding: 6px 10px;
  font-size: 12px;
  outline: none;
  transition: border-color .15s;
}
.fs-config-input:focus { border-color: var(--fs-accent); }
.fs-config-select {
  width: 100%;
  background: var(--fs-input-bg);
  border: 1px solid var(--fs-input-border);
  border-radius: var(--fs-radius);
  color: var(--fs-text);
  padding: 6px 10px;
  font-size: 12px;
  outline: none;
  appearance: none;
  cursor: pointer;
}
.fs-config-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--fs-border);
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

/* ── Settings Panel ───────────────────────────────────────────────────────── */
.fs-settings-content { flex: 1; overflow-y: auto; padding: 0; }
.fs-settings-section { border-bottom: 1px solid var(--fs-border); }
.fs-settings-section-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--fs-text-sub);
  padding: 10px 16px 6px;
  text-transform: uppercase;
}
.fs-settings-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 6px 16px;
}
.fs-settings-item-label {
  font-size: 12px;
  color: var(--fs-text);
  flex: 1;
}
.fs-settings-item-sub {
  font-size: 11px;
  color: var(--fs-text-dim);
  display: block;
}
.fs-settings-control { flex-shrink: 0; }
.fs-settings-select {
  background: var(--fs-input-bg);
  border: 1px solid var(--fs-input-border);
  border-radius: var(--fs-radius);
  color: var(--fs-text);
  padding: 3px 6px;
  font-size: 11px;
  outline: none;
  cursor: pointer;
  appearance: none;
  min-width: 80px;
}
.fs-settings-input {
  background: var(--fs-input-bg);
  border: 1px solid var(--fs-input-border);
  border-radius: var(--fs-radius);
  color: var(--fs-text);
  padding: 3px 6px;
  font-size: 11px;
  outline: none;
  width: 60px;
  text-align: right;
}
.fs-settings-input:focus, .fs-settings-select:focus { border-color: var(--fs-accent); }
.fs-settings-toggle {
  width: 30px; height: 16px;
  background: var(--fs-surface3);
  border-radius: 8px;
  position: relative;
  transition: background .2s;
  cursor: pointer;
  border: none;
}
.fs-settings-toggle.on { background: var(--fs-accent); }
.fs-settings-toggle::after {
  content: '';
  position: absolute;
  left: 2px; top: 2px;
  width: 12px; height: 12px;
  background: #fff;
  border-radius: 50%;
  transition: transform .2s;
}
.fs-settings-toggle.on::after { transform: translateX(14px); }
.fs-settings-footer {
  padding: 12px 16px;
  display: flex;
  gap: 8px;
}

/* ── Editor Container ─────────────────────────────────────────────────────── */
.fs-editor-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

/* ── Tab Bar ──────────────────────────────────────────────────────────────── */
.fs-tabbar {
  height: 35px;
  background: var(--fs-tab-bg);
  border-bottom: 1px solid var(--fs-border);
  display: flex;
  align-items: stretch;
  flex-shrink: 0;
  overflow: hidden;
}
.fs-tabs-scroll {
  flex: 1;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
}
.fs-tabs-scroll::-webkit-scrollbar { display: none; }
.fs-tabs { display: flex; height: 100%; align-items: stretch; }
.fs-tab {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 8px 0 12px;
  min-width: 80px;
  max-width: 180px;
  cursor: pointer;
  font-size: 12px;
  color: var(--fs-tab-text);
  background: var(--fs-tab-bg);
  border-right: 1px solid var(--fs-tab-border);
  position: relative;
  flex-shrink: 0;
  transition: color .12s, background .12s;
  user-select: none;
  white-space: nowrap;
  overflow: hidden;
}
.fs-tab:hover { background: var(--fs-surface2); color: var(--fs-text); }
.fs-tab.active {
  background: var(--fs-tab-active-bg);
  color: var(--fs-tab-active-text);
  border-top: 1px solid var(--fs-accent);
}
.fs-tab.pinned { min-width: 40px; }
.fs-tab-icon { flex-shrink: 0; width: 14px; height: 14px; }
.fs-tab-name { overflow: hidden; text-overflow: ellipsis; flex: 1; }
.fs-tab-dirty {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--fs-text-dim);
  flex-shrink: 0;
}
.fs-tab.dirty .fs-tab-dirty { background: #e8a87c; }
.fs-tab-close {
  width: 18px; height: 18px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 3px;
  color: var(--fs-text-dim);
  flex-shrink: 0;
  transition: all .12s;
  opacity: 0;
}
.fs-tab:hover .fs-tab-close,
.fs-tab.active .fs-tab-close { opacity: 1; }
.fs-tab-close:hover { background: rgba(255,255,255,.1); color: var(--fs-text); }
.fs-tabbar-actions {
  display: flex;
  align-items: center;
  padding: 0 4px;
  gap: 2px;
  flex-shrink: 0;
  border-left: 1px solid var(--fs-border);
}

/* ── Workspace (editor + preview) ─────────────────────────────────────────── */
.fs-workspace {
  flex: 1;
  display: flex;
  overflow: hidden;
  min-height: 0;
}
.fs-editor-pane {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}
.fs-breadcrumb {
  height: 22px;
  background: var(--fs-editor-bg);
  border-bottom: 1px solid var(--fs-border);
  display: flex;
  align-items: center;
  padding: 0 12px;
  font-size: 11px;
  color: var(--fs-text-dim);
  gap: 4px;
  flex-shrink: 0;
  white-space: nowrap;
  overflow: hidden;
}
.fs-breadcrumb-sep { opacity: .5; }
.fs-editor-wrap {
  flex: 1;
  position: relative;
  overflow: hidden;
}
#fs-monaco-container { position: absolute; inset: 0; }

/* Loading state */
.fs-editor-loading {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  flex-direction: column; gap: 12px;
  background: var(--fs-editor-bg);
  color: var(--fs-text-dim);
  font-size: 13px;
  z-index: 50;
}
.fs-editor-loading.hidden { display: none; }
.fs-spinner {
  width: 24px; height: 24px;
  border: 2px solid var(--fs-border2);
  border-top-color: var(--fs-accent);
  border-radius: 50%;
  animation: fs-spin .6s linear infinite;
}
@keyframes fs-spin { to { transform: rotate(360deg); } }

/* Welcome screen */
.fs-welcome {
  position: absolute; inset: 0;
  display: flex; align-items: flex-start; justify-content: center;
  background: var(--fs-editor-bg);
  z-index: 40;
  overflow-y: auto;
}
.fs-welcome.hidden { display: none; }
.fs-welcome-inner {
  text-align: center;
  padding: 48px 32px;
  max-width: 500px;
  width: 100%;
}
.fs-welcome-logo {
  display: inline-flex;
  width: 72px; height: 72px;
  border-radius: 16px;
  background: var(--fs-accent-light);
  align-items: center; justify-content: center;
  color: var(--fs-accent);
  margin-bottom: 20px;
}
.fs-welcome-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--fs-text);
  margin-bottom: 8px;
}
.fs-welcome-sub {
  font-size: 14px;
  color: var(--fs-text-dim);
  margin-bottom: 28px;
}
.fs-welcome-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.fs-welcome-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 20px;
  border-radius: var(--fs-radius);
  font-size: 13px;
  font-weight: 500;
  transition: all .15s;
  background: var(--fs-surface2);
  color: var(--fs-text-dim);
  border: 1px solid var(--fs-border2);
  cursor: pointer;
}
.fs-welcome-btn:hover { background: var(--fs-surface3); color: var(--fs-text); }
.fs-welcome-btn.primary {
  background: var(--fs-btn-bg);
  color: #fff;
  border-color: transparent;
}
.fs-welcome-btn.primary:hover { background: var(--fs-btn-hover); }
.fs-welcome-recent {
  margin-bottom: 24px;
  text-align: left;
}
.fs-welcome-recent h3 {
  font-size: 11px;
  font-weight: 600;
  color: var(--fs-text-sub);
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 8px;
}
.fs-welcome-recent-item {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 8px;
  border-radius: var(--fs-radius);
  cursor: pointer;
  transition: background .12s;
  color: var(--fs-text);
  font-size: 13px;
}
.fs-welcome-recent-item:hover { background: var(--fs-btn-ghost-hover); }
.fs-welcome-shortcuts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px 16px;
  width: 100%;
  max-width: 460px;
  margin: 24px auto 0;
}
.fs-shortcut-hint {
  font-size: 11px;
  color: var(--fs-text-dim);
  display: flex; align-items: center; gap: 6px;
}
kbd {
  display: inline-block;
  padding: 2px 6px;
  background: var(--fs-surface2);
  border: 1px solid var(--fs-border2);
  border-radius: 3px;
  font-size: 10px;
  font-family: 'JetBrains Mono', monospace;
  color: var(--fs-text-dim);
}

/* ── Preview Pane ─────────────────────────────────────────────────────────── */
.fs-preview-resize {
  width: 4px;
  background: var(--fs-border);
  cursor: col-resize;
  flex-shrink: 0;
  transition: background .15s;
}
.fs-preview-resize:hover, .fs-preview-resize.dragging { background: var(--fs-accent); }
.fs-preview-pane {
  display: flex;
  flex-direction: column;
  width: 45%;
  min-width: 200px;
  background: var(--fs-preview-bg);
  overflow: hidden;
}
.fs-preview-toolbar {
  height: 35px;
  background: var(--fs-surface);
  border-bottom: 1px solid var(--fs-border);
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 8px;
  flex-shrink: 0;
}
.fs-preview-devices { display: flex; gap: 2px; }
.fs-device-btn {
  width: 26px; height: 26px;
  display: flex; align-items: center; justify-content: center;
  color: var(--fs-text-dim);
  border-radius: var(--fs-radius);
  transition: all .12s;
}
.fs-device-btn:hover, .fs-device-btn.active {
  background: var(--fs-accent-light);
  color: var(--fs-accent);
}
.fs-preview-dims {
  font-size: 11px;
  color: var(--fs-text-sub);
  padding: 0 6px;
  font-family: 'JetBrains Mono', monospace;
}
.fs-preview-controls {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: auto;
}
.fs-preview-zoom-sel {
  background: var(--fs-surface2);
  border: 1px solid var(--fs-border);
  border-radius: var(--fs-radius);
  color: var(--fs-text);
  padding: 2px 4px;
  font-size: 11px;
  outline: none;
  cursor: pointer;
}
.fs-preview-frame-wrap {
  flex: 1;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--fs-surface2);
  position: relative;
}
#fs-preview-iframe {
  border: none;
  background: #fff;
  width: 100%;
  height: 100%;
  transition: width .2s, height .2s;
}
.fs-preview-link-bar {
  padding: 6px 10px;
  background: var(--fs-surface);
  border-top: 1px solid var(--fs-border);
  font-size: 11px;
  color: var(--fs-text-dim);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  flex-wrap: wrap;
}

/* ── Bottom Panel ─────────────────────────────────────────────────────────── */
.fs-bottom-panel {
  background: var(--fs-bottom-bg);
  border-top: 1px solid var(--fs-border);
  display: flex;
  flex-direction: column;
  height: 200px;
  flex-shrink: 0;
  overflow: hidden;
}
.fs-bottom-panel.hidden { display: none; }
.fs-bottom-resize {
  height: 4px;
  cursor: row-resize;
  flex-shrink: 0;
  transition: background .15s;
}
.fs-bottom-resize:hover, .fs-bottom-resize.dragging { background: var(--fs-accent); }
.fs-bottom-tabs {
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--fs-border);
  flex-shrink: 0;
  height: 30px;
  padding: 0 8px;
  gap: 2px;
}
.fs-bottom-tab {
  padding: 4px 12px;
  font-size: 11px;
  color: var(--fs-text-dim);
  cursor: pointer;
  border-radius: var(--fs-radius) var(--fs-radius) 0 0;
  transition: all .12s;
  border: 1px solid transparent;
  border-bottom: none;
  background: none;
}
.fs-bottom-tab:hover { color: var(--fs-text); background: var(--fs-btn-ghost-hover); }
.fs-bottom-tab.active {
  color: var(--fs-text);
  background: var(--fs-bottom-bg);
  border-color: var(--fs-border);
}
.fs-bottom-tab-spacer { flex: 1; }
.fs-bottom-content {
  flex: 1;
  overflow: hidden;
  position: relative;
}
.fs-btab-pane {
  display: none;
  height: 100%;
  overflow-y: auto;
  padding: 6px 12px;
}
.fs-btab-pane.active { display: block; }
.fs-console-output { font-family: 'JetBrains Mono', monospace; font-size: 12px; }
.fs-console-empty { color: var(--fs-text-sub); font-size: 12px; padding: 8px 0; }
.fs-console-line { padding: 2px 0; border-bottom: 1px solid var(--fs-border); }
.fs-console-line.error { color: var(--fs-danger); }
.fs-console-line.warn  { color: var(--fs-warning); }
.fs-console-line.info  { color: var(--fs-accent); }
.fs-problems-list { font-size: 12px; }
.fs-problem-item {
  display: flex; align-items: flex-start; gap: 8px;
  padding: 5px 4px;
  border-bottom: 1px solid var(--fs-border);
  cursor: pointer;
}
.fs-problem-item:hover { background: var(--fs-btn-ghost-hover); }

/* ── Status Bar ───────────────────────────────────────────────────────────── */
.fs-statusbar {
  height: 22px;
  background: var(--fs-status-bg);
  color: var(--fs-status-text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 8px;
  font-size: 11px;
  flex-shrink: 0;
  z-index: 10;
}
.fs-status-left, .fs-status-right {
  display: flex; align-items: center; gap: 4px;
}
.fs-status-item {
  padding: 1px 6px;
  border-radius: 3px;
  white-space: nowrap;
  background: none;
  border: none;
  color: var(--fs-status-text);
  cursor: default;
  font: inherit;
  font-size: 11px;
  transition: background .12s;
}
button.fs-status-item { cursor: pointer; }
button.fs-status-item:hover { background: rgba(255,255,255,.15); }
.fs-status-sep { opacity: .4; }
.fs-status-branch { display: flex; align-items: center; gap: 4px; }

/* ── Command Palette ──────────────────────────────────────────────────────── */
.fs-palette-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 900;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 15vh;
}
.fs-palette {
  background: var(--fs-surface);
  border: 1px solid var(--fs-border2);
  border-radius: var(--fs-radius-lg);
  width: 560px;
  max-width: 90vw;
  box-shadow: var(--fs-shadow);
  overflow: hidden;
}
.fs-palette-input-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--fs-border);
  color: var(--fs-text-dim);
}
#fs-palette-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--fs-text);
  font-size: 14px;
}
.fs-palette-esc {
  font-size: 10px;
  padding: 2px 6px;
  background: var(--fs-surface2);
  border: 1px solid var(--fs-border2);
  border-radius: 3px;
  color: var(--fs-text-dim);
}
.fs-palette-results {
  max-height: 320px;
  overflow-y: auto;
}
.fs-palette-group-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--fs-text-sub);
  padding: 8px 16px 4px;
  text-transform: uppercase;
}
.fs-palette-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 16px;
  cursor: pointer;
  transition: background .1s;
}
.fs-palette-item:hover, .fs-palette-item.selected {
  background: var(--fs-accent-light);
}
.fs-palette-item-icon { color: var(--fs-text-dim); flex-shrink: 0; }
.fs-palette-item-text { flex: 1; }
.fs-palette-item-label { font-size: 13px; color: var(--fs-text); }
.fs-palette-item-sub { font-size: 11px; color: var(--fs-text-dim); }
.fs-palette-item-kbd { font-size: 10px; color: var(--fs-text-sub); flex-shrink: 0; }

/* ── Modal ────────────────────────────────────────────────────────────────── */
.fs-modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.55);
  z-index: 800;
  display: flex;
  align-items: center;
  justify-content: center;
}
.fs-modal {
  background: var(--fs-surface);
  border: 1px solid var(--fs-border2);
  border-radius: var(--fs-radius-lg);
  width: 440px;
  max-width: 90vw;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--fs-shadow);
  overflow: hidden;
}
.fs-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--fs-border);
}
.fs-modal-title { font-size: 14px; font-weight: 600; color: var(--fs-text); }
.fs-modal-close {
  width: 24px; height: 24px;
  display: flex; align-items: center; justify-content: center;
  color: var(--fs-text-dim);
  border-radius: var(--fs-radius);
  transition: all .12s;
  cursor: pointer;
}
.fs-modal-close:hover { background: var(--fs-btn-ghost-hover); color: var(--fs-text); }
.fs-modal-body { padding: 16px; overflow-y: auto; flex: 1; }
.fs-modal-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--fs-border);
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}
.fs-modal-input {
  width: 100%;
  background: var(--fs-input-bg);
  border: 1px solid var(--fs-input-border);
  border-radius: var(--fs-radius);
  color: var(--fs-text);
  padding: 7px 10px;
  font-size: 13px;
  outline: none;
  margin-bottom: 12px;
  transition: border-color .15s;
}
.fs-modal-input:focus { border-color: var(--fs-accent); }
.fs-modal-label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  color: var(--fs-text-dim);
  margin-bottom: 6px;
}
.fs-modal-text {
  font-size: 13px;
  color: var(--fs-text);
  line-height: 1.6;
  margin-bottom: 12px;
}
.fs-modal-file-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 4px;
}
.fs-file-type-btn {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 12px;
  border-radius: var(--fs-radius);
  border: 2px solid var(--fs-border2);
  background: var(--fs-surface2);
  cursor: pointer;
  font-size: 12px;
  color: var(--fs-text-dim);
  transition: all .15s;
}
.fs-file-type-btn:hover { border-color: var(--fs-accent); color: var(--fs-text); }
.fs-file-type-btn.selected {
  border-color: var(--fs-accent);
  background: var(--fs-accent-light);
  color: var(--fs-accent);
}
.fs-link-checkbox-list { display: flex; flex-direction: column; gap: 6px; }
.fs-link-checkbox {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 8px;
  border-radius: var(--fs-radius);
  cursor: pointer;
  font-size: 12px;
  color: var(--fs-text);
}
.fs-link-checkbox:hover { background: var(--fs-btn-ghost-hover); }
.fs-link-checkbox input { accent-color: var(--fs-accent); }

/* ── Context Menu ─────────────────────────────────────────────────────────── */
.fs-ctx-menu {
  position: fixed;
  background: var(--fs-ctx-bg);
  border: 1px solid var(--fs-ctx-border);
  border-radius: var(--fs-radius);
  box-shadow: var(--fs-shadow);
  z-index: 700;
  min-width: 180px;
  padding: 4px 0;
  font-size: 12px;
  overflow: hidden;
}
.fs-ctx-item {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 14px;
  cursor: pointer;
  color: var(--fs-text);
  transition: background .1s;
  white-space: nowrap;
}
.fs-ctx-item:hover { background: var(--fs-accent-light); }
.fs-ctx-item.danger { color: var(--fs-danger); }
.fs-ctx-item.danger:hover { background: rgba(241,76,76,.1); }
.fs-ctx-item svg { color: var(--fs-text-dim); flex-shrink: 0; }
.fs-ctx-item.danger svg { color: var(--fs-danger); }
.fs-ctx-sep {
  height: 1px;
  background: var(--fs-border);
  margin: 4px 0;
}
.fs-ctx-kbd {
  margin-left: auto;
  font-size: 10px;
  color: var(--fs-text-sub);
  font-family: 'JetBrains Mono', monospace;
}

/* ── Toast Notifications ──────────────────────────────────────────────────── */
.fs-toasts {
  position: fixed;
  bottom: 36px;
  right: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 999;
  pointer-events: none;
}
.fs-toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: var(--fs-surface);
  border: 1px solid var(--fs-border2);
  border-radius: var(--fs-radius-lg);
  box-shadow: var(--fs-shadow-sm);
  font-size: 12px;
  color: var(--fs-text);
  max-width: 300px;
  pointer-events: all;
  animation: fs-toast-in .2s ease;
  border-left: 3px solid var(--fs-accent);
}
.fs-toast.success { border-left-color: var(--fs-success); }
.fs-toast.error   { border-left-color: var(--fs-danger); }
.fs-toast.warning { border-left-color: var(--fs-warning); }
@keyframes fs-toast-in {
  from { opacity: 0; transform: translateX(20px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ── Scrollbar Styling ────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--fs-scroll-track); }
::-webkit-scrollbar-thumb {
  background: var(--fs-scroll-thumb);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover { background: var(--fs-border2); }
* { scrollbar-width: thin; scrollbar-color: var(--fs-scroll-thumb) transparent; }

/* ── File type color dots ─────────────────────────────────────────────────── */
.fs-lang-html   { color: #e44d26; }
.fs-lang-css    { color: #264de4; }
.fs-lang-js     { color: #f0db4f; }
.fs-lang-ts     { color: #007acc; }
.fs-lang-json   { color: #a6e22e; }
.fs-lang-md     { color: #7d7d7d; }
.fs-lang-svg    { color: #ff9900; }
.fs-lang-folder { color: var(--fs-accent); }

/* ── Responsive / Layout ──────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .fs-sidebar { width: 100%; position: absolute; z-index: 50; }
  .fs-menu-bar { display: none; }
  .fs-title-palette { min-width: 160px; }
}

/* ── Animations ───────────────────────────────────────────────────────────── */
.fs-panel, .fs-palette-item, .fs-tree-item, .fs-ctx-item {
  animation: none;
}
.fs-panel.active { animation: fs-panel-in .1s ease; }
@keyframes fs-panel-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ── Extension Modal Styles ───────────────────────────────────────────────── */
.fs-ext-modal-content { padding: 4px; }
.fs-ext-run-result {
  margin-top: 12px;
  background: var(--fs-surface2);
  border: 1px solid var(--fs-border);
  border-radius: var(--fs-radius);
  padding: 10px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--fs-text);
  max-height: 300px;
  overflow: auto;
}
.fs-lor-options { display: flex; gap: 8px; align-items: center; margin-bottom: 12px; flex-wrap: wrap; }
.fs-lor-label { font-size: 12px; color: var(--fs-text-dim); }
.fs-lor-input {
  background: var(--fs-input-bg);
  border: 1px solid var(--fs-input-border);
  border-radius: var(--fs-radius);
  color: var(--fs-text);
  padding: 4px 8px;
  font-size: 12px;
  width: 70px;
  outline: none;
}
.fs-regex-row { display: flex; gap: 8px; margin-bottom: 10px; align-items: center; }
.fs-regex-input {
  flex: 1;
  background: var(--fs-input-bg);
  border: 1px solid var(--fs-input-border);
  border-radius: var(--fs-radius);
  color: var(--fs-text);
  padding: 5px 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  outline: none;
}
.fs-regex-input:focus { border-color: var(--fs-accent); }
.fs-regex-flags {
  font-size: 12px; padding: 5px 8px;
  background: var(--fs-input-bg);
  border: 1px solid var(--fs-input-border);
  border-radius: var(--fs-radius);
  color: var(--fs-text); outline: none; width: 70px;
}
.fs-regex-result {
  font-size: 12px;
  background: var(--fs-surface2);
  border-radius: var(--fs-radius);
  padding: 8px;
  margin-top: 8px;
  line-height: 1.6;
}
.fs-regex-match { background: rgba(0,122,204,.3); border-radius: 2px; }
.fs-regex-error { color: var(--fs-danger); font-size: 12px; }

/* ── Project list in switcher dropdown ───────────────────────────────────── */
.fs-project-list {
  padding: 4px 0;
}
.fs-project-list-item {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 14px;
  cursor: pointer;
  font-size: 12px;
  color: var(--fs-text);
  transition: background .1s;
}
.fs-project-list-item:hover { background: var(--fs-btn-ghost-hover); }
.fs-project-list-item.active { color: var(--fs-accent); }
.fs-project-list-sep { height: 1px; background: var(--fs-border); margin: 4px 0; }

/* ── Quick open file picker ───────────────────────────────────────────────── */
.fs-quick-open-item {
  display: flex; align-items: center; gap: 10px;
  padding: 7px 16px; cursor: pointer;
  font-size: 12px; color: var(--fs-text);
  transition: background .1s;
}
.fs-quick-open-item:hover, .fs-quick-open-item.selected { background: var(--fs-accent-light); }
.fs-quick-open-path { font-size: 10px; color: var(--fs-text-dim); margin-left: auto; }

/* ── CSS Generator Tool Styles ────────────────────────────────────────────── */
.fs-gen-layout { display: flex; flex-direction: column; gap: 2px; }
.fs-gen-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 0;
}
.fs-gen-label {
  font-size: 11px;
  color: var(--fs-text-dim);
  width: 90px;
  flex-shrink: 0;
}
.fs-gen-val {
  font-size: 11px;
  color: var(--fs-text-dim);
  width: 40px;
  text-align: right;
  font-family: 'JetBrains Mono', monospace;
}
.fs-gen-select {
  background: var(--fs-input-bg);
  border: 1px solid var(--fs-input-border);
  border-radius: var(--fs-radius);
  color: var(--fs-text);
  padding: 4px 8px;
  font-size: 12px;
  outline: none;
  cursor: pointer;
}
.fs-gen-select:focus { border-color: var(--fs-accent); }
input[type="range"] {
  accent-color: var(--fs-accent);
  height: 4px;
  cursor: pointer;
}

/* ── Welcome screen — templates & actions ─────────────────────────────────── */
#fs-welcome-templates { margin-top: 20px; text-align: left; width: 100%; max-width: 460px; }
#fs-welcome-templates h3 {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--fs-text-sub);
  margin-bottom: 10px;
  padding: 0 2px;
}
.fs-welcome-tpl-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.fs-welcome-tpl-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--fs-radius);
  border: 1px solid var(--fs-border2);
  background: var(--fs-surface2);
  cursor: pointer;
  transition: all .15s;
}
.fs-welcome-tpl-card:hover {
  border-color: var(--fs-accent);
  background: var(--fs-accent-light);
}
.fs-welcome-tpl-icon { font-size: 22px; flex-shrink: 0; }
.fs-welcome-tpl-name { font-size: 12px; font-weight: 600; color: var(--fs-text); }
.fs-welcome-tpl-desc { font-size: 10px; color: var(--fs-text-dim); margin-top: 2px; }

#fs-welcome-actions { margin-top: 16px; width: 100%; max-width: 460px; }
.fs-welcome-action-row { display: flex; gap: 8px; }
.fs-welcome-action-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  font-size: 12px;
  border-radius: var(--fs-radius);
  border: 1px solid var(--fs-border2);
  background: var(--fs-surface2);
  color: var(--fs-text-dim);
  cursor: pointer;
  transition: all .15s;
}
.fs-welcome-action-btn:hover {
  border-color: var(--fs-accent);
  color: var(--fs-accent);
  background: var(--fs-accent-light);
}

/* ── Theme grid — color swatch next to label ──────────────────────────────── */
.fs-theme-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  padding: 0 16px 8px;
}
.fs-theme-option {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: var(--fs-radius);
  border: 2px solid var(--fs-border2);
  background: var(--fs-surface2);
  cursor: pointer;
  font-size: 11px;
  color: var(--fs-text-dim);
  transition: all .15s;
  white-space: nowrap;
}
.fs-theme-option:hover {
  border-color: var(--fs-accent);
  color: var(--fs-text);
}
.fs-theme-option.active {
  border-color: var(--fs-accent);
  background: var(--fs-accent-light);
  color: var(--fs-accent);
  font-weight: 600;
}
.fs-theme-option::before {
  content: '';
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}
[data-theme-swatch="dark"]       .fs-theme-option::before, .fs-theme-option[data-theme="dark"]::before       { background: #1e1e1e; border: 1px solid #555; }
[data-theme-swatch="light"]      .fs-theme-option::before, .fs-theme-option[data-theme="light"]::before      { background: #fff; border: 1px solid #ccc; }
[data-theme-swatch="hc"]         .fs-theme-option::before, .fs-theme-option[data-theme="hc"]::before         { background: #000; border: 1px solid #fff; }
[data-theme-swatch="monokai"]    .fs-theme-option::before, .fs-theme-option[data-theme="monokai"]::before    { background: #272822; border: 1px solid #75715e; }
[data-theme-swatch="dracula"]    .fs-theme-option::before, .fs-theme-option[data-theme="dracula"]::before    { background: #282a36; border: 1px solid #bd93f9; }
[data-theme-swatch="tokyo-night"].fs-theme-option::before, .fs-theme-option[data-theme="tokyo-night"]::before{ background: #1a1b2e; border: 1px solid #7aa2f7; }
[data-theme-swatch="catppuccin"] .fs-theme-option::before, .fs-theme-option[data-theme="catppuccin"]::before { background: #1e1e2e; border: 1px solid #cba6f7; }
[data-theme-swatch="github-dark"].fs-theme-option::before, .fs-theme-option[data-theme="github-dark"]::before{ background: #0d1117; border: 1px solid #388bfd; }

/* ── Improved modal — wider for generators ────────────────────────────────── */
.fs-modal.fs-modal-wide { width: 560px; }

/* ── Accessibility check results ──────────────────────────────────────────── */
.fs-a11y-pass { color: var(--fs-success); }
.fs-a11y-warn { color: var(--fs-warning); }
.fs-a11y-error { color: var(--fs-danger); }

/* ── Explorer: ZIP import/export buttons ──────────────────────────────────── */
.fs-panel-header-row {
  display: flex;
  align-items: center;
  gap: 2px;
}

/* ── Improved Welcome recent items ────────────────────────────────────────── */
.fs-welcome-recent h3,
#fs-welcome-templates h3 {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--fs-text-sub);
  margin-bottom: 8px;
  padding: 0 2px;
}
.fs-welcome-recent { margin-top: 20px; width: 100%; max-width: 460px; }

/* ── Scrollbar refinement ─────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-corner { background: transparent; }

/* ── Reduced motion support ───────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

/* ═══════════════════════════════════════════════════════════════════════════
   TITLEBAR — Tools + AI buttons
═══════════════════════════════════════════════════════════════════════════ */
.fs-tb-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .04em;
  margin-left: 3px;
}
.fs-tools-trigger-btn { gap: 4px; }
.fs-tools-trigger-btn.active,
.fs-tb-btn.active {
  color: var(--fs-accent);
  background: var(--fs-accent-light);
}

/* ═══════════════════════════════════════════════════════════════════════════
   FLOATING AI PANEL
═══════════════════════════════════════════════════════════════════════════ */
.fs-float-ai {
  position: fixed;
  right: 20px;
  bottom: 44px;
  width: 380px;
  height: 560px;
  background: var(--fs-surface);
  border: 1px solid var(--fs-border2);
  border-radius: 10px;
  box-shadow: 0 8px 32px rgba(0,0,0,.4), 0 2px 8px rgba(0,0,0,.2);
  z-index: 600;
  display: none;
  flex-direction: column;
  overflow: hidden;
  transition: height .2s ease, width .2s ease, box-shadow .15s;
  resize: none;
  user-select: none;
}
.fs-float-ai.fs-float-visible {
  display: flex;
  animation: fs-float-in .18s ease;
}
@keyframes fs-float-in {
  from { opacity: 0; transform: translateY(12px) scale(.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.fs-float-ai.fs-float-minimized { height: 44px; }
.fs-float-ai.fs-float-minimized .fs-float-ai-body { display: none; }
.fs-float-ai[data-size="wide"]  { width: 520px; }
.fs-float-ai[data-size="tall"]  { height: 720px; }

/* Float AI Header */
.fs-float-ai-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 10px 0 14px;
  height: 44px;
  flex-shrink: 0;
  background: var(--fs-surface2);
  border-bottom: 1px solid var(--fs-border);
  border-radius: 10px 10px 0 0;
  cursor: grab;
  user-select: none;
}
.fs-float-ai-header:active { cursor: grabbing; }
.fs-float-ai-title {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  font-weight: 600;
  color: var(--fs-text);
}
.fs-float-ai-provider-chip {
  font-size: 10px;
  font-weight: 500;
  color: var(--fs-accent);
  background: var(--fs-accent-light);
  border-radius: 10px;
  padding: 1px 7px;
}
.fs-float-ai-ctrl {
  display: flex;
  align-items: center;
  gap: 2px;
}
.fs-float-ai-ctrl-btn {
  width: 24px;
  height: 24px;
  border-radius: 5px;
  border: none;
  background: transparent;
  color: var(--fs-text-dim);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .12s, color .12s;
}
.fs-float-ai-ctrl-btn:hover { background: var(--fs-btn-ghost-hover); color: var(--fs-text); }
.fs-float-ai-ctrl-btn--close:hover { background: rgba(241,76,76,.15); color: var(--fs-danger); }

/* Float AI Body */
.fs-float-ai-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  overflow: hidden;
  user-select: text;
}
.fs-float-ai-body .fs-ai-context-row {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 10px 0;
}

/* Resize handle (bottom-right corner) */
.fs-float-ai-resize-handle {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 16px;
  height: 16px;
  cursor: nwse-resize;
  background: linear-gradient(135deg, transparent 50%, var(--fs-border2) 50%);
  border-radius: 0 0 10px 0;
  opacity: .5;
}
.fs-float-ai-resize-handle:hover { opacity: 1; }

/* ═══════════════════════════════════════════════════════════════════════════
   TOOLS OVERLAY — Full-screen panel with accordions
═══════════════════════════════════════════════════════════════════════════ */
.fs-tools-panel {
  position: fixed !important;
  inset: 0;
  z-index: 550;
  background: var(--fs-bg);
  flex-direction: column;
  animation: fs-tools-in .15s ease;
}
@keyframes fs-tools-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Tools header */
.fs-tools-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  height: 52px;
  flex-shrink: 0;
  background: var(--fs-surface);
  border-bottom: 1px solid var(--fs-border);
  gap: 12px;
}
.fs-tools-header-left {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--fs-text);
}
.fs-tools-header-title {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -.01em;
}
.fs-tools-header-sub {
  font-size: 11px;
  color: var(--fs-text-dim);
  background: var(--fs-surface2);
  border: 1px solid var(--fs-border);
  border-radius: 10px;
  padding: 1px 8px;
}
.fs-tools-header-right {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}
.fs-tools-action-btn {
  font-size: 11px;
  padding: 4px 10px;
  background: var(--fs-surface2);
  color: var(--fs-text-dim);
  border: 1px solid var(--fs-border2);
  border-radius: var(--fs-radius);
  cursor: pointer;
  transition: all .12s;
}
.fs-tools-action-btn:hover { background: var(--fs-accent-light); color: var(--fs-accent); border-color: var(--fs-accent); }
.fs-tools-close-btn {
  width: 28px; height: 28px;
  border-radius: 6px;
  border: none;
  background: transparent;
  color: var(--fs-text-dim);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .12s, color .12s;
}
.fs-tools-close-btn:hover { background: rgba(241,76,76,.12); color: var(--fs-danger); }

/* Tools body — scrollable */
.fs-tools-body {
  flex: 1;
  overflow-y: auto;
  padding: 0;
}

/* ── Accordion ──────────────────────────────────────────────────────────── */
.fs-accordion {
  border-bottom: 1px solid var(--fs-border);
}
.fs-accordion-hd {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  cursor: pointer;
  background: var(--fs-surface2);
  transition: background .12s;
  user-select: none;
  position: sticky;
  top: 0;
  z-index: 10;
}
.fs-accordion-hd:hover { background: var(--fs-btn-ghost-hover); }
.fs-accordion-hd-left {
  display: flex;
  align-items: center;
  gap: 10px;
}
.fs-accordion-hd-right {
  display: flex;
  align-items: center;
  gap: 8px;
}
.fs-accordion-arrow {
  color: var(--fs-text-dim);
  flex-shrink: 0;
  transition: transform .2s;
}
.fs-accordion.open .fs-accordion-arrow { transform: rotate(90deg); }
.fs-accordion-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--fs-text);
}
.fs-accordion-desc {
  font-size: 11px;
  color: var(--fs-text-dim);
}
.fs-accordion-kbd {
  font-size: 10px;
  color: var(--fs-text-sub);
  font-family: 'JetBrains Mono', monospace;
  background: var(--fs-surface3);
  border: 1px solid var(--fs-border2);
  border-radius: 4px;
  padding: 2px 6px;
}

/* Accordion body — collapsed by default, open when .open */
.fs-accordion-bd {
  display: none;
  padding: 20px;
  background: var(--fs-bg);
}
.fs-accordion.open .fs-accordion-bd { display: block; }

/* Make ft-tab-panels visible in accordion mode */
.fs-accordion-bd .ft-tab-panel {
  display: block !important;
}

/* ── Remap FT color vars → Studio dark theme inside the overlay ────────── */
.fs-tools-body {
  --color-background: var(--fs-bg);
  --color-surface:    var(--fs-surface2);
  --color-border:     var(--fs-border2);
  --color-text:       var(--fs-text);
  --color-text-muted: var(--fs-text-dim);
  --color-primary:    var(--fs-accent);
}

/* ── Tool grid — responsive 3-col in overlay ──────────────────────────── */
.fs-accordion-bd .ft-tool-grid {
  grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
  gap: 16px;
  padding: 4px 2px 8px;
}

/* ── Tool card — elevated, with subtle gradient + left accent ─────────── */
.fs-accordion-bd .ft-tool-card {
  background: linear-gradient(135deg, var(--fs-surface2) 0%, var(--fs-surface3) 100%);
  border: 1px solid var(--fs-border2);
  border-left: 3px solid var(--fs-border2);
  border-radius: 10px;
  padding: 18px 18px 14px;
  gap: 12px;
  box-shadow: 0 1px 4px rgba(0,0,0,.18);
  transition: border-color .15s, box-shadow .15s, transform .12s;
  position: relative;
  overflow: hidden;
}
.fs-accordion-bd .ft-tool-card::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 60px; height: 60px;
  border-radius: 0 10px 0 60px;
  opacity: .04;
  background: var(--fs-accent);
  pointer-events: none;
}
.fs-accordion-bd .ft-tool-card:hover {
  border-color: var(--fs-accent);
  border-left-color: var(--fs-accent);
  box-shadow: 0 4px 16px rgba(0,0,0,.24), 0 0 0 1px var(--fs-accent-light);
  transform: translateY(-1px);
}

/* Category-specific left border colors */
#ft-tab-html .ft-tool-card { border-left-color: #e34c26; }
#ft-tab-html .ft-tool-card:hover { border-left-color: #e34c26; border-color: #e34c26; box-shadow: 0 4px 16px rgba(227,76,38,.15), 0 0 0 1px rgba(227,76,38,.15); }
#ft-tab-css  .ft-tool-card { border-left-color: #4f87d4; }
#ft-tab-css  .ft-tool-card:hover { border-left-color: #4f87d4; border-color: #4f87d4; box-shadow: 0 4px 16px rgba(79,135,212,.15), 0 0 0 1px rgba(79,135,212,.15); }
#ft-tab-js   .ft-tool-card { border-left-color: #d4b84f; }
#ft-tab-js   .ft-tool-card:hover { border-left-color: #d4b84f; border-color: #d4b84f; box-shadow: 0 4px 16px rgba(212,184,79,.12), 0 0 0 1px rgba(212,184,79,.12); }
#ft-tab-diff .ft-tool-card { border-left-color: #4fad8f; }
#ft-tab-diff .ft-tool-card:hover { border-left-color: #4fad8f; border-color: #4fad8f; }

/* ── Card header ── */
.fs-accordion-bd .ft-tool-card-head {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--fs-border);
  margin-bottom: 2px;
}
.fs-accordion-bd .ft-tool-card-title {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--fs-text);
}
.fs-accordion-bd .ft-tool-card-desc {
  font-size: 11.5px;
  color: var(--fs-text-dim);
  line-height: 1.4;
}

/* ── Textarea styling ── */
.fs-accordion-bd .ft-textarea {
  min-height: 110px;
  background: var(--fs-bg);
  border-color: var(--fs-border2);
  color: var(--fs-text);
  border-radius: 6px;
  font-size: 11.5px;
  padding: 9px 11px;
  line-height: 1.6;
  transition: border-color .15s, box-shadow .15s;
}
.fs-accordion-bd .ft-textarea:focus {
  border-color: var(--fs-accent);
  box-shadow: 0 0 0 2px var(--fs-accent-light);
}
.fs-accordion-bd .ft-textarea-out {
  background: color-mix(in srgb, var(--fs-bg) 60%, var(--fs-surface3));
  color: var(--fs-text-sub);
  border-style: dashed;
}

/* ── Action row ── */
.fs-accordion-bd .ft-tool-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 2px 0;
}

/* ── Buttons override ── */
.fs-accordion-bd .ft-btn {
  font-size: 11.5px;
  font-weight: 600;
  padding: 5px 13px;
  border-radius: 6px;
  background: var(--fs-surface3);
  border-color: var(--fs-border2);
  color: var(--fs-text-dim);
  transition: all .13s;
  letter-spacing: .01em;
}
.fs-accordion-bd .ft-btn:hover {
  background: var(--fs-surface2);
  border-color: var(--fs-text-sub);
  color: var(--fs-text);
}
.fs-accordion-bd .ft-btn-primary {
  background: var(--fs-accent);
  border-color: var(--fs-accent);
  color: #fff;
  box-shadow: 0 1px 4px rgba(0,0,0,.2);
}
.fs-accordion-bd .ft-btn-primary:hover {
  background: var(--fs-accent);
  filter: brightness(1.1);
  color: #fff;
}
.fs-accordion-bd .ft-btn-danger {
  color: #f87171;
  border-color: rgba(248,113,113,.3);
  background: transparent;
}
.fs-accordion-bd .ft-btn-danger:hover {
  background: rgba(248,113,113,.1);
  border-color: #f87171;
  color: #f87171;
}
.fs-accordion-bd .ft-btn.ft-copied {
  border-color: #4ade80;
  color: #4ade80;
  background: rgba(74,222,128,.08);
}

/* ── Input / select ── */
.fs-accordion-bd .ft-input-sm,
.fs-accordion-bd .ft-select {
  background: var(--fs-bg);
  border: 1px solid var(--fs-border2);
  color: var(--fs-text);
  border-radius: 5px;
  font-size: 11.5px;
  padding: 4px 8px;
  outline: none;
}
.fs-accordion-bd .ft-input-sm:focus,
.fs-accordion-bd .ft-select:focus { border-color: var(--fs-accent); }

/* ── Gen row (Table Generator row) ── */
.fs-accordion-bd .ft-gen-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 2px 0 4px;
}
.fs-accordion-bd .ft-gen-label {
  font-size: 11.5px;
  color: var(--fs-text-dim);
  font-weight: 500;
}

/* ── Console output ── */
.fs-accordion-bd .ft-console-output {
  background: #0e1117;
  border: 1px solid var(--fs-border2);
  border-radius: 6px;
  padding: 10px 12px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px;
  min-height: 100px;
  max-height: 260px;
  overflow-y: auto;
  color: #d4d4d4;
}
.fs-accordion-bd .ft-console-empty {
  color: var(--fs-text-dim);
  font-style: italic;
  font-size: 11px;
}

/* ── Diff layout ── */
.fs-accordion-bd .ft-diff-editors {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  height: 44vh;
}
.fs-accordion-bd .ft-diff-col { display: flex; flex-direction: column; gap: 6px; }
.fs-accordion-bd .ft-diff-col-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--fs-text-dim);
  letter-spacing: .04em;
  text-transform: uppercase;
}
.fs-accordion-bd .ft-diff-ta { height: 100%; min-height: unset; resize: none; }
.fs-accordion-bd .ft-diff-toolbar {
  display: flex;
  gap: 8px;
  padding: 10px 0 4px;
}
.fs-accordion-bd .ft-diff-result {
  min-height: 120px;
  max-height: 35vh;
  overflow-y: auto;
  background: var(--fs-bg);
  border: 1px solid var(--fs-border2);
  border-radius: 6px;
  padding: 10px 12px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px;
  line-height: 1.6;
}
.fs-accordion-bd .ft-diff-empty {
  color: var(--fs-text-dim);
  font-style: italic;
  font-size: 11px;
}

/* ── Active state — highlight when overlay or float is open ──────────────── */
.fs-act-btn#fs-act-ai-btn.active {
  color: var(--fs-accent);
  background: var(--fs-accent-light);
}
.fs-act-btn#fs-act-tools-btn.active {
  color: var(--fs-accent);
  background: var(--fs-accent-light);
}

/* ══════════════════════════════════════════════════════════════════════════
   SNIPPETS PANEL
══════════════════════════════════════════════════════════════════════════ */
.fs-snip-panel {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ── Toolbar ── */
.fs-snip-toolbar {
  padding: 8px 10px 4px;
  border-bottom: 1px solid var(--fs-border);
  flex-shrink: 0;
}
.fs-snip-search {
  width: 100%;
  background: var(--fs-surface2);
  border: 1px solid var(--fs-border2);
  border-radius: 5px;
  color: var(--fs-text);
  font-size: 12px;
  padding: 5px 10px;
  outline: none;
  margin-bottom: 8px;
}
.fs-snip-search:focus { border-color: var(--fs-accent); }

/* ── Category pills ── */
.fs-snip-cats {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}
.fs-snip-cat {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .4px;
  padding: 3px 10px;
  border-radius: 20px;
  border: 1px solid var(--fs-border2);
  background: transparent;
  color: var(--fs-text-dim);
  cursor: pointer;
  transition: all .15s;
}
.fs-snip-cat:hover { color: var(--fs-text); border-color: var(--fs-text-sub); }
.fs-snip-cat.active {
  background: var(--fs-accent);
  border-color: var(--fs-accent);
  color: #fff;
}

/* ── Snippet list ── */
.fs-snip-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px 8px 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.fs-snip-empty {
  color: var(--fs-text-dim);
  font-size: 12px;
  text-align: center;
  padding: 32px 16px;
}

/* ── Snippet card ── */
.fs-snip-card {
  background: var(--fs-surface2);
  border: 1px solid var(--fs-border);
  border-radius: 7px;
  padding: 9px 11px;
  transition: border-color .15s;
  flex-shrink: 0;
}
.fs-snip-card:hover { border-color: var(--fs-accent); }

.fs-snip-card-hd {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-bottom: 4px;
}
.fs-snip-lang {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: .6px;
  padding: 2px 6px;
  border-radius: 3px;
  flex-shrink: 0;
}
.fs-snip-lang-html { background: #e34c26; color: #fff; }
.fs-snip-lang-css  { background: #264de4; color: #fff; }
.fs-snip-lang-js   { background: #f7df1e; color: #222; }

.fs-snip-name {
  font-size: 12px;
  font-weight: 600;
  color: var(--fs-text);
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.fs-snip-del {
  font-size: 16px;
  line-height: 1;
  color: var(--fs-text-dim);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0 2px;
  flex-shrink: 0;
  border-radius: 3px;
}
.fs-snip-del:hover { color: #f87171; background: rgba(248,113,113,.12); }

.fs-snip-desc {
  font-size: 10.5px;
  color: var(--fs-text-dim);
  margin-bottom: 6px;
}

/* ── Code preview ── */
.fs-snip-preview {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 10px;
  line-height: 1.5;
  color: var(--fs-text-sub);
  background: var(--fs-bg);
  border: 1px solid var(--fs-border);
  border-radius: 4px;
  padding: 6px 8px;
  margin-bottom: 8px;
  overflow: hidden;
  white-space: pre;
  max-height: 90px;
  overflow-y: hidden;
}
.fs-snip-more {
  color: var(--fs-text-dim);
  font-style: italic;
}

/* ── Action buttons ── */
.fs-snip-btns {
  display: flex;
  gap: 5px;
}
.fs-snip-btn-insert,
.fs-snip-btn-copy,
.fs-snip-btn-edit {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 10.5px;
  font-weight: 500;
  padding: 3px 9px;
  border-radius: 4px;
  border: 1px solid var(--fs-border2);
  background: var(--fs-surface3);
  color: var(--fs-text-dim);
  cursor: pointer;
  transition: all .15s;
}
.fs-snip-btn-insert { border-color: var(--fs-accent); color: var(--fs-accent); }
.fs-snip-btn-insert:hover { background: var(--fs-accent); color: #fff; }
.fs-snip-btn-copy:hover { color: var(--fs-text); border-color: var(--fs-text-sub); }
.fs-snip-btn-edit:hover  { color: var(--fs-text); border-color: var(--fs-text-sub); }

/* ── New snippet floating button ── */
.fs-snip-new-btn {
  margin: 8px;
  padding: 7px;
  background: var(--fs-surface2);
  border: 1px dashed var(--fs-border2);
  border-radius: 6px;
  color: var(--fs-text-dim);
  font-size: 11.5px;
  font-weight: 500;
  cursor: pointer;
  width: calc(100% - 16px);
  text-align: center;
  transition: all .15s;
  flex-shrink: 0;
}
.fs-snip-new-btn:hover {
  border-color: var(--fs-accent);
  color: var(--fs-accent);
  background: var(--fs-accent-light);
}

/* ── New/edit form ── */
.fs-snip-form {
  flex-direction: column;
  gap: 7px;
  padding: 10px;
  border-top: 1px solid var(--fs-border);
  flex: 1;
  overflow-y: auto;
}
.fs-snip-form-row {
  display: flex;
  gap: 7px;
}
.fs-snip-form-input {
  width: 100%;
  background: var(--fs-surface2);
  border: 1px solid var(--fs-border2);
  border-radius: 5px;
  color: var(--fs-text);
  font-size: 12px;
  padding: 5px 9px;
  outline: none;
}
.fs-snip-form-input:focus { border-color: var(--fs-accent); }
.fs-snip-form-select {
  background: var(--fs-surface2);
  border: 1px solid var(--fs-border2);
  border-radius: 5px;
  color: var(--fs-text);
  font-size: 12px;
  padding: 5px 8px;
  outline: none;
  flex-shrink: 0;
}
.fs-snip-form-code {
  width: 100%;
  min-height: 140px;
  background: var(--fs-bg);
  border: 1px solid var(--fs-border2);
  border-radius: 5px;
  color: var(--fs-text);
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  line-height: 1.5;
  padding: 7px 9px;
  outline: none;
  resize: vertical;
}
.fs-snip-form-code:focus { border-color: var(--fs-accent); }
.fs-snip-form-btns {
  display: flex;
  gap: 7px;
  align-items: center;
}