* { box-sizing: border-box; margin: 0; padding: 0; }
body { overflow: hidden; display: flex; flex-direction: column; height: 100vh; }

/* Tab bar */
.tabs { display: flex; padding: 4px 6px 0; }
.tab {
  padding: 4px 14px; cursor: default; border: 1px solid var(--sz-color-button-shadow);
  border-bottom: none; margin-right: 2px; background: var(--sz-color-button-face);
  border-radius: 3px 3px 0 0; user-select: none; position: relative; z-index: 0;
}
.tab.active {
  background: var(--sz-color-window); font-weight: bold; z-index: 2;
  margin-bottom: -1px; padding-bottom: 5px;
}
.tab:hover:not(.active) { background: var(--sz-color-button-light); }

/* Tab content */
.tab-body {
  flex: 1; overflow: hidden; display: none; flex-direction: column;
  border: 1px solid var(--sz-color-button-shadow); margin: 0 6px;
  background: var(--sz-color-window); padding: 10px;
}
.tab-body.active { display: flex; }

/* Bottom button bar */
.button-bar {
  display: flex; justify-content: flex-end; gap: 6px; padding: 8px 10px;
}
.button-bar button {
  min-width: 72px; padding: 3px 12px; font-size: 11px; cursor: default;
}

/* Fieldset-like group boxes */
.group-box {
  border: 1px solid var(--sz-color-button-shadow); padding: 10px 10px 8px;
  margin-bottom: 10px; position: relative;
}
.group-box legend {
  font-size: 11px; padding: 0 4px; color: var(--sz-color-button-text);
}

/* Preview monitor */
.preview-monitor {
  width: 200px; height: 160px; margin: 0 auto 8px;
  background: #607080; border: 2px solid #444; border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: inset 0 0 10px rgba(0,0,0,0.3);
}
.preview-screen {
  width: 172px; height: 130px; background: #3a6ea5;
  border: 1px solid #222; overflow: hidden; position: relative;
}

/* Mini window inside preview */
.preview-window {
  position: absolute; top: 12px; left: 16px; width: 140px; height: 90px;
  background: var(--pv-window, white); border: 1px solid var(--pv-frame, #999);
  box-shadow: 1px 1px 4px rgba(0,0,0,0.3); font-size: 9px;
}
.preview-titlebar {
  height: 18px; display: flex; align-items: center; padding: 0 4px;
  color: white; font-size: 9px; font-weight: bold; overflow: hidden;
}
.preview-titlebar-btns {
  margin-left: auto; display: flex; gap: 1px;
}
.preview-titlebar-btns span {
  display: inline-block; width: 12px; height: 12px;
  background: rgba(255,255,255,0.3); border: 1px solid rgba(255,255,255,0.5);
  text-align: center; line-height: 10px; font-size: 7px; cursor: default;
}
.preview-content {
  padding: 4px; height: calc(100% - 18px); display: flex; flex-direction: column;
}
.preview-menubar {
  height: 14px; border-bottom: 1px solid var(--sz-color-button-shadow); font-size: 8px; padding: 1px 4px;
}
.preview-body {
  flex: 1; display: flex; align-items: center; justify-content: center;
  font-size: 8px; color: var(--sz-color-gray-text);
}
.preview-inactive-bar {
  position: absolute; top: 2px; left: 16px; width: 140px; height: 10px;
  border-radius: 1px; opacity: 0.5;
}
.preview-taskbar {
  position: absolute; bottom: 0; left: 0; right: 0; height: 16px;
  display: flex; align-items: center; padding: 0 2px;
}
.preview-start-btn {
  font-size: 7px; font-weight: bold; color: white; padding: 1px 6px;
  border: none; border-radius: 2px; cursor: default;
}

/* Skin list */
.skin-list-container { flex: 1; overflow: auto; min-height: 80px; }
.skin-list {
  list-style: none; border: 1px solid var(--sz-color-button-shadow);
  background: var(--sz-color-window); padding: 2px; margin: 0;
  max-height: 120px; overflow-y: auto;
}
.skin-list li {
  padding: 3px 6px; cursor: default; user-select: none;
  display: flex; align-items: center; gap: 6px;
}
.skin-list li:hover { background: var(--sz-color-highlight); color: var(--sz-color-highlight-text); }
.skin-list li.selected { background: var(--sz-color-highlight); color: var(--sz-color-highlight-text); }

/* Color swatch strip next to skin names */
.skin-color-swatch {
  display: inline-block; width: 32px; height: 10px; border: 1px solid rgba(0,0,0,0.3);
  border-radius: 1px; flex-shrink: 0;
}

/* Sub-skin dropdown */
.subskin-row { margin-top: 6px; display: none; align-items: center; gap: 6px; }
.subskin-row.visible { display: flex; }
.subskin-row label { white-space: nowrap; }
.subskin-row select { flex: 1; }

/* Background tab */
.bg-list {
  list-style: none; border: 1px solid var(--sz-color-button-shadow);
  background: var(--sz-color-window); padding: 2px; margin: 0;
  max-height: 120px; overflow-y: auto;
}
.bg-list li {
  padding: 3px 6px; cursor: default; user-select: none;
}
.bg-list li:hover { background: var(--sz-color-highlight); color: var(--sz-color-highlight-text); }
.bg-list li.selected { background: var(--sz-color-highlight); color: var(--sz-color-highlight-text); }

.bg-controls { display: flex; align-items: center; gap: 8px; margin-top: 8px; }
.bg-controls label { white-space: nowrap; }
.bg-controls select { min-width: 100px; }

.preview-bg-screen {
  width: 172px; height: 130px; background: #3a6ea5;
  border: 1px solid #222; overflow: hidden; position: relative;
}
.preview-bg-screen img {
  position: absolute; inset: 0; width: 100%; height: 100%;
}

.two-col { display: flex; gap: 12px; flex: 1; min-height: 0; }
.two-col > .col-left { flex: 1; display: flex; flex-direction: column; min-height: 0; }
.two-col > .col-right { display: flex; flex-direction: column; align-items: center; }

/* Themes tab */
.theme-list {
  list-style: none; border: 1px solid var(--sz-color-button-shadow);
  background: var(--sz-color-window); padding: 2px; margin: 0;
  flex: 1; overflow-y: auto;
}
.theme-list li {
  padding: 4px 8px; cursor: default; user-select: none;
  display: flex; align-items: center; gap: 8px;
}
.theme-list li:hover { background: var(--sz-color-highlight); color: var(--sz-color-highlight-text); }
.theme-list li.selected { background: var(--sz-color-highlight); color: var(--sz-color-highlight-text); }
.theme-swatch {
  display: inline-flex; width: 48px; height: 24px; border: 1px solid rgba(0,0,0,0.3);
  border-radius: 2px; flex-shrink: 0; overflow: hidden; flex-direction: column;
}
.theme-swatch-titlebar { height: 8px; }
.theme-swatch-body { flex: 1; display: flex; }
.theme-swatch-window { flex: 1; }
.theme-swatch-face { width: 4px; }
.theme-info { display: flex; flex-direction: column; gap: 1px; }
.theme-info-name { font-weight: bold; font-size: 11px; }
.theme-info-desc { font-size: 9px; color: var(--sz-color-gray-text); }
.theme-list li:hover .theme-info-desc,
.theme-list li.selected .theme-info-desc { color: var(--sz-color-highlight-text); opacity: 0.8; }

/* Pointers tab */
.slider-row {
  display: flex; align-items: center; gap: 8px; padding: 4px 0;
}
.slider-row label { white-space: nowrap; font-size: 11px; }
.slider-row input[type="range"] { flex: 1; }
.slider-value {
  display: inline-block; min-width: 20px; text-align: center;
  font-size: 11px; font-weight: bold;
}
.cursor-preview {
  width: 100%; height: 100px; margin: 0 auto;
}
.cursor-preview-area {
  width: 100%; height: 100%;
  background: var(--sz-color-window);
  border: 1px solid var(--sz-color-button-shadow);
  position: relative; overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}
.cursor-preview-hint {
  font-size: 10px; color: var(--sz-color-gray-text); user-select: none;
}
.cursor-preview-shadow {
  position: absolute; width: 24px; height: 24px;
  pointer-events: none;
  filter: blur(1px) brightness(0) opacity(0.3);
  background-size: contain; background-repeat: no-repeat;
}
.cursor-preview-trail {
  position: absolute; width: 24px; height: 24px;
  pointer-events: none;
  background-size: contain; background-repeat: no-repeat;
}

/* Taskbar tab */
.chk-row { display: block; padding: 3px 0; cursor: default; user-select: none; }
.chk-row input[type="checkbox"] { margin-right: 6px; vertical-align: middle; }

/* Sub-tabs inside Window Mgmt tab */
.subtabs {
  display: flex; flex-wrap: wrap; padding: 0 0 0; margin-bottom: 8px;
  border-bottom: 1px solid var(--sz-color-button-shadow);
}
.subtab {
  padding: 3px 10px; cursor: default; font-size: 10px;
  border: 1px solid var(--sz-color-button-shadow);
  border-bottom: none; margin-right: 1px; margin-bottom: -1px;
  background: var(--sz-color-button-face);
  border-radius: 3px 3px 0 0; user-select: none;
}
.subtab.active {
  background: var(--sz-color-window); font-weight: bold;
  padding-bottom: 4px; z-index: 1; position: relative;
}
.subtab:hover:not(.active) { background: var(--sz-color-button-light); }
.subtab-body {
  display: none; flex-direction: column; flex: 1;
  overflow-y: auto; min-height: 0;
}
.subtab-body.active { display: flex; }

/* Hint text under group boxes */
.hint-text {
  font-size: 9px; color: var(--sz-color-gray-text);
  margin-top: 6px; line-height: 1.4;
}

/* Base layer row */
.base-layer-row {
  display: flex; align-items: center; gap: 6px; flex-wrap: wrap;
}
.base-layer-row input[type="color"] {
  width: 28px; height: 22px; padding: 0; border: 1px solid var(--sz-color-button-shadow); cursor: pointer;
}

/* Desktop tab top row: preview + base layer side by side */
.bg-top-row {
  display: flex; gap: 8px; flex: 0 0 auto;
}
.bg-top-row > .group-box { flex: 1; }
.bg-top-row > .group-box:first-child { flex: 0 0 auto; }

/* Desktop tab content source subtabs */
.bg-subtabs {
  display: flex; flex-wrap: wrap; margin-bottom: 0;
  border-bottom: 1px solid var(--sz-color-button-shadow);
}

/* Source panels */
.source-panel {
  display: none; flex-direction: column; flex: 1; min-height: 0; overflow: auto;
  border: 1px solid var(--sz-color-button-shadow); border-top: none;
  padding: 8px; background: var(--sz-color-window);
}
.source-panel.active { display: flex; }

/* Online thumbnails grid */
.online-thumbnails {
  display: flex; flex-wrap: wrap; gap: 4px; margin-top: 4px;
  max-height: 90px; overflow-y: auto; background: var(--sz-color-window);
  border: 1px solid var(--sz-color-button-shadow); padding: 4px;
}
.online-thumbnails:empty { display: none; }
.online-thumb {
  width: 60px; height: 45px; object-fit: cover; cursor: pointer;
  border: 2px solid transparent; border-radius: 2px;
}
.online-thumb:hover { border-color: var(--sz-color-highlight); }
.online-thumb.selected { border-color: var(--sz-color-highlight); box-shadow: 0 0 4px rgba(49,106,197,0.5); }

/* Pattern preset list */
.pattern-preset-list {
  list-style: none; border: 1px solid var(--sz-color-button-shadow);
  background: var(--sz-color-window); padding: 2px; margin: 2px 0 0;
  max-height: 180px; overflow-y: auto;
}
.pattern-preset-list li {
  padding: 2px 6px; cursor: default; user-select: none; font-size: 10px;
}
.pattern-preset-list li:hover { background: var(--sz-color-highlight); color: var(--sz-color-highlight-text); }
.pattern-preset-list li.selected { background: var(--sz-color-highlight); color: var(--sz-color-highlight-text); }