* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
}

/* ---- Menu bar ---- */
.menu-bar {
  display: flex;
  background: var(--sz-color-menu, #f0f0f0);
  color: var(--sz-color-menu-text, #000);
  border-bottom: 1px solid var(--sz-color-button-shadow, #999);
  font-size: 12px;
  flex-shrink: 0;
}

.menu-item {
  position: relative;
  padding: 3px 8px;
  cursor: default;
}

.menu-item:hover {
  background: var(--sz-color-highlight, #0078d7);
  color: var(--sz-color-highlight-text, #fff);
}

.menu-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 180px;
  background: var(--sz-color-menu, #f0f0f0);
  color: var(--sz-color-menu-text, #000);
  border: 1px solid var(--sz-color-button-shadow, #999);
  box-shadow: 2px 2px 4px rgba(0,0,0,.25);
  z-index: 1000;
  padding: 2px 0;
}

.menu-item:hover > .menu-dropdown { display: block; }

.menu-entry {
  padding: 3px 24px 3px 8px;
  cursor: default;
  white-space: nowrap;
  position: relative;
}

.menu-entry:hover {
  background: var(--sz-color-highlight, #0078d7);
  color: var(--sz-color-highlight-text, #fff);
}

.menu-entry .shortcut {
  float: right;
  margin-left: 24px;
  opacity: .6;
}

.menu-entry.checkable::before {
  content: '';
  display: inline-block;
  width: 14px;
  margin-left: -4px;
}

.menu-entry.checkable.checked::before {
  content: '\2713';
  margin-right: 2px;
}

.menu-separator {
  height: 1px;
  margin: 2px 4px;
  background: var(--sz-color-button-shadow, #999);
}

.has-submenu::after {
  content: '\25b6';
  position: absolute;
  right: 8px;
  font-size: 9px;
}

.menu-submenu {
  display: none;
  position: absolute;
  left: 100%;
  top: -2px;
  min-width: 180px;
  background: var(--sz-color-menu, #f0f0f0);
  color: var(--sz-color-menu-text, #000);
  border: 1px solid var(--sz-color-button-shadow, #999);
  box-shadow: 2px 2px 4px rgba(0,0,0,.25);
  z-index: 1001;
  padding: 2px 0;
}

.has-submenu:hover > .menu-submenu { display: block; }

/* ---- Toolbar ---- */
.toolbar {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 2px 4px;
  background: var(--sz-color-button-face, #ece9d8);
  border-bottom: 1px solid var(--sz-color-button-shadow, #999);
  font-size: 12px;
  flex-shrink: 0;
}

.tb-btn {
  padding: 2px 8px;
  border: 1px solid var(--sz-color-button-shadow, #999);
  background: var(--sz-color-button-face, #ece9d8);
  color: var(--sz-color-button-text, #000);
  cursor: pointer;
  font-size: 11px;
  white-space: nowrap;
}

.tb-btn:hover:not(:disabled) {
  background: var(--sz-color-button-highlight, #fff);
}

.tb-btn:disabled {
  opacity: .5;
  cursor: default;
}

.tb-sep {
  width: 1px;
  height: 18px;
  background: var(--sz-color-button-shadow, #999);
  margin: 0 2px;
}

.tb-label {
  font-weight: bold;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tb-controls {
  display: flex;
  align-items: center;
  gap: 4px;
}

.tb-controls select {
  font-size: 11px;
  padding: 1px 2px;
}

.tb-controls label {
  font-size: 11px;
  white-space: nowrap;
}

.tb-spacer { flex: 1; }

/* ---- App area ---- */
#app {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: var(--sz-color-window, #fff);
}

/* ---- Test Selector ---- */
#test-selector {
  position: absolute;
  inset: 0;
  overflow-y: auto;
  padding: 8px;
}

.category-header {
  grid-column: 1 / -1;
  font-size: 13px;
  font-weight: bold;
  padding: 8px 4px 4px;
  color: var(--sz-color-window-text, #000);
  border-bottom: 1px solid var(--sz-color-button-shadow, #999);
  margin-top: 4px;
}

.category-header:first-child { margin-top: 0; }

.test-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 6px;
}

.test-card {
  display: flex;
  flex-direction: column;
  padding: 8px;
  background: var(--sz-color-window, #fff);
  color: var(--sz-color-window-text, #000);
  border: 1px solid var(--sz-color-button-shadow, #999);
  cursor: pointer;
  border-radius: 2px;
}

.test-card:hover {
  background: var(--sz-color-highlight, #0078d7);
  color: var(--sz-color-highlight-text, #fff);
}

.test-card-preview {
  height: 24px;
  border: 1px solid var(--sz-color-button-shadow, #999);
  margin-bottom: 4px;
  border-radius: 1px;
  overflow: hidden;
}

.test-card-name {
  font-size: 12px;
  font-weight: bold;
  margin-bottom: 2px;
}

.test-card-desc {
  font-size: 10px;
  opacity: .7;
  line-height: 1.3;
}

/* ---- Test Area ---- */
#test-area {
  position: absolute;
  inset: 0;
  background: #000;
}

#test-canvas, #gl-canvas {
  display: block;
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

#test-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

.overlay-text {
  color: #fff;
  font-size: 48px;
  font-family: monospace;
  text-shadow: 0 0 8px #000, 0 0 16px #000;
  text-align: center;
  padding: 16px;
}

.overlay-fps {
  position: absolute;
  top: 16px;
  right: 16px;
  color: #0f0;
  font-size: 24px;
  font-family: monospace;
  text-shadow: 0 0 6px #000;
  text-align: right;
  line-height: 1.4;
}

.overlay-info {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255,255,255,.6);
  font-size: 13px;
  font-family: sans-serif;
  text-shadow: 0 0 4px #000;
  text-align: center;
  white-space: nowrap;
}

.overlay-marker {
  position: absolute;
  color: #ff0;
  font-size: 14px;
  font-family: monospace;
  text-shadow: 0 0 4px #000;
  pointer-events: none;
}

.webgl-unsupported {
  color: #f44;
  font-size: 18px;
  font-family: sans-serif;
  text-align: center;
  padding: 32px;
}

/* ---- Status Bar ---- */
.status-bar {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 2px 6px;
  background: var(--sz-color-button-face, #ece9d8);
  border-top: 1px solid var(--sz-color-button-shadow, #999);
  font-size: 11px;
  color: var(--sz-color-button-text, #000);
  flex-shrink: 0;
}

.sb-sep {
  width: 1px;
  height: 12px;
  background: var(--sz-color-button-shadow, #999);
}

/* ---- Dialogs ---- */
.dialog-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.4);
  z-index: 2000;
  align-items: center;
  justify-content: center;
}

.dialog-overlay.visible {
  display: flex;
}

.dialog {
  background: var(--sz-color-button-face, #ece9d8);
  color: var(--sz-color-button-text, #000);
  border: 1px solid var(--sz-color-button-shadow, #999);
  box-shadow: 2px 2px 8px rgba(0,0,0,.3);
  min-width: 320px;
  max-width: 500px;
}

.dialog-title {
  padding: 4px 8px;
  font-weight: bold;
  font-size: 12px;
  background: var(--sz-color-active-title, #0a246a);
  color: var(--sz-color-title-text, #fff);
}

.dialog-body {
  padding: 12px;
  font-size: 12px;
  line-height: 1.5;
}

.dialog-body p { margin-bottom: 8px; }
.dialog-body p:last-child { margin-bottom: 0; }

.dialog-buttons {
  display: flex;
  justify-content: flex-end;
  padding: 8px 12px;
  gap: 6px;
}

.dialog-buttons button {
  padding: 3px 20px;
  min-width: 70px;
}

.shortcut-table {
  width: 100%;
  border-collapse: collapse;
}

.shortcut-table td {
  padding: 3px 8px;
  font-size: 12px;
  border-bottom: 1px solid var(--sz-color-button-shadow, #ccc);
}

.shortcut-table kbd {
  background: var(--sz-color-window, #fff);
  border: 1px solid var(--sz-color-button-shadow, #999);
  padding: 1px 5px;
  font-family: monospace;
  font-size: 11px;
  border-radius: 2px;
}

/* ---- Fullscreen ---- */
:fullscreen #test-area,
:-webkit-full-screen #test-area {
  position: fixed;
  inset: 0;
  z-index: 9999;
  width: 100vw;
  height: 100vh;
}

/* ---- Toolbar range controls ---- */
.tb-range {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: 11px;
}

.tb-range input[type=range] {
  width: 80px;
  height: 14px;
}

.tb-range .range-val {
  min-width: 30px;
  text-align: right;
  font-family: monospace;
  font-size: 10px;
}

.tb-range .range-label {
  white-space: nowrap;
}

.tb-range input[type=checkbox] {
  margin: 0;
}

/* ---- Hidden helpers ---- */
.hidden { display: none !important; }