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

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

/* ---- Menu Bar ---- */
.menu-bar {
  display: flex;
  align-items: center;
  height: 20px;
  background: var(--sz-color-menu);
  border-bottom: 1px solid var(--sz-color-button-shadow);
  padding: 0 2px;
  position: relative;
  flex-shrink: 0;
}

.menu-item {
  padding: 2px 8px;
  cursor: default;
  color: var(--sz-color-menu-text);
  position: relative;
}

.menu-item:hover, .menu-item.open {
  background: var(--sz-color-highlight);
  color: var(--sz-color-highlight-text);
}

.menu-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--sz-color-menu);
  border: 2px outset var(--sz-color-button-face);
  box-shadow: 2px 2px 4px rgba(0,0,0,0.3);
  z-index: 1000;
  min-width: 180px;
  padding: 2px 0;
}

.menu-dropdown.visible { display: block; }

.menu-entry {
  padding: 3px 24px 3px 24px;
  cursor: default;
  white-space: nowrap;
  color: var(--sz-color-menu-text);
  position: relative;
}

.menu-entry:hover {
  background: var(--sz-color-highlight);
  color: var(--sz-color-highlight-text);
}

.menu-entry .shortcut {
  float: right;
  margin-left: 24px;
  opacity: 0.7;
}

.menu-entry.checkbox.checked::before {
  content: '\2713';
  position: absolute;
  left: 8px;
}

.menu-separator {
  height: 1px;
  background: var(--sz-color-button-shadow);
  margin: 3px 4px;
}

/* ---- Submenu ---- */
.menu-submenu {
  display: none;
  position: absolute;
  top: -2px;
  left: 100%;
  background: var(--sz-color-menu);
  border: 2px outset var(--sz-color-button-face);
  box-shadow: 2px 2px 4px rgba(0,0,0,0.3);
  z-index: 1001;
  min-width: 140px;
  padding: 2px 0;
}

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

.submenu-arrow {
  float: right;
  margin-left: 12px;
  font-size: 8px;
}

/* ---- Canvas Area ---- */
.canvas-area {
  flex: 1;
  overflow: hidden;
  position: relative;
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* ---- Status Bar ---- */
.status-bar {
  display: flex;
  align-items: center;
  height: 20px;
  background: var(--sz-color-button-face);
  border-top: 1px solid var(--sz-color-button-shadow);
  padding: 0 4px;
  flex-shrink: 0;
  gap: 2px;
}

.status-section {
  border: 1px solid;
  border-color: var(--sz-color-button-shadow) var(--sz-color-button-highlight) var(--sz-color-button-highlight) var(--sz-color-button-shadow);
  padding: 1px 6px;
  font-size: 11px;
  white-space: nowrap;
  color: var(--sz-color-menu-text);
}

.status-section.flex { flex: 1; }


.dialog-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.25);
  z-index: 2000;
  justify-content: center;
  align-items: center;
}

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

.dialog {
  background: var(--sz-color-button-face);
  border: 2px outset var(--sz-color-button-face);
  box-shadow: 2px 2px 8px rgba(0, 0, 0, 0.4);
  min-width: 280px;
  max-width: 400px;
}

.dialog-title {
  background: linear-gradient(180deg, #0a246a 0%, #3a6ea5 100%);
  background-color: var(--sz-color-active-title);
  color: var(--sz-color-title-text);
  font-size: 11px;
  font-weight: bold;
  padding: 3px 6px;
  user-select: none;
}

.dialog-body {
  padding: 12px 16px;
  font-size: 11px;
  line-height: 1.6;
}

.dialog-buttons {
  display: flex;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px 12px;
}

.dialog-buttons button {
  min-width: 75px;
  height: 23px;
  border: 2px outset var(--sz-color-button-face);
  background: var(--sz-color-button-face);
  font-family: inherit;
  font-size: 11px;
  cursor: pointer;
}

.dialog-buttons button:active {
  border-style: inset;
}