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

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

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

.menu-item {
  position: relative;
  padding: 3px 8px;
  cursor: default;
  color: var(--sz-color-menu-text);
}

.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;
  min-width: 200px;
  background: var(--sz-color-menu);
  border: 1px solid var(--sz-color-button-shadow);
  box-shadow: 2px 2px 4px rgba(0,0,0,0.2);
  z-index: 1000;
  padding: 2px 0;
}

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

.menu-entry {
  padding: 4px 24px 4px 8px;
  cursor: default;
  color: var(--sz-color-menu-text);
  white-space: nowrap;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.menu-entry.disabled {
  color: var(--sz-color-gray-text);
  pointer-events: none;
}

.menu-entry .shortcut {
  margin-left: 24px;
  font-size: 10px;
  opacity: 0.7;
}

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

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

.tb-btn {
  width: 24px;
  height: 22px;
  border: 1px solid transparent;
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: default;
  font-size: 13px;
  line-height: 1;
  color: var(--sz-color-button-text);
  flex-shrink: 0;
  padding: 0;
}

.tb-btn:hover {
  border: 1px outset var(--sz-color-button-highlight);
  background: var(--sz-color-button-face);
}

.tb-btn:active {
  border: 1px inset var(--sz-color-button-shadow);
  background: var(--sz-color-button-highlight);
}

.tb-btn.disabled {
  color: var(--sz-color-gray-text);
  pointer-events: none;
}

.tb-sep {
  width: 2px;
  height: 18px;
  border-left: 1px solid var(--sz-color-button-shadow);
  border-right: 1px solid var(--sz-color-button-highlight);
  margin: 0 3px;
  flex-shrink: 0;
}

/* ---- Image viewport ---- */
.viewport {
  flex: 1;
  overflow: auto;
  position: relative;
  min-height: 0;
  background-color: #c0c0c0;
  background-image:
    linear-gradient(45deg, #aaa 25%, transparent 25%),
    linear-gradient(-45deg, #aaa 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #aaa 75%),
    linear-gradient(-45deg, transparent 75%, #aaa 75%);
  background-size: 16px 16px;
  background-position: 0 0, 0 8px, 8px -8px, -8px 0;
}

.viewport .image-container {
  display: inline-block;
  transform-origin: 0 0;
  line-height: 0;
  min-width: 100%;
  min-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.viewport .image-container.fit {
  width: 100%;
  height: 100%;
}

.viewport .image-container img {
  display: block;
  image-rendering: auto;
  max-width: none;
  max-height: none;
}

.viewport .image-container.fit img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.viewport .empty-message {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  color: var(--sz-color-gray-text);
  font-size: 13px;
  font-style: italic;
  background: var(--sz-color-button-face);
}

/* ---- Status bar ---- */
.status-bar {
  display: flex;
  align-items: center;
  padding: 2px 8px;
  background: var(--sz-color-button-face);
  border-top: 1px solid var(--sz-color-button-shadow);
  font-size: 10px;
  color: var(--sz-color-button-text);
  flex-shrink: 0;
  user-select: none;
  gap: 12px;
  min-height: 22px;
}

.status-bar .status-section {
  white-space: nowrap;
}

.status-spacer { flex: 1; }

/* ---- Dialogs ---- */
.dialog-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.3);
  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-shadow);
  min-width: 300px;
  max-width: 450px;
  box-shadow: 3px 3px 8px rgba(0,0,0,0.3);
}

.dialog-title {
  background: var(--sz-color-highlight);
  color: var(--sz-color-highlight-text);
  padding: 4px 8px;
  font-weight: bold;
  font-size: 11px;
}

.dialog-body {
  padding: 12px;
  font-size: 11px;
}

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

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

.dialog-buttons button {
  min-width: 72px;
  padding: 3px 12px;
  font-size: 11px;
  cursor: default;
}