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

body {
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* ---- 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);
  user-select: none;
  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-entry.radio::before {
  content: '';
  display: inline-block;
  width: 12px;
  margin-right: 4px;
}

.menu-entry.radio.checked::before {
  content: '\2022';
}

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

/* ---- Hex view ---- */
.hex-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--sz-color-window);
  color: var(--sz-color-window-text);
  border-top: 1px solid var(--sz-color-button-shadow);
}

.hex-header {
  display: flex;
  flex-shrink: 0;
  font-family: 'Consolas', 'Lucida Console', 'Courier New', monospace;
  font-size: 13px;
  line-height: 18px;
  background: var(--sz-color-button-face);
  border-bottom: 1px solid var(--sz-color-button-shadow);
  color: var(--sz-color-button-text);
  user-select: none;
  padding: 2px 0;
}

.hex-header .offset-col {
  color: var(--sz-color-gray-text);
  font-weight: bold;
}

.hex-header .hex-col {
  font-weight: bold;
}

.hex-header .ascii-col {
  font-weight: bold;
}

.hex-viewport {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  position: relative;
  outline: none;
}

.hex-scroll-content {
  position: relative;
}

.hex-rows {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
}

.hex-row {
  display: flex;
  font-family: 'Consolas', 'Lucida Console', 'Courier New', monospace;
  font-size: 13px;
  line-height: 18px;
  height: 18px;
  user-select: none;
  cursor: default;
}

.hex-row:hover {
  background: rgba(0,0,0,0.03);
}

.offset-col {
  flex-shrink: 0;
  color: #336699;
  padding: 0 8px 0 4px;
  text-align: right;
}

.hex-col {
  flex: 1;
  padding: 0 8px;
  display: flex;
  gap: 0;
  letter-spacing: 0;
}

.hex-byte {
  display: inline-block;
  width: 22px;
  text-align: center;
  cursor: default;
}

.hex-byte.group-space {
  margin-right: 6px;
}

.hex-byte.cursor {
  background: var(--sz-color-highlight);
  color: var(--sz-color-highlight-text);
}

.hex-byte.modified {
  color: #cc0000;
}

.hex-byte.modified.cursor {
  background: #cc0000;
  color: #fff;
}

.hex-byte.selected {
  background: var(--sz-color-highlight);
  color: var(--sz-color-highlight-text);
  opacity: 0.6;
}

.hex-byte.found {
  background: #ffff00;
  color: #000;
}

.ascii-sep {
  width: 1px;
  background: var(--sz-color-button-shadow);
  flex-shrink: 0;
  align-self: stretch;
}

.ascii-col {
  flex-shrink: 0;
  padding: 0 4px;
  display: flex;
  gap: 0;
}

.ascii-byte {
  display: inline-block;
  width: 8px;
  text-align: center;
  cursor: default;
}

.ascii-byte.non-printable {
  color: var(--sz-color-gray-text);
}

.ascii-byte.cursor {
  background: var(--sz-color-highlight);
  color: var(--sz-color-highlight-text);
}

.ascii-byte.modified {
  color: #cc0000;
}

.ascii-byte.modified.cursor {
  background: #cc0000;
  color: #fff;
}

.ascii-byte.selected {
  background: var(--sz-color-highlight);
  color: var(--sz-color-highlight-text);
  opacity: 0.6;
}

.ascii-byte.found {
  background: #ffff00;
  color: #000;
}

/* ---- 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: 11px;
  color: var(--sz-color-button-text);
  flex-shrink: 0;
  user-select: none;
  gap: 16px;
}

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

.status-bar .status-section.mode {
  font-weight: bold;
  min-width: 30px;
  text-align: center;
}

/* ---- 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;
  user-select: none;
}

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

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

.dialog-body label {
  display: block;
  margin-bottom: 4px;
}

.dialog-body input[type="text"] {
  width: 100%;
  padding: 2px 4px;
  font-size: 11px;
  font-family: 'Consolas', 'Lucida Console', monospace;
  border: 1px inset var(--sz-color-button-shadow);
  margin-top: 4px;
}

.dialog-body .radio-group {
  margin: 8px 0;
}

.dialog-body .radio-group label {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 4px;
  cursor: default;
}

.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;
}

/* Empty state */
.hex-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  color: var(--sz-color-gray-text);
  font-size: 13px;
  font-style: italic;
}

/* Active column indicator */
.hex-col.active-column {
  outline: 1px dotted rgba(0,0,0,0.1);
}

.ascii-col.active-column {
  outline: 1px dotted rgba(0,0,0,0.1);
}