:root {
  --bg: #05060a;
  --panel: #0f111a;
  --border: rgba(255, 255, 255, 0.08);
  --fg: #f7f7f7;
  --muted: #a0a8b7;
  --accent: #7aa2f7;
  --danger: #ff7b7b;
  --radius: 12px;
  --sidebar-width: 260px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font: 14px/1.5 "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;
  background: var(--bg);
  color: var(--fg);
}

.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) 6px 1fr;
  min-height: 100vh;
}

#sidebar {
  background: #080910;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: auto;
}

.sidebar-brand {
  padding: 18px;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
  color: var(--muted);
}

.sidebar-brand strong {
  font-size: 16px;
  color: var(--fg);
}

#sidebarResizer {
  width: 6px;
  cursor: col-resize;
  background: rgba(255, 255, 255, 0.04);
}

#toolGroups {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
}

#toolGroups details {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid transparent;
  border-radius: 10px;
  margin-bottom: 8px;
}

#toolGroups summary {
  cursor: pointer;
  padding: 6px 10px;
  font-weight: 600;
  color: var(--muted);
}

#toolGroups .tool-buttons {
  display: flex;
  flex-direction: column;
  padding: 4px 6px 10px;
  gap: 4px;
}

#toolGroups .tool-buttons button {
  text-align: left;
  background: transparent;
  color: var(--fg);
  border: 1px solid transparent;
  padding: 6px 10px;
  border-radius: 8px;
  font: inherit;
  cursor: pointer;
}

#toolGroups .tool-buttons button.active {
  background: rgba(122, 162, 247, 0.15);
  border-color: rgba(122, 162, 247, 0.4);
}

.workspace {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  background: rgba(5, 6, 10, 0.85);
  backdrop-filter: blur(12px);
}

.tool-info h1 {
  margin: 0;
  font-size: 18px;
}

.tool-info p {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.converter-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mode-select {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius);
  padding: 4px;
}

.actions {
  display: flex;
  gap: 8px;
}

select,
button {
  appearance: none;
  border: 1px solid transparent;
  padding: 8px 12px;
  border-radius: 10px;
  font: inherit;
  color: var(--fg);
  background: rgba(255, 255, 255, 0.04);
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}

select:focus,
button:focus {
  outline: none;
  border-color: var(--accent);
}

button {
  background: var(--accent);
  border-color: transparent;
  color: #05060a;
  font-weight: 600;
}

button#clear {
  background: rgba(255, 255, 255, 0.08);
  color: var(--fg);
}

button#swap {
  background: rgba(255, 255, 255, 0.08);
  color: var(--fg);
  font-size: 18px;
  line-height: 1;
  padding: 8px;
}

.tool-view {
  display: grid;
  gap: 16px;
  padding: 16px 24px 8px;
}

#converterWorkspace {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

#coderWorkspace {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

#pairWorkspace {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

#numberWorkspace {
  grid-template-columns: 1fr;
}

#ipv4Workspace {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

#uuidWorkspace,
#userAgentWorkspace {
  grid-template-columns: 1fr;
}

.tool-view.hidden {
  display: none;
}

.panel {
  display: flex;
  flex-direction: column;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 18px;
  border-bottom: 1px solid var(--border);
}

.coder-header {
  flex-wrap: wrap;
  gap: 12px;
}

.decode-select {
  display: flex;
  flex-direction: column;
  font-size: 11px;
  color: var(--muted);
  gap: 4px;
}

.decode-select select {
  min-width: 180px;
}

.decode-select.hidden {
  display: none;
}

.pair-controls {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
}

.jwt-controls {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.jwt-controls.hidden {
  display: none;
}

.jwt-controls label {
  display: flex;
  flex-direction: column;
  font-size: 11px;
  color: var(--muted);
  gap: 4px;
}

.jwt-controls select,
.jwt-controls input {
  min-width: 150px;
}

.number-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  padding: 16px 18px 24px;
}

.number-grid label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 12px;
  color: var(--muted);
}

.number-grid input {
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 10px;
  background: rgba(0, 0, 0, 0.25);
  color: var(--fg);
  font: inherit;
}

.number-grid input:focus {
  outline: 1px solid var(--accent);
  border-color: transparent;
}

.ipv4-results {
  padding: 16px 18px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.ipv4-stats .stat {
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 6px;
}

.ipv4-results .stat {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 6px;
}

.ipv4-results .stat span:first-child {
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 11px;
}

.panel-header h2 {
  margin: 0;
  font-size: 16px;
}

.panel-header p {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.panel-actions {
  display: flex;
  gap: 6px;
}

.panel-actions.hidden {
  display: none;
}

.panel-actions .ghost-btn {
  background: rgba(255, 255, 255, 0.08);
  color: var(--fg);
  border: 1px solid var(--border);
  font-weight: 500;
  font-size: 12px;
  padding: 6px 10px;
}

.panel-actions .ghost-btn:hover {
  background: rgba(255, 255, 255, 0.14);
}

textarea {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--fg);
  font: inherit;
  padding: 16px 18px;
  resize: none;
  min-height: 220px;
}

textarea:focus {
  outline: none;
}

.coder-results {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 16px 18px 24px;
}

.coder-groups {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.coder-output-group > header {
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 11px;
}

.coder-output-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}

.coder-output-block {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.coder-output-block > header {
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 12px;
}

.coder-output-entries {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.coder-entry {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.coder-entry.click-copy {
  cursor: pointer;
}

.coder-entry.click-copy textarea {
  pointer-events: none;
}

.coder-entry-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--muted);
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.05em;
}

.coder-entry-meta button {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--fg);
  font-size: 10px;
  padding: 2px 6px;
  text-transform: none;
}

.coder-entry-meta button:hover {
  background: rgba(255, 255, 255, 0.14);
}

.copy-hint {
  font-size: 10px;
  text-transform: none;
  letter-spacing: normal;
  color: var(--muted);
}

.coder-entry textarea {
  width: 100%;
  min-height: 80px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.25);
  color: var(--fg);
  font: inherit;
  padding: 10px;
  resize: vertical;
  white-space: pre;
}

.pair-meta {
  margin: 0;
  padding: 16px 18px 24px;
  font-size: 12px;
  color: var(--muted);
  white-space: pre-wrap;
  border-top: 1px solid var(--border);
}

.pair-meta.hidden {
  display: none;
}

.muted {
  color: var(--muted);
}

footer {
  margin-top: auto;
  display: flex;
  justify-content: space-between;
  padding: 12px 24px 20px;
  color: var(--muted);
  font-size: 12px;
  border-top: 1px solid var(--border);
}

.hotkeys {
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

#status[data-state="error"] {
  color: var(--danger);
}

#status[data-state="ready"] {
  color: var(--accent);
}

.converter-controls.hidden,
.converter-only.hidden {
  display: none;
}

body.tool-coder .converter-controls,
body.tool-coder .converter-only,
body.tool-pair .converter-controls,
body.tool-pair .converter-only,
body.tool-number .converter-controls,
body.tool-number .converter-only,
body.tool-ipv4 .converter-controls,
body.tool-ipv4 .converter-only,
body.tool-generator .converter-controls,
body.tool-generator .converter-only {
  display: none;
}

.uuid-list {
  padding: 16px 18px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.uuid-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.02);
}

.uuid-row code {
  font-size: 15px;
  color: var(--fg);
}

.uuid-row button {
  padding: 4px 8px;
  font-size: 12px;
}

.generator-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.ua-results {
  padding: 16px 18px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.ua-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.02);
  display: flex;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
}

.ua-card code {
  font-size: 13px;
  word-break: break-all;
}

.ua-meta {
  font-size: 12px;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.ua-meta span {
  display: flex;
  gap: 4px;
  align-items: baseline;
}

.ua-meta span strong {
  font-weight: 600;
  color: var(--fg);
}

@media (max-width: 960px) {
  .app-shell {
    grid-template-columns: minmax(200px, 220px) 4px 1fr;
  }
  #converterWorkspace,
  #coderWorkspace,
  #ipv4Workspace {
    grid-template-columns: 1fr;
  }
  .converter-controls {
    flex-direction: column;
    align-items: flex-start;
  }
}