:root {
  --bg: #0e1116;
  --panel: #161b22;
  --panel-2: #1c232d;
  --line: #2a333f;
  --text: #e6edf3;
  --muted: #8b98a5;
  --accent: #4fd1c5;
  --accent-dim: #2c7a75;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  background: var(--bg);
  color: var(--text);
  font-family: "SF Mono", "JetBrains Mono", ui-monospace, monospace;
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 76px;
}
header .brand {
  display: flex;
  align-items: baseline;
  gap: 14px;
}
header h1 {
  font-size: 28px;
  letter-spacing: 0.5px;
  font-weight: 600;
  line-height: 1;
}
header .sub {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.5px;
}
header .header-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
}
header #saveBtn {
  width: auto;
  min-width: 112px;
  padding: 9px 12px;
  font-size: 12px;
}
.actionbar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  padding: 10px 16px;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}
.actionbar button.action {
  width: auto;
  min-width: 92px;
  padding: 8px 11px;
  font-size: 12px;
}
.actionbar button.primary {
  min-width: 108px;
}
.actionbar .hint {
  margin-left: 8px;
  flex: 1 1 280px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.wrap {
  flex: 1;
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 0;
}
aside {
  background: var(--panel);
  border-right: 1px solid var(--line);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 22px;
  overflow-y: auto;
}
.group h2 {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--muted);
  margin-bottom: 12px;
}
.row {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 14px;
}
.row label {
  font-size: 12px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
}
.row label span {
  color: var(--accent);
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  border-radius: 2px;
  background: var(--panel-2);
  outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
}
input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: none;
  background: var(--accent);
  cursor: pointer;
}

.tools {
  display: flex;
  gap: 8px;
}
.tool-btn {
  flex: 1;
  padding: 9px 0;
  font-size: 12px;
  background: var(--panel-2);
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 6px;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.12s;
}
.tool-btn.active {
  background: var(--accent-dim);
  color: var(--text);
  border-color: var(--accent);
}
.tool-btn:hover:not(.active) {
  color: var(--text);
}

.mode-btn {
  flex: 1;
  padding: 9px 0;
  font-size: 12px;
  background: var(--panel-2);
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 6px;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.12s;
}
.mode-btn.active {
  background: var(--accent-dim);
  color: var(--text);
  border-color: var(--accent);
}
.mode-btn:hover:not(.active) {
  color: var(--text);
}

.mode-tools {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.mode-tools .mode-btn:last-child:nth-child(3) {
  grid-column: 1 / -1;
}

button.action {
  padding: 11px;
  font-size: 13px;
  font-family: inherit;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 6px;
  cursor: pointer;
  letter-spacing: 0.4px;
  transition: all 0.12s;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
button.action svg {
  flex: none;
  opacity: 0.85;
}
button.action:hover {
  border-color: var(--accent);
}
button.action:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.image-actions {
  display: flex;
  gap: 8px;
  align-items: stretch;
  width: 100%;
}
.image-actions #loadBtn {
  flex: 1;
  min-width: 0;
}
button.close-image-btn {
  flex: 0 0 42px;
  width: 42px;
  min-width: 42px;
  padding: 0;
}
#closeBtn:not(:disabled) {
  color: #ffb0b0;
  border-color: rgba(224, 108, 108, 0.45);
  background: rgba(224, 108, 108, 0.1);
}
#closeBtn:not(:disabled):hover {
  color: #ffd1d1;
  border-color: #e06c6c;
  background: rgba(224, 108, 108, 0.18);
}
button.primary {
  background: var(--accent);
  color: #06201e;
  font-weight: 600;
  border-color: var(--accent);
}
button.primary:hover {
  background: #6fe0d5;
}

main {
  position: relative;
  overflow: hidden;
  padding: 0;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: stretch;
}
#stage {
  position: relative;
  line-height: 0;
}
#base {
  display: block;
  border-radius: 4px;
  image-rendering: auto;
}
#overlay {
  position: absolute;
  top: 0;
  left: 0;
  cursor: crosshair;
}

.drop {
  text-align: center;
  color: var(--muted);
  border: 1.5px dashed var(--line);
  border-radius: 10px;
  padding: 60px 50px;
  cursor: pointer;
  transition: border-color 0.15s;
}
.drop:hover {
  border-color: var(--accent-dim);
}
.drop strong {
  display: block;
  color: var(--text);
  font-size: 15px;
  margin-bottom: 6px;
}
.drop small {
  font-size: 12px;
}

.hint {
  font-size: 11px;
  color: var(--muted);
  line-height: 1.5;
}

.info-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  font-size: 9px;
  font-style: normal;
  font-weight: 600;
  color: var(--muted);
  border: 1px solid var(--line);
  cursor: help;
  user-select: none;
  vertical-align: middle;
  text-transform: none;
  letter-spacing: normal;
}
.info-icon:hover,
.info-icon:focus-visible {
  color: var(--accent);
  border-color: var(--accent-dim);
}

.reset-link {
  font-family: inherit;
  font-size: 10px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 3px 8px;
  cursor: pointer;
  transition: all 0.12s;
}
.reset-link:hover {
  color: var(--accent);
  border-color: var(--accent-dim);
}

.linked-badge {
  font-size: 9px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  border-radius: 4px;
  padding: 1px 5px;
  margin-left: 6px;
  vertical-align: middle;
  font-weight: 600;
}

/* toggle switch */
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--muted);
  cursor: pointer;
}
.switch {
  position: relative;
  width: 38px;
  height: 20px;
  flex: none;
}
.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}
.track {
  position: absolute;
  inset: 0;
  border-radius: 20px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  transition: 0.15s;
}
.track::before {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  left: 3px;
  top: 2px;
  border-radius: 50%;
  background: var(--muted);
  transition: 0.15s;
}
.switch input:checked + .track {
  background: var(--accent-dim);
  border-color: var(--accent);
}
.switch input:checked + .track::before {
  transform: translateX(18px);
  background: var(--accent);
}

/* zoom bar over the canvas */
.zoombar {
  position: absolute;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 4px;
  background: rgba(22, 27, 34, 0.92);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 4px;
  z-index: 5;
  backdrop-filter: blur(6px);
}
.zoombar button {
  width: 30px;
  height: 28px;
  font-size: 15px;
  font-family: inherit;
  background: transparent;
  color: var(--text);
  border: none;
  cursor: pointer;
  border-radius: 5px;
}
.zoombar button:hover {
  background: var(--panel-2);
}
.zoombar .z-level {
  min-width: 48px;
  text-align: center;
  font-size: 12px;
  color: var(--muted);
}

/* metadata button + panel */
.meta-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 6;
  display: flex;
  align-items: center;
  gap: 7px;
  font-family: inherit;
  font-size: 12px;
  letter-spacing: 0.3px;
  color: var(--text);
  background: rgba(22, 27, 34, 0.92);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 7px 11px;
  cursor: pointer;
  backdrop-filter: blur(6px);
  transition: all 0.12s;
}
.meta-btn:hover {
  border-color: var(--accent);
}
.meta-btn.active {
  border-color: var(--accent);
  color: var(--accent);
}
.meta-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.meta-btn:disabled:hover {
  border-color: var(--line);
}
.meta-btn svg {
  opacity: 0.85;
}
.meta-count {
  font-size: 10px;
  font-weight: 600;
  min-width: 16px;
  text-align: center;
  background: var(--accent);
  color: #06201e;
  border-radius: 9px;
  padding: 1px 5px;
  margin-left: 2px;
}
.file-info {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 5;
  width: 220px;
  padding: 10px 12px;
  background: rgba(22, 27, 34, 0.92);
  border: 1px solid var(--line);
  border-radius: 8px;
  backdrop-filter: blur(6px);
}
.file-info[hidden] {
  display: none;
}
.file-info h3 {
  font-size: 10px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 8px;
}
.file-info dl {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr);
  gap: 5px 8px;
  font-size: 11px;
  line-height: 1.3;
}
.file-info dt {
  color: var(--muted);
}
.file-info dd {
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  text-align: right;
}

.meta-panel {
  position: absolute;
  top: 58px;
  right: 16px;
  z-index: 7;
  width: 320px;
  max-height: calc(100% - 74px);
  display: flex;
  flex-direction: column;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
}
.meta-panel[hidden] {
  display: none;
}
.meta-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
  letter-spacing: 0.4px;
  color: var(--text);
}
.meta-x {
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  padding: 0 2px;
}
.meta-x:hover {
  color: var(--text);
}
.meta-note {
  padding: 9px 14px;
  font-size: 11px;
  color: var(--muted);
  line-height: 1.5;
  border-bottom: 1px solid var(--line);
}
.meta-list {
  overflow-y: auto;
  flex: 1;
  padding: 6px 0;
}
.meta-item {
  padding: 7px 14px;
  border-bottom: 1px solid rgba(42, 51, 63, 0.5);
}
.meta-item .k {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--muted);
  margin-bottom: 4px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.meta-item .k button {
  background: rgba(224, 108, 108, 0.12);
  border: 1px solid rgba(224, 108, 108, 0.35);
  color: #ff8f8f;
  cursor: pointer;
  font-size: 10px;
  padding: 2px 6px;
  line-height: 1.2;
  border-radius: 4px;
  text-transform: none;
  letter-spacing: 0;
}
.meta-item .k button:hover {
  background: rgba(224, 108, 108, 0.2);
  border-color: #e06c6c;
  color: #ffd1d1;
}
.meta-item input {
  width: 100%;
  font-family: inherit;
  font-size: 12px;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 6px 8px;
}
.meta-item input:focus {
  outline: none;
  border-color: var(--accent-dim);
}
.meta-empty {
  padding: 18px 14px;
  font-size: 12px;
  color: var(--muted);
  text-align: center;
}

.meta-add {
  display: flex;
  gap: 6px;
  padding: 10px 14px;
  border-top: 1px solid var(--line);
}
.meta-add select,
.meta-add input {
  font-family: inherit;
  font-size: 11px;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 6px;
  min-width: 0;
}
.meta-add select {
  flex: 1.2;
}
.meta-add input {
  flex: 1.4;
}
.meta-add button {
  font-family: inherit;
  font-size: 11px;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 6px 10px;
  cursor: pointer;
}
.meta-add button:hover {
  border-color: var(--accent);
}

.meta-actions {
  display: flex;
  gap: 8px;
  padding: 10px 14px;
  border-top: 1px solid var(--line);
}
.meta-action {
  flex: 1;
  font-family: inherit;
  font-size: 11px;
  letter-spacing: 0.3px;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px;
  cursor: pointer;
  transition: all 0.12s;
}
.meta-action:hover {
  border-color: var(--accent);
}
.meta-action.primary {
  background: var(--accent);
  color: #06201e;
  font-weight: 600;
  border-color: var(--accent);
}
.meta-action.primary:hover {
  background: #6fe0d5;
}
.meta-action:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

#viewport {
  position: relative;
  overflow: auto;
  width: 100%;
  height: auto;
  flex: 1;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
#viewport.panning {
  cursor: grabbing;
}
#stage {
  margin: auto;
}