/* Panels — monochrome UI (spec §8). Near-black, two grays, white. */

:root {
  --ink: #141414;
  --gray-dark: #666;
  --gray-light: #d9d9d9;
  --paper: #fff;
}

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

/* Make the hidden attribute win over any explicit display (flex labels etc.) */
[hidden] { display: none !important; }

html, body { height: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 13px;
  color: var(--ink);
  background: var(--paper);
}

#app {
  height: 100vh;
  display: grid;
  grid-template-columns: 190px 1fr 270px;
  grid-template-rows: auto 1fr auto;
  grid-template-areas:
    "topbar topbar topbar"
    "picker viewport inspector"
    "status status status";
}

/* --- top bar --- */
#topbar {
  grid-area: topbar;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  background: var(--ink);
  color: var(--paper);
}

#topbar h1 {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.18em;
}

#scene-name {
  font: inherit;
  font-weight: 600;
  width: 220px;
  padding: 3px 8px;
  background: transparent;
  color: var(--paper);
  border: 1px solid transparent;
}

#scene-name:hover, #scene-name:focus {
  border-color: var(--gray-dark);
  background: rgba(255, 255, 255, 0.08);
  outline: none;
}

#save-state { color: var(--gray-dark); font-size: 12px; }

.topbar-spacer { flex: 1; }

button {
  font: inherit;
  padding: 4px 12px;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--ink);
  cursor: pointer;
}

button:hover:not(:disabled) { background: var(--gray-light); }

button:disabled {
  background: var(--ink);
  color: var(--gray-dark);
  border-color: var(--gray-dark);
  cursor: default;
}

#btn-dev[aria-pressed="true"] {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--paper);
}

/* --- picker --- */
#picker {
  grid-area: picker;
  border-right: 1px solid var(--gray-light);
  overflow-y: auto;
  padding: 10px;
}

.picker-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.picker-header span {
  font-weight: 700;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.picker-header button { padding: 2px 10px; }

.scene-tile {
  position: relative;
  margin: 0 0 6px;
  border: 1px solid var(--gray-light);
  background: var(--paper);
}

.scene-tile:hover { border-color: var(--ink); }

.scene-pick {
  display: block;
  width: 100%;
  padding: 0;
  border: none;
  background: none;
  text-align: left;
  cursor: pointer;
}

.scene-pick img {
  display: block;
  width: 100%;
  border-bottom: 1px solid var(--gray-light);
}

.scene-pick .name {
  display: block;
  padding: 5px 7px;
  font-size: 12px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.scene-delete, .scene-pin {
  position: absolute;
  top: 3px;
  width: 20px;
  padding: 0 0 2px;
  line-height: 16px;
  border: 1px solid var(--gray-dark);
  background: var(--paper);
  opacity: 0;
}

.scene-delete { right: 3px; }
.scene-pin { left: 3px; font-size: 11px; }

.scene-tile:hover .scene-delete,
.scene-tile:hover .scene-pin,
.scene-tile.pinned .scene-pin { opacity: 1; }

.scene-tile.dragging { opacity: 0.4; }

.scene-tile.drop-before { box-shadow: 0 -3px 0 0 var(--ink); }
.scene-tile.drop-after { box-shadow: 0 3px 0 0 var(--ink); }

.scene-tile.active { border-color: var(--ink); box-shadow: 0 0 0 1px var(--ink); }

.scene-tile.active .scene-pick .name {
  background: var(--ink);
  color: var(--paper);
}

.scene-tile.armed { border-style: dashed; border-color: var(--ink); }

.scene-tile.deleting .scene-delete {
  opacity: 1;
  background: var(--ink);
  color: var(--paper);
}

/* --- viewport --- */
#viewport {
  grid-area: viewport;
  position: relative;
  overflow: hidden;
  background: var(--paper);
}

#canvas3d {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

/* --- inspector --- */
#inspector {
  grid-area: inspector;
  border-left: 1px solid var(--gray-light);
  overflow-y: auto;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

fieldset {
  border: 1px solid var(--gray-light);
  padding: 8px 10px 10px;
}

legend {
  font-weight: 700;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0 4px;
}

fieldset label {
  display: block;
  margin: 6px 0 2px;
  color: var(--ink);
}

fieldset label.check {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 8px 0 2px;
}

input[type="range"] {
  width: 100%;
  display: block;
  margin-top: 2px;
  accent-color: var(--ink);
}

input[type="checkbox"], input[type="radio"] { accent-color: var(--ink); }

.radio-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin: 8px 0 2px;
}

.radio-row .row-label { font-weight: 400; }

.radio-row label {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  margin: 0;
}

/* --- view gizmo --- */
#view-gizmo {
  position: absolute;
  top: 10px;
  right: 10px;
  display: grid;
  grid-template-columns: repeat(3, 26px);
  grid-template-rows: repeat(3, 26px);
  gap: 2px;
  z-index: 5;
}

#view-gizmo button {
  padding: 0;
  font-size: 10px;
  font-weight: 700;
  border: 1px solid var(--ink);
  background: rgba(255, 255, 255, 0.85);
  cursor: pointer;
}

#view-gizmo button:hover {
  background: var(--ink);
  color: var(--paper);
}

.vg-top { grid-area: 1 / 2; }
.vg-left { grid-area: 2 / 1; }
.vg-front { grid-area: 2 / 2; }
.vg-right { grid-area: 2 / 3; }
.vg-back { grid-area: 3 / 2; }

/* --- panel frame overlay --- */
.frame-scrim {
  position: absolute;
  background: rgba(255, 255, 255, 0.75);
  pointer-events: none;
}

.frame-outline {
  position: absolute;
  border: 1px solid var(--ink);
  box-sizing: border-box;
  pointer-events: none;
}

.grid-line {
  position: absolute;
  background: rgba(20, 20, 20, 0.28);
  pointer-events: none;
}

.grid-line.v { top: 0; bottom: 0; width: 1px; }
.grid-line.h { left: 0; right: 0; height: 1px; }

/* --- camera setups --- */
.setups-head {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 10px 0 4px;
}

.setups-head .row-label { flex: 1; }

.setups-head button { padding: 1px 8px; }

.setup-chip {
  display: flex;
  margin: 0 0 4px;
}

.setup-apply {
  flex: 1;
  text-align: left;
  padding: 3px 8px;
  font-size: 12px;
  border: 1px solid var(--gray-dark);
  border-right: none;
  background: var(--paper);
}

.setup-apply:hover { background: var(--gray-light); }

.setup-delete {
  width: 22px;
  padding: 0 0 2px;
  border: 1px solid var(--gray-dark);
  background: var(--paper);
}

.setup-rename {
  flex: 1;
  font: inherit;
  font-size: 12px;
  padding: 2px 7px;
  border: 1px solid var(--ink);
}

/* --- selected object / add object / dev --- */
.sel-label {
  font-weight: 700;
  margin: 4px 0 2px;
}

.sel-name {
  cursor: text;
  border-bottom: 1px dashed var(--gray-dark);
}

.sel-name:hover { border-bottom-color: var(--ink); }

.sel-name-input {
  font: inherit;
  font-weight: 700;
  width: 55%;
  padding: 0 2px;
  border: 1px solid var(--ink);
}

.mode-row {
  display: flex;
  gap: 0;
  margin: 6px 0 2px;
}

.mode-btn {
  flex: 1;
  padding: 3px 4px;
  font-size: 11px;
  border: 1px solid var(--gray-dark);
  border-right-width: 0;
  background: var(--paper);
}

.mode-btn:last-child { border-right-width: 1px; }

.mode-btn.active {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.drop-btn {
  width: 100%;
  margin: 4px 0 2px;
  padding: 3px 4px;
  font-size: 11px;
}

/* Fixed-height panel: reserves the tallest (figure) layout so selection
   changes never push the sections below around. */
#selected-body {
  min-height: 283px;
  display: flex;
  flex-direction: column;
}

#selected-body .placeholder {
  color: var(--gray-dark);
  margin: auto;
  text-align: center;
  line-height: 1.6;
}

.btn-row {
  display: flex;
  gap: 6px;
  margin: 6px 0 2px;
}

.btn-row button { flex: 1; padding: 4px 6px; }

.btn-row button svg {
  width: 18px;
  height: 18px;
  display: block;
  margin: 0 auto;
}

.btn-row select {
  flex: 2;
  font: inherit;
  border: 1px solid var(--ink);
  background: var(--paper);
  padding: 3px 4px;
}

.full-width, #panel-aspect-custom {
  width: 100%;
  margin: 6px 0 2px;
}

#panel-aspect-custom {
  font: inherit;
  border: 1px solid var(--gray-dark);
  padding: 2px 4px;
}

select {
  font: inherit;
  border: 1px solid var(--ink);
  background: var(--paper);
  padding: 3px 4px;
}

.size-row {
  display: flex;
  gap: 6px;
}

.size-row label {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 4px;
}

input[type="number"] {
  width: 100%;
  min-width: 0;
  font: inherit;
  border: 1px solid var(--gray-dark);
  padding: 2px 4px;
}

.dev-only { display: none; }

body.dev .dev-only {
  display: block;
  border-top: 1px dashed var(--gray-light);
  margin-top: 8px;
  padding-top: 4px;
}

#dev-section button {
  width: 100%;
  margin: 6px 0 2px;
}

#dev-section textarea {
  width: 100%;
  font-family: ui-monospace, Menlo, monospace;
  font-size: 11px;
  border: 1px solid var(--gray-dark);
  padding: 4px;
  resize: vertical;
  margin-top: 6px;
}

/* --- status bar --- */
#statusbar {
  grid-area: status;
  display: flex;
  justify-content: space-between;
  padding: 5px 12px;
  border-top: 1px solid var(--gray-light);
  color: var(--gray-dark);
}

.status-right {
  display: flex;
  align-items: center;
  gap: 14px;
}

#statusbar a,
.link-btn {
  color: inherit;
}

#statusbar a:hover,
.link-btn:hover { color: var(--paper); }

/* A button that reads as a text link (Shortcuts) — no button chrome. */
.link-btn {
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  cursor: pointer;
  text-decoration: underline;
}

.link-btn:hover:not(:disabled) { background: none; }

/* --- dialogs (Share, Shortcuts) --- */
.panels-dialog {
  /* margin:auto restores the native centering the global `* { margin:0 }`
     reset would otherwise strip from showModal()'d dialogs. */
  margin: auto;
  border: 1px solid var(--ink);
  padding: 0;
  color: var(--ink);
  background: var(--paper);
  max-width: 440px;
  width: calc(100vw - 40px);
}

.panels-dialog::backdrop {
  background: rgba(20, 20, 20, 0.45);
}

.panels-dialog form { padding: 18px 20px 16px; }

.panels-dialog h2 {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.dialog-note {
  color: var(--gray-dark);
  margin-bottom: 12px;
  line-height: 1.4;
}

.dialog-url {
  width: 100%;
  font: inherit;
  font-size: 12px;
  padding: 6px 8px;
  border: 1px solid var(--gray-dark);
  color: var(--ink);
  background: var(--paper);
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 14px;
}

.shortcut-list {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 8px 16px;
  align-items: baseline;
}

.shortcut-list dt {
  white-space: nowrap;
  text-align: right;
  color: var(--gray-dark);
}

.shortcut-list kbd {
  display: inline-block;
  font: inherit;
  font-size: 11px;
  min-width: 18px;
  padding: 1px 5px;
  text-align: center;
  border: 1px solid var(--gray-dark);
  border-radius: 3px;
  background: var(--gray-light);
  color: var(--ink);
}

.shortcut-list kbd + kbd { margin-left: 2px; }