/* ---------------------------------------------------------
   CUBLOK — design tokens
   Inspired by "papel milimetrado" (engineering grid paper):
   sage-green ruled lines on pale paper, blueprint ink labels.
--------------------------------------------------------- */
:root {
  /* Light mode — neutral grays, blue accent */
  --paper:      #FFFFFF;
  --panel:      #F0F0F0;
  --surface:    #E2E2E2;   /* raised surfaces: buttons, inputs */
  --line:       #CCCCCC;
  --grid-bold:  #8A8A8A;   /* muted labels, secondary text */
  --grid-deep:  #2B5FA8;   /* active accent blue */
  --ink:        #2A2A2A;
  --accent:     #2B5FA8;
  --accent-ink: #FFFFFF;
  --canvas-bg:  #F8F8F8;

  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', ui-monospace, monospace;
  --font-body:    'Inter', system-ui, sans-serif;

  --radius:    3px;
  --topbar-h:  42px;
  --lp-w:      220px;
  --rp-w:      248px;
  --sb-h:      28px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper:      #191919;
    --panel:      #222222;
    --surface:    #2C2C2C;
    --line:       #383838;
    --grid-bold:  #5A5A5A;
    --grid-deep:  #4A8EC4;
    --ink:        #D0D0D0;
    --accent:     #4A8EC4;
    --canvas-bg:  #191919;
  }
}

:root[data-theme="dark"] {
  --paper:      #191919;
  --panel:      #222222;
  --surface:    #2C2C2C;
  --line:       #383838;
  --grid-bold:  #5A5A5A;
  --grid-deep:  #4A8EC4;
  --ink:        #D0D0D0;
  --accent:     #4A8EC4;
  --canvas-bg:  #191919;
}

:root[data-theme="light"] {
  --paper:      #FFFFFF;
  --panel:      #F0F0F0;
  --surface:    #E2E2E2;
  --line:       #CCCCCC;
  --grid-bold:  #8A8A8A;
  --grid-deep:  #2B5FA8;
  --ink:        #2A2A2A;
  --accent:     #2B5FA8;
  --canvas-bg:  #F8F8F8;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }

html, body {
  height: 100%;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  overflow: hidden;
}

button, input { font-family: inherit; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ── APP shell ─────────────────────────────────────────── */

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

/* ── TOPBAR ────────────────────────────────────────────── */

.topbar {
  height: var(--topbar-h);
  min-height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: 0;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  padding: 0 14px;
  flex-shrink: 0;
  z-index: 50;
}

.topbar__brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.06em;
  color: var(--ink);
  padding-right: 18px;
  border-right: 1px solid var(--line);
  margin-right: 6px;
  flex-shrink: 0;
}

/* menu bar */
.topbar__menus {
  display: flex;
  align-items: stretch;
  flex: 1;
  height: 100%;
}

.topmenu {
  position: relative;
  display: flex;
  align-items: center;
}

.topmenu__trigger {
  background: none;
  border: none;
  padding: 0 11px;
  height: 100%;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--ink);
  cursor: pointer;
  white-space: nowrap;
  letter-spacing: 0.02em;
  opacity: 0.75;
  border-radius: 0;
}

.topmenu__trigger:hover {
  opacity: 1;
  background: var(--line);
}

.topmenu__drop {
  display: none;
  position: absolute;
  top: calc(100% + 1px);
  left: 0;
  background: var(--panel);
  border: 1px solid var(--line);
  min-width: 180px;
  z-index: 200;
  box-shadow: 0 4px 16px rgba(0,0,0,0.18);
  padding: 4px 0;
}

.topmenu:hover .topmenu__drop,
.topmenu:focus-within .topmenu__drop {
  display: block;
}

.topmenu__item {
  display: block;
  width: 100%;
  background: none;
  border: none;
  text-align: left;
  padding: 7px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink);
  cursor: pointer;
  white-space: nowrap;
}

.topmenu__item:hover:not(:disabled) { background: var(--line); }
.topmenu__item:disabled { opacity: 0.35; cursor: not-allowed; }
.topmenu__item.is-active { color: var(--grid-deep); font-weight: 600; }

.topbar__actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  padding-left: 14px;
  border-left: 1px solid var(--line);
  margin-left: 6px;
}

/* ── WORKSPACE ─────────────────────────────────────────── */

.workspace {
  display: grid;
  grid-template-columns: var(--lp-w) 1fr var(--rp-w);
  flex: 1;
  overflow: hidden;
  min-height: 0;
}

/* ── LEFT PANEL ────────────────────────────────────────── */

.panel-left {
  background: var(--panel);
  border-right: 1px solid var(--line);
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
}

.lp-section {
  padding: 12px 12px 10px;
  border-bottom: 1px solid var(--line);
}

.lp-section-hd {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--grid-bold);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.lp-section-hd--toggle {
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.lp-section-hd--toggle[aria-expanded="false"] .panel__arrow {
  transform: rotate(-90deg);
}

.panel__arrow {
  font-size: 10px;
  transition: transform 0.15s ease;
  color: var(--grid-bold);
}

/* tools row */
.lp-tools-row {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 8px;
}

.tool-icon {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  color: var(--ink);
  flex-shrink: 0;
  transition: background 0.1s, border-color 0.1s;
}

.tool-icon:hover:not(.is-active) {
  border-color: var(--grid-bold);
}

.tool-icon.is-active {
  background: var(--grid-deep);
  border-color: var(--grid-deep);
  color: #fff;
}

#artCanvas.is-eyedropper { cursor: crosshair; }

.lp-clear-btn {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 6px 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  color: var(--ink);
  cursor: pointer;
  text-align: center;
  letter-spacing: 0.03em;
}

.lp-clear-btn:hover { border-color: var(--grid-bold); }

/* hex colour input */
.lp-hex-row {
  display: flex;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0 8px;
  height: 28px;
  margin-bottom: 6px;
  transition: border-color 0.1s;
}

.lp-hex-row:focus-within { border-color: var(--accent); }

.lp-hex-prefix {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--grid-bold);
  flex-shrink: 0;
  line-height: 1;
  padding-right: 3px;
  user-select: none;
}

.lp-hex-input {
  flex: 1;
  min-width: 0;
  background: none;
  border: none;
  outline: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink);
  text-transform: uppercase;
}

.lp-hex-input::placeholder { color: var(--grid-bold); letter-spacing: 0.04em; }

/* color pick in tools row */
.lp-tools-sep {
  width: 1px;
  height: 22px;
  background: var(--line);
  flex-shrink: 0;
  margin: 0 2px;
}

.lp-color-pick {
  cursor: pointer;
  display: flex;
  align-items: center;
}

.lp-color-pick input[type="color"] {
  width: 34px;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 3px;
  background: none;
  cursor: pointer;
}

.lp-color-pick input[type="color"]:hover {
  border-color: var(--grid-deep);
}

/* palette */
#paletteBody {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 4px;
}

#paletteBody.is-hidden { display: none; }

.swatches {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 5px;
}

.swatch {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 2px;
  border: 1px solid rgba(0,0,0,0.15);
  cursor: pointer;
  padding: 0;
  position: relative;
}

.swatch.is-active {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}

.swatch--extra { display: none; }
.swatches--expanded .swatch--extra { display: block; }

.swatch-more {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 2px;
  border: 1px dashed var(--line);
  background: none;
  color: var(--grid-deep);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  cursor: pointer;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.swatch-more:hover { border-color: var(--grid-deep); color: var(--ink); }

.custom-color {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 11px;
  color: var(--ink);
}

.custom-color input[type="color"] {
  width: 30px;
  height: 22px;
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 0;
  background: none;
  cursor: pointer;
}

/* file import — minimal icon button next to section header */
.lp-import-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  color: var(--ink);
  flex-shrink: 0;
  transition: border-color 0.1s;
}

.lp-import-btn:hover { border-color: var(--grid-deep); color: var(--grid-deep); }

.lp-import-btn input[type="file"] {
  position: absolute;
  width: 0;
  height: 0;
  opacity: 0;
  pointer-events: none;
}

.image-preview {
  margin-bottom: 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
}

.image-preview img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 120px;
  object-fit: cover;
}

/* ── CANVAS AREA ───────────────────────────────────────── */

.canvas-area {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--paper);
}

.ca-toolbar {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 14px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
  flex-shrink: 0;
}

.board__scroll {
  flex: 1;
  overflow: auto;
  padding: 20px;
  display: flex;
}

/* ── BOARD (canvas + rulers) ───────────────────────────── */

.board__grid {
  display: grid;
  grid-template-columns: 30px auto;
  grid-template-rows: 20px auto;
  width: max-content;
  background: var(--paper);
  border: 1px solid var(--line);
  margin: auto;
}

/* rulers hidden state (default) */
.board__grid.rulers-hidden {
  grid-template-columns: auto;
  grid-template-rows: auto;
}

.board__grid.rulers-hidden .board__corner,
.board__grid.rulers-hidden .board__ruler-top,
.board__grid.rulers-hidden .board__ruler-left {
  display: none;
}

.board__grid.rulers-hidden .board__canvas-wrap {
  grid-column: 1;
  grid-row: 1;
}

.board__corner {
  grid-column: 1;
  grid-row: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--grid-bold);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}

.board__ruler-top {
  grid-column: 2;
  grid-row: 1;
  display: flex;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}

.board__ruler-top span {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--grid-bold);
  border-right: 1px solid var(--line);
}

.board__ruler-left {
  grid-column: 1;
  grid-row: 2;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--line);
  background: var(--panel);
}

.board__ruler-left span {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--grid-bold);
  border-bottom: 1px solid var(--line);
}

.board__ruler-top span.is-major,
.board__ruler-left span.is-major {
  color: var(--accent);
  font-weight: 600;
}

.board__canvas-wrap {
  grid-column: 2;
  grid-row: 2;
  position: relative;
  background: var(--canvas-bg);
  user-select: none;
  touch-action: none;
}

.board__canvas-wrap canvas {
  position: absolute;
  top: 0;
  left: 0;
  display: block;
}

#gridCanvas { z-index: 1; pointer-events: none; }
#artCanvas  { z-index: 2; cursor: crosshair; }

/* ── RIGHT PANEL ───────────────────────────────────────── */

.panel-right {
  background: var(--panel);
  border-left: 1px solid var(--line);
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
}

.rp-section {
  padding: 12px 14px 14px;
  border-bottom: 1px solid var(--line);
}

.rp-section-hd {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--grid-bold);
  margin-bottom: 10px;
}

.rp-prop-label {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--grid-bold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 5px;
}

.rp-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 6px 0;
}

.rp-row__label {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--grid-bold);
  white-space: nowrap;
  flex-shrink: 0;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.rp-meta {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--grid-bold);
  letter-spacing: 0.02em;
  margin-top: 8px;
}

/* fill type labels under the 4 buttons */
.rp-fill-labels {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  margin-top: -4px;
}

.rp-fill-labels span {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--grid-bold);
  text-align: center;
}

/* override cell-scale-toggle in right panel context */
.panel-right .cell-scale-toggle {
  border-left: none;
  padding-left: 0;
  display: flex;
  gap: 4px;
}

/* ── COLOR SUMMARY (chips) ─────────────────────────────── */

.color-summary {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 5px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--grid-bold);
  margin-top: 6px;
}

.color-summary__label {
  font-weight: 600;
  white-space: nowrap;
}

.color-summary__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
}

.color-chip {
  display: flex;
  align-items: center;
  gap: 3px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 2px 6px 2px 3px;
  font-size: 9px;
  color: var(--ink);
  white-space: nowrap;
}

.color-chip__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 1px solid rgba(0,0,0,0.15);
  flex-shrink: 0;
}

/* ── STATUS BAR ────────────────────────────────────────── */

.statusbar {
  height: var(--sb-h);
  min-height: var(--sb-h);
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 12px;
  background: var(--panel);
  border-top: 1px solid var(--line);
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--grid-bold);
}

.sb-sep {
  width: 1px;
  height: 14px;
  background: var(--line);
  flex-shrink: 0;
}

.sb-item {
  white-space: nowrap;
}

/* ── SHARED CONTROLS ───────────────────────────────────── */

/* Paper size and scale buttons */
.paper-toggle {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 8px;
}

.cell-scale-toggle {
  display: flex;
  gap: 4px;
}

.paper-btn {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 4px 9px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink);
  cursor: pointer;
}

.paper-btn.is-active {
  background: var(--grid-deep);
  border-color: var(--grid-deep);
  color: #fff;
}

/* Tool toggle (brush/eraser, fill types, mode) */
.tool-toggle {
  display: flex;
  gap: 5px;
  margin-bottom: 8px;
}

.tool-btn {
  flex: 1;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 7px 4px;
  font-size: 13px;
  color: var(--ink);
  cursor: pointer;
  text-align: center;
}

.tool-btn.is-active {
  background: var(--grid-deep);
  border-color: var(--grid-deep);
  color: #fff;
}

/* Buttons */
.btn {
  display: block;
  width: 100%;
  border-radius: var(--radius);
  padding: 8px 10px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
}

.btn--ghost {
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--ink);
}

.btn--ghost:hover { border-color: var(--grid-deep); }

.btn--accent {
  background: var(--accent);
  border: 1px solid var(--accent);
  color: var(--accent-ink);
  margin-top: 4px;
}

.btn--accent:hover { filter: brightness(1.05); }
.btn--accent:disabled { opacity: 0.4; cursor: not-allowed; filter: none; }

/* Qty field (nº de cores) */
.qty-field {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11px;
  margin-bottom: 8px;
}

.qty-field input {
  width: 52px;
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 4px 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  background: var(--surface);
  color: var(--ink);
}

.hint {
  font-size: 10px;
  line-height: 1.4;
  color: var(--grid-bold);
  margin-top: 6px;
}

/* Custom palette chips */
.custom-pal-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin: 2px 0;
}

.custom-pal-chip {
  position: relative;
  width: 28px;
  height: 28px;
}

.custom-pal-chip input[type="color"] {
  width: 28px;
  height: 28px;
  border: 1.5px solid var(--line);
  border-radius: 3px;
  cursor: pointer;
  padding: 1px;
  background: none;
}

.custom-pal-chip__rm {
  position: absolute;
  top: -5px;
  right: -5px;
  width: 13px;
  height: 13px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 50%;
  font-size: 9px;
  line-height: 13px;
  text-align: center;
  cursor: pointer;
  padding: 0;
  font-weight: 700;
}

/* Gallery link in topbar */
.topbar__gallery-link {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--grid-bold);
  text-decoration: none;
  padding: 5px 10px;
  border-radius: var(--radius);
  transition: color 0.1s, background 0.1s;
}

.topbar__gallery-link:hover {
  color: var(--ink);
  background: var(--surface);
}

/* Theme toggle — icon-only */
.theme-toggle {
  background: none;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  width: 30px;
  height: 30px;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  cursor: pointer;
  flex-shrink: 0;
  line-height: 1;
  transition: border-color 0.1s;
}

.theme-toggle:hover { border-color: var(--grid-bold); }

/* Eyedropper in left panel */
.eyedropper-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  width: 100%;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 6px 10px;
  font-size: 11px;
  color: var(--ink);
  cursor: pointer;
}

.eyedropper-btn:hover { border-color: var(--grid-deep); }

.eyedropper-btn.is-active {
  background: var(--grid-deep);
  border-color: var(--grid-deep);
  color: #fff;
}

/* Zoom buttons (in statusbar) */
.zoom-btn {
  width: 24px;
  height: 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 16px;
  line-height: 1;
  color: var(--ink);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  padding: 0;
  user-select: none;
}

.zoom-btn:hover:not(:disabled) { border-color: var(--grid-deep); }
.zoom-btn:disabled { opacity: 0.3; cursor: not-allowed; }
.zoom-btn.is-active { border-color: var(--accent); color: var(--accent); }

.zoom-val {
  font-weight: 600;
  min-width: 36px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--ink);
}

/* Grid style buttons (in canvas toolbar) */
.grid-style-btn {
  width: auto;
  padding: 0 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  height: 24px;
  letter-spacing: 0.04em;
}

/* ── ANIMATION ─────────────────────────────────────────── */

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  .panel__arrow { transition: none; }
}