*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  overflow: hidden;
  background:
    radial-gradient(900px 520px at 8% -10%, rgba(34, 211, 238, 0.08), transparent 70%),
    radial-gradient(820px 520px at 96% 0%, rgba(167, 139, 250, 0.07), transparent 72%),
    var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

button,
input,
select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
}

img,
canvas,
svg {
  display: block;
}

[hidden] {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 100;
  padding: 9px 14px;
  border-radius: 8px;
  background: var(--cyan);
  color: #04121a;
  font-weight: 700;
  text-decoration: none;
  transition: top 0.18s var(--ease);
}

.skip:focus {
  top: 10px;
}

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

.app {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  height: 100dvh;
  min-height: 520px;
}

/* ---------- top bar ---------- */

.app-bar {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
  background: rgba(6, 10, 18, 0.92);
  backdrop-filter: blur(14px);
  z-index: 20;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 168px;
}

.brand-mark {
  position: relative;
  display: grid;
  gap: 3px;
  width: 30px;
  padding: 5px 4px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: linear-gradient(160deg, rgba(34, 211, 238, 0.18), rgba(167, 139, 250, 0.14));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.brand-mark span {
  height: 3px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
}

.brand-mark span:nth-child(2) {
  opacity: 0.75;
}

.brand-mark span:nth-child(3) {
  opacity: 0.5;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-text strong {
  font-size: 15px;
  letter-spacing: 0.01em;
}

.brand-text small {
  color: var(--dim);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.doc-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  flex: 1;
}

.doc-name {
  width: min(240px, 28vw);
  padding: 7px 10px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  font-weight: 600;
  text-overflow: ellipsis;
}

.doc-name:hover {
  border-color: var(--line);
}

.doc-name:focus {
  border-color: rgba(103, 232, 249, 0.55);
  background: var(--panel);
  outline: none;
}

.doc-size {
  color: var(--dim);
  font-family: var(--mono);
  font-size: 11.5px;
  white-space: nowrap;
}

.file-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.history-actions {
  display: flex;
  align-items: center;
  gap: 4px;
  padding-left: 10px;
  border-left: 1px solid var(--line);
}

/* ---------- controls ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  font-weight: 600;
  font-size: 12.5px;
  white-space: nowrap;
  transition: background 0.15s var(--ease), border-color 0.15s var(--ease), color 0.15s var(--ease);
}

.btn-ghost {
  border-color: var(--line);
  color: var(--muted);
  background: rgba(10, 17, 29, 0.55);
}

.btn-ghost:hover {
  border-color: var(--line-strong);
  color: var(--text);
  background: var(--panel-2);
}

.btn-primary {
  border-color: rgba(103, 232, 249, 0.5);
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.22), rgba(167, 139, 250, 0.22));
  color: #dffbff;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

.btn-primary:hover {
  border-color: var(--cyan);
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.36), rgba(167, 139, 250, 0.32));
}

.btn-small {
  min-height: 28px;
  padding: 0 9px;
  font-size: 11.5px;
}

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
}

.icon-btn:hover {
  border-color: var(--line);
  background: var(--panel-2);
  color: var(--text);
}

.icon-btn:disabled {
  opacity: 0.35;
  cursor: default;
}

.icon-btn-danger:hover {
  color: var(--danger);
  border-color: rgba(251, 113, 133, 0.35);
}

.icon-btn svg,
.tool-btn svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ---------- workspace ---------- */

.workspace {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr) 292px;
  min-height: 0;
}

.tool-rail {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 8px 5px;
  border-right: 1px solid var(--line);
  background: rgba(7, 12, 22, 0.86);
  overflow-y: auto;
  scrollbar-width: thin;
}

.tool-btn {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 9px;
  background: transparent;
  color: var(--muted);
  transition: color 0.13s var(--ease), background 0.13s var(--ease), border-color 0.13s var(--ease);
}

.tool-btn:hover {
  color: var(--text);
  background: var(--panel-2);
  border-color: var(--line);
}

.tool-btn[aria-pressed="true"] {
  color: #dffbff;
  background: linear-gradient(145deg, rgba(34, 211, 238, 0.22), rgba(167, 139, 250, 0.18));
  border-color: rgba(103, 232, 249, 0.45);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

.tool-btn-quiet {
  color: var(--dim);
}

.rail-separator {
  width: 22px;
  height: 1px;
  margin: 4px 0;
  background: var(--line);
}

.stage-wrap {
  position: relative;
  overflow: hidden;
  min-width: 0;
  min-height: 0;
  background:
    radial-gradient(ellipse at center, rgba(20, 31, 50, 0.55), transparent 68%),
    #080c14;
  touch-action: none;
}

.stage-wrap::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(ellipse at center, transparent 55%, rgba(2, 5, 10, 0.42));
}

.doc-frame {
  position: absolute;
  z-index: 0;
  border: 1px solid rgba(148, 163, 184, 0.3);
  background-color: var(--checker-dark);
  background-image:
    linear-gradient(45deg, var(--checker-light) 25%, transparent 25%),
    linear-gradient(-45deg, var(--checker-light) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--checker-light) 75%),
    linear-gradient(-45deg, transparent 75%, var(--checker-light) 75%);
  background-size: 24px 24px;
  background-position: 0 0, 0 12px, 12px -12px, -12px 0;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(2, 6, 14, 0.8);
  pointer-events: none;
}

.stage,
.overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.stage {
  z-index: 1;
  outline: none;
  cursor: crosshair;
}

.overlay {
  z-index: 2;
  pointer-events: none;
}

.stage[data-cursor="move"] { cursor: move; }
.stage[data-cursor="grab"] { cursor: grab; }
.stage[data-cursor="grabbing"] { cursor: grabbing; }
.stage[data-cursor="crosshair"] { cursor: crosshair; }
.stage[data-cursor="text"] { cursor: text; }
.stage[data-cursor="zoom"] { cursor: zoom-in; }
.stage[data-cursor="zoom-out"] { cursor: zoom-out; }
.stage[data-cursor="eyedropper"] { cursor: copy; }

.stage-note {
  position: absolute;
  left: 50%;
  top: 20px;
  z-index: 3;
  margin: 0;
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(5, 9, 17, 0.78);
  color: var(--muted);
  font-size: 12px;
  transform: translateX(-50%);
  pointer-events: none;
  transition: opacity 0.3s var(--ease);
}

.stage-note[data-hidden="true"] {
  opacity: 0;
}

.drop-hint {
  position: absolute;
  inset: 14px;
  z-index: 4;
  display: grid;
  place-items: center;
  border: 2px dashed rgba(103, 232, 249, 0.6);
  border-radius: 16px;
  background: rgba(4, 10, 20, 0.72);
  color: var(--cyan);
  font-size: 18px;
  font-weight: 700;
  pointer-events: none;
}

.text-editor {
  position: absolute;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px;
  border: 1px solid rgba(103, 232, 249, 0.45);
  border-radius: 10px;
  background: rgba(8, 14, 25, 0.96);
  box-shadow: var(--shadow-sm);
  transform: translateY(-50%);
}

.text-editor input {
  width: min(280px, 42vw);
  padding: 6px 9px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--bg-raised);
}

/* ---------- panels ---------- */

.panel-column {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-left: 1px solid var(--line);
  background: rgba(7, 12, 22, 0.9);
  overflow-y: auto;
  scrollbar-width: thin;
}

.panel {
  padding: 13px 14px 16px;
  border-bottom: 1px solid var(--line);
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 10px;
}

.panel-head h2 {
  margin: 0;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--muted);
}

.panel-note {
  margin: 0;
  color: var(--dim);
  font-size: 11.5px;
  text-align: right;
}

.button-row {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.button-row.compact {
  gap: 2px;
}

.color-row,
.opacity-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 9px;
  margin-bottom: 12px;
}

.blend-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 9px;
  margin-bottom: 12px;
}

.color-row label,
.opacity-row label,
.blend-row label {
  color: var(--muted);
  font-size: 12px;
}

.color-row input[type="color"] {
  width: 100%;
  height: 30px;
  padding: 2px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--bg-raised);
}

.color-row output,
.opacity-row output {
  color: var(--dim);
  font-size: 11.5px;
  min-width: 46px;
  text-align: right;
}

.options-group {
  display: grid;
  gap: 7px;
}

.field {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  color: var(--muted);
  font-size: 12px;
}

.field output {
  color: var(--cyan);
  font-family: var(--mono);
  font-size: 11px;
}

input[type="range"] {
  width: 100%;
  height: 20px;
  margin: 0;
  accent-color: var(--teal);
  cursor: pointer;
}

input[type="number"],
input[type="text"],
select {
  width: 100%;
  min-height: 32px;
  padding: 5px 9px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--bg-raised);
  color: var(--text);
}

input[type="number"]:focus,
input[type="text"]:focus,
select:focus {
  border-color: rgba(103, 232, 249, 0.6);
  outline: none;
}

.check {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 12px;
}

.check input {
  accent-color: var(--teal);
}

.layer-list {
  display: grid;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.layer-item {
  display: grid;
  grid-template-columns: auto 44px minmax(0, 1fr) auto;
  align-items: center;
  gap: 7px;
  padding: 5px 6px;
  border: 1px solid transparent;
  border-radius: 9px;
  background: rgba(13, 21, 36, 0.55);
}

.layer-item:hover {
  border-color: var(--line);
}

.layer-item[data-active="true"] {
  border-color: rgba(103, 232, 249, 0.4);
  background: linear-gradient(120deg, rgba(34, 211, 238, 0.1), rgba(167, 139, 250, 0.08));
}

.layer-visibility {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  padding: 0;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
}

.layer-visibility:hover {
  background: var(--panel-3);
  color: var(--text);
}

.layer-visibility[aria-pressed="false"] {
  color: var(--dim);
  opacity: 0.55;
}

.layer-thumb {
  width: 44px;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background-color: var(--checker-dark);
  background-image:
    linear-gradient(45deg, var(--checker-light) 25%, transparent 25%),
    linear-gradient(-45deg, var(--checker-light) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--checker-light) 75%),
    linear-gradient(-45deg, transparent 75%, var(--checker-light) 75%);
  background-size: 10px 10px;
  background-position: 0 0, 0 5px, 5px -5px, -5px 0;
  object-fit: contain;
}

.layer-name {
  overflow: hidden;
  padding: 2px 0;
  border: 0;
  background: transparent;
  color: var(--text);
  font-size: 12px;
  text-align: left;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.layer-name-input {
  min-height: 26px;
  padding: 2px 5px;
  font-size: 12px;
}

.layer-lock {
  display: grid;
  place-items: center;
  width: 18px;
  color: var(--dim);
}

.layer-lock svg {
  width: 13px;
  height: 13px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.layer-clip {
  display: grid;
  place-items: center;
  width: 16px;
  color: var(--accent, #67e8f9);
}

.layer-clip svg {
  width: 12px;
  height: 12px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.layer-item[data-clipped="true"] .layer-thumb {
  outline: 1px dashed currentColor;
  outline-offset: 1px;
}

.layer-item[data-locked="true"] .layer-name {
  color: var(--muted);
}

.document-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.histogram-panel {
  display: grid;
  gap: 6px;
  margin-bottom: 12px;
}

#histogram {
  width: 100%;
  height: 64px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background:
    linear-gradient(180deg, rgba(103, 232, 249, 0.04), rgba(103, 232, 249, 0)),
    var(--bg-raised);
}

.histogram-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.histogram-meta span {
  color: var(--dim);
  font-size: 11px;
}

.adjust-list {
  display: grid;
  gap: 5px;
}

.filter-grid {
  display: grid;
  gap: 6px;
}

.filter-grid .btn {
  justify-content: flex-start;
}

/* ---------- status bar ---------- */

.status-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 34px;
  padding: 4px 14px;
  border-top: 1px solid var(--line);
  background: rgba(5, 9, 16, 0.92);
  color: var(--dim);
  font-size: 11.5px;
}

.status-left,
.status-right {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
}

.status-left span,
.status-right span {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.status-divider {
  width: 1px;
  height: 12px;
  background: var(--line);
}

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

.status-autosave {
  color: var(--dim);
}

.status-autosave[data-tone="ok"] {
  color: var(--good);
}

.status-autosave[data-tone="error"] {
  color: var(--danger);
}

.mono {
  font-family: var(--mono);
}

/* ---------- dialogs ---------- */

.dialog {
  width: min(460px, calc(100vw - 32px));
  padding: 20px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  color: var(--text);
  box-shadow: var(--shadow-lg);
}

.dialog::backdrop {
  background: rgba(2, 5, 10, 0.72);
  backdrop-filter: blur(4px);
}

.dialog h2 {
  margin: 0 0 14px;
  font-size: 17px;
}

.dialog form {
  display: grid;
  gap: 10px;
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 6px;
}

.dialog-note {
  margin: 0;
  color: var(--dim);
  font-size: 11.5px;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.dialog .field {
  justify-content: flex-start;
  flex-direction: column;
  align-items: stretch;
  gap: 4px;
}

.radio-set {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 2px 0;
  padding: 0;
  border: 0;
}

.radio-set legend {
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 12px;
}

.radio-set label {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 12px;
}

.radio-set .inline input[type="color"] {
  width: 32px;
  height: 26px;
  padding: 1px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--bg-raised);
}

.anchor-fieldset {
  margin: 2px 0;
  padding: 0;
  border: 0;
}

.anchor-fieldset legend {
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 12px;
}

.anchor-grid {
  display: grid;
  grid-template-columns: repeat(3, 38px);
  gap: 6px;
}

.anchor-grid label {
  display: grid;
  place-items: center;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--bg-raised);
}

.anchor-grid label:has(input:checked) {
  border-color: rgba(103, 232, 249, 0.65);
  background: rgba(34, 211, 238, 0.12);
}

.shortcut-list {
  display: grid;
  gap: 7px;
  margin: 0 0 8px;
}

.shortcut-list div {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line);
}

.shortcut-list dt {
  color: var(--cyan);
  font-family: var(--mono);
  font-size: 11.5px;
}

.shortcut-list dd {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  text-align: right;
}

/* ---------- responsive ---------- */

@media (max-width: 980px) {
  .workspace {
    grid-template-columns: 48px minmax(0, 1fr) 250px;
  }

  .brand {
    min-width: 0;
  }

  .brand-text small {
    display: none;
  }

  .doc-name {
    width: min(180px, 24vw);
  }

  .file-actions .btn {
    padding: 0 8px;
    font-size: 11.5px;
  }

  #btn-open-project,
  #btn-save {
    display: none;
  }
}

@media (max-width: 760px) {
  .app {
    grid-template-rows: auto minmax(0, 1fr) auto;
  }

  .app-bar {
    flex-wrap: wrap;
    gap: 8px;
    padding: 8px 10px;
  }

  .brand-mark {
    display: none;
  }

  .brand-text strong {
    font-size: 14px;
  }

  .doc-meta {
    order: 3;
    flex-basis: 100%;
  }

  .doc-name {
    width: 100%;
  }

  .file-actions {
    margin-left: auto;
  }

  #btn-open-project,
  #btn-save,
  #btn-open {
    display: none;
  }

  .history-actions {
    padding-left: 4px;
  }

  .workspace {
    grid-template-columns: 44px minmax(0, 1fr);
    grid-template-rows: minmax(0, 1fr) 200px;
  }

  .tool-rail {
    grid-row: 1 / span 2;
    padding: 5px 3px;
  }

  .tool-btn {
    width: 34px;
    height: 34px;
  }

  .panel-column {
    grid-column: 2;
    grid-row: 2;
    flex-direction: row;
    overflow-x: auto;
    overflow-y: hidden;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .panel {
    flex: 0 0 250px;
    border-right: 1px solid var(--line);
    border-bottom: 0;
    overflow-y: auto;
  }

  .status-bar {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}