:root {
  --rpy-bg: #000000;
  --rpy-panel: #111111;
  --rpy-panel-deep: #090909;
  --rpy-text: #ffffff;
  --rpy-text-soft: #cfcfcf;
  --rpy-accent: #8f00ff;
  --rpy-border: #ffffff;
  --rpy-glow-violet-strong: rgba(143, 0, 255, 0.85);
  --rpy-glow-violet-full: rgba(143, 0, 255, 1);
  --rpy-glow-violet-soft: rgba(143, 0, 255, 0.35);
  --rpy-glow-white-soft: rgba(255, 255, 255, 0.08);
  --checker-light: #34293a;
  --checker-dark: #232326;
  --left-rail-width: 260px;
  --radius: 0;
  --radius-small: 0;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: monospace;
  color: var(--rpy-text);
  background:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(180deg, rgba(143, 0, 255, 0.08), transparent 18%, transparent 82%, rgba(143, 0, 255, 0.08)),
    var(--rpy-bg);
  background-size: 16px 16px, 16px 16px, auto, auto;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.03) 0,
    rgba(255, 255, 255, 0.03) 1px,
    transparent 1px,
    transparent 3px
  );
  opacity: 0.4;
}

button,
input,
select {
  font: inherit;
}

.app-body {
  padding: 16px;
}

.editor-shell {
  display: grid;
  gap: 16px;
  min-height: calc(100vh - 32px);
  max-width: 1500px;
  margin: 0 auto;
}

.topbar {
  display: grid;
  grid-template-columns: var(--left-rail-width) minmax(0, 1fr);
  position: relative;
  z-index: 50;
  height: 160px;
  border: 2px solid var(--rpy-border);
  background: var(--rpy-bg);
  box-shadow: 0 0 20px var(--rpy-glow-violet-soft);
  overflow: visible;
}

.topbar-logo,
.topbar-main,
.brand-block,
.menu-bar,
.title-block {
  position: relative;
  z-index: 1;
}

.topbar-logo {
  display: grid;
  place-items: center;
  height: 160px;
  padding: 14px;
  border-right: 2px solid var(--rpy-border);
  border-bottom: 2px solid var(--rpy-border);
}

.topbar-logo-image {
  display: block;
  width: auto;
  height: auto;
  max-width: 120px;
  max-height: 120px;
  object-fit: contain;
}

.topbar-main {
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  height: 160px;
  min-width: 0;
}

.topbar-intro {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 0;
  padding: 20px 24px 16px;
}

.brand-block h1,
.empty-card h2,
.modal-header h2 {
  margin: 0;
  font-family: "VT323", monospace;
  font-size: clamp(1.8rem, 2vw, 2.4rem);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--rpy-accent);
  font-family: "VT323", monospace;
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-shadow: 0 0 10px var(--rpy-glow-violet-strong);
}

.menu-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  min-width: 0;
  padding: 12px 18px;
  border-top: 2px solid var(--rpy-border);
  border-bottom: 2px solid var(--rpy-border);
  background: var(--rpy-panel-deep);
}

.menu-group {
  position: relative;
}

.menu-trigger,
.chip-button,
.tool-button,
.tool-action-button,
.frame-card,
.palette-cell,
.hero-button,
.ghost-button,
.dialog-close,
.menu-item {
  border: 1px solid var(--rpy-border);
  border-radius: 0;
  background: var(--rpy-bg);
  color: var(--rpy-text);
  transition: background 120ms steps(2), color 120ms steps(2), box-shadow 120ms steps(2), transform 120ms steps(2);
}

.menu-trigger,
.menu-item,
.chip-button,
.hero-button,
.ghost-button,
.dialog-close {
  cursor: pointer;
}

.menu-trigger:hover,
.menu-item:hover,
.chip-button:hover,
.tool-button:hover,
.tool-action-button:hover,
.frame-card:hover,
.hero-button:hover,
.ghost-button:hover,
.dialog-close:hover {
  background: var(--rpy-text);
  color: var(--rpy-bg);
  box-shadow: 0 0 14px var(--rpy-glow-violet-strong);
}

.menu-trigger,
.chip-button,
.hero-button,
.ghost-button {
  padding: 8px 12px;
}

.hero-button {
  background: var(--rpy-text);
  color: var(--rpy-bg);
  text-transform: uppercase;
}

.ghost-button {
  text-transform: uppercase;
}

.menu-panel {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  display: none;
  min-width: 220px;
  padding: 8px;
  border: 2px solid var(--rpy-border);
  background: var(--rpy-panel-deep);
  box-shadow: 0 0 16px var(--rpy-glow-violet-soft);
  z-index: 100;
}

.menu-group.is-open .menu-panel {
  display: grid;
  gap: 8px;
}

.menu-item {
  padding: 8px 10px;
  text-align: left;
  text-transform: uppercase;
}

.title-block {
  text-align: right;
  max-width: 440px;
}

.document-title,
.document-subtitle {
  margin: 0;
}

.document-title {
  font-weight: 700;
  text-transform: uppercase;
}

.document-subtitle {
  margin-top: 6px;
  color: var(--rpy-text-soft);
}

.workspace {
  display: grid;
  grid-template-columns: var(--left-rail-width) minmax(0, 1fr) 320px;
  gap: 16px;
  min-height: 0;
}

.workspace > * {
  min-width: 0;
}

.panel,
.preview-panel,
.frames-dock {
  border: 2px solid var(--rpy-border);
  background: var(--rpy-panel);
  box-shadow: 0 0 14px var(--rpy-glow-white-soft);
}

.panel {
  display: grid;
  grid-auto-rows: max-content;
  align-content: start;
  gap: 16px;
  padding: 16px;
}

.panel-section {
  display: grid;
  align-content: start;
  gap: 12px;
}

.panel-heading-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.panel-heading {
  margin: 0;
  color: var(--rpy-text);
  font-size: 0.95rem;
  text-transform: uppercase;
}

.tool-list,
.tool-action-list {
  display: grid;
  gap: 8px;
}

.tool-button,
.tool-action-button {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  align-items: stretch;
  width: 100%;
  min-height: 37.58px;
  height: 37.58px;
  padding: 0;
}

.button-icon-shell {
  display: grid;
  place-items: center;
  width: 48px;
  height: 100%;
  border-right: 1px solid var(--rpy-border);
  background: rgba(255, 255, 255, 0.03);
}

.button-icon-image {
  display: block;
  width: 32px;
  height: 32px;
  object-fit: contain;
  filter: brightness(0) invert(1);
}

.button-icon-image.is-flipped-horizontal {
  transform: scaleX(-1);
}

.tool-button:hover .button-icon-image,
.tool-action-button:hover .button-icon-image,
.tool-button:focus-visible .button-icon-image,
.tool-action-button:focus-visible .button-icon-image {
  filter: brightness(0) invert(0);
}

.button-icon-shell.is-placeholder {
  background:
    linear-gradient(45deg, transparent calc(50% - 1px), var(--rpy-border) calc(50% - 1px), var(--rpy-border) calc(50% + 1px), transparent calc(50% + 1px)),
    linear-gradient(-45deg, transparent calc(50% - 1px), var(--rpy-border) calc(50% - 1px), var(--rpy-border) calc(50% + 1px), transparent calc(50% + 1px));
  background-color: rgba(255, 255, 255, 0.03);
}

.button-icon-placeholder {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  color: var(--rpy-text-soft);
  font-family: "VT323", monospace;
  font-size: 1.3rem;
}

.button-copy {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-width: 0;
  height: 100%;
  padding: 0 12px;
}

.button-copy > span:first-child {
  min-width: 0;
}

.tool-button small {
  color: var(--rpy-text-soft);
}

.tool-button.is-active,
.tool-action-button.is-active,
.chip-button.is-active,
.frame-card.is-selected {
  box-shadow: inset 0 0 0 2px var(--rpy-accent), 0 0 16px var(--rpy-glow-violet-strong);
  color: var(--rpy-text);
}

.preview-panel {
  min-width: 0;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  overflow: hidden;
  background: var(--rpy-panel-deep);
}

.preview-toolbar,
.frames-toolbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  padding: 12px 16px;
  border-bottom: 2px solid var(--rpy-border);
  background: var(--rpy-bg);
}

.toolbar-cluster {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.canvas-stage {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 360px;
  padding: 24px;
  background:
    linear-gradient(45deg, var(--checker-dark) 25%, transparent 25%, transparent 75%, var(--checker-dark) 75%, var(--checker-dark)),
    linear-gradient(45deg, var(--checker-dark) 25%, transparent 25%, transparent 75%, var(--checker-dark) 75%, var(--checker-dark));
  background-color: var(--checker-light);
  background-position: 0 0, 14px 14px;
  background-size: 28px 28px;
}

.canvas-stage::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  box-shadow: inset 0 0 24px rgba(0, 0, 0, 0.8);
}

.canvas-stage.is-empty {
  place-items: stretch;
}

.sprite-canvas {
  position: relative;
  z-index: 1;
  image-rendering: pixelated;
  border: 2px solid var(--rpy-border);
  background: #000;
  box-shadow: 0 0 18px var(--rpy-glow-violet-soft);
}

.empty-state {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 16px;
}

.empty-state[hidden] {
  display: none !important;
}

.empty-card {
  position: relative;
  z-index: 1;
  max-width: 560px;
  padding: 16px;
  border: 2px solid var(--rpy-border);
  background: var(--rpy-bg);
  box-shadow: 0 0 20px var(--rpy-glow-violet-strong);
}

.empty-card p:last-of-type {
  color: var(--rpy-text-soft);
  line-height: 1.6;
}

.empty-actions,
.modal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.status-bar {
  padding: 12px 16px;
  border-top: 2px solid var(--rpy-border);
  color: var(--rpy-text-soft);
  background: var(--rpy-bg);
}

.current-color {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 12px;
  align-items: center;
}

.current-color-swatch {
  width: 58px;
  height: 58px;
  border: 2px solid var(--rpy-border);
  background: linear-gradient(135deg, #000 0 50%, #7e2553 50% 100%);
}

.current-color-meta {
  display: grid;
  gap: 4px;
}

.current-color-meta span {
  color: var(--rpy-text-soft);
}

.palette-grid {
  display: grid;
  grid-template-columns: repeat(16, minmax(0, 1fr));
  gap: 4px;
}

.palette-cell {
  width: 100%;
  aspect-ratio: 1;
  padding: 0;
  border: none;
}

.palette-cell.is-selected {
  outline: 2px solid var(--rpy-accent);
  outline-offset: 2px;
  box-shadow: 0 0 10px var(--rpy-glow-violet-strong);
}

.details-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px 12px;
  margin: 0;
}

.details-grid dt {
  font-weight: 700;
  color: var(--rpy-text);
}

.details-grid dd {
  margin: 0;
  color: var(--rpy-text-soft);
}

.frames-dock {
  overflow: hidden;
}

.frame-strip {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding: 16px;
}

.frame-card {
  min-width: 116px;
  padding: 12px;
  display: grid;
  gap: 10px;
}

.frame-card-canvas-shell {
  position: relative;
  width: 88px;
  height: 88px;
  justify-self: center;
  overflow: hidden;
  border: 2px solid var(--rpy-border);
  background:
    linear-gradient(45deg, var(--checker-dark) 25%, transparent 25%, transparent 75%, var(--checker-dark) 75%, var(--checker-dark)),
    linear-gradient(-45deg, var(--checker-dark) 25%, transparent 25%, transparent 75%, var(--checker-dark) 75%, var(--checker-dark));
  background-color: var(--checker-light);
  background-position: 0 0, 8px 8px;
  background-size: 16px 16px;
}

.frame-card-canvas {
  width: 88px;
  height: 88px;
  display: block;
  background: transparent;
  image-rendering: pixelated;
}

.frame-card-label {
  color: var(--rpy-text-soft);
  text-align: center;
  text-transform: uppercase;
}

.frames-empty {
  margin: 0;
  padding: 16px;
  color: var(--rpy-text-soft);
}

.modal-dialog {
  border: none;
  padding: 0;
  background: transparent;
}

.modal-dialog::backdrop {
  background: rgba(0, 0, 0, 0.88);
}

.modal-card {
  min-width: min(560px, calc(100vw - 32px));
  padding: 16px;
  border: 2px solid var(--rpy-border);
  background: var(--rpy-panel-deep);
  box-shadow: 0 0 22px var(--rpy-glow-violet-strong);
}

.modal-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 12px;
}

.dialog-close {
  width: 42px;
  height: 42px;
  padding: 0;
  font-size: 1.25rem;
}

.modal-copy {
  color: var(--rpy-text-soft);
  line-height: 1.6;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.field {
  display: grid;
  gap: 8px;
}

.field-wide {
  grid-column: 1 / -1;
}

.field input,
.field select {
  width: 100%;
  padding: 10px 12px;
  border: 2px solid var(--rpy-border);
  color: var(--rpy-text);
  background: var(--rpy-bg);
}

.dialog-error {
  min-height: 1.25rem;
  color: #ff77a8;
}

.help-list {
  display: grid;
  gap: 10px;
  padding-left: 20px;
  color: var(--rpy-text-soft);
  line-height: 1.55;
}

a {
  color: var(--rpy-text);
  background: rgba(143, 0, 255, 0.35);
  padding: 0 0.2rem;
  text-decoration: none;
}

a:hover {
  background: rgba(143, 0, 255, 0.6);
  box-shadow: 0 0 8px rgba(143, 0, 255, 0.65);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
  box-shadow: none;
}

.menu-trigger:focus-visible,
.menu-item:focus-visible,
.chip-button:focus-visible,
.tool-button:focus-visible,
.tool-action-button:focus-visible,
.frame-card:focus-visible,
.palette-cell:focus-visible,
.hero-button:focus-visible,
.ghost-button:focus-visible,
.dialog-close:focus-visible,
.field input:focus-visible,
.field select:focus-visible {
  outline: 2px solid var(--rpy-accent);
  outline-offset: 2px;
  box-shadow: 0 0 12px var(--rpy-glow-violet-strong);
}

@media (max-width: 1200px) {
  .workspace {
    grid-template-columns: 1fr;
  }

  .left-panel,
  .right-panel {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 980px) {
  .topbar {
    height: auto;
  }

  .topbar-logo,
  .topbar-main {
    height: auto;
  }

  .topbar-logo {
    min-height: 160px;
  }

  .topbar-intro {
    align-items: flex-start;
    flex-direction: column;
  }

  .title-block {
    text-align: left;
    max-width: none;
  }
}

@media (max-width: 760px) {
  .app-body {
    padding: 10px;
  }

  .topbar {
    grid-template-columns: 1fr;
    height: auto;
  }

  .topbar-logo {
    height: 160px;
    border-right: none;
    border-bottom: 2px solid var(--rpy-border);
  }

  .topbar-main {
    height: auto;
  }

  .topbar-intro {
    flex-direction: column;
    align-items: flex-start;
    padding: 16px;
  }

  .title-block {
    text-align: left;
    max-width: none;
  }

  .left-panel,
  .right-panel,
  .field-grid {
    grid-template-columns: 1fr;
  }

  .canvas-stage {
    min-height: 280px;
    padding: 16px;
  }

  .empty-card,
  .modal-card {
    padding: 16px;
  }

  .menu-bar {
    padding: 10px 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}