:root {
  color-scheme: dark;
  font-family: 'Segoe UI', Roboto, sans-serif;
  --toolbar-height: 56px;
  --toolbar-bg: #1a1a1a;
  --toolbar-border: #2f2f2f;
  --toolbar-accent: #8ab4f8;
  --icon-button-bg: #292929;
  --icon-button-border: #3a3a3a;
  --icon-button-hover: #353535;
  --panel-bg: rgba(20, 20, 20, 0.96);
}

body {
  margin: 0;
  background-color: #222;
  color: #fff;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

input,
button {
  font-family: inherit;
}

.toolbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.5rem 0.75rem;
  height: var(--toolbar-height);
  background: var(--toolbar-bg);
  border-bottom: 1px solid var(--toolbar-border);
}

.toolbar-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  min-width: 0;
}

.brand-logo {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  display: block;
}

.brand-name {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.version-info {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.25rem 0.5rem;
  border-radius: 999px;
  background: #252525;
  color: #9aa0a6;
  font-size: 0.75rem;
  font-family: 'Courier New', monospace;
  border: 1px solid #333;
}

.toolbar-actions {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
  min-width: 0;
}

.toolbar-buttons {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.toolbar-dimensions {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.toolbar-dimensions input[type="number"] {
  width: 80px;
  padding: 0.35rem 0.5rem;
  background: #2b2b2b;
  color: #f5f5f5;
  border: 1px solid #3b3b3b;
  border-radius: 6px;
  font-size: 0.9rem;
}

.toolbar-meta {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.toolbar-meta input[type="text"] {
  width: 200px;
  padding: 0.35rem 0.5rem;
  background: #2b2b2b;
  color: #f5f5f5;
  border: 1px solid #3b3b3b;
  border-radius: 6px;
  font-size: 0.9rem;
}

.canvas-version {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.25rem 0.5rem;
  border-radius: 999px;
  background: #252525;
  color: #9aa0a6;
  font-size: 0.85rem;
  font-family: 'Courier New', monospace;
  border: 1px solid #333;
  min-width: 36px;
  text-align: center;
}

.toolbar-dimensions input[type="number"]:focus-visible {
  outline: 2px solid var(--toolbar-accent);
  outline-offset: 1px;
  border-color: var(--toolbar-accent);
}

.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--icon-button-bg);
  border: 1px solid var(--icon-button-border);
  color: #f4f4f4;
  transition: background 150ms ease, border-color 150ms ease, color 150ms ease, transform 150ms ease;
}

.icon-button svg {
  width: 18px;
  height: 18px;
}

.icon-button:hover:not(:disabled),
.icon-button:focus-visible:not(:disabled) {
  background: var(--icon-button-hover);
  border-color: var(--toolbar-accent);
  color: var(--toolbar-accent);
  outline: none;
}

.icon-button:active:not(:disabled) {
  transform: scale(0.95);
}

.icon-button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.icon-button--ghost {
  background: transparent;
  border-color: transparent;
  color: #d0d0d0;
}

.icon-button--ghost:hover,
.icon-button--ghost:focus-visible {
  background: rgba(255, 255, 255, 0.06);
  color: #ffffff;
  border-color: transparent;
  outline: none;
}

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

.toolbar-feedback {
  min-width: 140px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--toolbar-accent);
  text-align: right;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.toolbar-feedback:empty {
  display: none;
}

.toolbar-feedback[data-state="success"] {
  color: #9dd16a;
}

.toolbar-feedback[data-state="error"] {
  color: #ff8a80;
}

.toolbar-feedback[data-state="info"] {
  color: var(--toolbar-accent);
}

.workspace {
  flex: 1;
  min-height: 0;
  display: flex;
  justify-content: center;
  align-items: stretch;
}

.canvas-wrapper {
  flex: 1;
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
  padding: 1.5rem;
  overflow: auto;
  min-width: 0;
}

.canvas-wrapper--centered {
  justify-content: center;
}

.canvas-inner {
  position: relative;
  flex: 0 0 auto;
  display: inline-block;
  min-width: max-content;
  min-height: max-content;
}


.zoom-overlay {
  position: fixed;
  top: calc(var(--toolbar-height) + 1rem);
  right: 1.5rem;
  z-index: 45;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.6rem;
  border-radius: 999px;
  background: rgba(18, 18, 18, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(6px);
}

.zoom-button {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(36, 36, 36, 0.65);
  color: #f5f5f5;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
  backdrop-filter: blur(4px);
  cursor: pointer;
  transition: background-color 120ms ease, border-color 120ms ease, color 120ms ease,
    box-shadow 120ms ease;
}

.zoom-button__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.zoom-button__icon svg {
  width: 18px;
  height: 18px;
  display: block;
}

.zoom-button:hover,
.zoom-button:focus-visible {
  background: rgba(52, 52, 52, 0.85);
  border-color: var(--toolbar-accent);
  color: var(--toolbar-accent);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.35);
}

.zoom-button:focus-visible {
  outline: none;
}

.zoom-button.is-active {
  border-color: var(--toolbar-accent);
  color: var(--toolbar-accent);
}

.zoom-button:disabled {
  opacity: 0.4;
  pointer-events: none;
  box-shadow: none;
}

.zoom-overlay__indicator {
  min-width: 64px;
  text-align: center;
  font-variant-numeric: tabular-nums;
  font-size: 0.85rem;
  font-weight: 600;
  color: #f5f5f5;
}

#led-canvas {
  display: block;
  background: #111;
  border: 1px solid #555;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.6);
  cursor: crosshair;
}

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

.property-panel {
  position: fixed;
  right: 0;
  top: var(--toolbar-height);
  bottom: 0;
  width: 300px;
  max-width: min(90vw, 360px);
  background: var(--panel-bg);
  border-left: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: -12px 0 24px rgba(0, 0, 0, 0.45);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.25rem;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform 200ms ease;
  pointer-events: none;
  z-index: 40;
}

.property-panel.is-open {
  transform: translateX(0);
  pointer-events: auto;
}

.property-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.25rem;
}

.property-panel h2 {
  margin: 0;
  font-size: 1.05rem;
}

.property-panel input {
  background: #2d2d2d;
  border: 1px solid #444;
  border-radius: 6px;
  color: #fff;
  padding: 0.45rem 0.5rem;
}

.property-panel input:focus-visible {
  outline: 2px solid var(--toolbar-accent);
  outline-offset: 1px;
}

.property-panel input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

label {
  font-size: 0.9rem;
  color: #ddd;
}

.panel-message {
  margin: 0 0 0.5rem;
  font-size: 0.9rem;
  color: #ccc;
}

.panel-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.panel-actions button {
  flex: 1;
  background: #2d2d2d;
  border: 1px solid #444;
  border-radius: 6px;
  color: #fff;
  padding: 0.45rem 0.75rem;
  transition: background 120ms ease, border-color 120ms ease;
}

.panel-actions button:hover:not(:disabled),
.panel-actions button:focus-visible:not(:disabled) {
  background: #353535;
  border-color: var(--toolbar-accent);
  outline: none;
}

.panel-actions button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.property-panel.panel-empty {
  color: #aaa;
}

.property-panel.panel-empty label,
.property-panel.panel-empty input {
  opacity: 0.5;
}

.color-history {
  margin-top: 0.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.color-history-title {
  font-size: 0.8rem;
  color: #bbb;
}

.color-history-swatches {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.color-history[data-empty="true"] .color-history-swatches::before {
  content: 'Noch keine Farben';
  font-size: 0.75rem;
  color: #777;
}

.issues-panel {
  position: fixed;
  top: var(--toolbar-height);
  right: 1.5rem;
  width: min(420px, 92vw);
  max-height: calc(100vh - var(--toolbar-height) - 3rem);
  padding: 1.1rem 1.25rem 1.25rem;
  background: var(--panel-bg);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.35);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  z-index: 45;
  backdrop-filter: blur(12px);
  transform: translateY(-16px);
  opacity: 0;
  pointer-events: none;
  transition: transform 200ms ease, opacity 180ms ease;
}

.issues-panel.is-open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.issues-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.issues-panel h3 {
  margin: 0;
  font-size: 1rem;
}

.issues-panel-actions {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.issues-panel-actions .icon-button {
  width: 36px;
  height: 36px;
  padding: 0;
}

.issues-panel-actions .icon-button svg {
  width: 20px;
  height: 20px;
}

.issues-panel button {
  background: #2d2d2d;
  border: 1px solid #444;
  border-radius: 6px;
  color: #fff;
  padding: 0.4rem 0.75rem;
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease;
}

.issues-panel button:hover:not(:disabled),
.issues-panel button:focus-visible:not(:disabled) {
  background: #353535;
  border-color: var(--toolbar-accent);
  outline: none;
}

.issues-panel button:disabled {
  opacity: 0.6;
  cursor: progress;
}

.issues-feedback {
  margin: 0;
  font-size: 0.85rem;
  min-height: 1.2rem;
  color: #9aa0a6;
}

.issues-feedback[hidden] {
  display: none;
}

.issues-feedback[data-state="error"] {
  color: #ff8a80;
}

.issues-feedback[data-state="success"] {
  color: #9dd16a;
}

.issues-feedback[data-state="info"] {
  color: var(--toolbar-accent);
}

.issues-list {
  margin: 0;
  padding-left: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  overflow-y: auto;
  flex: 1;
  position: relative;
}

.issues-loading-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(17, 17, 17, 0.8);
  backdrop-filter: blur(2px);
  border-radius: 10px;
  z-index: 2;
}

.issues-loading-overlay[hidden] {
  display: none;
}

.issues-loading-spinner {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 4px solid rgba(255, 255, 255, 0.15);
  border-top-color: var(--toolbar-accent);
  animation: issues-spin 1s linear infinite;
}

@keyframes issues-spin {
  to {
    transform: rotate(360deg);
  }
}

.issues-list li {
  font-size: 0.9rem;
  color: #dcdcdc;
}

.issues-item-button {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  color: #e6e6e6;
  padding: 0.6rem 0.65rem;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.35rem;
  font-size: 0.9rem;
  transition: background 140ms ease, color 140ms ease;
}

.issues-item-button:hover,
.issues-item-button:focus-visible {
  background: rgba(138, 180, 248, 0.12);
  color: #fff;
  outline: none;
}

.issues-item-title {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.issues-item-title svg {
  flex-shrink: 0;
}

.issues-item-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  font-size: 0.78rem;
  color: #b0b0b0;
}

.issues-labels {
  font-size: 0.75rem;
  color: #9ca3af;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.issues-form {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.issues-form input,
.issues-form textarea {
  background: #2d2d2d;
  border: 1px solid #444;
  border-radius: 6px;
  color: #fff;
  padding: 0.45rem 0.5rem;
  font-family: inherit;
}

.issues-form textarea {
  resize: vertical;
  min-height: 80px;
  max-height: 220px;
}

.issues-form input:focus-visible,
.issues-form textarea:focus-visible {
  outline: 2px solid var(--toolbar-accent);
  outline-offset: 1px;
}

.issues-form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.issues-form-actions .button {
  min-width: 120px;
}

@media (max-width: 960px) {
  .issues-panel {
    width: min(520px, 95vw);
    right: 50%;
    transform: translate(50%, -16px);
  }
}

@media (max-width: 640px) {
  .issues-panel {
    top: calc(var(--toolbar-height) + 0.75rem);
    right: 50%;
    transform: translate(50%, -16px);
    padding: 0.9rem 1rem 1.1rem;
  }
}

.color-swatch {
  width: 24px;
  height: 24px;
  padding: 0;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  cursor: pointer;
  position: relative;
  background: transparent;
}

.color-swatch::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 6px;
  border: 2px solid transparent;
}

.color-swatch.is-active::after {
  border-color: rgba(255, 255, 255, 0.9);
}

.color-swatch.is-disabled {
  cursor: not-allowed;
  opacity: 0.4;
}

.context-menu {
  position: fixed;
  display: flex;
  flex-direction: column;
  background: #1a1a1a;
  border: 1px solid #444;
  border-radius: 6px;
  padding: 0.25rem;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.45);
  z-index: 60;
  min-width: 160px;
}

.context-menu[hidden] {
  display: none;
}

.context-menu button {
  width: 100%;
  background: transparent;
  border: none;
  text-align: left;
  padding: 0.45rem 0.75rem;
  border-radius: 4px;
  color: #f0f0f0;
}

.context-menu button:hover,
.context-menu button:focus {
  background: rgba(138, 180, 248, 0.12);
  outline: none;
}

.context-menu button:disabled {
  color: #666;
  cursor: not-allowed;
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal-overlay[hidden] {
  display: none;
}

.modal-dialog {
  width: min(92vw, 440px);
  background: #1a1a1a;
  border: 1px solid #333;
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
}

.modal-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 1rem 1rem 0.25rem 1rem;
}

.modal-title {
  margin: 0;
  font-size: 1.05rem;
}

.modal-icon {
  width: 28px;
  height: 28px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(138, 180, 248, 0.15);
  color: #8ab4f8;
}

.modal-body {
  padding: 0.25rem 1rem 1rem 1rem;
}

.modal-message {
  margin: 0.25rem 0 0 0;
  color: #e0e0e0;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  padding: 0.75rem 1rem 1rem 1rem;
}

.button {
  background: #2d2d2d;
  color: #fff;
  border: 1px solid #444;
  border-radius: 8px;
  padding: 0.5rem 0.9rem;
}

.button:hover,
.button:focus-visible {
  background: #353535;
  border-color: var(--toolbar-accent);
}

.button--ghost {
  background: transparent;
  color: #d0d0d0;
  border-color: transparent;
}

.button--ghost:hover,
.button--ghost:focus-visible {
  background: rgba(255, 255, 255, 0.06);
}

/* Tooltips */
[data-tooltip] {
  position: relative;
}

[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(-4px);
  background: #111;
  color: #eaeaea;
  border: 1px solid #2f2f2f;
  padding: 6px 8px;
  font-size: 12px;
  line-height: 1;
  white-space: nowrap;
  border-radius: 6px;
  z-index: 70;
  box-shadow: 0 10px 30px rgba(0,0,0,0.55), 0 2px 8px rgba(0,0,0,0.35);
  opacity: 0;
  pointer-events: none;
  transition: opacity 140ms ease, transform 160ms ease;
}

[data-tooltip]::before {
  content: '';
  position: absolute;
  top: calc(100% + 4px);
  left: 50%;
  transform: translateX(-50%) translateY(-4px) rotate(45deg);
  width: 8px;
  height: 8px;
  background: #111;
  border-right: 1px solid #2f2f2f;
  border-bottom: 1px solid #2f2f2f;
  transform-origin: center;
  z-index: 69;
  opacity: 0;
  pointer-events: none;
  transition: opacity 140ms ease, transform 160ms ease;
}

[data-tooltip]:hover::after,
[data-tooltip]:focus-visible::after {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

[data-tooltip]:hover::before,
[data-tooltip]:focus-visible::before {
  opacity: 1;
  transform: translateX(-50%) translateY(0) rotate(45deg);
}