:root {
  --lab-max-width: max(1200px, calc(100vw - (var(--lab-content-padding) * 2)));
  --lab-content-padding: min(4vw, 48px);
  --lab-card-radius: 22px;
  --lab-card-shadow: 0 20px 48px rgba(15, 30, 39, 0.12);
  --lab-card-border: rgba(76, 175, 80, 0.16);
  --lab-surface: #ffffff;
  --lab-muted: #2d3e2d;
  --lab-muted-soft: #4c6651;
  --lab-divider: rgba(45, 62, 45, 0.12);
  --lab-gradient-start: #f7fcf7;
  --lab-gradient-end: #eef7ee;
  --lab-hero-surface: linear-gradient(135deg, rgba(76, 175, 80, 0.16), rgba(45, 62, 45, 0.08));
  --lab-btn-primary: #4caf50;
  --lab-btn-primary-hover: #43a047;
  --lab-btn-text: #ffffff;
  --lab-btn-ghost-bg: #ffffff;
  --lab-btn-ghost-border: rgba(76, 175, 80, 0.24);
  --lab-btn-ghost-hover: #f4fbf4;
  --lab-btn-ghost-text: #1b4332;
  --lab-btn-link: #2d3e2d;
  --lab-btn-link-hover: #1b4332;
  --lab-status-info: rgba(76, 175, 80, 0.14);
  --lab-status-text: #1b4332;
  --lab-status-error: rgba(239, 68, 68, 0.14);
  --lab-status-error-text: #7f1d1d;
  --lab-placeholder-border: rgba(76, 175, 80, 0.45);
  --lab-placeholder-dash: rgba(76, 175, 80, 0.32);
  --lab-placeholder-bg: #ffffff;
  --lab-control-bg: rgba(255, 255, 255, 0.9);
  --lab-control-border: rgba(76, 175, 80, 0.18);
  --lab-control-shadow: 0 14px 32px rgba(27, 67, 50, 0.14);
  --lab-control-hover: rgba(244, 251, 244, 0.95);
  --lab-control-text: #1b4332;
  --lab-control-danger-bg: rgba(254, 228, 228, 0.95);
  --lab-control-danger-border: rgba(239, 68, 68, 0.28);
  --lab-control-danger-hover: rgba(254, 215, 215, 0.98);
  --lab-control-danger-text: #b91c1c;
}

:root[data-theme='dark'] {
  --lab-card-shadow: 0 30px 68px rgba(1, 6, 12, 0.6);
  --lab-card-border: rgba(107, 219, 165, 0.32);
  --lab-surface: rgba(8, 20, 33, 0.92);
  --lab-muted: #d4f6e7;
  --lab-muted-soft: #aee6ca;
  --lab-divider: rgba(107, 219, 165, 0.24);
  --lab-gradient-start: rgba(8, 20, 33, 0.95);
  --lab-gradient-end: rgba(12, 28, 44, 0.95);
  --lab-hero-surface: linear-gradient(135deg, rgba(107, 219, 165, 0.16), rgba(8, 20, 33, 0.86));
  --lab-btn-primary: #6bdba5;
  --lab-btn-primary-hover: #5acb96;
  --lab-btn-text: #04121e;
  --lab-btn-ghost-bg: rgba(8, 20, 33, 0.95);
  --lab-btn-ghost-border: rgba(107, 219, 165, 0.32);
  --lab-btn-ghost-hover: rgba(10, 27, 40, 0.96);
  --lab-btn-ghost-text: #d4f6e7;
  --lab-btn-link: #aee6ca;
  --lab-btn-link-hover: #c7f3dc;
  --lab-status-info: rgba(107, 219, 165, 0.18);
  --lab-status-text: #d4f6e7;
  --lab-status-error: rgba(239, 68, 68, 0.22);
  --lab-status-error-text: #fbd0d0;
  --lab-placeholder-border: rgba(107, 219, 165, 0.38);
  --lab-placeholder-dash: rgba(107, 219, 165, 0.26);
  --lab-placeholder-bg: rgba(8, 20, 33, 0.92);
  --lab-control-bg: rgba(6, 17, 29, 0.9);
  --lab-control-border: rgba(107, 219, 165, 0.32);
  --lab-control-shadow: 0 18px 36px rgba(1, 6, 12, 0.55);
  --lab-control-hover: rgba(12, 28, 44, 0.95);
  --lab-control-text: #e3f8ef;
  --lab-control-danger-bg: rgba(64, 12, 12, 0.85);
  --lab-control-danger-border: rgba(239, 68, 68, 0.38);
  --lab-control-danger-hover: rgba(89, 18, 18, 0.88);
  --lab-control-danger-text: #fbd0d0;
}

body {
  font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: radial-gradient(circle at top right, rgba(76, 175, 80, 0.08), transparent 55%),
    var(--lp-color-background);
  color: var(--lp-color-text-primary);
  min-height: 100vh;
  margin: 0;
}

.lab-header {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

.lab-main {
  max-width: var(--lab-max-width);
  margin: 0 auto;
  padding: calc(var(--lp-nav-height) + 32px) var(--lab-content-padding) 120px;
  display: flex;
  flex-direction: column;
  gap: 72px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  grid-template-areas:
    'body preview'
    'prompt preview';
  gap: 36px;
  background: var(--lab-hero-surface);
  padding: 40px;
  border-radius: var(--lab-card-radius);
  border: 1px solid var(--lab-card-border);
  box-shadow: var(--lab-card-shadow);
}

.hero__body {
  grid-area: body;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.hero__preview {
  grid-area: preview;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.hero__prompt {
  grid-area: prompt;
  display: flex;
  flex-direction: column;
}

.hero__body h1 {
  font-size: clamp(2.25rem, 3.1vw + 1rem, 3rem);
  line-height: 1.1;
}

.hero__callout {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  align-self: flex-start;
  background: rgba(255, 255, 255, 0.76);
  border-radius: 999px;
  padding: 10px 18px;
  color: var(--lab-muted-soft);
  font-weight: 600;
  letter-spacing: 0.01em;
  box-shadow: 0 12px 26px rgba(31, 78, 47, 0.12);
  margin-top: 8px;
}

.hero__preview {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.btn {
  border-radius: 999px;
  border: none;
  font-weight: 600;
  padding: 12px 24px;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn--primary {
  background: linear-gradient(135deg, var(--lab-btn-primary), var(--lab-btn-primary-hover));
  color: var(--lab-btn-text);
  box-shadow: 0 12px 32px rgba(76, 175, 80, 0.28);
}

.btn--primary:not(:disabled):hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 38px rgba(76, 175, 80, 0.3);
}

.btn--control {
  border-radius: 14px;
  background: var(--lab-control-bg);
  border: 1px solid var(--lab-control-border);
  color: var(--lab-control-text);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7);
}

.btn--control:not(:disabled):hover {
  background: var(--lab-control-hover);
  border-color: rgba(76, 175, 80, 0.32);
  transform: translateY(-1px);
  box-shadow: 0 12px 22px rgba(27, 67, 50, 0.12);
}

.btn--control:focus-visible {
  outline: 3px solid rgba(76, 175, 80, 0.28);
  outline-offset: 2px;
}

.btn--control.btn--control-danger {
  background: var(--lab-control-danger-bg);
  border-color: var(--lab-control-danger-border);
  color: var(--lab-control-danger-text);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.btn--control.btn--control-danger:not(:disabled):hover {
  background: var(--lab-control-danger-hover);
  border-color: rgba(239, 68, 68, 0.35);
  box-shadow: 0 12px 22px rgba(239, 68, 68, 0.18);
}

.btn--control.btn--control-danger:focus-visible {
  outline-color: rgba(239, 68, 68, 0.38);
}

.btn--ghost {
  background: var(--lab-btn-ghost-bg);
  border: 1px solid var(--lab-btn-ghost-border);
  color: var(--lab-btn-ghost-text);
}

.btn--ghost:not(:disabled):hover {
  background: var(--lab-btn-ghost-hover);
}

.btn--link {
  background: transparent;
  color: var(--lab-btn-link);
  padding-left: 0;
  padding-right: 0;
}

.btn--link:not(:disabled):hover {
  color: var(--lab-btn-link-hover);
}

.prompt-card--hero,
.preview-card {
  background: var(--lab-surface);
  border-radius: var(--lab-card-radius);
  border: 1px solid var(--lab-card-border);
  box-shadow: var(--lab-card-shadow);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

html[data-theme='dark'] .prompt-card--hero,
html[data-theme='dark'] .preview-card {
  color: var(--lp-color-text-primary);
}

html[data-theme='dark'] .prompt-card--hero header p,
html[data-theme='dark'] .preview-card header p,
html[data-theme='dark'] .prompt-card__field {
  color: var(--lab-muted);
}

.prompt-card--hero {
  max-width: 520px;
}

.preview-card header h2 {
  font-size: 1.35rem;
  margin-bottom: 6px;
}

.preview-card header p {
  color: var(--lab-muted-soft);
  font-size: 0.95rem;
}

.prompt-card__field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.95rem;
  color: var(--lab-muted-soft);
}

.prompt-card__field textarea,
.prompt-card__field select {
  border-radius: 14px;
  border: 1px solid rgba(76, 175, 80, 0.22);
  padding: 12px 14px;
  font-size: 1rem;
  font-family: inherit;
  resize: vertical;
  background: rgba(255, 255, 255, 0.95);
  color: var(--lp-color-text-primary);
}

html[data-theme='dark'] .prompt-card__field textarea,
html[data-theme='dark'] .prompt-card__field select {
  border: 1px solid rgba(107, 219, 165, 0.4);
  background: rgba(6, 17, 29, 0.92);
  color: var(--lp-color-text-primary);
}

html[data-theme='dark'] .prompt-card__field textarea::placeholder,
html[data-theme='dark'] .prompt-card__field select::placeholder {
  color: var(--lab-muted-soft);
}

.prompt-card__options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
}

.status {
  min-height: 28px;
  font-size: 0.9rem;
  color: var(--lab-status-text);
  align-self: stretch;
  width: 100%;
  box-sizing: border-box;
  text-align: center;
}

.status--info {
  background: var(--lab-status-info);
  border-radius: 14px;
  padding: 12px 14px;
}

.status--error {
  background: var(--lab-status-error);
  color: var(--lab-status-error-text);
  border-radius: 14px;
  padding: 12px 14px;
}

.preview-stage {
  position: relative;
  background: linear-gradient(135deg, rgba(76, 175, 80, 0.24), rgba(67, 160, 71, 0.12));
  border-radius: calc(var(--lab-card-radius) - 6px);
  overflow: hidden;
  border: 1px solid rgba(76, 175, 80, 0.22);
  display: grid;
  place-items: center;
  width: 100%;
  min-height: 320px;
  aspect-ratio: var(--preview-stage-aspect, 1);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.preview-stage--active {
  background: linear-gradient(135deg, rgba(76, 175, 80, 0.28), rgba(46, 125, 50, 0.16));
}

.preview-stage--idle {
  background: linear-gradient(135deg, rgba(76, 175, 80, 0.2), rgba(67, 160, 71, 0.12));
}

.preview-stage--loading {
  background: #ffffff;
  border-color: rgba(76, 175, 80, 0.32);
  box-shadow: inset 0 0 0 1px rgba(76, 175, 80, 0.18);
}

html[data-theme='dark'] .preview-stage {
  background: linear-gradient(135deg, rgba(107, 219, 165, 0.2), rgba(12, 28, 44, 0.78));
  border: 1px solid rgba(107, 219, 165, 0.32);
}

html[data-theme='dark'] .preview-stage--active {
  background: linear-gradient(135deg, rgba(107, 219, 165, 0.28), rgba(12, 36, 56, 0.85));
}

html[data-theme='dark'] .preview-stage--idle {
  background: linear-gradient(135deg, rgba(107, 219, 165, 0.22), rgba(12, 28, 44, 0.78));
}

html[data-theme='dark'] .preview-stage--loading {
  background: rgba(6, 17, 29, 0.95);
  border-color: rgba(107, 219, 165, 0.45);
  box-shadow: inset 0 0 0 1px rgba(107, 219, 165, 0.22);
}

.preview-stage__loader {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 32px;
  gap: 16px;
  color: #1e3a27;
  font-weight: 600;
  font-size: 1.05rem;
  line-height: 1.4;
  background: rgba(255, 255, 255, 0.96);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  z-index: 5;
}

.preview-stage__loader p {
  margin: 18px 0 0;
  font-weight: 500;
  color: rgba(30, 58, 39, 0.82);
}

.preview-stage__spinner {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 4px solid rgba(46, 125, 50, 0.18);
  border-top-color: rgba(46, 125, 50, 0.9);
  animation: preview-spin 0.8s linear infinite;
}

.preview-stage--loading .preview-stage__loader {
  opacity: 1;
  pointer-events: auto;
}

.preview-stage--loading canvas,
.preview-stage--loading video,
.preview-stage--loading img {
  opacity: 0;
}

.preview-stage:focus-visible {
  outline: 2px solid rgba(76, 175, 80, 0.45);
  outline-offset: 4px;
}

.preview-stage canvas,
.preview-stage video,
.preview-stage img {
  grid-area: 1 / 1;
  width: 100%;
  height: 100%;
}

.preview-stage video {
  object-fit: cover;
}

.preview-stage img {
  object-fit: contain;
  display: block;
}

.preview-stage img[hidden],
.preview-stage video[hidden],
.preview-stage canvas[hidden] {
  display: none;
}

.preview-stage--show-result canvas,
.preview-stage--show-result video,
.preview-stage--show-result img#uploadedPreview {
  opacity: 0;
  pointer-events: none;
}

.preview-stage #resultImage {
  opacity: 0;
  transition: opacity 0.2s ease;
}

.preview-stage--show-result #resultImage {
  opacity: 1;
}

@keyframes preview-spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

#compositeCanvas {
  width: 100%;
  height: 100%;
  max-width: none;
  border-radius: 0;
  box-shadow: none;
  background: transparent;
  display: block;
}





.camera-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--lab-muted-soft);
  background: rgba(255, 255, 255, 0.9);
  border-radius: 999px;
  padding: 6px 16px;
  box-shadow: 0 10px 26px rgba(27, 67, 50, 0.16);
  border: 1px solid rgba(76, 175, 80, 0.22);
  cursor: pointer;
}

:root[data-theme='dark'] .camera-toggle {
  background: rgba(6, 17, 29, 0.92);
  border-color: rgba(107, 219, 165, 0.38);
  box-shadow: 0 16px 32px rgba(1, 6, 12, 0.55);
  color: #d4f6e7;
}

.camera-toggle--on {
  border-color: rgba(76, 175, 80, 0.32);
  color: var(--lab-muted);
}

:root[data-theme='dark'] .camera-toggle--on {
  border-color: rgba(107, 219, 165, 0.55);
  color: #f0fff7;
}

.camera-toggle--on .camera-toggle__state {
  color: #2f8d34;
}

:root[data-theme='dark'] .camera-toggle--on .camera-toggle__state {
  color: #6bdba5;
}

.camera-toggle__text {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.camera-toggle__control {
  position: relative;
  width: 42px;
  height: 22px;
  flex-shrink: 0;
}

.camera-toggle__control input {
  position: absolute;
  inset: 0;
  margin: 0;
  opacity: 0;
  cursor: pointer;
}

.camera-toggle__track {
  position: absolute;
  inset: 0;
  border-radius: 999px;
  background: rgba(45, 62, 45, 0.18);
  transition: background 0.2s ease;
}

:root[data-theme='dark'] .camera-toggle__track {
  background: rgba(107, 219, 165, 0.28);
}

.camera-toggle__thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #ffffff;
  box-shadow: 0 2px 6px rgba(15, 30, 39, 0.18);
  transition: transform 0.2s ease;
}

:root[data-theme='dark'] .camera-toggle__thumb {
  background: #f4fffb;
  box-shadow: 0 2px 10px rgba(1, 6, 12, 0.48);
}

.camera-toggle__control input:checked + .camera-toggle__track {
  background: linear-gradient(135deg, #2f8d34, #4caf50);
}

.camera-toggle__control input:checked + .camera-toggle__track .camera-toggle__thumb {
  transform: translateX(20px);
}

.camera-toggle__control input:focus-visible + .camera-toggle__track {
  outline: 2px solid rgba(76, 175, 80, 0.45);
  outline-offset: 2px;
}

.camera-toggle__state {
  min-width: 26px;
  text-align: right;
  color: var(--lab-muted);
}

.preview-card header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.preview-controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin-top: 6px;
  align-items: stretch;
}

.status {
  margin-top: 14px;
}

.lab-footer {
  text-align: center;
  font-size: 0.9rem;
  padding: 24px;
  color: var(--lp-color-footer-text);
}

@media (max-width: 1100px) {
  .hero {
    grid-template-columns: 1fr;
    grid-template-areas:
      'body'
      'preview';
  }

  #compositeCanvas {
    max-width: 100%;
  }
}

@media (max-width: 720px) {
  .hero {
    padding: 28px;
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
      'body'
      'preview'
      'prompt';
    gap: 28px;
  }

  .preview-stage {
    padding: 0;
  }

  #compositeCanvas {
    max-width: none;
    border-radius: calc(var(--lab-card-radius) - 6px);
  }

  .hero__preview {
    margin-top: 0;
  }

  .hero__prompt {
    gap: 24px;
  }
}