.project-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-height);
  background: transparent;
  -webkit-backdrop-filter: blur(0px);
  backdrop-filter: blur(0px);
  transition:
    background-color 300ms ease-out,
    border-color 300ms ease-out,
    box-shadow 300ms ease-out,
    backdrop-filter 300ms ease-out,
    -webkit-backdrop-filter 300ms ease-out;
}

.project-header.scrolled {
  border-bottom: 1px solid var(--header-border);
  background: var(--header-bg);
  -webkit-backdrop-filter: blur(24px);
  backdrop-filter: blur(24px);
  box-shadow: var(--shadow-lg);
}

.project-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(100% - 32px, var(--nav-container));
  height: 100%;
  margin: 0 auto;
}

.project-brand {
  flex-shrink: 0;
  color: var(--primary);
  font-family: var(--font-serif);
  font-size: 1.1875rem;
  font-weight: 600;
  line-height: 1.625rem;
  white-space: nowrap;
  transition: color var(--transition);
}

.project-brand:hover {
  color: var(--accent);
}

.project-nav-links,
.project-nav-menu {
  display: flex;
  align-items: center;
}

.project-nav-links {
  gap: 0.5rem;
}

.project-nav-menu {
  gap: 0.25rem;
}

.project-nav-menu a {
  display: block;
  padding: 0.5rem 0.75rem;
  border-radius: 0.5rem;
  color: var(--neutral-600);
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.25rem;
  transition:
    color 150ms ease,
    background-color 150ms ease;
}

.project-nav-menu a:hover {
  color: var(--primary);
  background: rgba(14, 165, 233, 0.1);
}

[data-theme="dark"] .theme-toggle,
[data-theme="dark"] .language-toggle {
  border-color: var(--neutral-200);
  background: var(--neutral-50);
}

[data-theme="dark"] .theme-toggle:hover,
[data-theme="dark"] .language-toggle:hover {
  background: var(--neutral-100);
}

.project-page {
  width: min(100% - 32px, var(--page-container));
  padding: 0 0 4rem;
  margin: 0 auto;
}

.project-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(16rem, 0.55fr);
  gap: 3rem;
  align-items: end;
  padding: 2.7rem 0 0;
}

.project-kicker,
.section-eyebrow {
  margin: 0 0 0.75rem;
  color: var(--accent);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.project-title-block {
  min-width: 0;
}

.project-hero h1 {
  max-width: 820px;
  margin: 0;
  color: var(--primary);
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: 0;
}

.project-subtitle {
  margin: 0.5rem 0 0;
  color: var(--primary);
  font-family: var(--font-serif);
  font-size: clamp(1.35rem, 3vw, 2.15rem);
  font-weight: 600;
  line-height: 1.2;
}

.project-lead {
  max-width: 700px;
  margin: 1.25rem 0 0;
  color: var(--neutral-700);
  font-size: 0.975rem;
  line-height: 1.75;
}

.project-lead strong,
.project-section strong {
  color: var(--primary);
  font-weight: 600;
}

.project-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.75rem;
  max-width: 700px;
  margin-top: 0.65rem;
  padding-right: 1.1rem;
  transform: translateY(-0.25rem);
}

.project-demo-link,
.download-button,
.secondary-button,
.pattern-button,
.file-control span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--card-border);
  border-radius: 0.5rem;
  color: var(--accent);
  background: var(--card-bg);
  box-shadow: 0 10px 26px rgba(30, 41, 59, 0.06);
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.25rem;
  cursor: pointer;
  transition:
    color var(--transition),
    background-color var(--transition),
    border-color var(--transition),
    box-shadow var(--transition),
    transform var(--transition);
}

.project-demo-link,
.download-button,
.secondary-button,
.file-control span {
  min-height: 2.5rem;
  padding: 0.5rem 0.85rem;
}

.project-demo-link:hover,
.download-button:hover,
.secondary-button:hover,
.pattern-button:hover,
.file-control:hover span {
  border-color: rgba(14, 159, 178, 0.35);
  color: var(--accent-dark);
  background: rgba(14, 165, 233, 0.08);
  box-shadow: 0 14px 32px rgba(30, 41, 59, 0.1);
}

.project-meta {
  display: grid;
  gap: 1rem;
  min-width: 0;
  padding: 1rem;
  margin: 0;
  border: 1px solid var(--card-border);
  border-radius: 0.5rem;
  background: var(--card-bg);
  box-shadow: 0 12px 32px rgba(30, 41, 59, 0.08);
  transform: translateY(-0.2rem);
}

.project-meta div {
  display: grid;
  gap: 0.25rem;
}

.project-meta dt {
  color: var(--accent);
  font-size: 0.8125rem;
  font-weight: 700;
  line-height: 1.25rem;
}

.project-meta dd {
  margin: 0;
  color: var(--neutral-700);
  font-size: 0.875rem;
  line-height: 1.4;
}

.project-section {
  scroll-margin-top: 6rem;
  padding: 2.2rem 0;
}

.project-section h2 {
  margin: 0;
  color: var(--primary);
  font-family: var(--font-serif);
  font-size: clamp(1.45rem, 2.5vw, 2rem);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: 0;
}

.project-section h3 {
  margin: 0;
  color: var(--primary);
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.25;
}

.project-section p {
  margin: 0.85rem 0 0;
  color: var(--neutral-700);
  font-size: 0.9375rem;
  line-height: 1.65;
}

.section-heading {
  max-width: 860px;
  margin-bottom: 1.5rem;
}

.demo-section-heading {
  position: relative;
}

.demo-section-heading h2 {
  margin: 0.85rem 0 0.75rem;
}

.demo-title-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.demo-workspace {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.canvas-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  align-items: stretch;
}

.canvas-panel,
.control-panel,
.contribution-grid article {
  border: 1px solid var(--card-border);
  border-radius: 0.5rem;
  background: var(--card-bg);
  box-shadow: 0 14px 34px rgba(30, 41, 59, 0.08);
}

.canvas-panel {
  overflow: hidden;
  margin: 0;
}

.demo-heading-doodle {
  flex: 0 0 auto;
  width: 7.2rem;
  margin: -1.8rem 0 -1.95rem 0.45rem;
  object-fit: contain;
  opacity: 0.86;
  transform: rotate(-7deg);
  pointer-events: none;
  user-select: none;
}

[data-theme="dark"] .demo-heading-doodle {
  opacity: 0.78;
}

.canvas-panel figcaption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  height: 3.55rem;
  padding: 0.8rem 0.9rem;
  box-sizing: border-box;
  border-bottom: 1px solid var(--card-border);
  color: var(--primary);
  font-size: 0.875rem;
  font-weight: 700;
  line-height: 1.25rem;
}

.canvas-panel figcaption small {
  color: var(--neutral-500);
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1rem;
  text-align: right;
  white-space: nowrap;
}

.canvas-panel canvas {
  display: block;
  width: 100%;
  background:
    linear-gradient(135deg, rgba(14, 159, 178, 0.08), transparent 42%),
    var(--neutral-50);
}

#source-canvas {
  width: 100%;
  height: auto;
  cursor: crosshair;
  touch-action: none;
}

#result-canvas {
  width: 100%;
  height: auto;
}

.control-panel {
  display: grid;
  grid-template-columns:
    minmax(12rem, 1.15fr)
    minmax(12rem, 1.25fr)
    repeat(2, minmax(7rem, 0.7fr))
    minmax(10rem, 1fr);
  gap: 1rem;
  align-items: end;
  padding: 0.7rem 0.8rem 0.75rem;
}

.toolbar-group {
  display: grid;
  min-width: 0;
  padding: 0;
  margin: 0;
  border: 0;
}

.toolbar-group legend,
.range-control > span {
  display: block;
  width: 100%;
  padding: 0;
  margin: 0 0 0.45rem;
  color: var(--neutral-600);
  font-size: 0.7rem;
  font-weight: 700;
  line-height: 1rem;
  text-transform: uppercase;
}

.upload-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.4rem;
}

.file-control {
  min-width: 0;
}

.file-control input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.secondary-button,
.pattern-button {
  font-family: inherit;
}

.file-control span,
.secondary-button {
  width: 100%;
  min-height: 2rem;
  padding: 0.35rem 0.45rem;
  font-size: 0.72rem;
  white-space: nowrap;
}

.pattern-options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr)) minmax(0, 1.2fr);
  gap: 0.4rem;
}

.pattern-button {
  min-height: 2rem;
  padding: 0.35rem 0.35rem;
  box-shadow: none;
  font-size: 0.72rem;
  white-space: nowrap;
}

.pattern-button.is-active {
  border-color: rgba(14, 159, 178, 0.5);
  color: #ffffff;
  background: var(--accent);
}

.range-control {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  min-width: 0;
  color: var(--neutral-700);
  font-size: 0.72rem;
  font-weight: 600;
  line-height: 1rem;
}

.range-control output {
  grid-column: 2;
  grid-row: 1;
  margin-top: 0;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  font-size: 0.72rem;
}

.range-control input {
  grid-column: 1 / -1;
  width: 100%;
  margin: 0;
  accent-color: var(--accent);
}

.toggle-tools {
  gap: 0.25rem;
}

.toggle-control {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  color: var(--neutral-700);
  font-size: 0.68rem;
  font-weight: 600;
  line-height: 1rem;
  white-space: nowrap;
}

.toggle-control span {
  overflow: hidden;
  text-overflow: ellipsis;
}

.toggle-control input {
  width: 0.85rem;
  height: 0.85rem;
  margin: 0;
  accent-color: var(--accent);
}

.download-button {
  min-height: 2.2rem;
  color: #ffffff;
  background: #be5a38;
  padding: 0.45rem 0.65rem;
  font-size: 0.72rem;
  white-space: nowrap;
}

.download-button:hover {
  border-color: rgba(190, 90, 56, 0.45);
  color: #ffffff;
  background: #a3472c;
}

.result-download {
  width: auto;
  min-height: 1.9rem;
  padding: 0.3rem 0.55rem;
  font-size: 0.7rem;
  line-height: 1rem;
}

.caption-range-control {
  display: grid;
  grid-template-columns: auto 5.4rem auto;
  gap: 0.4rem;
  align-items: center;
  min-width: 0;
  color: var(--neutral-600);
  font-size: 0.7rem;
  font-weight: 600;
  line-height: 1rem;
}

.caption-title {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-width: 0;
}

.caption-title > span {
  flex-shrink: 0;
  white-space: nowrap;
}

.caption-range-control input,
.caption-mini-control input {
  width: 100%;
  margin: 0;
  accent-color: var(--accent);
}

.caption-range-control output,
.caption-mini-control output {
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.result-actions {
  display: flex;
  align-items: center;
  flex: 0 0 auto;
  gap: 0.22rem;
  margin-left: auto;
  min-width: 0;
}

.result-panel figcaption {
  align-items: center;
  gap: 0.45rem;
}

.result-panel figcaption > span {
  flex-shrink: 0;
  white-space: nowrap;
}

.caption-tile-tools {
  display: flex;
  gap: 0.28rem;
  align-items: center;
  flex: 0 0 auto;
  margin-right: 0.1rem;
}

.caption-tools-title {
  color: var(--neutral-600);
  font-size: 0.68rem;
  font-weight: 700;
  line-height: 1rem;
  text-transform: uppercase;
}

.caption-mini-control {
  display: grid;
  grid-template-columns: 0.55rem 2.25rem 0.55rem;
  gap: 0.12rem;
  align-items: center;
  width: 3.59rem;
  color: var(--neutral-600);
  font-size: 0.68rem;
  font-weight: 600;
  line-height: 1rem;
}

.contribution-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.contribution-grid article {
  padding: 1.25rem 1rem 1rem;
}

.contribution-grid p {
  margin-top: 0.65rem;
  color: var(--neutral-700);
  font-size: 0.875rem;
  line-height: 1.55;
}

.boundary-section {
  padding-top: 1.2rem;
}

.boundary-list {
  display: grid;
  gap: 0.75rem;
  max-width: 860px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.boundary-list li {
  position: relative;
  padding: 0.95rem 1rem 0.95rem 2.1rem;
  border: 1px solid var(--card-border);
  border-radius: 0.5rem;
  color: var(--neutral-700);
  background: var(--card-bg);
  box-shadow: 0 10px 26px rgba(30, 41, 59, 0.05);
  font-size: 0.875rem;
  line-height: 1.55;
}

.boundary-list li::before {
  position: absolute;
  top: 1.35rem;
  left: 1rem;
  width: 0.42rem;
  height: 0.42rem;
  border-radius: 999px;
  background: #be5a38;
  content: "";
}

.project-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(100% - 32px, var(--page-container));
  padding: 1.5rem 0 2.5rem;
  margin: 0 auto;
  color: var(--neutral-500);
  font-size: 0.875rem;
}

.project-footer a {
  color: var(--accent);
  font-weight: 500;
  transition: color var(--transition);
}

.project-footer a:hover {
  color: var(--accent-dark);
}

@media (min-width: 640px) {
  .project-nav,
  .project-page,
  .project-footer {
    width: min(100% - 48px, var(--page-container));
  }
}

@media (min-width: 1024px) {
  .project-nav {
    width: min(100% - 64px, var(--nav-container));
  }

  .project-page,
  .project-footer {
    width: min(100% - 64px, var(--page-container));
  }

  .project-brand {
    font-size: 1.375rem;
    line-height: 1.875rem;
  }

  .project-nav-links {
    gap: 0.75rem;
  }
}

@media (max-width: 980px) {
  .project-hero,
  .demo-workspace,
  .canvas-row,
  .contribution-grid {
    grid-template-columns: 1fr;
  }

  .project-hero {
    gap: 1.5rem;
    align-items: start;
  }

  .project-actions {
    justify-content: flex-start;
    padding-right: 0;
    transform: none;
  }

  .project-meta {
    transform: none;
  }

  .control-panel {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .image-tools,
  .pattern-tools {
    grid-column: span 2;
  }
}

@media (max-width: 720px) {
  .project-nav,
  .project-page,
  .project-footer {
    width: min(100% - 24px, var(--page-container));
  }

  .project-hero {
    padding: 1.8rem 0 0.75rem;
  }

  .project-section {
    padding: 2rem 0;
  }

  .project-nav-menu a {
    padding: 0.45rem 0.5rem;
  }

  .control-panel {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    padding: 0.75rem;
  }

  .image-tools,
  .pattern-tools {
    grid-column: 1 / -1;
  }

  .project-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.5rem;
  }
}

@media (max-width: 520px) {
  .project-brand {
    min-width: 0;
    max-width: 8.4rem;
    overflow: hidden;
    font-size: 1.0625rem;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .project-nav-links {
    flex-shrink: 0;
    gap: 0.35rem;
  }

  .project-nav-menu {
    display: none;
  }

  .theme-toggle,
  .language-toggle {
    height: 2.25rem;
    border-radius: 0.45rem;
  }

  .theme-toggle {
    width: 2.25rem;
  }

  .language-toggle {
    min-width: 3.125rem;
    padding: 0 0.4rem;
  }

  .canvas-panel figcaption {
    align-items: flex-start;
    flex-direction: column;
    height: 5.75rem;
  }

  .result-actions {
    width: 100%;
    justify-content: flex-end;
  }

  .caption-range-control {
    width: 100%;
    grid-template-columns: auto minmax(0, 1fr) auto;
  }

  .demo-title-row {
    align-items: flex-start;
  }

  .demo-heading-doodle {
    width: 6rem;
    margin: -1.2rem 0 -2.5rem 0.1rem;
  }
}