.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--bg-shell);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
}

.header-content {
  max-width: 1180px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: inherit;
}

.site-brand:hover {
  color: inherit;
}

.site-brand-mark {
  display: block;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  object-fit: contain;
  transform: translateY(2px);
  filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.28));
}

.site-title {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 18px;
  margin: 0;
  padding: 0;
}

.main-nav a {
  display: inline-block;
  color: var(--text-soft);
  font-weight: 600;
  padding: 8px 0;
  border-radius: 0;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  border: 1px solid transparent;
  border-bottom: 2px solid transparent;
}

.main-nav a:hover {
  background: transparent;
  border-color: transparent;
  color: var(--text);
}

.main-nav a.active {
  background: transparent;
  border-color: transparent;
  border-bottom-color: var(--accent);
  color: var(--accent);
  font-weight: 600;
}

.page-content {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

.page-hero {
  margin-bottom: 28px;
}

.js body.motion-pending [data-shell-reveal] {
  opacity: 0;
  filter: blur(10px);
}

body.shell-visible [data-shell-reveal] {
  opacity: 0;
  filter: blur(10px);
  animation: sectionPanelReveal var(--motion-shell-panel-duration) var(--motion-ease-emphasized) forwards;
  animation-delay: calc(var(--shell-reveal-index, 0) * var(--motion-shell-panel-stagger));
}

.page-hero--wide {
  max-width: 100%;
}

.page-hero--standard {
  max-width: 860px;
}

.page-kicker {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.js body.motion-pending [data-shell-text] {
  opacity: 0;
  filter: blur(8px);
}

body.shell-visible [data-shell-text] {
  opacity: 0;
  filter: blur(8px);
  animation: textGenerate var(--motion-shell-text-duration) var(--motion-ease-emphasized) forwards;
  animation-delay: calc(
    var(--shell-text-index, 0) * var(--motion-shell-text-stagger) + var(--motion-shell-text-offset)
  );
}

.section-list {
  min-height: 320px;
}

.browser-shell {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.browser-sidebar {
  position: sticky;
  top: 104px;
  display: grid;
  gap: 16px;
}

.browser-sidebar-copy {
  display: grid;
  gap: 6px;
}

.browser-sidebar-label {
  margin: 0;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.browser-sidebar-text {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.95rem;
}

.browser-stage {
  min-width: 0;
  width: 100%;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(24, 24, 24, 0.96), rgba(13, 13, 13, 0.98));
  box-shadow: var(--shadow);
}

.page-panel {
  width: 100%;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(24, 24, 24, 0.96), rgba(13, 13, 13, 0.98));
  box-shadow: var(--shadow);
}

.section-nav-list {
  display: grid;
  gap: 8px;
}

.section-nav-button {
  width: 100%;
  border: 1px solid var(--border);
  padding: 11px 13px;
  border-radius: 12px;
  background: transparent;
  color: var(--text-soft);
  font: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.section-nav-button:hover {
  background: rgba(255, 255, 255, 0.03);
  border-color: var(--border);
  color: var(--text);
}

.section-nav-button.is-active {
  background: rgba(230, 180, 80, 0.08);
  border-color: rgba(230, 180, 80, 0.35);
  color: var(--accent);
  box-shadow: inset 3px 0 0 var(--accent);
}

.page-title {
  margin: 0 0 6px;
  text-align: left;
  color: var(--accent);
  font-size: clamp(2rem, 4vw, 2.5rem);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.page-intro {
  margin: 0;
  max-width: 760px;
  color: var(--text-soft);
}

.page-hero--wide .page-intro {
  max-width: 100%;
}

.loading-message,
.noscript-message {
  margin: 0 0 16px;
  text-align: center;
  color: var(--text-soft);
}

.panel-copy {
  color: var(--text-muted);
  max-width: 100%;
}

.panel-section-heading {
  margin: 1.8rem 0 0.5rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  font-size: 1.15rem;
}

.page-panel--centered {
  width: 100%;
  display: grid;
  justify-items: center;
  text-align: center;
  gap: 18px;
}

.page-panel-title {
  margin: 0;
  color: var(--text);
  font-size: clamp(1.45rem, 3.4vw, 2rem);
}

.home-info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  width: 100%;
}

.home-info-card {
  display: grid;
  gap: 8px;
  padding: 18px 16px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.02);
  text-align: left;
}

.home-info-card h3,
.home-info-card p {
  margin: 0;
}

.home-info-card h3 {
  color: var(--text);
  font-size: 1rem;
}

.social-link-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  width: 100%;
}

.social-link-card {
  display: grid;
  justify-items: center;
  gap: 10px;
  padding: 18px 14px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.02);
  color: var(--text);
  text-align: center;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.social-link-card:hover {
  transform: translateY(-1px);
  border-color: rgba(230, 180, 80, 0.35);
  background: rgba(230, 180, 80, 0.05);
  color: #fff3d1;
}

.social-link-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
}

.social-link-icon svg {
  width: 28px;
  height: 28px;
}

.social-link-label {
  font-weight: 700;
}

.build-description {
  margin-top: 8px;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.build-field {
  margin: 12px 0 0;
}

.build-section {
  display: grid;
  gap: 16px;
}

.build-section.is-visible .build-section-header,
.build-section.is-visible .welcome-block,
.build-section.is-visible .accordion-item.nested {
  opacity: 0;
  filter: blur(10px);
  animation: sectionPanelReveal var(--motion-section-panel-duration) var(--motion-ease-emphasized) forwards;
  animation-delay: calc(var(--reveal-index, 0) * var(--motion-section-panel-stagger));
}

.build-section-items {
  display: grid;
  gap: 10px;
}

.build-section-header {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.build-section-heading-group {
  display: grid;
  gap: 4px;
}

.build-section-title {
  margin: 0;
  font-size: clamp(1.6rem, 3vw, 2rem);
}

.build-section.is-visible .build-section-title,
.build-section.is-visible .build-section-meta,
.build-section.is-visible .section-intro,
.build-section.is-visible .welcome-block-title,
.build-section.is-visible .welcome-block-intro,
.build-section.is-visible .welcome-subheading,
.build-section.is-visible .welcome-card p,
.build-section.is-visible .welcome-list li,
.build-section.is-visible .build-description,
.build-section.is-visible .build-field {
  opacity: 0;
  filter: blur(8px);
  animation: textGenerate var(--motion-section-text-duration) var(--motion-ease-emphasized) forwards;
  animation-delay: calc(
    var(--text-reveal-index, 0) * var(--motion-section-text-stagger) + var(--motion-section-text-offset)
  );
}

.build-section-meta {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.9rem;
}

.section-heading {
  margin: 1.25rem 0 0.5rem;
  font-size: 1.35rem;
  font-weight: 600;
}

.section-intro {
  color: var(--text-soft);
}

.note-spacer {
  margin-top: 1.5em;
}

.video-wrapper {
  position: relative;
  margin: 1em 0;
  border: 1px solid rgba(0, 0, 0, 0.78);
  border-radius: 10px;
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.28);
  overflow: hidden;
}

.video-poster {
  position: absolute;
  inset: 0;
  z-index: 1;
  transition: opacity var(--motion-iframe-poster-fade-duration) ease;
  pointer-events: none;
}

.video-wrapper.is-loaded .video-poster {
  opacity: 0;
}

.video-poster img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.video-poster-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.04), rgba(0, 0, 0, 0.22));
}

.video-poster-loader {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 34px;
  height: 34px;
  margin: -17px 0 0 -17px;
  border: 2px solid rgba(255, 255, 255, 0.22);
  border-top-color: rgba(255, 255, 255, 0.88);
  border-radius: 50%;
  box-shadow: 0 0 0 8px rgba(0, 0, 0, 0.18);
  opacity: 0;
  transform: scale(0.92);
  transition:
    opacity var(--motion-iframe-loader-transition-duration) ease,
    transform var(--motion-iframe-loader-transition-duration) ease;
}

.video-wrapper.is-loading .video-poster-loader {
  opacity: 1;
  transform: scale(1);
  animation: videoPosterSpin var(--motion-iframe-loader-spin-duration) linear infinite;
}

.video-wrapper.is-loaded .video-poster-loader {
  opacity: 0;
  animation: none;
}

.video-wrapper iframe {
  position: relative;
  z-index: 2;
  border-radius: 0;
  opacity: 0;
  transition: opacity 80ms ease;
}

.video-wrapper.is-ready iframe {
  opacity: 1;
}

.welcome-section-content {
  display: grid;
  gap: 18px;
}

.welcome-section-content > * {
  margin: 0;
}

.welcome-block {
  display: grid;
  gap: 14px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.02);
}

.welcome-block--intro {
  gap: 12px;
}

.welcome-block-title {
  margin: 0;
  font-size: 1.15rem;
  color: var(--text);
}

.welcome-block-intro {
  margin: 0;
  color: var(--text-soft);
}

.welcome-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.welcome-card-grid--wide {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.welcome-card {
  display: grid;
  gap: 8px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
}

.welcome-card p {
  margin: 0;
  color: var(--text-muted);
}

.welcome-video {
  margin-top: 0;
}

.welcome-subheading {
  margin: 0;
  font-size: 1rem;
  color: var(--text);
}

.welcome-list {
  margin: 0 0 0 18px;
  display: grid;
  gap: 8px;
  padding-left: 20px;
  color: var(--text-muted);
}

.welcome-note {
  margin-top: 0;
}

.build-transcript-inline {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  white-space: pre-line;
  font-size: 0.9rem;
  color: var(--text-soft);
}

.build-transcript-inline strong {
  color: var(--text-muted);
}

@keyframes sectionPanelReveal {
  from {
    opacity: 0;
    filter: blur(10px);
  }

  to {
    opacity: 1;
    filter: blur(0);
  }
}

@keyframes textGenerate {
  from {
    opacity: 0;
    filter: blur(8px);
  }

  to {
    opacity: 1;
    filter: blur(0);
  }
}

@keyframes videoPosterSpin {
  from {
    transform: scale(1) rotate(0deg);
  }

  to {
    transform: scale(1) rotate(360deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .js body.motion-pending [data-shell-reveal],
  .js body.motion-pending [data-shell-text],
  body.shell-visible [data-shell-reveal],
  body.shell-visible [data-shell-text],
  .build-section.is-visible .build-section-header,
  .build-section.is-visible .welcome-block,
  .build-section.is-visible .accordion-item.nested,
  .build-section.is-visible .build-section-title,
  .build-section.is-visible .build-section-meta,
  .build-section.is-visible .section-intro,
  .build-section.is-visible .welcome-block-title,
  .build-section.is-visible .welcome-block-intro,
  .build-section.is-visible .welcome-subheading,
  .build-section.is-visible .welcome-card p,
  .build-section.is-visible .welcome-list li,
  .build-section.is-visible .build-description,
  .build-section.is-visible .build-field {
    animation: none;
    opacity: 1;
    filter: none;
  }

  .video-wrapper.is-loading .video-poster-loader {
    animation: none;
  }
}