:root {
  --color-bg: #FFFFFF;
  --color-bg-alt: #FFFFFF;
  --color-surface: #FFFFFF;
  --color-text: #1A1A1A;
  --color-text-secondary: #575C70;
  --color-text-light: #6C7185;
  --color-border: #DEE2F2;
  --color-inverse: #F8F9FF;
  --color-inverse-muted: rgba(248, 249, 255, 0.55);

  --font-display: var(--font-body);
  --font-body: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', 'Heiti SC', sans-serif;

  --space-2xs: 0.25rem;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
  --space-2xl: 10rem;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 0.3s;
  --duration-normal: 0.6s;
  --duration-slow: 1s;
  --duration-slower: 1.4s;

  --nav-height: 72px;
  --max-width: 1360px;
  --radius: 4px;

  --ease-curtain: cubic-bezier(0.76, 0, 0.24, 1);
  --color-accent: #4C5DFA;
  --color-accent-strong: #3949D8;
  --menu-accent: var(--color-accent);
}
/* --- 4. Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-lg);
  z-index: 1000;
  view-transition-name: site-nav;
  transition: background-color var(--duration-fast) ease,
              box-shadow var(--duration-fast) ease,
              transform var(--duration-normal) var(--ease-out);
}

.nav--scrolled {
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--color-border);
}

.nav--hidden {
  transform: translateY(-100%);
}

.nav--menu-open {
  transform: none;
}

/* Kept on until the dark curtain has cleared the top of the screen */
.nav--on-dark {
  background-color: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  box-shadow: none;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  z-index: 1002;
  transform: scaleX(0);
  transform-origin: left;
  pointer-events: none;
}

.nav__logo {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  position: relative;
  z-index: 1010;
  transition: color var(--duration-fast) ease;
}

.nav--on-dark .nav__logo {
  color: var(--color-inverse);
  transition-delay: 0.2s;
}

.nav__meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--color-text-secondary);
  transition: opacity var(--duration-fast) ease;
}

.nav--on-dark .nav__meta {
  opacity: 0;
  pointer-events: none;
}

.nav__time {
  font-variant-numeric: tabular-nums;
  color: var(--color-text-light);
}

.nav__status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-text);
  font-weight: 500;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #10B981;
  position: relative;
}

.status-dot::after {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: 50%;
  border: 1px solid #10B981;
  animation: pulseDot 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulseDot {
  0% { transform: scale(1); opacity: 1; }
  100% { transform: scale(2.2); opacity: 0; }
}

.nav__menu-btn {
  position: relative;
  z-index: 1010;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  height: 44px;
  padding: 0 0 0 var(--space-xs);
  margin-right: -4px;
  color: var(--color-text);
  transition: color var(--duration-fast) ease;
}

.nav--on-dark .nav__menu-btn {
  color: var(--color-inverse);
  transition-delay: 0.2s;
}

/* Both words stacked in a one-line mask; opening slides to the second */
.nav__menu-label {
  display: block;
  height: 1.25em;
  overflow: hidden;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  line-height: 1.25;
}

.nav__menu-label span {
  display: block;
  transition: transform var(--duration-normal) var(--ease-out);
}

.nav--menu-open .nav__menu-label span {
  transform: translateY(-100%);
}

.nav__menu-icon {
  position: relative;
  width: 28px;
  height: 12px;
}

.nav__menu-icon span {
  position: absolute;
  left: 0;
  top: calc(50% - 0.75px);
  width: 100%;
  height: 1.5px;
  background: currentColor;
  transition: transform var(--duration-normal) var(--ease-out);
}

.nav__menu-icon span:nth-child(1) { transform: translateY(-5px); }
.nav__menu-icon span:nth-child(2) { transform: translateY(5px); }

.nav__menu-btn:hover .nav__menu-icon span:nth-child(1) { transform: translateY(-5px) scaleX(0.6); }

.nav--menu-open .nav__menu-icon span:nth-child(1),
.nav--menu-open .nav__menu-btn:hover .nav__menu-icon span:nth-child(1) { transform: rotate(45deg); }
.nav--menu-open .nav__menu-icon span:nth-child(2) { transform: rotate(-45deg); }

.nav--on-dark :focus-visible { outline-color: var(--color-inverse); }

/* --- 5. Full-screen Menu --- */
/* Sits under the nav (z 1000) so the logo and close button stay on top. */
.menu-overlay {
  position: fixed;
  inset: 0;
  z-index: 990;
  visibility: hidden;
  color: var(--color-inverse);
}

.menu-overlay.is-open,
.menu-overlay.is-closing {
  visibility: visible;
}

.menu-overlay :focus-visible { outline-color: var(--color-inverse); }

.menu-overlay p { color: inherit; }

/* Two blue curtains: the darker one leads on open and trails on close */
.menu-overlay__bg {
  position: absolute;
  inset: 0;
  background: var(--color-accent);
  clip-path: inset(0 0 100% 0);
}

.menu-overlay__bg--accent {
  background: var(--color-accent-strong);
}

.menu-overlay.is-open .menu-overlay__bg {
  clip-path: inset(0 0 0 0);
  transition: clip-path 0.85s var(--ease-curtain) 0.08s;
}

.menu-overlay.is-open .menu-overlay__bg--accent { transition-delay: 0s; }

.menu-overlay.is-closing .menu-overlay__bg {
  transition: clip-path 0.7s var(--ease-curtain) 0.22s;
}

.menu-overlay.is-closing .menu-overlay__bg--accent { transition-delay: 0.32s; }

.menu-overlay__inner {
  position: relative;
  z-index: 1;
  height: 100%;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-rows: 1fr auto;
  column-gap: var(--space-xl);
  padding: calc(var(--nav-height) + var(--space-sm)) var(--space-lg) var(--space-md);
  overflow-y: auto;
  overscroll-behavior: contain;
}

.menu-overlay__nav {
  align-self: center;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: var(--space-md) 0;
}

.menu-overlay__link {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  column-gap: var(--space-xs);
  padding: 0.06em 0;
  font-family: var(--font-display);
  font-size: clamp(2.75rem, min(8vw, 11vh), 6.5rem);
  line-height: 1.1;
  transition: opacity var(--duration-fast) ease,
              transform var(--duration-normal) var(--ease-out);
}

/* Right padding leaves room for the current-page dot so every description lines up */
.menu-overlay__link-mask {
  display: block;
  overflow: hidden;
  padding: 0.04em 0.3em 0.1em 0;
  margin: -0.04em 0 -0.1em;
}

.menu-overlay__link-text {
  display: block;
  position: relative;
  transform: translateY(110%);
}

.menu-overlay.is-open .menu-overlay__link-text {
  transform: none;
  transition: transform 0.95s var(--ease-out);
  transition-delay: calc(0.42s + var(--i, 0) * 0.07s);
}

.menu-overlay.is-closing .menu-overlay__link-text {
  transform: translateY(-110%);
  transition: transform 0.45s cubic-bezier(0.7, 0, 0.84, 0);
  transition-delay: calc(var(--i, 0) * 0.03s);
}

/* Current page: a small dot in the blue curtain tone */
.menu-overlay__link.active .menu-overlay__link-text::after {
  content: '';
  position: absolute;
  top: 0.2em;
  right: -0.22em;
  width: 0.12em;
  height: 0.12em;
  border-radius: 50%;
  background: var(--menu-accent);
}

.menu-overlay__link-desc {
  font-family: var(--font-body);
  font-size: 0.875rem;
  letter-spacing: 0.02em;
  line-height: 1.5;
  color: var(--color-inverse-muted);
  opacity: 0;
  transform: translateX(-8px);
}

.menu-overlay.is-open .menu-overlay__link-desc {
  opacity: 1;
  transform: none;
  transition: opacity 0.6s ease, transform 0.8s var(--ease-out);
  transition-delay: calc(0.7s + var(--i, 0) * 0.07s);
}

.menu-overlay.is-closing .menu-overlay__link-desc {
  transition: opacity 0.2s ease;
}

@media (hover: hover) {
  .menu-overlay__nav:hover .menu-overlay__link:not(:hover) { opacity: 0.32; }
  .menu-overlay__link:hover { transform: translateX(0.12em); }
}

/* Preview of the page behind the hovered link */
.menu-overlay__preview {
  align-self: center;
  position: relative;
  height: min(58vh, 560px);
  aspect-ratio: 4 / 5;
  border-radius: var(--radius);
  overflow: hidden;
  clip-path: inset(100% 0 0 0);
}

.menu-overlay.is-open .menu-overlay__preview {
  clip-path: inset(0);
  transition: clip-path 1.1s var(--ease-curtain) 0.45s;
}

.menu-overlay.is-closing .menu-overlay__preview {
  clip-path: inset(0 0 100% 0);
  transition: clip-path 0.5s var(--ease-curtain);
}

.menu-overlay__preview-item {
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: scale(1.08);
  transition: opacity 0.5s ease, transform 1.2s var(--ease-out);
}

.menu-overlay__preview-item.is-active {
  opacity: 1;
  transform: none;
}

.menu-overlay__preview-item .placeholder {
  position: absolute;
  inset: 0;
  min-height: 0;
}

/* Works preview flips through the case studies */
.menu-overlay__preview-cycle > .placeholder {
  opacity: 0;
  animation: menuCycle 3.6s linear infinite paused;
}

.menu-overlay__preview-cycle > .placeholder:first-child { opacity: 1; }
.menu-overlay__preview-cycle > .placeholder:nth-child(2) { animation-delay: 1.2s; }
.menu-overlay__preview-cycle > .placeholder:nth-child(3) { animation-delay: 2.4s; }

.menu-overlay__preview-cycle.is-active > .placeholder { animation-play-state: running; }

@keyframes menuCycle {
  0%, 33.32% { opacity: 1; }
  33.33%, 100% { opacity: 0; }
}

.menu-overlay__info {
  grid-column: 1 / -1;
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-sm) var(--space-md);
  padding-top: var(--space-md);
}

.menu-overlay__info::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: rgba(248, 249, 255, 0.18);
  transform: scaleX(0);
  transform-origin: left;
}

.menu-overlay.is-open .menu-overlay__info::before {
  transform: none;
  transition: transform 1.2s var(--ease-out) 0.55s;
}

.menu-overlay.is-closing .menu-overlay__info::before {
  transform-origin: right;
  transition: transform 0.4s ease-in;
}

.menu-overlay__info-col {
  opacity: 0;
  transform: translateY(12px);
}

.menu-overlay.is-open .menu-overlay__info-col {
  opacity: 1;
  transform: none;
  transition: opacity 0.6s ease, transform 0.8s var(--ease-out);
  transition-delay: calc(0.8s + var(--i, 0) * 0.06s);
}

.menu-overlay.is-closing .menu-overlay__info-col {
  transition: opacity 0.2s ease;
}

.menu-overlay .menu-overlay__info-label {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
  color: var(--color-inverse-muted);
}

.menu-overlay__info-label [data-time] {
  font-variant-numeric: tabular-nums;
}

.menu-overlay__info a,
.menu-overlay__status {
  font-size: 0.9375rem;
  line-height: 1.6;
}

.menu-overlay__info a {
  background: linear-gradient(currentColor, currentColor) left bottom / 0% 1px no-repeat;
  transition: background-size var(--duration-normal) var(--ease-out);
}

.menu-overlay__info a:hover { background-size: 100% 1px; }

.menu-overlay__status {
  display: flex;
  align-items: center;
  gap: 8px;
}

.menu-overlay__social {
  display: flex;
  flex-wrap: wrap;
  gap: 4px var(--space-sm);
}

body.menu-open { overflow: hidden; }

.nav{padding-inline:max(32px,calc((100vw - 1232px)/2));height:72px;gap:32px}
.nav:not(.nav--on-dark){background:transparent;backdrop-filter:none;-webkit-backdrop-filter:none;box-shadow:none}
.nav__logo{font-size:19px;letter-spacing:.06em;font-weight:700}
.site-nav-links{display:flex;gap:30px;margin-left:auto;font-size:14px;align-items:center}
.site-nav-links a{min-height:44px;display:flex;align-items:center;color:#55565d}
.site-nav-links a[aria-current],.site-nav-links a:hover{color:var(--color-accent-strong)}
.site-nav-links a:focus-visible{outline:2px solid var(--color-accent-strong);outline-offset:5px}
.nav--menu-open .site-nav-links{visibility:hidden}
.menu-overlay__preview img{width:100%;height:100%;object-fit:cover;border-radius:6px}
.nav,.menu-overlay{font-family:var(--font-body);line-height:1.6}.nav__menu-btn{border:0;background:none;cursor:pointer;font:inherit}.menu-overlay *{box-sizing:border-box}.menu-overlay a{text-decoration:none;color:inherit}.menu-overlay p{margin:0}body.menu-open{overflow:hidden}
@media(max-width:700px){.nav{padding-inline:24px;height:64px;gap:22px}.site-nav-links{gap:18px;font-size:13px}.site-nav-links a:last-child{display:none}.nav__menu-label{display:none}.menu-overlay__inner{display:flex;flex-direction:column;padding:88px 24px 24px}.menu-overlay__nav{align-self:stretch;flex:1}.menu-overlay__preview{display:none}.menu-overlay__link-desc{font-size:12px}.menu-overlay__info{grid-template-columns:1fr 1fr}.menu-overlay__info-col:last-child{display:none}}
@media(prefers-reduced-motion:reduce){.nav,.menu-overlay *{transition:none!important;animation:none!important}}
/* Keep the three direct links available at every screen size. */
.nav{isolation:isolate}
.nav.nav--hidden{transform:none}
.nav .nav__menu-btn{display:none}
.nav .site-nav-links a:last-child{display:flex}
.nav::before{content:'';position:absolute;inset:0 0 -24px;z-index:-1;pointer-events:none;background:linear-gradient(to bottom,rgba(255,255,255,.88) 0%,rgba(255,255,255,.66) 56%,rgba(255,255,255,.16) 82%,rgba(255,255,255,0) 100%);opacity:0;transition:opacity .3s ease}
.nav.nav--scrolled::before{opacity:1}