/* ---------------------------------------------------------------
   Reset & base
--------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

/* Hide content only when JS has not yet applied a stored non-default
   language (see js/i18n.js). If JS never runs, this class is never
   added, so no-JS visitors always see the English fallback markup. */
html.lang-pending body {
  visibility: hidden;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -100%;
  z-index: 100;
  background: var(--color-text);
  color: var(--color-bg);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ---------------------------------------------------------------
   Typography
--------------------------------------------------------------- */
h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 600;
  line-height: var(--lh-heading);
  letter-spacing: var(--ls-heading);
}

h2 {
  font-size: var(--fs-h2);
}

h3 {
  font-size: var(--fs-h3);
}

p {
  margin: 0;
}

.text-lead {
  font-size: var(--fs-body-lg);
  color: var(--color-text-muted);
}

.text-muted {
  color: var(--color-text-muted);
}

.meta {
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  letter-spacing: var(--ls-meta);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.display-hero {
  font-size: var(--fs-hero);
}

/* Editorial serif — reserved for pull quotes only. */
blockquote {
  margin: 0;
  font-family: var(--font-serif);
  font-size: var(--fs-h2);
  font-style: italic;
  letter-spacing: var(--ls-serif);
  line-height: 1.25;
  color: var(--color-text);
  border-left: 1px solid var(--color-accent);
  padding-left: var(--space-5);
}

.link-accent {
  color: var(--color-accent);
  text-underline-offset: 0.2em;
  text-decoration: underline;
  text-decoration-color: transparent;
  transition: text-decoration-color var(--transition-fast);
}

.link-accent:hover {
  text-decoration-color: currentColor;
}

/* ---------------------------------------------------------------
   Layout
--------------------------------------------------------------- */
.wrap {
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

.prose {
  max-width: var(--text-max);
}

.stack > * + * {
  margin-top: var(--space-5);
}

section {
  padding-block: var(--space-8);
}

@media (min-width: 48rem) {
  section {
    padding-block: var(--space-9);
  }
}

.section-heading {
  margin-bottom: var(--space-6);
}

/* Blueprint-style grid, decorative only — kept faint so it never competes
   with the hero text; fades out toward the bottom edge of the section. */
.hero {
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--color-grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--color-grid-line) 1px, transparent 1px);
  background-size: var(--space-7) var(--space-7);
  -webkit-mask-image: linear-gradient(to bottom, black, transparent);
  mask-image: linear-gradient(to bottom, black, transparent);
  pointer-events: none;
}

.hero > .wrap {
  position: relative;
}

/* ---------------------------------------------------------------
   Site header / nav
--------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-4);
}

.site-logo {
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  letter-spacing: var(--ls-meta);
  text-transform: uppercase;
}

.site-nav {
  display: none;
  align-items: center;
  gap: var(--space-6);
}

.site-nav a {
  font-size: var(--fs-meta);
  font-family: var(--font-mono);
  letter-spacing: var(--ls-meta);
  text-transform: uppercase;
  padding-bottom: var(--space-1);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  letter-spacing: var(--ls-meta);
  text-transform: uppercase;
}

.nav-toggle-bars {
  display: block;
  width: 20px;
  height: 1px;
  background: currentColor;
  position: relative;
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 1px;
  background: currentColor;
}

.nav-toggle-bars::before {
  top: -6px;
}

.nav-toggle-bars::after {
  top: 6px;
}

/* Desktop override must come after the base .site-nav / .nav-toggle rules
   above — same specificity, so source order decides the winner. */
@media (min-width: 60rem) {
  .site-nav {
    display: flex;
  }

  .nav-toggle {
    display: none;
  }
}

.site-nav-mobile {
  display: block;
  max-height: 0;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
  transition: max-height var(--transition-base);
}

.site-nav-mobile.is-open {
  max-height: 20rem;
}

.site-nav-mobile ul {
  padding: var(--space-4) var(--space-5) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.site-nav-mobile a {
  font-size: var(--fs-body-lg);
}

@media (min-width: 60rem) {
  .site-nav-mobile {
    display: none;
  }
}

.lang-toggle {
  display: inline-flex;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  letter-spacing: var(--ls-meta);
}

.lang-toggle button {
  padding: var(--space-1) var(--space-3);
  color: var(--color-text-muted);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.lang-toggle button[aria-pressed="true"] {
  color: var(--color-bg);
  background: var(--color-text);
}

/* Inside the mobile menu the toggle sits in a column flex list, which
   stretches it to full width by default. Rather than fight that, make it
   a deliberate full-width, 50/50 segmented control. */
.site-nav-mobile .lang-toggle {
  display: flex;
  width: 100%;
}

.site-nav-mobile .lang-toggle button {
  flex: 1;
  text-align: center;
}

.segmented-control {
  position: relative;
  display: flex;
  width: 100%;
  max-width: 26rem;
  margin-top: var(--space-6);
  border: 1px solid var(--color-border);
  padding: 3px;
}

.segmented-control button {
  position: relative;
  z-index: 1;
  flex: 1 1 0;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  letter-spacing: var(--ls-meta);
  text-transform: uppercase;
  text-align: center;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.segmented-control button:hover {
  color: var(--color-text);
}

.segmented-control button[aria-pressed="true"] {
  color: var(--color-bg);
}

.segmented-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: calc(50% - 3px);
  height: calc(100% - 6px);
  background: var(--color-text);
  transition: transform var(--transition-base);
}

.segmented-control[data-active="web"] .segmented-thumb {
  transform: translateX(100%);
}

@media (prefers-reduced-motion: reduce) {
  .segmented-thumb {
    transition: none;
  }
}

/* ---------------------------------------------------------------
   Buttons & tags
--------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-sm);
  font-size: var(--fs-meta);
  font-family: var(--font-mono);
  letter-spacing: var(--ls-meta);
  text-transform: uppercase;
  transition: transform var(--transition-fast), background var(--transition-fast);
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--color-text);
  color: var(--color-bg);
}

.btn-primary:hover {
  background: var(--color-accent);
}

.btn-secondary {
  border: 1px solid var(--color-border-strong);
  color: var(--color-text);
}

.btn-secondary:hover {
  border-color: var(--color-text);
}

.btn-arrow {
  gap: 0;
}

.btn-arrow-icon {
  width: 0;
  margin-left: 0;
  opacity: 0;
  overflow: hidden;
  flex-shrink: 0;
  transform: translateX(-6px);
  transition: width var(--transition-base), margin-left var(--transition-base),
    opacity var(--transition-base), transform var(--transition-base);
}

.btn-arrow:hover .btn-arrow-icon,
.btn-arrow:focus-visible .btn-arrow-icon {
  width: 16px;
  margin-left: var(--space-2);
  opacity: 1;
  transform: translateX(0);
}

.btn-mail-icon {
  flex-shrink: 0;
}

.btn-mail:hover .btn-mail-icon,
.btn-mail:focus-visible .btn-mail-icon {
  animation: btn-mail-shake 400ms ease-in-out;
}

@keyframes btn-mail-shake {
  0%, 100% {
    transform: translateX(0) rotate(0deg);
  }
  20% {
    transform: translateX(-2px) rotate(-8deg);
  }
  40% {
    transform: translateX(2px) rotate(8deg);
  }
  60% {
    transform: translateX(-1.5px) rotate(-5deg);
  }
  80% {
    transform: translateX(1.5px) rotate(5deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .btn-arrow-icon {
    transition: none;
  }

  .btn-mail:hover .btn-mail-icon,
  .btn-mail:focus-visible .btn-mail-icon {
    animation: none;
  }
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  letter-spacing: var(--ls-meta);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* ---------------------------------------------------------------
   Case study / project list items
--------------------------------------------------------------- */
.item-list > * + * {
  border-top: 1px solid var(--color-border);
}

.item-row {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding-block: var(--space-6);
}

.item-row-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2) var(--space-5);
}

.item-title {
  font-size: var(--fs-h3);
  font-weight: 600;
  flex: 1 1 18rem;
}

a.item-title:hover {
  color: var(--color-accent);
}

.item-row-head .meta {
  flex: 0 0 auto;
  margin-left: auto;
  white-space: nowrap;
}

.item-row .text-muted {
  max-width: var(--text-max);
}

.case-grid {
  display: grid;
  gap: var(--space-6);
}

@media (min-width: 48rem) {
  .case-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.case-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: border-color var(--transition-fast);
}

.case-card:hover {
  border-color: var(--color-text);
}

/* ---------------------------------------------------------------
   Footer
--------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-6);
}

.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.site-footer nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
}

.site-footer a {
  font-family: var(--font-mono);
  font-size: var(--fs-meta);
  letter-spacing: var(--ls-meta);
  text-transform: uppercase;
}

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

/* ---------------------------------------------------------------
   Scroll-reveal motion
--------------------------------------------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(var(--reveal-distance));
  transition: opacity var(--reveal-duration) cubic-bezier(0.16, 1, 0.3, 1),
    transform var(--reveal-duration) cubic-bezier(0.16, 1, 0.3, 1);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}