/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Base ── */
html, body {
  background: #f6f6f6;
  color: #000;
}

/* ── Typography helpers ── */
.t-switzer-medium  { font-family: 'Switzer', sans-serif; font-weight: 500; }
.t-switzer-light   { font-family: 'Switzer', sans-serif; font-weight: 300; }
.t-switzer-regular { font-family: 'Switzer', sans-serif; font-weight: 400; }
.t-mono-regular    { font-family: 'Geist Mono', monospace; font-weight: 400; }
.t-mono-medium     { font-family: 'Geist Mono', monospace; font-weight: 500; }
.t-mono-light      { font-family: 'Geist Mono', monospace; font-weight: 300; }
.t-jetbrains       { font-family: 'JetBrains Mono', monospace; font-weight: 400; }

/* ─────────────────────────
   HEADER
───────────────────────── */
.header {
  position: sticky;
  top: 0;
  width: 100%;
  height: 78px;
  box-sizing: border-box;
  background: #f6f6f6;
  border-bottom: 0.5px solid #000;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 max(20px, calc((100% - 1484px) / 2));
}

.site-name {
  font-family: 'Switzer', sans-serif;
  font-weight: 400;
  font-size: 36px;
  letter-spacing: -2.16px;
  color: #000;
  text-decoration: none;
  line-height: normal;
}

.header-nav {
  display: flex;
  gap: 51px;
  align-items: center;
}

.header-nav a {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 400;
  font-size: 20px;
  letter-spacing: -1.6px;
  color: #000;
  text-decoration: none;
  line-height: normal;
}

.header-nav a:hover { text-decoration: underline; }

/* ─────────────────────────
   PAGE WRAPPER
───────────────────────── */
.page-wrap {
  position: relative;
  max-width: 1920px;
  margin: 0 auto;
}

/* ─────────────────────────
   BACKGROUND GRID OVERLAY
───────────────────────── */
.grid-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.grid-rail,
.grid-col {
  position: absolute;
  top: 0; bottom: 0;
  width: 0.5px;
}

.grid-rail { background: #000; }
.grid-col  { background: rgba(0, 0, 0, 0.5); }

.grid-rail--left  { left: 200px; }
.grid-rail--right { right: 200px; }
.grid-col--1 { left: 580px; }
.grid-col--2 { left: 960px; }
.grid-col--3 { left: 1340px; }

/* ─────────────────────────
   SECTION DIVIDERS
───────────────────────── */
.section-divider {
  position: relative;
  height: 0.5px;
  background: #000;
  margin: 0 200px;
}

.divider-mark {
  position: absolute;
  top: -5.5px;
  width: 11px; height: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Geist Mono', monospace;
  font-weight: 300;
  font-size: 11px;
  line-height: 1;
  color: #000;
  user-select: none;
}
.divider-mark::before { content: '+'; }
.divider-mark--left  { left:  -5.5px; }
.divider-mark--right { right: -5.5px; }

/* ─────────────────────────
   CASE STUDY HEADER BOX
───────────────────────── */
.cs-header-box {
  position: relative;
  border-left: 0.5px solid #000;
  border-right: 0.5px solid #000;
  border-bottom: 0.5px solid #000;
  margin: 0 200px;
  padding: 148px 18px 18px;
}

.corner-cross {
  position: absolute;
  bottom: -5.5px;
  width: 11px; height: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Geist Mono', monospace;
  font-weight: 300;
  font-size: 11px;
  line-height: 1;
  color: #000;
  user-select: none;
  z-index: 1;
}
.corner-cross::before { content: '+'; }
.corner-cross--left  { left:  -5.5px; }
.corner-cross--right { right: -5.5px; }

.cs-header-inner {
  display: grid;
  grid-template-columns: 1fr 344px;
  column-gap: 36px;
  align-items: end;
}

.cs-project-detail {
  display: flex;
  flex-direction: column;
  gap: 34px;
  align-self: start;
}

.cs-date-row {
  display: flex;
  align-items: center;
  gap: 11px;
  font-size: 16px;
  line-height: normal;
  white-space: nowrap;
}

.cs-title {
  font-family: 'Switzer', sans-serif;
  font-weight: 500;
  font-size: 128px;
  line-height: 1;
  letter-spacing: -3.84px;
  color: #000;
}

.cs-desc {
  font-size: 16px;
  letter-spacing: -1.28px;
  line-height: normal;
  color: #000;
  align-self: end;
  padding-bottom: 2px;
}

/* ─────────────────────────
   WORK THUMBNAIL GRID
   Thumbnails span x=218–951 (left) and x=969–1702 (right)
   → margin: 0 218px, gap: 18px, two equal columns
───────────────────────── */
.work-grid {
  margin: 0 218px;
}

.work-thumb-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.work-thumb {
  position: relative;
  overflow: hidden;
  background: #000;
  aspect-ratio: 733 / 412;
  display: block;
}

.work-thumb img,
.work-thumb video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Video hidden by default; shown on hover via JS */
.work-thumb video { display: none; }

a.work-thumb { cursor: pointer; }

.work-label-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.work-label {
  font-size: 20px;
  line-height: normal;
  color: #000;
  white-space: nowrap;
}

/* ─────────────────────────
   FOOTER
───────────────────────── */
.footer {
  margin: 0 218px;
}

.footer-headline {
  font-size: 96px;
  letter-spacing: -2.88px;
  line-height: normal;
  color: #000;
  white-space: nowrap;
}

.footer-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 36px;
}

.footer-left {
  display: flex;
  flex-direction: column;
}

.footer-contact {
  display: block;
  font-size: 20px;
  line-height: normal;
  color: #000;
  white-space: nowrap;
  text-decoration: none;
}

.footer-contact + .footer-contact { margin-top: 45px; }
.footer-contact:hover { text-decoration: underline; }

.footer-bottom-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.footer-credits {
  font-size: 12px;
  line-height: normal;
  color: #000;
  display: flex;
  flex-direction: column;
  gap: 16.5px;
}

.back-to-top {
  font-family: 'Geist Mono', monospace;
  font-weight: 300;
  font-size: 20px;
  line-height: normal;
  color: #000;
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
}

.back-to-top:hover { text-decoration: underline; }

/* ─────────────────────────
   SPACING TOKENS
───────────────────────── */
.mt-xs  { margin-top: 16px; }
.mt-18  { margin-top: 18px; }
.mt-sm  { margin-top: 24px; }
.mt-md  { margin-top: 40px; }
.mt-lg  { margin-top: 56px; }
.mt-xl  { margin-top: 80px; }
.mt-2xl { margin-top: 120px; }
.mb-sm  { margin-bottom: 24px; }
.mb-md  { margin-bottom: 40px; }