/* =================================================================
   SemVi Company Site — base rules (light register)
   Composition: titles low-left · text-left/image-right ·
   ≥ 1/3 of every section empty · one accent per section ·
   no gradients, no shadows · images never stretched.
   ================================================================= */

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--sv-white);
  color: var(--sv-ink);
  font-family: var(--sv-body);
  font-weight: 300;
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
video { max-width: 100%; display: block; object-fit: cover; }

/* all imagery rests in black & white; colour is earned on hover ------ */
img, video {
  filter: grayscale(1);
  transition: filter .45s ease;
}
img:hover, video:hover { filter: grayscale(0); }
@media (prefers-reduced-motion: reduce) {
  img, video { transition: none; }
}

/* nav — quiet, always visible, 60% white over content ---------------- */
.sv-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: var(--sv-s2) var(--sv-rail);
  background: rgba(255, 255, 255, .6);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}
.sv-nav__brand {
  font-family: var(--sv-head);
  font-weight: 600;
  font-size: .9rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--sv-ink);
  text-decoration: none;
}
.sv-nav__links { display: flex; gap: var(--sv-s3); }
.sv-nav__links a {
  font-family: var(--sv-head);
  font-weight: 400;
  font-size: .78rem;
  letter-spacing: .08em;
  text-transform: lowercase;
  color: var(--sv-caption);
  text-decoration: none;
}
.sv-nav__links a[aria-current="page"],
.sv-nav__links a:hover { color: var(--sv-ink); }

/* generic section --------------------------------------------------- */
.sv-section { padding: var(--sv-s5) var(--sv-rail); }

/* title band: title lower-left, full viewport feel ------------------ */
.sv-cover {
  min-height: 80vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--sv-s5) var(--sv-rail) var(--sv-s4);
}
.sv-cover__title {
  font-family: var(--sv-head);
  font-weight: 600;
  font-size: clamp(2.2rem, 6vw, 4.5rem);
  letter-spacing: .18em;
  text-transform: uppercase;
  line-height: 1.05;
  margin: 0;
}
.sv-cover__sub {
  font-family: var(--sv-head);
  font-weight: 300;
  font-size: clamp(1rem, 2vw, 1.35rem);
  letter-spacing: .06em;
  text-transform: lowercase;
  color: var(--sv-caption);
  margin: var(--sv-s2) 0 0;
}

/* kicker: small bold uppercase label over light body ----------------- */
.sv-kicker {
  font-family: var(--sv-head);
  font-weight: 600;
  font-size: 1.08rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--sv-ink);
  margin: 0 0 var(--sv-s2);
}

/* data list: one fact per line, left-aligned, smaller than body ------ */
.sv-datalist {
  font-size: .85rem;
  font-weight: 600;
  line-height: 2;
  margin: 0 0 var(--sv-s2);
}

/* two-column: text left (~45%), image right (~50%) ------------------ */
.sv-split {
  display: grid;
  grid-template-columns: minmax(0, 45fr) minmax(0, 50fr);
  gap: var(--sv-s4);
  align-items: start;
}
.sv-split__text { max-width: var(--sv-measure); }
.sv-split__text p { margin: 0 0 var(--sv-s2); }

/* full-bleed image band --------------------------------------------- */
.sv-band { padding: 0; }
.sv-band__img {
  width: 100%;
  aspect-ratio: 16 / 7;      /* FULL frame — pre-crop, never stretch */
  object-fit: cover;
}
.sv-band__cap {
  padding: var(--sv-s1) var(--sv-rail);
  font-size: .72rem;
  letter-spacing: .08em;
  text-transform: lowercase;
  color: var(--sv-caption);
}

/* tile grid (4:5) ---------------------------------------------------- */
.sv-tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--sv-s3);
}
.sv-tiles img { aspect-ratio: 4 / 5; object-fit: cover; width: 100%; }

/* pull-quote band (parchment + sage mark) ---------------------------- */
.sv-quote {
  background: var(--sv-parchment);
  padding: var(--sv-s4) var(--sv-rail);
}
.sv-quote blockquote {
  position: relative;
  font-family: var(--sv-head);
  font-weight: 300;
  font-style: italic;
  font-size: clamp(1.8rem, 3.8vw, 2.9rem);
  line-height: 1.4;
  max-width: var(--sv-measure);
  margin: 0;
  padding-left: var(--sv-s4);
}
.sv-quote blockquote::before {
  content: "\201C";
  position: absolute; left: 0; top: -.15em;
  font-size: 3em;
  line-height: 1;
  color: var(--sv-sage);
  font-style: normal;
}

/* link arrow --------------------------------------------------------- */
.sv-link {
  font-family: var(--sv-head);
  font-weight: 400;
  font-size: .85rem;
  letter-spacing: .08em;
  text-transform: lowercase;
  color: var(--sv-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--sv-sage);
  padding-bottom: .15em;
}
.sv-link:hover { border-bottom-width: 2px; }

/* footer — small grey, understated ----------------------------------- */
.sv-footer {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sv-s1);
  padding: var(--sv-s3) var(--sv-rail);
  border-top: 1px solid var(--sv-hairline);
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--sv-caption);
}
.sv-footer a { color: var(--sv-caption); text-decoration: none; }
.sv-footer a:hover { color: var(--sv-ink); }

/* placeholder frames (dev only — removed when real images land) ------ */
.sv-placeholder {
  background: var(--sv-parchment);
  border: 1px solid var(--sv-hairline);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--sv-caption);
  font-size: .72rem;
  letter-spacing: .1em;
  text-transform: lowercase;
}

/* motion: none at v1; if added later, honour reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

/* mobile -------------------------------------------------------------- */
@media (max-width: 640px) {
  .sv-section { padding: var(--sv-s4) var(--sv-rail); }
  .sv-split { grid-template-columns: 1fr; gap: var(--sv-s3); }
  .sv-cover { min-height: 60vh; }
  .sv-nav__links { gap: var(--sv-s2); }
}