/* ==========================================================================
   LAYOUT — header, sections, grids, footer
   ========================================================================== */

/* ---------- Header ---------- */

.site-header {
  --brand-size: 15px;           /* size of the docked "NICK LANGLEY" */
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-inline: var(--gutter);
  transition:
    background-color var(--dur) var(--ease-out),
    border-color var(--dur) var(--ease-out);
  border-bottom: 1px solid transparent;
}

/* Invisible marker: the hero title docks at its left edge, centred on its line */
.site-header__dock {
  display: block;
  width: 1px;
  height: 1em;
  font-size: var(--brand-size);
}

.site-nav a {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  gap: clamp(20px, 3vw, 44px);
}

.site-nav a {
  position: relative;
  color: rgba(235, 233, 228, 0.72);
  transition: color var(--dur-fast) ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 0.28em; bottom: -6px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--dur) var(--ease-out);
}

.site-nav a:hover,
.site-nav a.is-active { color: var(--fg); }

.site-nav a:hover::after,
.site-nav a.is-active::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* After scrolling past the hero */
.site-header.is-scrolled {
  background: rgba(28, 29, 31, 0.82);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
}

/* ---------- Sections ---------- */

.section {
  position: relative;
  padding-block: var(--section-y);
  scroll-margin-top: 0;
}

.section--raised { background: var(--bg-raised); }
.section--light  { background: var(--bg-light); }

.section-head {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--grid-gap);
  padding-top: 28px;
  border-top: 1px solid var(--line);
  margin-bottom: clamp(56px, 8vw, 120px);
}

.section-head__index {
  grid-column: 1 / span 2;
  padding-top: 0.9em;
}

.section-head > div { grid-column: 3 / -1; }

.section-intro {
  margin-top: clamp(20px, 2.2vw, 32px);
  max-width: 44ch;
  font-size: clamp(1rem, 1.2vw, 1.125rem);
  font-weight: 300;
}

/* ---------- 01 · Selected work grid ---------- */

.work-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--grid-gap);
  row-gap: clamp(72px, 9vw, 150px);
  align-items: start;
}

.work--full   { grid-column: 1 / -1; }
.work--left   { grid-column: 1 / span 7; }
.work--right  { grid-column: 9 / -1; margin-top: clamp(80px, 14vw, 240px); }
.work--offset { grid-column: 3 / -1; }

.film-index {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--grid-gap);
  margin-top: clamp(112px, 13vw, 200px);
}

.film-index__heading { grid-column: 1 / span 2; padding-top: 30px; }
.film-index__list    { grid-column: 3 / -1; }

/* ---------- 03 · Cinematic & travel grid ---------- */

.travel-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--grid-gap);
  row-gap: clamp(64px, 8vw, 128px);
  align-items: end;
}

.travel--a    { grid-column: 1 / span 8; }
.travel--b    { grid-column: 9 / -1; }
.travel--c    { grid-column: span 4; align-self: start; }
.travel--full { grid-column: 1 / -1; }

/* ---------- 04 · About ---------- */

.about {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--grid-gap);
  row-gap: 56px;
  align-items: start;
}

.about__portrait { grid-column: 1 / span 5; }
.about__text     { grid-column: 7 / -1; }

.about__text p + p { margin-top: 1.6em; }

/* ---------- 05 · Contact ---------- */

.section--contact { padding-bottom: clamp(96px, 12vw, 180px); }

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--line);
}

.site-footer__inner {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding-block: 32px;
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--fg-dim);
}

.site-footer a { transition: color var(--dur-fast) ease; }
.site-footer a:hover { color: var(--fg); }
.site-footer__login {
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 10px 14px;
  margin-block: -10px;
  white-space: nowrap;
}
.site-footer__login:hover { border-color: var(--fg); }

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 1024px) {
  .work--right  { grid-column: 8 / -1; }
  .work--offset { grid-column: 2 / -1; }
}

@media (max-width: 760px) {
  :root { --header-h: 64px; }
  .site-header { --brand-size: 13px; }

  .section-head,
  .film-index,
  .about { display: block; }

  .section-head__index { display: block; margin-bottom: 18px; padding-top: 0; }

  .work-grid,
  .travel-grid { grid-template-columns: 1fr; }

  .work--full, .work--left, .work--right, .work--offset,
  .travel--a, .travel--b, .travel--c, .travel--full {
    grid-column: 1 / -1;
    margin-top: 0;
  }

  /* Portrait frames stay portrait but don't dominate the phone screen */
  .work--right, .travel--b { width: 78%; }
  .work--right { margin-left: auto; }

  .film-index__heading { display: block; padding-top: 0; margin-bottom: 20px; }

  .about__text { margin-top: 56px; }
  .about__portrait { width: 82%; }

  .site-footer__inner {
    flex-direction: column;
    gap: 12px;
  }
}

@media (max-width: 480px) {
  /* Docked name + three links must share one line on small phones */
  .site-header { --brand-size: 12px; }
  .site-nav a { font-size: 0.625rem; letter-spacing: 0.2em; }
  .site-nav { gap: 16px; }
}

@media (max-width: 359px) {
  /* Very narrow phones: a little more room between the name and the links */
  .site-header { --brand-size: 11px; }
  .site-nav a { letter-spacing: 0.14em; }
  .site-nav { gap: 14px; }
}