/* =====================================================================
   DESQUE — Industrial design studio
   IBM Plex Mono (info) + Helvetica Light (titles) / light + dark
   Editorial catalogue, floating adaptive header, minimal lightbox
   --------------------------------------------------------------------
   1. Tokens + theme
   2. Reset & base
   3. Layout primitives
   4. Masthead (floating, blend-mode)
   5. Covers / titles / description
   6. Wordmark (theme-adaptive mask)
   7. Homepage — about + contact
   8. Metadata list
   9. Photo essay / figures (static, clickable)
   10. Lightbox (minimal)
   11. Footer
   12. Theme switcher
   13. Motion / reveal
   14. Responsive
   ===================================================================== */

/* 1. TOKENS + THEME -------------------------------------------------- */
:root {
  /* palette */
  --ink:      #131313;
  --paper:    #f2f2f2;
  --paper-2:  #e8e8e8;
  --grey:     #888888;   /* tertiary / faint  */
  --grey-d:   #585858;   /* secondary / muted */

  /* semantic */
  --bg:       var(--paper);
  --fg:       var(--ink);
  --line:     var(--ink);      /* strong hairline, flips with theme */
  --line-soft:#888888;         /* soft hairline, legible in both    */
  --surface:  var(--paper-2);  /* image placeholder ground          */
  --lbx-bg:   #f2f2f2;

  /* type */
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", "SF Mono",
          Menlo, Consolas, "Liberation Mono", monospace;
  --helv: "Helvetica Neue", "Helvetica", "Arial", sans-serif;

  --fs-body:  clamp(0.80rem, 0.73rem + 0.30vw, 0.95rem);
  --fs-meta:  clamp(0.72rem, 0.68rem + 0.20vw, 0.84rem);
  --fs-cap:   clamp(0.66rem, 0.63rem + 0.14vw, 0.75rem);
  --fs-title: clamp(2.1rem, 1.1rem + 5.0vw, 5.25rem);
  --fs-mark:  clamp(0.72rem, 0.66rem + 0.30vw, 0.90rem);

  --lh-body: 1.62;
  --ls-caps: 0.045em;

  /* space */
  --gutter: clamp(20px, 5.2vw, 72px);
  --measure: 66ch;

  --sp-1: clamp(8px, 1.4vw, 14px);
  --sp-2: clamp(16px, 2.6vw, 28px);
  --sp-3: clamp(28px, 4.4vw, 52px);
  --sp-4: clamp(48px, 8vw, 104px);
  --sp-5: clamp(80px, 14vw, 190px);

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* dark tokens — applied for explicit choice, and for system-dark when
   no explicit light choice has been made (works without JS) */
:root[data-theme="dark"] {
  --ink:     #f2f2f2;
  --paper:   #131313;
  --paper-2: #585858;
  --grey:    #585858;
  --grey-d:  #888888;
  --line:     var(--ink);
  --line-soft:#585858;
  --lbx-bg:   #131313;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink:     #f2f2f2;
    --paper:   #131313;
    --paper-2: #585858;
    --grey:    #585858;
    --grey-d:  #888888;
    --line:     var(--ink);
    --line-soft:#585858;
    --lbx-bg:   #131313;
  }
}

/* theme transition — only while toggling (class added briefly by JS) */
html.theme-anim, html.theme-anim * {
  transition: background-color .25s var(--ease),
              color .25s var(--ease),
              border-color .25s var(--ease) !important;
}

/* 2. RESET & BASE ---------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--mono);
  font-size: var(--fs-body);
  font-weight: 400;
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-variant-ligatures: none;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
h1, h2, h3, h4, p, figure, blockquote, ul, ol, dl { margin: 0; }
ul, ol { list-style: none; padding: 0; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; padding: 0; }
::selection { background: var(--ink); color: var(--paper); }

:focus { outline: none; }
:focus-visible { outline: 1px solid var(--fg); outline-offset: 3px; }

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 400;
  background: var(--ink); color: var(--paper);
  padding: 8px 14px; font-size: var(--fs-cap);
  letter-spacing: var(--ls-caps); text-transform: uppercase;
}
.skip:focus { left: 12px; top: 12px; }

/* 3. LAYOUT PRIMITIVES ---------------------------------------------- */
.wrap { padding-inline: var(--gutter); }
.caps { text-transform: uppercase; letter-spacing: var(--ls-caps); }
.muted { color: var(--grey-d); }
main { display: block; }

/* 4. MASTHEAD — solid by default; transparent + white over the homepage hero */
.masthead {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  display: grid; grid-template-columns: 1fr auto 1fr;
  align-items: center; gap: var(--sp-2);
  padding: clamp(6px, 0.8vw, 10px) var(--gutter);   /* slim editorial bar */
  background: var(--bg);
  color: var(--fg);
  transition: background-color .3s var(--ease), color .3s var(--ease);
  pointer-events: none;            /* let clicks fall through the empty bar */
}
/* one thin bottom divider, inset to the content/image grid (gutter margins) */
.masthead::after {
  content: ""; position: absolute; left: var(--gutter); right: var(--gutter); bottom: 0;
  border-top: 1px solid var(--line);
  opacity: 1; transition: opacity .3s var(--ease);
  pointer-events: none;
}
/* HERO state — homepage, while the header sits over the hero video */
[data-header="hero"] .masthead { background: transparent; color: #fff; }
[data-header="hero"] .masthead::after { opacity: 0; }
.masthead a { pointer-events: auto; }
.mast__left  { justify-self: start; }
.mast__right { justify-self: end; text-align: right; }
.mast__left, .mast__right {
  font-size: var(--fs-meta);
  letter-spacing: var(--ls-caps);
  text-transform: uppercase;
  line-height: 1.25;
  max-width: 42ch;
}
.mast__left a, .mast__right a { display: inline-block; }
.masthead a:hover, .masthead a:focus-visible { text-decoration: underline; text-underline-offset: 3px; }
/* invisible placeholder — reserves the header logo's slot so the masthead
   keeps its height and the left/right text stays aligned with the logo */
.mast__logo-space { justify-self: center; width: clamp(80px, 7vw, 100px); aspect-ratio: 1160 / 601; pointer-events: none; }

/* ONE continuous DESQUE logo: hero identity <-> header logo, driven by scroll.
   Outer element stays mathematically centred in the viewport; the inner glyph
   translates up and scales down as scroll progresses (set via --bm-off/--bm-s). */
.brandmark {
  position: fixed; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: clamp(280px, 58vw, 900px);
  z-index: 105; line-height: 0;
  pointer-events: none;                    /* the large box is never a click target */
}
.brandmark__ink {
  display: block; width: 100%; aspect-ratio: 1160 / 601;
  background: var(--ink);                 /* solid header: theme ink */
  -webkit-mask: url(../img/brand/desque-wordmark-white-1160.png) center / contain no-repeat;
          mask: url(../img/brand/desque-wordmark-white-1160.png) center / contain no-repeat;
  transform: translateY(var(--bm-off, 0px)) scale(var(--bm-s, 1));
  transform-origin: center center;
  transition: background-color .3s var(--ease);
  will-change: transform;
  pointer-events: none;                    /* only the docked glyph is clickable (JS) */
}
[data-header="hero"] .brandmark__ink { background: #fff; }   /* white over the hero video */
@media (prefers-reduced-motion: reduce) { .brandmark__ink { will-change: auto; } }

/* 5. COVERS / TITLES / DESCRIPTION ---------------------------------- */
.cover {
  position: relative; min-height: 100svh;
  padding-block: clamp(96px, 16vh, 200px) var(--sp-3);
  display: grid;
}

/* homepage identity block */
.idblock {
  text-align: center;
  font-size: var(--fs-mark);
  line-height: 1.7;
  letter-spacing: var(--ls-caps);
  text-transform: uppercase;
}
.idblock span { display: block; }
.idblock .dim { color: var(--grey-d); }

/* large Helvetica Light project title */
.project-title {
  font-family: var(--helv);
  font-weight: 300;
  font-size: var(--fs-title);
  line-height: 1.03;
  letter-spacing: -0.005em;
  text-transform: uppercase;
  text-wrap: balance;
}

/* description paragraph — normal left-aligned flow, no rules */
.desc {
  max-width: var(--measure);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  text-align: left;
}

/* HOME cover: identity top, wordmark low */
.cover--home { grid-template-rows: auto 1fr; }
.cover--home .idblock { align-self: start; justify-self: center; }
.cover--home .cover__base { grid-row: 2; align-self: end; display: grid; row-gap: var(--sp-2); }
.cover--home .wordmark { margin-bottom: calc(-1 * clamp(4px, 1.1vw, 20px)); }

/* PROJECT HERO — compact asymmetric editorial composition */
.phero { padding-block: clamp(104px, 16vh, 168px) var(--sp-3); }
.phero__inner {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: var(--gutter);
  row-gap: clamp(20px, 3vw, 40px);
  align-items: start;
}
.phero__title { grid-column: 1 / -1; margin: 0; }
.phero__desc {
  grid-column: 7 / -1;          /* offset to the right, aligned to the right edge */
  max-width: 52ch;
  font-size: var(--fs-body);
  line-height: var(--lh-body);
}

/* 6. WORDMARK — theme-adaptive via mask ----------------------------- */
.wordmark { width: 100%; display: flex; justify-content: center; }
.wordmark__ink {
  display: block;
  width: clamp(260px, 66vw, 940px);
  aspect-ratio: 1160 / 601;
  background: var(--ink);
  -webkit-mask: url(../img/brand/desque-wordmark-white-1160.png) center / contain no-repeat;
          mask: url(../img/brand/desque-wordmark-white-1160.png) center / contain no-repeat;
}

/* 6b. VIDEO HERO ---------------------------------------------------- */
.hero {
  position: relative;
  width: 100%;
  height: 100svh;
  overflow: hidden;
  background: #131313;
}
.hero__video {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;               /* crop vertical footage into a wide frame */
  object-position: center;
  display: block;
}
.hero__logo {
  position: absolute; inset: 0;
  display: grid; place-items: center;
  padding: var(--gutter);
  pointer-events: none;
}
.hero__logo span {
  display: block;
  width: clamp(280px, 58vw, 900px);
  aspect-ratio: 1160 / 601;
  background: #fff;                 /* white wordmark reads over the industrial footage */
  -webkit-mask: url(../img/brand/desque-wordmark-white-1160.png) center / contain no-repeat;
          mask: url(../img/brand/desque-wordmark-white-1160.png) center / contain no-repeat;
  filter: drop-shadow(0 2px 34px rgba(0,0,0,0.42));  /* soft halo for legibility on lighter frames */
}

/* 7. HOMEPAGE — ABOUT + CONTACT ------------------------------------- */
.plate { padding-block: var(--sp-4); }
.plate figure { margin: 0; }

.about { padding-block: clamp(80px, 14vh, 180px); }
.about__grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: clamp(28px, 6vw, 96px);
  align-items: center;
}
.about__text {
  display: flex; flex-direction: column; justify-content: center;
  gap: var(--sp-2);
  max-width: 50ch;
}
.about__text .desc { max-width: none; }
.about__photo { margin: 0; }
.about__photo img {
  display: block;
  height: clamp(320px, 44vh, 470px);
  width: auto; max-width: 100%;
  background: var(--surface);
  cursor: zoom-in;
}

.contact-block { padding-block: var(--sp-4); }
.contact__body { display: grid; gap: var(--sp-2); font-size: var(--fs-body); }
.contact__row { display: grid; grid-template-columns: 16ch 1fr; gap: var(--sp-2); align-items: baseline; }
.contact__k { font-size: var(--fs-cap); letter-spacing: var(--ls-caps); text-transform: uppercase; color: var(--grey); }
.contact__v a { position: relative; }
.contact__v a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -3px;
  border-top: 1px solid var(--fg); transform: scaleX(0); transform-origin: left;
  transition: transform .35s var(--ease);
}
.contact__v a:hover::after, .contact__v a:focus-visible::after { transform: scaleX(1); }

.section-rule {
  display: flex; align-items: baseline; gap: 1.2ch;
  font-size: var(--fs-cap); letter-spacing: var(--ls-caps);
  text-transform: uppercase; color: var(--grey-d);
}
.section-rule::after { content: ""; flex: 1; border-top: 1px solid var(--line-soft); transform: translateY(-.3em); }

/* INQUIRIES — homepage, centred, large Helvetica title */
.inquiries { padding-block: clamp(72px, 13vh, 152px); text-align: center; }
.inquiries__inner {
  display: flex; flex-direction: column; align-items: center;
  gap: var(--sp-2);
  max-width: 48ch; margin-inline: auto;
}
.inq-title { margin: 0; }                 /* .project-title: Helvetica Light, uppercase, large */
.inquiries .desc { max-width: none; }
@media (min-width: 621px) { .inquiries .desc { white-space: nowrap; } }  /* one line on desktop */
.inq-email {
  margin-top: var(--sp-1);
  font-size: clamp(0.82rem, 0.78rem + 0.25vw, 1rem);
  line-height: 1.2; letter-spacing: 0;
  position: relative;
}
.inq-email::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -0.16em;
  border-top: 1px solid currentColor; transform: scaleX(0); transform-origin: center;
  transition: transform .35s var(--ease);
}
.inq-email:hover::after, .inq-email:focus-visible::after { transform: scaleX(1); }

/* 8. METADATA LIST --------------------------------------------------- */
.meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--sp-1) var(--sp-3);
  font-size: var(--fs-cap);
  letter-spacing: var(--ls-caps);
  text-transform: uppercase;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding-block: var(--sp-2);
}
.meta div { display: flex; gap: 1ch; }
.meta dt { color: var(--grey); white-space: nowrap; }
.meta dd { color: var(--fg); margin: 0; }
.meta--plain { border: 0; padding: 0; grid-template-columns: 1fr; gap: var(--sp-1); }

/* 9. PHOTO ESSAY / FIGURES — static, clickable ---------------------- */
.essay { padding-block: var(--sp-4); }
.essay > * + * { margin-top: var(--sp-4); }
/* a figure after another image element must keep its gap (beats figure.fig{margin:0}) */
.essay > .fig + .fig,
.essay > .pair + .fig { margin-top: var(--sp-4); }

figure.fig { margin: 0; position: relative; }
.fig__img { overflow: hidden; background: var(--surface); cursor: zoom-in; }
.fig__img img { width: 100%; height: auto; display: block; }

.figcap {
  margin-top: var(--sp-1);
  font-size: var(--fs-cap); letter-spacing: var(--ls-caps);
  text-transform: uppercase; color: var(--grey-d);
  display: flex; gap: 1.5ch; flex-wrap: wrap;
}
.figcap .c-n { color: var(--grey); }

/* wide figure — stays within the gutters so it never touches the viewport edge */
.fig--bleed { margin-inline: 0; }

.fig--inset { display: grid; }
.fig--inset.pos-left  { grid-template-columns: minmax(0, 62%) 1fr; }
.fig--inset.pos-right { grid-template-columns: 1fr minmax(0, 62%); }
.fig--inset.pos-left  .fig__img { grid-column: 1; }
.fig--inset.pos-right .fig__img { grid-column: 2; }
.fig--inset .figcap { grid-column: 1 / -1; }

.fig--small { max-width: min(340px, 60%); }
.fig--small.pos-right { margin-left: auto; }
.fig--mid { max-width: min(820px, 100%); margin-inline: auto; }

.pair { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gutter); align-items: start; }
.pair--offset { align-items: end; }

/* next-project link — minimal, no numbering */
.nextproj {
  padding-block: var(--sp-3);
  border-top: 1px solid var(--line);
  display: flex; align-items: baseline; gap: 1.6ch;
  font-size: var(--fs-cap); letter-spacing: var(--ls-caps); text-transform: uppercase;
  color: var(--grey-d);
}
.nextproj strong { font-weight: 400; color: var(--fg); font-size: var(--fs-meta); }
.nextproj a { display: flex; align-items: baseline; gap: 1.6ch; }
.nextproj a:hover strong { text-decoration: underline; text-underline-offset: 3px; }

/* 10. LIGHTBOX — full image floats over the softly blurred page ----- */
.lbx {
  position: fixed; inset: 0; z-index: 300;
  display: grid; place-items: center;
  background: color-mix(in srgb, var(--bg) 40%, transparent);  /* not a solid cover */
  -webkit-backdrop-filter: blur(9px);
          backdrop-filter: blur(9px);
  opacity: 0; visibility: hidden;
  transition: opacity .3s var(--ease), visibility .3s var(--ease);
  cursor: zoom-out;
}
.lbx[data-open="true"] { opacity: 1; visibility: visible; }
.lbx img {
  max-width: 90vw; max-height: 90vh;   /* whole image, never past the viewport */
  width: auto; height: auto; object-fit: contain;
  cursor: default;
  opacity: 0; transition: opacity .3s var(--ease);
}
.lbx img.ready { opacity: 1; }

/* 11. COLOPHON — compact footer, matches page ground ---------------- */
.colophon {
  background: var(--bg);
  color: var(--fg);
  border-top: 1px solid color-mix(in srgb, var(--fg) 22%, transparent);  /* one thin line */
  padding-block: clamp(26px, 4.2vh, 46px);
  margin-top: var(--sp-4);
}
.colophon a { color: var(--fg); position: relative; }
.colophon a:hover, .colophon a:focus-visible { text-decoration: underline; text-underline-offset: 3px; }
.colophon__grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: var(--gutter);
  row-gap: var(--sp-2);
  align-items: start;
}
.col { font-size: var(--fs-cap); line-height: 1.65; }
.col .lbl {
  display: block; margin-bottom: .5em;
  font-size: var(--fs-cap); letter-spacing: var(--ls-caps); text-transform: uppercase;
  color: var(--grey);
}
.col .val { display: block; text-transform: uppercase; letter-spacing: var(--ls-caps); }
.col .val--plain { text-transform: none; letter-spacing: 0; }

.col-mark  { grid-column: 1 / span 4; grid-row: 1; }
.col-mark .mk {
  display: block; width: clamp(104px, 11vw, 140px); aspect-ratio: 1160 / 601;
  background: var(--ink);
  -webkit-mask: url(../img/brand/desque-wordmark-white-1160.png) left center / contain no-repeat;
          mask: url(../img/brand/desque-wordmark-white-1160.png) left center / contain no-repeat;
}
.col-mark .role {
  display: block; margin-top: .8em;
  font-size: var(--fs-cap); letter-spacing: var(--ls-caps); text-transform: uppercase; color: var(--grey);
}
.col-place   { grid-column: 5 / span 3;  grid-row: 1; }
.col-contact { grid-column: 8 / span 3;  grid-row: 1; }
.col-ig      { grid-column: 11 / span 2; grid-row: 1; justify-self: end; text-align: right; }
.col-ig .val { text-transform: uppercase; }

/* 12. THEME ICON — single minimal glyph, adaptive via blend --------- */
.theme {
  position: fixed; right: var(--gutter); bottom: clamp(16px, 2.4vw, 24px); z-index: 110;
  line-height: 0;
  color: #fff;                     /* difference inverts against content */
  mix-blend-mode: difference;
}
.theme button { display: block; width: 17px; height: 17px; line-height: 0; }
.theme svg { width: 17px; height: 17px; display: block; }
.theme svg .fill { transition: transform .3s var(--ease); transform-origin: 12px 12px; }
.theme.is-dark svg .fill { transform: rotate(180deg); }
@media (prefers-reduced-motion: reduce) { .theme svg .fill { transition: none; } }

/* 13. MOTION / REVEAL ------------------------------------------------ */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 1s var(--ease), transform 1s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .08s; }
.reveal.d2 { transition-delay: .16s; }
.fade { opacity: 0; transition: opacity 1.1s var(--ease); }
.fade.in { opacity: 1; }
img.imgfade { opacity: 0; transition: opacity .9s var(--ease); }
img.imgfade.in { opacity: 1; }

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
  .reveal, .fade, img.imgfade { opacity: 1 !important; transform: none !important; transition: none !important; }
}

/* 14. RESPONSIVE ----------------------------------------------------- */
@media (max-width: 900px) {
  .about__grid { grid-template-columns: 1fr; gap: var(--sp-3); }
  .about__photo img { height: auto; width: min(78%, 420px); }
  .fig--inset, .fig--inset.pos-left, .fig--inset.pos-right { grid-template-columns: 1fr; }
  .fig--inset .fig__img { grid-column: 1 !important; }
  .fig--small, .fig--mid { max-width: 100%; }
  .phero__desc { grid-column: 1 / -1; }
  .col-mark { grid-column: 1 / -1; grid-row: 1; }
  .col-place { grid-column: 1 / span 6; grid-row: 2; }
  .col-contact { grid-column: 7 / -1; grid-row: 2; }
  .col-ig { grid-column: 1 / -1; grid-row: 3; justify-self: start; text-align: left; }
}

@media (max-width: 620px) {
  .masthead { gap: var(--sp-1); }
  .mast__left, .mast__right { font-size: 0.62rem; letter-spacing: 0.02em; line-height: 1.25; }
  .mast__logo img { width: clamp(84px, 22vw, 104px); }
  .cover { padding-block: clamp(120px, 20vh, 180px) var(--sp-2); }
  .pair, .pair--offset { grid-template-columns: 1fr; gap: var(--sp-3); align-items: start; }
  .contact__row { grid-template-columns: 1fr; gap: 4px; }
  .site-foot { grid-template-columns: 1fr; text-align: left; gap: var(--sp-1); }
  .site-foot__mid, .site-foot__end { text-align: left; }
  .meta { grid-template-columns: 1fr 1fr; }
  .colophon__grid { row-gap: var(--sp-2); }
  .col-place, .col-contact, .col-ig { grid-column: 1 / -1; }
  .col-place { grid-row: 2; }
  .col-contact { grid-row: 3; }
  .col-ig { grid-row: 4; }
}

@media (max-width: 400px) {
  .meta { grid-template-columns: 1fr; }
}