/* Pages dossier Chroma Labs : même système que l'accueil. 80 % de blanc, chanfrein du Delta, labels mono, une seule rupture en encre (la suite). */
:root {
  --sterile: #F5F6F7; --paillasse: #E9EBEE; --hairline: #E2E4E8; --instrument: #C6CAD0;
  --acier: #5F656E; --ardoise: #3E434A; --encre: #0D0E10; --nuit: #050506; --echo: #7A8089;
  --sans: "Geist", "Helvetica Neue", Arial, sans-serif;
  --mono: "Geist Mono", ui-monospace, Menlo, monospace;
  --gutter: clamp(20px, 7vw, 128px);
  --chamfer-sm: 10px; --chamfer-md: 14px; --chamfer-lg: 44px;
  color-scheme: light;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--sterile); color: var(--encre); font-family: var(--sans); font-size: 15px; line-height: 1.5; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
img, video { max-width: 100%; display: block; }
a { color: inherit; }
::selection { background: var(--encre); color: var(--sterile); }
:focus-visible { outline: 2px solid var(--encre); outline-offset: 3px; }
h1, h2, h3 { font-weight: 500; margin: 0; text-wrap: balance; }
p { margin: 0; }

.wrap { padding-left: max(var(--gutter), env(safe-area-inset-left, 0px)); padding-right: max(var(--gutter), env(safe-area-inset-right, 0px)); max-width: 1440px; margin-inline: auto; }
.label { font-family: var(--mono); font-size: 11px; line-height: 1.4; letter-spacing: .18em; text-transform: uppercase; color: var(--acier); }
.label--strong { color: var(--encre); }
.echo { color: var(--echo); }

/* Navigation */
.nav { position: fixed; left: 0; right: 0; top: 0; padding-top: env(safe-area-inset-top, 0px); z-index: 20; }
.nav__in { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding-block: 22px; flex-wrap: wrap; }
.wordmark { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
.wordmark svg { fill: var(--encre); display: block; }
.wordmark span { font-size: 16px; font-weight: 500; letter-spacing: -.03em; }
.nav__links { display: flex; align-items: center; gap: clamp(16px, 3vw, 36px); flex-wrap: wrap; }
.nav__links a:not(.btn) { font-size: 14px; text-decoration: none; }
.nav__links a:not(.btn):hover { color: var(--acier); }
.edge { position: fixed; left: 0; right: 0; top: 0; height: 120px; pointer-events: none; z-index: 19; backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); -webkit-mask-image: linear-gradient(to bottom, #000 30%, transparent); mask-image: linear-gradient(to bottom, #000 30%, transparent); background: linear-gradient(to bottom, rgba(245,246,247,.86), rgba(245,246,247,0)); }

/* Bouton métal liquide (même recette que l'accueil) */
@property --a { syntax: '<angle>'; inherits: false; initial-value: 0deg; }
.btn { --a: 0deg; position: relative; display: inline-flex; padding: 1.5px; border: 0; cursor: pointer; text-decoration: none; line-height: 1;
  background: conic-gradient(from var(--a), #0D0E10 0deg, #5F656E 30deg, #F5F6F7 62deg, #8A9099 95deg, #FFFFFF 128deg, #2B2E33 168deg, #C6CAD0 208deg, #FFFFFF 246deg, #4A4F57 288deg, #E2E4E8 326deg, #0D0E10 360deg);
  clip-path: polygon(0 0, calc(100% - var(--chamfer-sm)) 0, 100% var(--chamfer-sm), 100% 100%, 0 100%); animation: spin 14s linear infinite; }
.btn:hover { animation-duration: 2s; }
@keyframes spin { to { --a: 360deg; } }
.btn__in { display: inline-flex; align-items: center; gap: 8px; font-size: 15px; font-weight: 500; padding: 16px 26px;
  clip-path: polygon(0 0, calc(100% - var(--chamfer-sm) + 1px) 0, 100% calc(var(--chamfer-sm) - 1px), 100% 100%, 0 100%); }
.btn--primary .btn__in { background: var(--encre); color: var(--sterile); }
.btn--secondary .btn__in { background: var(--sterile); color: var(--encre); font-family: var(--mono); font-size: 11px; letter-spacing: .18em; text-transform: uppercase; padding: 12px 18px; }
.btn--light .btn__in { background: var(--sterile); color: var(--encre); }
.link { font-size: 15px; text-decoration: none; border-bottom: 1px solid currentColor; padding-bottom: 2px; }
.link:hover { color: var(--acier); }
.hint { font-family: var(--mono); font-size: 11px; letter-spacing: .18em; text-transform: uppercase; color: var(--acier); text-decoration: none; }
.hint:hover { color: var(--encre); }

/* Cadres chanfreinés */
.frame { position: relative; overflow: hidden; background: var(--paillasse); clip-path: polygon(0 0, calc(100% - var(--chamfer-md)) 0, 100% var(--chamfer-md), 100% 100%, 0 100%); }
.frame img, .frame video { width: 100%; height: 100%; object-fit: cover; }
.frame--45 { aspect-ratio: 4 / 5; }
.frame--916 { aspect-ratio: 9 / 16; }
.frame--34 { aspect-ratio: 3 / 4; }
.frame--wide { aspect-ratio: 16 / 9; }
.frame--free img { height: auto; }
.fig { display: flex; flex-direction: column; gap: 10px; min-width: 0; margin: 0; }
.fig figcaption { display: flex; justify-content: space-between; gap: 16px; }

/* Repère de mise en registre */
.reg-host { position: relative; }
.regmark { position: absolute; left: -18px; top: -18px; display: flex; align-items: center; gap: 8px; pointer-events: none; z-index: 4; }
.regmark i { position: relative; width: 14px; height: 14px; display: block; }
.regmark i::before, .regmark i::after { content: ""; position: absolute; background: var(--encre); }
.regmark i::before { left: 6.5px; top: 0; width: 1px; height: 14px; }
.regmark i::after { top: 6.5px; left: 0; height: 1px; width: 14px; }
.regmark span { font-family: var(--mono); font-size: 10px; letter-spacing: .12em; color: var(--acier); }

/* En-tête du dossier */
#top { padding-top: 76px; }
.p-hero { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: 96px; align-items: end; padding-block: clamp(72px, 10vw, 150px) clamp(96px, 12vw, 180px); }
.p-hero__text { display: flex; flex-direction: column; gap: 40px; min-width: 0; }
.p-hero h1 { font-size: clamp(42px, 5.4vw, 80px); line-height: 1; letter-spacing: -.045em; }
.p-lead { font-size: clamp(17px, 1.5vw, 21px); line-height: 1.3; font-weight: 500; letter-spacing: -.025em; max-width: 560px; }
.p-hero__media { width: 100%; max-width: 520px; justify-self: end; }
.status { display: inline-flex; align-items: center; gap: 10px; align-self: flex-start; }
.status i { width: 7px; height: 7px; background: var(--encre); clip-path: polygon(0 0, 100% 0, 100% 100%); }
.status--concept i { background: none; box-shadow: inset 0 0 0 1px var(--encre); clip-path: none; }
.facts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px 36px; margin: 0; max-width: 620px; }
.facts div { border-top: 1px solid var(--instrument); padding-top: 12px; display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.facts dt { font-family: var(--mono); font-size: 10px; letter-spacing: .16em; text-transform: uppercase; color: var(--acier); }
.facts dd { margin: 0; font-size: 14px; line-height: 1.45; }

/* Blocs de texte */
.p-block { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); gap: 96px; padding-block: clamp(96px, 12vw, 176px); border-top: 1px solid var(--hairline); }
.p-block__body { display: flex; flex-direction: column; gap: 24px; max-width: 620px; }
.p-block h2 { font-size: clamp(28px, 3.4vw, 48px); line-height: 1.02; letter-spacing: -.045em; }
.p-block p { font-size: 15.5px; line-height: 1.65; color: var(--ardoise); }
.p-block p.big { font-size: clamp(17px, 1.4vw, 20px); line-height: 1.45; color: var(--encre); letter-spacing: -.015em; }
.tags { display: flex; gap: 10px; flex-wrap: wrap; }
.tags span { font-family: var(--mono); font-size: 11px; letter-spacing: .14em; text-transform: uppercase; padding: 8px 10px; box-shadow: inset 0 0 0 1px var(--instrument); }

/* Galeries */
.g { display: grid; gap: 16px; padding-bottom: clamp(96px, 12vw, 176px); }
.g--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.g--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.g--offset > :nth-child(2) { margin-top: 128px; }
.g--offset3 > :nth-child(2) { margin-top: 96px; }
.g--offset3 > :nth-child(3) { margin-top: 192px; }
.g--narrow { max-width: 1040px; margin-inline: auto; }

/* Bloc vidéo : chapitre d'un dossier multi-projets */
.chapter { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr); gap: 96px; padding-block: clamp(96px, 12vw, 176px); border-top: 1px solid var(--hairline); align-items: start; }
.chapter__text { display: flex; flex-direction: column; gap: 20px; position: sticky; top: 120px; max-width: 460px; }
.chapter__text h2 { font-size: clamp(26px, 3vw, 42px); line-height: 1.02; letter-spacing: -.04em; }
.chapter__text p { color: var(--ardoise); line-height: 1.65; }
.chapter__media { display: grid; gap: 16px; }
.chapter__media.g--3 > *:nth-child(2) { margin-top: 64px; }
.chapter__media.g--3 > *:nth-child(3) { margin-top: 128px; }

/* Crédits */
.credits { list-style: none; margin: 0; padding: 0; }
.credits li { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr); gap: 24px; padding-block: 16px; border-top: 1px solid var(--hairline); font-size: 14px; }
.credits li span:first-child { font-family: var(--mono); font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--acier); padding-top: 3px; }

/* Dossier suivant : la seule rupture en encre */
.next { display: block; position: relative; overflow: hidden; background: var(--encre); color: var(--sterile); text-decoration: none; clip-path: polygon(0 0, calc(100% - 64px) 0, 100% 64px, 100% 100%, 0 100%); }
.next__in { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, .7fr); gap: 72px; align-items: center; padding-block: clamp(80px, 10vw, 150px); }
.next .label { color: #8A9099; }
.next__title { font-size: clamp(40px, 6vw, 92px); line-height: .95; letter-spacing: -.05em; font-weight: 500; margin-top: 18px; }
.next__title .echo { color: #8A9099; }
.next__media { max-width: 300px; justify-self: end; width: 100%; }
.next__go { margin-top: 32px; display: inline-flex; gap: 10px; font-family: var(--mono); font-size: 11px; letter-spacing: .18em; text-transform: uppercase; color: #C6CAD0; }
.next:hover .next__go { color: var(--sterile); }
.next:hover .next__media video { transform: scale(1.04); }
.next__media video { transition: transform 1s cubic-bezier(.2,.7,.2,1); }

footer { padding-block: 56px 64px; }
.foot { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; align-items: center; }
.grain { position: fixed; inset: 0; pointer-events: none; z-index: 50; mix-blend-mode: multiply; opacity: .05; }

@media (max-width: 900px) {
  .p-hero, .p-block, .chapter, .next__in { grid-template-columns: 1fr; gap: 40px; }
  .p-hero__media { justify-self: start; }
  .chapter__text { position: static; }
  .g--3, .g--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .g--offset > :nth-child(2), .g--offset3 > *, .chapter__media.g--3 > * { margin-top: 0 !important; }
  .next__media { justify-self: start; max-width: 200px; }
  .credits li { grid-template-columns: 1fr; gap: 4px; }
}
@media (max-width: 560px) { .g--2, .g--3, .g--4 { grid-template-columns: 1fr; } .facts { grid-template-columns: 1fr; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .btn { animation: none; } * { transition: none !important; } }
.chapter__media.g { padding-bottom: 0; }

/* Semi 3D et lumière qui suit la main (même effet que le monolithe de l'accueil) */
.tilt { will-change: transform; transform-style: preserve-3d; --mx: 50%; --my: 50%; --so: 0; }
.tilt::before, .tilt::after { content: ""; position: absolute; inset: 0; pointer-events: none; opacity: var(--so); z-index: 2; }
.tilt::before { background: radial-gradient(260px circle at var(--mx) var(--my), rgba(255,255,255,.34), rgba(255,255,255,0) 62%); }
.tilt::after { padding: 1px; background: radial-gradient(220px circle at var(--mx) var(--my), rgba(13,14,16,.6), rgba(13,14,16,0) 65%); -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask: linear-gradient(#000 0 0) content-box exclude, linear-gradient(#000 0 0); }
.next .tilt::after { background: radial-gradient(220px circle at var(--mx) var(--my), rgba(245,246,247,.7), rgba(245,246,247,0) 65%); }

/* Survol des lignes de crédits et des faits */
.credits li { position: relative; }
.credits li::before { content: ""; position: absolute; left: 0; right: 0; top: -1px; height: 1px; background: var(--encre); transform: scaleX(0); transform-origin: left; transition: transform .7s cubic-bezier(.2,.7,.2,1); }
.credits li > :last-child { transition: transform .55s cubic-bezier(.2,.7,.2,1); }
.credits li:hover::before { transform: scaleX(1); }
.credits li:hover > :last-child { transform: translateX(10px); }
.credits li:hover span:first-child { color: var(--encre); }
@media (hover: none) { .credits li::before { display: none; } }

/* Fragile Base : mur de boucles, films avec le son, méthode */
.frame--11 { aspect-ratio: 1 / 1; }
.wall-sec { padding-block: clamp(80px, 10vw, 150px); border-top: 1px solid var(--hairline); display: flex; flex-direction: column; gap: 40px; }
.wall-head { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); gap: 96px; align-items: baseline; }
.wall-lead { font-size: clamp(20px, 2.2vw, 30px); line-height: 1.15; letter-spacing: -.035em; max-width: 640px; }
.wall { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; }
.wall__cell:nth-child(4n+2) { transform: translateY(32px); }
.wall__cell:nth-child(4n+4) { transform: translateY(-24px); }
.filmrow { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: 16px; align-items: start; }
.film { max-width: 420px; width: 100%; }
.film video { background: var(--nuit); }
.method li { grid-template-columns: 40px minmax(0, 1fr); }
.method li span:last-child { color: var(--ardoise); line-height: 1.6; font-size: 15px; }
.method li b { color: var(--encre); font-weight: 500; display: block; margin-bottom: 2px; }
@media (max-width: 900px) {
  .wall-head, .filmrow { grid-template-columns: 1fr; gap: 24px; }
  .wall { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .wall__cell { transform: none !important; }
}

/* Langue : FR / EN */
.lang { display: inline-flex; align-items: center; gap: 6px; font-family: var(--mono); font-size: 11px; letter-spacing: .14em; color: var(--instrument); }
.lang button { all: unset; cursor: pointer; padding: 6px 2px; color: var(--instrument); transition: color .3s; }
.lang button:hover, .lang button[aria-pressed="true"] { color: var(--encre); }
.lang button:focus-visible { outline: 1px solid var(--encre); outline-offset: 2px; }

.foot__legal { text-decoration: none; transition: color .2s; }
.foot__legal:hover { color: var(--encre); }

/* Brief écrit : formulaire en 4 étapes, dans la DA */
.brief-page { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 96px; padding-block: 72px clamp(96px, 12vw, 176px); border-top: 1px solid var(--hairline); }
.bside { position: sticky; top: 120px; align-self: start; }
.bsteps { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; }
.bsteps li { display: flex; gap: 14px; padding-block: 10px; font-family: var(--mono); font-size: 11px; letter-spacing: .16em; text-transform: uppercase; color: var(--instrument); transition: color .4s; }
.bsteps li.is-done { color: var(--acier); }
.bsteps li.is-on { color: var(--encre); }
.bbar { height: 1px; margin-top: 20px; background: var(--hairline); position: relative; overflow: hidden; }
.bbar i { position: absolute; inset: 0; background: var(--encre); transform-origin: left; transform: scaleX(.25); transition: transform .8s cubic-bezier(.2,.7,.2,1); }
.bmain { max-width: 720px; min-width: 0; }
.bstep { border: 0; margin: 0; padding: 0; min-width: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 34px 24px; animation: bIn .6s cubic-bezier(.2,.7,.2,1); }
.bstep[hidden], .bform[hidden], .bdone[hidden] { display: none; }
@keyframes bIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
.bstep__head { grid-column: 1 / -1; display: flex; flex-direction: column; gap: 16px; margin-bottom: 6px; }
.bstep__head h2 { font-size: clamp(30px, 3.6vw, 52px); line-height: 1; letter-spacing: -.045em; font-weight: 500; }
.bf { display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.bf--full { grid-column: 1 / -1; }
.bf input[type=text], .bf input[type=email], .bf input[type=tel], .bf textarea { font: inherit; font-size: 16px; color: var(--encre); background: transparent; border: 0; border-bottom: 1px solid var(--instrument); border-radius: 0; padding: 6px 0 10px; outline: none; width: 100%; transition: border-color .3s; }
.bf textarea { resize: vertical; min-height: 110px; line-height: 1.5; }
.bf input:focus, .bf textarea:focus { border-bottom-color: var(--encre); }
.bchips { display: flex; flex-wrap: wrap; gap: 8px; }
.bchips label { position: relative; cursor: pointer; }
.bchips input { position: absolute; opacity: 0; pointer-events: none; }
.bchips span { display: inline-block; font-family: var(--mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; padding: 11px 14px; color: var(--acier); box-shadow: inset 0 0 0 1px var(--instrument); clip-path: polygon(0 0, calc(100% - 7px) 0, 100% 7px, 100% 100%, 0 100%); transition: background .3s, color .3s, box-shadow .3s; }
.bchips label:hover span { color: var(--encre); box-shadow: inset 0 0 0 1px var(--encre); }
.bchips input:checked + span { background: var(--encre); color: var(--sterile); box-shadow: none; }
.bchips input:focus-visible + span { outline: 2px solid var(--encre); outline-offset: 2px; }
.bf.is-bad > .label { color: var(--encre); }
.bf.is-bad input, .bf.is-bad textarea { border-bottom: 1.5px solid var(--encre); }
.bf.is-bad .bchips span { box-shadow: inset 0 0 0 1px var(--encre); }
.bnote { grid-column: 1 / -1; font-size: 13px; line-height: 1.6; color: var(--acier); }
.bnote a { color: inherit; text-underline-offset: 3px; }
.bnav { grid-column: 1 / -1; display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-top: 10px; padding-top: 28px; border-top: 1px solid var(--hairline); }
.bback { all: unset; cursor: pointer; font-family: var(--mono); font-size: 11px; letter-spacing: .18em; text-transform: uppercase; color: var(--acier); transition: color .3s; }
.bback:hover { color: var(--encre); }
.bback:focus-visible { outline: 2px solid var(--encre); outline-offset: 3px; }
.bback[hidden] { display: inline; visibility: hidden; }
.bstatus { flex: 1; text-align: right; }
.bstatus.is-err { color: var(--encre); }
.bstep.is-shake .bnav .btn { animation: bShake .45s cubic-bezier(.36,.07,.19,.97); }
@keyframes bShake { 20%, 60% { transform: translateX(-6px); } 40%, 80% { transform: translateX(6px); } }
.bf.is-bad { position: relative; }
.bf.is-bad::before { content: ""; position: absolute; left: -18px; top: 2px; width: 6px; height: 6px; background: var(--encre); clip-path: polygon(0 0, 100% 0, 100% 100%); }
@media (prefers-reduced-motion: reduce) { .bstep.is-shake .bnav .btn { animation: none; } }
.bnav .btn[disabled] { opacity: .55; cursor: progress; }
.btn__in i { font-style: normal; transition: transform .5s cubic-bezier(.2,.7,.2,1); }
.btn:hover .btn__in i { transform: translateX(6px); }
.brief__hp { position: absolute !important; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.bdone { display: flex; flex-direction: column; gap: 24px; outline: none; animation: bIn .6s cubic-bezier(.2,.7,.2,1); }
.bdone h2 { font-size: clamp(30px, 3.6vw, 52px); line-height: 1; letter-spacing: -.045em; font-weight: 500; }
.bdone p { font-size: 15.5px; line-height: 1.65; color: var(--ardoise); }
.bdone p.big { font-size: clamp(17px, 1.4vw, 20px); line-height: 1.45; color: var(--encre); letter-spacing: -.015em; }
.bdone__acts { display: flex; align-items: center; gap: 28px; flex-wrap: wrap; margin-top: 8px; }
@media (max-width: 900px) {
  .brief-page { grid-template-columns: minmax(0, 1fr); gap: 40px; padding-top: 48px; }
  .bside, .bmain { min-width: 0; }
  .bside { position: static; }
  .bsteps { flex-direction: row; gap: 18px; overflow-x: auto; }
  .bsteps li { white-space: nowrap; padding-block: 6px; }
  .bbar { margin-top: 8px; }
  .bstep { grid-template-columns: 1fr; gap: 30px; }
  .bstatus { text-align: left; flex-basis: 100%; order: 3; }
}