:root {
  --ink: #111214;
  --paper: #f4f2ed;
  --white: #ffffff;
  --muted: #66686d;
  --line: rgba(17, 18, 20, 0.14);
  --red: #c5232d;
  --red-dark: #991820;
  --max: 1220px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
img { display: block; max-width: 100%; }
button, input, textarea, select { font: inherit; }

.skip-link {
  position: fixed;
  top: -100px;
  left: 1rem;
  z-index: 999;
  padding: .7rem 1rem;
  background: var(--white);
}
.skip-link:focus { top: 1rem; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(255, 255, 255, .94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}
.header-inner {
  max-width: var(--max);
  min-height: 86px;
  margin: auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}
.brand img { width: min(330px, 36vw); }
.nav { display: flex; align-items: center; gap: 26px; }
.nav a {
  text-decoration: none;
  font-size: .76rem;
  font-weight: 750;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.nav a:hover, .nav a:focus-visible { color: var(--red); }
.lang {
  border-left: 1px solid var(--line);
  padding-left: 20px;
}
.menu-toggle {
  display: none;
  border: 0;
  background: transparent;
  font-size: 1.8rem;
  line-height: 1;
}

.hero {
  min-height: calc(100vh - 86px);
  position: relative;
  display: grid;
  align-items: end;
  overflow: hidden;
  color: var(--white);
  background: #111;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  filter: grayscale(100%);
  background: linear-gradient(90deg, rgba(10,10,11,.86) 0%, rgba(10,10,11,.52) 48%, rgba(10,10,11,.08) 75%),
              linear-gradient(0deg, rgba(10,10,11,.58) 0%, transparent 55%),
              url("assets/gss-hero-paris-v3.png") center/cover no-repeat;
  transform: scale(1.01);
}
.hero-content {
  position: relative;
  z-index: 1;
  width: min(var(--max), calc(100% - 56px));
  margin: 0 auto;
  padding: 12vh 0 10vh;
}
.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 22px;
  color: var(--red);
  font-size: .77rem;
  font-weight: 800;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.eyebrow::before { content: ""; width: 38px; height: 2px; background: currentColor; }
.hero h1, .section-title {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 400;
  letter-spacing: -.035em;
  line-height: 1.02;
}
.hero h1 { max-width: 890px; font-size: clamp(3.1rem, 7.2vw, 7rem); }
.hero-lead { max-width: 670px; margin: 28px 0 0; color: rgba(255,255,255,.84); font-size: clamp(1rem, 1.8vw, 1.28rem); }
.actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 0 25px;
  border: 1px solid var(--red);
  background: var(--red);
  color: var(--white);
  text-decoration: none;
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
  transition: .2s ease;
}
.button:hover, .button:focus-visible { background: var(--red-dark); border-color: var(--red-dark); transform: translateY(-2px); }
.button.secondary { border-color: rgba(255,255,255,.55); background: transparent; }
.button.secondary:hover { border-color: var(--white); background: rgba(255,255,255,.1); }

.trust-strip { background: var(--white); border-bottom: 1px solid var(--line); }
.trust-grid {
  max-width: var(--max);
  margin: auto;
  padding: 0 28px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}
.trust-item { padding: 26px 30px; border-right: 1px solid var(--line); }
.trust-item:first-child { padding-left: 0; }
.trust-item:last-child { border-right: 0; }
.trust-item strong { display: block; font-family: Georgia, serif; font-size: 1.12rem; font-weight: 500; }
.trust-item span { color: var(--muted); font-size: .84rem; }

.section { padding: 110px 28px; }
.container { max-width: var(--max); margin: auto; }
.section-head { max-width: 830px; margin-bottom: 58px; }
.section-title { font-size: clamp(2.45rem, 5vw, 4.8rem); }
.section-intro { max-width: 740px; margin: 24px 0 0; color: var(--muted); font-size: 1.08rem; }
.split { display: grid; grid-template-columns: 1.05fr .95fr; gap: 70px; align-items: center; }
.split-image { min-height: 560px; object-fit: cover; width: 100%; filter: grayscale(100%); }
.prose h2 { margin: 0 0 24px; font-family: Georgia, serif; font-size: clamp(2.25rem, 4vw, 4rem); font-weight: 400; line-height: 1.08; }
.prose p { color: var(--muted); }
.prose .lead { color: var(--muted); font-size: inherit; }
.prose p, .service p, .detail-copy p, .visual-copy p, .legal-content p {
  text-align: justify;
  text-justify: inter-word;
  text-align-last: left;
  hyphens: none;
}
.section-intro, .step p, .contact-copy p {
  text-align: left;
  hyphens: none;
}
.hero-lead,
.service-details .section-intro,
#methode .section-intro,
.contact-copy p {
  text-align: justify;
  text-justify: inter-word;
  text-align-last: left;
  text-wrap: pretty;
  hyphens: none;
}
.no-break { white-space: nowrap; }
.signature { margin-top: 28px; padding-top: 22px; border-top: 1px solid var(--line); font-size: .88rem; font-weight: 750; letter-spacing: .08em; text-transform: uppercase; }

.dark { background: var(--ink); color: var(--white); }
.dark .section-intro, .dark p { color: rgba(255,255,255,.68); }
.services { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid rgba(255,255,255,.18); }
.service {
  min-height: 510px;
  border-right: 1px solid rgba(255,255,255,.18);
  border-bottom: 1px solid rgba(255,255,255,.18);
  overflow: hidden;
}
.service:nth-child(even) { border-right: 0; }
.service-link { display: flex; height: 100%; flex-direction: column; color: inherit; text-decoration: none; }
.service-image { position: relative; overflow: hidden; width: 100%; aspect-ratio: 16 / 9; height: auto; background: #222; }
.service-image::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(10,10,11,.45), transparent 60%); }
.service-image img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(100%); transition: transform .5s ease, filter .5s ease; }
.service-link:hover .service-image img, .service-link:focus-visible .service-image img { transform: scale(1.035); filter: grayscale(72%); }
.service-body { flex: 1; padding: 34px 42px 39px; display: flex; flex-direction: column; }
.service-number { color: var(--red); font-size: .78rem; font-weight: 800; letter-spacing: .15em; }
.service h3 { margin: 22px 0 12px; font-family: Georgia, serif; font-size: clamp(1.8rem, 3vw, 2.8rem); font-weight: 400; line-height: 1.08; }
.service p { max-width: 510px; margin: 0; }
.service-more { margin-top: auto; padding-top: 25px; color: var(--white); font-size: .74rem; font-weight: 800; letter-spacing: .11em; text-transform: uppercase; }
.service-more::after { content: " →"; color: var(--red); }

.service-details { background: var(--paper); }
.service-detail { display: grid; grid-template-columns: 1fr 1fr; min-height: 620px; border-top: 1px solid var(--line); }
.service-detail:last-child { border-bottom: 1px solid var(--line); }
.service-detail:nth-child(even) .detail-image { order: 2; }
.detail-image { width: 100%; height: 100%; min-height: 620px; object-fit: cover; filter: grayscale(100%); }
.detail-copy { padding: clamp(50px, 7vw, 100px); display: flex; flex-direction: column; justify-content: center; }
.detail-copy h3 { margin: 0 0 22px; font-family: Georgia, serif; font-size: clamp(2.25rem, 4vw, 4.2rem); font-weight: 400; line-height: 1.04; }
.detail-copy p { color: var(--muted); }
.detail-list { margin: 22px 0 28px; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.detail-list li { padding: 11px 0; border-bottom: 1px solid var(--line); font-size: .9rem; font-weight: 700; }
.detail-copy .button { align-self: flex-start; }

.visual-band { display: grid; grid-template-columns: 1.05fr .95fr; background: var(--white); }
.visual-band img { width: 100%; height: 100%; min-height: 660px; object-fit: cover; filter: grayscale(100%); }
.visual-copy { padding: clamp(55px, 8vw, 120px); display: flex; flex-direction: column; justify-content: center; }
.visual-copy h2 { margin: 0 0 28px; font-family: Georgia, serif; font-size: clamp(2.4rem, 4.5vw, 4.8rem); font-weight: 400; line-height: 1.04; }
.visual-copy p { color: var(--muted); }

.process { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.process-layout { display: grid; grid-template-columns: .85fr 1.15fr; gap: 34px; align-items: stretch; }
.process-layout .process { grid-template-columns: repeat(2, 1fr); }
.process-photo { width: 100%; height: 100%; min-height: 561px; object-fit: cover; filter: grayscale(100%); }
.step { min-height: 280px; padding: 34px; background: var(--paper); }
.step span { color: var(--red); font-size: .75rem; font-weight: 800; letter-spacing: .12em; }
.step h3 { margin: 65px 0 12px; font-family: Georgia, serif; font-size: 1.55rem; font-weight: 400; }
.step p { color: var(--muted); font-size: .93rem; }

.locations { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 38px; }
.location { padding: 10px 15px; border: 1px solid var(--line); background: var(--white); font-size: .82rem; font-weight: 750; letter-spacing: .06em; text-transform: uppercase; }

.contact { background: #e9e6df; }
.contact-grid { display: grid; grid-template-columns: .75fr 1.25fr; gap: 90px; }
.contact-copy h2 { margin: 0; font-family: Georgia, serif; font-size: clamp(2.6rem, 5vw, 5.1rem); font-weight: 400; line-height: 1.03; }
.contact-copy p { color: var(--muted); }
.contact-mail { display: inline-block; margin-top: 22px; color: var(--red-dark); font-weight: 750; text-underline-offset: 4px; }
.form { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: .75rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.field input, .field select, .field textarea {
  width: 100%;
  border: 0;
  border-bottom: 1px solid #9b9a96;
  border-radius: 0;
  padding: 13px 2px;
  background: transparent;
  color: var(--ink);
}
.field input:focus, .field select:focus, .field textarea:focus { outline: 0; border-color: var(--red); }
.field textarea { min-height: 125px; resize: vertical; }
.form-note { grid-column: 1 / -1; color: var(--muted); font-size: .78rem; }
.form-status { grid-column: 1 / -1; display: none; margin: 0; padding: 12px 15px; border-left: 3px solid var(--red); background: rgba(255,255,255,.58); }
.form-status.visible { display: block; }
.honeypot { position: absolute !important; left: -10000px !important; width: 1px !important; height: 1px !important; overflow: hidden !important; }
.form .button { width: max-content; cursor: pointer; }

.site-footer { background: #090a0b; color: rgba(255,255,255,.72); }
.footer-main {
  max-width: var(--max);
  margin: auto;
  padding: 68px 28px 38px;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 60px;
}
.footer-brand { font-family: Georgia, serif; color: var(--white); font-size: 1.75rem; }
.footer-col strong { display: block; margin-bottom: 15px; color: var(--white); font-size: .76rem; letter-spacing: .11em; text-transform: uppercase; }
.footer-col a { display: block; margin: 7px 0; text-decoration: none; font-size: .89rem; }
.footer-col a:hover { color: var(--white); }
.legal-line { max-width: var(--max); margin: auto; padding: 22px 28px 34px; border-top: 1px solid rgba(255,255,255,.12); font-size: .72rem; line-height: 1.55; }

.legal-page { min-height: 70vh; padding: 85px 28px 120px; background: var(--white); }
.legal-content { max-width: 900px; margin: auto; }
.legal-content h1 { font-family: Georgia, serif; font-size: clamp(2.6rem, 6vw, 5rem); font-weight: 400; }
.legal-content h2 { margin-top: 42px; font-family: Georgia, serif; font-size: 1.7rem; font-weight: 500; }
.legal-content p, .legal-content li { color: #4f5155; }
.placeholder { color: var(--red-dark); font-weight: 750; }

@media (max-width: 940px) {
  .menu-toggle { display: block; }
  .nav {
    position: absolute;
    top: 86px;
    left: 0;
    right: 0;
    display: none;
    padding: 28px;
    background: var(--white);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: flex-start;
  }
  .nav.open { display: flex; }
  .lang { border-left: 0; padding-left: 0; }
  .brand img { width: min(300px, 62vw); }
  .hero { min-height: 760px; }
  .hero::before { background: linear-gradient(90deg, rgba(10,10,11,.82), rgba(10,10,11,.32)), linear-gradient(0deg, rgba(10,10,11,.62), transparent), url("assets/gss-hero-paris-v3.png") 63% center/cover no-repeat; }
  .trust-grid { grid-template-columns: 1fr; }
  .trust-item { border-right: 0; border-bottom: 1px solid var(--line); padding-left: 0; }
  .split, .visual-band, .contact-grid { grid-template-columns: 1fr; gap: 45px; }
  .service-detail, .process-layout { grid-template-columns: 1fr; }
  .service-detail:nth-child(even) .detail-image { order: 0; }
  .detail-image { min-height: 500px; }
  .process-photo { min-height: 480px; }
  .visual-band img { min-height: 520px; }
  .visual-copy { padding: 70px 28px; }
  .process { grid-template-columns: repeat(2, 1fr); }
  .footer-main { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 620px) {
  body { font-size: 16px; }
  .header-inner { min-height: 76px; padding: 0 18px; }
  .nav { top: 76px; }
  .hero { min-height: calc(100svh - 76px); }
  .hero-content { width: calc(100% - 36px); padding: 90px 0 54px; }
  .hero h1 { font-size: clamp(2.75rem, 14vw, 4.3rem); }
  .hero-lead { font-size: 1rem; }
  .actions { flex-direction: column; align-items: stretch; }
  .button { width: 100%; }
  .section { padding: 78px 18px; }
  .section-head { margin-bottom: 38px; }
  .services { grid-template-columns: 1fr; }
  .service { min-height: 300px; padding: 32px 24px; border-right: 0; }
  .service { padding: 0; }
  .service-image { height: auto; }
  .service-body { padding: 28px 24px 32px; }
  .service-detail { min-height: auto; }
  .detail-image { min-height: 380px; }
  .detail-copy { padding: 52px 18px 68px; }
  .split-image { min-height: 430px; }
  .visual-band img { min-height: 420px; }
  .process, .process-layout .process { grid-template-columns: 1fr; }
  .process-photo { min-height: 360px; }
  .step { min-height: 230px; }
  .step h3 { margin-top: 42px; }
  .contact-grid { gap: 52px; }
  .form { grid-template-columns: 1fr; }
  .field.full { grid-column: auto; }
  .form-note { grid-column: auto; }
  .footer-main { grid-template-columns: 1fr; gap: 34px; padding-left: 18px; padding-right: 18px; }
  .legal-line { padding-left: 18px; padding-right: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}