/* ============================================================
   AiterEgo — ALT2 (Swiss editorial, sage/bone, Big Shoulders)
   inspired by the Variant "archive / editorial" template
   ============================================================ */

:root {
  --sage: #D9DEC0;
  --bone: #F1F1E6;
  --ink: #312F2C;
  --accent: #A8B88F;
  --rule: 1px solid #312F2C;
  --display: 'Big Shoulders Display', sans-serif;
  --body: 'Inter', sans-serif;
  --mono: 'JetBrains Mono', monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  background-color: var(--sage);
  color: var(--ink);
  font-family: var(--body);
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
::selection { background: var(--ink); color: var(--sage); }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }

.mono { font-family: var(--mono); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; }
.display { font-family: var(--display); font-weight: 900; text-transform: uppercase; }

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--sage); }
::-webkit-scrollbar-thumb { background: var(--ink); }

/* ---------- nav ---------- */
nav {
  position: fixed; top: 0; left: 0; width: 100%;
  padding: 1.6rem clamp(1.25rem, 4vw, 4rem);
  z-index: 100; display: flex; justify-content: space-between; align-items: center;
  mix-blend-mode: multiply; gap: 1rem;
}
.nav-brand { font-family: var(--mono); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em; }
.nav-right { display: flex; align-items: center; gap: 1.25rem; }
.nav-links { display: flex; gap: 1.1rem; }
.nav-links a { font-family: var(--mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.05em; text-decoration: none; }
.nav-links a:hover { text-decoration: underline; }
.lang { display: flex; align-items: center; gap: 5px; font-family: var(--mono); font-size: 0.72rem; }
.lang button { font-family: var(--mono); font-size: 0.72rem; background: none; border: none; text-transform: uppercase; padding: 1px 4px; cursor: pointer; }
.lang button.active { background: var(--ink); color: var(--sage); }
.lang button:not(.active):hover { text-decoration: underline; }
.nav-book { font-family: var(--mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.05em; text-decoration: none; border: var(--rule); padding: 6px 11px; }
.nav-book:hover { background: var(--ink); color: var(--sage); }

/* ---------- hero ---------- */
.hero { min-height: 100vh; display: grid; grid-template-columns: 1fr 1fr; border-bottom: var(--rule); }
.hero-left { padding: 8rem clamp(1.25rem, 4vw, 4rem) 4rem; display: flex; flex-direction: column; justify-content: space-between; gap: 3rem; }
.hero-right {
  border-left: var(--rule);
  background-image: url('https://images.unsplash.com/photo-1589829545856-d10d557cf95f?q=80&w=2070&auto=format&fit=crop');
  background-size: cover; background-position: center;
  filter: grayscale(100%) contrast(110%);
}
.brand-title { font-family: var(--display); font-weight: 900; font-size: clamp(5rem, 17vw, 16rem); line-height: 0.78; letter-spacing: -0.02em; text-transform: uppercase; margin-left: -0.4rem; }
.hero-sub { max-width: 440px; font-weight: 600; font-size: clamp(1.05rem, 1.5vw, 1.3rem); }

/* ---------- stats bar ---------- */
.stats-bar { background: var(--bone); display: grid; grid-template-columns: repeat(4, 1fr); border-bottom: var(--rule); }
.stat-item { padding: 2.6rem clamp(1.25rem, 2.5vw, 3rem); border-right: var(--rule); }
.stat-item:last-child { border-right: none; }
.stat-value { font-family: var(--display); font-weight: 900; font-size: clamp(2.6rem, 4vw, 4rem); line-height: 1; margin: 0.4rem 0; }
.stat-label { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; line-height: 1.5; }

/* ---------- generic content section ---------- */
.content-section { padding: clamp(4rem, 8vw, 8rem) clamp(1.25rem, 4vw, 4rem); }
.content-section.bone { background: var(--bone); border-bottom: var(--rule); }
.content-section.sage { border-bottom: var(--rule); }
.section-header { font-family: var(--display); font-weight: 900; font-size: clamp(3rem, 7vw, 6rem); text-transform: uppercase; line-height: 0.9; margin-bottom: 1rem; }
.section-intro { max-width: 620px; font-size: 1.05rem; margin-bottom: 3.5rem; opacity: 0.85; }
.eyebrow { margin-bottom: 1.2rem; }

/* ---------- rows (problème, méthode) ---------- */
.row {
  display: grid; grid-template-columns: 1fr 220px; gap: 3rem;
  padding: 2.4rem 0; border-top: var(--rule); align-items: start;
}
.row:last-child { border-bottom: var(--rule); }
.row .row-h3 { font-size: 1.5rem; font-weight: 600; text-transform: uppercase; margin: 0.6rem 0 0.8rem; }
.row p { max-width: 560px; font-size: 0.98rem; opacity: 0.82; }
.row .row-aside { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; text-align: right; }
.row .row-tag { display: inline-block; border: var(--rule); padding: 5px 10px; }

/* ---------- workflow rows (offres, with images) ---------- */
.workflow-row {
  display: grid; grid-template-columns: 1fr 220px; gap: clamp(2rem, 4vw, 4rem);
  padding: 3rem 0; border-top: var(--rule); align-items: center; transition: background 0.3s ease;
}
.workflow-row:last-child { border-bottom: var(--rule); }
.workflow-row:hover { background: rgba(49, 47, 44, 0.04); }
.workflow-info h3 { font-size: clamp(1.6rem, 2.4vw, 2rem); font-weight: 600; margin: 0.8rem 0 1rem; text-transform: uppercase; }
.workflow-info p { max-width: 480px; margin-bottom: 1.6rem; font-size: 1rem; opacity: 0.82; }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-row .tag { font-family: var(--mono); font-size: 0.65rem; text-transform: uppercase; border: var(--rule); padding: 4px 8px; }
.workflow-img { width: 100%; aspect-ratio: 1; background-color: var(--ink); filter: grayscale(100%); object-fit: cover; transition: filter 0.4s ease; border: var(--rule); }
.workflow-row:hover .workflow-img { filter: grayscale(0); }

/* ---------- cas d'usage grid ---------- */
.uc-grid { display: grid; grid-template-columns: repeat(2, 1fr); }
.uc-cell { padding: 2.4rem; border-top: var(--rule); border-right: var(--rule); }
.uc-cell:nth-child(2n) { border-right: none; }
.uc-cell .uc-dom { font-family: var(--mono); font-size: 0.7rem; text-transform: uppercase; }
.uc-cell h3 { font-size: 1.5rem; font-weight: 600; text-transform: uppercase; margin: 0.8rem 0; }
.uc-cell p { font-size: 0.95rem; opacity: 0.82; }
.uc-cell .uc-metric { display: flex; align-items: baseline; gap: 0.8rem; margin-top: 1.4rem; }
.uc-cell .uc-metric b { font-family: var(--display); font-weight: 900; font-size: 2.6rem; line-height: 0.8; }
.uc-cell .uc-metric span { font-family: var(--mono); font-size: 0.68rem; text-transform: uppercase; }

/* ---------- témoignages ---------- */
.quotes { display: grid; grid-template-columns: 1fr 1fr; gap: 0; }
.quote { padding: 2.6rem; border-top: var(--rule); border-right: var(--rule); display: flex; flex-direction: column; gap: 1.6rem; }
.quote:last-child { border-right: none; }
.quote blockquote { font-family: var(--display); font-weight: 800; font-size: clamp(1.3rem, 2vw, 1.7rem); line-height: 1.1; text-transform: uppercase; }
.quote figcaption { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; margin-top: auto; line-height: 1.6; }
.quote figcaption b { display: block; }
.quote figcaption a { text-decoration: underline; }

/* ---------- fondateur ---------- */
.founder { display: grid; grid-template-columns: 320px 1fr; gap: clamp(2rem, 4vw, 4rem); align-items: start; }
.founder-photo { border: var(--rule); aspect-ratio: 4/5; overflow: hidden; background: var(--ink); }
.founder-photo img { width: 100%; height: 100%; object-fit: cover; object-position: center 22%; display: block; filter: grayscale(100%) contrast(108%); transition: filter 0.4s ease; }
.founder:hover .founder-photo img { filter: grayscale(0); }
.founder h3 { font-family: var(--display); font-weight: 900; font-size: clamp(2.4rem, 4vw, 3.4rem); text-transform: uppercase; line-height: 0.9; }
.founder-role { display: inline-block; font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; border: var(--rule); padding: 4px 10px; margin: 1rem 0 1.4rem; }
.founder-body p { max-width: 60ch; font-size: 1rem; }
.founder-links { display: flex; gap: 1.4rem; margin-top: 1.6rem; }
.founder-links a { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; text-decoration: none; border-bottom: var(--rule); }
.founder-links a:hover { background: var(--ink); color: var(--sage); }

/* ---------- faq ---------- */
.faq-item { border-top: var(--rule); }
.faq-item:last-child { border-bottom: var(--rule); }
.faq-q { width: 100%; display: grid; grid-template-columns: 1fr auto; gap: 1.5rem; align-items: center; text-align: left; background: none; border: none; padding: 1.6rem 0; cursor: pointer; font-family: var(--display); font-weight: 800; font-size: clamp(1.4rem, 2.4vw, 2rem); text-transform: uppercase; line-height: 1; }
.faq-q:hover { opacity: 0.65; }
.faq-ic { font-family: var(--mono); font-size: 1.4rem; transition: transform 0.25s ease; }
.faq-item.open .faq-ic { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
.faq-a p { font-size: 1rem; line-height: 1.6; max-width: 72ch; padding-bottom: 1.6rem; opacity: 0.85; }

/* ---------- form ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 4vw, 4rem); }
.contact-channels { display: flex; flex-direction: column; }
.channel { display: grid; grid-template-columns: 90px 1fr; gap: 1rem; padding: 1rem 0; border-top: var(--rule); font-family: var(--mono); font-size: 0.8rem; text-transform: uppercase; align-items: baseline; }
.channel:last-child { border-bottom: var(--rule); }
.channel .cl { opacity: 0.6; }
.channel a { text-decoration: none; }
.channel a:hover { text-decoration: underline; }
.contact-form { display: flex; flex-direction: column; gap: 1.2rem; }
.field { display: flex; flex-direction: column; gap: 0.4rem; }
.field label { font-family: var(--mono); font-size: 0.68rem; text-transform: uppercase; }
.field input, .field select { font-family: var(--mono); font-size: 0.85rem; background: transparent; border: none; border-bottom: var(--rule); padding: 0.5rem 0.1rem; border-radius: 0; appearance: none; -webkit-appearance: none; color: var(--ink); }
.field input:focus, .field select:focus { outline: none; border-bottom-width: 2px; }
.btn-submit { align-self: flex-start; font-family: var(--display); font-weight: 900; font-size: 1.6rem; text-transform: uppercase; border: var(--rule); background: none; padding: 0.8rem 2rem; cursor: pointer; transition: all 0.2s; }
.btn-submit:hover { background: var(--ink); color: var(--sage); }
.btn-submit.sent { background: var(--accent); border-color: var(--accent); }

/* ---------- footer ---------- */
footer { background: var(--ink); color: var(--sage); padding: clamp(4rem, 8vw, 8rem) clamp(1.25rem, 4vw, 4rem); display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; }
.footer-left { display: flex; flex-direction: column; gap: 1.4rem; }
.footer-logo { font-family: var(--display); font-weight: 900; font-size: clamp(5rem, 12vw, 10rem); line-height: 0.78; }
.footer-cta { display: flex; flex-direction: column; justify-content: flex-end; align-items: flex-end; text-align: right; gap: 1.8rem; }
.footer-cta p { max-width: 320px; }
.btn-large { border: 1px solid var(--sage); padding: 1.5rem 2.6rem; font-family: var(--display); font-weight: 900; font-size: clamp(1.8rem, 3vw, 3rem); text-transform: uppercase; text-decoration: none; color: var(--sage); transition: all 0.35s; }
.btn-large:hover { background: var(--sage); color: var(--ink); }
.footer-meta { grid-column: 1 / -1; display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; font-family: var(--mono); font-size: 0.66rem; text-transform: uppercase; opacity: 0.7; padding-top: 2.5rem; margin-top: 1rem; border-top: 1px solid rgba(217,222,192,0.3); }

/* ---------- responsive ---------- */
@media (max-width: 1024px) {
  nav { background: var(--sage); }
  .hero { grid-template-columns: 1fr; }
  .hero-right { min-height: 50vh; border-left: none; border-top: var(--rule); }
  .hero-left { padding-top: 7rem; }
  .stats-bar { grid-template-columns: 1fr 1fr; }
  .stat-item:nth-child(2n) { border-right: none; }
  .stat-item { border-bottom: var(--rule); }
  .row, .workflow-row { grid-template-columns: 1fr; gap: 1.5rem; }
  .row .row-aside { text-align: left; }
  .workflow-img { max-width: 300px; }
  .uc-grid { grid-template-columns: 1fr; }
  .uc-cell { border-right: none; }
  .quotes { grid-template-columns: 1fr; }
  .quote { border-right: none; }
  .founder { grid-template-columns: 1fr; }
  .founder-photo { max-width: 300px; }
  .contact-grid { grid-template-columns: 1fr; }
  footer { grid-template-columns: 1fr; }
  .footer-cta { align-items: flex-start; text-align: left; }
}
@media (max-width: 560px) {
  .nav-links { display: none; }
  .stats-bar { grid-template-columns: 1fr; }
  .stat-item { border-right: none; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }