/* ============================================================
   Signal to Noise · Shared Static Stylesheet
   No JS dependencies. Pure CSS layout.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Questrial&family=Lora:ital@0;1&display=swap');

/* ── Reset & base ──────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:          #fbfaf7;
  --bg-alt:      #f4f1ea;
  --bg-card:     #ffffff;
  --ink:         #1a1814;
  --ink2:        #3a3530;
  --muted:       #7a7268;
  --muted2:      #b8b0a3;
  --border:      #ece8df;
  --accent:      #c2410c;
  --accent-soft: #fdf0e8;
  --accent-ink:  #7c2d12;
  --red-btn:     #d03a10;
  --green:       #059669;
  --sans: 'Questrial', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --serif: 'Lora', Georgia, serif;
  --radius: 16px;
  --radius-lg: 20px;
  --radius-pill: 999px;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  line-height: 1;
}

a { color: inherit; text-decoration: none; transition: opacity .2s; }
a:hover { opacity: .7; }
img { display: block; max-width: 100%; }
ul { list-style: none; }

*::-webkit-scrollbar { width: 8px; }
*::-webkit-scrollbar-thumb { background: rgba(0,0,0,.15); border-radius: 999px; }

/* ── Utility ───────────────────────────────────────────────── */
.gradient-text {
  background: linear-gradient(110deg, var(--accent), var(--accent-ink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.chip {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 11px; letter-spacing: 1.2px; text-transform: uppercase;
  color: var(--accent); padding: 6px 14px;
  background: var(--accent-soft); border-radius: var(--radius-pill);
}
.chip::before {
  content: ''; display: inline-block;
  width: 6px; height: 6px; border-radius: 50%; background: var(--accent);
  flex-shrink: 0;
}

.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--sans); font-size: 14px; padding: 13px 24px;
  border-radius: var(--radius-pill);
  background: var(--red-btn); color: var(--bg);
  box-shadow: 0 1px 4px rgba(0,0,0,.12);
  transition: opacity .2s;
}
.btn-outline {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--sans); font-size: 14px; padding: 13px 24px;
  border-radius: var(--radius-pill);
  background: transparent; color: var(--ink);
  border: 1px solid var(--border);
  transition: opacity .2s;
}
.btn-primary:hover, .btn-outline:hover { opacity: .82; }

.section-head { margin-bottom: 56px; }
.section-head .chip { margin-bottom: 20px; }
.section-head h2 {
  font-size: 52px; line-height: 1.05; letter-spacing: -1.5px;
  color: var(--ink); font-weight: 400;
}
.section-head p {
  font-size: 17px; line-height: 1.6; color: var(--muted);
  margin-top: 16px; max-width: 680px;
}
.section-head.center { text-align: center; }
.section-head.center p { margin-left: auto; margin-right: auto; }

/* ── Layout shells ─────────────────────────────────────────── */
.container { max-width: 1080px; margin: 0 auto; }
.section-bg    { background: var(--bg); }
.section-alt   { background: var(--bg-alt); }

/* ── Nav ───────────────────────────────────────────────────── */
#nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(251,250,247,.9); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  padding: 0 56px;
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}
.nav-logo img { height: 40px; width: auto; }
.nav-links {
  display: flex; align-items: center; gap: 32px;
}
.nav-links a:not(.btn-contact-primary) {
  font-size: 14px; color: var(--ink2);
}
.lang-toggle {
  display: flex; align-items: center; font-size: 11px;
  background: var(--bg-alt); border-radius: var(--radius-pill); padding: 3px;
  gap: 0;
}
.lang-toggle .active {
  padding: 5px 10px; background: var(--ink); color: var(--bg);
  border-radius: var(--radius-pill); font-size: 11px;
}
.lang-toggle .inactive {
  padding: 5px 10px; color: var(--muted); font-size: 11px;
}
.nav-cta { margin-left: 8px; }

/* ── Hero ──────────────────────────────────────────────────── */
#accueil { padding: 100px 56px 80px; }
#accueil .container {}
.hero-h1 {
  font-size: 88px; line-height: 1.0; letter-spacing: -3.5px;
  color: var(--ink); font-weight: 400; max-width: 900px; margin-bottom: 28px;
}
.hero-desc {
  font-size: 24px; line-height: 1.45; color: var(--ink2);
  max-width: 720px; margin-bottom: 12px;
}
.hero-sub {
  font-size: 16px; line-height: 1.6; color: var(--muted);
  max-width: 640px; margin-bottom: 40px;
}
.hero-btns { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 72px; }

.clients-row {
  padding-top: 32px; border-top: 1px solid var(--border);
  display: flex; align-items: center; flex-wrap: wrap; gap: 0;
}
.clients-label {
  font-size: 10px; letter-spacing: 1.2px; text-transform: uppercase;
  color: var(--muted2); margin-right: 28px; white-space: nowrap;
}
.clients-row span {
  font-size: 15px; color: var(--muted); padding: 8px 18px;
  border-right: 1px solid var(--border);
}
.clients-row span:first-of-type { border-left: 1px solid var(--border); }

/* ── Situations ────────────────────────────────────────────── */
#methode { padding: 100px 56px; }
.situations-list { display: flex; flex-direction: column; gap: 2px; }
.situation-card {
  background: var(--bg-card); border-radius: var(--radius-lg); padding: 36px 40px;
  border: 1px solid var(--border);
  display: grid; grid-template-columns: 80px 1fr; gap: 32px; align-items: start;
}
.situation-num {
  font-size: 42px; color: var(--accent); line-height: 1; letter-spacing: -2px; opacity: .35;
}
.situation-title {
  font-size: 24px; line-height: 1.2; color: var(--ink);
  font-weight: 400; letter-spacing: -.5px; margin-bottom: 16px;
}
.situation-desc { font-size: 16px; line-height: 1.65; color: var(--muted); }

/* ── Pourquoi ──────────────────────────────────────────────── */
#pourquoi { padding: 100px 56px; }
.cards-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.why-card {
  background: var(--bg-card); border-radius: var(--radius-lg); padding: 32px 28px;
  border: 1px solid var(--border); display: flex; flex-direction: column; gap: 16px;
}
.why-num {
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--accent-soft); color: var(--accent);
  display: flex; align-items: center; justify-content: center; font-size: 16px;
  flex-shrink: 0;
}
.why-title { font-size: 21px; line-height: 1.2; color: var(--ink); font-weight: 400; letter-spacing: -.4px; }
.why-desc { font-size: 14px; line-height: 1.65; color: var(--muted); }

/* ── Méthode ───────────────────────────────────────────────── */
#engagement { padding: 100px 56px; }
.engagements-list { display: flex; flex-direction: column; gap: 2px; margin-bottom: 72px; }
.engagement-card {
  background: var(--bg-card); border-radius: var(--radius-lg); padding: 32px 36px;
  border: 1px solid var(--border);
  display: grid; grid-template-columns: 48px 1fr; gap: 24px; align-items: start;
}
.engagement-num { font-size: 28px; color: var(--accent); line-height: 1; letter-spacing: -1px; opacity: .4; }
.engagement-title { font-size: 20px; line-height: 1.2; color: var(--ink); font-weight: 400; letter-spacing: -.3px; margin-bottom: 12px; }
.engagement-desc { font-size: 15px; line-height: 1.65; color: var(--muted); }

.modes-title { font-size: 28px; line-height: 1.1; color: var(--ink); font-weight: 400; letter-spacing: -.5px; margin-bottom: 28px; }
.modes-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 56px; }
.mode-card {
  background: var(--bg-card); border-radius: var(--radius-lg); padding: 28px 26px;
  border: 1px solid var(--border); display: flex; flex-direction: column; gap: 12px;
}
.mode-num { font-size: 11px; color: var(--accent); letter-spacing: 1px; text-transform: uppercase; }
.mode-title { font-size: 19px; line-height: 1.2; color: var(--ink); font-weight: 400; letter-spacing: -.3px; }
.mode-desc { font-size: 14px; line-height: 1.65; color: var(--muted); }

.oui-non-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.oui-card, .non-card {
  background: var(--bg-card); border-radius: var(--radius-lg); padding: 28px 32px;
  border: 1px solid var(--border);
}
.oui-label { font-size: 11px; letter-spacing: 1.2px; text-transform: uppercase; color: var(--green); margin-bottom: 16px; display: block; }
.non-label { font-size: 11px; letter-spacing: 1.2px; text-transform: uppercase; color: var(--muted); margin-bottom: 16px; display: block; }
.check-list { display: flex; flex-direction: column; gap: 10px; }
.check-list li { font-size: 14px; line-height: 1.55; color: var(--ink2); display: flex; gap: 10px; align-items: flex-start; }
.check-list li .icon { color: var(--green); font-size: 15px; flex-shrink: 0; margin-top: 1px; }
.cross-list { display: flex; flex-direction: column; gap: 10px; }
.cross-list li { font-size: 14px; line-height: 1.55; color: var(--muted); display: flex; gap: 10px; align-items: flex-start; }
.cross-list li .icon { color: var(--muted2); font-size: 15px; flex-shrink: 0; }

/* ── Projects ──────────────────────────────────────────────── */
#realisations { padding: 100px 56px; }
.projects-list { display: flex; flex-direction: column; gap: 40px; }
.project-card {
  background: var(--bg-card); border-radius: var(--radius-lg);
  border: 1px solid var(--border); overflow: hidden;
}
.project-header {
  padding: 32px 40px 28px; border-bottom: 1px solid var(--border);
  background: var(--bg-alt);
}
.project-header.tinted {
  background: linear-gradient(135deg, var(--accent-soft), var(--bg-alt));
}
.project-meta {
  display: flex; gap: 12px; align-items: center; margin-bottom: 14px; flex-wrap: wrap;
}
.project-sector { font-size: 11px; letter-spacing: 1.2px; text-transform: uppercase; color: var(--accent); }
.project-dot { font-size: 11px; color: var(--muted2); }
.project-type { font-size: 11px; color: var(--muted); }
.project-period { font-size: 11px; color: var(--muted); }
.project-title { font-size: 32px; line-height: 1.1; color: var(--ink); font-weight: 400; letter-spacing: -.8px; }

.project-body {
  padding: 32px 40px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px;
}
.project-col { display: flex; flex-direction: column; gap: 24px; }
.project-label {
  font-size: 11px; letter-spacing: 1.2px; text-transform: uppercase;
  color: var(--accent); margin-bottom: 10px; display: block;
}
.project-label-green { color: var(--green); }
.project-text { font-size: 15px; line-height: 1.65; color: var(--ink2); }
.action-list { display: flex; flex-direction: column; gap: 8px; }
.action-list li { font-size: 14px; line-height: 1.55; color: var(--ink2); display: flex; gap: 10px; align-items: flex-start; }
.action-list li .icon { color: var(--accent); flex-shrink: 0; margin-top: 2px; }
.results-block { border-top: 1px solid var(--border); padding-top: 20px; }
.result-list { display: flex; flex-direction: column; gap: 8px; }
.result-list li { font-size: 15px; line-height: 1.5; color: var(--ink); display: flex; gap: 10px; align-items: flex-start; }
.result-list li .icon { color: var(--green); flex-shrink: 0; margin-top: 2px; }
.project-source {
  padding: 14px 40px; border-top: 1px solid var(--border); background: var(--bg-alt);
  font-size: 11px; color: var(--muted); letter-spacing: .5px;
}
.project-source a { text-decoration: underline; opacity: .7; }

/* ── Expertise ─────────────────────────────────────────────── */
#expertise { padding: 100px 56px; }
.expertise-grid {
  display: grid; grid-template-columns: 1.2fr 1fr; gap: 20px;
  align-items: stretch; margin-bottom: 20px;
}
.featured-tile {
  position: relative; overflow: hidden;
  background: linear-gradient(135deg, #fff 0%, var(--accent-soft) 100%);
  border-radius: var(--radius-lg); border: 1px solid var(--border);
  padding: 44px 40px; display: flex; flex-direction: column; min-height: 360px;
}
/* Wave SVG background */
.featured-tile::before {
  content: '';
  position: absolute; inset: 0;
  background-image: url("./assets/desk.jpg");
  background-size: cover;
  opacity: .15; pointer-events: none;
}
.featured-content { position: relative; z-index: 1; display: flex; flex-direction: column; flex: 1; }
.featured-badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 11px; letter-spacing: 1.2px; text-transform: uppercase;
  color: var(--accent); padding: 6px 14px;
  background: #fff; border-radius: var(--radius-pill); border: 1px solid var(--border);
  align-self: flex-start; margin-bottom: 24px;
}
.featured-badge::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent); flex-shrink: 0;
}
.featured-title {
  font-size: 38px; line-height: 1.05; letter-spacing: -1.2px;
  color: var(--ink); font-weight: 400; margin-bottom: 16px; max-width: 440px;
  text-decoration: underline wavy var(--accent) 2px;
  text-underline-offset: 6px;
}
.featured-desc { font-size: 16px; line-height: 1.55; color: var(--ink2); max-width: 440px; margin-bottom: 28px; }
.featured-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.featured-tags span {
  font-size: 11px; padding: 6px 12px;
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius-pill); color: var(--ink2);
}

.expertise-list {
  background: var(--bg-card); border-radius: var(--radius-lg); border: 1px solid var(--border);
  display: flex; flex-direction: column;
}
.expertise-item {
  padding: 20px 26px; display: flex; gap: 20px; align-items: flex-start; flex: 1;
}
.expertise-item:not(:last-child) { border-bottom: 1px solid var(--border); }
.expertise-num { font-size: 11px; color: var(--accent); min-width: 30px; padding-top: 3px; flex-shrink: 0; }
.expertise-name {
  font-size: 16px; color: var(--ink); letter-spacing: -.2px; margin-bottom: 4px;
  text-decoration: underline wavy 1.5px;
  text-underline-offset: 5px;
  display: inline;
}
.expertise-name-en  { color: #0369a1; text-decoration-color: #0369a1; }
.expertise-name-elec { color: #6d28d9; text-decoration-color: #6d28d9; }
.expertise-name-ai  { color: #0f766e; text-decoration-color: #0f766e; }
.expertise-name-sec { color: #b45309; text-decoration-color: #b45309; }
.expertise-name-sup { color: #1d4ed8; text-decoration-color: #1d4ed8; }
.expertise-name-0to1 { color: #059669; text-decoration-color: #059669; }

.expertise-desc { font-size: 13.5px; color: var(--muted); line-height: 1.5; margin-top: 4px; }

.certs-card {
  background: var(--bg-card); border-radius: var(--radius); padding: 28px 32px;
  border: 1px solid var(--border);
}
.certs-label { font-size: 11px; letter-spacing: 1.2px; text-transform: uppercase; color: var(--accent); margin-bottom: 16px; display: block; }
.certs-list { display: flex; flex-wrap: wrap; gap: 8px; }
.certs-list span { font-size: 11px; padding: 6px 14px; background: var(--bg-alt); color: var(--ink2); border-radius: var(--radius-pill); }

/* ── Contact ───────────────────────────────────────────────── */
#contact { padding: 100px 56px; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.contact-dark {
  background: linear-gradient(135deg, var(--ink) 0%, #2d2620 100%);
  border-radius: 24px; padding: 56px 48px; position: relative; overflow: hidden;
}
.contact-dark .chip { background: rgba(194,65,12,.2); }
.contact-dark h2 {
  font-size: 48px; line-height: 1.05; letter-spacing: -1.8px;
  color: var(--bg); margin: 20px 0; font-weight: 400;
}
.contact-dark p { font-size: 16px; line-height: 1.6; color: #d6cfc4; margin-bottom: 32px; }
.contact-logo-bg {
  position: absolute; right: -20px; bottom: 20px; opacity: .07; width: 360px; pointer-events: none;
}
.btn-contact-primary {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--sans); font-size: 14px; padding: 14px 28px; border-radius: var(--radius-pill);
  background: var(--accent); color: var(--bg);
}
.contact-right { display: flex; flex-direction: column; gap: 20px; }
.fit-card {
  background: var(--bg-card); border-radius: var(--radius); padding: 28px 32px;
  border: 1px solid var(--border);
}
.fit-label-yes { font-size: 11px; letter-spacing: 1.2px; text-transform: uppercase; color: var(--green); margin-bottom: 16px; display: block; }
.fit-label-no  { font-size: 11px; letter-spacing: 1.2px; text-transform: uppercase; color: var(--muted); margin-bottom: 12px; display: block; }
.fit-text { font-size: 14px; line-height: 1.6; color: var(--muted); }
.btn-linkedin {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--sans); font-size: 14px; padding: 13px 24px; border-radius: var(--radius-pill);
  border: 1px solid var(--border); color: var(--ink); align-self: flex-start;
}

/* ── Footer ────────────────────────────────────────────────── */
footer {
  padding: 40px 56px 56px; background: var(--bg-alt);
  border-top: 1px solid var(--border);
  display: grid; grid-template-columns: 1fr auto 1fr; gap: 24px; align-items: center;
  font-size: 12px; color: var(--muted);
}
.footer-name { font-size: 13px; color: var(--ink2); margin-bottom: 4px; }
footer .logo-footer img { height: 28px; width: auto; }
.footer-right { text-align: right; }
.footer-right a { color: var(--ink2); }

/* ── Responsive (basic) ────────────────────────────────────── */
@media (max-width: 900px) {
  #nav { padding: 0 24px; }
  .nav-links a:not(:last-child):not(.btn-primary) { display: none; }
  #accueil, #methode, #pourquoi, #engagement, #realisations, #expertise, #contact { padding: 64px 24px; }
  .hero-h1 { font-size: 52px; letter-spacing: -2px; }
  .hero-desc { font-size: 18px; }
  .section-head h2 { font-size: 36px; }
  .cards-3, .modes-grid, .oui-non-grid { grid-template-columns: 1fr; }
  .expertise-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .project-body { grid-template-columns: 1fr; }
  footer { grid-template-columns: 1fr; gap: 16px; }
  .footer-right { text-align: left; }
}