/* ============================================================
   INFINIA — Feuille de styles principale
   Charte : Ink/Paper monochrome · Archivo + DM Mono
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Archivo:wght@300;400;500;600&family=DM+Mono:wght@400;500&display=swap');

/* === Variables === */
:root {
  --ink:        #0D1117;
  --paper:      #F4F0E6;
  --graphite:   #3A3F47;
  --stone:      #D4CFC1;
  --dust:       #9C968A;
  --paper-dim:  #EAE5D6;

  --font-display: 'Archivo', 'Helvetica Neue', Arial, sans-serif;
  --font-mono:    'DM Mono', 'Courier New', monospace;

  --max-width: 1280px;
  --gutter: clamp(1.5rem, 4vw, 4rem);
  --section-padding: clamp(4rem, 10vw, 9rem);
}

/* === Reset === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-display);
  font-weight: 400;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

/* === Typographie === */
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 400; letter-spacing: -0.01em; line-height: 1.15; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dust);
  display: inline-block;
}

.eyebrow::before {
  content: "—— ";
  letter-spacing: 0;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3.75rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-top: 1.5rem;
  margin-bottom: 2rem;
  max-width: 22ch;
}

.section-title.center { margin-left: auto; margin-right: auto; }

.lead {
  font-size: clamp(1.05rem, 1.5vw, 1.25rem);
  color: var(--graphite);
  line-height: 1.6;
  max-width: 62ch;
  font-weight: 300;
}

p { color: var(--graphite); font-weight: 300; max-width: 65ch; }

/* === Layout === */
.container { max-width: var(--max-width); margin: 0 auto; padding-left: var(--gutter); padding-right: var(--gutter); }
section { padding-top: var(--section-padding); padding-bottom: var(--section-padding); }
.section-rule { border-top: 1px solid var(--stone); }

/* === Header === */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(244, 240, 230, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}
.site-header.scrolled { border-bottom-color: var(--stone); }
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.25rem;
  padding-bottom: 1.25rem;
}
.brand {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.125rem;
  letter-spacing: 0.18em;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.brand-mark {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

/* === Navigation === */
.site-nav ul { display: flex; gap: clamp(1.25rem, 3vw, 2.75rem); align-items: center; }
.site-nav a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--graphite);
  position: relative;
  padding: 0.5rem 0;
  transition: color 0.2s ease;
}
.site-nav a::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 1px;
  background: var(--ink);
  transition: width 0.3s ease;
}
.site-nav a:hover, .site-nav a.active { color: var(--ink); }
.site-nav a:hover::after, .site-nav a.active::after { width: 100%; }

.menu-toggle {
  display: none;
  width: 32px; height: 32px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}
.menu-toggle span {
  display: block; width: 22px; height: 1px;
  background: var(--ink);
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.menu-toggle.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 880px) {
  .menu-toggle { display: flex; }
  .site-nav {
    position: fixed;
    top: 0; right: 0;
    width: 100%; max-width: 360px;
    height: 100vh;
    background: var(--paper);
    border-left: 1px solid var(--stone);
    transform: translateX(100%);
    transition: transform 0.4s cubic-bezier(0.77, 0, 0.175, 1);
    padding: 6rem 2rem 2rem;
  }
  .site-nav.open { transform: translateX(0); }
  .site-nav ul { flex-direction: column; align-items: flex-start; gap: 1.5rem; }
  .site-nav a { font-size: 1rem; }
}

/* === Hero === */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  padding-top: 6rem;
  padding-bottom: 4rem;
  overflow: hidden;
}
.hero-content { position: relative; z-index: 2; max-width: 920px; }
.hero-mark { width: clamp(72px, 12vw, 120px); height: auto; margin: 0 auto 2.5rem; opacity: 0; animation: fadeInUp 1s ease 0.1s forwards; }
.hero-wordmark {
  font-size: clamp(2.75rem, 9vw, 6.5rem);
  font-weight: 400;
  letter-spacing: 0.12em;
  line-height: 1;
  margin-bottom: 2rem;
  opacity: 0;
  animation: fadeInUp 1s ease 0.3s forwards;
}
.hero-baseline {
  font-family: var(--font-mono);
  font-size: clamp(0.85rem, 1.2vw, 1rem);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--graphite);
  margin-bottom: 3rem;
  opacity: 0;
  animation: fadeInUp 1s ease 0.5s forwards;
}
.hero-baseline span { display: inline-block; padding: 0 0.5em; }
.hero-baseline .sep { color: var(--stone); }

.hero-tagline {
  font-size: clamp(1.1rem, 1.8vw, 1.4rem);
  color: var(--graphite);
  font-weight: 300;
  max-width: 38ch;
  margin: 0 auto 3.5rem;
  opacity: 0;
  animation: fadeInUp 1s ease 0.7s forwards;
}
.hero-cta { opacity: 0; animation: fadeInUp 1s ease 0.9s forwards; }

/* Géométrie hexagonale en arrière-plan */
.hero-decor {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.5;
}
.hero-decor svg { position: absolute; }
.hero-decor .hex-1 { top: 10%; right: -8%; width: 40%; opacity: 0.18; }
.hero-decor .hex-2 { bottom: 5%; left: -10%; width: 35%; opacity: 0.12; }

/* === Boutons / CTA === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 1.05rem 2rem;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  transition: all 0.3s cubic-bezier(0.77, 0, 0.175, 1);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--ink);
  transform: translateY(101%);
  transition: transform 0.4s cubic-bezier(0.77, 0, 0.175, 1);
  z-index: -1;
}
.btn:hover { color: var(--paper); }
.btn:hover::before { transform: translateY(0); }
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary::before { background: var(--paper); }
.btn-primary:hover { color: var(--ink); }
.btn .arrow { transition: transform 0.3s ease; }
.btn:hover .arrow { transform: translateX(4px); }

/* === Inline link / text-link === */
.text-link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink);
  border-bottom: 1px solid var(--ink);
  padding-bottom: 2px;
  transition: opacity 0.2s ease;
}
.text-link:hover { opacity: 0.6; }

/* === Section header (eyebrow + titre) === */
.section-header { margin-bottom: clamp(3rem, 6vw, 5rem); max-width: 920px; }
.section-header.center { text-align: center; margin-left: auto; margin-right: auto; }

/* === Two-column layout === */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: clamp(2rem, 6vw, 6rem);
  align-items: start;
}
@media (max-width: 880px) { .two-col { grid-template-columns: 1fr; gap: 2rem; } }

/* === Numbered principles list === */
.principles { display: grid; gap: 0; }
.principle {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: clamp(1rem, 3vw, 3rem);
  padding: clamp(2rem, 4vw, 3rem) 0;
  border-top: 1px solid var(--stone);
  align-items: start;
}
.principle:last-child { border-bottom: 1px solid var(--stone); }
.principle-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  color: var(--dust);
  padding-top: 0.4rem;
}
.principle-title {
  font-size: clamp(1.25rem, 2vw, 1.6rem);
  font-weight: 400;
  margin-bottom: 0.75rem;
  letter-spacing: -0.005em;
}
.principle-body { color: var(--graphite); font-weight: 300; max-width: 60ch; }

/* === Services list === */
.services-list { display: grid; gap: 0; }
.service {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: clamp(1.5rem, 3vw, 3rem);
  padding: clamp(2.5rem, 5vw, 4rem) 0;
  border-top: 1px solid var(--stone);
  align-items: start;
}
.service:last-child { border-bottom: 1px solid var(--stone); }
.service-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.18em;
  color: var(--ink);
  padding-top: 0.5rem;
}
.service-title {
  font-size: clamp(1.4rem, 2.4vw, 2rem);
  font-weight: 400;
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}
.service-meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--dust);
  margin-top: 1.25rem;
}
.service-body { color: var(--graphite); font-weight: 300; max-width: 64ch; }

@media (max-width: 640px) {
  .principle, .service { grid-template-columns: 1fr; gap: 1rem; }
  .principle-num, .service-num { padding-top: 0; }
}

/* === Profiles list (Pour qui) === */
.profiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: clamp(2rem, 4vw, 3.5rem);
  margin-top: 3rem;
}
.profile {
  border-top: 1px solid var(--ink);
  padding-top: 1.25rem;
}
.profile-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  color: var(--dust);
  margin-bottom: 0.75rem;
  display: block;
}
.profile-text { font-size: 1.05rem; font-weight: 300; color: var(--ink); line-height: 1.45; }

/* === CTA Block === */
.cta-block {
  background: var(--ink);
  color: var(--paper);
  padding: clamp(4rem, 8vw, 7rem) clamp(2rem, 6vw, 5rem);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-block .eyebrow { color: var(--dust); }
.cta-block .section-title { color: var(--paper); margin-left: auto; margin-right: auto; }
.cta-block .lead { color: var(--stone); margin-left: auto; margin-right: auto; margin-bottom: 2.5rem; }
.cta-block .btn { border-color: var(--paper); color: var(--paper); }
.cta-block .btn::before { background: var(--paper); }
.cta-block .btn:hover { color: var(--ink); }

/* === Page hero (sous-pages) === */
.page-hero {
  padding-top: clamp(8rem, 18vw, 12rem);
  padding-bottom: clamp(3rem, 6vw, 5rem);
  text-align: center;
  border-bottom: 1px solid var(--stone);
}
.page-hero .eyebrow { display: block; margin-bottom: 1.5rem; }
.page-hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.05;
  max-width: 18ch;
  margin: 0 auto 1.5rem;
}
.page-hero .lead { margin-left: auto; margin-right: auto; }

/* === Form === */
.contact-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: clamp(2rem, 6vw, 5rem);
  align-items: start;
}
@media (max-width: 880px) { .contact-grid { grid-template-columns: 1fr; } }

form { display: grid; gap: 1.5rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }
.form-field { display: flex; flex-direction: column; gap: 0.5rem; }
.form-field label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dust);
}
.form-field input, .form-field textarea {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 300;
  color: var(--ink);
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--stone);
  padding: 0.75rem 0;
  outline: none;
  transition: border-color 0.2s ease;
  resize: vertical;
}
.form-field input:focus, .form-field textarea:focus { border-bottom-color: var(--ink); }
.form-field textarea { min-height: 120px; }
.form-error { color: #b94a3e; font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; }
.form-status {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  padding: 1rem;
  border: 1px solid var(--stone);
  display: none;
}
.form-status.success { display: block; border-color: var(--ink); color: var(--ink); }
.form-status.error { display: block; border-color: #b94a3e; color: #b94a3e; }

/* === Coordonnées === */
.contact-info { padding-top: 2rem; }
.contact-info dl { display: grid; gap: 2rem; }
.contact-info dt {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dust);
  margin-bottom: 0.4rem;
}
.contact-info dd {
  font-size: 1rem;
  color: var(--ink);
  font-weight: 300;
  line-height: 1.5;
}
.contact-info dd a { border-bottom: 1px solid var(--stone); padding-bottom: 1px; transition: border-color 0.2s ease; }
.contact-info dd a:hover { border-bottom-color: var(--ink); }
.delay-note {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dust);
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--stone);
}

/* === Legal page === */
.legal-content { max-width: 720px; margin: 0 auto; }
.legal-content h2 {
  font-size: 1.4rem;
  font-weight: 500;
  margin-top: 3.5rem;
  margin-bottom: 1.25rem;
  letter-spacing: -0.005em;
}
.legal-content h2:first-child { margin-top: 0; }
.legal-content p { margin-bottom: 1rem; line-height: 1.65; }
.legal-content strong { color: var(--ink); font-weight: 500; }

/* === Footer === */
.site-footer {
  background: var(--ink);
  color: var(--stone);
  padding: clamp(3rem, 6vw, 5rem) 0 2rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 4rem;
}
@media (max-width: 880px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; gap: 2rem; } }

.footer-brand .brand { color: var(--paper); margin-bottom: 1rem; }
.footer-brand p { color: var(--dust); font-size: 0.9rem; max-width: 32ch; }
.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--paper);
  font-weight: 400;
  margin-bottom: 1.25rem;
}
.footer-col ul { display: grid; gap: 0.6rem; }
.footer-col a {
  color: var(--stone);
  font-size: 0.9rem;
  font-weight: 300;
  transition: color 0.2s ease;
}
.footer-col a:hover { color: var(--paper); }

.footer-bottom {
  border-top: 1px solid rgba(212, 207, 193, 0.15);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.footer-bottom p {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dust);
  margin: 0;
}

/* === Animations === */
@keyframes fadeInUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.9s ease, transform 0.9s cubic-bezier(0.16, 1, 0.3, 1); }
.reveal.in-view { opacity: 1; transform: translateY(0); }
.reveal.delay-1 { transition-delay: 0.1s; }
.reveal.delay-2 { transition-delay: 0.2s; }
.reveal.delay-3 { transition-delay: 0.3s; }

/* === Accessibility / focus === */
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  .reveal { opacity: 1; transform: none; }
}