/* ===================================================================
   Sémaphore — carnet de bord maritime
   Encres profondes · papier chaud · or de lanterne
   =================================================================== */

:root {
  --ink:        #14202c;   /* encre profonde */
  --ink-2:      #1c2e3d;   /* encre soutenue */
  --ink-soft:   #2a3d4e;
  --paper:      #f5eeda;   /* papier chaud */
  --paper-2:    #efe5cb;   /* papier ombré */
  --paper-line: #e2d5b4;
  --gold:       #f8b840;   /* or de lanterne */
  --gold-deep:  #d9962a;
  --sea:        #2f6d86;   /* bleu courant */
  --sea-light:  #6dc2ca;
  --red-signal: #c0472f;
  --ink-70:     rgba(20, 32, 44, 0.70);
  --ink-55:     rgba(20, 32, 44, 0.55);
  --paper-70:   rgba(245, 238, 218, 0.72);
  --paper-45:   rgba(245, 238, 218, 0.45);

  --serif: "Hoefler Text", "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --sans:  "Avenir Next", "Avenir", "Segoe UI", "Helvetica Neue", system-ui, sans-serif;

  --maxw: 1180px;
  --r: 4px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    radial-gradient(circle at 18% 12%, rgba(216, 150, 42, 0.06), transparent 45%),
    radial-gradient(circle at 82% 78%, rgba(47, 109, 134, 0.06), transparent 45%);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3 { font-family: var(--serif); font-weight: 600; line-height: 1.08; letter-spacing: -0.01em; }

a { color: inherit; text-decoration: none; }

.ink-gold { color: var(--gold-deep); }

/* ---------- layout helpers ---------- */
.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 100px 28px;
}
.section__head { max-width: 760px; margin-bottom: 56px; }
.section__lead { margin-top: 16px; font-size: 1.18rem; color: var(--ink-70); }
.kicker {
  display: inline-block;
  font-family: var(--sans);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold-deep);
  margin-bottom: 14px;
}
.kicker::before { content: "✦ "; color: var(--gold); }
.section h2 { font-size: clamp(2rem, 4.4vw, 3rem); }
.eyebrow {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--sea);
  margin-bottom: 22px;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--sans);
  font-weight: 700;
  font-size: 0.98rem;
  letter-spacing: 0.01em;
  padding: 14px 26px;
  border-radius: var(--r);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, color 0.18s ease;
}
.btn--gold {
  background: var(--gold);
  color: var(--ink);
  box-shadow: 0 8px 22px -8px rgba(216, 150, 42, 0.75);
}
.btn--gold:hover { transform: translateY(-2px); box-shadow: 0 14px 30px -8px rgba(216, 150, 42, 0.85); background: #ffc652; }
.btn--ghost { border-color: rgba(20,32,44,0.28); color: var(--ink); }
.btn--ghost:hover { border-color: var(--ink); transform: translateY(-2px); }
.btn--sm { padding: 9px 18px; font-size: 0.86rem; background: var(--gold); color: var(--ink); }
.btn--sm:hover { background: #ffc652; }
.btn--lg { padding: 18px 40px; font-size: 1.08rem; }

/* ===================== NAV ===================== */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 14px 28px;
  background: var(--paper-70);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border-bottom: 1px solid rgba(20,32,44,0.08);
  transition: box-shadow 0.25s ease, background 0.25s ease;
}
.nav.is-scrolled { box-shadow: 0 6px 24px -12px rgba(20,32,44,0.4); background: rgba(245,238,218,0.9); }
.nav__brand {
  display: flex; align-items: center; gap: 11px;
  font-family: var(--serif); font-size: 1.28rem; font-weight: 600;
  letter-spacing: 0.01em;
}
.nav__mark { border-radius: 8px; box-shadow: 0 2px 8px -3px rgba(20,32,44,0.5); }
.nav__links { display: flex; gap: 26px; margin-left: auto; font-size: 0.94rem; font-weight: 500; }
.nav__links a { color: var(--ink-70); position: relative; padding: 4px 0; }
.nav__links a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; width: 0; height: 2px;
  background: var(--gold); transition: width 0.22s ease;
}
.nav__links a:hover { color: var(--ink); }
.nav__links a:hover::after { width: 100%; }
.nav .btn { margin-left: 8px; }

/* ===================== HERO ===================== */
.hero {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(160deg, var(--ink) 0%, var(--ink-2) 55%, #24455a 100%);
  color: var(--paper);
  padding: 72px 28px 96px;
}
.hero__wash {
  position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(ellipse 40% 55% at 78% 30%, rgba(248,184,64,0.16), transparent 70%),
    radial-gradient(ellipse 60% 50% at 15% 90%, rgba(47,109,134,0.35), transparent 70%);
}
.hero__inner {
  position: relative; z-index: 1;
  max-width: var(--maxw); margin: 0 auto;
  display: grid; grid-template-columns: 1fr 1.02fr; gap: 56px; align-items: center;
}
.hero__copy .eyebrow { color: var(--gold); }
.hero__title {
  font-size: clamp(2.6rem, 6vw, 4.35rem);
  line-height: 1.02;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}
.hero__title .ink-gold { color: var(--gold); }
.hero__sub {
  font-size: clamp(1.05rem, 1.5vw, 1.24rem);
  color: var(--paper-70);
  max-width: 34em;
  margin-bottom: 34px;
}
.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 38px; }
.hero__cta .btn--ghost { border-color: rgba(245,238,218,0.32); color: var(--paper); }
.hero__cta .btn--ghost:hover { border-color: var(--paper); background: rgba(245,238,218,0.06); }
.hero__ticks {
  list-style: none; display: flex; flex-wrap: wrap; gap: 10px 22px;
  font-size: 0.9rem; color: var(--paper-70);
}
.hero__ticks li { position: relative; padding-left: 22px; }
.hero__ticks li::before {
  content: "◆"; position: absolute; left: 0; top: 0; color: var(--gold); font-size: 0.7rem;
}
.hero__ticks strong { color: var(--paper); font-weight: 700; }

.hero__art { display: flex; flex-direction: column; gap: 12px; }
.hero__art figcaption, .usecase__art figcaption {
  font-family: var(--serif); font-style: italic;
  font-size: 0.92rem; color: var(--paper-70); text-align: center;
}

/* painted map frame */
.frame {
  position: relative;
  border-radius: 6px;
  padding: 9px;
  background:
    linear-gradient(135deg, #e8cd86, #c79a3f 45%, #8a6420 100%);
  box-shadow:
    0 30px 60px -24px rgba(0,0,0,0.6),
    0 2px 0 rgba(255,255,255,0.2) inset;
}
.frame::after {
  content: ""; position: absolute; inset: 9px;
  border: 1.5px solid rgba(20,32,44,0.35); border-radius: 3px; pointer-events: none;
}
.frame img { display: block; width: 100%; height: auto; border-radius: 3px; }
.frame--dark { background: linear-gradient(135deg, #45566a, #22333f 55%, #101b24 100%); }

/* ---------- gapline ---------- */
.gapline {
  background: var(--ink);
  color: var(--paper);
  text-align: center;
  padding: 40px 28px;
}
.gapline p {
  max-width: 900px; margin: 0 auto;
  font-family: var(--serif); font-size: clamp(1.15rem, 2.4vw, 1.7rem);
  font-style: italic; line-height: 1.4; color: var(--paper);
}
.gapline em { color: var(--gold); font-style: italic; }

/* ===================== PROBLÈME ===================== */
.problem__grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px;
}
.card {
  background: var(--paper-2);
  border: 1px solid var(--paper-line);
  border-radius: var(--r);
  padding: 30px 26px;
  position: relative;
  box-shadow: 0 12px 30px -22px rgba(20,32,44,0.5);
  transition: transform 0.22s ease, box-shadow 0.22s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 20px 40px -24px rgba(20,32,44,0.55); }
.card__num {
  font-family: var(--serif); font-size: 2rem; color: var(--gold-deep);
  display: block; margin-bottom: 12px; opacity: 0.85;
}
.card h3 { font-size: 1.28rem; margin-bottom: 10px; }
.card p { color: var(--ink-70); font-size: 0.98rem; }
.problem__punch {
  margin-top: 44px; text-align: center;
  font-family: var(--serif); font-style: italic;
  font-size: clamp(1.2rem, 2.6vw, 1.7rem);
  color: var(--ink);
}

/* ===================== PILIERS ===================== */
.pillars { padding-top: 60px; }
.pillar {
  display: grid; grid-template-columns: 120px 1fr; gap: 34px;
  align-items: start;
  padding: 40px 0;
  border-top: 1px solid var(--paper-line);
}
.pillar:last-of-type { border-bottom: 1px solid var(--paper-line); }
.pillar__index span {
  font-family: var(--serif);
  font-size: 3.6rem;
  line-height: 1;
  color: var(--ink);
  -webkit-text-stroke: 1px var(--gold-deep);
  color: transparent;
  display: block;
}
.pillar__body h3 { font-size: clamp(1.5rem, 3vw, 2.1rem); margin-bottom: 12px; }
.pillar__body p { font-size: 1.08rem; color: var(--ink-70); max-width: 62ch; }
.pillar__tags {
  list-style: none; display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px;
}
.pillar__tags li {
  font-size: 0.82rem; font-weight: 600; letter-spacing: 0.02em;
  padding: 6px 13px; border-radius: 100px;
  background: var(--ink); color: var(--paper);
}

/* ===================== MÉTHODE ===================== */
.method { background: transparent; }
.steps {
  list-style: none;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
  counter-reset: step;
}
.step {
  position: relative;
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--r);
  padding: 30px 24px 28px;
  overflow: hidden;
}
.step::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--gold), var(--gold-deep));
}
.step__no {
  font-family: var(--serif); font-size: 1.5rem; font-weight: 600;
  width: 46px; height: 46px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: rgba(248,184,64,0.14); color: var(--gold);
  border: 1.5px solid rgba(248,184,64,0.45);
  margin-bottom: 18px;
}
.step h3 { font-size: 1.24rem; margin-bottom: 8px; color: var(--paper); }
.step p { font-size: 0.94rem; color: var(--paper-70); }

/* ===================== CAS D'USAGE ===================== */
.usecase {
  background: linear-gradient(165deg, var(--ink-2), var(--ink) 85%);
  color: var(--paper);
  max-width: none;
  padding: 100px 28px;
}
.usecase__grid {
  max-width: var(--maxw); margin: 0 auto;
  display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center;
}
.usecase__art { display: flex; flex-direction: column; gap: 12px; }
.usecase__copy .kicker { color: var(--gold); }
.usecase__copy h2 { font-size: clamp(1.9rem, 3.6vw, 2.7rem); margin-bottom: 20px; color: var(--paper); }
.usecase__copy p { color: var(--paper-70); margin-bottom: 16px; font-size: 1.05rem; }
.usecase__copy strong { color: var(--paper); }
.stats {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 30px;
}
.stat {
  border: 1px solid rgba(245,238,218,0.16);
  border-radius: var(--r);
  padding: 18px 18px;
  background: rgba(245,238,218,0.04);
}
.stat strong {
  display: block; font-family: var(--serif); font-size: 1.9rem; color: var(--gold);
  line-height: 1;
}
.stat span { display: block; margin-top: 6px; font-size: 0.85rem; color: var(--paper-70); }

/* ===================== FAQ ===================== */
.faq__list { max-width: 860px; }
.qa {
  border-bottom: 1px solid var(--paper-line);
  padding: 8px 0;
}
.qa summary {
  cursor: pointer; list-style: none;
  font-family: var(--serif); font-size: clamp(1.1rem, 2.2vw, 1.35rem);
  padding: 18px 40px 18px 0;
  position: relative; color: var(--ink);
}
.qa summary::-webkit-details-marker { display: none; }
.qa summary::after {
  content: "+"; position: absolute; right: 4px; top: 50%; transform: translateY(-50%);
  font-family: var(--sans); font-size: 1.6rem; color: var(--gold-deep);
  transition: transform 0.25s ease;
}
.qa[open] summary::after { content: "–"; }
.qa p {
  color: var(--ink-70); font-size: 1.02rem; padding: 0 40px 22px 0;
  max-width: 68ch;
  animation: fadeUp 0.35s ease;
}

/* ===================== CTA FINAL ===================== */
.finalcta {
  position: relative; overflow: hidden;
  background:
    linear-gradient(150deg, var(--ink) 0%, #24455a 100%);
  color: var(--paper);
  text-align: center;
  padding: 96px 28px;
}
.finalcta::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(ellipse 50% 60% at 50% 0%, rgba(248,184,64,0.2), transparent 70%);
  pointer-events: none;
}
.finalcta__inner { position: relative; max-width: 680px; margin: 0 auto; }
.finalcta h2 { font-size: clamp(2rem, 4.6vw, 3.1rem); margin-bottom: 16px; }
.finalcta p { color: var(--paper-70); font-size: 1.15rem; margin-bottom: 32px; }

/* ===================== FOOTER ===================== */
.footer {
  background: var(--ink);
  color: var(--paper-70);
  padding: 40px 28px;
  text-align: center;
  display: flex; flex-direction: column; align-items: center; gap: 10px;
}
.footer__brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--serif); font-size: 1.2rem; color: var(--paper);
}
.footer__brand img { border-radius: 6px; }
.footer__tag { font-family: var(--serif); font-style: italic; }
.footer__meta { font-size: 0.85rem; }
.footer__meta a { color: var(--gold); }

/* ===================== ANIMATIONS ===================== */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s cubic-bezier(0.2, 0.7, 0.2, 1), transform 0.7s cubic-bezier(0.2, 0.7, 0.2, 1);
  will-change: opacity, transform;
}
.reveal.is-visible { opacity: 1; transform: none; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation: none !important; }
}

/* ===================== RESPONSIVE ===================== */
@media (max-width: 940px) {
  .hero__inner { grid-template-columns: 1fr; gap: 44px; }
  .hero__art { order: -1; max-width: 560px; }
  .problem__grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .usecase__grid { grid-template-columns: 1fr; gap: 40px; }
  .usecase__art { max-width: 620px; }
  .nav__links { display: none; }
  .pillar { grid-template-columns: 1fr; gap: 14px; }
  .pillar__index span { font-size: 2.6rem; }
}
@media (max-width: 560px) {
  .section { padding: 72px 20px; }
  .hero { padding: 52px 20px 72px; }
  .steps { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr; }
  .nav { gap: 12px; padding: 12px 18px; }
  .nav .btn { display: none; }
  .hero__cta .btn { flex: 1; }
}