/* ============================================
   NOSTRALE · Feuille de style partagée
   Variables, typo, layout commun, nav, footer
   ============================================ */

:root{
  --ns-blue: #006AFF;
  --ns-blue-dark: #0050C8;
  --ns-ink: #0B0B0B;
  --ns-ink-soft: #1c1c1c;
  --ns-muted: rgba(11,11,11,.62);
  --ns-muted-2: rgba(11,11,11,.45);
  --ns-bg: #FAFAF7;
  --ns-bg-alt: #F2F2EE;
  --ns-paper: #FFFFFF;
  --ns-border: rgba(11,11,11,.10);
  --ns-border-strong: rgba(11,11,11,.18);
  --ns-shadow-sm: 0 1px 2px rgba(11,11,11,.04);
  --ns-shadow-md: 0 12px 40px rgba(11,11,11,.06);
  --ns-shadow-lg: 0 24px 80px rgba(11,11,11,.10);

  --serif: "Instrument Serif", "Times New Roman", Georgia, serif;
  --sans: "Inter Tight", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --container: 1240px;
  --container-narrow: 920px;
  --container-legal: 820px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 34px;
}

/* ============ RESET / BASE ============ */
*{ box-sizing: border-box; margin: 0; padding: 0; }

html{ scroll-behavior: smooth; }

body{
  font-family: var(--sans);
  font-weight: 300;
  color: var(--ns-ink);
  background: var(--ns-bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-size: 17px;
}

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

img{ max-width: 100%; display: block; }

.container{
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}
.container-narrow{
  width: 100%;
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 32px;
}
.container-legal{
  width: 100%;
  max-width: var(--container-legal);
  margin: 0 auto;
  padding: 0 32px;
}

/* ============ BOUTONS ============ */
.btn{
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  font-family: var(--sans);
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform .2s ease, background .2s ease, color .2s ease, border-color .2s ease;
  white-space: nowrap;
}
.btn-primary{
  background: var(--ns-ink);
  color: #fff;
}
.btn-primary:hover{ background: var(--ns-blue); transform: translateY(-1px); }
.btn-primary .arrow{
  display: inline-block;
  transition: transform .2s ease;
}
.btn-primary:hover .arrow{ transform: translateX(3px); }
.btn-ghost{
  background: transparent;
  color: var(--ns-ink);
  border-color: var(--ns-border-strong);
}
.btn-ghost:hover{ background: var(--ns-ink); color: #fff; }

/* ============ NAV ============ */
.nav{
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250,250,247,.85);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--ns-border);
}
.nav-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}
.nav-logo{
  font-family: var(--serif);
  font-size: 26px;
  letter-spacing: -0.01em;
  color: var(--ns-ink);
  font-style: italic;
}
.nav-logo span{ color: var(--ns-blue); }
.nav-links{
  display: flex;
  gap: 36px;
  align-items: center;
}
.nav-links a{
  font-size: 14px;
  font-weight: 400;
  color: var(--ns-muted);
  transition: color .2s ease;
}
.nav-links a:hover{ color: var(--ns-ink); }
.nav-cta{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--ns-ink);
  color: #fff !important;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500 !important;
  transition: transform .2s ease, background .2s ease;
}
.nav-cta:hover{ background: var(--ns-blue); transform: translateY(-1px); }

@media (max-width: 860px){
  .nav-links a:not(.nav-cta){ display: none; }
}

/* ============ LABELS DE SECTION ============ */
.section-label{
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ns-blue);
  font-weight: 500;
  margin-bottom: 20px;
}

/* ============ FOOTER ============ */
.footer{
  padding: 64px 0 40px;
  background: var(--ns-ink);
  color: rgba(255,255,255,.6);
  font-size: 14px;
}
.footer-inner{
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}
.footer-logo{
  font-family: var(--serif);
  font-style: italic;
  font-size: 24px;
  color: #fff;
}
.footer-logo span{ color: var(--ns-blue); }
.footer-links{
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
  justify-content: center;
}
.footer-links a{ color: rgba(255,255,255,.6); transition: color .2s ease; }
.footer-links a:hover{ color: #fff; }
.footer-bottom{
  margin-top: 16px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,.1);
  width: 100%;
  text-align: center;
  font-size: 12px;
  color: rgba(255,255,255,.4);
}

/* ============ ANIMATIONS COMMUNES ============ */
@keyframes fadeUp{
  from{ opacity: 0; transform: translateY(20px); }
  to  { opacity: 1; transform: translateY(0); }
}
.reveal{
  opacity: 0;
  animation: fadeUp .8s cubic-bezier(.2,.7,.2,1) forwards;
}
.reveal-1{ animation-delay: .1s; }
.reveal-2{ animation-delay: .2s; }
.reveal-3{ animation-delay: .35s; }
.reveal-4{ animation-delay: .5s; }

/* ============ MOBILE ============ */
@media (max-width: 600px){
  .container, .container-narrow, .container-legal{ padding: 0 22px; }
}