/* ============================================================
   SITE-E-WORK — "Signal" Design System
   ★ Palette — modifiez ces variables pour tout changer
   ============================================================ */
:root {
  --bg:          #0A0C0E;
  --bg-2:        #111416;
  --bg-3:        #181C1F;
  --surface:     #1E2326;
  --surface-2:   #252B2F;

  --text:        #EEE9E0;
  --text-mid:    #8A9099;
  --text-dim:    #505860;

  --accent:      #63AAE0;   /* bleu électrique */
  --accent-dim:  #63A0E01F;
  --accent-glow: #63B4E040;

  --border:      #63A0E01F;
  --border-2:    #63B4E040;

  --font-display: 'Syne', sans-serif;
  --font-body:    'Inter', sans-serif;

  --ease:        cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out:    cubic-bezier(0, 0, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  --r-sm: 6px;
  --r-md: 12px;
  --r-lg: 20px;
  --r-xl: 32px;

  --nav-h: 72px;
}

/* ============================================================
   RESET
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }

/* ============================================================
   TYPOGRAPHIE
   ============================================================ */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text);
}
h1 { font-size: clamp(3rem, 7vw, 6.5rem); font-weight: 800; }
h2 { font-size: clamp(2rem, 4vw, 3.5rem); font-weight: 700; }
h3 { font-size: clamp(1.3rem, 2.5vw, 2rem); font-weight: 600; }
h4 { font-size: 1.1rem; font-weight: 600; }

p { color: var(--text-mid); line-height: 1.75; }
p + p { margin-top: 1rem; }

.lead {
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  color: var(--text-mid);
  line-height: 1.8;
  max-width: 600px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
}
.eyebrow::before {
  content: '';
  display: inline-block;
  width: 20px; height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

/* ============================================================
   LAYOUT
   ============================================================ */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2.5rem;
}
.container--narrow { max-width: 820px; }
.container--wide   { max-width: 1440px; }

.section { padding: 8rem 0; }
.section--sm { padding: 5rem 0; }

/* ============================================================
   NAVIGATION
   ============================================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 900;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  padding: 0 2.5rem;
  transition: background 0.4s var(--ease), border-color 0.4s var(--ease);
  border-bottom: 1px solid transparent;
  height: 100px;
}
.nav.scrolled {
  background: rgba(10,12,14,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-color: var(--border);
}

.nav__inner {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  display: flex; align-items: center; gap: 0.5rem;
}
.nav__logo-dot {
  width: 8px; height: 8px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--accent-glow);
  animation: pulse-dot 2.5s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 8px var(--accent-glow); }
  50%       { box-shadow: 0 0 20px var(--accent-glow), 0 0 40px var(--accent-dim); }
}

.nav__links {
  display: flex; align-items: center; gap: 2.5rem;
}
.nav__link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-mid);
  position: relative;
  transition: color 0.25s;
}
.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width 0.3s var(--ease-out);
}
.nav__link:hover, .nav__link.active { color: var(--text); }
.nav__link:hover::after, .nav__link.active::after { width: 100%; }

/* Item contact uniquement visible dans le menu burger mobile */
.nav__burger-cta-item { display: none; }

.nav__logo-img {
  width: 90px;
  height: 100%;
  border-radius: 6px;
  object-fit: contain;
}

.nav__logo-placeholder {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  border: 1.5px dashed rgba(99, 184, 224, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.55rem;
  font-weight: 700;
  color: rgba(99, 184, 224, 0.35);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-family: var(--font-body);
  flex-shrink: 0;
  /* Remplacez ce div par votre <img> une fois prêt */
}

.nav__cta {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--bg);
  background: var(--accent);
  padding: 0.55rem 1.4rem;
  border-radius: 999px;
  /* Pas de transform ici : évite le bug z-index/stacking context sur iOS avec position:fixed */
  transition: opacity 0.25s;
}
.nav__cta:hover { opacity: 0.88; }

.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px; padding: 4px;
}
.nav__burger span {
  display: block; width: 22px; height: 1.5px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.3s;
}
.nav__burger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav__burger.open span:nth-child(2) { opacity: 0; }
.nav__burger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ============================================================
   BOUTONS
   ============================================================ */
.btn {
  display: inline-flex; align-items: center; gap: 0.6rem;
  padding: 0.85rem 2rem;
  border-radius: 999px;
  font-size: 0.9rem; font-weight: 600;
  border: 1.5px solid transparent;
  transition: all 0.3s var(--ease-spring);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }

.btn--accent {
  background: var(--accent); color: var(--bg);
  border-color: var(--accent);
}
.btn--accent:hover { box-shadow: 0 8px 30px var(--accent-glow); }

.btn--ghost {
  background: transparent; color: var(--text);
  border-color: var(--border-2);
}
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }

.btn--sm { padding: 0.55rem 1.3rem; font-size: 0.82rem; }

/* ============================================================
   SCROLL REVEAL
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}
.reveal-left.visible { opacity: 1; transform: translateX(0); }
.reveal-right {
  opacity: 0;
  transform: translateX(50px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}
.reveal-right.visible { opacity: 1; transform: translateX(0); }

.delay-1 { transition-delay: 0.1s !important; }
.delay-2 { transition-delay: 0.2s !important; }
.delay-3 { transition-delay: 0.3s !important; }
.delay-4 { transition-delay: 0.4s !important; }
.delay-5 { transition-delay: 0.5s !important; }
.delay-6 { transition-delay: 0.6s !important; }

/* ============================================================
   CARDS
   ============================================================ */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 2rem;
  transition: border-color 0.3s, transform 0.3s var(--ease-spring), box-shadow 0.3s;
}
.card:hover {
  border-color: var(--border-2);
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

/* ============================================================
   SEPARATEUR
   ============================================================ */
.sep {
  width: 100%; height: 1px;
  background: var(--border);
  margin: 0;
}

/* ============================================================
   NOISE TEXTURE
   ============================================================ */
.noise::before {
  content: '';
  position: absolute; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none; z-index: 0;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  padding: 5rem 0 2.5rem;
}
.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 4rem;
  padding-bottom: 4rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2.5rem;
}
.footer__logo {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}
.footer__desc {
  font-size: 0.88rem;
  color: var(--text-dim);
  line-height: 1.8;
  max-width: 280px;
  margin-bottom: 1.5rem;
}
.footer__badge {
  display: inline-flex; align-items: center; gap: 0.4rem;
  font-size: 0.75rem; font-weight: 600;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  border: 1px solid rgba(99, 184, 224, 0.35);
}
.footer__col-title {
  font-size: 0.68rem; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text-dim); margin-bottom: 1.25rem;
}
.footer__links { display: flex; flex-direction: column; gap: 0.7rem; }
.footer__link {
  font-size: 0.88rem; color: var(--text-mid);
  transition: color 0.2s;
}
.footer__link:hover { color: var(--accent); }
.footer__contact-line {
  font-size: 0.88rem; color: var(--text-mid);
  margin-bottom: 0.6rem; display: flex; align-items: center; gap: 0.5rem;
}
.footer__contact-line a { transition: color 0.2s; }
.footer__contact-line a:hover { color: var(--accent); }
.footer__bottom {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 0.78rem; color: var(--text-dim);
}
.footer__bottom span:last-child { color: var(--text-dim); }

/* ============================================================
   UTILITAIRES
   ============================================================ */
.text-accent  { color: var(--accent); }
.text-center  { text-align: center; }
.grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: 1.5rem; }
.flex   { display: flex; }
.items-center { align-items: center; }
.gap-sm { gap: 1rem; }
.gap-md { gap: 1.5rem; }

/* ============================================================
   HERO PAGE (pages secondaires)
   ============================================================ */
.hero-inner {
  padding-top: calc(var(--nav-h) + 6rem);
  padding-bottom: 6rem;
  position: relative;
  overflow: hidden;
}
.hero-inner::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.4;
}
.hero-inner::after {
  content: '';
  position: absolute;
  top: -300px; right: -200px;
  width: 600px; height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99, 149, 224, 0.06) 0%, transparent 65%);
  pointer-events: none;
}
.hero-inner h1 { font-size: clamp(2.4rem, 5vw, 4.5rem); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 2.5rem; }
  .grid-4 { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 768px) {
  :root { --nav-h: 64px; }
  .container { padding: 0 1.25rem; }
  .section { padding: 5rem 0; }

  /* Overflow horizontal global */
  body, html { overflow-x: hidden; }

  /* Nav */
  .nav__links { display: none; }
  .nav__links.open {
    display: flex; flex-direction: column;
    position: fixed; top: var(--nav-h); left: 0; right: 0;
    /* Pas de backdrop-filter : crée un nouveau stacking context
       qui fait disparaître la navbar fixed sur iOS/Android */
    background: rgba(10,12,14,0.99);
    padding: 2rem 1.5rem 2.5rem;
    border-bottom: 1px solid var(--border);
    gap: 1.2rem; align-items: flex-start;
    box-shadow: 0 8px 30px rgba(0,0,0,0.6);
    z-index: 899;
  }
  /* Bouton Contact visible dans le menu burger */
  .nav__link--contact-mobile {
    display: inline-flex;
    align-items: center;
    background: var(--accent);
    color: var(--bg) !important;
    padding: 0.6rem 1.4rem;
    border-radius: 999px;
    font-size: 0.88rem;
    font-weight: 700;
    margin-top: 0.5rem;
  }
  .nav__link--contact-mobile::after { display: none !important; }

  .nav__cta-wrap { display: none; }
  .nav__burger { display: flex; }
  /* Afficher le bouton Contact dans le menu burger */
  .nav__burger-cta-item { display: block; }

  /* Grilles */
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }

  /* Footer */
  .footer__grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer__bottom { flex-direction: column; gap: 0.5rem; text-align: center; }

  /* Titres */
  h1 { font-size: clamp(2.2rem, 8vw, 3rem); }
  h2 { font-size: clamp(1.8rem, 6vw, 2.4rem); }

  /* Reveal translateX → translateY sur mobile pour éviter l'overflow */
  .reveal-left  { transform: translateY(30px) !important; }
  .reveal-right { transform: translateY(30px) !important; }
  .reveal-left.visible,
  .reveal-right.visible { transform: translateY(0) !important; }
}
@media (max-width: 480px) {
  .section { padding: 4rem 0; }
  .section--sm { padding: 3rem 0; }
}