/* ==========================================================================
   AI Sales Engine — Design System
   ========================================================================== */

:root {
  /* Couleurs */
  --bg-primary: #0a0e1a;
  --bg-secondary: #0f1424;
  --bg-tertiary: #161b2e;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.05);

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-faint: #64748b;

  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);

  --accent-violet: #8b5cf6;
  --accent-cyan: #06b6d4;
  --accent-pink: #ec4899;
  --gradient-brand: linear-gradient(135deg, #8b5cf6 0%, #06b6d4 100%);
  --gradient-warm: linear-gradient(135deg, #ec4899 0%, #8b5cf6 50%, #06b6d4 100%);
  --gradient-glow: radial-gradient(circle at 50% 0%, rgba(139, 92, 246, 0.18) 0%, transparent 60%);

  /* Typo */
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;

  /* Espacements */
  --container: 1200px;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 24px;

  /* Shadows */
  --shadow-glow: 0 0 60px rgba(139, 92, 246, 0.25);
  --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.4);
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Background ambient */
body::before {
  content: '';
  position: fixed;
  top: -300px; left: 50%;
  transform: translateX(-50%);
  width: 1400px; height: 800px;
  background: var(--gradient-glow);
  pointer-events: none;
  z-index: 0;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: 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: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

h1 { font-size: clamp(2.4rem, 5.5vw, 4.2rem); font-weight: 700; }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-weight: 600;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 1rem;
}

.gradient-text {
  background: var(--gradient-warm);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

p { color: var(--text-secondary); font-size: 1.05rem; }
.lead { font-size: clamp(1.05rem, 1.4vw, 1.25rem); color: var(--text-secondary); max-width: 640px; }

/* ==========================================================================
   Layout
   ========================================================================== */

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

section { padding: clamp(4rem, 8vw, 7rem) 0; position: relative; }
.section-narrow { padding: clamp(3rem, 6vw, 5rem) 0; }

.section-header { text-align: center; max-width: 720px; margin: 0 auto 3.5rem; }
.section-header p { color: var(--text-muted); margin-top: 1rem; }

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.header {
  position: sticky; top: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(10, 14, 26, 0.7);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  max-width: var(--container);
  margin: 0 auto;
}

.nav-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-logo-mark {
  width: 28px; height: 28px;
  border-radius: 8px;
  background: var(--gradient-brand);
  display: grid; place-items: center;
  font-size: 0.85rem;
  color: white;
  box-shadow: var(--shadow-glow);
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
  align-items: center;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
}
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--text-primary); }

.nav-cta { display: flex; gap: 0.75rem; align-items: center; }

.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  border-radius: 8px;
  border: 1px solid var(--border);
}
.nav-toggle span {
  display: block;
  width: 20px; height: 2px;
  background: var(--text-primary);
  margin: 4px auto;
  border-radius: 2px;
}

@media (max-width: 880px) {
  .nav-links {
    position: fixed;
    top: 64px; left: 0; right: 0;
    flex-direction: column;
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
    transform: translateY(-110%);
    transition: transform 0.3s ease;
    gap: 1.25rem;
  }
  .nav-links.open { transform: translateY(0); }
  .nav-toggle { display: block; }
  .nav-cta .btn { display: none; }
}

/* ==========================================================================
   Boutons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.95rem;
  font-family: var(--font-body);
  transition: all 0.25s ease;
  white-space: nowrap;
  cursor: pointer;
}

.btn-primary {
  background: var(--gradient-brand);
  color: white;
  box-shadow: 0 8px 24px rgba(139, 92, 246, 0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(139, 92, 246, 0.45);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
  backdrop-filter: blur(10px);
}
.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-violet);
}

.btn-ghost {
  color: var(--text-secondary);
  padding: 0.5rem 0.9rem;
}
.btn-ghost:hover { color: var(--text-primary); }

.btn-arrow::after {
  content: '→';
  transition: transform 0.2s ease;
}
.btn-arrow:hover::after { transform: translateX(4px); }

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  padding: clamp(4rem, 9vw, 7rem) 0 clamp(3rem, 6vw, 5rem);
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.9rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  backdrop-filter: blur(10px);
}
.hero-eyebrow .dot {
  width: 6px; height: 6px;
  background: #22c55e;
  border-radius: 50%;
  box-shadow: 0 0 8px #22c55e;
}

.hero h1 { margin-bottom: 1.5rem; }
.hero .lead { margin-bottom: 2rem; max-width: 560px; }

.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; }

.hero-trust {
  margin-top: 3rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.hero-trust-label {
  font-size: 0.8rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-weight: 600;
}
.hero-trust-logos {
  display: flex; gap: 1.5rem;
  flex-wrap: wrap;
  align-items: center;
}
.hero-trust-logos span {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--text-muted);
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.hero-visual {
  position: relative;
  aspect-ratio: 1;
  display: grid; place-items: center;
}

.hero-photo-frame {
  position: relative;
  width: 100%; max-width: 420px;
  aspect-ratio: 1;
  border-radius: 32px;
  overflow: hidden;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-strong);
}

.hero-photo-frame::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: 32px;
  background: var(--gradient-warm);
  z-index: -1;
  filter: blur(40px);
  opacity: 0.55;
}

.hero-photo-img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}

.hero-photo-fallback {
  width: 100%; height: 100%;
  display: grid; place-items: center;
  background: var(--gradient-warm);
  font-family: var(--font-display);
  font-size: 6rem;
  font-weight: 700;
  color: white;
  letter-spacing: -0.05em;
}

.hero-badges {
  position: absolute;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.hero-badge {
  display: flex; align-items: center; gap: 0.65rem;
  padding: 0.65rem 1rem;
  background: rgba(15, 20, 36, 0.85);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  font-size: 0.85rem;
  font-weight: 500;
  box-shadow: var(--shadow-card);
  white-space: nowrap;
}
.hero-badge-icon {
  width: 28px; height: 28px;
  border-radius: 8px;
  background: var(--gradient-brand);
  display: grid; place-items: center;
  font-size: 0.95rem;
}
.hero-badge-1 { top: 5%; left: -8%; }
.hero-badge-2 { bottom: 12%; right: -10%; }

@media (max-width: 880px) {
  .hero-grid { grid-template-columns: 1fr; gap: 3rem; }
  .hero-visual { order: -1; max-width: 360px; margin: 0 auto; }
  .hero-badges { display: none; }
}

/* ==========================================================================
   Cards & Grids
   ========================================================================== */

.grid { display: grid; gap: 1.5rem; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, transparent, transparent);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  transition: background 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
}
.card:hover::before {
  background: linear-gradient(135deg, var(--accent-violet), var(--accent-cyan));
}

.card-icon {
  width: 56px; height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(6, 182, 212, 0.2));
  border: 1px solid var(--border-strong);
  display: grid; place-items: center;
  margin-bottom: 1.25rem;
  font-size: 1.5rem;
}

.card h3 { margin-bottom: 0.6rem; }
.card p { color: var(--text-muted); font-size: 0.97rem; }

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 1.25rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent-cyan);
}
.card-link::after { content: '→'; transition: transform 0.2s ease; }
.card-link:hover::after { transform: translateX(4px); }

/* ==========================================================================
   Stats / Metrics
   ========================================================================== */

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 2rem;
  padding: 2.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
}
.stat-value {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
}
.stat-label {
  margin-top: 0.5rem;
  color: var(--text-muted);
  font-size: 0.92rem;
}

/* ==========================================================================
   Process / Steps
   ========================================================================== */

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  position: relative;
}

.step {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  position: relative;
}

.step-number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  background: var(--gradient-warm);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
  margin-bottom: 1rem;
  display: block;
}

.step h3 { margin-bottom: 0.6rem; }
.step p { color: var(--text-muted); }

/* ==========================================================================
   CTA Section
   ========================================================================== */

.cta-block {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.12), rgba(6, 182, 212, 0.08));
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: clamp(2.5rem, 5vw, 4rem);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-block::before {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.18), transparent 60%);
  pointer-events: none;
}
.cta-block > * { position: relative; }
.cta-block h2 { margin-bottom: 1rem; }
.cta-block p { color: var(--text-secondary); max-width: 560px; margin: 0 auto 2rem; }

/* ==========================================================================
   Lists / Bullets
   ========================================================================== */

.feature-list { list-style: none; display: flex; flex-direction: column; gap: 1rem; }
.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  color: var(--text-secondary);
}
.feature-list li::before {
  content: '';
  flex-shrink: 0;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-violet), var(--accent-cyan));
  display: grid; place-items: center;
  margin-top: 2px;
  background-image:
    linear-gradient(135deg, var(--accent-violet), var(--accent-cyan)),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='white' d='M6.4 11.2 3.2 8l1.13-1.13 2.07 2.07 4.47-4.47L12 5.6z'/%3E%3C/svg%3E");
  background-size: cover, 70%;
  background-repeat: no-repeat;
  background-position: center, center;
}

/* ==========================================================================
   Forms
   ========================================================================== */

.form { display: flex; flex-direction: column; gap: 1.25rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }

.form-field { display: flex; flex-direction: column; gap: 0.4rem; }
.form-label { font-size: 0.88rem; color: var(--text-secondary); font-weight: 500; }

.form-input, .form-textarea, .form-select {
  width: 100%;
  padding: 0.85rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.2s ease, background 0.2s ease;
}
.form-input:focus, .form-textarea:focus, .form-select:focus {
  outline: none;
  border-color: var(--accent-violet);
  background: var(--bg-card-hover);
}
.form-textarea { min-height: 140px; resize: vertical; font-family: inherit; }

.form-note { color: var(--text-faint); font-size: 0.85rem; }

/* ==========================================================================
   Contact Layout
   ========================================================================== */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3rem;
  align-items: start;
}
@media (max-width: 880px) { .contact-grid { grid-template-columns: 1fr; } }

.contact-info {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  backdrop-filter: blur(10px);
}
.contact-info h3 { margin-bottom: 1.5rem; }
.contact-item {
  display: flex; align-items: center; gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
}
.contact-item:last-child { border-bottom: none; }
.contact-item-icon {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(6, 182, 212, 0.2));
  display: grid; place-items: center;
  flex-shrink: 0;
  font-size: 1.1rem;
}
.contact-item-label { font-size: 0.82rem; color: var(--text-faint); text-transform: uppercase; letter-spacing: 0.1em; }
.contact-item-value { color: var(--text-primary); font-weight: 500; }
.contact-item-value:hover { color: var(--accent-cyan); }

/* ==========================================================================
   Timeline (parcours)
   ========================================================================== */

.timeline { display: flex; flex-direction: column; gap: 1rem; }
.timeline-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 1.5rem;
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  align-items: center;
}
@media (max-width: 600px) {
  .timeline-item { grid-template-columns: 1fr; gap: 0.5rem; }
}
.timeline-period {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--accent-cyan);
  font-size: 0.9rem;
}
.timeline-content h4 { font-size: 1.05rem; margin-bottom: 0.25rem; color: var(--text-primary); }
.timeline-content p { color: var(--text-muted); font-size: 0.95rem; }

/* ==========================================================================
   FAQ
   ========================================================================== */

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 0.75rem;
  overflow: hidden;
  transition: border-color 0.2s ease;
}
.faq-item[open] { border-color: var(--border-strong); }
.faq-item summary {
  cursor: pointer;
  padding: 1.25rem 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  list-style: none;
  font-family: var(--font-display);
  font-size: 1.02rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--accent-cyan);
  transition: transform 0.2s ease;
  font-weight: 300;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item-content { padding: 0 1.5rem 1.5rem; color: var(--text-secondary); }

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
  border-top: 1px solid var(--border);
  padding: 4rem 0 2rem;
  margin-top: 4rem;
  background: var(--bg-secondary);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}
@media (max-width: 880px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; } }
@media (max-width: 500px) { .footer-grid { grid-template-columns: 1fr; } }

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-top: 1rem;
  max-width: 360px;
}

.footer-col h5 {
  font-family: var(--font-display);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-faint);
  margin-bottom: 1rem;
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 0.6rem; }
.footer-col a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: color 0.2s ease;
}
.footer-col a:hover { color: var(--text-primary); }

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  color: var(--text-faint);
  font-size: 0.88rem;
}

/* ==========================================================================
   Page hero (intérieur)
   ========================================================================== */

.page-hero {
  padding: 5rem 0 3rem;
  text-align: center;
}
.page-hero h1 { max-width: 800px; margin: 0 auto 1.25rem; }
.page-hero p { max-width: 640px; margin: 0 auto; color: var(--text-secondary); font-size: 1.1rem; }

/* ==========================================================================
   Animations
   ========================================================================== */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ==========================================================================
   Utilities
   ========================================================================== */

.text-center { text-align: center; }
.mt-1 { margin-top: 0.5rem; } .mt-2 { margin-top: 1rem; } .mt-3 { margin-top: 1.5rem; } .mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; } .mb-2 { margin-bottom: 1rem; } .mb-3 { margin-bottom: 1.5rem; } .mb-4 { margin-bottom: 2rem; }