/* ═══════════════════════════════════════════
   RESET & BASE
════════════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root { color-scheme: light only; }

:root {
  --navy:   #1B2A4A;
  --blue:   #3B82F6;
  --blue-light: #60A5FA;
  --blue-pale:  #EFF6FF;
  --gray:   #6B7280;
  --gray-light: #F5F7FA;
  --white:  #FFFFFF;
  --radius: 16px;
  --shadow: 0 4px 24px rgba(27,42,74,.10);
  --shadow-lg: 0 12px 48px rgba(27,42,74,.15);
  --transition: .3s cubic-bezier(.4,0,.2,1);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  color: var(--navy);
  background: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.accent { color: var(--blue); }

.section-label {
  display: inline-block;
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--blue);
  background: var(--blue-pale);
  padding: 4px 14px;
  border-radius: 99px;
  margin-bottom: 16px;
}

h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 40px;
}

section { padding: 96px 0; }

/* ═══════════════════════════════════════════
   BUTTONS
════════════════════════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 10px;
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  border: 2px solid transparent;
}

.btn-primary {
  background: var(--blue);
  color: var(--white);
}
.btn-primary:hover { background: #2563EB; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(59,130,246,.35); }

.btn-outline {
  background: transparent;
  color: var(--blue);
  border-color: var(--blue);
}
.btn-outline:hover { background: var(--blue); color: var(--white); }

.btn-ghost {
  background: transparent;
  color: var(--navy);
  border-color: rgba(27,42,74,.2);
}
.btn-ghost:hover { border-color: var(--navy); }

.btn-large { padding: 18px 40px; font-size: 1.1rem; border-radius: 12px; }

/* ═══════════════════════════════════════════
   HEADER
════════════════════════════════════════════ */
#header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255,255,255,.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(27,42,74,.08);
  transition: box-shadow var(--transition);
}
#header.scrolled { box-shadow: var(--shadow); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo img { height: 80px; width: auto; }

nav { display: flex; align-items: center; gap: 8px; }

nav a {
  font-size: .9rem;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 8px;
  color: var(--gray);
  transition: var(--transition);
}
nav a:hover { color: var(--navy); background: var(--gray-light); }

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.burger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--navy);
  border-radius: 2px;
  transition: var(--transition);
}

/* ═══════════════════════════════════════════
   HERO
════════════════════════════════════════════ */
#hero {
  padding-top: 160px;
  padding-bottom: 100px;
  background: linear-gradient(135deg, var(--white) 0%, var(--blue-pale) 100%);
  position: relative;
  overflow: hidden;
}

#hero::before {
  content: '';
  position: absolute;
  top: -200px; right: -200px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(59,130,246,.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 40px;
}

.hero-logo img {
  width: 420px;
  max-width: 90vw;
  filter: drop-shadow(0 8px 32px rgba(59,130,246,.2));
}

.hero-text h1 {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 24px;
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--gray);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 580px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; }

.hero-scroll-hint {
  position: absolute;
  bottom: 32px; left: 50%;
  transform: translateX(-50%);
}
.hero-scroll-hint span {
  display: block;
  width: 2px; height: 40px;
  background: linear-gradient(to bottom, var(--blue), transparent);
  margin: 0 auto;
  animation: scroll-hint 1.8s ease-in-out infinite;
}
@keyframes scroll-hint {
  0% { opacity: 1; transform: scaleY(1) translateY(0); }
  100% { opacity: 0; transform: scaleY(.5) translateY(20px); }
}

/* ═══════════════════════════════════════════
   PROBLÈME
════════════════════════════════════════════ */
#probleme { background: var(--white); }

#probleme h2 { max-width: 640px; }

.pain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}

.pain-card {
  background: var(--gray-light);
  border-radius: var(--radius);
  padding: 32px 28px;
  border: 1px solid rgba(27,42,74,.06);
  transition: var(--transition);
}
.pain-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }

.pain-icon {
  width: 52px; height: 52px;
  background: var(--blue-pale);
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
}
.pain-icon svg { width: 26px; height: 26px; color: var(--blue); }
.pain-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 10px; }
.pain-card p { font-size: .9rem; color: var(--gray); line-height: 1.65; }

.pain-conclusion {
  text-align: center;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--blue);
  padding: 24px;
  background: var(--blue-pale);
  border-radius: var(--radius);
  border-left: 4px solid var(--blue);
}

/* ═══════════════════════════════════════════
   SERVICES
════════════════════════════════════════════ */
#services { background: var(--gray-light); }

.services-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.service-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 40px 36px;
  border: 2px solid transparent;
  position: relative;
  transition: var(--transition);
  box-shadow: var(--shadow);
}
.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.service-card.featured { border-color: var(--blue); }

.service-badge {
  position: absolute;
  top: -14px; right: 24px;
  background: var(--blue);
  color: var(--white);
  font-size: .75rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 99px;
}

.service-icon {
  width: 56px; height: 56px;
  background: var(--blue-pale);
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
}
.service-icon svg { width: 28px; height: 28px; color: var(--blue); }
.service-card h3 { font-size: 1.25rem; font-weight: 800; margin-bottom: 8px; }

.service-tag {
  font-size: .8rem;
  color: var(--blue);
  font-weight: 600;
  margin-bottom: 24px;
}

.service-card ul {
  list-style: none;
  margin-bottom: 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.service-card li {
  font-size: .9rem;
  color: var(--gray);
  padding-left: 20px;
  position: relative;
  line-height: 1.5;
}
.service-card li::before {
  content: '→';
  position: absolute; left: 0;
  color: var(--blue);
  font-weight: 700;
}

/* ═══════════════════════════════════════════
   PROCESSUS
════════════════════════════════════════════ */
#processus { background: var(--white); }

.steps {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.step {
  flex: 1;
  background: var(--gray-light);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: var(--transition);
}
.step:hover { background: var(--blue-pale); transform: translateY(-4px); }

.step-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--blue);
  opacity: .4;
  margin-bottom: 12px;
  line-height: 1;
}

.step-content h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.step-content p { font-size: .875rem; color: var(--gray); line-height: 1.6; }

.step-arrow {
  font-size: 1.5rem;
  color: var(--blue);
  opacity: .4;
  padding-top: 36px;
  flex-shrink: 0;
}

/* ═══════════════════════════════════════════
   CAS CONCRET
════════════════════════════════════════════ */
#cas-concret { background: var(--gray-light); }

.case-study {
  background: var(--white);
  border-radius: var(--radius);
  padding: 48px 44px;
  box-shadow: var(--shadow);
}

.case-profile {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
}

.case-avatar {
  width: 52px; height: 52px;
  background: var(--blue-pale);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.case-avatar svg { width: 26px; height: 26px; color: var(--blue); }

.case-profile strong { display: block; font-size: 1.1rem; font-weight: 700; }
.case-profile span { font-size: .875rem; color: var(--gray); }

.case-columns {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 24px;
  align-items: start;
  margin-bottom: 32px;
}

.case-before, .case-after {
  padding: 24px;
  border-radius: 12px;
}
.case-before { background: #FEF2F2; border-left: 4px solid #EF4444; }
.case-after  { background: #F0FDF4; border-left: 4px solid #22C55E; }

.case-before h4 { color: #DC2626; font-weight: 700; margin-bottom: 12px; }
.case-after  h4 { color: #16A34A; font-weight: 700; margin-bottom: 12px; }

.case-before ul, .case-after ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.case-before li, .case-after li {
  font-size: .875rem;
  color: var(--navy);
  padding-left: 18px;
  position: relative;
}
.case-before li::before { content: '✕'; position: absolute; left: 0; color: #EF4444; font-size: .8rem; }
.case-after  li::before { content: '✓'; position: absolute; left: 0; color: #22C55E; font-weight: 700; }

.case-arrow {
  font-size: 2rem;
  color: var(--blue);
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 48px;
}

.case-quote {
  border-left: 4px solid var(--blue);
  padding: 16px 24px;
  background: var(--blue-pale);
  border-radius: 0 12px 12px 0;
  font-style: italic;
  color: var(--navy);
  font-size: .95rem;
}

/* ═══════════════════════════════════════════
   À PROPOS
════════════════════════════════════════════ */
#apropos { background: var(--white); }

.about-inner {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 72px;
  align-items: center;
}

.about-photo img {
  width: 100%;
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  object-fit: cover;
  aspect-ratio: 3/4;
}

.about-text h2 { margin-bottom: 24px; }
.about-text p { color: var(--gray); margin-bottom: 20px; line-height: 1.75; font-size: .975rem; }
.about-text p strong { color: var(--navy); }

.about-values {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 32px;
}
.value {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--blue-pale);
  color: var(--blue);
  font-weight: 600;
  font-size: .875rem;
  padding: 8px 16px;
  border-radius: 99px;
}
.value svg { width: 16px; height: 16px; flex-shrink: 0; }

/* ═══════════════════════════════════════════
   CONTACT
════════════════════════════════════════════ */
#contact {
  background: linear-gradient(135deg, var(--navy) 0%, #2D4A8A 100%);
  color: var(--white);
  text-align: center;
}

.contact-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
}

#contact .section-label { background: rgba(255,255,255,.15); color: var(--white); }
#contact h2 { color: var(--white); margin-bottom: 16px; }
#contact .accent { color: var(--blue-light); }

.contact-sub {
  font-size: 1.05rem;
  color: rgba(255,255,255,.75);
  max-width: 500px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

#contact .btn-primary {
  background: var(--blue-light);
  font-size: 1.05rem;
  padding: 18px 40px;
}
#contact .btn-primary:hover { background: var(--white); color: var(--navy); }

.contact-reassure {
  margin-top: 16px;
  font-size: .85rem;
  color: rgba(255,255,255,.5);
}

.contact-divider {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 48px auto 36px;
  max-width: 560px;
  width: 100%;
}
.contact-divider::before,
.contact-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: rgba(255,255,255,.2);
}
.contact-divider span {
  font-size: .85rem;
  color: rgba(255,255,255,.5);
  white-space: nowrap;
}

.contact-form {
  width: 100%;
  max-width: 560px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  text-align: left;
  margin: 0 auto;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: .85rem;
  font-weight: 600;
  color: rgba(255,255,255,.8);
}

.form-group input,
.form-group textarea {
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 10px;
  padding: 12px 16px;
  font-size: .95rem;
  font-family: inherit;
  color: var(--white);
  transition: var(--transition);
  outline: none;
  resize: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(255,255,255,.35);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--blue-light);
  background: rgba(255,255,255,.15);
}

.form-success {
  display: none;
  background: rgba(34,197,94,.15);
  border: 1px solid rgba(34,197,94,.4);
  color: #86efac;
  padding: 14px 20px;
  border-radius: 10px;
  font-size: .9rem;
  text-align: center;
}
.form-success.visible { display: block; }

/* ═══════════════════════════════════════════
   FOOTER
════════════════════════════════════════════ */
footer {
  background: var(--navy);
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 40px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}
.footer-logo img { height: 52px; filter: brightness(10); opacity: .9; }
.footer-logo span { color: rgba(255,255,255,.5); font-size: .8rem; }

.footer-links {
  display: flex;
  gap: 24px;
}
.footer-links a { color: rgba(255,255,255,.5); font-size: .875rem; transition: var(--transition); }
.footer-links a:hover { color: var(--white); }

.footer-legal {
  display: flex;
  gap: 20px;
  align-items: center;
  font-size: .8rem;
  color: rgba(255,255,255,.35);
}
.footer-legal a { color: rgba(255,255,255,.5); }
.footer-legal a:hover { color: var(--white); }

/* ═══════════════════════════════════════════
   ANIMATIONS AU SCROLL
════════════════════════════════════════════ */
[data-animate] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease, transform .6s ease;
}
[data-animate].visible {
  opacity: 1;
  transform: translateY(0);
}

/* ═══════════════════════════════════════════
   RESPONSIVE
════════════════════════════════════════════ */
@media (max-width: 900px) {
  .hero-logo img { width: 280px; }
  .hero-actions { justify-content: center; }

  .pain-grid { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: 1fr; }

  .steps {
    flex-direction: column;
    gap: 16px;
  }
  .step-arrow { transform: rotate(90deg); padding: 0; align-self: center; }

  .case-columns { grid-template-columns: 1fr; }
  .case-arrow { display: none; }

  .about-inner { grid-template-columns: 1fr; }
  .about-photo img { max-width: 280px; margin: 0 auto; aspect-ratio: 1/1; }
  .about-text { text-align: center; }
  .about-values { justify-content: center; }

  .footer-inner { flex-direction: column; text-align: center; }
  .footer-links { justify-content: center; }
  .footer-legal { justify-content: center; }
}

@media (max-width: 640px) {
  nav { display: none; flex-direction: column; position: absolute; top: 72px; left: 0; right: 0; background: var(--white); padding: 16px; border-bottom: 1px solid rgba(27,42,74,.1); gap: 4px; box-shadow: var(--shadow); }
  nav.open { display: flex; }
  nav a { padding: 12px 16px; border-radius: 8px; }

  .burger { display: flex; }

  section { padding: 64px 0; }
  #hero { padding-top: 120px; }

  .case-study { padding: 28px 20px; }
  .service-card { padding: 28px 24px; }
}