:root {
  --blue: #1a5a9e;
  --blue-light: #3a80d0;
  --orange: #FF8C00;
  --orange-dark: #e07b00;
  --text: #111827;
  --muted: #5c6b82;
  --bg-section: #eaf3fc;
  --bg-page: #F3F4F6;
  --card: #ffffff;
  --border: #e3e9f5;
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-pill: 999px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg-page);
  line-height: 1.6;
}

a {
  color: inherit;
}

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

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header ===== */

header.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
}

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

.logo {
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--blue);
  letter-spacing: -0.02em;
}

.logo-tagline {
  font-weight: 400;
  font-size: 0.85rem;
  color: var(--muted);
  letter-spacing: 0;
}

nav.main-nav ul {
  list-style: none;
  display: flex;
  gap: 32px;
  margin: 0;
  padding: 0;
}

nav.main-nav a {
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
}

nav.main-nav a:hover {
  color: var(--blue);
}

/* ===== Repère (badge étude de cas) ===== */

.case-study-banner {
  background: var(--blue);
  color: #fff;
  text-align: center;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 10px 16px;
  letter-spacing: 0.01em;
}

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

.hero {
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-light) 100%);
  color: #fff;
  padding: 96px 24px 110px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -120px;
  width: 360px;
  height: 360px;
  background: var(--orange);
  opacity: 0.25;
  border-radius: 50%;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -160px;
  left: -100px;
  width: 320px;
  height: 320px;
  background: #ffffff;
  opacity: 0.08;
  border-radius: 50%;
}

.hero-inner {
  position: relative;
  max-width: 760px;
  margin: 0 auto;
}

.hero h1 {
  font-size: clamp(2.1rem, 4.5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.15;
  margin: 0 0 22px;
  letter-spacing: -0.02em;
}

.hero p.subtitle {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.92);
  margin: 0 auto 40px;
  max-width: 600px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1rem;
  padding: 16px 34px;
  border-radius: var(--radius-pill);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn-orange {
  background: var(--orange);
  color: var(--text);
  box-shadow: 0 12px 28px rgba(255, 140, 0, 0.4);
}

.btn-orange:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 34px rgba(255, 140, 0, 0.48);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.6);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
}

/* ===== Sections génériques ===== */

section {
  padding: 88px 24px;
}

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}

.eyebrow {
  display: inline-block;
  background: rgba(26, 90, 158, 0.1);
  color: var(--blue);
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  margin-bottom: 16px;
}

.section-head h2 {
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 12px;
}

.section-head p {
  color: var(--muted);
  font-size: 1.05rem;
  margin: 0;
}

/* ===== Bénéfices ===== */

.benefits {
  background: var(--card);
}

.benefit-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.benefit-card {
  background: var(--bg-section);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  box-shadow: 0 6px 20px rgba(16, 32, 58, 0.06);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.benefit-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 30px rgba(16, 32, 58, 0.1);
}

.benefit-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
}

.benefit-icon.blue {
  background: var(--blue);
}

.benefit-icon.orange {
  background: var(--orange);
}

.benefit-icon svg {
  width: 28px;
  height: 28px;
  stroke: #fff;
}

.benefit-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 0 12px;
}

.benefit-card p {
  color: var(--muted);
  margin: 0;
  font-size: 0.98rem;
}

/* ===== Tarifs ===== */

.pricing {
  background: var(--bg-section);
}

.pricing-note {
  text-align: center;
  font-size: 0.85rem;
  color: var(--muted);
  font-style: italic;
  margin: -32px auto 48px;
  max-width: 480px;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.price-card {
  background: var(--card);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  text-align: center;
  border: 1px solid var(--border);
  box-shadow: 0 6px 20px rgba(16, 32, 58, 0.06);
  display: flex;
  flex-direction: column;
}

.price-card.featured {
  background: linear-gradient(160deg, var(--blue) 0%, var(--blue-light) 100%);
  color: #fff;
  border: none;
  transform: scale(1.04);
  box-shadow: 0 18px 40px rgba(26, 90, 158, 0.35);
}

.price-card .plan-badge {
  display: inline-block;
  align-self: center;
  background: var(--orange);
  color: var(--text);
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  margin-bottom: 16px;
}

.price-card h3 {
  font-size: 1.3rem;
  font-weight: 800;
  margin: 0 0 8px;
}

.price-card .price {
  font-size: 2.4rem;
  font-weight: 800;
  margin: 12px 0 4px;
  letter-spacing: -0.02em;
}

.price-card .price span {
  font-size: 1rem;
  font-weight: 600;
  opacity: 0.75;
}

.price-card .plan-detail {
  color: inherit;
  opacity: 0.8;
  font-size: 0.95rem;
  margin: 0 0 28px;
}

.price-card.featured .plan-detail {
  opacity: 0.9;
}

.price-card:not(.featured) .plan-detail {
  color: var(--muted);
}

.price-cta {
  margin-top: auto;
  display: inline-block;
  text-align: center;
  padding: 13px 20px;
  border-radius: var(--radius-pill);
  font-weight: 700;
  text-decoration: none;
  background: var(--blue);
  color: #fff;
}

.price-card.featured .price-cta {
  background: var(--orange);
  color: var(--text);
}

/* ===== Cas d'usage ===== */

.use-case {
  background: var(--card);
}

.use-case-panel {
  background: linear-gradient(135deg, #fff4e8 0%, #fdeee0 100%);
  border-radius: var(--radius-lg);
  padding: 52px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  border: 1px solid #fbe0c0;
}

.use-case-panel h2 {
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  font-weight: 800;
  margin: 0 0 16px;
  letter-spacing: -0.02em;
}

.use-case-panel p {
  color: var(--muted);
  margin: 0;
  font-size: 1.02rem;
}

.use-case-stat {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 32px;
  text-align: center;
  box-shadow: 0 10px 26px rgba(255, 140, 0, 0.16);
}

.use-case-stat .stat-number {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--orange);
  letter-spacing: -0.02em;
}

.use-case-stat .stat-label {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 6px;
}

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

.faq {
  background: var(--bg-section);
}

.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  box-shadow: 0 4px 14px rgba(16, 32, 58, 0.05);
}

.faq-item h3 {
  font-size: 1.02rem;
  font-weight: 700;
  margin: 0 0 10px;
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.faq-item h3 .q-mark {
  flex: none;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.faq-item p {
  margin: 0 0 0 36px;
  color: var(--muted);
  font-size: 0.97rem;
}

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

.contact {
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-light) 100%);
  color: #fff;
}

.contact .section-head p {
  color: rgba(255, 255, 255, 0.85);
}

.contact .section-head .eyebrow {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
}

.contact-form {
  max-width: 560px;
  margin: 0 auto;
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 44px;
  box-shadow: 0 24px 50px rgba(0, 0, 0, 0.25);
}

.form-row {
  margin-bottom: 20px;
}

.form-row label {
  display: block;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text);
  margin-bottom: 8px;
}

.form-row input,
.form-row textarea {
  width: 100%;
  padding: 13px 18px;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--border);
  font-family: inherit;
  font-size: 0.98rem;
  color: var(--text);
  background: var(--bg-section);
}

.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--blue);
}

.form-row textarea {
  resize: vertical;
  min-height: 110px;
}

.contact-form .btn {
  width: 100%;
  justify-content: center;
  margin-top: 6px;
}

.form-note {
  margin: 14px 0 0;
  font-size: 0.85rem;
  color: var(--muted);
  text-align: center;
  min-height: 1.2em;
}

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

footer.site-footer {
  background: #0d1a30;
  color: rgba(255, 255, 255, 0.75);
  padding: 48px 24px 32px;
  text-align: center;
  font-size: 0.9rem;
}

footer.site-footer .footer-brand {
  font-weight: 800;
  color: #fff;
  font-size: 1.1rem;
  margin-bottom: 12px;
}

footer.site-footer p {
  margin: 6px 0;
}

footer.site-footer .footer-links {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.85rem;
}

footer.site-footer .footer-links a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ===== Responsive ===== */

@media (max-width: 1024px) {
  .logo-tagline {
    font-size: 0.72rem;
  }
}

@media (max-width: 860px) {
  nav.main-nav {
    display: none;
  }

  .benefit-grid,
  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .price-card.featured {
    transform: none;
  }

  .use-case-panel {
    grid-template-columns: 1fr;
    padding: 32px 24px;
  }

  section {
    padding: 64px 20px;
  }

  .hero {
    padding: 72px 20px 88px;
  }

  .contact-form {
    padding: 30px 24px;
  }
}

@media (max-width: 480px) {
  .header-inner {
    padding: 16px 20px;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .hero-inner .btn {
    width: auto;
  }
}