*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --lt-green: #1f6b3a;
  --lt-green-dark: #164f2b;
  --lt-blue: #2b7fc4;
  --lt-lime: #8dc63f;
  --lt-cyan: #00adef;
  --lt-white: #ffffff;
  --lt-ink: #2c3e50;
  --lt-mid: #5f6f7a;
  --lt-mist: #f4f9f5;
  --lt-line: rgba(31, 107, 58, 0.12);
  --lt-radius: 16px;
  --lt-shell-max: 1100px;
}
html { scroll-behavior: smooth; }
body {
  font-family: "DM Sans", sans-serif;
  font-weight: 300;
  color: var(--lt-ink);
  background: var(--lt-white);
  overflow-x: hidden;
}
.shell {
  width: min(100% - 48px, var(--lt-shell-max));
  margin: 0 auto;
}
.demo-banner {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: var(--lt-lime);
  color: var(--lt-green-dark);
  text-align: center;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 7px 16px;
}
.lt-nav {
  position: fixed;
  top: 32px;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--lt-line);
}
.lt-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  gap: 16px;
}
.lt-nav-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}
.lt-nav-logo img {
  height: 52px;
  width: auto;
}
.lt-nav a.cta-nav {
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--lt-white);
  background: var(--lt-green);
  padding: 10px 22px;
  border-radius: 100px;
  transition: background 0.2s, transform 0.15s;
  white-space: nowrap;
}
.lt-nav a.cta-nav:hover {
  background: var(--lt-blue);
  transform: translateY(-1px);
}
#lt-hero {
  min-height: 88vh;
  display: flex;
  align-items: center;
  padding: 160px 0 80px;
  position: relative;
  overflow: hidden;
}
.lt-hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(ellipse 70% 60% at 85% 40%, rgba(43, 127, 196, 0.12) 0%, transparent 65%),
    radial-gradient(ellipse 55% 55% at 10% 85%, rgba(141, 198, 63, 0.14) 0%, transparent 60%),
    var(--lt-white);
}
.lt-hero-inner {
  position: relative;
  z-index: 1;
}
.lt-hero-content {
  max-width: 620px;
}
.lt-hero-eyebrow {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--lt-blue);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.lt-hero-eyebrow::before {
  content: "";
  display: block;
  width: 28px;
  height: 2px;
  background: var(--lt-cyan);
  border-radius: 2px;
}
h1 {
  font-family: "DM Serif Display", serif;
  font-size: clamp(2.2rem, 4.5vw, 3.6rem);
  line-height: 1.15;
  color: var(--lt-green);
  margin-bottom: 24px;
}
h1 em {
  font-style: italic;
  color: var(--lt-blue);
}
.lt-hero-sub {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--lt-mid);
  max-width: 520px;
  margin-bottom: 36px;
}
.lt-hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.btn-lt-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--lt-green);
  color: var(--lt-white);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 14px 28px;
  border-radius: 100px;
  text-decoration: none;
  transition: background 0.2s, transform 0.15s;
}
.btn-lt-primary:hover {
  background: var(--lt-blue);
  transform: translateY(-2px);
}
.btn-lt-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--lt-green);
  font-size: 0.9rem;
  font-weight: 400;
  padding: 14px 28px;
  border-radius: 100px;
  text-decoration: none;
  border: 1.5px solid var(--lt-line);
  transition: border-color 0.2s, color 0.2s, transform 0.15s;
}
.btn-lt-ghost:hover {
  border-color: var(--lt-blue);
  color: var(--lt-blue);
  transform: translateY(-2px);
}
section {
  padding: 88px 0;
}
.lt-section-eyebrow {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--lt-blue);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.lt-section-eyebrow::before {
  content: "";
  display: block;
  width: 22px;
  height: 2px;
  background: var(--lt-cyan);
  border-radius: 2px;
}
.lt-section-eyebrow--center {
  justify-content: center;
  color: var(--lt-lime);
}
h2 {
  font-family: "DM Serif Display", serif;
  font-size: clamp(1.7rem, 3.2vw, 2.4rem);
  line-height: 1.2;
  color: var(--lt-green);
  margin-bottom: 16px;
}
.lt-section-lead {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--lt-mid);
  max-width: 560px;
}
#lt-about {
  background: var(--lt-mist);
}
.lt-about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-top: 44px;
}
.lt-about-logo {
  text-align: center;
  padding: 32px;
  background: var(--lt-white);
  border-radius: var(--lt-radius);
  border: 1px solid var(--lt-line);
}
.lt-about-logo img {
  max-width: 280px;
  width: 100%;
  height: auto;
}
.lt-about-text p {
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--lt-mid);
  margin-bottom: 16px;
}
.lt-about-text p:last-child {
  margin-bottom: 0;
}
#lt-missions {
  background: var(--lt-white);
}
.lt-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 22px;
  margin-top: 44px;
}
.lt-card {
  background: var(--lt-mist);
  border-radius: var(--lt-radius);
  padding: 32px 26px;
  border: 1px solid var(--lt-line);
  border-top: 3px solid var(--lt-lime);
  transition: box-shadow 0.2s, transform 0.2s;
}
.lt-card:hover {
  box-shadow: 0 10px 30px rgba(31, 107, 58, 0.08);
  transform: translateY(-3px);
}
.lt-card h3 {
  font-family: "DM Serif Display", serif;
  font-size: 1.1rem;
  color: var(--lt-green);
  margin-bottom: 10px;
}
.lt-card p {
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--lt-mid);
}
#lt-chiffres {
  background: var(--lt-green);
  color: rgba(255, 255, 255, 0.85);
  text-align: center;
}
#lt-chiffres h2 {
  color: var(--lt-white);
}
#lt-chiffres .lt-section-lead {
  color: rgba(255, 255, 255, 0.7);
  margin: 0 auto;
}
.lt-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 32px;
  margin-top: 48px;
}
.lt-stat-num {
  font-family: "DM Serif Display", serif;
  font-size: 2.4rem;
  color: var(--lt-lime);
  line-height: 1;
  margin-bottom: 8px;
}
.lt-stat-label {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.75);
}
#lt-cta {
  background: linear-gradient(135deg, var(--lt-green-dark) 0%, var(--lt-green) 55%, var(--lt-blue) 100%);
  text-align: center;
  padding: 88px 0;
}
#lt-cta h2 {
  color: var(--lt-white);
}
#lt-cta p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 1rem;
  line-height: 1.7;
  max-width: 520px;
  margin: 16px auto 36px;
}
#lt-cta .btn-lt-primary {
  background: var(--lt-lime);
  color: var(--lt-green-dark);
}
#lt-cta .btn-lt-primary:hover {
  background: var(--lt-white);
}
.lt-footer {
  background: var(--lt-green-dark);
  color: rgba(255, 255, 255, 0.45);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 28px 0;
  font-size: 0.82rem;
}
.lt-footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.lt-footer a {
  color: inherit;
  text-decoration: none;
}
.lt-footer a:hover {
  color: rgba(255, 255, 255, 0.75);
}
.lt-footer-links {
  display: inline-flex;
  gap: 14px;
  flex-wrap: wrap;
}
@media (max-width: 991px) {
  .lt-about-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  #lt-hero {
    padding-top: 140px;
  }
}
@media (max-width: 576px) {
  .shell {
    width: min(100% - 32px, var(--lt-shell-max));
  }
  .lt-nav a.cta-nav {
    padding: 8px 16px;
    font-size: 0.78rem;
  }
  .lt-nav-logo img {
    height: 42px;
  }
}