:root {
  --color-primary: #16a34a;
  --color-primary-dark: #15803d;
  --color-primary-light: #4ade80;
  --color-secondary: #f59e0b;
  --color-bg: #ffffff;
  --color-bg-secondary: #f7fdf9;
  --color-text: #1e293b;
  --color-text-secondary: #64748b;
  --color-border: #e2e8f0;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --radius: 0.5rem;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
  --max-width: 1120px;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ---- Nav ---- */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.nav-links a {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
}

.nav-links a:hover {
  color: var(--color-text);
  text-decoration: none;
}

/* ---- Buttons ---- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.875rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.15s, border-color 0.15s;
  text-decoration: none;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-bg-secondary);
}

.btn-large {
  padding: 0.875rem 2rem;
  font-size: 1rem;
}

/* ---- Section ---- */

section {
  padding: 5rem 1.5rem;
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 0.75rem;
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0 auto 3rem;
}

/* ---- Hero ---- */

.hero {
  padding: 8rem 1.5rem 5rem;
  text-align: center;
  background: linear-gradient(180deg, var(--color-bg-secondary) 0%, var(--color-bg) 100%);
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.hero h1 span {
  color: var(--color-primary);
}

.hero p {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 540px;
  margin: 0 auto 2rem;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---- Features ---- */

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.feature-card {
  padding: 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  transition: box-shadow 0.2s;
}

.feature-card:hover {
  box-shadow: var(--shadow-md);
}

.feature-icon {
  width: 2.5rem;
  height: 2.5rem;
  background: var(--color-bg-secondary);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  font-size: 1.25rem;
}

.feature-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.feature-card p {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

/* ---- Pricing ---- */

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

.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  align-items: start;
}

.pricing-card {
  padding: 2rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
}

.pricing-card.featured {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary);
  position: relative;
}

.pricing-card.featured::before {
  content: 'Populaire';
  position: absolute;
  top: -0.75rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.125rem 0.75rem;
  border-radius: 999px;
}

.pricing-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.pricing-card .price {
  font-size: 2.5rem;
  font-weight: 800;
  margin: 1rem 0 0.25rem;
}

.pricing-card .price span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-text-secondary);
}

.pricing-card .price-note {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
}

.pricing-card ul {
  list-style: none;
  margin-bottom: 2rem;
}

.pricing-card li {
  padding: 0.375rem 0;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.pricing-card li::before {
  content: '\2713';
  color: var(--color-primary);
  font-weight: 700;
  margin-right: 0.5rem;
}

.pricing-card .btn {
  width: 100%;
}

/* ---- CTA ---- */

.cta {
  text-align: center;
}

.cta h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.cta p {
  color: var(--color-text-secondary);
  max-width: 480px;
  margin: 0 auto 2rem;
}

/* ---- Footer ---- */

.footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 1.5rem;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

/* ---- Responsive ---- */

@media (min-width: 640px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .hero h1 {
    font-size: 3.5rem;
  }

  .features-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .section-title {
    font-size: 2.5rem;
  }
}