:root {
  --ink: #1b2430;
  --ink-soft: #4a5568;
  --paper: #ffffff;
  --paper-soft: #f5f7fa;
  --accent: #1d6f66;
  --accent-dark: #14504a;
  --border: #e2e6ea;
  --radius: 10px;
  --max-width: 1080px;
}

* { 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(--ink);
  background: var(--paper);
  line-height: 1.6;
}

img { max-width: 100%; }

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.wrap-narrow { max-width: 640px; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: 0.75rem 1rem;
  z-index: 100;
}
.skip-link:focus { left: 0; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--paper);
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  padding-bottom: 1rem;
}

.brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--ink);
  text-decoration: none;
}

.site-nav {
  display: flex;
  gap: 1.5rem;
}

.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.95rem;
}

.site-nav a:hover { color: var(--accent); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}
.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--ink);
}

/* Hero */
.hero {
  padding: 5rem 0 3rem;
  text-align: center;
}
.hero h1 {
  font-size: 2.5rem;
  margin: 0 0 0.25rem;
}
.tagline {
  color: var(--accent);
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0 0 1.5rem;
}
.lead {
  max-width: 620px;
  margin: 0 auto;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

/* Sections */
.section { padding: 3.5rem 0; }
.section h2 {
  font-size: 1.6rem;
  margin-bottom: 0.5rem;
}
.section-intro {
  color: var(--ink-soft);
  margin-bottom: 2rem;
}

.apps { background: var(--paper-soft); }

.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.25rem;
}

.app-card {
  display: block;
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-decoration: none;
  color: var(--ink);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.app-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0,0,0,0.06);
}
.app-card h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
}
.app-card p {
  margin: 0 0 0.75rem;
  color: var(--ink-soft);
  font-size: 0.92rem;
}
.app-link {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.9rem;
}

.about p { color: var(--ink-soft); max-width: 700px; }

.cta {
  text-align: center;
  background: var(--accent);
  color: #fff;
}
.cta h2, .cta p { color: #fff; }
.cta .btn {
  background: #fff;
  color: var(--accent-dark);
}

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}
.btn:hover { background: var(--accent-dark); }

/* Formulaire */
.contact-form { margin-top: 1.5rem; }
.field { margin-bottom: 1.1rem; }
.field label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.35rem;
  font-size: 0.92rem;
}
.field input,
.field textarea {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 1rem;
  font-family: inherit;
}
.field input:focus,
.field textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}
.hp-field {
  position: absolute;
  left: -9999px;
  top: -9999px;
}
.contact-alt {
  margin-top: 1.5rem;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.alert {
  padding: 0.9rem 1.1rem;
  border-radius: var(--radius);
  margin-bottom: 1.25rem;
  font-size: 0.95rem;
}
.alert-success { background: #e5f5f0; color: #14503f; }
.alert-error { background: #fbeaea; color: #7a2020; }
.alert ul { margin: 0; padding-left: 1.2rem; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--paper-soft);
  padding: 2.5rem 0;
  margin-top: 2rem;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  align-items: center;
  justify-content: space-between;
}
.footer-info p { margin: 0.2rem 0; color: var(--ink-soft); font-size: 0.92rem; }
.footer-info a { color: var(--ink-soft); }

.social-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.92rem;
}
.social-link:hover { color: #1877f2; }

.footer-links { display: flex; gap: 1.25rem; }
.footer-links a { color: var(--ink-soft); text-decoration: none; font-size: 0.88rem; }
.footer-links a:hover { color: var(--accent); }

.footer-copy {
  width: 100%;
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.82rem;
  margin: 1rem 0 0;
}

/* Responsive */
@media (max-width: 700px) {
  .nav-toggle { display: flex; }
  .site-nav {
    display: none;
    flex-direction: column;
    width: 100%;
    padding-bottom: 1rem;
  }
  .site-nav.open { display: flex; }
  .header-inner { flex-wrap: wrap; }
  .hero h1 { font-size: 2rem; }
}