/* ==========================================================================
   DPE3CL — Site vitrine
   Design system : Inter + indigo/vert sur fond clair, mobile-first
   ========================================================================== */

/* ============ DESIGN TOKENS ============ */
:root {
  --color-primary: #4f46e5;
  --color-primary-dark: #4338ca;
  --color-accent: #10b981;
  --color-accent-dark: #059669;
  --color-text: #1f2937;
  --color-text-soft: #4b5563;
  --color-text-muted: #6b7280;
  --color-bg: #ffffff;
  --color-bg-soft: #f9fafb;
  --color-bg-hero: #f3f4f6;
  --color-border: #e5e7eb;
  --color-shadow: rgba(15, 23, 42, 0.08);

  --radius: 10px;
  --radius-lg: 16px;

  --container: 1180px;
  --gap: 24px;
}

/* ============ RESET / BASE ============ */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
:target { scroll-margin-top: 80px; }
body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-dark); }
h1, h2, h3, h4 { font-weight: 700; line-height: 1.2; margin: 0 0 0.5em; color: var(--color-text); }
h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.05rem; }
p { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; padding-left: 1.4em; }
li { margin-bottom: 6px; }

/* ============ LAYOUT ============ */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

/* ============ HEADER / NAV ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(8px);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text);
}
.nav-brand img { width: 36px; height: 36px; border-radius: 6px; }
.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0; padding: 0;
}
.nav-links a {
  color: var(--color-text-soft);
  font-weight: 500;
  font-size: 0.95rem;
}
.nav-links a:hover { color: var(--color-primary); }
.nav-cta {
  background: var(--color-primary);
  color: white !important;
  padding: 9px 18px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  transition: background 0.15s;
}
.nav-cta:hover { background: var(--color-primary-dark); }
.nav-toggle {
  display: none;
  background: none; border: none;
  font-size: 1.5rem; cursor: pointer;
  color: var(--color-text);
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .nav-links.open {
    display: flex; flex-direction: column;
    position: absolute; top: 64px; left: 0; right: 0;
    background: var(--color-bg);
    padding: 20px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 4px 12px var(--color-shadow);
    gap: 16px;
  }
}

/* ============ HERO ============ */
.hero {
  background: linear-gradient(135deg, var(--color-bg-hero) 0%, #ffffff 100%);
  padding: 64px 0 56px;
}
.hero-content {
  max-width: 760px;
  text-align: center;
  margin: 0 auto;
}
.hero h1 {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 0.5em;
}
.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--color-text-soft);
  margin-bottom: 2em;
}
.hero-cta {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ============ BUTTONS ============ */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.15s;
  border: 2px solid transparent;
  cursor: pointer;
}
.btn-primary {
  background: var(--color-primary);
  color: white !important;
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}
.btn-secondary {
  background: white;
  color: var(--color-text) !important;
  border-color: var(--color-border);
}
.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary) !important;
}

/* ============ SECTIONS ============ */
.section { padding: 56px 0 72px; }
.section-soft { background: var(--color-bg-soft); }
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 40px;
}
.section-header h2 { margin-bottom: 0.4em; }
.section-header p { color: var(--color-text-soft); font-size: 1.1rem; }

/* ============ FEATURES GRID ============ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--gap);
}
.feature-card {
  background: white;
  padding: 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: transform 0.15s, box-shadow 0.15s;
  display: block;
  color: inherit;
  text-decoration: none;
}
.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 24px var(--color-shadow);
  color: inherit;
  text-decoration: none;
}
.feature-icon {
  width: 48px; height: 48px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: white;
  margin-bottom: 16px;
}
.feature-card h3 { margin-bottom: 8px; }
.feature-card p { color: var(--color-text-soft); font-size: 0.95rem; margin: 0; }

/* ============ VALUE PROP ============ */
.values {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--gap);
}
.value-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}
.value-icon {
  flex-shrink: 0;
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--color-accent);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
}
.value-item h3 { margin: 0 0 4px; font-size: 1.05rem; }
.value-item p { margin: 0; color: var(--color-text-soft); font-size: 0.92rem; }

/* ============ FINAL CTA ============ */
.final-cta {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  color: white;
  text-align: center;
  padding: 64px 20px;
}
.final-cta h2 { color: white; }
.final-cta p { font-size: 1.1rem; opacity: 0.95; margin-bottom: 2em; }
.final-cta .btn-primary {
  background: white;
  color: var(--color-primary) !important;
}
.final-cta .btn-primary:hover {
  background: var(--color-bg-soft);
}

/* ============ ARTICLE / PAGE TEXT ============ */
.article {
  max-width: 800px;
  margin: 0 auto;
}
.article h2 { margin-top: 1.5em; }
.article h3 { margin-top: 1.4em; color: var(--color-primary); }
.article ul li, .article ol li { margin-bottom: 4px; }
.article blockquote {
  margin: 1.5em 0;
  padding: 16px 22px;
  border-left: 4px solid var(--color-primary);
  background: var(--color-bg-soft);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--color-text-soft);
  font-style: italic;
}
.article table {
  width: 100%;
  border-collapse: collapse;
  margin: 1em 0;
}
.article th, .article td {
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  text-align: left;
}
.article th {
  background: var(--color-bg-soft);
  font-weight: 600;
}

/* ============ FOOTER ============ */
.site-footer {
  background: #1f2937;
  color: #d1d5db;
  padding: 56px 0 28px;
  font-size: 0.92rem;
}
.footer-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 36px;
  margin-bottom: 36px;
}
.footer-cols h4 { color: white; margin: 0 0 12px; font-size: 1rem; }
.footer-cols ul { list-style: none; padding: 0; margin: 0; }
.footer-cols li { margin-bottom: 8px; }
.footer-cols a { color: #d1d5db; }
.footer-cols a:hover { color: white; }
.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid #374151;
  text-align: center;
  color: #9ca3af;
  font-size: 0.85rem;
}