/* Landing Blueprint Modular — style type Streamlit (poli, lisible, moderne) */
:root {
  --bg: #fafbfc;
  --bg-hero: #ffffff;
  --bg-card: #ffffff;
  --bg-code: #0d1117;
  --fg: #1a1f2e;
  --muted: #57606a;
  --bleu-profond: #1A4B8F;
  --bleu-cyan: #00A3E0;
  --vert-menthe: #2da44e;
  --accent: var(--bleu-cyan);
  --border: #e6e9ef;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
  --radius: 8px;
  --radius-btn: 6px;
  --font-sans: "DM Sans", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* Header — sticky, léger fond + bordure */
.landing-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.875rem 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
  flex-wrap: wrap;
  gap: 1rem;
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.landing-header .brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--fg);
  text-decoration: none;
}
.landing-header .brand-logo {
  height: 36px;
  width: auto;
  max-width: 100px;
  object-fit: contain;
}
.landing-header .word-blueprint { color: var(--bleu-profond); }
.landing-header .word-modular { color: var(--bleu-cyan); }
.landing-nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.landing-nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
}
.landing-nav-links a:hover { color: var(--accent); }
.landing-nav-links .btn-doc {
  background: var(--bleu-profond);
  color: #fff !important;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-btn);
  font-weight: 600;
}
.landing-nav-links .btn-doc:hover { opacity: 0.92; }

/* Main — largeur confortable, padding généreux */
.landing-main {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}

/* Hero — fond blanc doux, titre fort, boutons marqués */
.hero {
  padding: 3.5rem 0 4rem;
  text-align: left;
}
.hero-kicker {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--bleu-cyan);
  margin-bottom: 0.75rem;
}
.hero-title {
  font-family: var(--font-sans);
  font-size: clamp(2.25rem, 5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--fg);
  margin-bottom: 1rem;
}
.hero-desc {
  font-size: 1.15rem;
  color: var(--muted);
  margin-bottom: 1.75rem;
  max-width: 560px;
  line-height: 1.65;
}
.hero-desc code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--border);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  color: var(--bleu-profond);
}
.hero-actions {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}
.btn-primary {
  display: inline-block;
  padding: 0.7rem 1.4rem;
  background: var(--bleu-profond);
  color: #fff;
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
  transition: opacity 0.15s, box-shadow 0.15s;
}
.btn-primary:hover {
  opacity: 0.92;
  color: #fff;
  box-shadow: var(--shadow-md);
}
.btn-secondary {
  display: inline-block;
  padding: 0.7rem 1.4rem;
  border: 1px solid var(--border);
  color: var(--fg);
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  background: var(--bg-card);
  transition: border-color 0.15s, color 0.15s;
}
.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Bloc code — style terminal / Streamlit */
.hero-code-wrap {
  max-width: 480px;
}
.hero-code-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 0.5rem;
}
.hero-code {
  background: var(--bg-code);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  box-shadow: var(--shadow-sm);
}
.hero-code pre { margin: 0; overflow-x: auto; }
.hero-code code {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: #e6edf3;
}

/* Section Pourquoi — cartes avec bordure gauche */
.section-pitch {
  padding: 3rem 0;
  border-top: 1px solid var(--border);
}
.section-heading {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 1.5rem;
}
.pitch-list {
  list-style: none;
}
.pitch-list li {
  padding: 1rem 1.25rem;
  padding-left: 1.35rem;
  border-left: 4px solid var(--bleu-cyan);
  margin-bottom: 0.75rem;
  background: var(--bg-card);
  border-radius: 0 var(--radius) var(--radius) 0;
  box-shadow: var(--shadow-sm);
}
.pitch-list li:last-child { margin-bottom: 0; }
.pitch-list code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--border);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
}

/* Ce que BPM apporte (différenciateurs) */
.section-differentiators {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border);
}
.section-intro {
  color: var(--muted);
  margin-bottom: 1.25rem;
  max-width: 640px;
}
.diff-list {
  list-style: none;
  margin-bottom: 1.25rem;
}
.diff-list li {
  padding: 0.75rem 0;
  padding-left: 1rem;
  border-left: 3px solid var(--bleu-cyan);
  margin-bottom: 0.5rem;
  background: var(--bg-card);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 0.75rem 1rem 0.75rem 1rem;
  box-shadow: var(--shadow-sm);
}
.diff-list li:last-child { margin-bottom: 0; }
.diff-list code { font-family: var(--font-mono); font-size: 0.88em; background: var(--border); padding: 0.1rem 0.35rem; border-radius: 4px; }

/* Idéal pour — pills */
.section-use {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border);
}
.use-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.use-tags span {
  display: inline-block;
  padding: 0.45rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.875rem;
  color: var(--muted);
  transition: border-color 0.15s, color 0.15s;
}
.use-tags span:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* CTA final — bande légère */
.section-cta {
  padding: 3rem 0;
  text-align: center;
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(26,75,143,0.03) 0%, transparent 100%);
  border-radius: 0 0 var(--radius) var(--radius);
  margin: 0 -1.5rem;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}
.cta-text {
  font-size: 1rem;
  color: var(--muted);
  margin-bottom: 1rem;
}
.btn-cta {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background: var(--bleu-profond);
  color: #fff;
  border-radius: var(--radius-btn);
  font-weight: 600;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
}
.btn-cta:hover { opacity: 0.92; color: #fff; box-shadow: var(--shadow-md); }

/* Footer */
.landing-footer {
  padding: 1.5rem 1.5rem;
  text-align: center;
  font-size: 0.875rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
}
.landing-footer a {
  color: var(--accent);
  text-decoration: none;
}
.landing-footer a:hover { text-decoration: underline; }
.footer-dot { margin: 0 0.25rem; }

@media (max-width: 640px) {
  .landing-header { padding: 0.75rem 1rem; flex-direction: column; align-items: flex-start; }
  .landing-main { padding: 0 1rem 3rem; }
  .hero { padding: 2.5rem 0 3rem; }
  .hero-title { font-size: clamp(1.85rem, 8vw, 2.5rem); }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .section-cta { margin: 0 -1rem; padding-left: 1rem; padding-right: 1rem; }
}