/* Config3D — Design system (fond blanc, typographie fine, densité faible)
   Règle : 1 idée par bloc, 1 seule couleur d'accent, graisses 400/500/600 uniquement. */

:root {
  --cfg-bg: #FFFFFF;
  --cfg-bg-subtle: #FAFAFB;
  --cfg-bg-muted: #F4F4F5;
  --cfg-border: #E8E8EC;
  --cfg-border-strong: #D4D4D8;
  --cfg-text-main: #0F172A;
  --cfg-text-muted: #475569;
  --cfg-text-subtle: #64748B;
  --cfg-text-faint: #94A3B8;
  --cfg-primary: #2563EB;
  --cfg-primary-hover: #1D4ED8;
  --cfg-primary-soft: #EFF4FF;
  --font: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --radius: 10px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 24px 60px -24px rgba(15, 23, 42, 0.18), 0 2px 6px rgba(15, 23, 42, 0.04);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--cfg-bg);
  color: var(--cfg-text-main);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  font-feature-settings: "cv11", "ss01";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
h1, h2, h3, p { margin: 0; }
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; color: inherit; }
.tnum { font-variant-numeric: tabular-nums; }
.muted { color: var(--cfg-text-subtle); }
.center { text-align: center; }

/* Boutons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 38px; padding: 0 16px;
  border-radius: 8px; border: 1px solid transparent;
  font-size: 14px; font-weight: 500; line-height: 1; white-space: nowrap;
  cursor: pointer; transition: background .15s, border-color .15s, color .15s;
}
.btn-sm { height: 34px; padding: 0 14px; font-size: 13.5px; }
.btn-xs { height: 28px; padding: 0 11px; font-size: 12.5px; border-radius: 6px; }
.btn-block { width: 100%; }
.btn-primary { background: var(--cfg-primary); color: #fff; }
.btn-primary:hover { background: var(--cfg-primary-hover); }
.btn-secondary { background: #fff; color: var(--cfg-text-main); border-color: var(--cfg-border); box-shadow: var(--shadow-sm); }
.btn-secondary:hover { border-color: var(--cfg-border-strong); }
.btn:focus-visible, .stage-arrow:focus-visible, .tool:focus-visible { outline: 2px solid var(--cfg-primary); outline-offset: 2px; }

/* Barre d'annonce */
.announce {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  padding: 8px 16px;
  background: var(--cfg-bg-subtle); border-bottom: 1px solid var(--cfg-border);
  font-size: 13px; color: var(--cfg-text-muted);
  text-align: center; flex-wrap: wrap;
}
.announce-tag {
  padding: 2px 8px; border-radius: 999px;
  background: var(--cfg-text-main); color: #fff;
  font-size: 11.5px; font-weight: 500;
}
.announce a { color: var(--cfg-primary); font-weight: 500; }

/* Navigation */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s;
}
.nav.is-scrolled { border-bottom-color: var(--cfg-border); }
.nav-inner {
  max-width: 1120px; margin: 0 auto; height: 60px; padding: 0 24px;
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: center;
}
.logo { display: inline-flex; align-items: center; gap: 8px; font-weight: 600; font-size: 15.5px; letter-spacing: -0.02em; }
.logo svg { color: var(--cfg-primary); }
.nav-links { display: flex; gap: 30px; font-size: 14px; color: var(--cfg-text-muted); }
.nav-links a:hover { color: var(--cfg-text-main); }
.nav .btn { justify-self: end; }

/* Hero */
.hero { padding: 52px 24px 40px; text-align: center; }
.trust-pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 5px 12px 5px 8px; margin-bottom: 22px;
  border: 1px solid var(--cfg-border); border-radius: 999px;
  font-size: 13px; color: var(--cfg-text-muted); background: #fff;
  box-shadow: var(--shadow-sm);
}
.trust-pill:hover { border-color: var(--cfg-border-strong); }
.trust-stars {
  display: inline-grid; place-items: center; width: 20px; height: 20px;
  border-radius: 999px; background: #FEF3C7; color: #D97706;
}
.hero-title {
  font-size: clamp(34px, 4.6vw, 56px);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -0.04em;
  max-width: 900px; margin: 0 auto;
}
.hero-sub {
  max-width: 620px; margin: 18px auto 0;
  font-size: 16.5px; line-height: 1.6; color: var(--cfg-text-subtle);
}
.hero-sub strong { color: var(--cfg-text-main); font-weight: 500; }
.hero-ctas { display: flex; justify-content: center; gap: 10px; margin-top: 26px; flex-wrap: wrap; }

/* Preuves */
.proof { margin: 72px auto 0; max-width: 960px; }
.proof-title { font-size: 13.5px; color: var(--cfg-text-subtle); margin-bottom: 22px; }
.proof-row { display: flex; justify-content: center; gap: 56px; flex-wrap: wrap; }
.proof-item { display: flex; flex-direction: column; align-items: center; gap: 2px; opacity: .78; transition: opacity .15s; }
.proof-item:hover { opacity: 1; }
.proof-name { font-size: 19px; font-weight: 600; letter-spacing: -0.03em; color: #52525B; }
.proof-meta { font-size: 12.5px; color: var(--cfg-text-faint); }

/* Sections */
.section { padding: 112px 24px; }
.section-subtle { background: var(--cfg-bg-subtle); border-top: 1px solid var(--cfg-border); border-bottom: 1px solid var(--cfg-border); }
.container { max-width: 1080px; margin: 0 auto; }
.container-narrow { max-width: 760px; }
.eyebrow { font-size: 13.5px; font-weight: 500; color: var(--cfg-primary); margin-bottom: 12px; }
.h2 { font-size: clamp(28px, 3.6vw, 40px); font-weight: 500; line-height: 1.15; letter-spacing: -0.035em; }
.lead { margin-top: 16px; font-size: 16.5px; color: var(--cfg-text-subtle); }

.pillars { display: grid; grid-template-columns: repeat(3, 1fr); gap: 48px; margin-top: 56px; }
.pillar-ico { color: var(--cfg-text-main); margin-bottom: 18px; }
.pillar h3 { font-size: 16px; font-weight: 600; letter-spacing: -0.01em; margin-bottom: 8px; }
.pillar p { font-size: 15px; color: var(--cfg-text-subtle); }

.compare { margin-top: 40px; background: #fff; border: 1px solid var(--cfg-border); border-radius: 12px; overflow: hidden; }
.compare-row {
  display: grid; grid-template-columns: 1.2fr 1fr 1fr;
  padding: 15px 22px; font-size: 14.5px; color: var(--cfg-text-subtle);
  border-top: 1px solid var(--cfg-border);
}
.compare-row > span:first-child { color: var(--cfg-text-main); }
.compare-row > span:last-child { color: var(--cfg-text-main); font-weight: 500; }
.compare-head { border-top: 0; background: var(--cfg-bg-subtle); font-size: 13px; padding-top: 12px; padding-bottom: 12px; }
.compare-head > span:last-child { color: var(--cfg-primary); }

.split { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 80px; align-items: start; }
.steps { list-style: none; padding: 0; margin: 40px 0 0; display: grid; gap: 28px; }
.steps li { display: flex; gap: 16px; }
.step-n {
  flex: none; width: 28px; height: 28px; border-radius: 999px;
  display: grid; place-items: center;
  border: 1px solid var(--cfg-border-strong); font-size: 13px; font-weight: 500;
}
.steps h3 { font-size: 15.5px; font-weight: 600; margin-bottom: 2px; }
.steps p { font-size: 14.5px; color: var(--cfg-text-subtle); }

.price-card { border: 1px solid var(--cfg-border); border-radius: 14px; padding: 32px; box-shadow: var(--shadow-lg); background: #fff; }
.price-card-k { font-size: 14px; color: var(--cfg-text-subtle); }
.price-card-v { font-size: 36px; font-weight: 500; letter-spacing: -0.04em; margin-top: 6px; }
.price-card-v span { font-size: 15px; color: var(--cfg-text-subtle); letter-spacing: 0; }
.price-card-sub { font-size: 14px; color: var(--cfg-text-subtle); margin-top: 4px; }
.checks { list-style: none; padding: 0; margin: 26px 0; display: grid; gap: 10px; font-size: 14.5px; }
.checks li { display: flex; gap: 10px; align-items: center; }
.checks li::before {
  content: ""; flex: none; width: 16px; height: 16px;
  background: no-repeat center/16px url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232563EB' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E");
}
.price-card-opt { font-size: 13px; color: var(--cfg-text-subtle); padding-top: 18px; margin-bottom: 20px; border-top: 1px solid var(--cfg-border); }

.demo-form { display: flex; gap: 8px; max-width: 620px; margin: 32px auto 0; }
.demo-form input {
  flex: 1; min-width: 0; height: 40px; padding: 0 14px;
  border: 1px solid var(--cfg-border); border-radius: 8px; background: #fff;
  font-size: 14px; transition: border-color .15s, box-shadow .15s;
}
.demo-form input:focus { outline: none; border-color: var(--cfg-primary); box-shadow: 0 0 0 3px var(--cfg-primary-soft); }
.demo-form input[aria-invalid="true"] { border-color: #DC2626; }
.demo-form .btn { height: 40px; }
.form-note { margin-top: 14px; font-size: 13px; color: var(--cfg-text-faint); }

.footer { padding: 28px 24px; font-size: 13px; color: var(--cfg-text-subtle); }
.footer-inner { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer a:hover { color: var(--cfg-text-main); }

@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-inner { grid-template-columns: 1fr auto; }
  .pillars { grid-template-columns: 1fr; gap: 36px; }
  .split { grid-template-columns: 1fr; gap: 48px; }
  .section { padding: 80px 20px; }
}
@media (max-width: 600px) {
  .hide-sm { display: none; }
  .hero { padding: 44px 16px 32px; }
  .announce { font-size: 12px; }
  .announce span:not(.announce-tag) { display: none; }
  .demo-form { flex-direction: column; }
  .proof-row { gap: 24px; }
  .compare-row { grid-template-columns: 1fr 1fr 1fr; padding: 13px 14px; font-size: 13px; gap: 8px; }
  .section { padding: 64px 16px; }
}