:root {
  --burgundy-900: #4d1022;
  --burgundy-800: #65162d;
  --burgundy-700: #7c1c39;
  --cream-050: #fcf5eb;
  --cream-100: #f3e6d7;
  --slate-700: #525a67;
  --slate-900: #2f343d;
  --rose-gold-500: #b76e79;
  --rose-gold-400: #cc8b94;
  --white: #ffffff;
  --shadow-soft: 0 14px 35px rgba(34, 18, 27, 0.12);
  --radius-md: 0.75rem;
  --radius-lg: 1.1rem;
  --container: 1120px;
  --header-height: 4.5rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Avenir Next", "Segoe UI Variable", "Trebuchet MS", sans-serif;
  background: radial-gradient(circle at 20% 0%, #fffaf2 0%, var(--cream-050) 45%, #f5e7d8 100%);
  color: var(--slate-900);
  line-height: 1.6;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Utilitaires de section */
.section {
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
  padding: 4.25rem 0;
}

.section-heading {
  max-width: 48rem;
  margin-bottom: 1.8rem;
}

.eyebrow {
  margin: 0 0 0.4rem;
  color: var(--rose-gold-500);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  font-size: 0.76rem;
}

h1,
h2,
h3 {
  margin: 0 0 0.75rem;
  line-height: 1.15;
  color: var(--burgundy-900);
}

h1 {
  font-size: clamp(1.9rem, 5vw, 3.3rem);
}

h2 {
  font-size: clamp(1.45rem, 3.8vw, 2.3rem);
}

h3 {
  font-size: clamp(1.1rem, 2.6vw, 1.35rem);
}

p {
  margin: 0;
}

/* Bandeau de démonstration */
.demo-banner {
  margin: 0;
  text-align: center;
  background: var(--burgundy-900);
  color: var(--cream-050);
  padding: 0.62rem 1rem;
  font-size: 0.88rem;
  letter-spacing: 0.02em;
}

/* Styles Header / Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 25;
  background: rgba(252, 245, 235, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(124, 28, 57, 0.14);
}

.nav-shell {
  width: min(100% - 2rem, var(--container));
  min-height: var(--header-height);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  font-weight: 800;
  color: var(--burgundy-800);
  letter-spacing: 0.01em;
}

.nav-toggle {
  border: 1px solid rgba(77, 16, 34, 0.26);
  background: var(--white);
  border-radius: 999px;
  padding: 0.45rem 0.9rem;
  color: var(--burgundy-900);
  font-weight: 600;
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0.85rem 0;
  display: none;
  position: absolute;
  left: 1rem;
  right: 1rem;
  top: calc(var(--header-height) - 0.35rem);
  background: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(183, 110, 121, 0.25);
}

.nav-list li {
  padding: 0.45rem 1rem;
}

.nav-list a {
  color: var(--slate-900);
  font-weight: 600;
}

.nav-list.is-open {
  display: block;
}

.nav-cta {
  color: var(--burgundy-800);
}

/* Styles Hero */
.hero {
  padding-top: 3.25rem;
  display: grid;
  gap: 1.3rem;
}

.hero-content {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(101, 22, 45, 0.15);
}

.hero-subtitle {
  color: var(--slate-700);
  margin-top: 1rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.4rem;
}

.hero-trust {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--slate-700);
}

.hero-panel {
  background: linear-gradient(165deg, var(--burgundy-800), var(--burgundy-900));
  color: var(--cream-050);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-soft);
}

.hero-panel h2 {
  color: var(--cream-050);
  font-size: 1.2rem;
}

.hero-panel ul {
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1rem;
}

.hero-panel li {
  display: grid;
  gap: 0.15rem;
}

.hero-panel strong {
  font-size: 1.5rem;
  color: var(--rose-gold-400);
}

/* Styles CTA */
.btn {
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.76rem 1.25rem;
  font-weight: 700;
  font-size: 0.95rem;
  transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease, color 180ms ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--rose-gold-500);
  color: var(--white);
  box-shadow: 0 10px 22px rgba(183, 110, 121, 0.28);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--rose-gold-400);
}

.btn-secondary {
  border-color: rgba(101, 22, 45, 0.28);
  color: var(--burgundy-800);
  background: rgba(255, 255, 255, 0.75);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  background: rgba(204, 139, 148, 0.16);
}

/* Styles présentation */
.presentation .grid-cards {
  display: grid;
  gap: 0.95rem;
}

.card {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(124, 28, 57, 0.14);
  border-radius: var(--radius-md);
  padding: 1.1rem;
}

.card p {
  color: var(--slate-700);
}

/* Styles preuve sociale */
.social-proof {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.75), rgba(249, 235, 220, 0.64));
  border-radius: var(--radius-lg);
  border: 1px solid rgba(101, 22, 45, 0.12);
  padding-inline: 1rem;
}

.logo-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.7rem;
  margin: 1.5rem 0;
}

.logo-row img {
  width: 100%;
  border: 1px solid rgba(101, 22, 45, 0.1);
  border-radius: 0.85rem;
  background: var(--white);
  padding: 0.8rem;
  min-height: 4.8rem;
}

.metric-grid {
  display: grid;
  gap: 0.85rem;
}

.metric {
  border-radius: var(--radius-md);
  background: var(--white);
  border: 1px solid rgba(124, 28, 57, 0.15);
  padding: 1rem;
}

.metric .value {
  font-weight: 800;
  font-size: 1.55rem;
  color: var(--burgundy-800);
}

.metric .label {
  color: var(--slate-700);
}

.testimonial-grid {
  margin-top: 1.2rem;
  display: grid;
  gap: 0.9rem;
}

.testimonial {
  background: var(--white);
  border: 1px solid rgba(124, 28, 57, 0.12);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.testimonial img {
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  margin-bottom: 0.8rem;
}

.testimonial blockquote {
  margin: 0 0 0.8rem;
  font-weight: 600;
  color: var(--slate-900);
}

.testimonial .author {
  font-size: 0.9rem;
  color: var(--slate-700);
}

/* Styles qualification */
.qualification-layout {
  display: grid;
  gap: 1rem;
}

.check-list {
  padding-left: 1.2rem;
  margin: 0;
  color: var(--slate-900);
}

.check-list li + li {
  margin-top: 0.55rem;
}

.qualification-note {
  border: 1px solid rgba(183, 110, 121, 0.32);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.82);
  padding: 1rem;
  color: var(--slate-700);
}

.qualification-note p + p {
  margin-top: 0.55rem;
}

.tag {
  display: inline-block;
  margin-top: 0.6rem;
  color: var(--burgundy-800);
  font-weight: 700;
}

/* Styles formulaire et CTA final */
.final-cta {
  background: linear-gradient(135deg, var(--burgundy-800), var(--burgundy-900));
  border-radius: var(--radius-lg);
  color: var(--cream-050);
  border: 1px solid rgba(183, 110, 121, 0.35);
  padding-inline: 1rem;
}

.final-cta h2,
.final-cta p {
  color: var(--cream-050);
}

.registration-form {
  margin-top: 1.2rem;
  display: grid;
  gap: 0.9rem;
}

.field {
  display: grid;
  gap: 0.35rem;
}

.field label {
  font-weight: 600;
}

.field input,
.field select {
  border-radius: 0.7rem;
  border: 1px solid rgba(252, 245, 235, 0.3);
  padding: 0.72rem 0.85rem;
  background: rgba(255, 255, 255, 0.97);
  color: var(--slate-900);
  font: inherit;
}

.field input:focus-visible,
.field select:focus-visible {
  outline: 2px solid rgba(204, 139, 148, 0.55);
  outline-offset: 1px;
}

.checkbox-field {
  grid-template-columns: auto 1fr;
  align-items: start;
  column-gap: 0.55rem;
}

.checkbox-field label {
  font-weight: 500;
}

.error-message {
  color: #ffd4da;
  min-height: 1rem;
  font-size: 0.82rem;
}

.field.is-invalid input,
.field.is-invalid select {
  border-color: #ff8698;
}

.form-feedback {
  min-height: 1.3rem;
  font-size: 0.9rem;
  font-weight: 600;
}

.form-feedback.is-success {
  color: #b9f7d6;
}

.form-feedback.is-error {
  color: #ffd4da;
}

/* Footer */
.site-footer {
  text-align: center;
  padding: 1.3rem 1rem 2rem;
  color: var(--slate-700);
  font-size: 0.92rem;
}

/* Animations de révélation */
.section-reveal {
  opacity: 1;
  transform: translateY(0);
}

.js .section-reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 420ms ease, transform 420ms ease;
}

.js .section-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (min-width: 760px) {
  .hero {
    grid-template-columns: 1.4fr 1fr;
    align-items: stretch;
  }

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

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

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

  .qualification-layout {
    grid-template-columns: 1.2fr 1fr;
  }

  .registration-form {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .registration-form .checkbox-field,
  .registration-form button,
  .registration-form .form-feedback {
    grid-column: 1 / -1;
  }
}

@media (min-width: 920px) {
  .nav-toggle {
    display: none;
  }

  .nav-list {
    display: flex;
    position: static;
    background: transparent;
    border: 0;
    box-shadow: none;
    gap: 1rem;
    align-items: center;
    padding: 0;
  }

  .nav-list li {
    padding: 0;
  }

  .nav-list a {
    padding: 0.35rem 0.35rem;
  }

  .nav-cta {
    border: 1px solid rgba(101, 22, 45, 0.26);
    border-radius: 999px;
    padding: 0.4rem 0.9rem !important;
    background: rgba(255, 255, 255, 0.78);
  }

  .social-proof,
  .final-cta {
    padding-inline: 2rem;
  }
}