/* ============================================================
   VITREX — styles.css
   Site vitrine SaaS — logi-vitrex.be
   Charte officielle : palette bleu turquoise + Arial
   ============================================================ */

/* ---------- 1. Variables CSS (charte officielle) ---------- */
:root {
  /* Palette principale */
  --vitrex-dark-blue: #005f73;
  --vitrex-hover: #006b85;
  --vitrex-principal: #0085a3;
  --vitrex-info: #17a2b8;
  --vitrex-accordeon: #90cdd9;
  --vitrex-blue: #b8e0e8;
  --vitrex-light-blue: #e6f3f8;
  --vitrex-input-bg: #e6f7fa;

  /* État sémantique */
  --couleur-succes: #28a745;
  --couleur-danger: #dc3545;
  --couleur-warning: #ffc107;

  /* Neutres */
  --couleur-fond: #f8f9fa;
  --couleur-bordure: #dee2e6;
  --couleur-texte: #333;
  --couleur-texte-secondaire: #495057;
  --couleur-texte-tertiaire: #64748b;
  --couleur-secondaire: #6c757d;

  /* Layout */
  --largeur-max: 1280px;
  --border-radius: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  --transition: all 0.2s ease;

  /* Ombres */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-blue: 0 2px 8px rgba(0, 95, 115, 0.12);
  --shadow-blue-hover: 0 4px 16px rgba(0, 95, 115, 0.2);
}

/* ---------- 2. Reset + base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: var(--couleur-texte);
  background: #fff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a { color: var(--vitrex-principal); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--vitrex-hover); }

ul { list-style: none; }

/* ---------- 3. Typographie ---------- */
h1, h2, h3, h4, h5, h6 {
  font-family: Arial, Helvetica, sans-serif;
  font-weight: 700;
  line-height: 1.2;
  color: var(--vitrex-dark-blue);
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2rem, 4.5vw, 3.2rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); margin-bottom: 1rem; }
h3 { font-size: 1.2rem; margin-bottom: 0.6rem; }

p { margin-bottom: 1rem; color: var(--couleur-texte-secondaire); }

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--vitrex-principal);
  margin-bottom: 0.8rem;
}

.lead {
  font-size: 1.15rem;
  color: var(--couleur-texte-secondaire);
  max-width: 720px;
  line-height: 1.6;
}

.divider {
  width: 48px;
  height: 3px;
  background: var(--vitrex-principal);
  margin: 0.6rem 0 1.4rem;
  border-radius: 2px;
}
.divider.center { margin-left: auto; margin-right: auto; }

/* ---------- 4. Layout ---------- */
.container {
  max-width: var(--largeur-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

section { padding: 4.5rem 0; }
section.section--tight { padding: 3rem 0; }

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 3rem;
}
.section-header .eyebrow { margin-bottom: 0.6rem; }
.section-header .divider { margin-left: auto; margin-right: auto; }
.section-header p { margin-top: 1rem; }

.bg-light { background: var(--couleur-fond); }
.bg-blue-light { background: var(--vitrex-light-blue); }

/* ---------- 5. Header / Navigation ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--couleur-bordure);
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 0.85rem;
  padding-bottom: 0.85rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--vitrex-dark-blue);
  letter-spacing: 0.02em;
}
.brand:hover { color: var(--vitrex-dark-blue); }

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--vitrex-principal), var(--vitrex-dark-blue));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
}

.nav-main {
  display: flex;
  align-items: center;
  gap: 1.8rem;
}
.nav-main a {
  color: var(--couleur-texte);
  font-size: 0.92rem;
  font-weight: 500;
  position: relative;
  padding: 0.3rem 0;
}
.nav-main a:hover { color: var(--vitrex-principal); }
.nav-main a.active {
  color: var(--vitrex-principal);
}
.nav-main a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--vitrex-principal);
  border-radius: 1px;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  color: var(--vitrex-dark-blue);
}

/* ---------- 6. Boutons ---------- */
.btn {
  display: inline-block;
  padding: 0.75rem 1.6rem;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--border-radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  text-align: center;
  transition: var(--transition);
  text-decoration: none;
  line-height: 1.2;
}

.btn--primary {
  background: var(--vitrex-principal);
  color: #fff;
  box-shadow: var(--shadow-blue);
}
.btn--primary:hover {
  background: var(--vitrex-hover);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-blue-hover);
}

.btn--ghost {
  background: transparent;
  color: var(--vitrex-dark-blue);
  border-color: var(--vitrex-dark-blue);
}
.btn--ghost:hover {
  background: var(--vitrex-dark-blue);
  color: #fff;
  transform: translateY(-1px);
}

.btn--light {
  background: rgba(255, 255, 255, 0.95);
  color: var(--vitrex-dark-blue);
  border: 1px solid rgba(255, 255, 255, 0.3);
}
.btn--light:hover {
  background: #fff;
  transform: translateY(-1px);
}

.btn--lg { padding: 1rem 2rem; font-size: 1rem; }
.btn--block { display: block; width: 100%; }

/* ---------- 7. Hero ---------- */
.hero {
  position: relative;
  background: linear-gradient(135deg, var(--vitrex-dark-blue) 0%, #003d4d 100%);
  color: #fff;
  overflow: hidden;
  padding: 5rem 0 6rem;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 70%;
  height: 200%;
  background: radial-gradient(circle, rgba(0, 133, 163, 0.3) 0%, transparent 60%);
  pointer-events: none;
}

.hero .container { position: relative; z-index: 2; }

.hero h1 {
  color: #fff;
  margin-bottom: 1.4rem;
  max-width: 880px;
}

.hero .lead {
  color: rgba(255, 255, 255, 0.85);
  max-width: 720px;
  margin-bottom: 2rem;
  font-size: 1.2rem;
}

.hero .eyebrow { color: var(--vitrex-blue); }

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.hero-trust {
  display: flex;
  gap: 1.8rem;
  flex-wrap: wrap;
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.75);
}
.hero-trust span::before {
  content: '✓';
  color: var(--vitrex-blue);
  font-weight: 700;
  margin-right: 0.4rem;
}

.hero--small {
  padding: 4rem 0 3rem;
}
.hero--small h1 {
  font-size: clamp(1.7rem, 3.5vw, 2.4rem);
}

/* ---------- 8. Cards (génériques) ---------- */
.card {
  background: #fff;
  border-radius: var(--border-radius-lg);
  padding: 1.8rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--couleur-bordure);
  transition: var(--transition);
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--vitrex-accordeon);
}

.card h3 {
  color: var(--vitrex-dark-blue);
  margin-bottom: 0.5rem;
}

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--vitrex-light-blue);
  color: var(--vitrex-dark-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  font-size: 1.3rem;
}

.card .tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 1rem;
}
.tag {
  display: inline-block;
  padding: 0.22rem 0.6rem;
  font-size: 0.74rem;
  font-weight: 600;
  background: var(--vitrex-blue);
  color: var(--vitrex-dark-blue);
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Grilles cards */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.4rem;
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.4rem;
}
.grid-auto {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.4rem;
}

/* ---------- 9. Pricing ---------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.6rem;
  max-width: 880px;
  margin: 0 auto;
}

.pricing-card {
  background: #fff;
  border: 1px solid var(--couleur-bordure);
  border-radius: var(--border-radius-lg);
  padding: 2.2rem 1.8rem;
  position: relative;
  transition: var(--transition);
}
.pricing-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
  border-color: var(--vitrex-principal);
  box-shadow: 0 4px 20px rgba(0, 133, 163, 0.18);
}
.pricing-card.featured::before {
  content: 'Recommandé';
  position: absolute;
  top: -12px;
  left: 1.8rem;
  padding: 0.25rem 0.7rem;
  background: var(--vitrex-principal);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-radius: 999px;
}

.pricing-card h3 {
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.4rem;
}

.pricing-amount {
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--vitrex-dark-blue);
  line-height: 1.1;
  margin-bottom: 0.2rem;
}
.pricing-amount small {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--couleur-texte-tertiaire);
}

.pricing-period {
  display: block;
  font-size: 0.85rem;
  color: var(--couleur-texte-tertiaire);
  margin-bottom: 1.2rem;
}

.pricing-includes {
  margin: 1.4rem 0 1.8rem;
}
.pricing-includes li {
  padding: 0.4rem 0;
  font-size: 0.92rem;
  color: var(--couleur-texte-secondaire);
  border-bottom: 1px solid #f0f0f0;
  position: relative;
  padding-left: 1.3rem;
}
.pricing-includes li:last-child { border-bottom: none; }
.pricing-includes li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--couleur-succes);
  font-weight: 700;
}

/* Options supplémentaires (4 cards plus compactes) */
.pricing-extras {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-top: 3rem;
}

.pricing-extra {
  background: var(--vitrex-light-blue);
  border-radius: var(--border-radius-md);
  padding: 1.4rem;
  text-align: center;
  border: 1px solid transparent;
  transition: var(--transition);
}
.pricing-extra:hover {
  border-color: var(--vitrex-accordeon);
  transform: translateY(-2px);
}
.pricing-extra-amount {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--vitrex-dark-blue);
  margin-bottom: 0.3rem;
}
.pricing-extra-amount small {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--couleur-texte-tertiaire);
}
.pricing-extra-label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--couleur-texte);
  margin-bottom: 0.4rem;
}
.pricing-extra-desc {
  font-size: 0.78rem;
  color: var(--couleur-texte-tertiaire);
  line-height: 1.4;
}

/* ---------- 10. FAQ ---------- */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  background: #fff;
  border: 1px solid var(--couleur-bordure);
  border-radius: var(--border-radius-md);
  margin-bottom: 0.7rem;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: var(--vitrex-accordeon); }
.faq-item.open { border-color: var(--vitrex-principal); }

.faq-question {
  width: 100%;
  padding: 1.1rem 1.4rem;
  background: var(--vitrex-blue);
  color: var(--vitrex-dark-blue);
  border: none;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
}
.faq-question::after {
  content: '+';
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--vitrex-dark-blue);
}
.faq-item.open .faq-question {
  background: var(--vitrex-accordeon);
}
.faq-item.open .faq-question::after { content: '−'; }

.faq-answer {
  padding: 0 1.4rem;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  color: var(--couleur-texte-secondaire);
  line-height: 1.6;
}
.faq-item.open .faq-answer {
  padding: 1.2rem 1.4rem;
  max-height: 600px;
}

/* ---------- 11. Workflow / Étapes ---------- */
.workflow {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  position: relative;
  margin-top: 2rem;
}
.workflow::before {
  content: '';
  position: absolute;
  top: 28px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: linear-gradient(90deg, var(--vitrex-blue), var(--vitrex-principal), var(--vitrex-blue));
  z-index: 0;
}

.step {
  text-align: center;
  position: relative;
  z-index: 1;
  padding: 0 0.6rem;
}
.step-num {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--vitrex-principal);
  color: var(--vitrex-dark-blue);
  font-size: 1.3rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  box-shadow: var(--shadow-blue);
}
.step h4 {
  font-size: 1rem;
  margin-bottom: 0.3rem;
  color: var(--vitrex-dark-blue);
}
.step p {
  font-size: 0.85rem;
  color: var(--couleur-texte-tertiaire);
  margin: 0;
}

/* ---------- 12. Comparaison Avant / Après ---------- */
.compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  max-width: 980px;
  margin: 0 auto;
}
.compare-block {
  padding: 2rem;
  border-radius: var(--border-radius-lg);
}
.compare-before {
  background: #fef2f2;
  border-left: 4px solid var(--couleur-danger);
}
.compare-after {
  background: #f0fdf4;
  border-left: 4px solid var(--couleur-succes);
}
.compare h3 {
  font-size: 1.1rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.compare-before h3 { color: #991b1b; }
.compare-after h3 { color: #065f46; }
.compare ul { margin: 0; }
.compare li {
  padding: 0.5rem 0;
  font-size: 0.94rem;
  color: var(--couleur-texte-secondaire);
  position: relative;
  padding-left: 1.4rem;
}
.compare-before li::before {
  content: '✗';
  position: absolute;
  left: 0;
  color: var(--couleur-danger);
  font-weight: 700;
}
.compare-after li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--couleur-succes);
  font-weight: 700;
}

/* ---------- 13. Screenshots ---------- */
.screenshot-tabs {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 2rem;
}
.screenshot-tab {
  padding: 0.6rem 1.2rem;
  background: var(--vitrex-light-blue);
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--vitrex-dark-blue);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}
.screenshot-tab:hover { border-color: var(--vitrex-accordeon); }
.screenshot-tab.active {
  background: var(--vitrex-principal);
  color: #fff;
}

.screenshot-frame {
  background: #1e293b;
  border-radius: var(--border-radius-lg);
  padding: 0.6rem;
  box-shadow: 0 20px 50px rgba(0, 95, 115, 0.18);
  max-width: 1080px;
  margin: 0 auto;
}
.screenshot-frame img {
  border-radius: 6px;
  width: 100%;
}

/* ---------- 14. Formulaires ---------- */
.form-row {
  margin-bottom: 1.2rem;
}
.form-row.two {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
}

label {
  display: block;
  margin-bottom: 0.45rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--vitrex-dark-blue);
  letter-spacing: 0.02em;
}

input[type=text],
input[type=email],
input[type=tel],
input[type=url],
select,
textarea {
  width: 100%;
  padding: 0.7rem 0.9rem;
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--couleur-texte);
  background: var(--vitrex-input-bg);
  border: 1px solid var(--couleur-bordure);
  border-radius: var(--border-radius);
  transition: var(--transition);
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--vitrex-principal);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(0, 133, 163, 0.15);
}
textarea { resize: vertical; min-height: 130px; line-height: 1.5; }

.form-error {
  display: none;
  padding: 0.9rem 1.2rem;
  background: #fde7e7;
  border-left: 3px solid var(--couleur-danger);
  color: #7a1d1d;
  margin-bottom: 1.4rem;
  font-size: 0.9rem;
  border-radius: 4px;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 3rem;
  align-items: start;
}
.contact-info strong {
  display: block;
  margin-top: 1.1rem;
  margin-bottom: 0.2rem;
  color: var(--vitrex-dark-blue);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.contact-info strong:first-child { margin-top: 0; }

/* ---------- 15. Section sécurité (cards plus douces) ---------- */
.security-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.4rem;
  margin-top: 2rem;
}
.security-card {
  text-align: center;
  padding: 1.8rem 1.2rem;
}
.security-card .card-icon {
  margin-left: auto;
  margin-right: auto;
  width: 56px;
  height: 56px;
  font-size: 1.6rem;
}

/* ---------- 16. Footer ---------- */
.site-footer {
  background: var(--vitrex-dark-blue);
  color: rgba(255, 255, 255, 0.8);
  padding: 3.5rem 0 1.8rem;
  font-size: 0.92rem;
}
.site-footer p {
  color: rgba(255, 255, 255, 0.78);
  margin-bottom: 0.5rem;
}
.site-footer h4 {
  color: #fff;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}
.site-footer a {
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
}
.site-footer a:hover { color: var(--vitrex-blue); }

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.footer-grid ul li { padding: 0.25rem 0; }

.brand-footer { color: rgba(255, 255, 255, 0.7); }
.brand-footer .brand {
  color: #fff;
  margin-bottom: 1rem;
}
.brand-footer p { color: rgba(255, 255, 255, 0.6); font-size: 0.88rem; line-height: 1.6; }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 1.4rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.5);
}
.footer-bottom a { color: rgba(255, 255, 255, 0.6); }
.footer-bottom a:hover { color: var(--vitrex-blue); }

/* ---------- 17. KPI / Stats inline ---------- */
.kpi-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin: 2rem 0;
}
.kpi {
  text-align: center;
  padding: 1.2rem 0.8rem;
  background: var(--vitrex-light-blue);
  border-radius: var(--border-radius-md);
}
.kpi-value {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--vitrex-dark-blue);
  line-height: 1;
}
.kpi-label {
  font-size: 0.78rem;
  color: var(--couleur-texte-tertiaire);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.3rem;
}

/* ---------- 18. Responsive ---------- */
@media (max-width: 980px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .pricing-extras { grid-template-columns: repeat(2, 1fr); }
  .security-grid { grid-template-columns: repeat(2, 1fr); }
  .workflow { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
  .workflow::before { display: none; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; gap: 2rem; }
  .kpi-row { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  section { padding: 3rem 0; }
  .container { padding: 0 1.2rem; }

  .nav-toggle { display: block; }
  .nav-main {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 1rem;
    border-top: 1px solid var(--couleur-bordure);
    box-shadow: var(--shadow-lg);
    gap: 0.4rem;
  }
  .nav-main.open { display: flex; }
  .nav-main a { padding: 0.7rem 0.5rem; }

  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 480px; }
  .pricing-extras { grid-template-columns: 1fr; }
  .security-grid { grid-template-columns: 1fr; }
  .workflow { grid-template-columns: 1fr; }
  .compare { grid-template-columns: 1fr; }
  .form-row.two { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }

  .hero { padding: 3.5rem 0 4rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; text-align: center; }
}

/* ---------- 19. Utilitaires ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

/* ---------- 20. Animations ---------- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeInUp 0.5s ease-out; }