/* ==========================================================================
   DA Micro Services — Feuille de style globale
   Approche : mobile-first, CSS natif, variables CSS, pas de framework.
   Sections :
     1. Variables (couleurs, typo, espaces)
     2. Reset minimal
     3. Base & typographie
     4. Layout (container, sections)
     5. Boutons
     6. Cards
     7. Navigation (sticky + burger mobile)
     8. Footer
     9. Composants pages (hero, processus, tarifs, FAQ, formulaire…)
    10. Animations (fade-in au scroll)
    11. Media queries (768px tablette, 1024px desktop)
   ========================================================================== */


/* 1. VARIABLES
   ------------------------------------------------------------------------- */
:root {
  /* Couleurs */
  --color-bg:        #FFFFFF;
  --color-bg-alt:    #F7F7F5;
  --color-bg-dark:   #1A1A1A;
  --color-text:      #4B4B4B;
  --color-heading:   #1A1A1A;
  --color-cta:       #2563EB;
  --color-cta-hover: #1D4FD8;
  --color-border:    #E5E5E5;
  --color-muted:     #8A8A8A;

  /* Typographie */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Espacements */
  --space-xs:  0.5rem;   /*  8px */
  --space-sm:  1rem;     /* 16px */
  --space-md:  1.5rem;   /* 24px */
  --space-lg:  2.5rem;   /* 40px */
  --space-xl:  5rem;     /* 80px */
  --space-2xl: 7.5rem;   /* 120px */

  /* Rayons et ombres */
  --radius-card:   8px;
  --radius-button: 6px;
  --shadow-soft:   0 2px 12px rgba(0, 0, 0, 0.06);

  /* Transitions */
  --transition: 0.3s ease;

  /* Largeur max contenu */
  --max-width: 1100px;
}


/* 2. RESET MINIMAL
   ------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body,
h1, h2, h3, h4, p,
ul, ol, figure, blockquote {
  margin: 0;
}

ul, ol {
  padding: 0;
  list-style: none;
}

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

button {
  font: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

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

input,
textarea,
select {
  font: inherit;
  color: inherit;
}


/* 3. BASE & TYPOGRAPHIE
   ------------------------------------------------------------------------- */
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  color: var(--color-heading);
  line-height: 1.2;
  font-weight: 600;
}

/* H1 : 32 mobile, 48 desktop (cf. media queries en bas) */
h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.125rem; font-weight: 500; }

p + p {
  margin-top: var(--space-sm);
}

/* Lien texte (dans le contenu courant) */
.link-inline {
  color: var(--color-cta);
  text-decoration: underline;
  text-underline-offset: 3px;
}


/* 4. LAYOUT
   ------------------------------------------------------------------------- */

/* Skip link — invisible jusqu'à reception du focus clavier.
   Permet à un utilisateur de tabuler directement au contenu sans
   re-parcourir la navigation (WCAG 2.4.1 Bypass Blocks). */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--color-cta);
  color: #FFFFFF;
  padding: 12px 16px;
  font-weight: 500;
  text-decoration: none;
  border-radius: 0 0 6px 0;
  z-index: 1000;
  transition: top 0.2s ease;
}
.skip-link:focus {
  top: 0;
  outline: 3px solid #FFFFFF;
  outline-offset: -3px;
}

/* Indicateur de focus générique (clavier) sur les liens / boutons —
   les utilisateurs souris ne le voient pas (:focus-visible). */
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--color-cta);
  outline-offset: 3px;
  border-radius: 2px;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* Espacement vertical des sections — mobile d'abord */
.section {
  padding: var(--space-xl) 0;
}

.section--alt {
  background: var(--color-bg-alt);
}

.section--dark {
  background: var(--color-bg-dark);
  color: #E5E5E5;
}
.section--dark h1,
.section--dark h2,
.section--dark h3 {
  color: #FFFFFF;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto var(--space-lg);
}

.section-header p {
  margin-top: var(--space-sm);
  color: var(--color-text);
}


/* 5. BOUTONS
   ------------------------------------------------------------------------- */
.btn {
  display: inline-block;
  font-size: 0.9375rem;        /* 15px */
  font-weight: 500;
  line-height: 1;
  padding: 14px 22px;
  min-height: 44px;            /* zone cliquable mobile */
  border-radius: var(--radius-button);
  transition: background var(--transition), color var(--transition), transform var(--transition);
  text-align: center;
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 2px solid var(--color-cta);
  outline-offset: 2px;
}

/* Variantes */
.btn--primary {
  background: var(--color-cta);
  color: #FFFFFF;
}
.btn--primary:hover {
  background: var(--color-cta-hover);
}

.btn--secondary {
  background: transparent;
  color: var(--color-heading);
  border: 1px solid var(--color-border);
}
.btn--secondary:hover {
  background: var(--color-bg-alt);
}

.btn--light {
  background: #FFFFFF;
  color: var(--color-heading);
}
.btn--light:hover {
  background: #F0F0F0;
}


/* 6. CARDS
   ------------------------------------------------------------------------- */
.card {
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: var(--space-md);
  transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-soft);
}

.card h3 {
  margin-bottom: var(--space-xs);
  color: var(--color-heading);
  font-weight: 600;
  font-size: 1.125rem;
}


/* 7. NAVIGATION
   ------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}

.nav__logo {
  font-weight: 600;
  font-size: 1.0625rem;        /* 17px */
  color: var(--color-heading);
  letter-spacing: -0.01em;
}

/* Liste de liens — cachée par défaut sur mobile (burger) */
.nav__list {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  flex-direction: column;
  gap: 0;
  background: #FFFFFF;
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-sm) var(--space-md) var(--space-md);
}

.nav.open .nav__list {
  display: flex;
}

.nav__list a {
  display: block;
  padding: 12px 0;
  color: var(--color-text);
  font-weight: 500;
  border-bottom: 1px solid var(--color-border);
}

.nav__list a:last-child {
  border-bottom: none;
}

.nav__list a:hover,
.nav__list a.active {
  color: var(--color-heading);
}

/* Lien actif (page courante) — exclut .btn pour ne pas casser le CTA */
.nav__list a.active:not(.btn) {
  color: var(--color-cta);
}

/* CTA dans la nav — visible séparément
   Override : préserver le style bouton (sinon le texte blanc est écrasé
   par la règle .nav__list a { color: var(--color-text); } ci-dessus). */
.nav__cta {
  margin-top: var(--space-sm);
}

.nav__list a.btn {
  color: #FFFFFF;
  padding: 14px 22px;
  border-bottom: none;
  text-align: center;
}
.nav__list a.btn:hover {
  color: #FFFFFF;
  background: var(--color-cta-hover);
}

/* Bouton burger */
.nav__burger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
}

.nav__burger span {
  display: block;
  height: 2px;
  background: var(--color-heading);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav.open .nav__burger span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav.open .nav__burger span:nth-child(2) {
  opacity: 0;
}
.nav.open .nav__burger span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}


/* 8. FOOTER
   ------------------------------------------------------------------------- */
.site-footer {
  background: var(--color-bg-alt);
  color: var(--color-text);
  padding: var(--space-lg) 0;
  font-size: 0.9375rem;
}

.site-footer__top {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  align-items: flex-start;
}

.site-footer__brand {
  font-weight: 600;
  color: var(--color-heading);
}

.site-footer__tagline {
  display: block;
  font-weight: 400;
  color: var(--color-text);
  margin-top: 2px;
  font-size: 0.875rem;
}

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.site-footer__links a:hover {
  color: var(--color-heading);
}

.site-footer__copy {
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
  font-size: 0.8125rem;
  color: var(--color-muted);
}


/* 9. COMPOSANTS PAGES
   ------------------------------------------------------------------------- */

/* --- Hero -------------------------------------------------------------- */
.hero {
  padding: var(--space-xl) 0;
  text-align: center;
}

.hero__title {
  max-width: 800px;
  margin: 0 auto;
}

.hero__subtitle {
  max-width: 640px;
  margin: var(--space-md) auto 0;
  font-size: 1.0625rem;
  color: var(--color-text);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

/* Hero sobre (pages internes) — moins de padding */
.hero--compact {
  padding: var(--space-lg) 0 var(--space-md);
}


/* --- Grille 3 colonnes (atouts, processus, tarifs…) -------------------- */
.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}


/* --- Étapes du processus ---------------------------------------------- */
.step {
  text-align: left;
  padding: var(--space-md) 0;
}

.step__num {
  display: inline-block;
  font-size: 2rem;
  font-weight: 600;
  color: var(--color-cta);
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.step__title {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-heading);
}


/* --- Témoignages ------------------------------------------------------- */
.testimonial {
  background: #FFFFFF;
  border-left: 3px solid var(--color-cta);
  padding: var(--space-md);
  border-radius: 0 var(--radius-card) var(--radius-card) 0;
}

.testimonial__quote {
  font-size: 1.0625rem;
  color: var(--color-heading);
  font-style: italic;
}

.testimonial__author {
  display: block;
  margin-top: var(--space-sm);
  font-size: 0.9375rem;
  color: var(--color-text);
  font-style: normal;
}


/* --- Réalisations (portfolio "Ils nous ont fait confiance") ---------- */
.portfolio {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
}

.portfolio__card {
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition), transform var(--transition);
  text-decoration: none;
  color: inherit;
}

.portfolio__card:hover {
  box-shadow: var(--shadow-soft);
  transform: translateY(-3px);
}

.portfolio__img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: top center;
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
  display: block;
}

.portfolio__body {
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  flex: 1;
}

.portfolio__name {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-heading);
  margin-bottom: 4px;
}

.portfolio__meta {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-bottom: var(--space-sm);
}

.portfolio__link {
  margin-top: auto;
  color: var(--color-cta);
  font-weight: 500;
  font-size: 0.9375rem;
}

.portfolio__link::after {
  content: " \2192"; /* flèche → */
  display: inline-block;
  transition: transform var(--transition);
}

.portfolio__card:hover .portfolio__link::after {
  transform: translateX(3px);
}


/* --- CTA finale (section sombre) -------------------------------------- */
.cta-final {
  text-align: center;
}

.cta-final h2 {
  font-size: 1.75rem;
  margin-bottom: var(--space-sm);
}

.cta-final p {
  color: #BFBFBF;
  max-width: 520px;
  margin: 0 auto var(--space-lg);
}


/* --- Inclus toujours (liste check) ------------------------------------ */
.includes {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
  max-width: 720px;
  margin: 0 auto;
}

.includes li {
  position: relative;
  padding-left: 28px;
  color: var(--color-text);
}

.includes li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--color-cta);
  font-weight: 600;
}


/* --- Tarifs (cards forfaits) ------------------------------------------ */
.pricing {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  align-items: stretch;
}

.pricing__card {
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: var(--space-lg) var(--space-md);
  display: flex;
  flex-direction: column;
  position: relative;
}

.pricing__card--featured {
  border: 2px solid var(--color-cta);
}

.pricing__badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-cta);
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: 999px;
  white-space: nowrap;
}

.pricing__name {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-heading);
}

.pricing__price {
  font-size: 2rem;
  font-weight: 600;
  color: var(--color-heading);
  margin: var(--space-xs) 0 var(--space-md);
}

.pricing__price span {
  font-size: 0.9375rem;
  font-weight: 400;
  color: var(--color-muted);
}

.pricing__features {
  flex: 1;
  margin-bottom: var(--space-md);
}

.pricing__features li {
  padding: 6px 0 6px 24px;
  position: relative;
  font-size: 0.9375rem;
}

.pricing__features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-cta);
  font-weight: 600;
}

.pricing__features li.is-excluded {
  color: var(--color-muted);
}

.pricing__features li.is-excluded::before {
  content: "✗";
  color: var(--color-muted);
}


/* --- FAQ accordéon ----------------------------------------------------- */
.faq {
  max-width: 720px;
  margin: 0 auto;
}

.faq__item {
  border-bottom: 1px solid var(--color-border);
}

.faq__question {
  width: 100%;
  text-align: left;
  padding: var(--space-md) 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-heading);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-sm);
}

.faq__icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  position: relative;
  transition: transform var(--transition);
}
.faq__icon::before,
.faq__icon::after {
  content: "";
  position: absolute;
  background: var(--color-heading);
  top: 50%;
  left: 50%;
}
.faq__icon::before {
  width: 12px;
  height: 2px;
  transform: translate(-50%, -50%);
}
.faq__icon::after {
  width: 2px;
  height: 12px;
  transform: translate(-50%, -50%);
  transition: transform var(--transition);
}

.faq__item.is-open .faq__icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.faq__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition);
}

.faq__answer-inner {
  padding-bottom: var(--space-md);
  color: var(--color-text);
}


/* --- Formulaire contact ----------------------------------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.form {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.form__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
}

.form__group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form__label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-heading);
}

.form__input,
.form__textarea {
  width: 100%;
  padding: 12px 14px;
  font-size: 1rem;
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-button);
  transition: border-color var(--transition);
}

.form__input:focus,
.form__textarea:focus {
  outline: none;
  border-color: var(--color-cta);
  /* Halo bleu de focus — visible pour les utilisateurs clavier (a11y WCAG 2.4.7) */
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.18);
}

.form__textarea {
  min-height: 140px;
  resize: vertical;
}

/* Honeypot anti-spam (caché aux humains, visible aux bots) */
.form__honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.form__feedback {
  margin-top: var(--space-sm);
  padding: var(--space-sm);
  border-radius: var(--radius-button);
  font-size: 0.9375rem;
  display: none;
}
.form__feedback.is-success {
  display: block;
  background: #ECFDF5;
  color: #047857;
  border: 1px solid #A7F3D0;
}
.form__feedback.is-error {
  display: block;
  background: #FEF2F2;
  color: #B91C1C;
  border: 1px solid #FECACA;
}

/* Bloc infos à côté du formulaire */
.contact-info {
  background: var(--color-bg-alt);
  border-radius: var(--radius-card);
  padding: var(--space-md);
}

.contact-info h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-heading);
  margin-bottom: var(--space-sm);
}

.contact-info a {
  color: var(--color-cta);
}
.contact-info a:hover {
  text-decoration: underline;
}

.contact-info dl {
  display: grid;
  gap: var(--space-sm);
}
.contact-info dt {
  font-size: 0.8125rem;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.contact-info dd {
  margin: 4px 0 0;
  font-size: 0.9375rem;
}


/* 10. ANIMATIONS (fade-in au scroll)
   ------------------------------------------------------------------------- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Respecte les préférences utilisateur */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
    scroll-behavior: auto !important;
  }
  .fade-in {
    opacity: 1;
    transform: none;
  }
}


/* 11. MEDIA QUERIES
   ------------------------------------------------------------------------- */

/* Tablette ≥ 768px ----------------------------------------------------- */
@media (min-width: 768px) {

  h1 { font-size: 2.5rem; }
  h2 { font-size: 1.875rem; }

  .container {
    padding: 0 var(--space-lg);
  }

  .section {
    padding: var(--space-2xl) 0;
  }

  /* Grilles */
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
  .grid-2 {
    grid-template-columns: 1fr 1fr;
  }

  /* Processus : 4 étapes en ligne */
  .steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
  }

  /* Tarifs : 3 colonnes */
  .pricing {
    grid-template-columns: repeat(3, 1fr);
  }
  /* Carte mise en avant légèrement surélevée */
  .pricing__card--featured {
    transform: translateY(-8px);
  }

  /* Maintenance : 2 colonnes */
  .maintenance {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    max-width: 800px;
    margin: 0 auto;
  }

  /* Includes : 2 colonnes */
  .includes {
    grid-template-columns: 1fr 1fr;
    column-gap: var(--space-lg);
  }

  /* Formulaire contact : 60/40 */
  .contact-grid {
    grid-template-columns: 3fr 2fr;
    align-items: start;
  }
  .form__row {
    grid-template-columns: 1fr 1fr;
  }
}

/* Desktop ≥ 1024px ----------------------------------------------------- */
@media (min-width: 1024px) {

  h1 { font-size: 3rem; }      /* 48px */
  h2 { font-size: 2rem; }      /* 32px */

  .hero {
    padding: var(--space-2xl) 0;
  }

  /* Navigation : on sort de la version burger */
  .nav__burger {
    display: none;
  }

  .nav__list {
    display: flex;
    position: static;
    flex-direction: row;
    align-items: center;
    gap: var(--space-md);
    background: transparent;
    border: none;
    padding: 0;
  }

  .nav__list a {
    padding: 0;
    border-bottom: none;
  }

  .nav__list a.active {
    color: var(--color-cta);
  }

  .nav__cta {
    margin-top: 0;
    margin-left: var(--space-sm);
  }

  /* Footer : ligne horizontale */
  .site-footer__top {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}