/* ==========================================================================
   LANDING PAGE — MÉTAUX LOURDS — CHARTE GRAPHIQUE PREMIUM
   Style éditorial : "Santé Magazine rencontre Le Monde"
   ========================================================================== */

/* --------------------------------------------------------------------------
   IMPORTS — Google Fonts
   -------------------------------------------------------------------------- */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400;1,600&family=Lato:wght@300;400;700&display=swap');

/* --------------------------------------------------------------------------
   VARIABLES CSS
   -------------------------------------------------------------------------- */
:root {
  /* Palette */
  --color-bg:            #FAFAF7;
  --color-bg-alt:        #F5F0E8;
  --color-green-deep:    #3D6B4F;
  --color-green-light:   #6BAE75;
  --color-green-pale:    #EEF4EC;
  --color-text:          #1E1E1E;
  --color-text-muted:    #5A5A5A;
  --color-border-source: #3D6B4F;
  --color-white:         #FFFFFF;

  /* Typographie */
  --font-serif:    'Playfair Display', Georgia, serif;
  --font-sans:     'Lato', 'Inter', Arial, sans-serif;

  /* Tailles de police */
  --fs-body:       17px;
  --fs-small:      14px;
  --fs-h1:         clamp(2.2rem, 5vw, 3.6rem);
  --fs-h2:         clamp(1.7rem, 3.5vw, 2.6rem);

  /* *** H3 RENFORCÉ ***
     Précédemment ~1.1-1.2rem, maintenant nettement plus visible */
  --fs-h3:         clamp(1.25rem, 2.5vw, 1.6rem);

  --line-height:   1.75;
  --max-width:     860px;
  --max-width-wide: 1100px;

  /* Espacement */
  --section-gap:   80px;
  --section-gap-sm: 48px;
}

/* --------------------------------------------------------------------------
   RESET & BASE
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--line-height);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--color-green-deep);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-green-light);
}

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

/* --------------------------------------------------------------------------
   TYPOGRAPHIE — HIÉRARCHIE ÉDITORIALE
   -------------------------------------------------------------------------- */

/* H1 : Titre principal hero */
h1 {
  font-family: var(--font-serif);
  font-size: var(--fs-h1);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

/* H2 : Titres de section */
h2 {
  font-family: var(--font-serif);
  font-size: var(--fs-h2);
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-text);
  letter-spacing: -0.01em;
  margin-bottom: 1.2rem;
}

/* ==========================================================================
   H3 — RENFORCÉ (modification principale)
   Avant : trop proche du corps de texte, manque de hiérarchie
   Après : taille plus grande, graisse affirmée, couleur vert profond,
           espacement augmenté, soulignement décoratif fin
   ========================================================================== */
h3 {
  font-family: var(--font-sans);
  font-size: var(--fs-h3);          /* clamp(1.25rem, 2.5vw, 1.6rem) — +35% vs base */
  font-weight: 700;                  /* Bold affirmatif */
  line-height: 1.35;
  color: var(--color-green-deep);   /* Vert profond — distingue du corps noir */
  letter-spacing: 0.01em;
  margin-top: 2.4rem;               /* Respiration avant le sous-titre */
  margin-bottom: 0.85rem;
  padding-bottom: 0.35rem;
  border-bottom: 2px solid var(--color-green-pale); /* Séparateur fin, élégant */
  display: inline-block;            /* Pour que la bordure ne dépasse pas le texte */
}

/* H3 en contexte de section blanche/beige : identique */
.section-white h3,
.section-beige h3 {
  color: var(--color-green-deep);
}

/* H3 sur fond vert (section transition) : texte blanc */
.section-green h3 {
  color: var(--color-white);
  border-bottom-color: rgba(255, 255, 255, 0.25);
}

/* H3 "pré-titre" / label de produit (usage spécifique avec classe) */
h3.pre-titre {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-green-deep);
  border-bottom: none;
  padding-bottom: 0;
  margin-top: 0;
  margin-bottom: 0.5rem;
  display: block;
}

/* --------------------------------------------------------------------------
   PARAGRAPHES & CHAPEAU D'ARTICLE
   -------------------------------------------------------------------------- */
p {
  margin-bottom: 1.2rem;
  color: var(--color-text);
}

p:last-child {
  margin-bottom: 0;
}

.chapeau {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.65;
  color: var(--color-text);
  margin-bottom: 1.8rem;
}

/* --------------------------------------------------------------------------
   NAVIGATION STICKY
   -------------------------------------------------------------------------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-white);
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.07);
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar__brand {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-decoration: none;
}

.navbar__links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.navbar__links a {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-text-muted);
  transition: color 0.2s;
}

.navbar__links a:hover {
  color: var(--color-green-deep);
}

/* Hamburger mobile */
.navbar__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

.navbar__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: transform 0.3s ease;
}

.navbar__mobile-menu {
  display: none;
  position: absolute;
  top: 60px;
  left: 0;
  right: 0;
  background: var(--color-white);
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  padding: 16px 24px 20px;
}

.navbar__mobile-menu.open {
  display: block;
}

.navbar__mobile-menu a {
  display: block;
  padding: 10px 0;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-bg-alt);
}

/* --------------------------------------------------------------------------
   LAYOUT — SECTIONS
   -------------------------------------------------------------------------- */
.section {
  padding: var(--section-gap) 24px;
}

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

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

.section-green {
  background-color: var(--color-green-deep);
  color: var(--color-white);
}

.section-green h2 {
  color: var(--color-white);
}

.section-green p {
  color: rgba(255, 255, 255, 0.9);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.container--wide {
  max-width: var(--max-width-wide);
  margin: 0 auto;
}

.text-center {
  text-align: center;
}

/* --------------------------------------------------------------------------
   PRÉ-TITRE DE SECTION
   -------------------------------------------------------------------------- */
.pre-section-label {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-green-deep);
  margin-bottom: 0.75rem;
}

.section-green .pre-section-label {
  color: rgba(255, 255, 255, 0.65);
}

/* --------------------------------------------------------------------------
   SECTION HERO
   -------------------------------------------------------------------------- */
.hero {
  background-color: var(--color-bg-alt);
  padding: 80px 24px 64px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero__deco {
  position: absolute;
  opacity: 0.06;
  pointer-events: none;
}

.hero__deco--right {
  right: -40px;
  top: 20px;
  width: 320px;
}

.hero__deco--left {
  left: -40px;
  bottom: 20px;
  width: 260px;
}

.hero__pre-title {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-green-deep);
  margin-bottom: 1.2rem;
}

.hero__title {
  max-width: 720px;
  margin: 0 auto 1.4rem;
}

.hero__subtitle {
  max-width: 600px;
  margin: 0 auto 2.4rem;
  font-size: 1.08rem;
  color: var(--color-text-muted);
  font-style: italic;
  line-height: 1.65;
}

.hero__stat {
  margin: 0 auto 2rem;
}

.hero__stat-number {
  font-family: var(--font-serif);
  font-size: clamp(3.5rem, 8vw, 6rem);
  font-weight: 700;
  color: var(--color-green-deep);
  line-height: 1;
  display: block;
}

.hero__stat-label {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-top: 0.5rem;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.55;
}

.hero__anchors {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-top: 0.5rem;
}

.hero__anchors a {
  color: var(--color-green-deep);
  text-decoration: none;
  font-weight: 700;
}

.hero__anchors a:hover {
  text-decoration: underline;
}

/* --------------------------------------------------------------------------
   STAT CHOC (grands chiffres dans les sections produits)
   -------------------------------------------------------------------------- */
.stat-choc {
  text-align: center;
  margin: 2.4rem 0;
}

.stat-choc__number {
  display: block;
  font-family: var(--font-serif);
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 700;
  color: var(--color-green-deep);
  line-height: 1;
}

.stat-choc__label {
  display: block;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-top: 0.5rem;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.55;
}

/* --------------------------------------------------------------------------
   ENCADRÉ CITATION FORTE (pull-quote éditorial)
   -------------------------------------------------------------------------- */
.blockquote-strong {
  background-color: var(--color-green-pale);
  border-left: 4px solid var(--color-green-deep);
  padding: 20px 28px;
  margin: 2.4rem 0;
  border-radius: 0 4px 4px 0;
}

.blockquote-strong p {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-style: italic;
  color: var(--color-green-deep);
  line-height: 1.65;
  margin: 0;
}

.blockquote-strong cite {
  display: block;
  margin-top: 0.75rem;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-style: normal;
  color: var(--color-text-muted);
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   ENCADRÉ SOURCES
   -------------------------------------------------------------------------- */
.sources-box {
  background-color: var(--color-green-pale);
  border-left: 3px solid var(--color-green-deep);
  padding: 18px 24px;
  margin: 2.4rem 0;
  border-radius: 0 4px 4px 0;
}

.sources-box__title {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-green-deep);
  margin-bottom: 0.75rem;
}

.sources-box ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sources-box li {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  line-height: 1.55;
  margin-bottom: 0.4rem;
  padding-left: 0;
}

.sources-box li::before {
  content: "–  ";
  color: var(--color-green-light);
}

.sources-box a {
  color: var(--color-green-deep);
  font-size: 0.82rem;
}

/* --------------------------------------------------------------------------
   BLOCS PRODUITS
   -------------------------------------------------------------------------- */
.product-block {
  padding: var(--section-gap) 24px;
}

.product-block--white {
  background-color: var(--color-bg);
  border-left: 4px solid var(--color-green-deep);
  padding-left: 28px;
}

.product-block--beige {
  background-color: var(--color-bg-alt);
}

/* --------------------------------------------------------------------------
   ENCADRÉ CTA PRODUIT
   -------------------------------------------------------------------------- */
.cta-product-box {
  background-color: var(--color-white);
  border: 1px solid var(--color-green-deep);
  border-radius: 8px;
  box-shadow: 0 4px 18px rgba(61, 107, 79, 0.10);
  padding: 28px 32px;
  margin: 2.8rem 0;
  max-width: 480px;
}

.cta-product-box__title {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 0.4rem;
}

.cta-product-box__desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 1.2rem;
  line-height: 1.55;
}

.btn {
  display: inline-block;
  padding: 13px 24px;
  min-height: 48px;
  border-radius: 6px;
  font-family: var(--font-sans);
  font-size: 0.92rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease;
  text-align: center;
  line-height: 1.3;
}

.btn--primary {
  background-color: var(--color-green-deep);
  color: var(--color-white);
  border: none;
}

.btn--primary:hover {
  background-color: #2e5239;
  color: var(--color-white);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-green-deep);
  border: 2px solid var(--color-green-deep);
}

.btn--outline:hover {
  background-color: var(--color-green-pale);
  color: var(--color-green-deep);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 0.75rem;
}

/* --------------------------------------------------------------------------
   BLOC VIDÉO
   -------------------------------------------------------------------------- */
.video-section {
  background-color: var(--color-bg-alt);
  padding: var(--section-gap) 24px;
  text-align: center;
}

.video-wrapper {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  max-width: 820px;
  margin: 1.6rem auto 0;
  border-radius: 8px;
  background: #000;
}

.video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
  border-radius: 8px;
}

.video-note {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  font-style: italic;
  margin-top: 0.75rem;
  text-align: center;
}

.video-intro {
  font-size: 0.95rem;
  font-style: italic;
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0 auto 0.5rem;
  line-height: 1.65;
}

/* --------------------------------------------------------------------------
   SÉPARATEURS ORGANIQUES SVG
   -------------------------------------------------------------------------- */
.wave-separator {
  overflow: hidden;
  line-height: 0;
  margin: 0;
}

.wave-separator svg {
  display: block;
  width: 100%;
}

/* --------------------------------------------------------------------------
   SECTION CONSEILS PRATIQUES
   -------------------------------------------------------------------------- */
.tips-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.4rem;
  margin-top: 2rem;
}

@media (min-width: 680px) {
  .tips-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.tip-item {
  padding: 0;
}

/* ==========================================================================
   H3 EN CONTEXTE TIP ITEM — Renforcé avec indicateur visuel supplémentaire
   ========================================================================== */
.tip-item h3 {
  position: relative;
  padding-left: 14px;
  border-bottom: none;
  border-left: 3px solid var(--color-green-light);
  display: block;
  margin-top: 0;
}

/* --------------------------------------------------------------------------
   FAQ — ACCORDÉON NATIF
   -------------------------------------------------------------------------- */
.faq-list {
  margin-top: 2rem;
  border-top: 1px solid #e0dbd1;
}

details {
  border-bottom: 1px solid #e0dbd1;
}

summary {
  cursor: pointer;
  padding: 20px 0;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

summary::-webkit-details-marker {
  display: none;
}

/* ==========================================================================
   H3 DANS LE RÉSUMÉ FAQ — traitement spécifique
   ========================================================================== */
summary h3 {
  font-family: var(--font-sans);
  font-size: clamp(1.05rem, 2vw, 1.25rem);  /* légèrement plus petit que les H3 de section */
  font-weight: 700;
  color: var(--color-text);                  /* Noir pour le contexte FAQ */
  margin: 0;
  padding: 0;
  border-bottom: none;
  border-left: none;
  padding-left: 0;
  display: inline;
  letter-spacing: 0;
}

details[open] summary h3 {
  color: var(--color-green-deep);            /* Vert quand la question est ouverte */
}

.summary-icon {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background-color: var(--color-green-pale);
  border: 1.5px solid var(--color-green-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  line-height: 1;
  color: var(--color-green-deep);
  font-weight: 700;
  transition: transform 0.25s ease, background-color 0.2s;
  user-select: none;
}

details[open] .summary-icon {
  background-color: var(--color-green-deep);
  color: var(--color-white);
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 0 22px;
  color: var(--color-text-muted);
  font-size: 0.96rem;
  line-height: 1.75;
  max-width: 720px;
}

/* --------------------------------------------------------------------------
   CTA FINAL
   -------------------------------------------------------------------------- */
.cta-final {
  background-color: var(--color-green-deep);
  color: var(--color-white);
  padding: var(--section-gap) 24px;
  text-align: center;
}

.cta-final h2 {
  color: var(--color-white);
  max-width: 680px;
  margin: 0 auto 1rem;
}

.cta-final__subtitle {
  font-style: italic;
  color: rgba(255, 255, 255, 0.82);
  margin-bottom: 2.4rem;
  font-size: 1rem;
}

.cta-final .btn {
  background-color: var(--color-white);
  color: var(--color-green-deep);
  border: none;
  min-width: 180px;
}

.cta-final .btn:hover {
  background-color: var(--color-green-pale);
  color: var(--color-green-deep);
}

.cta-final .btn-group {
  justify-content: center;
}

/* --------------------------------------------------------------------------
   DISCLAIMER
   -------------------------------------------------------------------------- */
.disclaimer {
  background-color: var(--color-bg-alt);
  border: 1px solid #e0dbd1;
  border-radius: 6px;
  padding: 20px 24px;
  margin: var(--section-gap) auto;
  max-width: var(--max-width);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* --------------------------------------------------------------------------
   FOOTER
   -------------------------------------------------------------------------- */
.footer {
  background-color: var(--color-bg);
  border-top: 1px solid #e8e3d8;
  padding: 32px 24px;
  text-align: center;
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.footer a {
  color: var(--color-text-muted);
  text-decoration: underline;
}

.footer a:hover {
  color: var(--color-green-deep);
}

/* --------------------------------------------------------------------------
   MENTIONS LÉGALES
   -------------------------------------------------------------------------- */
.legal-page {
  max-width: 720px;
  margin: 60px auto;
  padding: 0 24px 80px;
}

.legal-page h1 {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  margin-bottom: 2rem;
}

.legal-page h2 {
  font-size: 1.2rem;
  margin-top: 2rem;
  margin-bottom: 0.6rem;
}

/* ==========================================================================
   RESPONSIVE — MOBILE FIRST
   ========================================================================== */

/* Mobile < 480px */
@media (max-width: 479px) {
  :root {
    --section-gap: 52px;
  }

  h3 {
    font-size: 1.2rem;   /* reste lisible même sur petits écrans */
  }

  .cta-product-box {
    padding: 20px 18px;
  }

  .btn-group {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    text-align: center;
  }
}

/* Tablette 480–767px */
@media (min-width: 480px) and (max-width: 767px) {
  :root {
    --section-gap: 64px;
  }
}

/* Desktop ≥ 768px */
@media (min-width: 768px) {
  .navbar__hamburger {
    display: none;
  }

  .navbar__links {
    display: flex;
  }
}

/* Mobile only : hamburger visible, liens masqués */
@media (max-width: 767px) {
  .navbar__links {
    display: none;
  }

  .navbar__hamburger {
    display: flex;
  }

  h3 {
    display: block; /* Sur mobile, toujours en bloc pleine largeur */
  }
}

/* --------------------------------------------------------------------------
   ACCESSIBILITÉ — focus visible
   -------------------------------------------------------------------------- */
:focus-visible {
  outline: 2px solid var(--color-green-deep);
  outline-offset: 3px;
  border-radius: 2px;
}

/* --------------------------------------------------------------------------
   UTILITAIRES
   -------------------------------------------------------------------------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }