:root{
  /* --- Palette : la spiruline est une cyanobactérie bleu-vert.
     Le bleu vient de la phycocyanine (son pigment signature),
     le vert de la chlorophylle. Le sable rappelle les claies
     de séchage au soleil. Aucune terre cuite, aucun néon. --- */
  --forest: #12281c;
  --forest-2: #1b3a27;
  --algae: #2f6b4f;
  --chlorophyll: #5fae72;
  --chlorophyll-light: #a9d9ae;
  --phyco: #1c7c93;
  --phyco-bright: #23a7bf;
  --phyco-deep: #0f4e5c;
  --sand: #f6f1e0;
  --sand-2: #eee4c6;
  --ink: #16241a;
  --ink-soft: #3d4f3f;
  --paper: #fbf8ef;
  --white: #ffffff;

  --display: "Fraunces", Georgia, serif;
  --body: "Work Sans", -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;

  --radius: 18px;
  --radius-sm: 10px;
  --max: 1180px;
}

*,*::before,*::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *,*::before,*::after{ animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

body{
  margin:0;
  font-family: var(--body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

img{ max-width:100%; display:block; }
a{ color: inherit; }
.wrap{ max-width: var(--max); margin:0 auto; padding: 0 24px; }

h1,h2,h3{ font-family: var(--display); font-weight: 600; line-height: 1.08; margin: 0 0 .5em; color: var(--forest); }
h1{ font-size: clamp(2.4rem, 5vw, 4rem); font-weight: 600; letter-spacing: -0.01em; }
h2{ font-size: clamp(1.8rem, 3.4vw, 2.6rem); }
h3{ font-size: 1.25rem; font-weight: 600; }
p{ margin: 0 0 1em; color: var(--ink-soft); }

.eyebrow{
  font-family: var(--mono);
  font-size: .78rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--phyco-deep);
  display:inline-flex;
  align-items:center;
  gap:.5em;
  margin-bottom: 1em;
  font-weight: 500;
}
.eyebrow::before{
  content:"";
  width: 22px; height: 1px;
  background: var(--phyco-bright);
  display:inline-block;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5em;
  padding: .9em 1.6em;
  border-radius: 999px;
  font-family: var(--body);
  font-weight: 600;
  font-size: .98rem;
  text-decoration:none;
  border: 1px solid transparent;
  cursor:pointer;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.btn:focus-visible, a:focus-visible, button:focus-visible{
  outline: 3px solid var(--phyco-bright);
  outline-offset: 3px;
}
.btn-primary{
  background: var(--phyco);
  color: var(--white);
  box-shadow: 0 6px 20px -6px rgba(28,124,147,.55);
}
.btn-primary:hover{ transform: translateY(-2px); box-shadow: 0 10px 26px -6px rgba(28,124,147,.6); }
.btn-ghost{
  background: transparent;
  color: var(--forest);
  border-color: rgba(18,40,28,.25);
}
.btn-ghost:hover{ background: rgba(18,40,28,.06); }
.btn-light{
  background: var(--sand);
  color: var(--forest);
}
.btn-light:hover{ background: var(--sand-2); }

/* ---------- Header ---------- */
header.site{
  position: sticky; top:0; z-index: 50;
  background: rgba(251,248,239,.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(18,40,28,.08);
}
.nav{
  display:flex; align-items:center; justify-content:space-between;
  padding: 14px 0;
}
.brand{
  display:flex; align-items:center; gap:.6em;
  text-decoration:none;
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--forest);
}
.brand svg{ width:34px; height:34px; }
.nav-links{
  display:flex; align-items:center; gap: 28px;
  list-style:none; margin:0; padding:0;
}
.nav-links a{
  text-decoration:none;
  font-size: .95rem;
  font-weight: 500;
  color: var(--ink-soft);
  transition: color .15s ease;
}
.nav-links a:hover, .nav-links a[aria-current="page"]{ color: var(--phyco-deep); }
.nav-cta{ display:flex; align-items:center; gap:14px; }
.burger{ display:none; background:none; border:none; cursor:pointer; padding:8px; }
.burger span{ display:block; width:24px; height:2px; background: var(--forest); margin:5px 0; }

@media (max-width: 860px){
  .nav-links{
    position:fixed; inset: 64px 0 auto 0;
    background: var(--paper);
    flex-direction:column;
    align-items:flex-start;
    padding: 20px 24px 28px;
    gap: 18px;
    border-bottom: 1px solid rgba(18,40,28,.1);
    transform: translateY(-130%);
    transition: transform .25s ease;
  }
  .nav-links.open{ transform: translateY(0); }
  .burger{ display:block; }
  .nav-cta .btn-primary{ display:none; }
}

/* ---------- Hero ---------- */
.hero{
  position: relative;
  overflow: hidden;
  background: radial-gradient(120% 100% at 78% 0%, #1e4a34 0%, var(--forest) 55%, var(--forest-2) 100%);
  color: var(--white);
  padding: 84px 0 120px;
}
.hero-grid{
  display:grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 40px;
  align-items:center;
}
.hero h1{ color: var(--white); }
.hero h1 em{ font-style: normal; color: var(--chlorophyll-light); }
.hero .lede{
  color: rgba(255,255,255,.82);
  font-size: 1.15rem;
  max-width: 46ch;
}
.hero .eyebrow{ color: var(--chlorophyll-light); }
.hero .eyebrow::before{ background: var(--chlorophyll-light); }
.hero-actions{ display:flex; gap: 14px; flex-wrap:wrap; margin-top: 30px; }
.hero .btn-ghost{ color: var(--white); border-color: rgba(255,255,255,.35); }
.hero .btn-ghost:hover{ background: rgba(255,255,255,.1); }
.hero-fineprint{
  margin-top: 26px;
  font-family: var(--mono);
  font-size: .76rem;
  color: rgba(255,255,255,.55);
}

.hero-art{ position:relative; display:flex; align-items:center; justify-content:center; }
.spiral-wrap{ position:relative; width: 100%; max-width: 460px; aspect-ratio: 1/1; }
.spiral-wrap svg{ width:100%; height:100%; overflow: visible; }
.strand{
  fill:none;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.strand-a{ stroke: url(#gradPhyco); stroke-width: 5.5; }
.strand-b{ stroke: url(#gradChloro); stroke-width: 2.5; opacity:.75; }
@keyframes draw{
  from{ stroke-dashoffset: var(--len); }
  to{ stroke-dashoffset: 0; }
}
.strand-a{ stroke-dasharray: var(--len); animation: draw 2.6s ease forwards; }
.strand-b{ stroke-dasharray: var(--len2); animation: draw 3.2s .2s ease forwards; }
.hero-stat{
  position:absolute;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.18);
  backdrop-filter: blur(6px);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-family: var(--mono);
  font-size: .78rem;
  color: #fff;
}
.hero-stat b{ display:block; font-family: var(--display); font-size: 1.3rem; font-weight:600; color: var(--chlorophyll-light); }
.hs-1{ top: 4%; left: -6%; }
.hs-2{ bottom: 10%; right: -8%; }
@media (max-width: 860px){
  .hero-grid{ grid-template-columns: 1fr; }
  .hero-art{ order:-1; margin-bottom: 10px; }
  .hs-1,.hs-2{ display:none; }
}

/* ---------- Sections generic ---------- */
section{ padding: 96px 0; }
.section-head{ max-width: 640px; margin-bottom: 52px; }
.section-head.center{ margin-left:auto; margin-right:auto; text-align:center; }

.band-sand{ background: var(--sand); }
.band-forest{ background: var(--forest); color: rgba(255,255,255,.9); }
.band-forest h2, .band-forest h3{ color: #fff; }
.band-forest .eyebrow{ color: var(--chlorophyll-light); }
.band-forest .eyebrow::before{ background: var(--chlorophyll-light); }
.band-forest p{ color: rgba(255,255,255,.72); }

/* ---------- Intro / stat cards ---------- */
.intro-grid{ display:grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items:start; }
.stat-cards{ display:grid; gap:16px; }
.stat-card{
  background: var(--white);
  border: 1px solid rgba(18,40,28,.08);
  border-radius: var(--radius);
  padding: 22px 24px;
  display:flex; align-items:center; gap:18px;
}
.stat-card .num{
  font-family: var(--display); font-weight:700; font-size: 2rem; color: var(--phyco-deep);
  flex-shrink:0; min-width: 76px;
}
.stat-card h3{ margin:0 0 4px; font-size: 1.02rem; }
.stat-card p{ margin:0; font-size: .92rem; }
@media (max-width: 860px){ .intro-grid{ grid-template-columns: 1fr; gap:32px; } }

/* ---------- Benefit cards ---------- */
.cards{ display:grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.cards.three{ grid-template-columns: repeat(3, 1fr); }
.card{
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px 24px;
  border: 1px solid rgba(18,40,28,.08);
  transition: transform .18s ease, box-shadow .18s ease;
}
.card:hover{ transform: translateY(-4px); box-shadow: 0 16px 34px -18px rgba(18,40,28,.35); }
.card .ic{
  width: 46px; height:46px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--phyco), var(--algae));
  display:flex; align-items:center; justify-content:center;
  margin-bottom: 18px;
}
.card .ic svg{ width:22px; height:22px; stroke:#fff; }
@media (max-width: 980px){ .cards{ grid-template-columns: repeat(2,1fr); } }
@media (max-width: 620px){ .cards, .cards.three{ grid-template-columns: 1fr; } }

.disclaimer{
  margin-top: 44px;
  border-left: 3px solid var(--phyco-bright);
  background: rgba(28,124,147,.06);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 18px 22px;
  font-size: .9rem;
  color: var(--ink-soft);
}
.disclaimer strong{ color: var(--forest); }

/* ---------- Choisir list ---------- */
.choose-grid{ display:grid; grid-template-columns: repeat(2,1fr); gap: 18px 40px; }
.choose-item{ display:flex; gap: 16px; padding: 18px 0; border-bottom: 1px solid rgba(18,40,28,.08); }
.choose-item .n{
  font-family: var(--mono); font-size:.8rem; color: var(--phyco-deep);
  width: 30px; flex-shrink:0; padding-top:3px;
}
.choose-item h3{ margin-bottom:4px; }
.choose-item p{ margin:0; font-size: .93rem; }
@media (max-width: 760px){ .choose-grid{ grid-template-columns: 1fr; } }

/* ---------- Comparatif ---------- */
.disclosure{
  font-family: var(--mono); font-size: .78rem;
  color: var(--ink-soft);
  background: var(--sand-2);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  display:inline-block;
  margin-bottom: 42px;
}
.product-grid{ display:grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.product{
  background: var(--white);
  border-radius: var(--radius);
  border: 1px solid rgba(18,40,28,.08);
  overflow:hidden;
  display:flex; flex-direction:column;
}
.product.featured{ border: 2px solid var(--phyco); position:relative; }
.featured-tag{
  position:absolute; top:-1px; right:20px;
  background: var(--phyco); color:#fff;
  font-family: var(--mono); font-size:.72rem; letter-spacing:.06em;
  padding: 6px 12px; border-radius: 0 0 8px 8px;
}
.product-top{ padding: 26px 24px 0; }
.product-badges{ display:flex; gap:6px; flex-wrap:wrap; margin-bottom: 14px; }
.badge{
  font-family: var(--mono); font-size:.68rem; letter-spacing:.04em; text-transform:uppercase;
  background: var(--sand); color: var(--forest);
  padding: 4px 9px; border-radius: 999px;
}
.product h3{ font-size: 1.15rem; margin-bottom: 6px; }
.product .fmt{ font-family: var(--mono); font-size:.8rem; color: var(--phyco-deep); margin-bottom: 12px; }
.product p{ font-size: .92rem; }
.product-specs{ list-style:none; margin: 14px 0 0; padding: 14px 0 0; border-top:1px dashed rgba(18,40,28,.15); font-size:.85rem; }
.product-specs li{ display:flex; justify-content:space-between; padding: 5px 0; color: var(--ink-soft); }
.product-specs li span:last-child{ font-family: var(--mono); color: var(--forest); font-weight:500; }
.product-bottom{ padding: 20px 24px 26px; margin-top:auto; }
.product-bottom .btn{ width:100%; }
.price-note{ text-align:center; font-size:.78rem; color: var(--ink-soft); margin-top:10px; }
@media (max-width: 980px){ .product-grid{ grid-template-columns: 1fr 1fr; } }
@media (max-width: 620px){ .product-grid{ grid-template-columns: 1fr; } }

/* ---------- FAQ ---------- */
.faq-list{ max-width: 760px; margin: 0 auto; }
.faq-item{ border-bottom: 1px solid rgba(18,40,28,.12); }
.faq-q{
  width:100%; text-align:left; background:none; border:none; cursor:pointer;
  padding: 22px 0; display:flex; align-items:center; justify-content:space-between; gap: 20px;
  font-family: var(--display); font-size: 1.08rem; font-weight:600; color: var(--forest);
}
.faq-q .plus{
  width: 26px; height:26px; flex-shrink:0; border-radius:50%;
  border:1px solid rgba(18,40,28,.25);
  position:relative;
}
.faq-q .plus::before, .faq-q .plus::after{
  content:""; position:absolute; background: var(--forest);
  top:50%; left:50%; transform: translate(-50%,-50%);
}
.faq-q .plus::before{ width:10px; height:1.5px; }
.faq-q .plus::after{ width:1.5px; height:10px; transition: transform .2s ease; }
.faq-item.open .plus::after{ transform: translate(-50%,-50%) rotate(90deg) scaleY(0); }
.faq-a{ max-height:0; overflow:hidden; transition: max-height .28s ease; }
.faq-a p{ padding-bottom: 22px; margin:0; }
.faq-item.open .faq-a{ max-height: 320px; }

/* ---------- CTA band ---------- */
.cta-band{
  background: linear-gradient(120deg, var(--phyco-deep), var(--phyco) 60%, var(--algae));
  color:#fff; text-align:center; border-radius: 28px;
  padding: 64px 32px;
  max-width: var(--max); margin: 0 auto 0;
}
.cta-band h2{ color:#fff; }
.cta-band p{ color: rgba(255,255,255,.85); max-width: 52ch; margin: 0 auto 26px; }
.cta-band .btn-primary{ background:#fff; color: var(--phyco-deep); }
.cta-band .btn-primary:hover{ background: var(--sand); }

/* ---------- Footer ---------- */
footer{ background: var(--forest); color: rgba(255,255,255,.65); padding: 64px 0 30px; }
.foot-grid{ display:grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; margin-bottom: 46px; }
footer .brand{ color:#fff; margin-bottom: 14px; }
footer h4{ color:#fff; font-family: var(--body); font-size:.85rem; letter-spacing:.06em; text-transform:uppercase; margin: 0 0 16px; opacity:.7; }
footer ul{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap: 10px; }
footer a{ text-decoration:none; color: rgba(255,255,255,.65); font-size:.92rem; }
footer a:hover{ color:#fff; }
.foot-legal{
  border-top: 1px solid rgba(255,255,255,.12);
  padding-top: 26px;
  font-size: .8rem;
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px;
}
@media (max-width: 760px){ .foot-grid{ grid-template-columns: 1fr; } }

.skip-link{
  position:absolute; left:-999px; top:auto;
  background:#fff; color:#000; padding: 10px 16px; z-index:100;
}
.skip-link:focus{ left: 12px; top: 12px; }

/* ================= Blog : cards (home + index blog) ================= */
.blog-grid{ display:grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.post-card{
  background: var(--white);
  border-radius: var(--radius);
  border: 1px solid rgba(18,40,28,.08);
  overflow:hidden;
  display:flex; flex-direction:column;
  text-decoration:none;
  transition: transform .18s ease, box-shadow .18s ease;
}
.post-card:hover{ transform: translateY(-4px); box-shadow: 0 16px 34px -18px rgba(18,40,28,.35); }
.post-card .thumb{
  aspect-ratio: 16/10;
  background: linear-gradient(135deg, var(--phyco), var(--algae));
  display:flex; align-items:center; justify-content:center;
  position:relative;
  overflow:hidden;
}
.post-card .thumb img{
  width:100%; height:100%;
  object-fit: cover;
  display:block;
}
.post-card .thumb svg{ width:52px; height:52px; opacity:.9; }
.post-card .thumb .tag{
  position:absolute; top:14px; left:14px;
  font-family: var(--mono); font-size:.68rem; letter-spacing:.04em; text-transform:uppercase;
  background: rgba(255,255,255,.92); color: var(--forest);
  padding: 4px 10px; border-radius: 999px;
}
.post-card .body{ padding: 22px 22px 24px; display:flex; flex-direction:column; flex:1; }
.post-card .meta{
  font-family: var(--mono); font-size:.74rem; color: var(--phyco-deep);
  margin-bottom: 10px; letter-spacing:.02em;
}
.post-card h3{ font-size: 1.08rem; margin-bottom: 8px; }
.post-card p{ font-size: .9rem; margin-bottom: 14px; }
.post-card .read-more{
  margin-top:auto; font-family: var(--mono); font-size:.8rem; font-weight:500;
  color: var(--phyco); display:inline-flex; align-items:center; gap:.4em;
}
.blog-foot-link{ text-align:center; margin-top: 46px; }
@media (max-width: 980px){ .blog-grid{ grid-template-columns: repeat(2,1fr); } }
@media (max-width: 620px){ .blog-grid{ grid-template-columns: 1fr; } }

/* ================= Breadcrumb ================= */
.breadcrumb{
  font-family: var(--mono); font-size: .78rem; color: var(--ink-soft);
  padding: 22px 0 0;
}
.breadcrumb a{ text-decoration:none; color: var(--phyco-deep); }
.breadcrumb a:hover{ text-decoration:underline; }
.breadcrumb .sep{ margin: 0 .5em; opacity:.5; }

/* ================= Article page ================= */
.article-hero{ padding: 32px 0 56px; }
.article-hero .eyebrow{ color: var(--phyco-deep); }
.article-hero h1{ max-width: 20ch; }
.article-meta{
  display:flex; flex-wrap:wrap; gap: 18px; align-items:center;
  font-family: var(--mono); font-size: .82rem; color: var(--ink-soft);
  margin-top: 18px; padding-top: 18px; border-top: 1px solid rgba(18,40,28,.1);
}
.article-meta .author{ display:flex; align-items:center; gap:.6em; color: var(--forest); font-weight:500; }
.article-meta .avatar{
  width: 30px; height:30px; border-radius:50%;
  background: linear-gradient(135deg, var(--phyco), var(--algae));
  display:flex; align-items:center; justify-content:center;
  color:#fff; font-family: var(--display); font-size:.85rem; font-weight:600;
}

.article-cover{
  margin-top: 32px;
  border-radius: var(--radius);
  overflow: hidden;
}
.article-cover img{
  width:100%; display:block;
  aspect-ratio: 16/9;
  object-fit: cover;
}

.article-body{ padding: 0 0 40px; }
.article-layout{ display:grid; grid-template-columns: minmax(0,1fr) 280px; gap: 56px; align-items:start; }
.prose{ max-width: 68ch; }
.prose h2{ font-size: 1.7rem; margin-top: 1.6em; }
.prose h3{ font-size: 1.2rem; margin-top: 1.3em; }
.prose p, .prose li{ font-size: 1.02rem; }
.prose ul, .prose ol{ color: var(--ink-soft); padding-left: 1.3em; margin: 0 0 1em; }
.prose li{ margin-bottom: .5em; }
.prose strong{ color: var(--forest); }
.prose a{ color: var(--phyco-deep); text-decoration-color: rgba(28,124,147,.4); }
.prose blockquote{
  margin: 1.6em 0; padding: 4px 0 4px 20px;
  border-left: 3px solid var(--phyco-bright);
  font-family: var(--display); font-style: normal; font-size: 1.12rem; color: var(--forest);
}
.toc{
  background: var(--sand); border-radius: var(--radius);
  padding: 22px 22px 18px; position: sticky; top: 96px;
}
.toc h4{ margin:0 0 12px; font-family: var(--mono); font-size:.76rem; text-transform:uppercase; letter-spacing:.08em; color: var(--phyco-deep); }
.toc ol{ margin:0; padding: 0 0 0 1.1em; }
.toc li{ margin-bottom: 8px; font-size: .88rem; }
.toc a{ text-decoration:none; color: var(--ink-soft); }
.toc a:hover{ color: var(--phyco-deep); }
.toc-cta{ margin-top:16px; display:block; width:100%; text-align:center; }
@media (max-width: 980px){
  .article-layout{ grid-template-columns: 1fr; }
  .toc{ position:static; }
}

.related-grid{ display:grid; grid-template-columns: repeat(3,1fr); gap: 22px; }
@media (max-width: 980px){ .related-grid{ grid-template-columns: repeat(2,1fr); } }
@media (max-width: 620px){ .related-grid{ grid-template-columns: 1fr; } }

.author-box{
  display:flex; gap:18px; align-items:flex-start;
  background: var(--white); border: 1px solid rgba(18,40,28,.08);
  border-radius: var(--radius); padding: 24px; margin: 48px 0 0;
}
.author-box .avatar{ width:52px; height:52px; font-size:1.1rem; flex-shrink:0; }
.author-box h4{ margin:0 0 4px; font-family: var(--display); color: var(--forest); font-size:1.02rem; }
.author-box p{ margin:0; font-size:.88rem; }