/* ==========================================================================
   ADAMANTIA — Design System
   Palette dérivée du logo :
     Vert herbe    #37582A   Bleu diamant  #64A9C5
     Gris sidéral  #091117   Gris pierre   #2C3742
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Tokens
   -------------------------------------------------------------------------- */
:root {
  /* Couleurs sources */
  --grass:          #37582A;
  --diamond:        #64A9C5;
  --sidereal:       #091117;
  --stone:          #2C3742;

  /* Dérivées — vert */
  --grass-lite:     #7FBF5A;
  --grass-glow:     rgba(127, 191, 90, .35);
  --grass-dim:      rgba(55, 88, 42, .28);

  /* Dérivées — bleu diamant */
  --diamond-lite:   #A8DCEF;
  --diamond-deep:   #2E7593;
  --diamond-glow:   rgba(100, 169, 197, .40);
  --diamond-dim:    rgba(100, 169, 197, .12);

  /* Surfaces */
  --bg:             #091117;
  --bg-deep:        #050B0F;
  --surface:        #0D1720;
  --surface-2:      #111E29;
  --surface-glass:  rgba(17, 30, 41, .62);

  /* Bordures */
  --line:           rgba(44, 55, 66, .85);
  --line-soft:      rgba(44, 55, 66, .45);
  --line-lit:       rgba(100, 169, 197, .32);

  /* Texte */
  --ink:            #E8F1F5;
  --ink-soft:       #A3B4BF;
  --ink-mute:       #6B7F8C;

  /* Typo */
  --font-display: "Space Grotesk", "SF Pro Display", -apple-system, BlinkMacSystemFont,
                  "Segoe UI Variable Display", "Segoe UI", system-ui, sans-serif;
  --font-body:    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-mono:    ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Code", Menlo, monospace;

  /* Rythme */
  --wrap: 1220px;
  --gut: clamp(1.25rem, 4vw, 3rem);
  --radius: 18px;
  --radius-sm: 11px;

  /* Mouvement */
  --ease-out: cubic-bezier(.16, 1, .3, 1);
  --ease-io:  cubic-bezier(.65, 0, .35, 1);
  --t-fast: .18s;
  --t-mid: .34s;
  --t-slow: .6s;

  /* Élévation */
  --shadow-1: 0 2px 12px rgba(0,0,0,.45);
  --shadow-2: 0 18px 48px -12px rgba(0,0,0,.72);
  --shadow-lit: 0 0 0 1px var(--line-lit), 0 18px 56px -18px var(--diamond-glow);
}

/* --------------------------------------------------------------------------
   2. Reset & base
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

/* `display` posé par une classe l'emporterait sinon sur [hidden]. */
[hidden] { display: none !important; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
}

body {
  margin: 0;
  min-height: 100svh;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  letter-spacing: -.005em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  isolation: isolate;
}

/* Le décor reste au fond, le contenu passe systématiquement au-dessus. */
main, .footer { position: relative; z-index: 1; }

body.is-locked { overflow: hidden; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.06;
  letter-spacing: -.035em;
  margin: 0;
  text-wrap: balance;
}

p { margin: 0; text-wrap: pretty; }

a { color: var(--diamond); text-decoration: none; transition: color var(--t-fast) var(--ease-out); }
a:hover { color: var(--diamond-lite); }

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

button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

ul, ol { margin: 0; padding: 0; }

::selection { background: var(--diamond); color: var(--bg-deep); }

:focus-visible {
  outline: 2px solid var(--diamond);
  outline-offset: 3px;
  border-radius: 4px;
}

/* Barre de défilement */
::-webkit-scrollbar { width: 11px; height: 11px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb {
  background: var(--stone);
  border-radius: 99px;
  border: 3px solid var(--bg-deep);
}
::-webkit-scrollbar-thumb:hover { background: var(--diamond-deep); }

/* --------------------------------------------------------------------------
   3. Layout
   -------------------------------------------------------------------------- */
.wrap {
  width: min(100% - (var(--gut) * 2), var(--wrap));
  margin-inline: auto;
}

.section { padding-block: clamp(4.5rem, 10vw, 8.5rem); position: relative; }
.section--tight { padding-block: clamp(3rem, 6vw, 5rem); }

.skip-link {
  position: absolute;
  left: 50%;
  top: -100px;
  transform: translateX(-50%);
  z-index: 200;
  background: var(--diamond);
  color: var(--bg-deep);
  padding: .7rem 1.4rem;
  border-radius: 0 0 12px 12px;
  font-weight: 700;
  transition: top var(--t-mid) var(--ease-out);
}
.skip-link:focus { top: 0; color: var(--bg-deep); }

/* --------------------------------------------------------------------------
   4. Décor de fond — champ d'étoiles, aurores, grille
   -------------------------------------------------------------------------- */
/* Les aurores sont peintes en dégradés radiaux plutôt qu'avec `filter: blur()` :
   même rendu diffus, sans créer de calque composité géant à rastériser. */
.bg-fx {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(62vw 62vw at 86% -10%, rgba(100, 169, 197, .22), transparent 60%),
    radial-gradient(54vw 54vw at 4% 108%,  rgba(127, 191, 90,  .16), transparent 60%),
    radial-gradient(40vw 40vw at 50% 42%,  rgba(46, 117, 147,  .10), transparent 62%),
    var(--bg);
}

#stars { position: absolute; inset: 0; width: 100%; height: 100%; opacity: .85; }

/* Grille technique très discrète */
.bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(100,169,197,.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(100,169,197,.055) 1px, transparent 1px);
  background-size: 68px 68px;
  mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 20%, transparent 78%);
}

/* --------------------------------------------------------------------------
   5. En-tête / navigation
   -------------------------------------------------------------------------- */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  view-transition-name: site-header;
  transition: background var(--t-mid) var(--ease-out),
              border-color var(--t-mid) var(--ease-out),
              backdrop-filter var(--t-mid) var(--ease-out);
  border-bottom: 1px solid transparent;
}
.header.is-stuck {
  background: rgba(9, 17, 23, .78);
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  border-bottom-color: var(--line-soft);
}

.header__inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  height: 74px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: .04em;
  color: var(--ink);
  text-transform: uppercase;
  view-transition-name: site-brand;
}
.brand:hover { color: var(--ink); }
.brand__mark {
  width: 38px; height: 38px;
  border-radius: 10px;
  object-fit: cover;
  border: 1px solid var(--line-lit);
  box-shadow: 0 0 18px -4px var(--diamond-glow);
  transition: transform var(--t-mid) var(--ease-out), box-shadow var(--t-mid) var(--ease-out);
}
.brand:hover .brand__mark {
  transform: rotate(-6deg) scale(1.07);
  box-shadow: 0 0 26px -2px var(--diamond-glow);
}
.brand__text > span {
  display: block;
  font-family: var(--font-mono);
  font-size: .56rem;
  letter-spacing: .34em;
  color: var(--diamond);
  font-weight: 500;
  margin-top: -2px;
}

.nav { margin-left: auto; }
.nav__list { display: flex; align-items: center; gap: .25rem; list-style: none; }

.nav__link {
  position: relative;
  display: block;
  padding: .55rem .9rem;
  border-radius: 10px;
  font-size: .9rem;
  font-weight: 550;
  color: var(--ink-soft);
  transition: color var(--t-fast) var(--ease-out), background var(--t-fast) var(--ease-out);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 50%; bottom: 4px;
  width: 0; height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--diamond), var(--grass-lite));
  transform: translateX(-50%);
  transition: width var(--t-mid) var(--ease-out);
}
.nav__link:hover { color: var(--ink); background: rgba(100,169,197,.07); }
.nav__link:hover::after { width: 46%; }
.nav__link[aria-current="page"] { color: var(--ink); }
.nav__link[aria-current="page"]::after { width: 46%; }

.header__cta { display: inline-flex; align-items: center; gap: .6rem; }

.burger {
  display: none;
  width: 44px; height: 44px;
  border-radius: 11px;
  border: 1px solid var(--line);
  background: var(--surface-glass);
  place-items: center;
  transition: border-color var(--t-fast) var(--ease-out), background var(--t-fast) var(--ease-out);
}
.burger:hover { border-color: var(--line-lit); }
.burger span {
  display: block;
  width: 19px; height: 2px;
  border-radius: 2px;
  background: var(--ink);
  transition: transform var(--t-mid) var(--ease-out), opacity var(--t-fast) var(--ease-out);
}
.burger span + span { margin-top: 5px; }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; transform: scaleX(.3); }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Tiroir mobile */
.drawer {
  position: fixed;
  inset: 74px 0 0 0;
  z-index: 99;
  background: rgba(5, 11, 15, .96);
  backdrop-filter: blur(22px);
  -webkit-backdrop-filter: blur(22px);
  padding: 2rem var(--gut) 3rem;
  overflow-y: auto;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-12px);
  transition: opacity var(--t-mid) var(--ease-out),
              transform var(--t-mid) var(--ease-out),
              visibility var(--t-mid);
}
.drawer.is-open { opacity: 1; visibility: visible; transform: none; }

.drawer__list { list-style: none; display: grid; gap: .3rem; }
.drawer__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem .25rem;
  font-family: var(--font-display);
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: -.03em;
  color: var(--ink);
  border-bottom: 1px solid var(--line-soft);
  opacity: 0;
  transform: translateY(14px);
}
.drawer.is-open .drawer__link {
  animation: drawer-in .5s var(--ease-out) forwards;
  animation-delay: calc(var(--i, 0) * 55ms + 80ms);
}
.drawer__link span { font-family: var(--font-mono); font-size: .7rem; color: var(--diamond); }
@keyframes drawer-in { to { opacity: 1; transform: none; } }

.drawer__foot { margin-top: 2.25rem; display: grid; gap: .8rem; }

/* --------------------------------------------------------------------------
   6. Boutons
   -------------------------------------------------------------------------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .6rem;
  padding: .85rem 1.5rem;
  border-radius: 12px;
  font-family: var(--font-display);
  font-size: .93rem;
  font-weight: 700;
  letter-spacing: -.01em;
  white-space: nowrap;
  overflow: hidden;
  isolation: isolate;
  transition: transform var(--t-fast) var(--ease-out),
              box-shadow var(--t-mid) var(--ease-out),
              border-color var(--t-fast) var(--ease-out),
              background var(--t-fast) var(--ease-out),
              color var(--t-fast) var(--ease-out);
}
.btn:active { transform: translateY(1px) scale(.985); }

/* Balayage lumineux au survol */
.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(110deg, transparent 30%, rgba(255,255,255,.22) 50%, transparent 70%);
  transform: translateX(-130%);
  transition: transform .75s var(--ease-out);
}
.btn:hover::before { transform: translateX(130%); }

.btn--primary {
  background: linear-gradient(135deg, var(--diamond) 0%, var(--diamond-deep) 100%);
  color: #051016;
  box-shadow: 0 10px 30px -10px var(--diamond-glow), inset 0 1px 0 rgba(255,255,255,.28);
}
.btn--primary:hover {
  color: #051016;
  transform: translateY(-2px);
  box-shadow: 0 18px 44px -12px var(--diamond-glow), inset 0 1px 0 rgba(255,255,255,.36);
}

.btn--grass {
  background: linear-gradient(135deg, var(--grass-lite) 0%, var(--grass) 100%);
  color: #06120A;
  box-shadow: 0 10px 30px -10px var(--grass-glow), inset 0 1px 0 rgba(255,255,255,.24);
}
.btn--grass:hover { color: #06120A; transform: translateY(-2px); box-shadow: 0 18px 44px -12px var(--grass-glow); }

.btn--ghost {
  border: 1px solid var(--line);
  background: var(--surface-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--ink);
}
.btn--ghost:hover {
  color: var(--ink);
  border-color: var(--line-lit);
  background: rgba(100,169,197,.10);
  transform: translateY(-2px);
}

.btn--sm { padding: .58rem 1.05rem; font-size: .84rem; border-radius: 10px; }
.btn--lg { padding: 1.05rem 2rem; font-size: 1.02rem; border-radius: 14px; }
.btn--block { width: 100%; }
.btn[aria-disabled="true"] { opacity: .5; pointer-events: none; }

.btn__icon { width: 17px; height: 17px; flex: none; }

/* --------------------------------------------------------------------------
   7. Éléments d'accent
   -------------------------------------------------------------------------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--diamond);
}
.eyebrow::before {
  content: "";
  width: 26px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--diamond));
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .38rem .85rem;
  border-radius: 99px;
  border: 1px solid var(--line-lit);
  background: var(--diamond-dim);
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--diamond-lite);
}
.chip--grass {
  border-color: rgba(127,191,90,.3);
  background: var(--grass-dim);
  color: var(--grass-lite);
}

.pulse {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--grass-lite);
  box-shadow: 0 0 0 0 var(--grass-glow);
  animation: pulse 2.4s var(--ease-io) infinite;
  flex: none;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(127,191,90,.55); }
  70%  { box-shadow: 0 0 0 9px rgba(127,191,90,0); }
  100% { box-shadow: 0 0 0 0 rgba(127,191,90,0); }
}

.grad-text {
  background: linear-gradient(100deg, var(--diamond-lite) 0%, var(--diamond) 38%, var(--grass-lite) 100%);
  background-size: 220% auto;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: grad-pan 9s linear infinite;
}
@keyframes grad-pan {
  to { background-position: 220% center; }
}

.rule {
  height: 1px;
  border: 0;
  margin: 0;
  background: linear-gradient(90deg, transparent, var(--line), transparent);
}

/* --------------------------------------------------------------------------
   8. En-tête de section
   -------------------------------------------------------------------------- */
.sec-head { max-width: 660px; margin-bottom: clamp(2.5rem, 5vw, 4rem); }
.sec-head--center { margin-inline: auto; text-align: center; }
.sec-head--center .eyebrow::before { display: none; }
.sec-head__title {
  font-size: clamp(2rem, 4.6vw, 3.25rem);
  margin: 1rem 0 .9rem;
}
.sec-head__lede { color: var(--ink-soft); font-size: 1.06rem; }

/* --------------------------------------------------------------------------
   9. Héros
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-top: 74px;
  overflow: hidden;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  align-items: center;
  gap: clamp(2rem, 5vw, 4.5rem);
  padding-block: clamp(3rem, 8vh, 6rem);
}

.hero__title {
  font-size: clamp(2.9rem, 8.2vw, 6.1rem);
  margin: 1.4rem 0 1.5rem;
}
.hero__title em { font-style: normal; display: block; }

.hero__lede {
  max-width: 46ch;
  font-size: clamp(1.02rem, 1.5vw, 1.16rem);
  color: var(--ink-soft);
  margin-bottom: 2.2rem;
}

.hero__actions { display: flex; flex-wrap: wrap; gap: .85rem; margin-bottom: 2.4rem; }

.hero__meta { display: flex; flex-wrap: wrap; gap: .7rem; }

/* Visuel : logo flottant + anneaux */
.hero__visual {
  position: relative;
  display: grid;
  place-items: center;
  aspect-ratio: 1;
}
.hero__logo {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 480px;
  border-radius: 26px;
  animation: float 7s var(--ease-io) infinite alternate;
  filter: drop-shadow(0 30px 60px rgba(0,0,0,.6));
  mask-image: radial-gradient(circle at 50% 46%, #000 58%, transparent 76%);
  -webkit-mask-image: radial-gradient(circle at 50% 46%, #000 58%, transparent 76%);
}
@keyframes float {
  from { transform: translateY(-10px) rotate(-.6deg); }
  to   { transform: translateY(12px) rotate(.6deg); }
}

.hero__ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--line-lit);
  opacity: .5;
}
.hero__ring--1 { inset: 6%;  animation: spin 34s linear infinite; border-style: dashed; }
.hero__ring--2 { inset: 16%; animation: spin 26s linear infinite reverse; }
.hero__ring--3 {
  inset: -4%;
  border-color: rgba(127,191,90,.22);
  animation: spin 52s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.hero__halo {
  position: absolute;
  inset: 12%;
  border-radius: 50%;
  background: radial-gradient(circle, var(--diamond-glow), transparent 62%);
  filter: blur(50px);
  animation: breathe 6s var(--ease-io) infinite alternate;
}
@keyframes breathe {
  from { opacity: .55; transform: scale(.94); }
  to   { opacity: .95; transform: scale(1.08); }
}

/* Indicateur de défilement */
.scroll-cue {
  position: absolute;
  left: 50%; bottom: 2rem;
  transform: translateX(-50%);
  display: grid;
  justify-items: center;
  gap: .6rem;
  font-family: var(--font-mono);
  font-size: .62rem;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.scroll-cue__bar {
  width: 1px; height: 42px;
  background: linear-gradient(to bottom, var(--diamond), transparent);
  animation: cue 2.2s var(--ease-io) infinite;
  transform-origin: top;
}
@keyframes cue {
  0%   { transform: scaleY(0); opacity: 0; }
  40%  { transform: scaleY(1); opacity: 1; }
  100% { transform: scaleY(1) translateY(42px); opacity: 0; }
}

/* --------------------------------------------------------------------------
   10. Cartes
   -------------------------------------------------------------------------- */
.card {
  position: relative;
  padding: 1.9rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(100,169,197,.045), transparent 42%),
    var(--surface);
  overflow: hidden;
  transition: transform var(--t-mid) var(--ease-out),
              border-color var(--t-mid) var(--ease-out),
              box-shadow var(--t-mid) var(--ease-out);
}

/* Lueur qui suit le curseur */
.card::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  opacity: 0;
  transition: opacity var(--t-mid) var(--ease-out);
  background: radial-gradient(320px circle at var(--mx, 50%) var(--my, 0%),
              rgba(100,169,197,.16), transparent 62%);
  pointer-events: none;
}
.card:hover::before { opacity: 1; }
.card:hover {
  transform: translateY(-5px);
  border-color: var(--line-lit);
  box-shadow: var(--shadow-2), 0 0 44px -20px var(--diamond-glow);
}

.card__icon {
  display: grid;
  place-items: center;
  width: 50px; height: 50px;
  margin-bottom: 1.25rem;
  border-radius: 13px;
  border: 1px solid var(--line-lit);
  background: linear-gradient(145deg, rgba(100,169,197,.16), rgba(100,169,197,.03));
  color: var(--diamond);
  transition: transform var(--t-mid) var(--ease-out), color var(--t-mid) var(--ease-out);
}
.card:hover .card__icon { transform: scale(1.08) rotate(-5deg); color: var(--diamond-lite); }
.card__icon svg { width: 23px; height: 23px; }
.card__icon--grass {
  border-color: rgba(127,191,90,.3);
  background: linear-gradient(145deg, rgba(127,191,90,.16), rgba(127,191,90,.03));
  color: var(--grass-lite);
}

.card__title { font-size: 1.22rem; margin-bottom: .6rem; }
.card__text { color: var(--ink-soft); font-size: .95rem; }

.grid { display: grid; gap: 1.25rem; }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(330px, 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }

/* --------------------------------------------------------------------------
   11. Étapes d'installation
   -------------------------------------------------------------------------- */
.tabs {
  position: relative;
  display: inline-flex;
  gap: .3rem;
  padding: .32rem;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--surface);
  margin-bottom: 2.6rem;
}
.tab {
  position: relative;
  z-index: 1;
  padding: .62rem 1.35rem;
  border-radius: 11px;
  font-family: var(--font-display);
  font-size: .9rem;
  font-weight: 650;
  color: var(--ink-mute);
  transition: color var(--t-mid) var(--ease-out);
}
.tab:hover { color: var(--ink-soft); }
.tab[aria-selected="true"] { color: #051016; }

/* Pastille coulissante, positionnée en JS via getBoundingClientRect */
.tab__bg {
  position: absolute;
  top: 0; left: 0;
  z-index: 0;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--diamond), var(--diamond-deep));
  box-shadow: 0 6px 20px -8px var(--diamond-glow);
  transition: transform var(--t-mid) var(--ease-out), width var(--t-mid) var(--ease-out);
}

.steps { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); counter-reset: step; }

.step {
  position: relative;
  padding: 2.1rem 1.8rem 1.8rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--surface);
  transition: transform var(--t-mid) var(--ease-out),
              border-color var(--t-mid) var(--ease-out),
              box-shadow var(--t-mid) var(--ease-out);
}
.step:hover {
  transform: translateY(-5px);
  border-color: var(--line-lit);
  box-shadow: var(--shadow-2);
}
.step__num {
  position: absolute;
  top: -18px; left: 1.8rem;
  display: grid;
  place-items: center;
  width: 40px; height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--diamond), var(--diamond-deep));
  color: #051016;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  box-shadow: 0 8px 22px -8px var(--diamond-glow);
}
.step__title { font-size: 1.14rem; margin: .55rem 0 .55rem; }
.step__text { color: var(--ink-soft); font-size: .93rem; }

.panel[hidden] { display: none; }
.panel { animation: panel-in .45s var(--ease-out); }
@keyframes panel-in {
  from { opacity: 0; transform: translateY(14px); }
}

/* --------------------------------------------------------------------------
   12. Bloc adresse serveur
   -------------------------------------------------------------------------- */
.ipbox {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  padding: 1.1rem 1.1rem 1.1rem 1.5rem;
  border-radius: 16px;
  border: 1px solid var(--line-lit);
  background: linear-gradient(120deg, rgba(100,169,197,.10), rgba(17,30,41,.7));
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.ipbox__label {
  font-family: var(--font-mono);
  font-size: .62rem;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--ink-mute);
  display: block;
  margin-bottom: .15rem;
}
.ipbox__value {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--diamond-lite);
  letter-spacing: .02em;
}
.ipbox .btn { margin-left: auto; }

/* --------------------------------------------------------------------------
   13. Articles
   -------------------------------------------------------------------------- */
.post {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--surface);
  overflow: hidden;
  transition: transform var(--t-mid) var(--ease-out),
              border-color var(--t-mid) var(--ease-out),
              box-shadow var(--t-mid) var(--ease-out);
}
.post:hover {
  transform: translateY(-6px);
  border-color: var(--line-lit);
  box-shadow: var(--shadow-2), 0 0 48px -22px var(--diamond-glow);
}

.post__media {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: linear-gradient(140deg, var(--surface-2), var(--bg-deep));
  border-bottom: 1px solid var(--line-soft);
}
.post__media img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .7s var(--ease-out), filter var(--t-mid) var(--ease-out);
}
.post:hover .post__media img { transform: scale(1.06); }
.post__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(9,17,23,.85), transparent 55%);
}
.post__tag {
  position: absolute;
  z-index: 2;
  top: .9rem; left: .9rem;
}

.post__body { padding: 1.5rem; display: flex; flex-direction: column; flex: 1; gap: .7rem; }
.post__date {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.post__title { font-size: 1.16rem; line-height: 1.28; }
.post__title a { color: var(--ink); }
.post__title a:hover { color: var(--diamond-lite); }
.post__excerpt { color: var(--ink-soft); font-size: .93rem; flex: 1; }
.post__more {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  font-family: var(--font-display);
  font-weight: 650;
  font-size: .88rem;
  color: var(--diamond);
}
.post__more svg { width: 15px; height: 15px; transition: transform var(--t-mid) var(--ease-out); }
.post:hover .post__more svg { transform: translateX(4px); }

.post[hidden] { display: none; }

/* Filtres */
.filters { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 2.25rem; }
.filter {
  padding: .5rem 1.05rem;
  border-radius: 99px;
  border: 1px solid var(--line);
  background: var(--surface);
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-mute);
  transition: all var(--t-fast) var(--ease-out);
}
.filter:hover { color: var(--ink); border-color: var(--line-lit); }
.filter[aria-pressed="true"] {
  color: #051016;
  background: linear-gradient(135deg, var(--diamond), var(--diamond-deep));
  border-color: transparent;
  box-shadow: 0 6px 20px -8px var(--diamond-glow);
}

/* --------------------------------------------------------------------------
   14. Page d'article
   -------------------------------------------------------------------------- */
.page-head {
  padding-top: calc(74px + clamp(3rem, 8vw, 6rem));
  padding-bottom: clamp(2rem, 4vw, 3rem);
}
.page-head__title { font-size: clamp(2.2rem, 5.6vw, 3.9rem); margin: 1.1rem 0 1rem; }
.page-head__lede { color: var(--ink-soft); font-size: 1.08rem; max-width: 62ch; }

.prose { max-width: 74ch; margin-inline: auto; font-size: 1.03rem; color: var(--ink-soft); }
.prose > * + * { margin-top: 1.35rem; }
.prose h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--ink);
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line-soft);
}
.prose h3 { font-size: 1.24rem; color: var(--ink); margin-top: 2.25rem; }
.prose strong { color: var(--ink); font-weight: 650; }
.prose ul, .prose ol { padding-left: 1.3rem; display: grid; gap: .6rem; }
.prose li::marker { color: var(--diamond); }
.prose blockquote {
  margin-inline: 0;
  padding: 1.25rem 1.5rem;
  border-left: 2px solid var(--diamond);
  border-radius: 0 12px 12px 0;
  background: var(--diamond-dim);
  color: var(--ink);
}
.prose code {
  font-family: var(--font-mono);
  font-size: .88em;
  padding: .16em .45em;
  border-radius: 6px;
  background: var(--surface-2);
  border: 1px solid var(--line-soft);
  color: var(--diamond-lite);
}
.prose img { border-radius: var(--radius); border: 1px solid var(--line); }
.prose hr { height: 1px; border: 0; background: var(--line-soft); margin-block: 2.5rem; }

.post-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
  max-width: 74ch;
  margin: 3.5rem auto 0;
  padding-top: 2rem;
  border-top: 1px solid var(--line-soft);
}

/* --------------------------------------------------------------------------
   15. Accordéon (FAQ / support)
   -------------------------------------------------------------------------- */
.acc { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); overflow: hidden; }
.acc + .acc { margin-top: .8rem; }
.acc__btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  padding: 1.2rem 1.5rem;
  text-align: left;
  font-family: var(--font-display);
  font-weight: 650;
  font-size: 1.02rem;
  color: var(--ink);
  transition: background var(--t-fast) var(--ease-out);
}
.acc__btn:hover { background: rgba(100,169,197,.05); }
.acc__sign {
  position: relative;
  flex: none;
  width: 22px; height: 22px;
  border-radius: 7px;
  border: 1px solid var(--line-lit);
  transition: transform var(--t-mid) var(--ease-out), background var(--t-mid) var(--ease-out);
}
.acc__sign::before, .acc__sign::after {
  content: "";
  position: absolute;
  inset: 50% 5px auto 5px;
  height: 1.5px;
  background: var(--diamond);
  transform: translateY(-50%);
  transition: transform var(--t-mid) var(--ease-out);
}
.acc__sign::after { transform: translateY(-50%) rotate(90deg); }
.acc__btn[aria-expanded="true"] .acc__sign { background: var(--diamond-dim); transform: rotate(180deg); }
.acc__btn[aria-expanded="true"] .acc__sign::after { transform: translateY(-50%) rotate(0deg); }

.acc__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--t-mid) var(--ease-out);
}
.acc__panel > div { overflow: hidden; }
.acc__panel.is-open { grid-template-rows: 1fr; }
.acc__inner { padding: 0 1.5rem 1.4rem; color: var(--ink-soft); font-size: .96rem; }

/* --------------------------------------------------------------------------
   16. Appel à l'action (bandeau)
   -------------------------------------------------------------------------- */
.cta-band {
  position: relative;
  padding: clamp(2.75rem, 6vw, 4.5rem);
  border-radius: 26px;
  border: 1px solid var(--line-lit);
  background:
    radial-gradient(700px circle at 15% 0%, rgba(100,169,197,.16), transparent 62%),
    radial-gradient(600px circle at 88% 100%, rgba(127,191,90,.13), transparent 62%),
    var(--surface);
  overflow: hidden;
  text-align: center;
}
.cta-band__title { font-size: clamp(1.85rem, 4.2vw, 2.9rem); margin: 1rem auto .9rem; max-width: 18ch; }
.cta-band__lede { color: var(--ink-soft); max-width: 52ch; margin: 0 auto 2rem; }
.cta-band__actions { display: flex; flex-wrap: wrap; gap: .8rem; justify-content: center; }

/* --------------------------------------------------------------------------
   17. Pied de page
   -------------------------------------------------------------------------- */
.footer {
  margin-top: clamp(4rem, 8vw, 7rem);
  border-top: 1px solid var(--line-soft);
  background: linear-gradient(to bottom, transparent, rgba(5,11,15,.7));
  padding-block: clamp(3rem, 6vw, 4.5rem) 2rem;
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 2.5rem;
  margin-bottom: 3rem;
}
.footer__about { max-width: 34ch; color: var(--ink-soft); font-size: .93rem; margin-top: 1.1rem; }
.footer__h {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 1.1rem;
}
.footer__list { list-style: none; display: grid; gap: .65rem; }
.footer__list a { color: var(--ink-soft); font-size: .93rem; }
.footer__list a:hover { color: var(--diamond-lite); }

.socials { display: flex; gap: .55rem; margin-top: 1.5rem; }
.social {
  display: grid;
  place-items: center;
  width: 40px; height: 40px;
  border-radius: 11px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink-soft);
  transition: all var(--t-mid) var(--ease-out);
}
.social:hover {
  color: var(--diamond-lite);
  border-color: var(--line-lit);
  background: var(--diamond-dim);
  transform: translateY(-3px);
}
.social svg { width: 18px; height: 18px; }

.footer__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid var(--line-soft);
  font-size: .84rem;
  color: var(--ink-mute);
}
.footer__legal { display: flex; flex-wrap: wrap; gap: 1.25rem; list-style: none; }
.footer__legal a { color: var(--ink-mute); }
.footer__legal a:hover { color: var(--diamond); }

.disclaimer {
  margin-top: 1.25rem;
  font-size: .76rem;
  color: var(--ink-mute);
  opacity: .8;
  max-width: 78ch;
}

/* --------------------------------------------------------------------------
   18. Révélation au défilement
   -------------------------------------------------------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .8s var(--ease-out), transform .8s var(--ease-out);
  transition-delay: calc(var(--i, 0) * 80ms);
  will-change: opacity, transform;
}
[data-reveal="left"]  { transform: translateX(-30px); }
[data-reveal="right"] { transform: translateX(30px); }
[data-reveal="scale"] { transform: scale(.94); }
[data-reveal].is-in { opacity: 1; transform: none; }

/* --------------------------------------------------------------------------
   19. Transitions de page (View Transitions API)
   -------------------------------------------------------------------------- */
@view-transition { navigation: auto; }

::view-transition-old(root) {
  animation: vt-out .3s var(--ease-io) both;
}
::view-transition-new(root) {
  animation: vt-in .52s var(--ease-out) both;
}
@keyframes vt-out {
  to { opacity: 0; transform: translateY(-14px) scale(.985); filter: blur(3px); }
}
@keyframes vt-in {
  from { opacity: 0; transform: translateY(22px) scale(.99); filter: blur(4px); }
}

::view-transition-group(site-header),
::view-transition-group(site-brand) { animation-duration: .4s; }
::view-transition-old(site-header),
::view-transition-new(site-header) { animation: none; mix-blend-mode: normal; }

/* Repli : fondu au chargement pour les navigateurs sans View Transitions */
@supports not (view-transition-name: none) {
  body { animation: page-fade .5s var(--ease-out) both; }
  @keyframes page-fade {
    from { opacity: 0; transform: translateY(12px); }
  }
}

/* --------------------------------------------------------------------------
   20. Utilitaires
   -------------------------------------------------------------------------- */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}
.center { text-align: center; }
.mt-lg { margin-top: 3rem; }
.stack { display: grid; gap: 1rem; }
.flex-row { display: flex; flex-wrap: wrap; gap: .8rem; align-items: center; }

/* --------------------------------------------------------------------------
   21. Adaptatif
   -------------------------------------------------------------------------- */
@media (max-width: 1080px) {
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
}

@media (max-width: 900px) {
  .nav, .header__cta .btn--ghost { display: none; }
  .burger { display: grid; margin-left: auto; }
  .header__cta { margin-left: 0; }

  .hero { min-height: auto; padding-top: 74px; }
  .hero__grid { grid-template-columns: 1fr; text-align: left; }
  .hero__visual { order: -1; max-width: 340px; margin-inline: auto; }
  .hero__lede { max-width: none; }
  .scroll-cue { display: none; }
}

@media (max-width: 620px) {
  :root { --radius: 15px; }
  .footer__grid { grid-template-columns: 1fr; }
  .footer__bar { flex-direction: column; align-items: flex-start; }
  .ipbox { flex-direction: column; align-items: stretch; text-align: center; }
  .ipbox .btn { margin-left: 0; }
  .tabs { width: 100%; }
  .tab { flex: 1; text-align: center; }
  .card, .step { padding: 1.5rem; }
  .drawer__link { font-size: 1.32rem; }
}

/* --------------------------------------------------------------------------
   22. Mouvement réduit
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] { opacity: 1 !important; transform: none !important; }
  ::view-transition-old(root), ::view-transition-new(root) { animation: none !important; }
  .hero__logo, .hero__ring, .hero__halo { animation: none !important; }
}