/* =========================================================
   SPI — Système de Prévention Incendie
   Feuille de style unique, sans dépendance externe.
   ========================================================= */

:root{
  /* Fond */
  --bg:        #080d12;
  --bg-2:      #0b131a;
  --bg-3:      #0f1a23;
  --line:      #1b2b36;
  --line-soft: #16242e;

  /* Texte */
  --fg:        #e8f1f6;
  --fg-2:      #a7bcc8;
  --fg-3:      #6f8794;

  /* Accents */
  --water:     #38bdf8;
  --water-2:   #7dd3fc;
  --water-dim: rgba(56,189,248,.12);
  --ember:     #ff6b35;
  --ember-2:   #ffa94d;
  --ember-dim: rgba(255,107,53,.12);

  /* Rythme */
  --r:         14px;
  --r-lg:      22px;
  --wrap:      1180px;
  --pad:       clamp(1.15rem, 4vw, 2rem);
  --sec-y:     clamp(4.5rem, 10vw, 8rem);

  --sans: "Inter", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --shadow: 0 24px 60px -24px rgba(0,0,0,.8);
}

*,*::before,*::after{ box-sizing:border-box; }

html{ scroll-behavior:smooth; scroll-padding-top:88px; }

body{
  margin:0;
  background:var(--bg);
  color:var(--fg);
  font-family:var(--sans);
  font-size:clamp(1rem,.97rem + .16vw,1.075rem);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

img,svg{ max-width:100%; }
a{ color:inherit; }

h1,h2,h3,h4{
  margin:0 0 .5em;
  line-height:1.12;
  letter-spacing:-.022em;
  font-weight:700;
}
h1{ font-size:clamp(2.3rem,1.4rem + 3.9vw,4.15rem); letter-spacing:-.032em; }
h2{ font-size:clamp(1.75rem,1.2rem + 2.2vw,2.85rem); letter-spacing:-.028em; }
h3{ font-size:clamp(1.08rem,1rem + .35vw,1.28rem); }
p{ margin:0 0 1rem; }

.wrap{ width:100%; max-width:var(--wrap); margin-inline:auto; padding-inline:var(--pad); }
.wrap-narrow{ max-width:840px; }

.skip-link{
  position:absolute; left:-9999px; top:0; z-index:200;
  background:var(--water); color:#04121c; padding:.7rem 1.1rem; border-radius:0 0 10px 0;
  font-weight:600; text-decoration:none;
}
.skip-link:focus{ left:0; }

:focus-visible{ outline:2px solid var(--water); outline-offset:3px; border-radius:6px; }

/* ---------------------------------------------------------
   Boutons
   --------------------------------------------------------- */
.btn{
  --btn-bg:transparent;
  display:inline-flex; align-items:center; justify-content:center; gap:.5rem;
  padding:.92rem 1.6rem;
  border:1px solid transparent; border-radius:100px;
  background:var(--btn-bg);
  font:inherit; font-weight:600; font-size:.97rem;
  text-decoration:none; cursor:pointer;
  transition:transform .18s ease, box-shadow .25s ease, background .2s ease, border-color .2s ease;
}
.btn:hover{ transform:translateY(-2px); }
.btn:active{ transform:translateY(0); }

.btn-primary{
  background:linear-gradient(135deg,var(--water) 0%,#0ea5e9 100%);
  color:#04121c;
  box-shadow:0 10px 30px -10px rgba(56,189,248,.65);
}
.btn-primary:hover{ box-shadow:0 16px 40px -12px rgba(56,189,248,.85); }

.btn-ghost{
  border-color:var(--line);
  color:var(--fg);
  background:rgba(255,255,255,.02);
}
.btn-ghost:hover{ border-color:var(--water); background:var(--water-dim); }

.btn-sm{ padding:.62rem 1.15rem; font-size:.9rem; }
.btn-block{ width:100%; }

/* ---------------------------------------------------------
   En-tête
   --------------------------------------------------------- */
.site-header{
  position:sticky; top:0; z-index:100;
  -webkit-backdrop-filter:blur(14px); backdrop-filter:blur(14px);
  background:rgba(8,13,18,.55);
  border-bottom:1px solid transparent;
  transition:background .3s ease, border-color .3s ease;
}
.site-header.scrolled{
  background:rgba(8,13,18,.92);
  border-bottom-color:var(--line-soft);
}
.header-inner{ display:flex; align-items:center; justify-content:space-between; gap:1rem; height:72px; }

.brand{ display:inline-flex; align-items:center; gap:.65rem; text-decoration:none; color:var(--fg); }
.brand-mark{ width:34px; height:34px; color:var(--water); flex:none; }
.brand-text{ display:flex; flex-direction:column; line-height:1.05; }
.brand-text strong{ font-size:1.22rem; letter-spacing:.12em; font-weight:800; }
.brand-text em{ font-style:normal; font-size:.66rem; letter-spacing:.055em; color:var(--fg-3); text-transform:uppercase; }

.nav{ display:flex; align-items:center; gap:.35rem; }
.nav > a{
  padding:.5rem .78rem; border-radius:8px;
  font-size:.93rem; font-weight:500; color:var(--fg-2); text-decoration:none;
  transition:color .18s ease, background .18s ease;
}
.nav > a:not(.btn):hover{ color:var(--fg); background:rgba(255,255,255,.045); }
.nav > a.btn{ margin-left:.45rem; color:#04121c; }

.burger{
  display:none; flex-direction:column; gap:5px;
  width:44px; height:44px; padding:0;
  align-items:center; justify-content:center;
  background:none; border:1px solid var(--line); border-radius:11px; cursor:pointer;
}
.burger span{ display:block; width:19px; height:2px; background:var(--fg); border-radius:2px; transition:transform .25s ease, opacity .2s ease; }
.burger[aria-expanded="true"] span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2){ opacity:0; }
.burger[aria-expanded="true"] span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }

/* ---------------------------------------------------------
   Hero
   --------------------------------------------------------- */
.hero{ position:relative; overflow:hidden; padding-block:clamp(3rem,7vw,5.5rem) clamp(4rem,9vw,7rem); }
.hero-bg{
  position:absolute; inset:-30% -10% auto -10%; height:120%;
  background:
    radial-gradient(60% 55% at 78% 12%, rgba(255,107,53,.16) 0%, transparent 62%),
    radial-gradient(55% 60% at 22% 78%, rgba(56,189,248,.13) 0%, transparent 65%);
  pointer-events:none;
}
.hero-inner{
  position:relative;
  display:grid; grid-template-columns:1.06fr .94fr; gap:clamp(2rem,5vw,4rem);
  align-items:center;
}

.eyebrow{
  display:inline-flex; align-items:center; gap:.55rem;
  margin:0 0 1.15rem;
  padding:.4rem .9rem .4rem .7rem;
  border:1px solid var(--line); border-radius:100px;
  background:var(--water-dim);
  font-size:.79rem; font-weight:600; letter-spacing:.045em; text-transform:uppercase;
  color:var(--water-2);
}
.eyebrow .dot{ width:7px; height:7px; border-radius:50%; background:var(--water); box-shadow:0 0 0 4px rgba(56,189,248,.18); }
.eyebrow.ember{ color:var(--ember-2); background:var(--ember-dim); border-color:rgba(255,107,53,.28); }
.eyebrow.ember .dot{ background:var(--ember); box-shadow:0 0 0 4px rgba(255,107,53,.18); }

.hero h1 .hl{
  background:linear-gradient(100deg,var(--water-2) 0%,var(--water) 45%,#0284c7 100%);
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.lead{ font-size:clamp(1.03rem,.98rem + .32vw,1.2rem); color:var(--fg-2); max-width:56ch; }
.lead strong{ color:var(--fg); }

.hero-cta{ display:flex; flex-wrap:wrap; gap:.75rem; margin:1.9rem 0 1.7rem; }

.hero-points{ list-style:none; margin:0; padding:0; display:grid; gap:.6rem; }
.hero-points li{ display:flex; align-items:flex-start; gap:.6rem; font-size:.94rem; color:var(--fg-2); }
.hero-points svg{
  width:19px; height:19px; flex:none; margin-top:.15rem;
  fill:none; stroke:var(--water); stroke-width:2.4; stroke-linecap:round; stroke-linejoin:round;
}

/* --- Illustration maison --- */
.hero-visual{ position:relative; }
.house{ width:100%; height:auto; display:block; filter:drop-shadow(0 30px 50px rgba(0,0,0,.55)); }

.house .mist{ animation:mistPulse 5s ease-in-out infinite; transform-origin:center; }
@keyframes mistPulse{ 0%,100%{ opacity:.55; transform:scale(.97); } 50%{ opacity:1; transform:scale(1.03); } }

.house .treeline path{ animation:emberFlicker 2.6s ease-in-out infinite alternate; }
@keyframes emberFlicker{ from{ opacity:.14; } to{ opacity:.32; } }

.house .diff circle{ fill:var(--water-2); filter:drop-shadow(0 0 7px rgba(125,211,252,.9)); }
.house .jet{
  fill:none; stroke:var(--water); stroke-width:2.2; stroke-linecap:round;
  stroke-dasharray:8 10; opacity:.75;
  animation:jetFlow 1.4s linear infinite; animation-delay:var(--d,0s);
}
.house .diff.wall .jet{ stroke:var(--water-2); opacity:.55; }
@keyframes jetFlow{ to{ stroke-dashoffset:-36; } }

.house .drops circle{ fill:var(--water-2); opacity:.45; animation:dropFall 2.4s ease-in infinite; }
.house .drops circle:nth-child(2){ animation-delay:.4s; }
.house .drops circle:nth-child(3){ animation-delay:.9s; }
.house .drops circle:nth-child(4){ animation-delay:1.3s; }
.house .drops circle:nth-child(5){ animation-delay:1.7s; }
.house .drops circle:nth-child(6){ animation-delay:2.1s; }
@keyframes dropFall{ 0%{ transform:translateY(-8px); opacity:0; } 25%{ opacity:.6; } 100%{ transform:translateY(38px); opacity:0; } }

.badge-live{
  position:absolute; left:50%; bottom:-6px; transform:translateX(-50%);
  display:inline-flex; align-items:center; gap:.55rem;
  padding:.55rem 1.05rem;
  border:1px solid rgba(56,189,248,.32); border-radius:100px;
  background:rgba(8,20,28,.9);
  -webkit-backdrop-filter:blur(8px); backdrop-filter:blur(8px);
  font-size:.8rem; font-weight:600; color:var(--water-2); white-space:nowrap;
}
.badge-live .pulse{ width:8px; height:8px; border-radius:50%; background:var(--water); animation:pulse 1.8s ease-out infinite; }
@keyframes pulse{
  0%{ box-shadow:0 0 0 0 rgba(56,189,248,.6); }
  70%{ box-shadow:0 0 0 11px rgba(56,189,248,0); }
  100%{ box-shadow:0 0 0 0 rgba(56,189,248,0); }
}

/* ---------------------------------------------------------
   Chiffres
   --------------------------------------------------------- */
.stats{
  padding-block:clamp(2.5rem,5vw,3.5rem);
  border-block:1px solid var(--line-soft);
  background:linear-gradient(180deg,var(--bg-2),var(--bg));
}
.stats-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:clamp(1.2rem,3vw,2.5rem); }
.stat{ border-left:2px solid var(--line); padding-left:1.15rem; }
.stat-num{
  display:block; font-size:clamp(2rem,1.4rem + 2vw,2.9rem); font-weight:800;
  letter-spacing:-.035em; line-height:1.05;
  background:linear-gradient(135deg,var(--ember-2),var(--ember));
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.stat p{ margin:.4rem 0 0; font-size:.88rem; color:var(--fg-3); line-height:1.5; }
.stats-note{ margin:1.8rem auto 0; font-size:.76rem; color:var(--fg-3); opacity:.7; }

/* ---------------------------------------------------------
   Sections
   --------------------------------------------------------- */
.section{ padding-block:var(--sec-y); position:relative; }
.section-alt{ background:var(--bg-2); border-block:1px solid var(--line-soft); }
.section-danger{
  background:
    radial-gradient(70% 100% at 50% 0%, rgba(255,107,53,.09) 0%, transparent 60%),
    var(--bg);
}

.sec-head{ max-width:72ch; margin-bottom:clamp(2.5rem,5vw,3.75rem); }
.sec-head.center{ margin-inline:auto; text-align:center; }
.sec-lead{ color:var(--fg-2); font-size:clamp(1rem,.96rem + .25vw,1.13rem); }
.sec-lead strong{ color:var(--fg); }

/* --- Cartes --- */
.cards{ display:grid; gap:1.15rem; }
.cards-2{ grid-template-columns:repeat(2,1fr); }
.cards-3{ grid-template-columns:repeat(3,1fr); }

.card{
  padding:1.75rem;
  border:1px solid var(--line); border-radius:var(--r-lg);
  background:linear-gradient(160deg,var(--bg-3) 0%,var(--bg-2) 100%);
  transition:transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.card:hover{ transform:translateY(-4px); border-color:rgba(56,189,248,.35); box-shadow:var(--shadow); }
.card.danger:hover{ border-color:rgba(255,107,53,.4); }
.card p{ color:var(--fg-2); font-size:.95rem; margin-bottom:0; }
.card h3{ margin-bottom:.55rem; }

.card-ico{
  width:46px; height:46px; margin-bottom:1.1rem;
  display:grid; place-items:center;
  border-radius:13px;
  background:var(--ember-dim); border:1px solid rgba(255,107,53,.25);
}
.card-ico svg{ width:23px; height:23px; fill:none; stroke:var(--ember-2); stroke-width:1.8; stroke-linecap:round; stroke-linejoin:round; }
.card-ico.blue{ background:var(--water-dim); border-color:rgba(56,189,248,.25); }
.card-ico.blue svg{ stroke:var(--water-2); }

.ticks{ list-style:none; margin:1.1rem 0 0; padding:0; display:grid; gap:.45rem; }
.ticks li{ position:relative; padding-left:1.4rem; font-size:.88rem; color:var(--fg-3); }
.ticks li::before{
  content:""; position:absolute; left:0; top:.55em;
  width:7px; height:7px; border-radius:2px; background:var(--water); opacity:.75;
}

.tag{
  display:inline-block; vertical-align:middle; margin-left:.45rem;
  padding:.15rem .55rem; border-radius:100px;
  background:var(--water-dim); border:1px solid rgba(56,189,248,.28);
  font-size:.66rem; font-weight:700; letter-spacing:.06em; text-transform:uppercase; color:var(--water-2);
}

.quotes{
  display:grid; grid-template-columns:repeat(2,1fr); gap:1.15rem;
  margin-top:clamp(2.5rem,5vw,3.5rem);
}
.pullquote{
  margin:0; padding:1.75rem clamp(1.5rem,3vw,2.25rem);
  border-left:3px solid var(--ember); border-radius:0 var(--r) var(--r) 0;
  background:linear-gradient(105deg,var(--ember-dim),transparent 80%);
}
.pullquote p{
  font-size:clamp(1.02rem,.98rem + .38vw,1.24rem); font-style:italic;
  color:var(--fg); margin-bottom:.85rem; text-wrap:balance;
}
.pullquote footer{ font-size:.83rem; color:var(--fg-3); }

/* --- Étapes --- */
.steps{
  list-style:none; margin:0; padding:0;
  display:grid; grid-template-columns:repeat(4,1fr); gap:1.15rem;
  counter-reset:step;
}
.step{
  position:relative; padding:1.6rem 1.4rem;
  border:1px solid var(--line); border-radius:var(--r-lg);
  background:var(--bg-2);
}
.step::after{
  content:""; position:absolute; top:2.45rem; right:-1.15rem; width:1.15rem; height:1px;
  background:linear-gradient(90deg,var(--line),transparent);
}
.step:last-child::after{ display:none; }
.step-num{
  display:grid; place-items:center;
  width:36px; height:36px; margin-bottom:1rem;
  border-radius:11px;
  background:linear-gradient(135deg,var(--water),#0284c7);
  color:#04121c; font-weight:800; font-size:1rem;
}
.step h3{ margin-bottom:.4rem; }
.step p{ margin:0; font-size:.9rem; color:var(--fg-2); }

/* --- Encart science --- */
.science{
  margin-top:clamp(2.5rem,5vw,3.75rem); padding:clamp(1.75rem,4vw,2.75rem);
  border:1px solid var(--line); border-radius:var(--r-lg);
  background:
    radial-gradient(80% 130% at 0% 0%, rgba(56,189,248,.09), transparent 55%),
    var(--bg-2);
}
.science h3{ margin-bottom:1.75rem; font-size:clamp(1.15rem,1rem + .5vw,1.45rem); }
.science-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:2rem; }
.sci-num{
  display:block; margin-bottom:.5rem;
  font-size:clamp(1.5rem,1.2rem + 1.2vw,2rem); font-weight:800; letter-spacing:-.03em;
  color:var(--water-2);
}
.science-grid p{ margin:0; font-size:.9rem; color:var(--fg-2); }

/* --- Encart d'appel --- */
.callout{
  display:flex; gap:1.1rem; align-items:flex-start;
  margin-top:clamp(2rem,4vw,3rem); padding:1.5rem 1.75rem;
  border:1px solid rgba(255,107,53,.28); border-radius:var(--r-lg);
  background:linear-gradient(120deg,var(--ember-dim),transparent 65%);
}
.callout svg{ width:24px; height:24px; flex:none; margin-top:.15rem; fill:none; stroke:var(--ember-2); stroke-width:1.8; stroke-linecap:round; }
.callout p{ margin:0; font-size:.95rem; color:var(--fg-2); }
.callout strong{ color:var(--fg); }

/* ---------------------------------------------------------
   Domotique
   --------------------------------------------------------- */
.two-col{ display:grid; grid-template-columns:1.08fr .92fr; gap:clamp(2.5rem,6vw,5rem); align-items:center; }

.modes{ display:grid; grid-template-columns:repeat(2,1fr); gap:1.15rem; margin:2rem 0; }
.mode{ padding:1.25rem 1.35rem; border:1px solid var(--line); border-radius:var(--r); background:var(--bg-2); }
.mode h3{ display:flex; align-items:center; gap:.55rem; font-size:1rem; margin-bottom:.35rem; }
.mode-ico{ font-size:1.15rem; }
.mode p{ margin:0; font-size:.87rem; color:var(--fg-3); }

.compat-label{ font-size:.85rem; color:var(--fg-3); margin-bottom:.7rem; }
.compat{ list-style:none; display:flex; flex-wrap:wrap; gap:.5rem; margin:0; padding:0; }
.compat li{
  padding:.4rem .85rem; border:1px solid var(--line); border-radius:100px;
  background:var(--bg-3); font-size:.82rem; color:var(--fg-2); font-weight:500;
}

/* --- Maquette téléphone --- */
.phone-wrap{ display:grid; place-items:center; }
.phone{
  position:relative; width:min(310px,88vw); padding:12px;
  border:1px solid var(--line); border-radius:40px;
  background:linear-gradient(160deg,#121e28,#0a1219);
  box-shadow:0 40px 80px -30px rgba(0,0,0,.9), inset 0 1px 0 rgba(255,255,255,.05);
}
.phone-notch{
  position:absolute; top:20px; left:50%; transform:translateX(-50%);
  width:88px; height:5px; border-radius:100px; background:#050a0e; z-index:2;
}
.phone-screen{
  padding:2.1rem 1.05rem 1.15rem;
  border-radius:30px;
  background:radial-gradient(120% 80% at 50% 0%, #10202b, #070d12);
  min-height:520px;
}
.app-head{ display:flex; align-items:center; justify-content:space-between; margin-bottom:1rem; }
.app-title{ font-size:.83rem; font-weight:700; letter-spacing:.02em; }
.app-state{ font-size:.68rem; color:var(--fg-3); padding:.2rem .55rem; border:1px solid var(--line); border-radius:100px; }

.app-alert{
  display:flex; gap:.65rem; align-items:center;
  padding:.7rem .8rem; margin-bottom:1.1rem;
  border:1px solid rgba(255,107,53,.35); border-radius:12px;
  background:var(--ember-dim);
}
.alert-ico{ font-size:1.1rem; }
.app-alert strong{ display:block; font-size:.78rem; color:var(--ember-2); }
.app-alert span{ font-size:.68rem; color:var(--fg-3); }

.app-trigger{
  position:relative; display:block; width:150px; height:150px; margin:0 auto 1.35rem;
  border:0; border-radius:50%; cursor:pointer;
  background:radial-gradient(circle at 50% 35%, #38bdf8, #0369a1);
  color:#04121c; font:inherit; font-weight:800; font-size:.92rem; letter-spacing:.09em; line-height:1.25;
  box-shadow:0 0 40px -6px rgba(56,189,248,.6);
}
.app-trigger small{ display:block; font-size:.63rem; font-weight:600; letter-spacing:.03em; opacity:.75; }
.trigger-ring{
  position:absolute; inset:-9px; border-radius:50%;
  border:1px solid rgba(56,189,248,.45);
  animation:ring 2.6s ease-out infinite;
}
@keyframes ring{ 0%{ transform:scale(.95); opacity:.9; } 100%{ transform:scale(1.16); opacity:0; } }

.app-rows{ display:grid; gap:.15rem; margin-bottom:1.1rem; }
.app-row{ display:flex; justify-content:space-between; padding:.5rem 0; border-bottom:1px solid rgba(255,255,255,.045); font-size:.76rem; }
.app-row span{ color:var(--fg-3); }
.app-row b{ color:var(--fg); font-weight:600; }

.app-zones{ display:grid; grid-template-columns:1fr 1fr; gap:.45rem; }
.zone{
  display:flex; align-items:center; justify-content:space-between; gap:.4rem;
  padding:.5rem .65rem; border:1px solid var(--line); border-radius:10px;
  font-size:.7rem; color:var(--fg-3);
}
.zone i{ width:7px; height:7px; border-radius:50%; background:#2b3d49; flex:none; }
.zone.on{ border-color:rgba(56,189,248,.4); color:var(--water-2); background:var(--water-dim); }
.zone.on i{ background:var(--water); box-shadow:0 0 8px var(--water); }

/* ---------------------------------------------------------
   Frise d'installation
   --------------------------------------------------------- */
.timeline{ display:grid; grid-template-columns:repeat(5,1fr); gap:1.15rem; position:relative; }
.timeline::before{
  content:""; position:absolute; top:7px; left:6%; right:6%; height:1px;
  background:linear-gradient(90deg,transparent,var(--line) 12%,var(--line) 88%,transparent);
}
.tl-item{ position:relative; padding-top:2.5rem; }
.tl-dot{
  position:absolute; top:0; left:0;
  width:15px; height:15px; border-radius:50%;
  background:var(--bg-2); border:2px solid var(--water);
  box-shadow:0 0 0 5px rgba(56,189,248,.1);
}
.tl-item h3{ font-size:1rem; margin-bottom:.4rem; }
.tl-item p{ margin:0; font-size:.88rem; color:var(--fg-2); }

/* ---------------------------------------------------------
   Avertissement
   --------------------------------------------------------- */
.section-warning{ padding-block:clamp(3rem,6vw,4.5rem); }
.warning-box{
  padding:clamp(1.75rem,4vw,2.75rem);
  border:1px solid rgba(255,107,53,.3); border-radius:var(--r-lg);
  background:linear-gradient(135deg,rgba(255,107,53,.08),transparent 70%),var(--bg-2);
}
.warning-box h2{ font-size:clamp(1.3rem,1.1rem + .9vw,1.75rem); }
.warning-box p{ color:var(--fg-2); max-width:80ch; }
.warning-box ul{ margin:1.25rem 0 0; padding-left:1.15rem; display:grid; gap:.5rem; }
.warning-box li{ font-size:.92rem; color:var(--fg-2); }
.warning-box li::marker{ color:var(--ember); }

/* ---------------------------------------------------------
   FAQ
   --------------------------------------------------------- */
.faq{ display:grid; gap:.65rem; }
.faq details{
  border:1px solid var(--line); border-radius:var(--r);
  background:var(--bg-2); overflow:hidden;
  transition:border-color .2s ease;
}
.faq details[open]{ border-color:rgba(56,189,248,.32); }
.faq summary{
  display:flex; align-items:center; justify-content:space-between; gap:1rem;
  padding:1.15rem 1.4rem; cursor:pointer; list-style:none;
  font-weight:600; font-size:1rem;
}
.faq summary::-webkit-details-marker{ display:none; }
.faq summary::after{
  content:"+"; flex:none;
  display:grid; place-items:center; width:26px; height:26px;
  border:1px solid var(--line); border-radius:8px;
  color:var(--water); font-weight:400; font-size:1.25rem; line-height:1;
  transition:transform .25s ease, background .2s ease;
}
.faq details[open] summary::after{ content:"−"; transform:rotate(180deg); background:var(--water-dim); }
.faq summary:hover{ color:var(--water-2); }
.faq-body{ padding:0 1.4rem 1.35rem; }
.faq-body p{ margin:0; color:var(--fg-2); font-size:.94rem; }

/* ---------------------------------------------------------
   Contact
   --------------------------------------------------------- */
.section-cta{
  background:
    radial-gradient(70% 90% at 20% 0%, rgba(56,189,248,.1), transparent 60%),
    var(--bg-2);
  border-top:1px solid var(--line-soft);
}
.contact-grid{ display:grid; grid-template-columns:1fr 1fr; gap:clamp(2.5rem,6vw,4.5rem); align-items:start; }

.contact-list{ list-style:none; margin:2rem 0 0; padding:0; display:grid; gap:1.15rem; }
.contact-list li{ display:flex; flex-direction:column; gap:.15rem; }
.contact-list strong{ font-size:.74rem; text-transform:uppercase; letter-spacing:.09em; color:var(--fg-3); font-weight:600; }
.contact-list a{ color:var(--water-2); text-decoration:none; font-size:1.05rem; font-weight:600; }
.contact-list a:hover{ text-decoration:underline; }
.contact-list span{ font-size:.95rem; color:var(--fg-2); }

.form{
  padding:clamp(1.5rem,3.5vw,2.25rem);
  border:1px solid var(--line); border-radius:var(--r-lg);
  background:var(--bg-3); box-shadow:var(--shadow);
}
.field{ margin-bottom:1rem; }
.field-row{ display:grid; grid-template-columns:1fr 1fr; gap:1rem; }
.field label{ display:block; margin-bottom:.4rem; font-size:.82rem; font-weight:600; color:var(--fg-2); }
.field .opt{ font-weight:400; color:var(--fg-3); }
.field input,.field select,.field textarea{
  width:100%; padding:.78rem .95rem;
  border:1px solid var(--line); border-radius:11px;
  background:var(--bg); color:var(--fg);
  font:inherit; font-size:.94rem;
  transition:border-color .2s ease, box-shadow .2s ease;
}
.field textarea{ resize:vertical; min-height:96px; }
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none; border-color:var(--water); box-shadow:0 0 0 3px rgba(56,189,248,.14);
}
.field input.invalid,.field select.invalid{ border-color:#f87171; box-shadow:0 0 0 3px rgba(248,113,113,.13); }

.check{ display:flex; gap:.65rem; align-items:flex-start; margin:.35rem 0 1.35rem; font-size:.83rem; color:var(--fg-3); cursor:pointer; }
.check input{ margin-top:.2rem; width:16px; height:16px; accent-color:var(--water); flex:none; }

.form-msg{ margin:.9rem 0 0; font-size:.87rem; min-height:1.2em; }
.form-msg.ok{ color:var(--water-2); }
.form-msg.err{ color:#f87171; }

/* ---------------------------------------------------------
   Pied de page
   --------------------------------------------------------- */
.site-footer{ padding-block:clamp(3rem,6vw,4.5rem) 2rem; border-top:1px solid var(--line-soft); background:var(--bg); }
.footer-grid{ display:grid; grid-template-columns:1.5fr 1fr 1fr 1.3fr; gap:2.5rem; }
.footer-grid h4{ font-size:.76rem; text-transform:uppercase; letter-spacing:.1em; color:var(--fg-3); margin-bottom:1rem; }
.footer-grid nav{ display:flex; flex-direction:column; gap:.55rem; }
.footer-grid nav a{ font-size:.9rem; color:var(--fg-2); text-decoration:none; width:fit-content; }
.footer-grid nav a:hover{ color:var(--water-2); }
.footer-tag{ margin-top:1rem; font-size:.9rem; color:var(--fg-3); max-width:34ch; }
.footer-note{ font-size:.85rem; color:var(--fg-3); margin:0; }
.footer-note strong{ color:var(--ember-2); }

.footer-bottom{
  display:flex; flex-wrap:wrap; gap:1rem; justify-content:space-between; align-items:center;
  margin-top:3rem; padding-top:1.5rem; border-top:1px solid var(--line-soft);
}
.footer-bottom p{ margin:0; font-size:.8rem; color:var(--fg-3); }
.legal-mini{ max-width:60ch; opacity:.7; }

/* ---------------------------------------------------------
   Animations d'apparition
   --------------------------------------------------------- */
.reveal{ opacity:0; transform:translateY(24px); transition:opacity .65s cubic-bezier(.16,1,.3,1), transform .65s cubic-bezier(.16,1,.3,1); }
.reveal.visible{ opacity:1; transform:none; }

/* ---------------------------------------------------------
   Responsive
   --------------------------------------------------------- */
@media (max-width:1024px){
  .hero-inner{ grid-template-columns:1fr; }
  .hero-visual{ order:-1; max-width:520px; margin-inline:auto; }
  .badge-live{ bottom:6px; }
  .stats-grid{ grid-template-columns:repeat(2,1fr); row-gap:2rem; }
  .steps{ grid-template-columns:repeat(2,1fr); }
  .step::after{ display:none; }
  .timeline{ grid-template-columns:repeat(2,1fr); row-gap:2rem; }
  .timeline::before{ display:none; }
  .two-col{ grid-template-columns:1fr; }
  .phone-wrap{ order:-1; }
  .science-grid{ grid-template-columns:1fr; gap:1.5rem; }
  .footer-grid{ grid-template-columns:1fr 1fr; gap:2rem; }
}

/* La barre de navigation complète tient sur une ligne à partir de ~1100px seulement :
   en dessous, on bascule sur le menu burger. Ce seuil est volontairement découplé
   des autres règles responsive ci-dessous. */
@media (max-width:1100px){
  .burger{ display:flex; }
  .nav{
    position:fixed; inset:72px 0 auto 0;
    flex-direction:column; align-items:stretch; gap:.2rem;
    padding:1rem var(--pad) 1.75rem;
    max-height:calc(100vh - 72px);   /* repli navigateurs anciens */
    max-height:calc(100dvh - 72px);  /* tient compte des barres mobiles */
    overflow-y:auto; overscroll-behavior:contain;
    background:rgba(8,13,18,.985);
    -webkit-backdrop-filter:blur(16px); backdrop-filter:blur(16px);
    border-bottom:1px solid var(--line);
    transform:translateY(-14px); opacity:0; pointer-events:none;
    transition:opacity .22s ease, transform .22s ease;
  }
  .nav.open{ transform:none; opacity:1; pointer-events:auto; }
  .nav > a{ padding:.85rem .5rem; font-size:1rem; border-bottom:1px solid var(--line-soft); border-radius:0; }
  .nav > a.btn{ margin:.9rem 0 0; border-bottom:0; justify-content:center; }
}

@media (max-width:820px){
  .cards-2,.cards-3{ grid-template-columns:1fr; }
  .quotes{ grid-template-columns:1fr; }
  .modes{ grid-template-columns:1fr; }
  .contact-grid{ grid-template-columns:1fr; }
  .callout{ flex-direction:column; gap:.75rem; }
}

@media (max-width:560px){
  .stats-grid{ grid-template-columns:1fr; }
  .steps,.timeline{ grid-template-columns:1fr; }
  .field-row{ grid-template-columns:1fr; }
  .footer-grid{ grid-template-columns:1fr; }
  .hero-cta .btn{ width:100%; }
}

/* ---------------------------------------------------------
   Accessibilité : mouvement réduit / impression
   --------------------------------------------------------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{ animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; }
  html{ scroll-behavior:auto; }
  .reveal{ opacity:1; transform:none; }
}

@media print{
  .site-header,.hero-visual,.phone-wrap,.burger{ display:none; }
  body{ background:#fff; color:#000; }
  .section{ padding-block:1.5rem; }
}