/* =========================================================
   ZÉRO-CO2 — Design tokens
   ========================================================= */
:root{
  /* Brand (from logo) */
  --green:#2BB673;
  --green-deep:#1E8E5A;
  --blue:#1C9AD6;
  --blue-deep:#1465A8;
  --ink:#0F1B2D;
  --paper:#FAFAF8;
  --paper-alt:#F1F4F2;
  --line:#DCE3E0;

  /* NovaRoads sub-brand */
  --road-asphalt:#262428;
  --road-amber:#F3B23A;
  --road-amber-deep:#D4901C;

  /* Hydrostop sub-brand */
  --hs-navy:#0B2F52;
  --hs-cyan:#2FB4D9;
  --hs-steel:#3C4650;

  --font-display:"Space Grotesk", sans-serif;
  --font-body:"Inter", sans-serif;
  --font-mono:"JetBrains Mono", monospace;

  --radius:14px;
  --container:1180px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
html,body{overflow-x:hidden;width:100%;}
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
body.nav-open{overflow:hidden;}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul{margin:0;padding:0;}
h1,h2,h3{font-family:var(--font-display);margin:0;line-height:1.08;}
p{margin:0;}

.wrap{
  max-width:var(--container);
  margin:0 auto;
  padding:0 28px;
}

/* focus visibility */
a:focus-visible,button:focus-visible{
  outline:3px solid var(--blue);
  outline-offset:3px;
  border-radius:6px;
}

@media (prefers-reduced-motion: reduce){
  *{animation-duration:0.001ms !important;animation-iteration-count:1 !important;transition-duration:0.001ms !important;scroll-behavior:auto !important;}
}

/* =========================================================
   Header
   ========================================================= */
.site-header{
  position:sticky;
  top:0;
  z-index:200;
  background:rgba(250,250,248,0.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.site-header .wrap{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:74px;
  gap:16px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-display);
  font-weight:600;
  font-size:1.05rem;
  letter-spacing:0.01em;
  flex-shrink:0;
}
.brand img{height:38px;width:auto;}
.brand .co2{color:var(--blue-deep);}

.header-right{
  display:flex;
  align-items:center;
  gap:22px;
}
.header-phone{
  display:flex;
  align-items:center;
  gap:7px;
  font-family:var(--font-mono);
  font-size:0.86rem;
  font-weight:500;
  white-space:nowrap;
  color:var(--ink);
}
.header-phone svg{flex-shrink:0;color:var(--green-deep);}
.nav-phone-item{display:none;}

.main-nav ul{
  display:flex;
  gap:30px;
  font-size:0.92rem;
  font-weight:500;
}
.main-nav a{
  color:var(--ink);
  opacity:0.7;
  transition:opacity .2s;
}
.main-nav a:hover{opacity:1;}

.nav-toggle{
  display:none;
  position:relative;
  z-index:210;
  width:40px;
  height:40px;
  background:none;
  border:none;
  cursor:pointer;
  padding:0;
  flex-shrink:0;
}
.nav-toggle span{
  position:absolute;
  left:8px;
  display:block;
  width:24px;height:2px;
  background:var(--ink);
  border-radius:2px;
  transition:transform .25s ease, opacity .25s ease, top .25s ease;
}
.nav-toggle span:nth-child(1){top:14px;}
.nav-toggle span:nth-child(2){top:20px;}
.nav-toggle span:nth-child(3){top:26px;}
.nav-toggle.active span:nth-child(1){top:20px;transform:rotate(45deg);}
.nav-toggle.active span:nth-child(2){opacity:0;}
.nav-toggle.active span:nth-child(3){top:20px;transform:rotate(-45deg);}

@media (max-width:760px){
  .header-phone span.phone-text{display:none;}
  .main-nav{
    position:fixed;
    z-index:190;
    top:74px;
    left:0;
    right:0;
    bottom:0;
    height:calc(100vh - 74px);
    overflow-y:auto;
    -webkit-overflow-scrolling:touch;
    background:var(--paper);
    transform:translateX(100%);
    transition:transform .3s ease;
    padding:36px 28px;
    border-top:1px solid var(--line);
  }
  .main-nav.open{transform:translateX(0);}
  .main-nav ul{flex-direction:column;gap:6px;font-size:1.15rem;}
  .main-nav ul li{border-bottom:1px solid var(--line);}
  .nav-phone-item{display:block;}
  .main-nav a{
    display:block;
    padding:16px 4px;
    opacity:1;
  }
  .nav-toggle{display:block;}
}

/* =========================================================
   Hero (home)
   ========================================================= */
.hero{
  padding:72px 0 40px;
  text-align:center;
  position:relative;
  overflow:hidden;
}
.hero-logo{
  width:min(280px, 70vw);
  margin:0 auto 18px;
}
.eyebrow{
  font-family:var(--font-mono);
  font-size:0.78rem;
  letter-spacing:0.16em;
  text-transform:uppercase;
  color:var(--green-deep);
  margin-bottom:18px;
}
.hero h1{
  font-size:clamp(2rem, 5vw, 3.4rem);
  max-width:820px;
  margin:0 auto;
  background:linear-gradient(100deg, var(--green-deep), var(--blue) 60%, var(--blue-deep));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-sub{
  max-width:600px;
  margin:20px auto 0;
  font-size:1.05rem;
  color:#3C4A45;
}

/* circuit divider — signature element echoing the logo's node lines */
.circuit-divider{
  display:flex;
  align-items:center;
  gap:18px;
  margin:48px auto;
}
.circuit-divider .divider-line{
  flex:1 1 auto;
  height:1px;
  background:var(--line);
}
.circuit-divider .divider-nodes{
  flex-shrink:0;
  display:flex;
  align-items:center;
}

/* =========================================================
   Tech cards (home)
   ========================================================= */
.tech-section{padding:0 0 90px;}
.section-head{
  text-align:center;
  max-width:640px;
  margin:0 auto 46px;
}
.section-head h2{font-size:clamp(1.5rem,3vw,2.1rem);}
.section-head p{margin-top:12px;color:#52605B;}

.tech-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:28px;
}
@media (max-width:820px){
  .tech-grid{grid-template-columns:1fr;}
}

.tech-card{
  display:block;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  transition:transform .25s ease, box-shadow .25s ease;
  position:relative;
}
.tech-card:hover{
  transform:translateY(-5px);
  box-shadow:0 18px 40px -16px rgba(15,27,45,0.22);
}

/* mini browser-frame preview */
.preview-frame{
  aspect-ratio:16/10;
  position:relative;
  overflow:hidden;
}
.preview-chrome{
  height:24px;
  background:#E9ECEA;
  display:flex;
  align-items:center;
  gap:6px;
  padding:0 10px;
  border-bottom:1px solid var(--line);
}
.preview-chrome span{
  width:7px;height:7px;border-radius:50%;
  background:#C7CDCB;
}
.preview-body{
  position:absolute;
  inset:24px 0 0 0;
  padding:14px;
  font-family:var(--font-mono);
}

/* NovaRoads preview palette — same photo + overlay as the page hero */
.preview-novaroads .preview-body{
  background:
    linear-gradient(160deg, rgba(38,36,40,0.88), rgba(212,144,28,0.45) 130%),
    url("../assets/novaroads-hero.jpg") center/cover no-repeat;
}
.preview-novaroads .pv-bar{height:7px;border-radius:3px;background:var(--road-amber);width:46%;margin-bottom:10px;}
.preview-novaroads .pv-line{height:5px;border-radius:3px;background:rgba(255,255,255,0.18);margin-bottom:7px;}
.preview-novaroads .pv-chip{
  display:inline-block;margin-top:10px;padding:5px 10px;border-radius:20px;
  background:rgba(243,178,58,0.16);color:var(--road-amber);font-size:0.62rem;letter-spacing:.04em;
}

/* Hydrostop preview palette — same photo + overlay as the page hero */
.preview-hydrostop .preview-body{
  background:
    linear-gradient(160deg, rgba(11,47,82,0.88), rgba(47,180,217,0.45) 130%),
    url("https://hydroprotect-solutions.com/wp-content/uploads/2026/04/hydro-protect-solution-etancheite-projetee-a-chaud-38.jpg") center/cover no-repeat;
}
.preview-hydrostop .pv-bar{height:7px;border-radius:3px;background:var(--hs-cyan);width:52%;margin-bottom:10px;}
.preview-hydrostop .pv-line{height:5px;border-radius:3px;background:rgba(255,255,255,0.18);margin-bottom:7px;}
.preview-hydrostop .pv-chip{
  display:inline-block;margin-top:10px;padding:5px 10px;border-radius:20px;
  background:rgba(47,180,217,0.16);color:var(--hs-cyan);font-size:0.62rem;letter-spacing:.04em;
}

.tech-card-body{
  padding:24px 24px 26px;
}
.tech-tag{
  font-family:var(--font-mono);
  font-size:0.68rem;
  letter-spacing:0.12em;
  text-transform:uppercase;
}
.tech-card.is-novaroads .tech-tag{color:var(--road-amber-deep);}
.tech-card.is-hydrostop .tech-tag{color:var(--hs-cyan);}

.tech-card h3{
  font-size:1.4rem;
  margin:8px 0 8px;
}
.tech-card p{
  color:#52605B;
  font-size:0.94rem;
}
.card-cta{
  margin-top:16px;
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-weight:600;
  font-size:0.9rem;
}
.tech-card.is-novaroads .card-cta{color:var(--road-amber-deep);}
.tech-card.is-hydrostop .card-cta{color:var(--hs-cyan-deep,var(--hs-navy));}
.card-cta svg{transition:transform .2s;}
.tech-card:hover .card-cta svg{transform:translateX(4px);}

/* =========================================================
   Footer
   ========================================================= */
.site-footer{
  border-top:1px solid var(--line);
  padding:34px 0;
  font-size:0.85rem;
  color:#5C6A65;
}
.site-footer .wrap{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  justify-content:space-between;
  align-items:center;
}
.site-footer a{opacity:.8;}
.site-footer a:hover{opacity:1;text-decoration:underline;}

/* =========================================================
   Sub-page hero (shared between novaroads.html / hydrostop.html)
   ========================================================= */
.sub-hero{
  padding:64px 0 56px;
  color:#fff;
}
.sub-hero.theme-nova{
  background:
    linear-gradient(135deg, rgba(38,36,40,0.93), rgba(59,55,60,0.82) 55%, rgba(212,144,28,0.55)),
    url("../assets/novaroads-hero.jpg") center/cover no-repeat;
}
.sub-hero.theme-hs{
  background:
    linear-gradient(135deg, rgba(11,47,82,0.93), rgba(14,74,124,0.82) 55%, rgba(47,180,217,0.5)),
    url("https://hydroprotect-solutions.com/wp-content/uploads/2026/04/hydro-protect-solution-etancheite-projetee-a-chaud-38.jpg") center/cover no-repeat;
}

.sub-hero .eyebrow{color:rgba(255,255,255,0.75);}
.sub-hero h1{
  font-size:clamp(1.9rem,4.4vw,3.1rem);
  max-width:760px;
  color:#fff;
  background:none;
}
.sub-hero p.lead{
  max-width:640px;
  margin-top:18px;
  font-size:1.05rem;
  color:rgba(255,255,255,0.85);
}
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-top:28px;
  padding:13px 24px;
  border-radius:999px;
  font-weight:600;
  font-size:0.92rem;
  background:#fff;
  color:var(--ink);
}
.theme-nova .btn{color:var(--road-asphalt);}
.theme-hs .btn{color:var(--hs-navy);}
.btn:hover{transform:translateY(-2px);}
.btn-outline,
.theme-nova .btn-outline,
.theme-hs .btn-outline{
  background:transparent;
  border:1.5px solid rgba(255,255,255,0.6);
  color:#fff;
}
.btn-outline:hover{background:rgba(255,255,255,0.12);}

.stat-row{
  display:flex;
  flex-wrap:wrap;
  gap:34px;
  margin-top:38px;
}
.stat-row .stat-num{
  font-family:var(--font-mono);
  font-size:2rem;
  color:#fff;
}
.stat-row .stat-label{
  font-size:0.8rem;
  color:rgba(255,255,255,0.7);
  margin-top:2px;
  max-width:140px;
}

.content-section{padding:70px 0;}
.content-section.alt{background:var(--paper-alt);}
.content-section .section-head{margin-bottom:42px;text-align:left;max-width:none;}
.content-section .section-head h2{font-size:clamp(1.5rem,3vw,2.2rem);}

.feature-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:22px;
}
@media (max-width:880px){.feature-grid{grid-template-columns:1fr 1fr;}}
@media (max-width:560px){.feature-grid{grid-template-columns:1fr;}}

.feature-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px;
}
.feature-card .num{
  font-family:var(--font-mono);
  font-size:0.78rem;
  color:#8C9893;
}
.feature-card .feature-icon{
  width:44px;
  height:44px;
  object-fit:contain;
  margin-bottom:6px;
}
.feature-card h3{font-size:1.05rem;margin:10px 0 8px;}
.feature-card p{font-size:0.9rem;color:#52605B;}

.checklist{display:grid;gap:14px;}
.checklist li{
  display:flex;
  gap:12px;
  align-items:flex-start;
  font-size:0.96rem;
  color:#33403B;
}
.checklist svg{flex-shrink:0;margin-top:3px;}

.split{
  display:grid;
  grid-template-columns:1.1fr 1fr;
  gap:48px;
  align-items:center;
}
@media (max-width:840px){.split{grid-template-columns:1fr;}}

.photo-side{
  margin:0;
  border-radius:var(--radius);
  overflow:hidden;
  border:1px solid var(--line);
}
.photo-side img{
  width:100%;
  height:260px;
  object-fit:cover;
  display:block;
}
.photo-side figcaption{
  padding:12px 16px;
  font-size:0.84rem;
  color:#52605B;
  background:#fff;
}

.sectors-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:18px;
}
@media (max-width:880px){.sectors-grid{grid-template-columns:1fr 1fr;}}
@media (max-width:520px){.sectors-grid{grid-template-columns:1fr;}}
.sector-card{
  padding:22px 18px;
  border-radius:var(--radius);
  background:#fff;
  border:1px solid var(--line);
  font-size:0.9rem;
}
.sector-card h4{font-family:var(--font-display);font-size:1rem;margin-bottom:6px;}
.sector-card p{color:#52605B;font-size:0.86rem;}
.sector-card.has-photo{
  padding:0;
  overflow:hidden;
  display:flex;
  flex-direction:column;
}
.sector-card.has-photo img{
  width:100%;
  height:130px;
  object-fit:cover;
  display:block;
}
.sector-card.has-photo .sector-text{padding:16px 18px;}

.cta-band{
  padding:64px 0;
  text-align:center;
  color:#fff;
}
.theme-nova ~ .cta-band, .cta-band.theme-nova{background:linear-gradient(135deg, var(--road-asphalt), var(--road-amber-deep));}
.cta-band.theme-hs{background:linear-gradient(135deg, var(--hs-navy), var(--hs-cyan));}
.cta-band h2{color:#fff;font-size:clamp(1.5rem,3vw,2.1rem);max-width:560px;margin:0 auto;}
.cta-band p{margin-top:12px;color:rgba(255,255,255,0.85);}

/* =========================================================
   Photo banners (real photography, full-bleed cards)
   ========================================================= */
.illustration-section{padding:56px 0;}
.illustration-section .wrap{padding:0 28px;}

.photo-banner{
  margin:0 0 22px;
  border-radius:var(--radius);
  overflow:hidden;
  border:1px solid var(--line);
  position:relative;
}
.photo-banner img{
  width:100%;
  height:clamp(220px, 42vw, 420px);
  object-fit:cover;
  display:block;
}
.photo-banner figcaption{
  position:absolute;
  left:0;right:0;bottom:0;
  padding:14px 20px;
  font-size:0.82rem;
  color:#fff;
  background:linear-gradient(to top, rgba(0,0,0,0.55), transparent);
}

.photo-duo{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:18px;
}
@media (max-width:680px){.photo-duo{grid-template-columns:1fr;}}
.photo-duo figure{
  margin:0;
  border-radius:var(--radius);
  overflow:hidden;
  border:1px solid var(--line);
}
.photo-duo img{
  width:100%;
  height:230px;
  object-fit:cover;
  display:block;
}
.photo-duo figcaption{
  padding:12px 16px;
  font-size:0.84rem;
  color:#52605B;
  background:#fff;
}

.back-home{
  font-family:var(--font-mono);
  font-size:0.8rem;
  letter-spacing:0.05em;
  display:inline-flex;
  align-items:center;
  gap:6px;
  margin-bottom:22px;
  opacity:0.85;
}
.back-home:hover{opacity:1;}