/* =========================================================
   SustainableSystems.eu — shared stylesheet
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@600;700;800&family=Inter:wght@400;500;600&display=swap');

:root{
  /* brand palette: green + blue, sustainability theme */
  --green-900:#0b3d2e;
  --green-700:#157347;
  --green-600:#1c8f5a;
  --green-500:#2fae6d;
  --green-100:#e5f6ec;

  --blue-900:#0a2e4d;
  --blue-700:#125e9a;
  --blue-600:#1878c4;
  --blue-500:#3d97dd;
  --blue-100:#e6f2fb;

  --ink:#122420;
  --muted:#57685f;
  --bg:#f6faf8;
  --card-bg:#ffffff;
  --border:#e1ece5;

  --radius-sm:8px;
  --radius:14px;
  --radius-lg:22px;
  --shadow:0 6px 24px rgba(11,61,46,.10);
  --shadow-lg:0 16px 40px rgba(10,46,77,.16);

  --gradient-brand:linear-gradient(120deg,var(--green-600) 0%,var(--blue-600) 100%);
  --gradient-hero:linear-gradient(135deg,var(--green-900) 0%,var(--blue-900) 100%);

  --container-w:1160px;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{
  font-family:'Poppins',system-ui,sans-serif;
  line-height:1.2;
  margin:0 0 .5em;
  color:var(--green-900);
}
h1{font-size:clamp(2rem,4vw,3rem);}
h2{font-size:clamp(1.5rem,3vw,2.1rem);}
h3{font-size:1.2rem;}
p{margin:0 0 1em;}
a{color:var(--blue-700);text-decoration:none;}
a:hover{color:var(--green-700);}
img{max-width:100%;display:block;}
ul{margin:0;padding:0;}
li{list-style:none;}

.container{
  width:100%;
  max-width:var(--container-w);
  margin:0 auto;
  padding:0 24px;
}

/* ---------- buttons ---------- */
.btn{
  display:inline-block;
  padding:.75em 1.6em;
  border-radius:999px;
  font-weight:600;
  font-size:.95rem;
  border:2px solid transparent;
  cursor:pointer;
  transition:transform .15s ease,box-shadow .15s ease,background .15s ease,color .15s ease;
}
.btn-primary{
  background:var(--gradient-brand);
  color:#fff;
  box-shadow:var(--shadow);
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow-lg);
  color:#fff;
}
.btn-outline{
  background:transparent;
  border-color:#ffffff88;
  color:#fff;
}
.btn-outline:hover{
  background:#ffffff22;
  color:#fff;
  border-color:#fff;
}
.btn-small{
  padding:.5em 1.2em;
  font-size:.85rem;
  background:var(--green-100);
  color:var(--green-700);
}
.btn-small:hover{
  background:var(--green-600);
  color:#fff;
}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--border);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:16px 24px;
}
.logo{
  display:flex;
  align-items:center;
  gap:.5em;
  font-family:'Poppins',sans-serif;
  font-weight:700;
  font-size:1.25rem;
  color:var(--green-900);
}
.logo:hover{color:var(--green-900);}
.logo-icon{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:36px;height:36px;
  border-radius:50%;
  background:var(--gradient-brand);
  font-size:1.1rem;
}
.logo-dot{color:var(--blue-600);}

.site-nav{
  display:flex;
  align-items:center;
  gap:28px;
}
.site-nav a{
  color:var(--ink);
  font-weight:500;
  font-size:.95rem;
  position:relative;
  padding:4px 0;
}
.site-nav a::after{
  content:"";
  position:absolute;
  left:0;bottom:-2px;
  width:0;height:2px;
  background:var(--gradient-brand);
  transition:width .2s ease;
}
.site-nav a:hover::after,
.site-nav a.active::after{width:100%;}
.site-nav a.active{color:var(--green-700);}

.nav-toggle{
  display:none;
  flex-direction:column;
  gap:5px;
  background:none;
  border:none;
  cursor:pointer;
  padding:6px;
}
.nav-toggle span{
  width:24px;height:2px;
  background:var(--green-900);
  border-radius:2px;
  transition:transform .2s ease,opacity .2s ease;
}

/* ---------- hero ---------- */
.hero{
  background:var(--gradient-hero);
  color:#fff;
  padding:72px 0 64px;
  position:relative;
  overflow:hidden;
}
.hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:radial-gradient(circle at 85% 20%,rgba(63,180,120,.35),transparent 55%),
             radial-gradient(circle at 10% 90%,rgba(61,151,221,.3),transparent 50%);
  pointer-events:none;
}
.hero-inner{
  position:relative;
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:40px;
  align-items:center;
}
.hero.hero-simple .hero-inner{grid-template-columns:1fr;text-align:left;}
.hero h1{color:#fff;}
.hero .eyebrow{
  text-transform:uppercase;
  letter-spacing:.14em;
  font-size:.78rem;
  font-weight:600;
  color:var(--green-100);
  margin-bottom:.75em;
  display:inline-block;
}
.hero p.lead{
  font-size:1.1rem;
  color:#e8f3ee;
  max-width:46ch;
}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:1.5em;}
.hero-media{
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:var(--shadow-lg);
}
.hero-media img{width:100%;height:100%;object-fit:cover;}

.breadcrumb{
  font-size:.85rem;
  color:var(--green-100);
  opacity:.85;
  margin-bottom:1em;
}
.breadcrumb a{color:var(--green-100);}
.breadcrumb a:hover{color:#fff;}

/* ---------- sections ---------- */
.section{padding:64px 0;}
.section-tight{padding:40px 0;}
.section-alt{background:#fff;}
.section-head{max-width:640px;margin:0 auto 40px;text-align:center;}
.section-head p{color:var(--muted);}

/* ---------- cards / grids ---------- */
.grid{
  display:grid;
  gap:24px;
}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);}

.card{
  background:var(--card-bg);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:24px;
  box-shadow:var(--shadow);
  transition:transform .18s ease,box-shadow .18s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);}
.card h3{margin-bottom:.4em;}
.card p{color:var(--muted);font-size:.95rem;}

.topic-card{
  display:flex;
  flex-direction:column;
  gap:.6em;
  border-top:4px solid var(--green-500);
}
.topic-card:nth-child(3n+2){border-top-color:var(--blue-500);}
.topic-card:nth-child(3n){border-top-color:var(--green-700);}

.media-card{
  overflow:hidden;
  padding:0;
  display:flex;
  flex-direction:column;
}
.media-card img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
}
.media-card .media-card-body{padding:20px 22px 24px;}

.pill{
  display:inline-block;
  background:var(--blue-100);
  color:var(--blue-700);
  font-size:.75rem;
  font-weight:600;
  padding:.3em .8em;
  border-radius:999px;
  margin-bottom:.6em;
}

.logo-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
}
.logo-tile{
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:18px;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:10px;
  text-align:center;
}
.logo-tile img{height:48px;width:auto;object-fit:contain;}
.logo-tile span{font-size:.8rem;color:var(--muted);}

/* ---------- info list (why/where/when) ---------- */
.info-list{
  display:grid;
  gap:14px;
  margin:1.5em 0;
}
.info-list li{
  background:var(--green-100);
  border-radius:var(--radius-sm);
  padding:14px 18px;
}
.info-list strong{
  display:block;
  color:var(--green-800,var(--green-700));
  font-size:.78rem;
  text-transform:uppercase;
  letter-spacing:.06em;
  margin-bottom:.25em;
}

/* ---------- module list ---------- */
.module-list{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin:1.5em 0;
}
.module-list li{
  background:#fff;
  border:1px solid var(--border);
  padding:.6em 1.1em;
  border-radius:999px;
  font-weight:500;
  font-size:.9rem;
  color:var(--green-700);
}

/* ---------- pricing banner ---------- */
.pricing-banner{
  background:var(--gradient-brand);
  color:#fff;
  border-radius:var(--radius-lg);
  padding:36px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
}
.pricing-banner h3{color:#fff;margin-bottom:.2em;}
.pricing-banner p{color:#eafff2;margin:0;}

/* ---------- forms ---------- */
.form-wrap{
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:36px;
  box-shadow:var(--shadow);
}
.form-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:18px;
}
.form-grid .full{grid-column:1/-1;}
label{
  display:block;
  font-weight:600;
  font-size:.85rem;
  margin-bottom:.4em;
  color:var(--green-900);
}
input,select,textarea{
  width:100%;
  padding:.75em .9em;
  border:1.5px solid var(--border);
  border-radius:var(--radius-sm);
  font-family:inherit;
  font-size:.95rem;
  background:#fbfdfc;
  transition:border-color .15s ease,box-shadow .15s ease;
}
input:focus,select:focus,textarea:focus{
  outline:none;
  border-color:var(--green-500);
  box-shadow:0 0 0 3px rgba(47,174,109,.18);
}
textarea{resize:vertical;min-height:110px;}
.form-note{
  font-size:.82rem;
  color:var(--muted);
  margin-top:1em;
}
/* spam honeypot field: hidden from real visitors, left open for bots */
.hp-field{
  position:absolute;
  left:-9999px;
  width:1px;
  height:1px;
  overflow:hidden;
}
.form-side{
  display:flex;
  flex-direction:column;
  gap:20px;
}
.split{
  display:grid;
  grid-template-columns:1.2fr .8fr;
  gap:32px;
  align-items:start;
}

/* ---------- CTA band ---------- */
.cta-band{
  background:var(--green-900);
  color:#fff;
  text-align:center;
  padding:56px 0;
}
.cta-band h2{color:#fff;}
.cta-band p{color:#dcefe4;max-width:56ch;margin:0 auto 1.5em;}

/* ---------- footer ---------- */
.site-footer{
  background:var(--green-900);
  color:#cfe7db;
  padding:48px 0 20px;
}
.footer-inner{
  display:flex;
  justify-content:space-between;
  gap:32px;
  flex-wrap:wrap;
  padding-bottom:28px;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.footer-brand .logo{color:#fff;}
.footer-brand p{color:#a9cdba;max-width:32ch;margin-top:.6em;}
.footer-links h4{
  color:#fff;
  font-family:'Poppins',sans-serif;
  font-size:.9rem;
  text-transform:uppercase;
  letter-spacing:.06em;
  margin-bottom:1em;
}
.footer-links a{
  display:block;
  color:#bfe0cd;
  margin-bottom:.6em;
  font-size:.92rem;
}
.footer-links a:hover{color:#fff;}
.footer-bottom{
  padding-top:20px;
  font-size:.8rem;
  color:#8fb6a1;
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:8px;
}

/* ---------- utilities ---------- */
.text-center{text-align:center;}
.mt-0{margin-top:0;}
.badge-soon{
  display:inline-block;
  background:var(--blue-100);
  color:var(--blue-700);
  font-size:.75rem;
  font-weight:600;
  padding:.3em .8em;
  border-radius:999px;
}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .grid-4{grid-template-columns:repeat(2,1fr);}
  .grid-3{grid-template-columns:repeat(2,1fr);}
  .split{grid-template-columns:1fr;}
  .hero-inner{grid-template-columns:1fr;text-align:left;}
  .hero-media{order:-1;}
}

@media (max-width:720px){
  .site-nav{
    position:absolute;
    top:100%;left:0;right:0;
    background:#fff;
    flex-direction:column;
    align-items:flex-start;
    padding:20px 24px;
    gap:16px;
    border-bottom:1px solid var(--border);
    box-shadow:var(--shadow);
    display:none;
  }
  .site-nav.open{display:flex;}
  .nav-toggle{display:flex;}
  .grid-2,.grid-3,.grid-4,.logo-grid{grid-template-columns:1fr;}
  .form-grid{grid-template-columns:1fr;}
  .pricing-banner{flex-direction:column;text-align:center;}
  .footer-inner{flex-direction:column;}
}