/* =========================================================
   NRG Company — Design System
   Stile ispirato a tua-energia.it, identità NRG Company.
   I colori del brand sono variabili CSS: sostituisci gli HEX
   con quelli ufficiali NRG quando li hai a disposizione.
   ========================================================= */

:root {
  /* --- Brand NRG (modificabili) --- */
  --nrg-green:        #45bd67;   /* verde brand NRG ufficiale (da logo SVG) */
  --nrg-green-dark:   #2f9e50;
  --nrg-navy:         #0e2433;   /* blu profondo testi/footer */
  --nrg-navy-soft:    #16344a;
  --nrg-accent:       #ffb300;   /* giallo/oro per accenti e CTA secondarie */

  /* --- Neutri --- */
  --ink:        #14202b;
  --body:       #41525e;
  --muted:      #7b8a95;
  --line:       #e6ebee;
  --bg:         #ffffff;
  --bg-soft:    #f4f8f6;
  --bg-soft-2:  #eef4f1;

  /* --- Layout --- */
  --maxw: 1180px;
  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 18px 50px -24px rgba(14,36,51,.28);
  --shadow-sm: 0 8px 24px -14px rgba(14,36,51,.30);
  --font: "Poppins", "Segoe UI", system-ui, -apple-system, Arial, sans-serif;
}

/* ---------- Reset ---------- */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--body);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1,h2,h3,h4 { color: var(--ink); line-height: 1.15; font-weight: 700; }
h1 { font-size: clamp(2.1rem, 5vw, 3.4rem); }
h2 { font-size: clamp(1.7rem, 3.5vw, 2.5rem); }
h3 { font-size: 1.25rem; }
p { margin-bottom: 1rem; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: 84px 0; }
.section--soft { background: var(--bg-soft); }
.center { text-align: center; }
.lead { font-size: 1.12rem; color: var(--body); max-width: 720px; }
.center .lead { margin-inline: auto; }

.eyebrow {
  display: inline-block;
  font-size: .82rem; font-weight: 700; letter-spacing: .14em;
  text-transform: uppercase; color: var(--nrg-green);
  margin-bottom: 14px;
}
.section-head { max-width: 760px; margin: 0 auto 52px; text-align: center; }
.section-head p { color: var(--muted); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 28px; border-radius: 999px;
  font-weight: 600; font-size: .98rem; cursor: pointer;
  border: 2px solid transparent; transition: .2s ease;
}
.btn--primary { background: var(--nrg-green); color: #fff; }
.btn--primary:hover { background: var(--nrg-green-dark); transform: translateY(-2px); }
.btn--ghost { background: transparent; color: var(--nrg-green); border-color: var(--nrg-green); }
.btn--ghost:hover { background: var(--nrg-green); color: #fff; }
.btn--light { background: #fff; color: var(--nrg-navy); }
.btn--light:hover { transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.btn--accent { background: var(--nrg-accent); color: var(--nrg-navy); }
.btn--accent:hover { transform: translateY(-2px); filter: brightness(1.03); }

/* ---------- Header ---------- */
.topbar {
  background: var(--nrg-navy); color: #cfe0ea;
  font-size: .85rem;
}
.topbar .container { display: flex; justify-content: space-between; align-items: center; gap: 16px; height: 40px; }
.topbar a { color: #fff; font-weight: 600; }
.topbar .topbar__contacts { display: flex; gap: 22px; flex-wrap: wrap; }

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; height: 78px; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 800; color: var(--nrg-navy); font-size: 1.25rem; }
.brand .logo-mark {
  width: 40px; height: 40px; border-radius: 11px;
  background: linear-gradient(135deg, var(--nrg-green), var(--nrg-green-dark));
  display: grid; place-items: center; color: #fff; font-weight: 800; font-size: 1.05rem;
  box-shadow: var(--shadow-sm);
}
.brand small { display:block; font-size:.62rem; letter-spacing:.18em; color: var(--nrg-green); font-weight:700; }
.brand .logo-img { height: 44px; width: auto; display: block; }
.site-footer .logo-img--footer { height: 40px; margin-bottom: 4px; }

.nav { display: flex; align-items: center; gap: 28px; }
.nav a { font-weight: 600; color: var(--ink); font-size: .96rem; position: relative; }
.nav a:hover { color: var(--nrg-green); }
.nav a.active { color: var(--nrg-green); }
.nav-actions { display: flex; align-items: center; gap: 14px; }

.menu-toggle { display: none; background: none; border: 0; cursor: pointer; flex-direction: column; gap: 5px; }
.menu-toggle span { width: 26px; height: 3px; background: var(--nrg-navy); border-radius: 3px; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(900px 500px at 85% -10%, rgba(0,166,81,.18), transparent 60%),
    linear-gradient(135deg, #0e2433 0%, #16344a 60%, #0d3b2a 100%);
  color: #eaf3f0;
}
.hero .container { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; padding-top: 84px; padding-bottom: 84px; }
.hero h1 { color: #fff; }
.hero h1 span { color: var(--nrg-green); }
.hero p { color: #c5d6df; font-size: 1.15rem; max-width: 520px; }
.hero .hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 26px; }
.hero .hero-badges { display: flex; gap: 26px; margin-top: 38px; flex-wrap: wrap; }
.hero .hero-badges div b { display: block; font-size: 1.8rem; color: #fff; }
.hero .hero-badges div span { font-size: .85rem; color: #9fb6c2; }
.hero-art {
  border-radius: 24px; overflow: hidden;
  background: linear-gradient(160deg, rgba(255,255,255,.08), rgba(255,255,255,.02));
  border: 1px solid rgba(255,255,255,.12);
  padding: 30px; box-shadow: var(--shadow);
}
.hero-art .card {
  background: #fff; color: var(--ink); border-radius: 16px; padding: 22px;
  box-shadow: 0 18px 40px -22px rgba(0,0,0,.5);
}
.hero-art .card + .card { margin-top: 16px; }
.hero-art .card h4 { color: var(--nrg-green-dark); margin-bottom: 4px; }
.hero-art .card p { margin: 0; font-size: .92rem; color: var(--muted); }
.hero-art .bill-row { display:flex; justify-content:space-between; padding:8px 0; border-bottom:1px dashed var(--line); font-size:.92rem; }
.hero-art .bill-row:last-child { border:0; font-weight:700; color: var(--nrg-green-dark); }

/* ---------- Feature grid ---------- */
.grid { display: grid; gap: 26px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--5 { grid-template-columns: repeat(5, 1fr); }

.feature {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 26px; transition: .25s ease;
}
.feature:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: transparent; }
.feature .ico {
  width: 56px; height: 56px; border-radius: 14px; display: grid; place-items: center;
  background: var(--bg-soft-2); color: var(--nrg-green-dark); margin-bottom: 18px;
}
.feature .ico svg { width: 28px; height: 28px; }
.feature h3 { margin-bottom: 8px; }
.feature p { color: var(--muted); font-size: .96rem; margin: 0; }

/* ---------- Split / alternating ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.split.reverse .split__media { order: 2; }
.split__media {
  border-radius: var(--radius); min-height: 340px;
  background: linear-gradient(160deg, var(--nrg-green), var(--nrg-navy));
  position: relative; overflow: hidden; box-shadow: var(--shadow);
}
.split__media .glow { position:absolute; inset:0; background: radial-gradient(400px 200px at 30% 20%, rgba(255,255,255,.25), transparent 60%); }
.checklist { list-style: none; margin: 22px 0; }
.checklist li { display: flex; gap: 12px; align-items: flex-start; margin-bottom: 14px; }
.checklist li::before {
  content: "✓"; flex: 0 0 24px; width: 24px; height: 24px; border-radius: 50%;
  background: var(--nrg-green); color: #fff; display: grid; place-items: center;
  font-size: .8rem; font-weight: 700; margin-top: 2px;
}

/* ---------- Product cards ---------- */
.product {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 34px; display: flex; flex-direction: column; gap: 14px; transition:.25s;
  position: relative; overflow: hidden;
}
.product::after { content:""; position:absolute; top:0; left:0; right:0; height:5px; background: linear-gradient(90deg, var(--nrg-green), var(--nrg-accent)); }
.product:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.product .tag { font-size:.78rem; font-weight:700; letter-spacing:.1em; text-transform:uppercase; color: var(--nrg-green); }
.product h3 { font-size: 1.5rem; }
.product .price { font-size: 2rem; font-weight: 800; color: var(--nrg-navy); }
.product .price small { font-size: .9rem; font-weight: 500; color: var(--muted); }
.product ul { list-style:none; }
.product ul li { padding: 7px 0; border-bottom: 1px solid var(--line); font-size: .94rem; }
.product .btn { margin-top: auto; justify-content: center; }

/* ---------- Testimonials ---------- */
.quote {
  background:#fff; border:1px solid var(--line); border-radius: var(--radius);
  padding: 30px; box-shadow: var(--shadow-sm);
}
.quote .stars { color: var(--nrg-accent); letter-spacing: 2px; margin-bottom: 12px; }
.quote p { font-style: italic; color: var(--ink); }
.quote .who { font-weight: 700; color: var(--nrg-green-dark); margin-top: 10px; }

/* ---------- CTA band ---------- */
.cta-band {
  background: linear-gradient(135deg, var(--nrg-green-dark), var(--nrg-navy));
  color: #fff; border-radius: 26px; padding: 56px; text-align: center;
  box-shadow: var(--shadow);
}
.cta-band h2 { color:#fff; }
.cta-band p { color: #d4e6dd; max-width: 620px; margin: 12px auto 26px; }

/* ---------- Page hero (interne) ---------- */
.page-hero {
  background:
    radial-gradient(700px 320px at 90% -20%, rgba(0,166,81,.22), transparent 60%),
    linear-gradient(135deg, #0e2433, #16344a);
  color:#fff; padding: 64px 0;
}
.page-hero h1 { color:#fff; }
.page-hero p { color:#c5d6df; max-width: 640px; }
.breadcrumb { font-size:.85rem; color:#9fb6c2; margin-bottom: 14px; }
.breadcrumb a { color: var(--nrg-green); }

/* ---------- Contact ---------- */
.contact-grid { display:grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.contact-card { display:flex; gap:16px; align-items:flex-start; padding: 22px; border:1px solid var(--line); border-radius: var(--radius-sm); margin-bottom:16px; }
.contact-card .ico { flex:0 0 46px; width:46px; height:46px; border-radius:12px; background: var(--bg-soft-2); color: var(--nrg-green-dark); display:grid; place-items:center; }
.contact-card h4 { margin-bottom:2px; }
.contact-card p, .contact-card a { font-size:.95rem; color: var(--muted); }
.form-field { margin-bottom: 18px; }
.form-field label { display:block; font-weight:600; color: var(--ink); margin-bottom:6px; font-size:.92rem; }
.form-field input, .form-field textarea, .form-field select {
  width:100%; padding: 13px 15px; border:1px solid var(--line); border-radius: 12px;
  font-family: inherit; font-size:.96rem; background: var(--bg-soft); color: var(--ink);
}
.form-field input:focus, .form-field textarea:focus, .form-field select:focus { outline:2px solid var(--nrg-green); border-color: transparent; background:#fff; }
.form-row { display:grid; grid-template-columns:1fr 1fr; gap:18px; }

/* ---------- Footer ---------- */
.site-footer { background: var(--nrg-navy); color: #aebecb; padding: 64px 0 24px; font-size:.92rem; }
.site-footer h4 { color:#fff; font-size:1rem; margin-bottom:16px; }
.site-footer a { color:#aebecb; }
.site-footer a:hover { color:#fff; }
.footer-grid { display:grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 36px; }
.footer-grid ul { list-style:none; }
.footer-grid ul li { margin-bottom:9px; }
.footer-brand .brand { color:#fff; margin-bottom:14px; }
.footer-bottom { border-top:1px solid rgba(255,255,255,.12); margin-top:40px; padding-top:20px; display:flex; justify-content:space-between; gap:16px; flex-wrap:wrap; font-size:.85rem; color:#8398a6; }
.footer-bottom a { color:#8398a6; }
.badges-row { display:flex; gap:14px; margin-top:14px; }
.badges-row span { background: rgba(255,255,255,.08); border:1px solid rgba(255,255,255,.12); padding:6px 12px; border-radius:8px; font-size:.75rem; }

/* ---------- Offerte (catalogo, stile card verdi) ---------- */
.offers-filter { display:flex; align-items:center; gap:12px; flex-wrap:wrap; margin-bottom:34px; }
.offers-filter .flabel { font-weight:600; color:var(--muted); font-size:.95rem; }
.filter-btn {
  border:1px solid var(--line); background:#fff; color:var(--ink);
  padding:9px 20px; border-radius:999px; font-family:inherit; font-weight:600; font-size:.9rem; cursor:pointer; transition:.2s;
}
.filter-btn:hover { border-color:var(--nrg-green); color:var(--nrg-green-dark); }
.filter-btn.active { background:var(--nrg-green); color:#fff; border-color:var(--nrg-green); }

.offers-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:22px; align-items:start; }

.offer-card {
  background:linear-gradient(180deg, var(--nrg-green) 0%, var(--nrg-green-dark) 100%);
  border-radius:18px; padding:26px 22px; color:#fff; display:flex; flex-direction:column; gap:14px;
  box-shadow:var(--shadow-sm); transition:.25s;
}
.offer-card:hover { transform:translateY(-4px); box-shadow:var(--shadow); }
.offer-card .type-badge {
  align-self:flex-end; background:rgba(255,255,255,.18); border:1px solid rgba(255,255,255,.35);
  font-size:.68rem; font-weight:700; letter-spacing:.06em; text-transform:uppercase; padding:5px 11px; border-radius:999px;
}
.offer-card .tagline { text-align:center; font-weight:600; font-size:.92rem; min-height:2.4em; }
.offer-card .oname { display:flex; align-items:center; gap:8px; font-size:1.35rem; font-weight:800; }
.offer-card .oname::before { content:"⚡"; }
.offer-card.gas .oname::before { content:"🔥"; }
.offer-card .sub { font-size:.72rem; font-weight:700; letter-spacing:.05em; text-transform:uppercase; opacity:.9; }
.offer-card .price-row {
  background:rgba(255,255,255,.12); border-radius:12px; padding:12px 14px;
  display:flex; justify-content:space-between; align-items:center; gap:10px;
}
.offer-card .price-row .lbl { font-size:.82rem; opacity:.95; }
.offer-card .price-row .val { font-size:1.15rem; font-weight:800; white-space:nowrap; }
.offer-card .price-row .val small { font-size:.7rem; font-weight:600; opacity:.85; }
.offer-card .btn-detail {
  margin-top:6px; text-align:center; background:#fff; color:var(--nrg-green-dark);
  padding:12px; border-radius:999px; font-weight:700; transition:.2s;
}
.offer-card .btn-detail:hover { transform:translateY(-2px); box-shadow:0 10px 20px -10px rgba(0,0,0,.4); }
.offer-card.soon { background:linear-gradient(180deg,#8fa6ad,#6f858c); }
.offer-card.soon .btn-detail { background:rgba(255,255,255,.85); color:#4a5a60; }

/* ---------- Offerta: pagina di dettaglio ---------- */
.offer-detail { display:grid; grid-template-columns:1.6fr 1fr; gap:40px; align-items:start; }
.spec-table { width:100%; border-collapse:collapse; border:1px solid var(--line); border-radius:12px; overflow:hidden; }
.spec-table th, .spec-table td { text-align:left; padding:12px 15px; border-bottom:1px solid var(--line); font-size:.94rem; vertical-align:top; }
.spec-table th { background:var(--bg-soft-2); color:var(--ink); width:40%; font-weight:600; }
.spec-table tr:last-child th, .spec-table tr:last-child td { border-bottom:0; }
.cost-table { width:100%; border-collapse:collapse; margin-top:8px; }
.cost-table th, .cost-table td { padding:10px 14px; border-bottom:1px solid var(--line); font-size:.92rem; }
.cost-table thead th { background:var(--nrg-navy); color:#fff; }
.cost-table td:last-child, .cost-table th:last-child { text-align:right; font-weight:600; }
.download-card {
  border:1px solid var(--line); border-radius:14px; padding:18px; margin-bottom:14px;
  display:flex; align-items:center; gap:14px; transition:.2s; background:#fff;
}
.download-card:hover { border-color:var(--nrg-green); box-shadow:var(--shadow-sm); }
.download-card .doc-ico { flex:0 0 44px; width:44px; height:44px; border-radius:11px; background:var(--bg-soft-2); color:var(--nrg-green-dark); display:grid; place-items:center; font-weight:800; font-size:.72rem; }
.download-card h4 { font-size:.98rem; margin-bottom:2px; }
.download-card p { margin:0; font-size:.82rem; color:var(--muted); }
.download-card .dl { margin-left:auto; color:var(--nrg-green-dark); font-weight:700; font-size:.85rem; white-space:nowrap; }
.info-box { position:sticky; top:100px; background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:26px; box-shadow:var(--shadow-sm); }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .hero .container, .split, .contact-grid, .offer-detail { grid-template-columns: 1fr; }
  .offers-grid { grid-template-columns: repeat(2, 1fr); }
  .info-box { position: static; }
  .split.reverse .split__media { order: 0; }
  .grid--3, .grid--5 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav, .nav-actions .btn { display: none; }
  .menu-toggle { display: flex; }
  .nav.open { display: flex; position: absolute; top: 78px; left: 0; right: 0;
    flex-direction: column; background:#fff; padding: 22px; gap:16px;
    border-bottom:1px solid var(--line); box-shadow: var(--shadow); }
  .topbar .topbar__contacts span:first-child { display:none; }
}
@media (max-width: 560px) {
  .grid--3, .grid--5, .grid--2, .form-row, .offers-grid { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
  .cta-band { padding: 38px 22px; }
  .hero .hero-badges { gap: 18px; }
}