/* IntriEnergy — responsive design system */
:root{
  --bg:#f7faf7; --card:#ffffff; --line:#e2eae2; --text:#14251c; --muted:#5c7266;
  --accent:#197c4a; --accent2:#2a9660; --amber:#e8a13c; --radius:16px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.7}
.wrap{max-width:1140px;margin:0 auto;padding:0 28px}

/* ── Header / nav ───────────────────────────── */
.nav{position:sticky;top:0;z-index:100;background:var(--bg);border-bottom:1px solid var(--line)}
.nav-main{display:flex;align-items:center;justify-content:space-between;height:64px;padding:0 12px}
.logo{font-size:1.15rem;font-weight:700;color:var(--text);letter-spacing:.02em}
.logo span{color:var(--accent)}
.burger{display:none;background:transparent;border:1px solid var(--line);border-radius:8px;width:46px;height:46px;flex-direction:column;justify-content:center;align-items:center;gap:6px;cursor:pointer;padding:0;color:var(--text)}
.burger-line{display:block;width:24px;height:2.5px;background:currentColor;border-radius:2px}

/* ── Hero ──────────────────────────────────── */
.hero{position:relative;overflow:hidden;padding:100px 0 84px;background:linear-gradient(160deg,#14251c 0%,#1f5c35 100%)}
.hero .kicker{display:inline-block;color:#a9d5b5;font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;font-weight:600;margin-bottom:18px;border:1px solid #2a4a36;padding:6px 14px;border-radius:100px}
.hero h1{font-size:clamp(2rem,5vw,3.2rem);line-height:1.12;max-width:820px;font-weight:700;letter-spacing:-.02em;color:#fff}
.hero p{font-size:1.16rem;color:#cfe3d4;max-width:660px;margin-top:20px}
.hero .stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:18px;margin-top:38px}
.hero .stat{background:rgba(255,255,255,.06);border:1px solid #2a4a36;border-radius:var(--radius);padding:18px}
.hero .stat .num{font-size:2rem;font-weight:700;color:var(--amber)}
.hero .stat .lbl{color:#cfe3d4;font-size:.86rem;margin-top:4px}
.hero .actions{margin-top:32px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:15px 30px;border-radius:10px;text-decoration:none;font-weight:700;font-size:1rem;cursor:pointer}
.btn-primary{background:var(--amber);color:#14251c;border:none}
.btn-primary:hover{background:#d18f2e;transform:translateY(-1px)}
.btn-ghost{background:transparent;color:#fff;border:1px solid #2a4a36}
.btn-ghost:hover{border-color:var(--amber);color:var(--amber)}

/* ── Sections ──────────────────────────────── */
section{padding:96px 0}
section.alt{background:linear-gradient(180deg,#eef5ee,#e7f0e7)}
.label{font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);font-weight:600;margin-bottom:14px}
h2{font-size:clamp(1.8rem,3.5vw,2.4rem);letter-spacing:-.02em;line-height:1.15}
.lede{color:var(--muted);font-size:1.08rem;max-width:720px;margin-top:16px}
.grid{display:grid;gap:22px;margin-top:46px}
.g3{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.g2{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:30px}
.card h3{font-size:1.08rem;margin-bottom:10px;color:var(--accent)}
.card p{color:var(--muted);font-size:.97rem}
.card .big{font-size:2.2rem;font-weight:700;color:var(--text);margin-bottom:4px}

.patent{background:#14251c;color:#fff;border:1px solid #2a4a36;border-radius:var(--radius);padding:30px;margin-top:40px;font-size:.97rem}
.patent strong{color:var(--amber)}
.patent .lbl{color:#a9d5b5;letter-spacing:.1em;text-transform:uppercase;font-size:.78rem;font-weight:600}

.team{display:grid;gap:22px;margin-top:46px}
.team-member{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.team-member .name{font-size:1.1rem;font-weight:600}
.team-member .role{color:var(--accent);font-size:.88rem;font-weight:600;margin-top:2px}
.team-member .bio{color:var(--muted);font-size:.94rem;margin-top:10px}

.cta-band{background:linear-gradient(160deg,#14251c,#2a6b45);border-radius:20px;padding:56px;text-align:center;margin-top:90px;color:#fff}
.cta-band h2{max-width:640px;margin:0 auto}
.cta-band p{color:#cfe3d4;max-width:560px;margin:16px auto 0}
.cta-band .actions{margin-top:30px}

.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:22px;margin-top:46px}
.contact-box{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.contact-box h3{color:var(--accent);font-size:.9rem;letter-spacing:.1em;text-transform:uppercase;margin-bottom:10px}
.contact-box p,.contact-box a{color:var(--text);font-size:1rem}
.contact-box a{text-decoration:none}
.contact-box a:hover{color:var(--accent)}

footer{border-top:1px solid var(--line);padding:36px 0;color:var(--muted);font-size:.85rem}
.footer-inner{display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px}
.footer-inner a{color:var(--muted)}

/* ── Responsive: hamburger on mobile, full row on desktop ─────── */
@media(min-width:821px){
  .nav-links{display:flex;align-items:center;gap:6px}
  .nav-links a{color:var(--muted);text-decoration:none;font-size:.95rem;padding:9px 15px;border-radius:8px}
  .nav-links a:hover{color:var(--text);background:#eef3ee}
  .nav-links a.cta{color:#fff;background:var(--accent);font-weight:600;border-radius:8px}
  .nav-links a.cta:hover{background:#15683f}
}
@media(max-width:820px){
  .nav-links{display:none;position:absolute;top:64px;left:0;right:0;background:var(--bg);border-bottom:1px solid var(--line);flex-direction:column;padding:10px 18px;z-index:99}
  .nav-links.open{display:flex}
  .nav-links a{color:var(--text);text-decoration:none;font-size:1.05rem;padding:13px 16px;border-radius:10px;display:block}
  .nav-links a:hover{background:var(--card)}
  .nav-links a.cta{color:#fff;background:var(--accent);font-weight:600;text-align:center}
  .burger{display:flex}
  section{padding:64px 0}
  .cta-band{padding:36px 22px}
  .hero{padding:72px 0 56px}
  .hero h1{font-size:2.05rem}
}