/* ================================================================
   CARBONPILOT Design System v2 — 2026
   ================================================================ */
:root{
  /* Brand */
  --green-950:#022c1a;--green-900:#03422a;--green-800:#04593a;--green-700:#036d37;
  --green-600:#048a45;--green-500:#0aa855;--green-400:#1dcc6a;--green-300:#5ee49a;
  --green-100:#d3f8e4;--green-50:#e9fbf2;
  --ink-900:#0b1220;--ink-800:#151e2e;--ink-700:#243044;--ink-600:#3b4a61;
  --ink-500:#5b6b83;--ink-400:#8494ab;--ink-300:#b7c2d2;--ink-200:#dde3ec;
  --ink-100:#eef1f6;--ink-50:#f7f9fc;
  --amber:#f59e0b;--white:#fff;
  /* Typography */
  --font:system-ui,-apple-system,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
  --step--1:clamp(.83rem, .8rem + .15vw, .92rem);
  --step-0:clamp(1rem, .96rem + .2vw, 1.125rem);
  --step-1:clamp(1.15rem, 1.08rem + .35vw, 1.35rem);
  --step-2:clamp(1.4rem, 1.26rem + .7vw, 1.8rem);
  --step-3:clamp(1.8rem, 1.5rem + 1.4vw, 2.6rem);
  --step-4:clamp(2.3rem, 1.8rem + 2.6vw, 3.8rem);
  /* Layout */
  --wrap:1180px;--radius:16px;--radius-lg:24px;
  --shadow-sm:0 1px 2px rgba(11,18,32,.05),0 2px 8px rgba(11,18,32,.04);
  --shadow-md:0 2px 6px rgba(11,18,32,.05),0 12px 32px rgba(11,18,32,.08);
  --shadow-lg:0 4px 12px rgba(11,18,32,.06),0 24px 64px rgba(11,18,32,.12);
  --ease:cubic-bezier(.22,1,.36,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:90px}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{font-family:var(--font);font-size:var(--step-0);line-height:1.65;color:var(--ink-700);
  background:var(--white);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
::selection{background:var(--green-100);color:var(--green-900)}
img,svg{display:block;max-width:100%}
a{color:var(--green-600);text-decoration:none}
a:hover{color:var(--green-700)}
h1,h2,h3,h4{color:var(--ink-900);line-height:1.15;font-weight:800;letter-spacing:-.02em}
h1{font-size:var(--step-4)}h2{font-size:var(--step-3)}h3{font-size:var(--step-1)}
strong{color:var(--ink-800)}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.skip-link{position:absolute;left:-999px;top:8px;z-index:200;background:var(--green-700);color:#fff;
  padding:10px 18px;border-radius:10px}
.skip-link:focus{left:8px;color:#fff}
:focus-visible{outline:3px solid var(--green-400);outline-offset:2px;border-radius:4px}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:var(--step-0);
  padding:14px 28px;border-radius:999px;border:1.5px solid transparent;cursor:pointer;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .2s;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--green-600),var(--green-500));color:#fff;
  box-shadow:0 4px 16px rgba(4,138,69,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(4,138,69,.45);color:#fff}
.btn-ghost{background:transparent;color:var(--ink-800);border-color:var(--ink-200)}
.btn-ghost:hover{border-color:var(--green-500);color:var(--green-700);transform:translateY(-2px)}
.btn-light{background:#fff;color:var(--green-800)}
.btn-light:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);color:var(--green-900)}
.btn-sm{padding:10px 20px;font-size:var(--step--1)}
.btn .arr{transition:transform .25s var(--ease)}
.btn:hover .arr{transform:translateX(3px)}

/* ---------- Header ---------- */
.site-header{position:fixed;inset:0 0 auto;z-index:100;transition:background .3s,box-shadow .3s,border-color .3s;
  border-bottom:1px solid transparent}
.site-header.scrolled{background:rgba(255,255,255,.82);backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);border-color:var(--ink-100);box-shadow:0 1px 0 rgba(11,18,32,.03)}
.nav{display:flex;align-items:center;justify-content:space-between;height:76px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.35rem;
  letter-spacing:-.03em;color:var(--ink-900)}
.brand:hover{color:var(--ink-900)}
.brand .mark{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--green-700),var(--green-500));
  display:grid;place-items:center;box-shadow:0 3px 10px rgba(4,138,69,.35)}
.brand .mark svg{width:20px;height:20px}
.brand em{font-style:normal;color:var(--green-600)}
.nav-links{display:flex;align-items:center;gap:32px;list-style:none}
.nav-links a{color:var(--ink-600);font-weight:500;font-size:.98rem;position:relative}
.nav-links a:hover,.nav-links a[aria-current]{color:var(--ink-900)}
.nav-links a[aria-current]::after{content:'';position:absolute;left:0;right:0;bottom:-6px;height:2px;
  border-radius:2px;background:var(--green-500)}
.nav-cta{display:flex;align-items:center;gap:12px}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--ink-800);margin:5px 0;
  border-radius:2px;transition:.3s var(--ease)}
@media(max-width:920px){
  .nav-links,.nav-cta .btn-ghost{display:none}
  .nav-toggle{display:block}
  .nav.open .nav-links{display:flex;position:absolute;top:76px;left:0;right:0;flex-direction:column;
    background:#fff;padding:24px;gap:20px;border-bottom:1px solid var(--ink-100);box-shadow:var(--shadow-lg)}
  .nav.open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav.open .nav-toggle span:nth-child(2){opacity:0}
  .nav.open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
}

/* ---------- Hero ---------- */
.hero{position:relative;padding:170px 0 90px;overflow:hidden;
  background:radial-gradient(1100px 520px at 78% -10%,var(--green-50) 0%,transparent 60%),
             radial-gradient(800px 400px at -10% 20%,#eef7ff 0%,transparent 55%),var(--white)}
.hero::after{content:'';position:absolute;inset:auto 0 0;height:1px;
  background:linear-gradient(90deg,transparent,var(--ink-200),transparent)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center}
@media(max-width:980px){.hero-grid{grid-template-columns:1fr}.hero{padding-top:140px}}
.eyebrow{display:inline-flex;align-items:center;gap:8px;background:var(--green-50);
  border:1px solid var(--green-100);color:var(--green-800);font-weight:600;font-size:.88rem;
  padding:7px 16px;border-radius:999px;margin-bottom:24px}
.eyebrow .dot{width:8px;height:8px;border-radius:50%;background:var(--green-500);
  animation:pulse 2.4s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(10,168,85,.5)}55%{box-shadow:0 0 0 7px rgba(10,168,85,0)}}
.hero h1{margin-bottom:22px}
.hero h1 .hl{background:linear-gradient(120deg,var(--green-600),var(--green-400));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lede{font-size:var(--step-1);color:var(--ink-500);max-width:34em;margin-bottom:34px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px}
.hero-trust{display:flex;flex-wrap:wrap;gap:20px;color:var(--ink-500);font-size:.9rem}
.hero-trust span{display:inline-flex;align-items:center;gap:7px}
.hero-trust svg{width:16px;height:16px;color:var(--green-500)}

/* Product mock */
.mock{position:relative;border-radius:var(--radius-lg);background:#fff;border:1px solid var(--ink-100);
  box-shadow:var(--shadow-lg);overflow:hidden;transform:perspective(1200px) rotateY(-4deg) rotateX(2deg)}
@media(max-width:980px){.mock{transform:none}}
.mock-bar{display:flex;align-items:center;gap:6px;padding:12px 16px;border-bottom:1px solid var(--ink-100);
  background:var(--ink-50)}
.mock-bar i{width:10px;height:10px;border-radius:50%;background:var(--ink-200)}
.mock-bar i:first-child{background:#fca5a5}.mock-bar i:nth-child(2){background:#fcd34d}
.mock-bar i:nth-child(3){background:var(--green-300)}
.mock-body{padding:20px;display:grid;gap:14px}
.mock-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.mock-card{border:1px solid var(--ink-100);border-radius:12px;padding:14px;background:#fff}
.mock-card .k{font-size:.72rem;font-weight:600;color:var(--ink-400);text-transform:uppercase;letter-spacing:.06em}
.mock-card .v{font-size:1.5rem;font-weight:800;color:var(--ink-900);letter-spacing:-.02em}
.mock-card .v em{font-style:normal;font-size:.85rem;color:var(--green-600);font-weight:700}
.mock-chart{display:flex;align-items:flex-end;gap:6px;height:74px;padding-top:8px}
.mock-chart b{flex:1;border-radius:4px 4px 0 0;background:linear-gradient(180deg,var(--green-400),var(--green-600));
  opacity:.9;animation:grow 1.2s var(--ease) both}
@keyframes grow{from{transform:scaleY(0)}to{transform:scaleY(1)}}
.mock-chart b{transform-origin:bottom}
.mock-progress{height:8px;border-radius:99px;background:var(--ink-100);overflow:hidden}
.mock-progress i{display:block;height:100%;width:82%;border-radius:99px;
  background:linear-gradient(90deg,var(--green-600),var(--green-400))}
.badge-float{position:absolute;right:-14px;top:22%;background:#fff;border:1px solid var(--ink-100);
  border-radius:14px;box-shadow:var(--shadow-md);padding:10px 16px;font-size:.85rem;font-weight:600;
  color:var(--ink-800);display:flex;gap:8px;align-items:center;animation:float 5s ease-in-out infinite}
.badge-float svg{width:18px;height:18px;color:var(--green-500)}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
@media(max-width:980px){.badge-float{display:none}}

/* ---------- Sections ---------- */
.section{padding:96px 0}
.section.tint{background:var(--ink-50)}
.section.dark{background:radial-gradient(900px 500px at 80% 0%,rgba(29,204,106,.14),transparent 55%),var(--ink-900);
  color:var(--ink-300)}
.section.dark h2,.section.dark h3{color:#fff}
.sec-head{max-width:720px;margin:0 auto 56px;text-align:center}
.sec-head .kicker{display:inline-block;font-weight:700;font-size:.85rem;letter-spacing:.12em;
  text-transform:uppercase;color:var(--green-600);margin-bottom:14px}
.sec-head p{color:var(--ink-500);font-size:var(--step-1);margin-top:16px}
.section.dark .sec-head p{color:var(--ink-300)}

/* Stats band */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
@media(max-width:860px){.stats{grid-template-columns:repeat(2,1fr)}}
.stat{text-align:center;padding:28px 16px;border-radius:var(--radius);background:#fff;
  border:1px solid var(--ink-100);box-shadow:var(--shadow-sm)}
.stat .n{font-size:var(--step-3);font-weight:800;color:var(--ink-900);letter-spacing:-.03em}
.stat .n em{font-style:normal;color:var(--green-500)}
.stat .l{color:var(--ink-500);font-size:.92rem;margin-top:4px}

/* Feature cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
@media(max-width:980px){.cards{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.cards{grid-template-columns:1fr}}
.card{position:relative;background:#fff;border:1px solid var(--ink-100);border-radius:var(--radius-lg);
  padding:32px 28px;box-shadow:var(--shadow-sm);transition:transform .3s var(--ease),box-shadow .3s var(--ease),
  border-color .3s}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--green-100)}
.card .icon{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;margin-bottom:20px;
  background:linear-gradient(135deg,var(--green-50),var(--green-100));border:1px solid var(--green-100)}
.card .icon svg{width:26px;height:26px;color:var(--green-700)}
.card h3{margin-bottom:10px}
.card p{color:var(--ink-500);font-size:.97rem}
.card .more{display:inline-flex;align-items:center;gap:6px;margin-top:16px;font-weight:600;font-size:.92rem}
.card.wide{grid-column:span 3}
@media(max-width:980px){.card.wide{grid-column:span 2}}
@media(max-width:640px){.card.wide{grid-column:span 1}}

/* Steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step}
@media(max-width:980px){.steps{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.steps{grid-template-columns:1fr}}
.step{position:relative;padding:28px;border-radius:var(--radius-lg);background:rgba(255,255,255,.045);
  border:1px solid rgba(255,255,255,.09)}
.step::before{counter-increment:step;content:counter(step,decimal-leading-zero);
  font-size:.9rem;font-weight:800;letter-spacing:.08em;color:var(--green-400)}
.step h3{margin:12px 0 8px;font-size:var(--step-1)}
.step p{font-size:.95rem;color:var(--ink-300)}
.step .bar{position:absolute;top:0;left:28px;right:28px;height:3px;border-radius:0 0 4px 4px;
  background:linear-gradient(90deg,var(--green-500),var(--green-300));opacity:.85}

/* Pricing */
.pricing{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;align-items:stretch}
@media(max-width:1080px){.pricing{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.pricing{grid-template-columns:1fr}}
.plan{position:relative;display:flex;flex-direction:column;background:#fff;border:1px solid var(--ink-100);
  border-radius:var(--radius-lg);padding:30px 26px;box-shadow:var(--shadow-sm);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease)}
.plan:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.plan.featured{border:2px solid var(--green-500);box-shadow:0 12px 40px rgba(4,138,69,.16)}
.plan .flag{position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:var(--green-600);
  color:#fff;font-size:.75rem;font-weight:700;letter-spacing:.04em;padding:5px 14px;border-radius:99px}
.plan h3{font-size:1.15rem}
.plan .aud{color:var(--ink-400);font-size:.85rem;margin:2px 0 18px}
.plan .price{font-size:2.2rem;font-weight:800;color:var(--ink-900);letter-spacing:-.03em}
.plan .price small{font-size:.95rem;color:var(--ink-400);font-weight:500}
.plan ul{list-style:none;margin:20px 0 26px;display:grid;gap:10px;flex:1}
.plan li{display:flex;gap:10px;font-size:.93rem;color:var(--ink-600)}
.plan li svg{width:18px;height:18px;flex:none;color:var(--green-500);margin-top:2px}
.plan .btn{width:100%;justify-content:center}

/* Quotes */
.quotes{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
@media(max-width:980px){.quotes{grid-template-columns:1fr}}
.quote{background:#fff;border:1px solid var(--ink-100);border-radius:var(--radius-lg);padding:30px;
  box-shadow:var(--shadow-sm);display:flex;flex-direction:column;gap:18px}
.quote .stars{color:var(--amber);letter-spacing:2px;font-size:.95rem}
.quote p{color:var(--ink-700);font-size:.98rem}
.quote footer{display:flex;align-items:center;gap:12px;font-size:.88rem;color:var(--ink-500)}
.quote .ava{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;font-weight:700;
  color:var(--green-800);background:linear-gradient(135deg,var(--green-100),var(--green-50));
  border:1px solid var(--green-100)}
.quote b{display:block;color:var(--ink-800)}

/* FAQ */
.faq{max-width:780px;margin:0 auto;display:grid;gap:14px}
.faq details{background:#fff;border:1px solid var(--ink-100);border-radius:var(--radius);
  padding:0;overflow:hidden;transition:border-color .2s}
.faq details[open]{border-color:var(--green-200,#bfead3)}
.faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;gap:16px;
  align-items:center;padding:20px 24px;font-weight:600;color:var(--ink-800)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:'+';font-size:1.4rem;font-weight:400;color:var(--green-600);
  transition:transform .25s var(--ease)}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq .a{padding:0 24px 22px;color:var(--ink-500);font-size:.97rem}

/* CTA */
.cta{position:relative;border-radius:var(--radius-lg);overflow:hidden;padding:72px 40px;text-align:center;
  background:linear-gradient(135deg,var(--green-900),var(--green-700) 55%,var(--green-600));color:#fff}
.cta::before{content:'';position:absolute;inset:0;
  background:radial-gradient(600px 300px at 85% 10%,rgba(94,228,154,.28),transparent 60%)}
.cta>*{position:relative}
.cta h2{color:#fff;margin-bottom:14px}
.cta p{color:rgba(255,255,255,.85);max-width:36em;margin:0 auto 32px;font-size:var(--step-1)}
.cta .hero-actions{justify-content:center}

/* Footer */
.site-footer{background:var(--ink-900);color:var(--ink-400);padding:72px 0 36px;font-size:.93rem}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:48px}
@media(max-width:860px){.foot-grid{grid-template-columns:1fr 1fr}}
.site-footer h4{color:#fff;font-size:.95rem;margin-bottom:16px}
.site-footer ul{list-style:none;display:grid;gap:10px}
.site-footer a{color:var(--ink-400)}
.site-footer a:hover{color:#fff}
.foot-brand p{margin-top:14px;max-width:30em}
.foot-bottom{border-top:1px solid var(--ink-800);padding-top:28px;display:flex;flex-wrap:wrap;
  gap:16px;justify-content:space-between;align-items:center}

/* Page hero (subpages) */
.page-hero{padding:160px 0 64px;background:radial-gradient(900px 420px at 80% -20%,var(--green-50),transparent 60%),var(--white);
  border-bottom:1px solid var(--ink-100)}
.page-hero .lede{color:var(--ink-500);font-size:var(--step-1);max-width:38em;margin-top:18px}

/* Prose (legal) */
.prose{max-width:780px;margin:0 auto}
.prose h2{font-size:var(--step-2);margin:44px 0 14px}
.prose h3{margin:28px 0 10px}
.prose p,.prose li{color:var(--ink-600);margin-bottom:12px}
.prose ul{padding-left:22px}

/* Alternating feature rows */
.row-feature{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;padding:56px 0}
@media(max-width:900px){.row-feature{grid-template-columns:1fr;gap:28px}}
.row-feature h2{font-size:var(--step-2);margin-bottom:14px}
.row-feature .num{font-weight:800;color:var(--green-500);letter-spacing:.1em;font-size:.9rem}
.row-feature p{color:var(--ink-500)}
.row-feature ul{list-style:none;margin-top:18px;display:grid;gap:10px}
.row-feature li{display:flex;gap:10px;color:var(--ink-600)}
.row-feature li svg{width:18px;height:18px;flex:none;color:var(--green-500);margin-top:3px}
.panel{border-radius:var(--radius-lg);border:1px solid var(--ink-100);box-shadow:var(--shadow-md);
  background:linear-gradient(160deg,var(--ink-50),#fff);padding:28px;min-height:280px;display:grid;place-items:center}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:48px;align-items:start}
@media(max-width:900px){.contact-grid{grid-template-columns:1fr}}
.form{display:grid;gap:18px;background:#fff;border:1px solid var(--ink-100);border-radius:var(--radius-lg);
  padding:34px;box-shadow:var(--shadow-md)}
.form label{font-weight:600;font-size:.9rem;color:var(--ink-800);display:grid;gap:7px}
.form input,.form select,.form textarea{font:inherit;padding:13px 16px;border:1.5px solid var(--ink-200);
  border-radius:12px;background:var(--ink-50);transition:border-color .2s,background .2s;width:100%}
.form input:focus,.form select:focus,.form textarea:focus{outline:none;border-color:var(--green-500);background:#fff}
.form .row2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media(max-width:560px){.form .row2{grid-template-columns:1fr}}
.info-card{background:#fff;border:1px solid var(--ink-100);border-radius:var(--radius-lg);padding:30px;
  box-shadow:var(--shadow-sm);display:grid;gap:20px}
.info-card .item{display:flex;gap:14px}
.info-card .item svg{width:22px;height:22px;color:var(--green-600);flex:none;margin-top:2px}
.info-card .item b{display:block;color:var(--ink-900)}

/* Reveal on scroll */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* Utility */
.mt-2{margin-top:16px}.mt-4{margin-top:32px}.center{text-align:center}
.pill-row{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.pill{background:#fff;border:1px solid var(--ink-100);border-radius:999px;padding:8px 18px;
  font-size:.9rem;font-weight:500;color:var(--ink-600);box-shadow:var(--shadow-sm)}