/* Fonte e base */
:root{
  --bg:#3d3d3d; /* grafite */
  --bg-alt:#3e3e3e;
  --text:#e8e8e8;
  --muted:#bdbdbd;
  --primary:#4cc9f0;
  --primary-900:#1e95b6;
  --card:#2f2f2f;
  --border:#3a3a3a;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif}
img{max-width:100%}

.container{max-width:1100px;margin:0 auto;padding:0 24px}
.section{padding:72px 0}
.section.alt{background:var(--bg-alt)}

/* Header */
.header{position:sticky;top:0;background:#3d3d3d;backdrop-filter:saturate(140%) blur(10px);border-bottom:1px solid var(--border);z-index:10}
.header__content{display:flex;align-items:center;justify-content:space-between;padding:14px 0}
.logo{font-weight:800;letter-spacing:.3px}
.logo span{color:var(--primary)}
.nav{display:flex;gap:18px}
.nav a{color:var(--text);text-decoration:none;font-weight:600;opacity:.9}
.nav a:hover{opacity:1;color:var(--primary)}

/* Buttons */
.btn{display:inline-block;padding:12px 18px;border-radius:10px;text-decoration:none;font-weight:700;border:1px solid transparent;transition:transform .08s ease, background .2s ease, color .2s ease}
.btn--primary{background:var(--primary);color:#062a35}
.btn--primary:hover{background:var(--primary-900);color:#fff}
.btn--outline{border-color:var(--border)}
.btn--ghost{border-color:transparent;color:var(--text)}
.btn--ghost:hover{color:var(--primary)}

/* Hero */
.hero{padding:72px 0 36px;border-bottom:1px solid var(--border)}
.hero__grid{display:grid;grid-template-columns:1.2fr .8fr;gap:28px;align-items:center}
.hero h1{font-size:40px;line-height:1.1;margin:0 0 14px}
.subtitle{font-size:18px;color:var(--muted);margin:0 0 20px}
.hero__cta{display:flex;gap:12px;margin:16px 0 10px}
.hero__bullets{list-style:none;padding:0;margin:18px 0 0;display:flex;gap:18px;flex-wrap:wrap;color:var(--muted)}

/* Decorative card */
.card.diag{background:linear-gradient(135deg,#2c2c2c,#242424);border:1px solid var(--border);border-radius:16px;padding:22px;min-height:220px;display:flex;flex-direction:column;gap:16px;box-shadow:0 10px 30px rgba(0,0,0,.25)}
.chip{align-self:flex-start;background:#121212;color:#9be3ff;border:1px solid #1b4e5a;border-radius:999px;padding:6px 10px;font-size:12px;font-weight:700}
.nodes{display:flex;gap:10px;flex-wrap:wrap}
.node{background:var(--card);border:1px dashed var(--border);padding:10px 12px;border-radius:10px;color:#cfefff}

/* Two columns */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:start}

/* KPIs */
.kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:16px}
.kpi{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:16px;text-align:center}
.kpi span{font-size:28px;font-weight:800;color:var(--primary)}
.kpi small{color:var(--muted)}

/* Cards */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:18px}
.card h3{margin:0 0 8px}
.card p{color:var(--muted)}

/* Checklist */
.feature-card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:18px}
.checklist{list-style:none;padding:0;margin:12px 0 0}
.checklist li{padding-left:26px;position:relative;margin:8px 0}
.checklist li::before{content:'✔';position:absolute;left:0;color:var(--primary)}

/* Steps */
.steps{padding-left:18px}
.steps li{margin:8px 0;color:var(--muted)}

/* Code box */
.code-box{background:#1f1f1f;border:1px solid var(--border);border-radius:12px;padding:18px}
.code-box pre{margin:0;color:#cde9f7;overflow:auto}

/* Contact */
.contact{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.contact__list{list-style:none;padding:0;color:var(--muted)}
.form{display:grid;gap:12px}
.form label{display:grid;gap:6px}
.form input, .form textarea{width:100%;padding:12px;border-radius:10px;border:1px solid var(--border);background:#1a1a1a;color:var(--text)}
.form input:focus, .form textarea:focus{outline:none;border-color:var(--primary)}
.form__actions{display:flex;gap:12px}
.form__note{color:var(--muted);font-size:12px}

/* Footer */
.footer{padding:36px 0;border-top:1px solid var(--border)}
.footer__grid{display:grid;grid-template-columns:1fr auto;align-items:center}
.footer__links{display:flex;gap:16px}
.footer__links a{color:var(--muted);text-decoration:none}
.footer__links a:hover{color:var(--primary)}
.copyright{grid-column:1 / -1;color:var(--muted);margin-top:14px}

/* Responsive */
@media (max-width:960px){
  .hero__grid, .two-col, .cards, .contact, .footer__grid{grid-template-columns:1fr}
  .cards{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .cards{grid-template-columns:1fr}
  .hero h1{font-size:32px}
}