:root {
  --bg: #0d1117;
  --bg2: #10161f;
  --card: #161b22;
  --card2: #1c2330;
  --border: #2a313c;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #2ea043;
  --accent-d: #238636;
  --danger: #f85149;
  --radius: 16px;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  background:
    radial-gradient(900px 480px at 50% -8%, #14304a33 0%, transparent 60%),
    var(--bg);
  color: var(--text);
  line-height: 1.5;
}

/* ---------- Banner de erro ---------- */
.net-banner {
  background: var(--danger); color: #fff; text-align: center;
  padding: 10px 16px; font-size: 14px;
}
.hidden { display: none !important; }

/* ---------- Topbar ---------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1000px; margin: 0 auto; padding: 16px 22px;
}
.brand { display: inline-flex; align-items: center; gap: 8px; text-decoration: none; color: var(--text); }
.brand img { height: 38px; width: auto; display: block; }
.brand-text { font-size: 22px; font-weight: 800; align-items: center; gap: 6px; }
.brand-mark { color: var(--accent); }
.topbar nav a { color: var(--muted); text-decoration: none; margin-left: 18px; font-size: 14px; }
.topbar nav a:hover { color: var(--text); }

main { max-width: 720px; margin: 0 auto; padding: 0 18px 60px; }

/* ---------- Hero ---------- */
.hero { text-align: center; padding: 26px 0 22px; }
.hero h1 { font-size: 32px; margin: 0 0 10px; letter-spacing: -.5px; }
.hero p { color: var(--muted); max-width: 520px; margin: 0 auto; }
.accent { color: var(--accent); }

/* ---------- Card ---------- */
.card {
  background: linear-gradient(180deg, var(--card) 0%, var(--bg2) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px;
  box-shadow: 0 20px 60px -30px #000;
}

/* Toggle */
.toggle { display: flex; gap: 6px; background: var(--bg2); padding: 6px; border-radius: 12px; }
.toggle-btn {
  flex: 1; padding: 13px; border: none; border-radius: 9px;
  background: transparent; color: var(--muted); font-size: 15px; font-weight: 700;
  cursor: pointer; transition: .15s;
}
.toggle-btn.active { background: var(--accent-d); color: #fff; box-shadow: 0 6px 16px -8px var(--accent); }

.panel { display: none; padding: 18px 14px 10px; }
.panel.active { display: block; }

/* Steps */
.steps { display: flex; align-items: center; gap: 10px; justify-content: center; margin: 4px 0 20px; }
.step { display: inline-flex; align-items: center; gap: 8px; color: var(--muted); font-size: 13px; font-weight: 600; }
.step b {
  display: inline-grid; place-items: center; width: 24px; height: 24px; border-radius: 50%;
  background: var(--card2); color: var(--muted); border: 1px solid var(--border); font-size: 13px;
}
.step-line { flex: 0 0 40px; height: 2px; background: var(--border); }
.steps[data-step="1"] .step:nth-child(1) b { background: var(--accent); color: #fff; border-color: var(--accent); }
.steps[data-step="2"] .step b { background: var(--accent); color: #fff; border-color: var(--accent); }
.steps[data-step="2"] .step-line { background: var(--accent); }

/* Forms */
.form-step { display: flex; flex-direction: column; gap: 14px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 13px; color: var(--muted); font-weight: 600; }
input {
  background: var(--card2); border: 1px solid var(--border); color: var(--text);
  padding: 13px; border-radius: 11px; font-size: 15px; width: 100%;
}
input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px #2ea04322; }
small { color: var(--muted); font-size: 12px; }
.hint { color: var(--accent); font-weight: 600; }

/* Coins */
.coins { display: flex; gap: 8px; flex-wrap: wrap; }
.coin-chip {
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer;
  background: var(--card2); border: 1px solid var(--border); color: var(--text);
  padding: 9px 13px; border-radius: 11px; font-size: 14px; font-weight: 600; transition: .12s;
}
.coin-chip:hover { border-color: #3a4452; }
.coin-chip.active { border-color: var(--accent); box-shadow: 0 0 0 2px #2ea04333; }
.coin-badge {
  width: 22px; height: 22px; border-radius: 50%; display: inline-grid; place-items: center;
  color: #fff; font-size: 12px; font-weight: 800;
}

/* CTA */
.cta {
  background: var(--accent-d); color: #fff; border: none; padding: 15px;
  border-radius: 11px; font-size: 16px; font-weight: 700; cursor: pointer; transition: .15s;
}
.cta:hover { background: var(--accent); }
.cta:disabled { opacity: .6; cursor: not-allowed; }
.ghost {
  background: transparent; border: 1px solid var(--border); color: var(--muted);
  padding: 11px; border-radius: 11px; cursor: pointer; margin-top: 12px; width: 100%;
}

/* Result */
.result { text-align: center; }
.result h3 { margin: 6px 0 16px; }
.qr-wrap { display: inline-block; background: #fff; padding: 10px; border-radius: 14px; }
.qr-wrap img { width: 240px; max-width: 100%; display: block; }
.copybox { display: flex; gap: 8px; margin: 14px 0; }
.copybox input { font-size: 12px; }
.copybox button {
  background: var(--card2); border: 1px solid var(--border); color: var(--text);
  padding: 0 16px; border-radius: 11px; cursor: pointer; white-space: nowrap;
}
.muted { color: var(--muted); }
.status { margin-top: 14px; padding: 12px; border-radius: 11px; background: var(--card2); font-size: 14px; }
.status.err { border: 1px solid var(--danger); color: var(--danger); }
.status.paid { background: #2ea04326; border: 1px solid var(--accent); color: var(--accent); font-weight: 700; }
.check { font-size: 48px; }
.msg-ok { background: #2ea04314; border: 1px solid var(--accent); padding: 16px; border-radius: 12px; text-align: left; }

/* Fee breakdown / note */
.fee-note { color: var(--muted); font-size: 13px; text-align: center; margin: 2px 0 0; }
.fee-note strong { color: var(--accent); }
.breakdown {
  display: flex; justify-content: space-between; gap: 8px; flex-wrap: wrap;
  background: var(--card2); border: 1px solid var(--border); border-radius: 11px;
  padding: 12px; margin: 12px 0; font-size: 13px; color: var(--muted); text-align: center;
}
.breakdown span { flex: 1; min-width: 90px; }
.breakdown b { display: block; color: var(--text); font-size: 15px; margin-top: 2px; }
.breakdown span:last-child b { color: var(--accent); }

/* Conteúdo SEO */
.content { margin-top: 46px; max-width: 680px; margin-left: auto; margin-right: auto; }
.content h2 { font-size: 20px; margin: 26px 0 8px; }
.content p { color: var(--muted); font-size: 15px; }
.content strong { color: var(--text); }

/* Features */
.features { margin-top: 46px; }
.features h2, .info h2 { font-size: 22px; text-align: center; }
.feat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 20px; }
.feat { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 18px 14px; text-align: center; }
.feat-icon { width: 46px; height: 46px; margin: 0 auto 12px; border-radius: 12px; background: #2ea04318; color: var(--accent); display: grid; place-items: center; }
.feat strong { display: block; margin-bottom: 6px; }
.feat p { color: var(--muted); font-size: 13px; margin: 0; }

/* FAQ */
.info { margin-top: 46px; }
details { background: var(--card); border: 1px solid var(--border); border-radius: 11px; padding: 14px 16px; margin: 10px auto 0; max-width: 640px; }
summary { cursor: pointer; font-weight: 600; }
details p { color: var(--muted); margin: 10px 0 0; }

/* Footer */
footer { text-align: center; padding: 40px 20px; color: var(--muted); font-size: 13px; border-top: 1px solid var(--border); margin-top: 50px; }
.foot-brand { font-size: 18px; margin-bottom: 6px; }
.disclaimer { font-size: 12px; opacity: .75; max-width: 560px; margin: 8px auto 0; }

@media (max-width: 640px) {
  .feat-grid { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 26px; }
}