:root {
  --bg: #76b900;
  --bg-soft: #4a7600;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --accent: #4a7600;
  --accent-dark: #3a5c00;
  --border: #e2e8f0;
  --radius: 12px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: #f8fafc;
  line-height: 1.6;
}

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
.wrap.narrow { max-width: 720px; }

.topbar {
  background: var(--bg);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  padding-bottom: 14px;
}
.brand { color: #fff; text-decoration: none; font-weight: 800; font-size: 1.25rem; }
.brand span { color: #d9f99d; }
.topbar nav a {
  color: #f0f8e2;
  text-decoration: none;
  margin-left: 18px;
  font-size: 0.95rem;
}
.topbar nav a:hover { color: #fff; }

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 10px 20px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}
.btn:hover { background: var(--accent-dark); }
.btn:disabled { background: #94a3b8; cursor: wait; }
.btn-small { padding: 8px 14px; font-size: 0.9rem; margin-left: 18px; }
.btn-large { padding: 14px 28px; font-size: 1.1rem; }

.hero {
  background: linear-gradient(135deg, #4a7600 0%, #76b900 100%);
  color: #fff;
  padding: 72px 0;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
  align-items: center;
}
.hero h1 { font-size: 2.4rem; line-height: 1.2; margin: 0 0 16px; }
.lede { font-size: 1.15rem; color: #f4fae6; }
.hero-cta { margin-top: 28px; }
.fine { font-size: 0.85rem; color: var(--muted); }
.hero .fine { color: #eef6e0; }

.hero-card {
  background: var(--card);
  color: var(--text);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: 0 12px 32px rgba(0,0,0,0.25);
}
.hero-card h2 { margin-top: 0; font-size: 1.2rem; }
.hero-card ul { padding-left: 20px; margin: 0; }
.hero-card li { margin-bottom: 10px; }

.section { padding: 64px 0; }
.section-alt { background: #fff; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section h2 { font-size: 1.8rem; margin-top: 0; }

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 32px;
}
.step {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.section-alt .step { background: #f8fafc; }
.num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  margin-bottom: 12px;
}
.step h3 { margin: 0 0 8px; font-size: 1.05rem; }
.step p { margin: 0; color: var(--muted); font-size: 0.95rem; }

form { margin-top: 24px; }
label { display: block; font-weight: 600; margin-bottom: 8px; }
input[type="text"] {
  width: 100%;
  padding: 14px;
  font-size: 1.1rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 2px solid var(--border);
  border-radius: 8px;
}
input[type="text"]:focus { outline: none; border-color: var(--accent); }
.hint { font-size: 0.85rem; color: var(--muted); margin-top: 6px; }
form .btn { margin-top: 16px; width: 100%; }
.error {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #b91c1c;
  border-radius: 8px;
  padding: 12px 16px;
  margin-top: 16px;
}
.success {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  color: #166534;
  border-radius: 8px;
  padding: 12px 16px;
  margin-top: 16px;
}
.manual-instructions {
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-radius: 8px;
  padding: 12px 16px;
  margin: 12px 0;
}

details {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin-bottom: 12px;
}
summary { font-weight: 600; cursor: pointer; }
details p { color: var(--muted); margin: 10px 0 0; }
details a { color: var(--accent); }

footer { background: var(--bg-soft); color: #fff; padding: 40px 0; }
.footer-inner p { margin: 6px 0; }
footer .fine { color: #dcedc8; }

/* success page */
.status-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  margin-top: 32px;
}
.cmd {
  background: var(--bg);
  color: #e2e8f0;
  border-radius: 8px;
  padding: 16px 20px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.85rem;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
  margin: 16px 0;
}
ol.instructions li { margin-bottom: 12px; }
.badge {
  display: inline-block;
  background: #dcfce7;
  color: #166534;
  border-radius: 999px;
  padding: 4px 14px;
  font-weight: 700;
  font-size: 0.9rem;
}
.badge.pending { background: #fef9c3; color: #854d0e; }
.badge.failed { background: #fee2e2; color: #991b1b; }

@media (max-width: 800px) {
  .hero-inner { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .topbar nav a:not(.btn) { display: none; }
}

/* ---- order form: double serial + payment method choice ---- */
.pay-methods {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin: 20px 0 0;
  background: #fff;
}
.pay-methods legend { font-weight: 700; padding: 0 8px; }
.pay-option {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 400;
  margin-bottom: 10px;
  cursor: pointer;
}
.pay-option input[type="radio"] { width: 18px; height: 18px; accent-color: var(--accent); }
#crypto-opts { margin-top: 12px; padding-top: 12px; border-top: 1px dashed var(--border); }
#crypto-opts select {
  width: 100%;
  padding: 12px;
  font-size: 1rem;
  border: 2px solid var(--border);
  border-radius: 8px;
  background: #fff;
}
#crypto-opts select:focus { outline: none; border-color: var(--accent); }

/* ---- success page ---- */
.btn-secondary {
  background: #fff;
  color: var(--accent);
  border: 2px solid var(--accent);
  margin-left: 8px;
}
.btn-secondary:hover { background: #f0fdf4; }
.spinner {
  display: inline-block;
  width: 14px; height: 14px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  vertical-align: -2px;
  margin-right: 6px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---- tutorial page ---- */
.steps-col { grid-template-columns: 1fr; margin-bottom: 40px; }
.steps-col .step { max-width: 100%; }
.lede-dark { font-size: 1.1rem; color: var(--muted); margin-bottom: 32px; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }