:root {
  --green-dark:   #006633;   /* header, nav, buttons */
  --green-mid:    #0f9146;   /* buttons hover, section labels */
  --gray-bg:      #e0e0e0;   /* gray page background */
  --orange:       #D4621A;   /* CTA accent — verify against your site */
  --text-dark:    #1a1a1a;
  --text-muted:   #666;
  --border:       #ddd;
  --radius:       8px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
  background: #e0e0e0;
  color: var(--text-dark);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Header ────────────────────────────────────── */
.site-header {
  background: var(--green-dark);
  padding: 16px 32px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}
.logo { height: 48px; }

/* ── Main layout ────────────────────────────────── */
.payment-container {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 40px 16px;
}

.card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: 0 4px 24px rgba(0,0,0,0.08);
  padding: 40px;
  width: 100%;
  max-width: 520px;
}

.card h1 {
  font-size: 26px;
  color: var(--green-dark);
  margin-bottom: 6px;
}
.subtitle { color: var(--text-muted); margin-bottom: 28px; font-size: 15px; }

/* ── Form fields ────────────────────────────────── */
.field-group { margin-bottom: 18px; }
.field-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.field-group input {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-size: 15px;
  transition: border-color 0.2s;
}
.field-group input:focus {
  outline: none;
  border-color: var(--green-mid);
  box-shadow: 0 0 0 3px rgba(45,106,79,0.12);
}
.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
}

/* ── Divider + section label ─────────────────────── */
.divider { border-top: 1px solid var(--border); margin: 24px 0 20px; }
.section-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--green-dark);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

/* ── Button ─────────────────────────────────────── */
#pay-btn {
  width: 100%;
  padding: 16px;
  background: var(--green-dark);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 17px;
  font-weight: 700;
  cursor: pointer;
  margin-top: 24px;
  transition: background 0.2s, transform 0.1s;
  letter-spacing: 0.02em;
}
#pay-btn:hover  { background: var(--green-mid); }
#pay-btn:active { transform: scale(0.98); }
#pay-btn:disabled { background: #999; cursor: not-allowed; }

/* ── Error banner ───────────────────────────────── */
.error-banner {
  background: #FFF3F3;
  border: 1.5px solid #E53E3E;
  border-radius: var(--radius);
  color: #C53030;
  padding: 12px 16px;
  margin-bottom: 20px;
  font-size: 14px;
  font-weight: 500;
}
.hidden { display: none; }

/* ── Secure note ────────────────────────────────── */
.secure-note {
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 12px;
}

/* ── Footer ─────────────────────────────────────── */
.site-footer {
  background: var(--green-dark);
  color: rgba(255,255,255,0.7);
  text-align: center;
  padding: 16px;
  font-size: 13px;
}
.site-footer a { color: rgba(255,255,255,0.9); }

/* ── Responsive ─────────────────────────────────── */
@media (max-width: 520px) {
  .card { padding: 24px 16px; }
  .field-row { grid-template-columns: 1fr 1fr; }
  .field-row .field-group:last-child { grid-column: span 2; }
}

/* Placeholder text */
input::placeholder {
  color: #aaa;
  opacity: 1;
}

input {
  color: #1a1a1a;
}