/* ===============================
   HENTECH BILLING — SYSTEM THEME
   =============================== */

body {
  margin: 0;
  background:
    radial-gradient(circle at 20% 20%, rgba(59,130,246,0.06), transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(250,204,21,0.05), transparent 40%),
    #0e0f11;
  color: #d1d5db;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.billing-header {
  border-bottom: 1px solid #1f2937;
  padding-bottom: 40px;
}

.back-btn {
  display: inline-block;
  margin-top: 30px;
  margin-bottom: 40px;
  padding: 10px 18px;
  background: #1f2937;
  color: #fff;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
}

.billing-hero {
  text-align: center;
}

.billing-hero h1 {
  font-size: 36px;
  margin: 0;
}

.billing-subtitle {
  color: #9ca3af;
  margin-top: 12px;
}

/* Pricing */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 30px;
  margin: 80px 0;
}

.plan-card {
  background: #111827;
  border: 1px solid #1f2937;
  border-radius: 16px;
  padding: 30px;
  transition: 0.3s ease;
}

.plan-card h2 {
  margin-top: 0;
}

.price {
  font-size: 32px;
  font-weight: 700;
  margin: 15px 0;
}

.price span {
  font-size: 14px;
  color: #9ca3af;
}

.plan-card ul {
  padding-left: 20px;
  line-height: 1.8;
  font-size: 14px;
  color: #cbd5e1;
}

.plan-card button {
  width: 100%;
  padding: 14px;
  margin-top: 20px;
  border: none;
  border-radius: 10px;
  font-weight: 700;
  cursor: pointer;
  transition: 0.25s ease;
}

/* Plan Colors */

.standard h2 { color: #9ca3af; }
.standard button {
  background: #9ca3af;
  color: #000;
}

.active h2 { color: #3b82f6; }
.active button {
  background: #2563eb;
  color: #fff;
}

.enterprise h2 { color: #facc15; }
.enterprise button {
  background: #facc15;
  color: #000;
}

/* Hover Glow */
.plan-card:hover {
  transform: translateY(-6px);
}

.standard:hover { box-shadow: 0 0 20px rgba(156,163,175,0.15); }
.active:hover { box-shadow: 0 0 20px rgba(59,130,246,0.2); }
.enterprise:hover { box-shadow: 0 0 25px rgba(250,204,21,0.25); }

.billing-footer {
  text-align: center;
  padding: 40px;
  border-top: 1px solid #1f2937;
  color: #6b7280;
  font-size: 13px;
}