body {
  font-family: "Inter", sans-serif;
  background: #f3f5f9;
  color: #021633;
  margin: 0;
}

.container {
  max-width: 900px;
  margin: auto;
  padding: 20px;
}

.page-header {
  background: #021633;
  color: white;
  padding: 18px 0;
}

.back-btn {
  color: white;
  text-decoration: none;
  margin-right: 15px;
}

.subtitle {
  color: #666;
  margin-bottom: 30px;
}

/* FORM CARD */

.bill-form-card {
  background: white;
  padding: 30px;
  border-radius: 16px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
  margin-bottom: 40px;
}

.bill-form-card form {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.bill-form-card input,
.bill-form-card select {
  padding: 12px;
  border-radius: 8px;
  border: 1px solid #ddd;
}

.pay-btn {
  background: #4b38f5;
  color: white;
  border: none;
  padding: 14px;
  border-radius: 25px;
  font-weight: 600;
  cursor: pointer;
}

.pay-btn:hover {
  background: #3726cc;
}

/* SAVED BILLERS */

.saved-billers {
  margin-bottom: 40px;
}

.biller-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.biller-card {
  background: white;
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.08);
  cursor: pointer;
  transition: 0.3s;
}

.biller-card:hover {
  transform: translateY(-4px);
}

/* HISTORY */

.recent-payments {
  background: white;
  padding: 25px;
  border-radius: 15px;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.08);
}

.no-history {
  color: #777;
}

/* MODAL */

.confirm-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: none;
  justify-content: center;
  align-items: center;
}

.confirm-box {
  background: white;
  padding: 30px;
  border-radius: 15px;
  width: 90%;
  max-width: 400px;
  text-align: center;
}

.confirm-btn {
  background: #28a745;
  color: white;
  border: none;
  padding: 12px 22px;
  border-radius: 20px;
  cursor: pointer;
}

.cancel-btn {
  background: #ddd;
  border: none;
  padding: 12px 22px;
  border-radius: 20px;
  margin-left: 10px;
}

/* ── Mobile ── */
@media (max-width: 768px) {
  .paybill-hero {
    padding: 36px 16px !important;
  }
  .biller-grid {
    grid-template-columns: 1fr 1fr !important;
    gap: 12px !important;
  }
  .biller-card {
    padding: 16px 12px !important;
  }
  .bill-form {
    padding: 24px 18px !important;
  }
  .form-group input,
  .form-group select {
    font-size: 16px !important;
  }
  .payment-summary {
    padding: 18px !important;
  }
}