:root {
  --primary: #007bff;
  --bg: #ffffff;
  --light: #f0f0f0;
  --radius: 12px;
  --btn-bg: #007bff;
  --btn-hover: #0056b3;
  --btn-text: #ffffff;
}

.ank-container {
  max-width: 700px;
  margin: 40px auto;
  padding: 20px;
  background: var(--bg);
  border-radius: var(--radius);
  box-shadow: 0 0 12px rgba(0, 0, 0, 0.08);
  font-family: Arial, Helvetica, sans-serif;
}

h2 {
  text-align: center;
  margin-top: 0;
}

.step {
  display: none;
  animation: 0.4s slideIn forwards;
}

.step.active {
  display: block;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.bank-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
  margin-top: 20px;
}

.bank-item {
  cursor: pointer;
  background: var(--light);
  border-radius: var(--radius);
  padding: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: 0.3s;
}

.bank-item img {
  max-width: 100%;
  max-height: 50px;
  transition: 0.3s;
}

.bank-item.dim {
  filter: grayscale(1) opacity(0.7);
}

.install-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 12px;
  margin-top: 20px;
}

.inst-item {
  cursor: pointer;
  background: var(--light);
  border-radius: var(--radius);
  padding: 14px;
  font-weight: bold;
  text-align: center;
  transition: 0.3s;
}

.inst-item.dim {
  opacity: 0.5;
}

.amount-group {
  margin-top: 20px;
}

.amount-group input {
  width: 100%;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: var(--radius);
  font-size: 16px;
}

.mode-group {
  margin: 15px 0;
}

.mode-group label {
  margin-right: 18px;
  cursor: pointer;
}

.btn-row {
  display: flex;
  justify-content: space-between;
  margin-top: 25px;
}

.btn-row button {
  flex: 1;
  margin: 0 6px;
  padding: 12px;
  border: none;
  border-radius: var(--radius);
  background: var(--btn-bg);
  color: var(--btn-text);
  font-size: 16px;
  transition: none;
}

.btn-row button:hover {
  background: var(--btn-bg);
}

.btn-row button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

#result {
  background: var(--light);
  padding: 18px;
  border-radius: var(--radius);
  margin-top: 20px;
  font-weight: bold;
  display: none;
  font-size: 16px;
  line-height: 1.6;
}

/* ==== MOBİL UYUM ==== */
@media (max-width: 600px) {
  .ank-container {
    margin: 20px 8px;
  }

  .bank-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .install-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.payment-links {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  animation: fadein 1s ease-in;
}

.payment-links .pay-link img {
  width: 200px;
  height: auto;
  max-width: 90%;
  border-radius: 8px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.1);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.payment-links .pay-link img:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 18px rgba(0,0,0,0.15);
}

@keyframes fadein {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}