/* Hero Section */
.hero {
  text-align: center;
  width: 100%;
  margin-left: auto;
  margin-right: auto;
}

.hero h1 {
  font-size: 2.75rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.card h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
}

.card p {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-lg);
  line-height: 1.6;
}

/* Amount Buttons */
.amount-buttons {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0.625rem;
  margin-bottom: var(--spacing-lg);
}

.amount-buttons input[type="radio"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.btn-amount {
  background-color: var(--color-white);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  padding: 0.875rem 0.5rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 6px;
  transition:
    border-color 0.15s ease,
    background-color 0.15s ease;
  cursor: pointer;
  text-align: center;
  display: block;
}

.btn-amount:hover {
  border-color: var(--color-text-light);
  background-color: var(--color-background);
}

input[type="radio"]:checked + .btn-amount {
  border-color: var(--color-primary);
  background-color: var(--color-primary);
  color: var(--color-white);
}

input[type="radio"]:focus + .btn-amount {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Custom Amount Input */
.custom-amount {
  margin-bottom: var(--spacing-lg);
}

.custom-amount label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--spacing-xs);
}

.input-group {
  position: relative;
  display: flex;
  align-items: center;
}

.input-prefix {
  position: absolute;
  left: 1rem;
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--color-text-light);
  pointer-events: none;
}

.custom-amount input {
  width: 100%;
  padding: 0.875rem 1rem 0.875rem 2rem;
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background-color: var(--color-white);
  transition:
    border-color 0.15s ease,
    box-shadow 0.15s ease;
  color: var(--color-text);
}

.custom-amount input:hover:not(:read-only) {
  border-color: var(--color-text-light);
}

.custom-amount input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(204, 51, 51, 0.1);
}

.custom-amount input::placeholder {
  color: var(--color-text-light);
  opacity: 0.5;
}

.custom-amount input:read-only {
  background-color: var(--color-background);
  cursor: text;
  opacity: 0.6;
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.25rem;
  }

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