/* ==========================================================================
   Donation Form Styles — App-like animations
   ========================================================================== */

.donation-form {
  max-width: 600px;
  margin: 0 auto;
}

/* --- Steps with reveal animation --- */
.donation-step {
  margin-bottom: var(--spacing-xl);
}

.donation-step--hidden {
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  margin-bottom: 0;
  transform: translateY(12px);
  transition: opacity 0.4s ease, max-height 0.5s ease, transform 0.4s ease, margin-bottom 0.4s ease;
}

.donation-step--visible {
  opacity: 1;
  max-height: 800px;
  transform: translateY(0);
  margin-bottom: var(--spacing-xl);
  overflow: visible;
}

.donation-step__label {
  font-size: var(--font-size-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--zvk-muted);
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.donation-step__check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background-color: var(--zvk-green);
  color: var(--zvk-white);
  font-size: 0.7rem;
  opacity: 0;
  transform: scale(0);
  transition: opacity 0.3s ease, transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.donation-step__check--show {
  opacity: 1;
  transform: scale(1);
}

/* --- Amount Grid --- */
.amount-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-sm);
}

.amount-btn {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md) var(--spacing-sm);
  min-height: 80px;
  background-color: var(--zvk-white);
  border: 2px solid var(--zvk-border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  font-family: var(--font-family);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--zvk-dark);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  -webkit-tap-highlight-color: transparent;
}

.amount-btn:hover {
  border-color: var(--zvk-green);
  background-color: rgba(33, 79, 49, 0.04);
  transform: translateY(-1px);
}

.amount-btn:active {
  transform: scale(0.97);
}

.amount-btn--selected {
  border-color: var(--zvk-green);
  background-color: var(--zvk-green);
  color: var(--zvk-white);
  box-shadow: 0 4px 20px rgba(33, 79, 49, 0.3);
  transform: translateY(-2px);
}

.amount-btn--selected:hover {
  background-color: var(--zvk-green-light);
  transform: translateY(-2px);
}

/* Badge */
.amount-btn__badge {
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--zvk-green);
  color: var(--zvk-white);
  font-size: 0.625rem;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 10px;
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: background-color 0.25s ease, color 0.25s ease;
}

.amount-btn--selected .amount-btn__badge {
  background-color: var(--zvk-cream);
  color: var(--zvk-green);
}

/* --- Custom amount cell --- */
.amount-btn--custom {
  cursor: default;
  padding: var(--spacing-sm);
  gap: 0.25rem;
}

.amount-btn--custom:hover {
  border-color: var(--zvk-green);
  background-color: rgba(33, 79, 49, 0.04);
}

.amount-btn--custom.amount-btn--selected {
  background-color: var(--zvk-green);
}

.amount-btn__custom-label {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--zvk-muted);
  cursor: pointer;
  transition: color 0.25s ease;
}

.amount-btn--selected .amount-btn__custom-label {
  color: var(--zvk-cream);
}

.amount-btn__custom-field {
  display: flex;
  align-items: center;
  gap: 2px;
}

.amount-btn__custom-euro {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--zvk-dark);
  transition: color 0.25s ease;
}

.amount-btn--selected .amount-btn__custom-euro {
  color: var(--zvk-white);
}

.amount-btn__custom-input {
  width: 72px;
  border: none;
  border-bottom: 2px solid var(--zvk-border);
  background: transparent;
  font-family: var(--font-family);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--zvk-dark);
  text-align: center;
  padding: 0.15rem 0;
  transition: color 0.25s ease, border-color 0.25s ease;
  -moz-appearance: textfield;
}

.amount-btn__custom-input::-webkit-inner-spin-button,
.amount-btn__custom-input::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.amount-btn__custom-input:focus {
  outline: none;
  border-bottom-color: var(--zvk-green);
}

.amount-btn--selected .amount-btn__custom-input {
  color: var(--zvk-white);
  border-bottom-color: rgba(255,255,255,0.5);
}

.amount-btn--selected .amount-btn__custom-input:focus {
  border-bottom-color: var(--zvk-white);
}

.amount-btn__custom-input::placeholder {
  color: var(--zvk-border);
  font-weight: 400;
}

.amount-btn--selected .amount-btn__custom-input::placeholder {
  color: rgba(255,255,255,0.5);
}

/* --- Country dropdown --- */
.country-select-wrap {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.country-select__label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--zvk-muted);
  white-space: nowrap;
}

.country-select {
  flex: 1;
  padding: 0.6rem 1rem;
  border: 2px solid var(--zvk-border);
  border-radius: var(--radius-md);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--zvk-dark);
  background-color: var(--zvk-white);
  cursor: pointer;
  transition: border-color 0.25s ease;
  max-width: 280px;
}

.country-select:focus {
  outline: none;
  border-color: var(--zvk-green);
}

/* --- Payment method buttons (staggered entrance) --- */
.methods-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-sm);
}

.method-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: var(--spacing-md) var(--spacing-xs);
  background-color: var(--zvk-white);
  border: 2px solid var(--zvk-border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  font-family: var(--font-family);
  text-align: center;
  -webkit-tap-highlight-color: transparent;
  /* Entrance animation */
  opacity: 0;
  transform: translateY(16px) scale(0.95);
  animation: methodIn 0.35s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
  /* Hover/select transitions */
  transition: border-color 0.2s ease, background-color 0.2s ease, box-shadow 0.25s ease, transform 0.2s ease;
}

@keyframes methodIn {
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.method-btn:hover {
  border-color: var(--zvk-green);
  background-color: rgba(33, 79, 49, 0.05);
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(33, 79, 49, 0.15);
}

.method-btn:active {
  transform: translateY(0) scale(0.97);
  box-shadow: none;
  transition-duration: 0.1s;
}

.method-btn--selected {
  border-color: var(--zvk-green);
  background-color: var(--zvk-green);
  box-shadow: 0 4px 20px rgba(33, 79, 49, 0.3);
  transform: translateY(-2px);
}

.method-btn--selected:hover {
  background-color: var(--zvk-green-light);
  transform: translateY(-2px);
}

.method-btn__logo {
  height: 36px;
  width: auto;
  max-width: 80px;
  object-fit: contain;
  transition: filter 0.25s ease;
}

.method-btn--selected .method-btn__logo {
  filter: brightness(0) invert(1);
}

.method-btn__name {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--zvk-muted);
  line-height: 1.2;
  transition: color 0.25s ease;
}

.method-btn--selected .method-btn__name {
  color: var(--zvk-white);
  font-weight: 600;
}

/* --- Confirm step (slide up) --- */
.donation-form__submit {
  text-align: center;
}

.donation-form__submit .btn {
  width: 100%;
  padding: 1.1rem 2rem;
  font-size: var(--font-size-lg);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.donation-form__submit .btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
  transform: translateX(-100%);
  transition: none;
}

.donation-form__submit .btn:not(:disabled):hover::after {
  animation: btnShimmer 0.6s ease forwards;
}

@keyframes btnShimmer {
  to { transform: translateX(100%); }
}

.donation-form__note {
  margin-top: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--zvk-muted);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .methods-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 480px) {
  .amount-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .methods-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}