/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.btn:active {
  transform: scale(0.98);
}

.btn--primary {
  background: var(--color-primary);
  color: var(--text-inverse);
  width: 100%;
}

.btn--primary:hover {
  background: var(--color-primary-hover);
}

.btn--ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  font-weight: 600;
}

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

.btn--danger {
  background: var(--color-danger);
  color: var(--text-inverse);
  width: 100%;
  font-size: 0.8125rem;
}

.btn--danger:hover {
  background: var(--color-danger-hover);
}

.btn--icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 50%;
  background: var(--bg-hover);
  color: var(--text-secondary);
  flex-shrink: 0;
}

.btn--icon:hover {
  background: var(--border-color);
}

.btn--icon svg {
  width: 20px;
  height: 20px;
}

/* İkon + etiket (Profilim tarzı) - .btn--icon (yalnız ikon) ile karıştırma */
.btn__icon {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
}

.btn__icon--whatsapp {
  stroke: none;
  fill: currentColor;
}

.btn--soft {
  font-weight: 600;
}

.btn-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.btn-grid > .btn {
  width: 100%;
  min-height: 46px;
}

.btn--primary.btn--narrow,
.btn--danger.btn--narrow {
  width: auto;
  min-width: 140px;
}

.btn--primary:disabled,
.btn--primary[disabled],
.btn--ghost:disabled,
.btn--ghost[disabled] {
  opacity: 0.55;
  cursor: not-allowed;
  pointer-events: none;
}

.btn.is-busy {
  position: relative;
  overflow: hidden;
  pointer-events: none;
  opacity: 0.92;
  cursor: wait;
}

/* Kayıt sırasında alt kenarda kayan ışık şeridi */
.btn.is-busy::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.9), transparent);
  background-size: 45% 100%;
  background-repeat: no-repeat;
  animation: sgp-btn-shimmer 1.1s ease-in-out infinite;
}

.btn__spinner {
  display: inline-block;
  width: 1em;
  height: 1em;
  margin-right: 0.45em;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-top-color: rgba(255, 255, 255, 0.45);
  border-radius: 50%;
  vertical-align: -0.15em;
  animation: sgp-btn-spin 0.7s linear infinite;
}

/* Başarı — yeşile yumuşak geçiş + ölçeklenerek beliren tik */
.btn.is-success {
  pointer-events: none;
  background: var(--color-success, #16a34a);
  border-color: var(--color-success, #16a34a);
  color: #fff;
  transition: background 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}

.btn__success-icon {
  width: 1em;
  height: 1em;
  margin-right: 0.45em;
  vertical-align: -0.15em;
  animation: sgp-btn-check 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes sgp-btn-spin {
  to { transform: rotate(360deg); }
}

@keyframes sgp-btn-shimmer {
  0% { background-position: -45% 0; }
  100% { background-position: 145% 0; }
}

@keyframes sgp-btn-check {
  from { transform: scale(0.4); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .btn.is-busy::after { animation: none; content: none; }
  .btn__spinner { animation-duration: 1.6s; }
  .btn__success-icon { animation: none; }
}

/* Form inputs */
.form-group {
  margin-bottom: 16px;
}

.form-input {
  width: 100%;
  padding: 14px 16px;
  font-size: 0.9375rem;
  background: var(--bg-input);
  border: 1px solid var(--border-input);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  transition: border-color var(--transition-fast);
}

.form-input::placeholder {
  color: var(--text-muted);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.form-input:read-only {
  background: var(--bg-hover);
  cursor: default;
}

.form-input-wrap {
  position: relative;
}

.form-input-wrap .form-input {
  padding-right: 48px;
}

.form-input-toggle {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
}

.form-input-toggle:hover {
  color: var(--text-secondary);
  background: var(--bg-hover);
}

.form-input-toggle svg {
  display: block;
  width: 20px;
  height: 20px;
  pointer-events: none;
}

.form-link {
  display: block;
  width: 100%;
  text-align: center;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin: 16px 0 24px;
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
}

.form-link:hover {
  color: var(--text-primary);
}

.form-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
  letter-spacing: 0.02em;
}