/* 공통 앱 모달 (alert 대체) */
.app-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 100000;
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}
.app-modal-overlay.is-open {
  opacity: 1;
  visibility: visible;
}
.app-modal {
  width: 100%;
  max-width: 400px;
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  border-radius: 16px;
  box-shadow: 0 24px 48px rgba(15, 23, 42, 0.2), 0 0 0 1px rgba(148, 163, 184, 0.15);
  padding: 1.5rem 1.5rem 1.25rem;
  transform: scale(0.96) translateY(8px);
  transition: transform 0.22s ease;
}
.app-modal-overlay.is-open .app-modal {
  transform: scale(1) translateY(0);
}
.app-modal__icon {
  width: 52px;
  height: 52px;
  margin: 0 auto 12px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}
.app-modal__icon--success {
  background: linear-gradient(135deg, #dcfce7 0%, #bbf7d0 100%);
  color: #166534;
}
.app-modal__icon--error {
  background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
  color: #b91c1c;
}
.app-modal__icon--info {
  background: linear-gradient(135deg, #e0f2fe 0%, #bae6fd 100%);
  color: #0369a1;
}
.app-modal__title {
  margin: 0 0 8px;
  font-size: 1.2rem;
  font-weight: 800;
  color: #0f172a;
  text-align: center;
  letter-spacing: -0.02em;
}
.app-modal__body {
  margin: 0 0 18px;
  font-size: 0.95rem;
  line-height: 1.55;
  color: #475569;
  text-align: center;
}
.app-modal__actions {
  display: flex;
  justify-content: center;
  gap: 10px;
}
.app-modal__btn {
  min-width: 120px;
  padding: 12px 20px;
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
  background: linear-gradient(135deg, #2d5a45 0%, #4a7c59 100%);
  color: #fff;
  transition: transform 0.15s, box-shadow 0.15s;
}
.app-modal__btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(45, 90, 69, 0.35);
}
.app-modal__btn:active {
  transform: translateY(0);
}

/* 버튼 로딩 스피너 */
.btn-loading-wrap {
  position: relative;
  pointer-events: none;
  opacity: 0.85;
}
.btn-loading-wrap .btn-spinner {
  display: inline-block;
  width: 1.1em;
  height: 1.1em;
  margin-right: 8px;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: app-spin 0.75s linear infinite;
  vertical-align: middle;
}
@keyframes app-spin {
  to {
    transform: rotate(360deg);
  }
}