.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.iyaku-modal {
  background: var(--surface-color);
  padding: 24px;
  border-radius: 16px;
  width: 90%;
  max-width: 400px;
  border: 1px solid var(--border-color);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
  position: relative;
  transform: translateY(20px);
  transition: transform 0.2s ease;
}

.modal-overlay.open .iyaku-modal {
  transform: translateY(0);
}

.iyaku-modal .close-btn {
  position: absolute;
  top: 16px;
  right: 16px;
  background: transparent !important;
  border: none !important;
  color: var(--text-muted);
  font-size: 1.2rem;
  cursor: pointer;
  transition: color 0.2s ease;
  width: auto !important;
  padding: 0 !important;
  line-height: 1 !important;
}

.iyaku-modal .close-btn:hover {
  color: var(--text-color);
  background: transparent !important;
}

.auth-input {
  width: 100%;
  padding: 12px 14px;
  margin-bottom: 12px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-color);
  color: var(--text-color);
  font-size: 0.95rem;
  outline: none;
  box-sizing: border-box;
}

.auth-btn {
  width: 100%;
  padding: 14px 16px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.2s ease;
}