.nb-popup-overlay {
  position: fixed;
  inset: 0;
  z-index: 100000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(10, 10, 10, 0.55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s var(--ease-out), visibility 0.35s var(--ease-out);
}

.nb-popup-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

.nb-popup {
  position: relative;
  width: 100%;
  max-width: 460px;
  padding: 32px 28px 26px;
  background: var(--card-bg);
  border: var(--nb-border-w) solid var(--nb-border);
  border-radius: var(--nb-radius);
  box-shadow: 12px 12px 0 var(--nb-shadow);
  transform: translateY(24px) rotate(-1deg);
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.nb-popup-overlay.is-open .nb-popup {
  transform: translateY(0) rotate(0);
}

.nb-popup-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  border: 2px solid var(--nb-border);
  border-radius: var(--nb-radius);
  box-shadow: 2px 2px 0 var(--nb-shadow);
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.nb-popup-close:hover {
  background: var(--accent);
  color: var(--accent-ink);
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0 var(--nb-shadow);
}

.nb-popup-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 12px;
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: lowercase;
  color: var(--accent-ink);
  background: var(--accent);
  border: 2px solid var(--nb-border);
  border-radius: 2px;
  box-shadow: 3px 3px 0 var(--nb-shadow);
  transform: rotate(-1deg);
}

.nb-popup-title {
  font-size: clamp(1.5rem, 5vw, 2rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}

.nb-popup-title .muted {
  color: var(--text-muted);
  font-weight: 400;
}

.nb-popup-desc {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 22px;
}

.nb-popup-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.nb-popup-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.nb-popup-field label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--accent-ink);
  background: var(--accent);
  border: 1.5px solid var(--nb-border);
  padding: 3px 9px;
  border-radius: 2px;
  letter-spacing: 0.05em;
  width: fit-content;
  box-shadow: 2px 2px 0 var(--nb-shadow);
  transform: rotate(-1deg);
}

.nb-popup-field input {
  width: 100%;
  padding: 13px 15px;
  background: var(--bg-secondary);
  border: 2px solid var(--nb-border);
  border-radius: var(--nb-radius);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.nb-popup-field input:focus {
  border-color: var(--accent-symbol);
  background: var(--bg-primary);
  box-shadow: 3px 3px 0 var(--nb-shadow);
  outline: none;
  transform: translate(-1px, -1px);
}

.nb-popup-note {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-muted);
  letter-spacing: 0.03em;
  text-align: center;
}

@media (max-width: 480px) {
  .nb-popup { padding: 26px 20px 22px; box-shadow: 8px 8px 0 var(--nb-shadow); }
  .nb-popup-title { font-size: 1.4rem; }
}
.nb-popup-success {
  display: none;
  text-align: center;
  padding: 8px 4px 4px;
  animation: nbSuccessIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.nb-popup-success.is-visible {
  display: block;
}

@keyframes nbSuccessIn {
  from { opacity: 0; transform: translateY(12px) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.nb-popup-success-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 700;
  color: var(--accent-ink);
  background: var(--accent);
  border: 3px solid var(--nb-border);
  border-radius: 50%;
  box-shadow: 5px 5px 0 var(--nb-shadow);
  transform: rotate(-4deg);
}

.nb-popup-success-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 10px;
  color: var(--text-primary);
  text-transform: uppercase;
}

.nb-popup-success-msg {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  max-width: 340px;
  margin: 0 auto;
}

.nb-popup-success-msg strong,
.nb-popup-success-msg em {
  color: var(--text-primary);
  font-weight: 600;
  font-style: normal;
}