/* Auth Modal Styles */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--clr-bg-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  padding: var(--space-4);
  backdrop-filter: blur(6px);
  animation: fade-in 200ms ease;
}

.modal-overlay.hidden { display: none; }

.modal-box {
  background: hsl(250, 20%, 10%);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  width: 100%;
  max-width: 440px;
  position: relative;
  animation: slide-up 250ms ease;
  box-shadow: 0 0 60px hsl(160,100%,50%,0.08), 0 0 120px hsl(280,80%,55%,0.06);
}

.modal-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  background: transparent;
  border: 1px solid var(--clr-border);
  color: var(--clr-text-muted);
  width: 32px; height: 32px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}
.modal-close:hover { border-color: var(--clr-neon-pink); color: var(--clr-neon-pink); }

.modal-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 800;
  color: var(--clr-neon-green);
  text-shadow: var(--glow-green);
  margin-bottom: var(--space-6);
}

/* Tabs */
.auth-tabs {
  display: flex;
  gap: 0;
  margin-bottom: var(--space-6);
  border-bottom: 1px solid var(--clr-border);
}

.auth-tab {
  flex: 1;
  padding: var(--space-3);
  font-family: var(--font-display);
  font-size: 0.6rem;
  font-weight: 700;
  text-align: center;
  color: var(--clr-text-muted);
  cursor: pointer;
  border: none;
  border-bottom: 2px solid transparent;
  background: transparent;
  transition: all var(--transition-fast);
  margin-bottom: -1px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.auth-tab.active {
  color: var(--clr-neon-green);
  border-bottom-color: var(--clr-neon-green);
}

.auth-tab:hover:not(.active) { color: var(--clr-text-primary); }

.auth-form { display: none; flex-direction: column; }
.auth-form.active { display: flex; }

.auth-error {
  color: var(--clr-neon-pink);
  font-family: var(--font-body);
  font-size: 0.8rem;
  padding: var(--space-2) var(--space-3);
  background: rgba(255, 0, 204, 0.08);
  border: 1px solid var(--clr-neon-pink);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-4);
  display: none;
}
.auth-error.visible { display: block; }

.auth-footer {
  text-align: center;
  margin-top: var(--space-4);
  font-size: 0.8rem;
  color: var(--clr-text-muted);
}

.auth-footer a {
  color: var(--clr-neon-cyan);
  cursor: pointer;
}