:root {
  --clr-pure-bg: #000000;
  --clr-card-bg: #181b26;
  --clr-surface-mid: #30354b;
  --clr-border-muted: #3a405a;
  --clr-text-muted: #6b89a6;
  --clr-accent: #9cd2f1;
  --clr-light-ghost: #f6f5fa;
  --clr-pure-white: #ffffff;
}

body {
  background-color: var(--clr-pure-bg);
  color: var(--clr-light-ghost);
}

/* Card Theme Override */
.card-custom {
  background-color: var(--clr-card-bg);
  border: 1px solid var(--clr-border-muted);
}

/* Text & Colors */
.text-accent {
  color: var(--clr-accent);
  letter-spacing: -0.025em;
}

.text-custom-muted {
  color: var(--clr-text-muted);
}

/* Interactive Buttons */
.btn-accent {
  background-color: var(--clr-accent);
  color: var(--clr-pure-bg);
  border: 1px solid var(--clr-accent);
  font-weight: 600;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-accent:hover {
  background-color: transparent;
  color: var(--clr-accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(156, 210, 241, 0.25);
}

.btn-outline-custom {
  background-color: var(--clr-surface-mid);
  color: var(--clr-light-ghost);
  border: 1px solid var(--clr-border-muted);
  font-weight: 500;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-outline-custom:hover {
  background-color: var(--clr-border-muted);
  color: var(--clr-pure-white);
  border-color: var(--clr-text-muted);
  transform: translateY(-2px);
}

/* Dark Theme Form Controls */
.form-control-custom {
  background-color: var(--clr-surface-mid);
  border: 1px solid var(--clr-border-muted);
  color: var(--clr-light-ghost);
}

.form-control-custom:focus {
  background-color: var(--clr-surface-mid);
  border-color: var(--clr-accent);
  color: var(--clr-pure-white);
  box-shadow: 0 0 0 0.25rem rgba(156, 210, 241, 0.25);
}

/* Responsive Split Border for Login/Register Columns */
.split-border {
  border-bottom: 1px solid var(--clr-border-muted);
}

@media (min-width: 768px) {
  .split-border {
    border-bottom: none;
    border-right: 1px solid var(--clr-border-muted);
  }
}

.auth-panel {
  transition: opacity 0.25s ease, filter 0.25s ease;
}

.auth-panel.is-blocked {
  opacity: 0.4;
  filter: blur(1px);
  pointer-events: none;
}

/* Alert styling for auth errors */
.auth-alert {
  background-color: rgba(156, 210, 241, 0.12);
  border: 1px solid var(--clr-accent);
  color: var(--clr-light-ghost);
}