.auth-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-10) var(--space-6);
    position: relative;
    overflow: hidden;
  }

  /* ═══ Animated Background ═══ */
  .auth-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 0;
  }

  .auth-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.35;
    animation: authOrbFloat 18s ease-in-out infinite;
  }

  .auth-orb-1 {
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    top: -180px;
    right: -120px;
  }

  .auth-orb-2 {
    width: 350px;
    height: 350px;
    background: linear-gradient(135deg, #3b82f6, #6366f1);
    bottom: -100px;
    left: -80px;
    animation-delay: -8s;
  }

  .auth-orb-3 {
    width: 250px;
    height: 250px;
    background: linear-gradient(135deg, #ec4899, #f43f5e);
    top: 40%;
    left: 60%;
    animation-delay: -4s;
    opacity: 0.15;
  }

  @keyframes authOrbFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -25px) scale(1.06); }
    66% { transform: translate(-15px, 15px) scale(0.94); }
  }

  .auth-grid-lines {
    position: absolute;
    inset: 0;
    background-image:
      linear-gradient(rgba(99, 102, 241, 0.04) 1px, transparent 1px),
      linear-gradient(90deg, rgba(99, 102, 241, 0.04) 1px, transparent 1px);
    background-size: 50px 50px;
    mask-image: radial-gradient(ellipse at center, black 0%, transparent 75%);
  }

  /* ═══ Container & Card ═══ */
  .auth-container {
    width: 100%;
    max-width: 440px;
    position: relative;
    z-index: 1;
  }

  .auth-card {
    padding: var(--space-10);
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(24px) saturate(1.5);
    -webkit-backdrop-filter: blur(24px) saturate(1.5);
    border: 1px solid rgba(255, 255, 255, 0.6);
    border-radius: var(--radius-2xl);
    margin-bottom: var(--space-6);
    box-shadow:
      0 8px 32px rgba(0, 0, 0, 0.06),
      0 2px 8px rgba(0, 0, 0, 0.04),
      inset 0 1px 0 rgba(255, 255, 255, 0.8);
    animation: cardEntrance 0.6s cubic-bezier(0.16, 1, 0.3, 1) both;
  }

  html:not(.light-mode) .auth-card {
    background: rgba(15, 15, 25, 0.72);
    border-color: rgba(255, 255, 255, 0.08);
    box-shadow:
      0 8px 32px rgba(0, 0, 0, 0.3),
      0 2px 8px rgba(0, 0, 0, 0.2),
      inset 0 1px 0 rgba(255, 255, 255, 0.05);
  }

  @keyframes cardEntrance {
    from { opacity: 0; transform: translateY(24px) scale(0.97); }
    to { opacity: 1; transform: translateY(0) scale(1); }
  }

  /* ═══ Logo ═══ */
  .auth-logo { display: flex; align-items: center; justify-content: center; gap: var(--space-3); margin-bottom: var(--space-8); text-decoration: none; }
  .logo-mark { width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; }
  .logo-mark svg { width: 32px; height: 36px; }
  .logo-text { display: flex; flex-direction: column; line-height: 1; gap: 1px; }
  .logo-traffic { font-size: 0.8rem; font-weight: 600; color: var(--text-primary); letter-spacing: 0.14em; text-transform: uppercase; }
  .logo-orchestrator { font-size: 0.8rem; font-weight: 500; background: linear-gradient(135deg, #6366f1, #8b5cf6); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; letter-spacing: 0.02em; }

  /* ═══ Title ═══ */
  .auth-title { font-size: var(--text-2xl); font-weight: var(--font-bold); text-align: center; margin-bottom: var(--space-2); color: var(--text-primary); }
  .auth-subtitle { text-align: center; color: var(--text-tertiary); margin-bottom: var(--space-8); font-size: var(--text-sm); line-height: var(--leading-relaxed); }

  /* ═══ Form ═══ */
  .form-group { margin-bottom: var(--space-5); }
  .form-group label { display: block; font-size: var(--text-sm); font-weight: var(--font-medium); color: var(--text-primary); margin-bottom: var(--space-2); }

  .form-group input {
    width: 100%; padding: var(--space-3) var(--space-4);
    background: rgba(255, 255, 255, 0.6); border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: var(--radius-lg); font-size: var(--text-base); color: var(--text-primary);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1); backdrop-filter: blur(8px);
  }

  html:not(.light-mode) .form-group input {
    background: rgba(255, 255, 255, 0.05); border-color: rgba(255, 255, 255, 0.1);
  }

  .form-group input:focus { outline: none; border-color: var(--brand-primary); box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.12), 0 1px 3px rgba(0, 0, 0, 0.06); transform: translateY(-1px); }
  .form-group input::placeholder { color: var(--text-quaternary); }
  .password-wrapper input { padding-right: var(--space-10) !important; }

  /* ═══ Footer ═══ */
  .auth-footer { text-align: center; font-size: var(--text-sm); color: var(--text-tertiary); margin-top: var(--space-6); }
  .auth-footer a { color: var(--brand-primary); text-decoration: none; font-weight: var(--font-medium); }
  .auth-footer a:hover { text-decoration: underline; }

  /* ═══ Success ═══ */
  .success-message { text-align: center; }
  .success-icon { width: 72px; height: 72px; margin: 0 auto var(--space-5); background: rgba(34, 197, 94, 0.15); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: var(--success); }
  .success-message h2 { font-size: var(--text-xl); font-weight: var(--font-semibold); margin-bottom: var(--space-3); color: var(--text-primary); }
  .success-message p { color: var(--text-secondary); font-size: var(--text-sm); margin-bottom: var(--space-3); }
  .help-text { color: var(--text-tertiary) !important; }
  .help-text a { color: var(--brand-primary); text-decoration: none; }

  /* ═══ Security Note ═══ */
  .security-note { display: flex; align-items: center; justify-content: center; gap: var(--space-2); font-size: var(--text-xs); color: var(--text-tertiary); }
  .security-note svg { color: var(--text-quaternary); }

  /* ═══ Error States ═══ */
  .form-error-banner { padding: var(--space-3) var(--space-4); background: var(--error-muted); border: 1px solid rgba(239, 68, 68, 0.3); border-radius: var(--radius-lg); color: var(--error); font-size: var(--text-sm); margin-bottom: var(--space-5); display: flex; align-items: center; gap: var(--space-2); }
  .form-error-banner::before { content: '⚠'; }
  .form-group input.input-error { border-color: var(--error); }
  .form-group input.input-error:focus { box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1); }
  .field-error { margin-top: var(--space-2); font-size: var(--text-sm); color: var(--error); }
  .label-required::after { content: ' *'; color: var(--error); }

  /* ═══ Button Loading ═══ */
  .btn .btn-spinner { width: 16px; height: 16px; border: 2px solid rgba(255, 255, 255, 0.3); border-top-color: white; border-radius: 50%; animation: spin 0.8s linear infinite; display: inline-block; }
  @keyframes spin { to { transform: rotate(360deg); } }

  /* ═══ Reduced Motion ═══ */
  @media (prefers-reduced-motion: reduce) {
    .auth-orb { animation: none; }
    .auth-card { animation: none; }
  }