.auth-overlay {
    position: fixed; inset: 0; z-index: 1000;
    background: rgba(0,0,0,0.85); backdrop-filter: blur(8px);
    display: flex; align-items: center; justify-content: center;
    opacity: 0; visibility: hidden; transition: opacity 0.25s, visibility 0.25s;
  }
  .auth-overlay.open { opacity: 1; visibility: visible; }
  .auth-box {
    background: #0a0a0a; border: 1px solid rgba(255,255,255,0.1);
    width: 100%; max-width: 360px; padding: 36px 32px;
    position: relative; animation: fadeUp 0.3s ease both;
  }
  .auth-close {
    position: absolute; top: 14px; right: 14px;
    background: none; border: none; color: #555; cursor: pointer;
    line-height: 1; padding: 4px; transition: color 0.15s;
  }
  .auth-close:hover { color: #fff; }
  .auth-logo {
    font-family: var(--font-display); font-weight: 800; font-size: 20px;
    letter-spacing: -0.02em; color: var(--white); margin-bottom: 6px;
  }
  .auth-sub {
    font-family: var(--font-mono); font-size: 11px; color: #555;
    letter-spacing: 0.06em; margin-bottom: 28px;
  }
  .auth-google-btn {
    width: 100%; display: flex; align-items: center; justify-content: center; gap: 10px;
    background: var(--white); color: var(--black);
    border: none; padding: 13px 20px; cursor: pointer;
    font-family: var(--font-display); font-size: 13px; font-weight: 700;
    letter-spacing: 0.02em; text-transform: uppercase;
    transition: background 0.2s, transform 0.15s; margin-bottom: 16px;
  }
  .auth-google-btn:hover { background: #e8e8e8; transform: translateY(-1px); }
  .auth-google-btn:active { transform: translateY(0); }
  .auth-divider {
    display: flex; align-items: center; gap: 10px;
    font-family: var(--font-mono); font-size: 9px; color: #333;
    letter-spacing: 0.1em; margin-bottom: 16px;
  }
  .auth-divider::before, .auth-divider::after { content: ''; flex: 1; height: 1px; background: rgba(255,255,255,0.07); }
  .auth-field-label {
    font-family: var(--font-mono); font-size: 10px; color: #555;
    letter-spacing: 0.08em; text-transform: uppercase;
    display: block; margin-bottom: 6px;
  }
  .auth-input {
    width: 100%; background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08); color: var(--white);
    padding: 10px 12px; font-family: var(--font-mono); font-size: 12px;
    outline: none; transition: border-color 0.2s; margin-bottom: 10px;
  }
  .auth-input:focus { border-color: rgba(255,255,255,0.25); }
  .auth-input::placeholder { color: #333; }
  .auth-email-btn {
    width: 100%; background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1); color: var(--white);
    padding: 11px 20px; cursor: pointer;
    font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.06em;
    transition: background 0.2s, border-color 0.2s; margin-bottom: 8px;
  }
  .auth-email-btn:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.2); }
  .auth-toggle {
    font-family: var(--font-mono); font-size: 10px; color: #444;
    text-align: center; letter-spacing: 0.04em; cursor: pointer;
    transition: color 0.2s;
  }
  .auth-toggle span { color: #777; text-decoration: underline; cursor: pointer; }
  .auth-toggle span:hover { color: #fff; }
  .auth-err {
    font-family: var(--font-mono); font-size: 10px; color: #ef4444;
    letter-spacing: 0.04em; margin-top: 8px; min-height: 14px;
  }
  .auth-loading {
    font-family: var(--font-mono); font-size: 11px; color: #555;
    text-align: center; letter-spacing: 0.08em; padding: 8px 0;
  }