.auth{min-height:100vh;display:grid;grid-template-columns:1fr 1fr}
  /* left — form */
  .au-left{display:flex;flex-direction:column;padding:28px 40px}
  .au-bar{display:flex;align-items:center}
  .au-bar .p-logo .wm{color:var(--tx-1)}
  .au-bar .sp{flex:1}
  .au-form-wrap{flex:1;display:flex;flex-direction:column;justify-content:center;align-items:center;padding:20px 0}
  .au-form{width:100%;max-width:360px}
  .au-tabs{display:flex;gap:3px;background:var(--raise);border:1px solid var(--line-2);border-radius:10px;padding:3px;margin-bottom:26px}
  .au-tabs button{flex:1;border:none;background:transparent;color:var(--tx-2);font-family:var(--font-display);font-size:13px;font-weight:600;padding:9px;border-radius:8px;cursor:pointer;transition:all 140ms}
  .au-tabs button.on{background:var(--surface);color:var(--tx-1);box-shadow:var(--shadow)}
  .au-h{font-family:var(--font-display);font-weight:600;font-size:26px;letter-spacing:-0.025em;margin:0 0 6px}
  .au-sub{font-size:14px;color:var(--tx-2);margin:0 0 24px}
  .au-oauth{display:flex;flex-direction:column;gap:9px;margin-bottom:18px}
  .au-ob{display:flex;align-items:center;justify-content:center;gap:10px;height:44px;border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--tx-1);font-family:var(--font-display);font-size:13.5px;font-weight:600;cursor:pointer;transition:all 140ms}
  .au-ob:hover{border-color:var(--tx-3);background:var(--raise)}
  .au-ob svg{width:17px;height:17px}
  .au-div{display:flex;align-items:center;gap:12px;margin:18px 0;font-family:var(--font-mono);font-size:10px;letter-spacing:0.08em;text-transform:uppercase;color:var(--tx-3)}
  .au-div::before,.au-div::after{content:"";flex:1;height:1px;background:var(--line-2)}
  .au-field{margin-bottom:14px}
  .au-field label{display:block;font-size:12px;font-weight:600;color:var(--tx-2);margin-bottom:6px}
  .au-input{position:relative}
  .au-input input{width:100%;height:44px;border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--tx-1);font-family:var(--font-display);font-size:14px;padding:0 14px;outline:none;transition:all 140ms}
  .au-input input::placeholder{color:var(--tx-3)}
  .au-input input:focus{border-color:var(--tx-3);box-shadow:0 0 0 3px var(--focus)}
  .au-input .eye{position:absolute;right:12px;top:50%;transform:translateY(-50%);background:none;border:none;color:var(--tx-3);cursor:pointer;display:flex}
  .au-input .eye svg{width:16px;height:16px}
  .au-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
  .au-check{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--tx-2);cursor:pointer}
  .au-check .box{width:16px;height:16px;border:1px solid var(--line);border-radius:5px;background:var(--surface);display:flex;align-items:center;justify-content:center}
  .au-check .box svg{width:11px;height:11px;color:var(--inv-tx)}
  .au-check input{display:none}
  .au-check input:checked + .box{background:var(--inv-bg);border-color:var(--inv-bg)}
  .au-link{font-size:12.5px;color:var(--tx-1);text-decoration:none;font-weight:600}
  .au-link:hover{text-decoration:underline;text-underline-offset:3px}
  .au-submit{width:100%;height:46px;border:none;border-radius:10px;background:var(--inv-bg);color:var(--inv-tx);font-family:var(--font-display);font-size:14px;font-weight:600;cursor:pointer;transition:all 150ms;display:flex;align-items:center;justify-content:center;gap:8px}
  .au-submit:hover{opacity:0.9;transform:translateY(-1px)}
  .au-alt{text-align:center;font-size:13px;color:var(--tx-2);margin-top:20px}
  .au-alt a{color:var(--tx-1);font-weight:600;text-decoration:none}
  .au-alt a:hover{text-decoration:underline;text-underline-offset:3px}
  .au-error{font-size:12.5px;color:var(--err);background:color-mix(in srgb,var(--err) 10%,transparent);border:1px solid color-mix(in srgb,var(--err) 30%,transparent);border-radius:9px;padding:10px 12px;margin:0 0 16px}
  .au-fine{font-size:11px;color:var(--tx-3);line-height:1.5;margin-top:24px;text-align:center}
  .au-fine a{color:var(--tx-2);text-decoration:underline;text-underline-offset:2px}
  .au-foot{display:flex;align-items:center;justify-content:space-between;font-family:var(--font-mono);font-size:11px;color:var(--tx-3)}
  .au-foot .st{display:inline-flex;align-items:center;gap:6px}
  .au-foot .st .d{width:6px;height:6px;border-radius:50%;background:var(--ok)}

  /* right — brand panel */
  .au-right{position:relative;overflow:hidden;border-left:1px solid var(--line-2);background:var(--bg-sunken);display:flex;flex-direction:column;justify-content:space-between;padding:48px}
  .au-grid{position:absolute;inset:0;opacity:0.6;pointer-events:none;background-image:linear-gradient(var(--line-2) 1px,transparent 1px),linear-gradient(90deg,var(--line-2) 1px,transparent 1px);background-size:46px 46px;mask-image:radial-gradient(80% 70% at 70% 30%,#000,transparent)}
  .au-glow{position:absolute;width:60%;height:50%;top:-10%;right:-5%;background:radial-gradient(closest-side,var(--surface-2),transparent 75%);filter:blur(40px);pointer-events:none}
  .au-mark{position:relative;width:46px;height:46px;border-radius:13px;border:1px solid var(--line);background:var(--surface);display:flex;align-items:center;justify-content:center}
  .au-mark img{width:26px;height:26px}
  :root[data-theme="dark"] .au-mark img{filter:invert(1) brightness(2)}
  .au-quote{position:relative;max-width:380px}
  .au-quote .q{font-family:var(--font-display);font-weight:500;font-size:26px;line-height:1.3;letter-spacing:-0.02em;color:var(--tx-1)}
  .au-quote .q em{font-family:var(--font-serif);font-style:italic;color:var(--tx-2)}
  .au-quote .by{font-family:var(--font-mono);font-size:12px;color:var(--tx-3);margin-top:18px}
  .au-stats{position:relative;display:flex;gap:30px}
  .au-stat .n{font-family:var(--font-display);font-weight:600;font-size:24px;letter-spacing:-0.02em;font-variant-numeric:tabular-nums}
  .au-stat .l{font-family:var(--font-mono);font-size:10px;letter-spacing:0.06em;text-transform:uppercase;color:var(--tx-3);margin-top:3px}
  @media (max-width:880px){.auth{grid-template-columns:1fr}.au-right{display:none}}

  @media (max-width:520px){
    .au-left{padding:20px}
    .au-top{margin-bottom:34px}
    .au-form{max-width:none}
    .au-tabs{height:42px}
    .au-form h1{font-size:30px}
    .au-oauth{height:44px}
    .au-submit{height:46px}
  }