:root{
    --bg:#FAFAF8; --surface:#FFFFFF; --ink:#10131A; --muted:#6B7280;
    --accent:#FF5533; --accent-soft:#FFEDE8; --line:#E7E5E0;
    --danger:#D9463A; --danger-soft:#FDEDEB; --ok:#1a7f4f; --ok-soft:#E7F7EE;
  }
  *{box-sizing:border-box;margin:0;padding:0}
  body{background:var(--bg);color:var(--ink);font-family:'Inter',system-ui,sans-serif;min-height:100vh;display:flex;flex-direction:column}
  h1,.brand{font-family:'Space Grotesk',system-ui,sans-serif}
  a{color:inherit;text-decoration:none}
  :focus-visible{outline:2px solid var(--accent);outline-offset:3px}

  header{padding:20px 24px}
  .brand{display:flex;align-items:center;gap:8px;font-weight:700;font-size:1.1rem;width:fit-content}
  .brand-mark{width:28px;height:28px;border-radius:8px;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:0.9rem}

  main{flex:1;display:flex;align-items:center;justify-content:center;padding:20px}
  .card{width:100%;max-width:400px;background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:32px 28px;box-shadow:0 24px 60px -30px rgba(16,19,26,0.2)}
  .card h1{font-size:1.5rem;margin-bottom:6px}
  .card .sub{color:var(--muted);font-size:0.92rem;margin-bottom:24px}

  .btn{width:100%;display:flex;align-items:center;justify-content:center;gap:10px;padding:12px 16px;border-radius:12px;font-size:0.92rem;font-weight:600;border:1px solid var(--line);cursor:pointer;transition:transform .15s ease,background .15s ease;background:var(--surface);color:var(--ink)}
  .btn:active{transform:scale(0.98)}
  .btn:hover{background:var(--bg)}
  .btn-primary{background:var(--ink);color:#fff;border-color:var(--ink)}
  .btn-primary:hover{background:#000}
  .btn-primary:disabled{opacity:0.55;cursor:not-allowed}

  .divider{display:flex;align-items:center;gap:12px;margin:20px 0;color:var(--muted);font-size:0.8rem}
  .divider::before,.divider::after{content:"";flex:1;height:1px;background:var(--line)}

  .field{margin-bottom:14px}
  .field label{display:block;font-size:0.82rem;font-weight:600;margin-bottom:6px;color:var(--ink)}
  .field input{width:100%;padding:11px 14px;border-radius:10px;border:1px solid var(--line);font-size:0.92rem;font-family:inherit;background:var(--bg);color:var(--ink)}
  .field input:focus{outline:none;border-color:var(--accent);background:var(--surface)}
  .field .hint{font-size:0.76rem;color:var(--muted);margin-top:5px}

  .submit-row{margin-top:20px}
  .alert{display:none;font-size:0.84rem;padding:10px 14px;border-radius:10px;margin-bottom:16px}
  .alert.error{display:block;background:var(--danger-soft);color:var(--danger)}
  .alert.ok{display:block;background:var(--ok-soft);color:var(--ok)}

  .foot-note{text-align:center;font-size:0.84rem;color:var(--muted);margin-top:20px}
  .foot-note a{color:var(--accent);font-weight:600}
  .g-icon{width:18px;height:18px;flex-shrink:0}

  @media(max-width:420px){
    .card{padding:26px 20px;border-radius:16px}
  }