.container{min-height:100vh;display:flex;align-items:center;justify-content:center}.card{background:#fff;border-radius:12px;box-shadow:0 4px 24px #0000001a;padding:48px 40px;display:flex;flex-direction:column;align-items:center;gap:24px;width:100%;max-width:380px}h1{font-size:1.75rem;font-weight:700;color:#1a1a2e}.msg{font-size:.9rem;padding:10px 16px;border-radius:8px;width:100%;text-align:center}.msg.success{background:#d1fae5;color:#065f46}.msg.error{background:#fee2e2;color:#991b1b}.oauth-btn{display:flex;align-items:center;gap:12px;padding:12px 24px;border:1.5px solid #dadce0;border-radius:8px;background:#fff;color:#3c4043;font-size:.95rem;font-weight:500;text-decoration:none;cursor:pointer;transition:background .15s,box-shadow .15s;width:100%;justify-content:center}.oauth-btn:hover{background:#f8f9fa;box-shadow:0 2px 8px #0000001f}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:#f0f2f5;min-height:100vh}