.auth-buttons{display:flex;flex-direction:column;gap:16px;max-width:300px;margin:20px auto;padding:20px}.auth-button{padding:12px 24px;border:none;border-radius:4px;font-size:16px;font-weight:500;cursor:pointer;transition:opacity .2s;color:#fff;width:100%}.auth-button:hover{opacity:.9}.auth-button.facebook{background-color:#1877f2}.auth-button.google{background-color:#4285f4}.auth-button.vk{background-color:#4c75a3}.auth-button.yandex{background-color:#fc3f1d}#app{text-align:center;padding:20px}h1{margin-bottom:30px;color:#333}