@keyframes slideIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.animate-slide-in{animation:slideIn .6s ease-out}.back-button:hover{background:rgba(255,255,255,.1);transform:translateY(-1px)}.social-button:hover{background:rgba(255,255,255,.05);transform:translateY(-1px)}.login-button:hover{background:#ffb300;transform:translateY(-2px);box-shadow:0 4px 15px rgba(255,193,7,.4)}.login-button:disabled{opacity:.7;cursor:not-allowed;transform:none}.form-input:focus{border-color:#ffc107;box-shadow:0 0 0 2px rgba(255,193,7,.2)}.form-input.error{border-color:#ef4444;box-shadow:0 0 0 2px rgba(239,68,68,.2)}.forgot-password:hover,.remember-me:hover .checkbox-text,.signup-link:hover{color:#ffc107}.language-switcher:hover{background:rgba(255,255,255,.1)}