*{margin:0;padding:0;box-sizing:border-box}:root{--primary-color:#ff6b35;--primary-dark:#e85a2a;--text-dark:#2c3e50;--text-light:#7f8c8d;--bg-light:#f8f9fa;--white:#ffffff;--error:#e74c3c;--success:#27ae60;--shadow:rgba(0, 0, 0, 0.1);--shadow-hover:rgba(0, 0, 0, 0.15)}body{font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif;background:linear-gradient(135deg,#667eea 0,#764ba2 100%);min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}.login-container{width:100%;max-width:450px;animation:.6s ease-out fadeInUp}@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.login-card{background:var(--white);border-radius:16px;box-shadow:0 20px 60px rgba(0,0,0,.3);padding:40px;position:relative;overflow:hidden}.login-card::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--primary-color),#ff8c61)}.login-header{text-align:center;margin-bottom:35px}.login-logo{width:64px;height:64px;margin-bottom:20px;filter:drop-shadow(0 4px 8px rgba(0, 0, 0, .1))}.login-header h1{color:var(--text-dark);font-size:28px;font-weight:700;margin-bottom:8px}.login-subtitle{color:var(--text-light);font-size:14px;font-weight:400}.login-form{display:flex;flex-direction:column;gap:20px}.form-group{display:flex;flex-direction:column;gap:8px}.form-group label{color:var(--text-dark);font-size:14px;font-weight:600;margin-left:4px}.form-group input{padding:14px 16px;border:2px solid #e1e8ed;border-radius:8px;font-size:15px;color:var(--text-dark);background:var(--white);transition:.3s;outline:0}.form-group input:focus{border-color:var(--primary-color);box-shadow:0 0 0 3px rgba(255,107,53,.1)}.form-group input::placeholder{color:#bdc3c7}.error-message{padding:12px 16px;background:#fee;border:1px solid #fcc;border-radius:8px;color:var(--error);font-size:14px;display:none;animation:.4s shake}.error-message.show{display:block}@keyframes shake{0%,100%{transform:translateX(0)}10%,30%,50%,70%,90%{transform:translateX(-8px)}20%,40%,60%,80%{transform:translateX(8px)}}.login-btn{padding:14px 24px;background:var(--primary-color);color:var(--white);border:none;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;transition:.3s;margin-top:10px;position:relative;overflow:hidden}.login-btn:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 8px 20px rgba(255,107,53,.3)}.login-btn:active{transform:translateY(0)}.login-btn:disabled{background:#bdc3c7;cursor:not-allowed;transform:none}.btn-text{display:inline-block}.btn-loader{display:none;align-items:center;gap:8px}.login-btn.loading .btn-text{display:none}.login-btn.loading .btn-loader{display:inline-flex}.spinner{width:16px;height:16px;border:2px solid rgba(255,255,255,.3);border-top-color:var(--white);border-radius:50%;animation:.6s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.login-footer{margin-top:30px;padding-top:20px;border-top:1px solid #e1e8ed;text-align:center}.login-footer p{color:var(--text-light);font-size:13px}@media (max-width:480px){.login-card{padding:30px 25px}.login-header h1{font-size:24px}.login-logo{width:56px;height:56px}.form-group input{padding:12px 14px;font-size:14px}.login-btn{padding:12px 20px;font-size:15px}}@keyframes success{0%,100%{transform:scale(1)}50%{transform:scale(1.05)}}.login-btn.success{background:var(--success);animation:.4s success}