* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body.signin {
            font-family: 'Poppins', sans-serif;
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 100vh;
            padding: 20px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            position: relative;
            overflow-x: hidden;
        }

        body.signin::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23ffffff" fill-opacity="0.1" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,122.7C672,117,768,139,864,138.7C960,139,1056,117,1152,101.3C1248,85,1344,75,1392,69.3L1440,64L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
            background-size: cover;
        }

        .panel-signin {
            width: 100%;
            max-width: 480px;
            margin: 0 auto;
            background: #fff;
            border-radius: 20px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
            overflow: hidden;
            position: relative;
            z-index: 1;
            animation: slideUp 0.5s ease;
        }

        @keyframes slideUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .panel-body {
            padding: 40px 35px;
        }

        .logo {
            text-align: center;
            margin-bottom: 30px;
        }

        .logo img {
            max-width: 140px;
            height: auto;
            margin-bottom: 15px;
            animation: pulse 2s ease-in-out infinite;
        }

        @keyframes pulse {
            0%, 100% {
                transform: scale(1);
            }
            50% {
                transform: scale(1.05);
            }
        }

        .logo h6 {
            margin: 0;
            font-size: 18px;
            color: #333;
            font-weight: 600;
        }

        .welcome-text {
            text-align: center;
            margin-bottom: 30px;
        }

        .welcome-text h5 {
            font-size: 24px;
            font-weight: 600;
            color: #333;
            margin-bottom: 5px;
        }

        .welcome-text p {
            font-size: 14px;
            color: #666;
            margin: 0;
        }

        .input-group {
            position: relative;
            display: flex;
            width: 100%;
            margin-bottom: 15px;
        }

        .input-group-addon {
            padding: 12px 15px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            border-radius: 10px 0 0 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            min-width: 50px;
            font-size: 18px;
        }

        .input-group .form-control {
            flex: 1;
            padding: 12px 45px 12px 15px;
            border: 2px solid #e0e0e0;
            border-radius: 0 10px 10px 0;
            font-size: 15px;
            transition: all 0.3s ease;
            background-color: #f8f9fa;
        }

        .input-group .form-control:focus {
            outline: none;
            border-color: #667eea;
            background-color: #fff;
            box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
        }

        .password-toggle-inline {
            position: absolute;
            right: 10px;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            color: #999;
            cursor: pointer;
            padding: 8px;
            z-index: 2;
            font-size: 18px;
            transition: color 0.3s;
            border-radius: 5px;
        }

        .password-toggle-inline:hover {
            color: #667eea;
            background-color: rgba(102, 126, 234, 0.1);
        }

        .mb15 {
            margin-bottom: 15px;
        }

        .clearfix {
            display: flex;
            justify-content: flex-end;
            width: 100%;
            margin-top: 10px;
        }

        .pull-right {
            margin-left: auto;
        }

        .btn {
            padding: 12px 30px;
            border: none;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .btn-success {
            background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
            color: white;
            box-shadow: 0 4px 15px rgba(40, 167, 69, 0.3);
        }

        .btn-success:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(40, 167, 69, 0.4);
        }

        .btn-success:active {
            transform: translateY(0);
        }

        .ml5 {
            margin-left: 5px;
        }

        .alert {
            padding: 14px 18px;
            margin-bottom: 25px;
            border-radius: 10px;
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 10px;
            animation: slideDown 0.3s ease;
        }

        @keyframes slideDown {
            from {
                opacity: 0;
                transform: translateY(-10px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .alert-danger {
            background-color: #fee;
            color: #c33;
            border: 2px solid #fcc;
        }

        .alert-warning {
            background-color: #fff3cd;
            color: #856404;
            border: 2px solid #ffeaa7;
        }

        .btn-submit {
            width: 100%;
            padding: 14px;
            border: none;
            border-radius: 10px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
            margin-top: 10px;
        }

        .btn-submit:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
        }

        .btn-submit:active {
            transform: translateY(0);
        }

        .btn-submit {
            width: 100%;
            padding: 14px;
            border: none;
            border-radius: 10px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
            margin-top: 10px;
        }

        .btn-submit:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
        }

        .btn-submit:active {
            transform: translateY(0);
        }

        .panel-footer {
            background-color: #f8f9fa;
            padding: 25px 35px;
            border-top: 1px solid #e0e0e0;
        }

        .panel-footer strong {
            color: #333;
            font-size: 14px;
            display: block;
            margin-bottom: 10px;
        }

        .panel-footer ul {
            margin: 0;
            padding-left: 20px;
        }

        .panel-footer li {
            margin-bottom: 10px;
            font-size: 13px;
            line-height: 1.7;
            color: #555;
        }

        /* Responsive Design */
        @media (max-width: 576px) {
            body.signin {
                padding: 15px;
            }

            .panel-signin {
                border-radius: 15px;
            }

            .panel-body {
                padding: 30px 25px;
            }

            .panel-footer {
                padding: 20px 25px;
            }

            .logo img {
                max-width: 110px;
            }

            .logo h6 {
                font-size: 16px;
            }

            .welcome-text h5 {
                font-size: 20px;
            }

            .input-group-addon {
                min-width: 45px;
                font-size: 16px;
                padding: 10px;
            }

            .input-group .form-control {
                padding: 12px 15px;
            }

            .password-toggle-inline {
                padding: 6px;
                font-size: 16px;
            }

            .btn {
                width: 100%;
                padding: 10px 20px;
                font-size: 14px;
            }

            .panel-footer li {
                font-size: 12px;
            }
        }

        @media (max-width: 400px) {
            .panel-body {
                padding: 25px 20px;
            }

            .logo img {
                max-width: 90px;
            }

            .input-group-addon {
                min-width: 40px;
                font-size: 14px;
            }
        }